JP5770315B2 - Touch sensor system and electronic device - Google Patents

Description

  The present invention relates to a touch sensor system that operates according to a method of estimating or detecting a coefficient, element value, or capacitance of a linear system configured in a matrix, and detects a touch signal based on a touch on a touch panel, and an electronic device About.

  A device for detecting linear element values distributed in a matrix, for example, a capacitance matrix Cij (i = 1,..., M, j = 1) formed between M drive lines and L sense lines. ,..., L) is disclosed in Patent Document 1 as a touch sensor device (contact detection device) that detects a distribution of capacitance values. This touch sensor device operates by a scanning detection method in which drive lines are selected in order and the value of a linear element connected to the selected drive line is detected.

  Further, a plurality of drive lines are driven by being divided into a first drive line group and a second drive line group based on a time-series code sequence, and are connected to sense lines. Outputs a measurement voltage obtained by converting the total current generated in the capacitance at the intersection of each into an electrical signal, performs a product-sum operation on the sense line for each sense line, and a voltage value corresponding to the capacitance at each intersection Patent Document 2 discloses a capacitance detection circuit for obtaining the above.

  In a conventional touch sensor system that detects a distribution of capacitance values, as shown in Patent Document 6, an attempt is made to recognize a finger and a hand touching a touch panel by signal processing. For example, considering a situation in which a hand holding a pen is touching the touch panel, a signal based on the touch state on the touch panel greatly changes with the passage of time according to an operation of moving the pen or the like.

  (A)-(d) of FIG. 20 is a figure for demonstrating the touch signal in the state which put the hand on the touch panel. Referring to FIG. 20A, the area where the hand has touched the touch panel is initially small in area 116a. Then, referring to (b) of FIG. 20, the area of the hand that has reached the touch panel expands with time and becomes an area 116 b. Next, referring to (c) of FIG. 20, the area of the hand that has touched the touch panel further expands with the passage of time, and the pen input area 118 appears when the tip of the pen held by the hand touches the touch panel. Thereafter, as shown in FIG. 20D, the area touched by the hand changes from the area 116c to the area 116d, and an area 117 where the finger touches the touch panel appears.

Japanese Patent Publication “Japanese Patent Laid-Open No. 2010-92275 (published on April 22, 2010)” Japanese Patent Publication “Patent No. 4364609 Specification (published on June 16, 2005)” Japanese Patent Publication “Patent No. 4387773 (published on June 16, 2005)” Japanese Patent Publication “Japanese Patent Laid-Open No. 2005-114362 (published on April 28, 2005)” Japanese Patent Publication “JP 2005-134240 A (published May 26, 2005)” US Pat. No. 7,812,828 (October 12, 2010)

  However, in the touch sensor device that operates according to the scanning detection method described in Patent Document 1, when a given time for acquiring a two-dimensionally distributed capacitance value is T and the number of scans is m, The process of selecting a plurality of lines simultaneously and scanning them to detect the capacitance of the capacitance matrix Cij must be completed during time (T / m).

  In general, the accuracy of the detection process can be increased as the processing time is increased, for example, by averaging or the like, but in order for the touch sensor device to follow a high-speed operation, the time given for acquiring the capacitance value It is necessary to reduce T, and in order to increase the resolution, it is necessary to increase the number of scans m. In any case, there is a problem that the processing time (T / m) decreases and the detection accuracy deteriorates.

  Further, in the capacitance detection circuit described in Patent Document 2, in order to cancel the offset error of the measurement voltage, the first detection line and the second drive line are driven based on the code sequence, and the first detection line is driven. The measurement voltage based on driving of the second drive line is subtracted from the measured voltage based on driving of the drive line (Patent Document 2: Paragraphs [0058] to [0061] of the specification). However, such a configuration has a problem that it is disadvantageous in speeding up with reduced power consumption because the calculation process takes two phases.

  As shown in FIGS. 20A to 20D, based on the signal from the region that appears changing, the signal based on the pen input, the signal that the hand touched the touch panel, and the finger touched the touch panel. It is difficult to accurately identify a signal due to a touch, and there is a risk that a signal based on pen input, a signal due to a touch on the touch panel, and a signal due to a finger touching the touch panel may be erroneously recognized. There is.

  An object of the present invention is to provide a touch sensor system and an electronic device that have high detection accuracy, good resolution, and high-speed operation.

  Another object of the present invention is to provide a touch sensor system and an electronic apparatus that do not cause a possibility of erroneously recognizing a signal based on pen input.

  In order to solve the above problem, the touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,...) Formed between M drive lines and one sense line. M) and each of the second capacitance columns C2i (i = 1,..., M) formed between the M drive lines and the other sense line. Based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N constituted by +1 or −1, when the code sequence is +1 + V volts, and in the case of -1, the M drive lines are driven in parallel so as to apply -V volts, and the output sFirst = (s11, s12, ..., from the first capacitance string) s1N) and the output sSe from the second capacitance string ond = (s21, s22,..., s2N), and the first capacitance column corresponding to the k1st drive line based on the inner product calculation of the output sFirst and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on an inner product operation of the output sSecond and the code sequence di; Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, the drive line, the sense line, and one or more partial areas, and a remaining area that is an area other than the partial area A sensor panel having a two-dimensional area; a first processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area; and a residual corresponding to a touch on the residual area. Second processing means for executing a second type of processing different from the first processing based on a region touch signal, and the partial region surrounds a region to be handed for input to the sensor panel A touch area, the partial area touch signal is a touch area touch signal corresponding to a touch on the touch area, and the remaining area touch signal includes at least one of a pen drawing signal and a finger touch signal. It is characterized by that.

  With this feature, the first process is executed based on the partial area touch signal corresponding to the touch on the partial area, and is different from the first process based on the residual area touch signal corresponding to the touch on the residual area. The second process is executed. For this reason, it is possible to carry out a process in which a signal based on an unintended touch input input to the partial region and a signal based on the intended touch input input to the remaining region are treated separately. As a result, it is possible to provide a touch sensor system in which there is no possibility that a signal based on an unintended touch input input to the partial area is erroneously recognized as a signal based on an intended pen input input to the remaining area.

  Another touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and the M Sensor panel having a second capacitance column C2i (i = 1,..., M) formed between one drive line and another sense line, and an integrated circuit for controlling the sensor panel The integrated circuit includes the first capacitance column C1i (i = 1,..., M) and the second capacitance column C2i (i = 1, .., M), the length N of orthogonal code sequences di = (di1, di2,..., DiN) (i = 1,. Based on the above, when the code sequence is +1, + V volts, and when the code sequence is −1, The M drive lines are driven in parallel so as to apply V volts, and the output from the first capacitance string sFirst = (s11, s12,..., S1N), and the second static Based on the inner product calculation of the output sFirst and the code sequence di based on the drive unit that outputs the output sSecond = (s21, s22,..., S2N) from the capacitance string, the first drive line corresponding to the k1st drive line The capacitance value of the first capacitance string is estimated, and the capacitance value of the second capacitance string corresponding to the k2nd drive line is estimated based on the inner product calculation of the output sSecond and the code sequence di. The sensor panel includes a two-dimensional region including one or more partial regions and a remaining region other than the partial region, and the integrated circuit includes the partial region. Separately from the first processing based on the first processing means for executing the first processing based on the partial region touch signal corresponding to the touch to the touch, and the residual region touch signal corresponding to the touch on the residual region. Second processing means for executing a second processing of a type, wherein the partial area is a hand-held area surrounding an area to be reached for input to the sensor panel, and the partial area touch signal is The touch area touch signal corresponds to a touch on the touch area, and the remaining area touch signal includes at least one of a pen drawing signal and a finger touch signal.

  An electronic apparatus according to the present invention includes the touch sensor system according to the present invention, and a display panel that is disposed so as to overlap with a sensor panel provided in the touch sensor system or that includes the sensor panel. It is characterized by.

Still another touch sensor system according to the present invention includes a first capacitance column C 1i (i = 1,..., M) formed between M drive lines and one sense line, and For each second capacitance column C 2i (i = 1,..., M) formed between the M drive lines and the other sense line, each element is +1 or − Based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N constituted by 1, the M drive lines are driven in parallel, Analog integration of output sFirst = (s11, s12,..., S1N) from the first capacitance string and output sSecond = (s21, s22,..., S2N) from the second capacitance string A drive unit that outputs to the instrument, and the output sFirst Based on the inner product operation with the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and based on the inner product operation between the output sSecond and the code sequence di. , A touch sensor system including an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2th drive line, wherein the drive unit is configured to perform the operation when the code sequence is +1. the the first voltage during the reset of the analog integrator, the drive line is driven by the second voltage when the output of the sampling from the first and second capacitance column, if the code sequence of said -1 is by the second voltage when the analog integrator is reset, driving the drive line by said first voltage at the time of sampling of the output from the first and second capacitance column Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, one or more partial regions, and a remaining region that is a region other than the partial region, A sensor panel having a two-dimensional area, a first processing means for executing a first process based on a partial area touch signal corresponding to the touch on the partial area, and a residual corresponding to the touch on the residual area And a second processing means for executing a second process different from the first process based on a region touch signal, wherein the partial region is a region to be handed for input to the sensor panel. A hand-held area touch signal corresponding to a touch on the hand-held area, and the remaining area touch signal includes a pen drawing signal and a finger touch signal. Characterized in that it comprises at least one of the.

Still another touch sensor system according to the present invention includes a first capacitance column C 1i (i = 1,..., M) formed between M drive lines and one sense line, and For each second capacitance column C 2i (i = 1,..., M) formed between the M drive lines and the other sense line, each element is +1 or − Based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N constituted by 1, the M drive lines are driven in parallel, Analog integration of output sFirst = (s11, s12,..., S1N) from the first capacitance string and output sSecond = (s21, s22,..., S2N) from the second capacitance string A drive unit that outputs to the instrument, and the output sFirst Based on the inner product operation with the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and based on the inner product operation between the output sSecond and the code sequence di. , a touch sensor system comprising a estimation unit that estimates a capacitance value of the second capacitance column corresponding to k2-th drive line, the drive unit, the first and second electrostatic before outputting the output from the capacitance column to the analog integrator, when the analog integrator is reset, and the drive line by a first voltage at the time of sampling of the output from the first and second capacitance column Driving, outputting the outputs from the first and second capacitance strings to the analog integrator, and using the outputs from the first and second capacitance strings as an offset output, the analog integration Is read from and stored in the memory, corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, one or more partial regions, and other than the partial regions A sensor panel having a two-dimensional area consisting of a remaining area, a first processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area, and the remaining area And a second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the sub-area, wherein the partial area is an input to the sensor panel. The partial area touch signal is a touch area touch signal corresponding to a touch on the touch area, and the remaining area touch signal is generated by a pen. Characterized in that it comprises at least one of the touch signal by the drawing signal and fingers.

Still another touch sensor system according to the present invention includes a first capacitance column C 1i (i = 1,..., M) formed between M drive lines and one sense line, and A sensor panel including a second capacitance column C 2i (i = 1,..., M) formed between the M drive lines and the other sense line; and controls the sensor panel. The integrated circuit includes a first capacitance column C 1i (i = 1,..., M), and a second capacitance column C 2i. For each (i = 1,..., M), a length N orthogonal code sequence di = (di1, di2,..., DiN) (i = 1, ..., M), driving the M drive lines in parallel, The output sFirst = (s11, s12,..., S1N) from one capacitance string and the output sSecond = (s21, s22,... S2N) from the second capacitance string to an analog integrator Based on the inner product calculation of the output drive unit, the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the output sSecond and the output An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on an inner product operation with the code sequence di, and the drive unit includes the code sequence If There the +1, by a first voltage when the analog integrator is reset, driving the drive line with a second voltage when the output of the sampling from the first and second capacitance column Dynamic and, if the code sequence of said -1 above, by the second voltage when the analog integrator is reset by the first voltage at the time of sampling of the output from the first and second capacitance column The drive line is driven, and the sensor panel has a two-dimensional region including one or more partial regions and a remaining region other than the partial region, and the integrated circuit touches the partial region. The first processing means for executing the first process based on the partial area touch signal corresponding to the second area and the residual area touch signal corresponding to the touch on the remaining area, the first process is different from the first process. A second processing means for performing two processes, wherein the partial area is a hand-held area surrounding an area to be put on for input to the sensor panel, and the partial area touch signal is the hand touch A Otetsuki area touch signal corresponding to the touch of the band, the remaining area touch signal, characterized in that it comprises at least one of the touch signal by the drawing signal and fingers by the pen.

Still another touch sensor system according to the present invention includes a first capacitance column C 1i (i = 1,..., M) formed between M drive lines and one sense line, and A sensor panel including a second capacitance column C 2i (i = 1,..., M) formed between the M drive lines and the other sense line; and controls the sensor panel. The integrated circuit includes a first capacitance column C 1i (i = 1,..., M), and a second capacitance column C 2i. For each (i = 1,..., M), a length N orthogonal code sequence di = (di1, di2,..., DiN) (i = 1, ..., M), driving the M drive lines in parallel, The output sFirst = (s11, s12,..., S1N) from one capacitance string and the output sSecond = (s21, s22,... S2N) from the second capacitance string to an analog integrator Based on the inner product calculation of the output drive unit, the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the output sSecond and the output And an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the inner product calculation with the code sequence di, and the drive unit includes the first in and before outputting the output from the second capacitance column to said analog integrator, when the analog integrator is reset, and at the output of the sampling from the first and second capacitance column The drive line is driven by a first voltage, outputs from the first and second capacitance strings are output to the analog integrator, and outputs from the first and second capacitance strings are output. The sensor panel reads out from the analog integrator as an offset output and stores it in a memory. The sensor panel has a two-dimensional region including one or more partial regions and a remaining region other than the partial region, and the integrated The circuit includes: a first processing unit configured to perform a first process based on a partial area touch signal corresponding to a touch on the partial area; and a residual area touch signal corresponding to a touch on the residual area. A second processing means for performing a second process different from the first process, wherein the partial area is a hand-held area surrounding an area to be put on for input to the sensor panel; Partial region Touch
The signal is a hand area touch signal corresponding to a touch on the hand area, and the remaining area touch signal includes at least one of a pen drawing signal and a finger touch signal.

Still another touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and For each of the second capacitance columns C2i (i = 1,..., M) formed between the M drive lines and the other sense line, each element is +1 or −1. Based on the configured orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N, + V volts when the code sequence is +1, −1 In this case, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = (s11, s12,..., S1N) from the first capacitance row, and Output sSecond = (s21 from the second capacitance string s22,..., s2N), and the capacitance value of the first capacitance string corresponding to the k1st drive line is estimated based on the inner product calculation of the output sFirst and the code sequence di. And an estimation unit for estimating a capacitance value of the second capacitance string corresponding to the k2nd drive line based on an inner product operation of the output sSecond and the code sequence di, the drive line, and the sense Corresponding to the line, the first capacitance row, and the second capacitance row, and having a two-dimensional region including one or more partial regions and a remaining region other than the partial region Based on a sensor panel, a partial area touch signal corresponding to a touch on the partial area, a first processing means for executing a first process, and a residual area touch signal corresponding to a touch on the residual area And a second processing means for executing a second type of processing different from the first processing, and the partial region is a hand-held region surrounding a region to be handed for input to the sensor panel. The partial area touch signal is a touch area touch signal corresponding to a touch on the touch area, and the remaining area touch signal includes at least one of a pen drawing signal and a finger touch signal, The processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the touch area touch signal, and the second processing means is based on the remaining area touch signal. A process based on at least one of a drawing input and a touch input to the two-dimensional area, and the hand-held area is used for input to the sensor panel. It is characterized by moving on the two-dimensional area so as to follow the movement of the center of gravity of the area where the hand is put on.
Still another touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and A sensor panel comprising a second capacitance column C2i (i = 1,..., M) formed between M drive lines and another sense line, and an integrated circuit for controlling the sensor panel. The integrated circuit includes a first capacitance column C1i (i = 1,..., M) and a second capacitance column C2i (i = 1). ,..., M) and a length N orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M). If the code sequence is +1, + V volts, -1 In this case, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = (s11, s12,..., S1N) from the first capacitance string, and the first Corresponding to the k1th drive line based on a drive unit that outputs an output sSecond = (s21, s22,..., S2N) from the capacitance array of 2 and an inner product operation of the output sFirst and the code sequence di The capacitance value of the first capacitance string corresponding to the k2nd drive line is estimated based on the inner product calculation of the output sSecond and the code sequence di. An estimation unit that estimates a value, and the sensor panel includes a two-dimensional region including one or more partial regions and a remaining region that is a region other than the partial region, and the integrated circuit includes: First processing means for executing a first process based on a partial area touch signal corresponding to a touch on a partial area; and the first process based on a residual area touch signal corresponding to a touch on the residual area; Further includes second processing means for executing another type of second processing, wherein the partial area is a hand-held area surrounding an area to be reached for input to the sensor panel, and the partial area touch signal Is a hand area touch signal corresponding to a touch on the hand area, and the remaining area touch signal includes at least one of a pen drawing signal and a finger touch signal, and the first processing means includes the hand touch signal. Based on the area touch signal, a process related to the movement of the hand-held area or the change of the size of the hand-held area is executed, and the second processing means is configured to execute the remaining area tag. A processing based on at least one of a drawing input and a touch input to the two-dimensional region is performed based on the touch signal, and the touched region is a center of gravity of a region to be handed for input to the sensor panel. It moves on the two-dimensional area so as to follow the movement.
Still another touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and For each of the second capacitance columns C2i (i = 1,..., M) formed between the M drive lines and the other sense line, each element is +1 or −1. Based on the configured code sequence di = (di1, di2,..., DiN) (i = 1,..., M) having a length of N, the M drive lines are driven in parallel, and the first The output sFirst = (s11, s12,..., S1N) from one capacitance string and the output sSecond = (s21, s22,... S2N) from the second capacitance string to an analog integrator An output drive unit, the output sFirst and the output Based on the inner product operation with the signal sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and based on the inner product operation between the output sSecond and the code sequence di, a touch sensor system including an estimation unit that estimates a capacitance value of the second capacitance string corresponding to a k-th drive line, and the drive unit is configured such that when the code sequence is +1, When the analog integrator is reset, the drive line is driven by the first voltage at the time of sampling the output from the first and second capacitance strings, and the code sequence is −1. The drive line is driven by the second voltage when the analog integrator is reset, and by the first voltage when the output from the first and second capacitance columns is sampled. Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, from one or more partial regions and a remaining region that is a region other than the partial region A sensor panel having a two-dimensional area, a first processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area, and a residual area corresponding to a touch on the residual area And a second processing means for performing a second process different from the first process based on a touch signal, wherein the partial area surrounds an area to be reached for input to the sensor panel. A touch area, the partial area touch signal is a touch area touch signal corresponding to a touch on the touch area, and the remaining area touch signal includes a drawing signal by a pen, a touch signal by a finger, The first processing means executes processing related to movement of the hand-held area or change in size of the hand-held area based on the hand-touch area touch signal, and the second processing means. Performs processing based on at least one of drawing input and touch input to the two-dimensional area based on the remaining area touch signal, and the touched area is put on for input to the sensor panel. It moves on the two-dimensional area so as to follow the movement of the center of gravity of the area.
Still another touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and For each of the second capacitance columns C2i (i = 1,..., M) formed between the M drive lines and the other sense line, each element is +1 or −1. Based on the configured code sequence di = (di1, di2,..., DiN) (i = 1,..., M) having a length of N, the M drive lines are driven in parallel, and the first The output sFirst = (s11, s12,..., S1N) from one capacitance string and the output sSecond = (s21, s22,... S2N) from the second capacitance string to an analog integrator An output drive unit, the output sFirst and the output Based on the inner product operation with the signal sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and based on the inner product operation between the output sSecond and the code sequence di, a touch sensor system including an estimation unit that estimates a capacitance value of the second capacitance row corresponding to the k2th drive line, wherein the driving unit includes the first and second capacitances. Drive the drive line with a first voltage before resetting the analog integrator and sampling the output from the first and second capacitance columns before outputting the output from the column to the analog integrator The outputs from the first and second capacitance strings are output to the analog integrator, and the outputs from the first and second capacitance strings are used as offset outputs. Read out and stored in the memory, corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, one or more partial areas, and other than the partial areas A sensor panel having a two-dimensional area consisting of a remaining area, a first processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area, and the remaining area And a second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the sub-area, wherein the partial area is an input to the sensor panel. Therefore, the partial area touch signal is a touch area touch signal corresponding to a touch on the touch area, and the remaining area touch signal is drawn with a pen. At least one of an image signal and a finger touch signal, and the first processing means performs processing related to movement of the hand-held area or change in size of the hand-held area based on the hand-touch area touch signal. The second processing means executes processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal, and the hand region is transferred to the sensor panel. It moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put in for input.
Still another touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and A sensor panel including a second capacitance column C2i (i = 1,..., M) formed between M drive lines and another sense line, and an integration for controlling the sensor panel The integrated circuit includes a first capacitance column C1i (i = 1,..., M) and a second capacitance column C2i (i = 1). ,..., M) and a length N orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M). And driving the M drive lines in parallel, Drive that outputs the output sFirst = (s11, s12,..., S1N) from the capacitance string and the output sSecond = (s21, s22,..., S2N) from the second capacitance string to the analog integrator. And the output value sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the output sSecond and the code sequence di And an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the inner product calculation with the second product line, and the drive unit has the code sequence of the +1 In this case, the drive line is driven by the first voltage when the analog integrator is reset and by the second voltage when the outputs from the first and second capacitance strings are sampled. When the code sequence is −1, the drive line is driven by the second voltage when the analog integrator is reset and by the first voltage when sampling the outputs from the first and second capacitance strings. The sensor panel is driven and has a two-dimensional area including one or more partial areas and a remaining area other than the partial area, and the integrated circuit responds to a touch on the partial area. Based on the partial area touch signal, first processing means for executing the first process, and based on the residual area touch signal corresponding to the touch on the residual area, a second process different from the first process is performed. A second processing means for executing the processing, wherein the partial area is a hand-held area surrounding an area to be handed for input to the sensor panel, and the partial area touch signal is sent to the hand-held area. And the remaining area touch signal includes at least one of a pen drawing signal and a finger touch signal, and the first processing means is based on the hand area touch signal. , Executing a process related to the movement of the hand-held area or the change of the size of the hand-held area, and the second processing means performs drawing input and touch on the two-dimensional area based on the remaining area touch signal. Performing processing based on at least one of the input, and moving the hand-held region on the two-dimensional region so as to follow the movement of the center of gravity of the region to be handed for input to the sensor panel. Features.
Still another touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and A sensor panel including a second capacitance column C2i (i = 1,..., M) formed between M drive lines and another sense line, and an integration for controlling the sensor panel The integrated circuit includes a first capacitance column C1i (i = 1,..., M) and a second capacitance column C2i (i = 1). ,..., M) and a length N orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M). And driving the M drive lines in parallel, Drive that outputs the output sFirst = (s11, s12,..., S1N) from the capacitance string and the output sSecond = (s21, s22,..., S2N) from the second capacitance string to the analog integrator. And the output value sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the output sSecond and the code sequence di And an estimation unit that estimates a capacitance value of the second capacitance column corresponding to the k2nd drive line based on the inner product calculation with the first and second drive units. Before outputting the output from the capacitance column to the analog integrator, when the analog integrator is reset and when the output from the first and second capacitance rows is sampled. The drive line is driven by pressure, the outputs from the first and second capacitance strings are output to the analog integrator, and the outputs from the first and second capacitance strings are offset output. The sensor panel has a two-dimensional area composed of one or more partial areas and a remaining area other than the partial area, and the integrated circuit includes: A first processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area; and a first area based on a residual area touch signal corresponding to a touch on the residual area. And a second processing means for executing a second process different from the process, wherein the partial area is a hand-held area surrounding an area to be put in for input to the sensor panel, and the partial area T The H signal is a touch area touch signal corresponding to a touch on the touch area, and the remaining area touch signal includes at least one of a pen drawing signal and a finger touch signal, and the first processing means includes: Based on the touched area touch signal, a process related to movement of the touched area or a change in the size of the touched area is executed, and the second processing means is configured to execute the process based on the remaining area touch signal. The processing based on at least one of drawing input and touch input to the three-dimensional area is executed, and the touched area follows the movement of the center of gravity of the area to be handed for input to the sensor panel. It moves on a dimensional area.
Another electronic device according to the present invention includes the touch sensor system according to the present invention, and a display panel that is disposed so as to overlap the sensor panel provided in the touch sensor system or that includes the sensor panel. It is characterized by that.

In the touch sensor system according to the present invention, the first process is performed based on the partial area touch signal corresponding to the touch on the partial area, and the first process is performed based on the residual area touch signal corresponding to the touch on the residual area. A second process of a different type from the process is executed, and the partial area is a hand-held area that surrounds an area to be handed for input to the sensor panel, and the partial area touch signal is sent to the hand-held area. A touch area touch signal corresponding to a touch, wherein the remaining area touch signal includes at least one of a pen drawing signal and a finger touch signal, and the first processing means is based on the touch area touch signal, The second processing means executes the process related to the movement of the hand area or the change of the size of the hand area, and the second processing means Based on at least one of drawing input and touch input to the two-dimensional region, and the hand-held region follows the movement of the center of gravity of the region to be handed for input to the sensor panel Move on the two-dimensional region.
For this reason, a signal based on an unintended touch input that is input to a partial area when a hand holding the input pen at an arbitrary position on the two-dimensional area is put on the sensor panel, and a residual based on drawing on the sensor panel It is possible to perform a process for separately treating a signal based on an intended touch input input to the region. As a result, a signal based on an unintended touch input, which is input to the partial area, recognizes risk erroneously signal based on the intended pen input is input to the remaining area is rather name There are easy performs handwriting input by the pen touch A sensor system can be provided.

It is a circuit diagram which shows the structure of the touch sensor system which concerns on embodiment. It is a block diagram which shows the structure of the estimation part of the integrated circuit provided in the said touch sensor system. It is a figure for demonstrating the drive method of the sensor panel provided in the said touch sensor system. It is a timing chart for demonstrating the drive method of the said sensor panel. It is a figure for demonstrating the specific example of the orthogonal code series input into the sensor panel provided in the said touch sensor system. It is a figure for demonstrating the other specific example of the said orthogonal code sequence. It is a figure for demonstrating the other specific example of the said orthogonal code sequence. 6 is a timing chart for explaining a method of driving a sensor panel provided in the touch sensor system according to the second embodiment. 12 is another timing chart for explaining a method of driving a sensor panel provided in the touch sensor system according to the second embodiment. 10 is a diagram for explaining a method for driving a sensor panel according to Embodiment 3. FIG. (A) And (b) is a figure for demonstrating the code series for driving the sensor panel which concerns on Embodiment 4. FIG. FIG. 10 is a diagram for describing a code sequence for driving a sensor panel according to a fifth embodiment. It is a graph which shows the method of driving the said sensor panel. (A) is a figure for demonstrating the code sequence based on M series which concerns on embodiment, (b) is a figure which shows the specific example of the code sequence based on M sequence. It is a functional block diagram which shows the structure of the mobile telephone carrying the said touch sensor system. FIG. 10 is a schematic diagram illustrating a configuration of a touch sensor system according to a seventh embodiment. It is a figure which shows the area | region with a handle set to the touch panel of the said touch sensor system. FIGS. 18A and 18B are diagrams illustrating an example of the user setting method for the touched area. FIGS. 19A and 19B are diagrams showing an example of the user setting method for the touched area. (A)-(d) of FIG. 20 is a figure for demonstrating the touch signal in the state which put the hand on the touch panel.

  One embodiment of the touch sensor system of the present invention will be described below with reference to FIGS.

(Embodiment 1)
(Configuration of Touch Sensor System According to Embodiment)
FIG. 1 is a circuit diagram illustrating a configuration of a touch sensor system 1 according to an embodiment. The touch sensor system 1 includes a sensor panel 2 and an integrated circuit 3 that controls the sensor panel 2. The sensor panel 2 includes M drive lines DL1 to DLM arranged parallel to each other at a predetermined interval along the horizontal direction and a predetermined interval parallel to each other along a direction intersecting the drive lines. Are arranged in a matrix of M rows and L columns between each of the L sense lines SL1 to SLL and each of these M drive lines DL1 to DLM and each of the L sense lines SL1 to SLL. Capacitance Cij (i = 1 to M, j = 1 to L).

  The integrated circuit 3 has a drive unit 4 connected to M drive lines DL1 to DLM. The integrated circuit 3 is provided with an estimation unit 5. FIG. 2 is a block diagram illustrating a configuration of the estimation unit 5 of the integrated circuit 3.

  The estimation unit 5 includes L analog integrators 6 connected to the L sense lines SL1 to SLL, a switch 7 connected to the L analog integrators 6, and an AD conversion connected to the switch 7. A product 8, an inner product calculation unit 9 connected to the AD converter 8, and a RAM 10 connected to the inner product calculation unit 9. The analog integrator 6 includes an operational amplifier having one input grounded, an integration capacitor of a capacitor Cint disposed between the output of the operational amplifier and the other input, a transistor coupled to the other input of the operational amplifier, This transistor and another transistor connected in parallel are included.

  The integrated circuit 3 includes an application processing unit 11 that is connected to the inner product calculation unit 9 and executes a gesture recognition process (such as ARM) at 240 Hz. As described above, the integrated circuit 3 includes both an analog circuit and a digital circuit.

(Operation of conventional touch sensor system)
Before specifically explaining the operation of the present embodiment, the operation in the conventional configuration described in Patent Document 1 will be confirmed. Consider detection of a capacitance matrix Cij (i = 1,..., M, j = 1,..., L) formed between M drive lines and L sense lines. First, consider scan detection in which drive lines are selected one by one.

Capacitance Cij (j = 1,... L) connected to the selected drive line is charged to V volts and a signal of Cij × V is stored. If the gain when reading this signal via the sense line is G, the detection signal is
G × Cij × V (Formula 1)
It becomes.

(Operation of the touch sensor system of the present embodiment)
FIG. 3 is a diagram for explaining a driving method of the sensor panel 2 provided in the touch sensor system 1. The same components as those described above with reference to FIGS. 1 and 2 are denoted by the same reference numerals. Detailed description of these components will not be repeated.

  As an embodiment of the present invention, first, a code sequence di = (di1, di2,..., DiN) (i = 1,. To do. Here, the code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of the code length N is “orthogonal” means that the code sequence di satisfies the following conditions. Say.

  Based on the code sequence di, the drive unit 4 parallels the M drive lines DL1 to DLM so that + V volts are applied in the case of +1 and -V volts are applied in the case of -1. To drive. Then, a signal having a charge of ± Cij · V is stored in each capacitance Cij (i = 1 to M, j = 1 to L) according to each element (+1 or −1) of the code sequence.

  Next, charge addition is performed along the connection of the sense lines with respect to the signal represented by the charge accumulated in each capacitance connected to the same sense line, and is read by the analog integrator 6 for each sense line, and the output series vector sj = (sj1, sj2,..., sjN) (j = 1,..., L) is obtained.

FIG. 4 is a timing chart for explaining a driving method of the sensor panel 2. First,
The integration signal Cint of the analog integrator 6 is reset by the reset signal, and each capacitance arranged in a matrix on the sensor panel 2 is also reset. Here, the reset means that the electric charge accumulated in the capacitor is discharged. When the drive lines DL1 to DLM are driven in parallel at Vref + V or Vref−V according to +1 or −1 which is the value of the code sequence d11, d21, d31,. Charges of ± CV corresponding to the elements ± 1 of the code sequence are stored. Next, charge addition is performed along the connection of the sense lines with respect to signals represented by the charges accumulated in the respective capacitances connected to the same sense line, and the analog integrator 6 reads out the signals for each sense line. The output from the analog integrator 6 includes

(In this circuit, G = −1 / Cint)
Therefore, the output from the analog integrator 6 is AD converted by the AD converter 8 based on the sampling signal.

  The output sequence vector sji is

And

When an inner product operation di · sj between the code sequence di and the output sequence vector sj is performed,

  Comparing the above (Equation 1) and (Equation 2), it can be seen that a detection signal that is N times larger than the conventional scanning readout method can be obtained by the method of the present embodiment.

  When the analog integrator 6 shown in FIGS. 1 and 2 (a charge integrator using an operational amplifier using an integration capacitor Cint) is used as a sense line readout method, the gain G becomes (1 / Cint).

  As described above, the driving unit 4 of the integrated circuit 3 includes the first capacitance string Cip (p is 1 or more and (L−1) or less, i = 1,..., M), and the second capacitance string. For each of Ciq (p <q, q is 2 or more and L or less, i = 1,..., M), each of the elements is +1 or −1 and a length N orthogonal code sequence di = (di1 , Di2,..., DiN) (i = 1,..., M), M drive lines are applied to apply + V volts when the code sequence is +1 and −V volts when −1. Drive in parallel. Then, an output sFirst = (sp1, sp2,..., SpN) from the first capacitance string and an output sSecond = (sq1, sq2,..., SqN) from the second capacitance string are output. .

  Then, the output sFirst = (sp1, sp2,..., SpN) from the first capacitance string is integrated by the corresponding analog integrator 6 and output from the second capacitance string. sSecond = (sq1, sq2,..., sqN) is integrated by the analog integrator 6 provided correspondingly. The switch 7 sequentially switches the analog integrator 6 corresponding to each of the sense lines SL <b> 1 to SLL, and supplies an output from the capacitance string integrated by each analog integrator 6 to the AD converter 8.

  Specifically, first, the output sp1 is read from the first capacitance string to the analog integrator 6 and integrated, and at the same time, the output sq1 from the second capacitance string is transferred to the other analog integrator 6. Read and integrate. The switch 7 is connected to the analog integrator 6 and supplies the output sp1 read and integrated to the ADC 8. Next, the switch 7 disconnects the connection with the analog integrator 6 and connects to the other analog integrator 6, and supplies the read and integrated output sq 1 to the ADC 8. Thereafter, the output sp2 is read from the first capacitance string to the analog integrator 6 and integrated. At the same time, the output sq2 is read from the second capacitance string to the other analog integrator 6 and integrated. Is done. The switch 7 is connected to the analog integrator 6 and supplies the output sp2 read and integrated to the ADC 8. Next, the switch 7 releases the connection with the analog integrator 6 and connects to the other analog integrator 6, and supplies the output sq <b> 2 read and integrated to the ADC 8. In this way, the output spN and the output sqN are sequentially supplied to the ADC 8 by the analog integrator 6 and the switch 7. Further, the analog integrators 6 of all the sense lines operate in parallel with driving of the drive lines.

  The AD converter 8 AD-converts the output from the capacitance string integrated by the analog integrator 6 and supplies it to the inner product calculation unit 9.

  The inner product calculation unit 9 refers to the data stored in the RAM 10 based on the inner product calculation of the output sFirst and the code sequence di, and refers to the first static line corresponding to the k1th drive line (1 ≦ k1 <M). A capacitance value of the capacitance string is estimated, and the second capacitance string corresponding to the k2th drive line (k1 <k2, 1 <k1 ≦ M) based on the inner product calculation of the output sSecond and the code sequence di The capacity value of is estimated.

  The application processing unit 11 executes gesture recognition processing based on the capacitance value estimated by the inner product calculation unit 9 and generates a gesture command.

(Specific example of code sequence)
FIG. 5 is a diagram for explaining a specific example of orthogonal code sequences input to the sensor panel. Specific examples of the orthogonal code sequence di having the length N include the following code sequences.

  A Hadamard matrix, which is a typical orthogonal code sequence, is generated by the sylvester method shown in FIG. As a basic structure, a basic unit of 2 rows × 2 columns is made. The upper right, upper left, and lower left bits of the basic unit are the same, and the lower right is an inversion of these bits.

  Next, the above-described 2 × 2 basic elements are combined as four blocks in the upper right, upper left, lower right, and lower left to create a code of a bit array of 4 rows × 4 columns. Here, as in the creation of the 2 × 2 basic unit, the lower right block is bit-inverted. The code of the bit arrangement of 8 rows × 8 columns and 16 rows × 16 columns is generated in the same procedure. These matrices satisfy the above-described definition of “orthogonal” in the present invention.

  In the present embodiment, for example, if the sensor panel 2 has 16 drive lines, the codes of the 16 × 16 bit arrangement shown in FIG. 5 can be used as orthogonal code sequences. Here, the Hadamard matrix refers to a square matrix whose elements are either 1 or −1 and whose rows are orthogonal to each other. That is, any two rows of the Hadamard matrix represent vectors that are perpendicular to each other.

  As the orthogonal code sequence according to the present embodiment, a matrix obtained by arbitrarily extracting M rows from the Nth-order Hadamard matrix can be used (where M ≦ N). As described below, a Hadamard matrix by a method other than the Sylvester method can also be applied to the present invention.

  FIG. 6 is a diagram for explaining another specific example of orthogonal code sequences, and FIG. 7 is a diagram for explaining another specific example of orthogonal code sequences. An N-order Hadamard matrix by the Sylvester method is a power of N = 2, but if N is a multiple of 4, there is an expectation that a Hadamard matrix exists. For example, in FIG. FIG. 7 shows the Hadamard matrix when N = 20. Hadamard matrices obtained by methods other than these Sylvester methods can also be used as orthogonal code sequences according to the present embodiment.

(Actual product operation)
The inner product matrix C′ij = di · sj is calculated according to the following procedure.
(1) First, the inner product matrix stored in the RAM 10 (FIG. 2) of the estimation unit 5 is reset to C′ij = 0.
(2) The i-th (i = 1,..., M) drive line DLi is driven in parallel with the voltage V × dik at the timing of time tk (one of k = 1,. Is charged with a charge Cij × V × dik.
(3) Each sense line j (j = 1,..., L) is connected to the corresponding analog integrator 6, and the output voltage sjk from the capacitance charged at time tk is read out. The L output voltages sjk read at time tk respectively read by the corresponding L analog integrators 6 are supplied to the AD converter 8 in order by the switch 7 to perform AD conversion, and the AD converter 8 The output voltage sjk at time tk that has been subjected to AD conversion by the above is supplied to the inner product calculation unit 9. The output voltage sjk at time tk supplied to the inner product calculation unit 9 is

It becomes.
(4) The inner product calculation unit 9 performs addition / subtraction according to each of the L output voltages sjk output from the AD converter 8 and the code sequence dik stored in the RAM 10 (when the code sequence dik = 1). Add and subtract when dik = −1), and update the value of C′ij based on the result.

(5) The time is incremented (tk + 1) and the process returns to (1) until N times of processing corresponding to the length of the code sequence are performed.
When the above processing is completed, the value of C′ij becomes the inner product calculation result.

  The number M of drive lines, the number L of sense lines, and the length N of the code sequence of the sensor panel 2 according to the present embodiment are, for example, M = 16 when applied to a 4-inch class portable information terminal or the like. If L = 32, the pitch is about 3 mm. For example, when applied to an electronic device having a 20-inch class screen, M = 48 and L = 80, so that the pitch is about 6 mm. The degree of freedom of the length N of the code sequence is very high, for example, N = 64 to 512.

(Difference from the prior art of driving concept)
The above-described capacitance detection device described in Patent Document 2 also drives a drive line based on a code sequence, is connected to a sense line, and electrically calculates the sum of currents generated in the capacitances at a plurality of intersections with the driven drive line. A measurement voltage converted into a signal is output, and for each sense line, a product-sum operation is performed using the measurement voltage and a code series to obtain a voltage value corresponding to the capacitance of each intersection. However, the drive concept of the drive line is different from the present embodiment as described below.

For example, to simplify the description, consider an example in which capacitors (C1, C2, C3, C4) are formed between one sense line and four drive lines. If the drive signals (code sequences) of the four drive lines are (1, 1, -1, -1) (in the notation of Patent Document 2, (1, 1, 0, 0)), In the form, all drive lines are always driven,
C1 + C2-C3-C4 (Formula 3)
In the configuration disclosed in Patent Document 2, only the drive line corresponding to “1” is driven,
C1 + C2 (Formula 4)
An integral output corresponding to is obtained. Comparing (Equation 3) of this embodiment and (Equation 4) of Patent Document 2, it can be said that the amount of information included in the integrated output of this embodiment is larger.

Also,
Ci = C + ΔCi
ΔCi: change in capacity (ΔCi is usually about 10% of C)
And
(Formula 3) = C1 + C2-C3-C4
= ΔC1 + ΔC2-ΔC3-ΔC4
≒ 0.2 × C ... (Formula 5)
(Formula 4) = 2 × C + ΔC1 + ΔC2
≈ 2 x C (Formula 6)
It becomes.

  In a touch sensor panel or the like, ΔCi is about 10% of C, so the value of (Expression 6) is about 10 times the value of (Expression 5). That is, the integration circuit that realizes (Equation 6) of Patent Document 2 must set the gain to about 1/10 as compared with the integration circuit of the present embodiment that realizes (Equation 5). The SN ratio is inferior. This difference in the SN ratio is further increased as the number M of drive lines is increased.

  In the present embodiment in which all the drive lines are always driven in parallel, the first drive line (C1, C2) and the second drive line ( This is different from the capacitance detection circuit described in Patent Document 2 that is distributed and driven to C3 and C4). In this embodiment, the offset due to the field-through of the reset switch can be measured by the output of the AD converter in a state where no signal is input to the drive line (a state where the signal is driven by the voltage Vref). Is subtracted in the digital circuit, the offset error can be canceled.

(Difference from prior art of positive and negative operations)
In the present embodiment, M drive lines are driven in parallel so as to be + V volts in the case of +1 and −V volts in the case of −1 in accordance with the value of the code sequence, which corresponds to (Equation 3). The values to be calculated are calculated at once. On the other hand, in the configuration described in Patent Document 2, C1 + C2 of (Equation 4) is calculated, and then an operation corresponding to C3 + C4 is performed. As described above, the configuration described in Patent Document 2 is disadvantageous in increasing the speed while suppressing power consumption because the calculation is performed in two phases.

  In the present embodiment, when the value of the code sequence is −1, the drive line is driven to be −V volts. However, the configuration described in Patent Document 2 only drives the drive line to + V volts. And is different in that there is no concept of driving to -V volts.

(Other configurations of the estimation unit 5)
In the present embodiment, analog integrators 6 respectively corresponding to L sense lines are arranged, these analog integrators 6 are switched by a switch 7, and an AD converter 8 and an inner product operation unit 9 are arranged one by one. Although an example of the configuration is shown, the present invention is not limited to this. One analog integrator 6 may be provided, and reading may be performed for each sense line by switching the input of the analog integrator 6.

  Further, the AD converter 8 may be provided for each sense line and analog integrator, and the switch 7 may be provided between the AD converter 8 and the inner product calculation unit 9.

(Configuration of other embodiment)
In the present embodiment, the example in which the capacitance value of the capacitance formed between the drive line and the sense line is detected has been described, but the present invention is not limited to this. For example, the present invention can be applied to a configuration for estimating the value of a linear element formed between a drive line and a sense line, and M inputs xk (k = 1,... The present invention can also be applied to a configuration that estimates the coefficient Ck corresponding to the kth input xk of the system having M) and linear input / output.

  Moreover, you may comprise the electronic device provided with the touch sensor system 1 described in this Embodiment, and the display panel arrange | positioned on the sensor panel 2 provided in the touch sensor system 1, and also, You may comprise the electronic device provided with the touch sensor system 1 and the display panel which incorporates the sensor panel 2 and has the function of the sensor panel 2. FIG.

(Embodiment 2)
(Driving method of sensor panel by two kinds of voltages)
FIG. 8 is a timing chart for explaining a method of driving a sensor panel provided in the touch sensor system according to the second embodiment.

  In the sensor panel driving method according to the first embodiment described above with reference to FIG. 4, the sensor panel is driven by three kinds of voltages Vref, (Vref + V), and (Vref−V). In this driving method, driving is performed by two kinds of voltages V1 and V2.

  That is, when the code sequence is +1, the drive line is driven by the voltage V1 when the analog integrator 6 (FIG. 1) is reset, and by the voltage V2 when sampling the output from the sense line to which each capacitance is coupled. When the code sequence is −1, the drive line is driven by the voltage V1 when the analog integrator 6 is reset, and by the voltage V1 when sampling the output from the sense line to which each capacitance is coupled.

  Specifically, in the example shown in FIG. 8, since the drive line DL1 has the corresponding elements d11 = + 1 and d12 = + 1 of the code sequence, the sampling is performed after being driven by the voltage V1 when the analog integrator 6 is reset. Sometimes driven by voltage V2, driven by voltage V1 at the next reset, and then driven by voltage V2 at the next sampling. Since the drive line DL2 has corresponding elements d21 = + 1 and d22 = −1 in the code series, after being driven by the voltage V1 when the analog integrator 6 is reset, it is driven by the voltage V2 at the time of sampling and at the time of the next reset. After being driven by the voltage V2, it is driven by the voltage V1 during the next sampling.

  Since the drive line DL3 has the corresponding elements d31 = −1 and d32 = −1 in the code sequence, it is driven by the voltage V2 when the analog integrator 6 is reset, and is then driven by the voltage V1 at the time of sampling. Sometimes it is driven by voltage V2, and then it is driven by voltage V1 at the next sampling. Since the drive line DL4 has corresponding elements d41 = −1 and d42 = + 1 in the code sequence, it is driven by the voltage V2 when the analog integrator 6 is reset, and is then driven by the voltage V1 at the time of sampling, and at the next reset. After being driven by the voltage V1, it is driven by the voltage V2 at the next sampling. Since the drive line DLM has corresponding elements dM1 = −1 and dM2 = + 1 of the code sequence, it is driven by the voltage V2 when the analog integrator 6 is reset, and then is driven by the voltage V1 at the time of sampling, and at the next reset. After being driven by the voltage V1, it is driven by the voltage V2 at the next sampling.

Here, V1 = Vdd, V2 = Vss
Then the output is
(Cf / Cint) × (V1−V2) = (Cf / Cint) × (Vdd−Vss)
And
In the sensor panel driving method according to the first embodiment described above with reference to FIG.
Vref = (Vdd−Vss) / 2,
If you say
Vdd = Vref + V,
Vss = Vref−V,
Because
V = (Vdd−Vss) / 2
Thus, the output is half that of the example shown in FIG. Therefore, according to the driving method of the second embodiment shown in FIG. 8, it is possible to obtain twice the signal intensity of the driving method of the first embodiment of FIG. 4, and double the charge accumulated in the capacitance. Can be.

(Offset read)
FIG. 9 is another timing chart for explaining a driving method of the sensor panel provided in the touch sensor system according to the second embodiment.

  Before driving the drive lines DL1 to DLM in parallel according to the mode shown in FIG. 4 or FIG. 8, as shown in FIG. 9, the drive lines DL1 to DLM are driven by the constant voltage Vref at the time of resetting and sampling. The signal is not input to the line, and the offset output value is read from the analog integrator 6 (FIGS. 1 and 2). The offset output value read from the analog integrator 6 is AD converted by the ADC 8. Next, the offset output value AD-converted by the ADC 8 is measured by the inner product calculation unit 9, and this offset output value is stored in the RAM 10 for each of the sense lines SL1 to SLL.

(Offset compensation method)
Thereafter, the drive lines DL <b> 1 to DLM are driven in parallel according to the mode shown in FIG. 4 or 8, and the output from the capacitance string is output to the analog integrator 6. The ADC 8 performs AD conversion on the output from the capacitance string output to the analog integrator 6 and supplies it to the inner product calculation unit 9. Next, the inner product calculation unit 9 subtracts the offset output value stored in the RAM 10 from the output from the capacitance string supplied by the ADC 8 for each of the sense lines SL1 to SLL, and is provided in the analog integrator 6. Cancel the offset due to the feedthrough of the reset switch.

  Note that the drive lines DL1 to DLM are driven by the constant voltage Vref at the time of resetting and sampling, the offset output value is read from the analog integrator 6, and the offset output value AD-converted by the ADC 8 is measured by the inner product calculation unit 9. Is repeated a plurality of times, a plurality of offset output values are measured, and the average offset output value in which the noise component contained in the offset is reduced is stored in the RAM 10 by averaging the plurality of offset output values. May be. The number of repetitions is, for example, 16 in the case of 60 Hz, and can be set to 100 in the case of 240 Hz.

(Embodiment 3)
(Analog integrator gain switching)
FIG. 10 is a diagram for explaining a driving method of the sensor panel according to the third embodiment. The same components as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof will not be repeated.

  An example in which the sensor panel 2 has four drive lines D11 to DL4 and four sense lines SL1 to SL4, and the code sequence is composed of a fourth-order Hadamard matrix generated by the Sylvester method. To do.

  The analog integrator 6A includes an operational amplifier whose one input is coupled to the reference voltage Vref, an integral capacitance of a capacitor Cint disposed between the output of the operational amplifier and the other input, and a parallel to the integral capacitance. Three other integration capacitors connected to each other, and three switches provided respectively between the three other integration capacitors and the output of the operational amplifier.

  The sum along the column direction of each element of the code sequence composed of the fourth-order Hadamard matrix generated by the Sylvester method is “4” in the first column and “0” in the second to fourth columns. . Therefore, when the drive line is driven by each element of the first column of this code sequence, the value of the output from the capacitance column is significantly larger than when driven by the second to fourth columns. The capacity of the analog integrator 6A may be exceeded, and the analog integrator 6A may be saturated.

  Therefore, when the drive line is driven by a column in which the sum of the elements of the code sequence along the column direction is large enough to saturate the analog integrator 6A, the analog integration is performed so as to prevent the analog integrator 6A from being saturated. The switch provided in the vessel 6A is switched from OFF to ON.

  In the Hadamard matrix generated by the Sylvester method, all the elements in the first column are always +1, and the sum of the elements in the column becomes significantly larger than the sum of the other columns, and the analog integrator 6A may be saturated. By switching the switch provided in the analog integrator 6A from off to on as described above and switching the gain of the analog integrator 6A, saturation of the analog integrator can be prevented.

  As described above, according to the third embodiment, since the gain of the analog integrator is switched according to the absolute value of the sum of the elements along the column direction of the code sequence, saturation of the analog integrator can be prevented. it can.

(Compensation by analog product gain switching inner product calculation unit gain switching)
The inner product calculation unit 9 corresponds to each drive line based on the inner product calculation of the digital value obtained by AD-converting the output from the capacitance string output to the analog integrator 6A whose gain can be switched and the code sequence. The capacitance value of the capacitance string to be estimated is estimated. Here, the inner product calculation unit 9 switches the weighting of the digital value according to the absolute value of the sum of each element along the column direction of the code sequence, and the gain of the analog integrator 6A and the gain by the weighting of the digital value Is constant for each column of the code sequence.

(Embodiment 4)
(Division of inner product calculation by multiple driving)
FIGS. 11A and 11B are diagrams for explaining a code sequence for driving the sensor panel according to the fourth embodiment.

  FIG. 11A shows a code sequence composed of a fourth-order Hadamard matrix generated by the Sylvester method. In this code sequence, as in the code sequence shown in FIG. 10, the sum along the column direction of each element is “4” in the first column and “0” in the second to fourth columns. . Therefore, when the drive line is driven by each element of the first column of this code sequence, the value of the output from the capacitance column is significantly larger than when driven by the second to fourth columns. The capacity of the analog integrator 6A may be exceeded, and the analog integrator 6A may be saturated.

  Therefore, as shown in FIG. 11 (b), (1, 1, 1, 1) in the first column of the code sequence is replaced with a column represented by (1, 1, 0, 0) and (0, 0 1 and 1), the four drive lines are driven four to five times, and the total “4” along the column direction of each element is “2”. ”And“ 2 ”, and the maximum value of the total sum along the column direction is reduced to“ 2 ”from“ 4 ”to prevent saturation of the analog integrator.

In Embodiment 4, an example of a code sequence composed of a fourth-order Hadamard matrix generated by the Sylvester method has been described, but the present invention is not limited to this. The present invention can be applied to code sequences composed of ^2n- order Hadamard matrices other than the fourth order, and to code sequences composed of arbitrary-order Hadamard matrices generated by methods other than the Sylvester method. The present invention can also be applied.

(Embodiment 5)
(Triangular drive method)
FIG. 12 is a diagram for explaining a code sequence for driving the sensor panel according to the fifth embodiment.

The sensor panel according to the fifth embodiment has a 2 ⁿ order (M <) generated by the Sylvester method for each of the capacitance columns formed between the M drive lines and the L sense lines. 2 ⁿ ) M drive lines are driven in parallel based on code sequences of code length N> M, which are constituted by +1 or −1 corresponding to each row of the 2 ⁿ ) Hadamard matrix and are orthogonal to each other. FIG. 12 shows an example of a code sequence of 13 rows × 16 columns corresponding to M (= 13) drive lines based on a 16th-order Hadamard matrix.

  FIG. 13 is a graph showing a method for driving the sensor panel. The horizontal axis indicates the position along the column direction of the N = 16 Hadamard matrix shown in FIG. The vertical axis represents the absolute value of the sum of each element along the column direction of the N = 16 Hadamard matrix.

  In the first column of the N = 16 Hadamard matrix, all the elements are 1, so that the position along the column direction (horizontal axis) and the absolute value of the sum of each element along the column direction (vertical axis) The relationship is represented by a linearly monotonically increasing line L1.

The 9th column of the N = 16 Hadamard matrix (column (2 ^(4-1) +1)) is all 1 from the 1st row to the 8th row, and all from the 9th row to the 16th row. Since −1, the relationship between the position along the column direction (horizontal axis) and the absolute value of the sum of the elements along the column direction (vertical axis) increases linearly and monotonically. It is represented by a line L2 that decreases to form a triangular mountain shape with a base length of 16 and a height of 8.

The fifth column ((2 ^4-1 -2 ^4-2 +1) column) of the N = 16 Hadamard matrix is all 1 from the first row to the fourth row, and the fifth row to the eighth row. All of the above are -1, all of the ninth to twelfth lines are 1, and all of the thirteenth to sixteenth lines are -1. Therefore, the relationship between the position along the column direction (horizontal axis) and the absolute value (vertical axis) of the sum of each element along the column direction is two triangular mountain shapes with a base length of 8 and a height of 4. It is represented by the line L3 to be formed. The 13th column (the (2 ^4-1 +2 ^4-2 +1) column) is also all 1 from the first row to the fourth row, and all -1 from the fifth row to the eighth row, Since the ninth to twelfth rows are all -1 and the thirteenth to sixteenth rows are all 1, it is similarly represented by a line L3 that forms two triangular mountain shapes.

  The third column, the seventh column, the eleventh column, and the fifteenth column are represented by a line L4 that forms four triangular mountain shapes having a base length of 4 and a height of 2. The second column, the fourth column, the sixth column, the eighth column, the tenth column, the twelfth column, the fourteenth column, and the sixteenth column have a triangular mountain shape with a base length of 2 and a height of 8 It is represented by a line L5 that is formed individually.

  Here, it is assumed that the threshold Num is a value at which the analog integrator 6 (FIG. 1) is saturated when the absolute value of the sum of the elements along the column direction of the code sequence exceeds this value. In the example shown in FIGS. 12 and 13, it is assumed that Num = 3. Assume that the drive line number M = 13.

  The second column, the fourth column, the sixth column, the eighth column, the tenth column, the twelfth column, the fourteenth column and the sixteenth column corresponding to the line L5, and the third column corresponding to the line L4, the second column As shown in FIG. 13, the seventh column, the eleventh column, and the fifteenth column do not exceed the threshold value Num = 3. Therefore, even if M = 13 drive lines are driven simultaneously, the analog integrator 6 Is not saturated.

  Since the first column corresponding to the line L1 exceeds the threshold value Num = 3, the drive line DL13 is driven four times by three drive lines in order from the first drive line based on the threshold value Num = 3. When the first column is divided and driven so as to be driven, the analog integrator 6 is not saturated.

  In general, after driving Num from the first drive line to the Num × [M / Num] th by [M / Num] times, the remaining number of remaining (M / Num) is calculated. Drive in parallel. Here, [x] is an integer part of x, and the same applies in the description to be described later.

  The ninth column corresponding to the line L2 exceeds the threshold Num = 3. In the ninth column corresponding to the line L2, first, the second to thirteenth rows of the drive line are driven in parallel by corresponding portions of the code series, and then the first row of the drive line is driven.

In general, the drive line is driven in parallel from the (2 ^n-1 − (M−2 ⁿ⁻¹ )) line = (2 ⁿ −M) line to the M line in the drive line. Num driving from the first line of the line to the (2 ^n-1 − (M−2 ⁿ⁻¹ )) line = (2 ⁿ −M) line [(2 ⁿ⁻¹ − ( M-2 ^n-1 ) -1) line / Num based on the line], and then the remaining ((2 ^n-1- (M-2 ^n-1 ) -1) line / Num) ) Are driven in parallel.

In the example shown in the fifth embodiment, since n = 4 and M = 13, the (2 ^n-1 − (M−2 ⁿ⁻¹ )) line = the 3rd line, but the 3rd to 13th lines. Even in parallel driving up to the row, the sum in the column direction of the code sequence is +1, which is 2 smaller than the threshold Num = 3. Therefore, even if the second to thirteenth rows are driven in parallel, the sum of the code sequences in the column direction is +2, which is still smaller than the threshold Num = 3. For this reason, the (2 ^n-1- (M-2 ^n-1 )) line is the third line, but considering the value of the threshold Num, (2 ^n-1- (M-2 ^n-1 )) ) Row = Select the second row as a row based on the third row, and drive the second to thirteenth rows in parallel.

  The fifth column and the thirteenth column corresponding to the line L3 exceed the threshold Num = 3. In the fifth and thirteenth columns corresponding to the line L3, first, the first to eighth rows of the drive line are simultaneously driven in parallel. Then, the 10th to 13th rows of the drive line are driven. Next, the ninth drive line is driven.

In general, first, the drive line from the first line to the (2 ^n-1 ) line is driven in parallel. Then, the drive line is driven in parallel from the line based on the ((2 ^n-1 +2 ^n-2 )-(M- (2 ^n-1 +2 ^n-2 ))) line of the drive line. Next, from the (2 ⁿ⁻¹ +1) th row of the drive line ((((2 ⁿ⁻¹ +2 ⁿ⁻² ) − (M− (2 ⁿ⁻¹ +2 ⁿ⁻² ))) based row) − 1) Drive up to the Num number of rows by [((((2 ^n-1 +2 ^n-2 )-(M- (2 ^n-1 +2 ^n-2 ))) based rows))- After (2 ^n-1 +1) / Num] iterations, the remaining rows based on ((((((2 ^n-1 +2 ^n-2 )-(M- (2 ^n-1 +2 ^n-2 )))) ))-(2 ^n-1 +1) / Num) is driven in parallel.

In the example shown in the fifth embodiment, since n = 4 and M = 13, the ((2 ^n-1 +2 ^n-2 )-(M- (2 ^n-1 +2 ^n-2 ))) line = Although the 11th row, even if the 11th to 13th rows are driven in parallel, the sum of the code sequences in the column direction is +1, which is 2 smaller than the threshold Num = 3. Therefore, even if the 10th to 13th rows are driven in parallel, the sum of the code sequences in the column direction is +2, which is still smaller than the threshold Num = 3. For this reason, the ((2 ^n-1 +2 ^n-2 )-(M- (2 ^n-1 +2 ^n-2 ))) line = 11th line, but considering the value of the threshold Num, (( 2 ^n-1 +2 ^n-2 )-(M- (2 ^n-1 +2 ^n-2 ))) line = 10th line is selected as a line based on the 11th line, and from the 10th line to the 13th line Are driven in parallel.

Next, a sensor panel driving method when the drive line number M is 12 or less will be described. First, the case of 8 <M ≦ 12 will be described. The driving method of the lines L1 and L2 is the same as the driving method described above. In the case of the line L3, first, the drive line from the first row to the (2 ^n-1 ) th row is driven simultaneously in parallel. The driveline ^{(2 n-1)} +1 row ^{(2 n-1) + Num} × [(M- (2 n-1)) / Num] th to drive Num pieces by up to [(M -(2 ^n-1 )) / Num] iterations, the remaining ((M- (2 ^n-1 )) / Num) remaining numbers are driven in parallel.

  Next, the case of 4 <M ≦ 8 will be described. The driving method of the line L1 is the same as the driving method of the line L1 described above. The driving method of the line L2 is the same as the driving method of the line L1 described above. The driving method of the line L3 is the same as the driving method of the line L2 when the number of drive lines M = 13 described above.

  In the case of M ≦ 4, the driving method of the line L1 is the same as the driving method of the line L1, and the driving method of the lines L2 and L3 is also the same as the driving method of the line L1.

Here, a sensor panel driving method when the threshold value Num = 1 is described. The drive line number M = 13. The driving method of the line L1, the line L2, and the line L3 is the same as the driving method when the threshold value Num = 3 described above. In the case of the line L4, first, the drive line from the first line _{to the} (2 ^n-1 +2 ^n-2 ) line is driven simultaneously in parallel. Then, from the (2 ^n-1 +2 ^n-2 ) + 1th to (2 ^n-1 +2 ^n-2 ) + Num × [(M− (2 ⁿ⁻¹ +2 ⁿ⁻² )) / Num] th of the drive line Is repeated [(M− (2 ⁿ⁻¹ +2 ^{n− 2} )) / Num] times, and then the remaining ((M− (2 ⁿ⁻¹ +2 ⁿ⁻² )) / Num is driven. ) Are driven in parallel.

When the order of the 2 ^{n -th} order (M <2 ⁿ ) Hadamard matrix increases and n> 4, the driving method may be the same as that described above.

Note that even if the relationship between the position along the column direction of the code sequence and the absolute value of the sum of the elements along the column direction is not the relationship shown in FIG. 13, the order of the rows of the code sequence is changed. Thus, the position of the code sequence along the column direction and the absolute value of the sum of the elements along the column direction are 2 ⁿ order (M <2 ⁿ ) generated by the Sylvester method having the relationship shown in FIG. When the Hadamard matrix can be obtained, the above driving method may be implemented by changing the order of the rows of the code sequence.

  In the first to fifth embodiments described above, an example in which drive lines are driven in parallel by orthogonal code sequences has been described, but the present invention is not limited to this. The drive line may be driven by a code sequence based on the M sequence.

(A) of FIG. 14 is a figure for demonstrating the code sequence based on the M series which concerns on embodiment. Code sequence d ₁ = (d ₁₁ , d ₁₂ ,..., D _1N ), d ₂ = (d ₂₁ , d ₂₂ ,..., D _2N ),..., DM = (d _M1 , d _M2 ,. , D _MN ) drive the first to M-th drive lines in parallel and have 1 or −1 elements, respectively, and code sequences d ₁ , d ₂ ,. If dM is a sequence obtained by cyclically shifting an M sequence having a length N (= 2 ⁿ −1), the condition shown in (Equation 8) in FIG. 14 is satisfied.

The “M sequence” is a kind of binary pseudorandom number sequence, and is composed of only binary values of 1 and −1 (or 1 and 0). The length of one period of the M sequence is 2 ⁿ −1. Examples of the M series of length = 2 ³ −1 = 7 include “1, −1, −1, 1, 1, 1, −1”. As an example of an M sequence of length = 2 ⁴ −1 = 15, “1, -1, −1, −1, 1, 1, 1, 1, −1, 1, −1, 1, 1, − 1, -1 ".

  FIG. 14B is a diagram illustrating a specific example of a code sequence based on the M sequence. The code sequence MCS based on the M sequence is a code sequence of 13 rows × 15 columns. The first line of the code sequence MCS is an M sequence “1, −1, −1, −1, 1, 1, 1, 1, −1, 1, −1, 1, 1, −1 of length = 15. -1 ". The second row of the code sequence MCS is an M sequence obtained by cyclically shifting the M sequence of the first row to the left by one digit, and the third row of the code sequence MCS is cyclically shifted by one digit to the left of the M sequence of the second row. M series. Similarly, the kth row of the code sequence MCS is an M sequence obtained by cyclically shifting the M sequence of the (k−1) th row to the left by one digit (2 ≦ k ≦ 13).

(Embodiment 6)
(Electronic device with touch sensor system)
FIG. 15 is a functional block diagram showing the configuration of the mobile phone 12 equipped with the touch sensor system 1. The mobile phone (electronic device) 12 includes a CPU 15, a RAM 17, a ROM 16, a camera 21, a microphone 18, a speaker 19, an operation key 20, a display panel 13, a display control circuit 14, and a touch sensor system 1. And. Each component is connected to each other by a data bus.

  The CPU 15 controls the operation of the mobile phone 12. The CPU 15 executes a program stored in the ROM 16, for example. The operation key 20 receives an instruction input by the user of the mobile phone 12. The RAM 17 volatilely stores data generated by execution of a program by the CPU 15 or data input via the operation keys 20. The ROM 16 stores data in a nonvolatile manner.

  The ROM 16 is a ROM capable of writing and erasing, such as an EPROM (Erasable Programmable Read-Only Memory) and a flash memory. Although not shown in FIG. 14, the mobile phone 12 may be configured to include an interface (IF) for connecting to another electronic device by wire.

  The camera 21 captures a subject in accordance with the operation of the operation key 20 by the user. The image data of the photographed subject is stored in the RAM 17 or an external memory (for example, a memory card). The microphone 18 receives an input of a user's voice. The mobile phone 12 digitizes the input voice (analog data). Then, the cellular phone 12 sends the digitized voice to a communication partner (for example, another cellular phone). The speaker 19 outputs sound based on, for example, music data stored in the RAM 17.

  The touch sensor system 1 includes a sensor panel 2 and an integrated circuit 3. The CPU 15 controls the operation of the touch sensor system 1. For example, the CPU 15 executes a program stored in the ROM 16. The RAM 17 stores data generated by the execution of the program by the CPU 15 in a volatile manner. The ROM 16 stores data in a nonvolatile manner.

  The display panel 13 displays images stored in the ROM 16 and the RAM 17 by the display control circuit 14. The display panel 13 is superimposed on the sensor panel 2 or contains the sensor panel 2.

(Embodiment 7)
(Configuration of touch sensor system)
FIG. 16 is a schematic diagram illustrating a configuration of the touch sensor system 101 according to the seventh embodiment. The touch sensor system 101 includes a touch panel 102. The touch panel 102 is disposed so as to overlap the display panel 109. The touch panel 102 has a size of about 80 inches, for example, and is a large touch panel that can be disposed on the surface of the board of the electronic blackboard system. The touch panel 102 may be built in the display panel 109.

  On the surface of the touch panel 102, a two-dimensional region 112 including a rectangular hand region (partial region) 113 (also referred to as a hand pad) and a remaining region 114 other than the hand region 113 is disposed.

  FIG. 17 is a diagram showing a hand-held area 113 set on the touch panel 102. The hand region 113 has a rectangular shape, and surrounds the region 116d of the hand that touches the touch panel 102 and the region 117 where the finger touches the touch panel 102, and the pen that the hand grips touches the touch panel 102. The input area 118 is set to be arranged outside the hand-held area 113. As described above, the hand-held region 113 is formed so as to surround the region 116d where the hand holding the input pen is put on.

  The touch panel 102 includes a plurality of drive lines (not shown) arranged in parallel with each other in the horizontal direction, a plurality of sense lines (not shown) arranged in parallel with each other in the vertical direction, a plurality of drive lines, and a plurality of sense lines. A plurality of capacitances (not shown) formed respectively at the intersecting portions are provided.

  The touch sensor system 101 is provided with a control circuit 115. The control circuit 115 includes a driver 105 and a sense amplifier 106. The driver 105 is driven by applying a voltage to a plurality of drive lines, and supplies electric charges to the capacitance. The sense amplifier 106 reads out the linear sum of the electric charges accumulated in the capacitance for each sense line and supplies it to the AD converter 107.

  The AD converter 107 performs AD conversion on the linear sum of the charges accumulated in the capacitance and supplies the result to the decoding unit 108. The decoding unit 108 decodes the linear sum of the charges supplied from the AD converter 107 to obtain the capacitance distribution, and the touched area touch signal corresponding to the touch of the two-dimensional area 112 of the touch panel 102 to the touched area 113. (Partial area touch signal) is generated and supplied to the hand-held area processing unit 103 (first processing means), and a drawing signal (residual area touch signal) corresponding to a touch on the remaining area 114 is generated to generate a drawing input processing unit. 104 (second processing means). The drawing signal is typically a signal for drawing and inputting characters.

  The drawing input processing unit 104 executes processing based on the drawing input to the remaining area 114 of the two-dimensional area 112 based on the drawing signal supplied from the decoding unit 108.

  The hand area processing unit 103 executes processing related to movement of the hand area 113 or change in the size of the hand area 113 based on the hand area touch signal supplied from the decoding unit 108.

  In this way, a hand area 113 that is not handled as a pen input signal (drawing signal) even if the touch panel 102 is touched is defined, and only a signal touched on the remaining area 114 other than the hand area 113 is handled as a pen input signal. With this configuration, it is possible to prevent the possibility that a signal based on an intended pen input input to the remaining area 114 is erroneously recognized as a signal based on an unintended touch input input to the hand-held area 113.

(How to set the hand area)
FIGS. 18A and 18B and FIGS. 19A and 19B are diagrams illustrating an example of a user setting method for the touched area 113. The control circuit 115 is provided with a hand-held area setting unit 110.

  Referring to (a) of FIG. 18, when the touched pad menu 119 on the screen of the application software displayed on the display panel 109 is touched and the touched finger is moved to the center of the screen, the touched area setting unit 110 is touched. The display position of the area 113 is moved to the center of the screen. Then, as shown in FIG. 18B, when the four corners of the hand-held area 113 moved to the center of the screen are touched, the hand-held area setting unit 110 changes the size of the hand-held area 113 according to the touch mode. . Further, as shown in FIG. 19A, when the center of the hand-held area 113 displayed on the display panel 109 is touched and the finger is moved while touching, the hand-held area setting unit 110 responds to the movement of the finger. The display position of the hand-held area 113 is changed.

  As described above, the hand-held area 113 can be set by a touch operation from the application software menu displayed on the display panel 109, and the position and size of the hand-held area 113 can be changed by the touch operation.

  As illustrated in FIG. 19B, the hand-held area setting unit 110 moves the hand that has touched the input pen corresponding to the pen input locus 120 and touched the touch panel so that handwriting input with the pen can be easily performed. The hand-held area 113 may be moved so as to follow. For this purpose, for example, the center of gravity of the region 116d (FIG. 17) where the touch signal is generated in the hand-held region 113 may be obtained, and the hand-held region 113 may be moved so as to follow the movement of the center of gravity.

  Further, an automatic setting unit (automatic setting means) 111 that automatically sets the position and size of the hand-held area 113 based on the hand-touch area touch signal and the drawing signal may be provided in the control circuit 115.

  In addition, you may comprise so that the region 113 with a handle may be defined. This is because a large screen touch sensor system performs pen input by a plurality of users.

  In this embodiment, an example of a capacitive touch sensor system is shown, but the present invention is not limited to this. The present invention can also be applied to touch sensor systems other than the capacitive type. For example, the present invention can be applied to an electromagnetic induction type touch sensor system.

  Moreover, although the example of the rectangular hand-shaped area | region 113 was shown, this invention is not limited to this. The hand region 113 may have a shape other than a rectangular shape such as a circle, an ellipse, or a triangle.

  In addition to the drawing input processing unit 104, a menu selection processing unit for processing a touch signal for selecting a menu displayed in the remaining area 114, and a touch signal for moving an icon displayed in the remaining area 114. You may provide the icon movement process part to process as a 2nd process means prescribed | regulated to a claim. A blackboard eraser functioning as a blackboard eraser (or eraser) is provided in the two-dimensional area 112 of the touch panel 102 as a partial area defined in the claims, instead of or in addition to the handheld area 113. A blackboard erase processing unit that performs a function as a blackboard eraser of the blackboard eraser area based on a signal from the blackboard eraser area may be provided as a first processing means that defines the claims.

  The signal corresponding to the touch on the remaining area 114 (residual area touch signal) includes at least one of a drawing signal generated by the pen and a touch signal generated by the finger. The drawing signal generated by the pen includes a signal generated based on an operation of drawing a character in the residual area 114 with a pen, a signal generated based on an operation of selecting a menu displayed in the residual area 114, and a residual And a signal generated based on an operation of selecting or moving an icon displayed in the area 114 with a pen. The touch signal generated by the finger includes a signal generated based on an operation of drawing a character with the finger in the remaining area 114, a signal generated based on an operation of selecting a menu displayed in the remaining area 114 with the finger, And a signal generated based on an operation of selecting or moving an icon displayed in the region 114 with a finger.

  The linear system coefficient estimation method according to the present invention is a system having M inputs Xk (k = 1,..., M) and linear inputs and outputs.

On the other hand, based on M code sequences di = (di1, di2,..., DiN) (i = 1,..., M) orthogonal to length N, the M inputs Xk (k = 1,. , M) and N outputs s = (s1, s2,..., SN) = (F (d11, d21,..., DM1), F (d12, d22,..., DM2),. (D1N, d2N,..., DMN))
An estimation step of estimating a coefficient Ck corresponding to the k-th input Xk based on an inner product operation of the output s and the code sequence di.

  With this feature, the M inputs Xk (k = 1,..., M) based on M code sequences di = (di1, di2,..., DiN) (i = 1,. , M) and N outputs s = (s1, s2,..., SN) = (F (d11, d21,..., DM1), F (d12, d22,..., DM2),. (D1N, d2N,..., DMN)) is output, and all of the M inputs are simultaneously input to estimate the linear system coefficient Ck. Accordingly, unlike the conventional configuration, it is not necessary to select and input M inputs one by one, and even if the number of inputs M increases, the processing time for acquiring the coefficient value of the linear system is short. In addition, it is possible to obtain a linear system coefficient estimation method capable of maintaining high detection accuracy, good resolution, and high-speed operation.

  Another linear system coefficient estimation method according to the present invention includes a first system and a second system having M inputs Xk (k = 1,..., M) and linear inputs and outputs.

.., DiN) (i = 1,..., M), and the M inputs Xk (k = 1). ,..., M) and N outputs from the first system sFirst = (s11, s12,..., S1N) = (F1 (d11, d21,..., DM1), F1 (d12, d22) ,..., DM2),..., F1 (d1N, d2N,..., DMN)) and N outputs from the second system sSecond = (s21, s22,..., S2N) = (F2 (d11, , dM1), F2 (d12, d22,..., dM2),..., F2 (d1N, d2N,..., dMN)), and inner product operation of the output sFirst and the code sequence di The first corresponding to the k1th input Xk An estimation step of estimating a coefficient C2k of the second system corresponding to the k2th input Xk based on an inner product operation of the output sSecond and the code sequence di. It is characterized by that.

  Due to this characteristic, the M inputs xk (k = 1,..., M) based on M code sequences di = (di1, di2,..., DiN) (i = 1,. , M) and N outputs from the first system sFirst = (s11, s12,..., S1N) = (F1 (d11, d21,..., DM1), F1 (d12, d22,. , DM2),..., F1 (d1N, d2N,..., DMN)) and N outputs from the second system sSecond = (s21, s22,..., S2N) = (F2 (d11, d21, .., DM1), F2 (d12, d22,..., DM2),..., F2 (d1N, d2N,..., DMN)) are output simultaneously. Estimate C1k and the second system coefficient C2k. Therefore, unlike the conventional configuration, it is not necessary to select and input M inputs one by one, and the coefficient values of the first and second systems are obtained even when the number of inputs M increases. Thus, it is possible to obtain a linear system coefficient estimation method capable of high-speed operation while maintaining good detection accuracy and good resolution.

  The linear element array value estimation method according to the present invention includes a first linear element array C1i (i = 1,..., M) formed between M drive lines and one sense line, and the M M codes orthogonal to each other in length N for each of the second linear element rows C2i (i = 1,..., M) formed between one drive line and another sense line Based on the series di = (di1, di2,..., DiN) (i = 1,..., M), the M drive lines are driven in parallel, and N pieces from the first linear element array are driven. An output step of outputting an output sFirst = (s11, s12,..., S1N), and N outputs sSecond = (s21, s22,..., S2N) from the second linear element array, and the output sFirst Based on the inner product operation with the code sequence di, the k1 th A value of a linear element of the first linear element array corresponding to the live line is estimated, and the second linear corresponding to the k2nd drive line is calculated based on an inner product operation of the output sSecond and the code sequence di. And an estimation step of estimating a value of a linear element of the element array.

  Due to this feature, the M drive lines are driven in parallel on the basis of M code sequences of length N orthogonal to each other, di = (di1, di2,..., DiN) (i = 1,..., M). N outputs from the first linear element array sFirst = (s11, s12,..., S1N), and N outputs from the second linear element array sSecond = (s21, s22,. , S2N) are output to the M drive lines at the same time, and the values of the linear elements of the first linear element array and the linear elements of the second linear element array are estimated. Therefore, unlike the conventional configuration, it is not necessary to select and drive M drive lines one by one, and the values of the linear elements of the first linear element array and the linear elements of the second linear element array are eliminated. It is possible to obtain a linear system coefficient estimation method that requires a long processing time for acquiring a value, maintains a good detection accuracy, has a good resolution, and can operate at high speed.

  The capacitance detection method according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and the M Each element is configured by +1 or −1 for each of the second capacitance columns C2i (i = 1,..., M) formed between one drive line and another sense line. Based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N, the code sequence is + V volts when the code sequence is +1, In this case, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = (s11, s12,..., S1N) from the first capacitance string, and the first SSecond = (s21, s22,... s2N) is output, and based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the output an estimation step of estimating a capacitance value of the second capacitance string corresponding to the k2nd drive line based on an inner product operation of sSecond and the code sequence di.

  With this feature, the code sequence based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. When the value of +1 is + V volts, and in the case of −1, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = ( s11, s12,..., s1N), and the output sSecond = (s21, s22,..., s2N) from the second capacitance row, so that all are input to the M drive lines simultaneously, A capacitance value of the first capacitance string corresponding to the k1th drive line and a capacitance value of the second capacitance string corresponding to the k2th drive line are estimated. Therefore, unlike the conventional configuration, it is not necessary to select and scan and input M drive lines one by one, and the capacitance value of the first capacitance column corresponding to the k1th drive line and k2 The processing time for acquiring the capacitance value of the second capacitance row corresponding to the second drive line is lengthened, the detection accuracy is kept good, the resolution is good, and the high-speed operation is possible. A capacitance detection method can be obtained.

  In addition, since all M drive lines are driven in parallel at + V volts or −V volts according to the code sequence, the drive line is divided and driven according to the code sequence. As a result, the amount of information included in the output signal from the capacitance string increases, and the SN ratio also improves. Furthermore, compared with the configuration described in Patent Document 2 that performs a two-phase operation, the calculation is further completed, which is advantageous for speeding up.

  The integrated circuit according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, and the M drives. A length in which each element is constituted by +1 or −1 for each of the second capacitance columns C2i (i = 1,..., M) formed between the line and one other sense line N orthogonal code sequences di = (di1, di2,..., DiN) (i = 1,..., M), + V volts when the code sequence is +1, and − when the code sequence is −1. The M drive lines are driven in parallel so as to apply V volts, and the output from the first capacitance string sFirst = (s11, s12,..., S1N), and the second static Output from the capacitance string sSecond = (s21, s22,..., S2N) Based on the driving unit to output, and the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the output sSecond and the output And an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on an inner product calculation with the code sequence di.

  With this feature, the code sequence based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. When the value of +1 is + V volts, and in the case of −1, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = ( s11, s12,..., s1N) and the output sSecond = (s21, s22,..., s2N) from the second capacitance string are output simultaneously, so that all the M drive lines are input simultaneously. A capacitance value of the first capacitance string corresponding to the k1th drive line and a capacitance value of the second capacitance string corresponding to the k2th drive line are estimated. Therefore, unlike the conventional configuration, it is not necessary to select and scan and input M drive lines one by one, and the capacitance value of the first capacitance column corresponding to the k1th drive line and k2 The processing time for estimating the capacitance value of the second capacitance row corresponding to the second drive line is lengthened, the detection accuracy is kept good, the resolution is good, and the high-speed operation is possible. An integrated circuit used for the capacitance detection method can be obtained.

  In addition, since all M drive lines are driven in parallel at + V volts or −V volts according to the code sequence, the drive line is divided and driven according to the code sequence. As a result, the amount of information included in the output signal from the capacitance string increases, and the SN ratio also improves. Furthermore, compared with the configuration described in Patent Document 2 that performs a two-phase operation, the calculation is further completed, which is advantageous for speeding up.

  The touch sensor system according to the present invention includes a first capacitance column C1i (i = 1,..., M) formed between M drive lines and one sense line, A sensor panel including a second capacitance column C2i (i = 1,..., M) formed between the drive line and another sense line; and an integrated circuit for controlling the sensor panel. The integrated circuit includes the first capacitance column C1i (i = 1,..., M) and the second capacitance column C2i (i = 1,...). For each of M), based on an orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N, each element consisting of +1 or -1. , If the code sequence is +1, + V volts, if it is -1, -V The M drive lines are driven in parallel so as to apply a fault, and an output sFirst = (s11, s12,..., S1N) from the first capacitance string, and the second electrostatic capacitance Based on the inner product operation of the output sFirst and the code sequence di based on the drive unit that outputs the output sSecond = (s21, s22,..., S2N) from the capacitor string, the first corresponding to the k1st drive line The capacitance value of the second capacitance string corresponding to the k2th drive line is estimated based on the inner product calculation of the output sSecond and the code sequence di. And an estimation unit.

  With this feature, the code sequence based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. When the value of +1 is + V volts, and in the case of −1, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = ( s11, s12,..., s1N) and the output sSecond = (s21, s22,..., s2N) from the second capacitance string are output simultaneously, so that all the M drive lines are input simultaneously. A capacitance value of the first capacitance string corresponding to the k1th drive line and a capacitance value of the second capacitance string corresponding to the k2th drive line are estimated. Therefore, unlike the conventional configuration, it is not necessary to select and scan and input M drive lines one by one, and the capacitance value of the first capacitance column corresponding to the k1th drive line and k2 The processing time for estimating the capacitance value of the second capacitance row corresponding to the second drive line becomes longer, and the touch with high detection speed and good resolution while maintaining good detection accuracy. A sensor system can be obtained.

  In addition, since all M drive lines are driven in parallel at + V volts or −V volts according to the code sequence, the drive line is divided and driven according to the code sequence. As a result, the amount of information included in the output signal from the capacitance string increases, and the SN ratio also improves. Furthermore, compared with the configuration described in Patent Document 2 that performs a two-phase operation, the calculation is further completed, which is advantageous for speeding up.

  An electronic apparatus according to the present invention includes the touch sensor system according to the present invention, and a display panel that is disposed so as to overlap with a sensor panel provided in the touch sensor system or that includes the sensor panel. It is characterized by.

  With this feature, the code sequence based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. When the value of +1 is + V volts, and in the case of −1, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = ( s11, s12,..., s1N) and the output sSecond = (s21, s22,..., s2N) from the second capacitance string are output simultaneously, so that all the M drive lines are input simultaneously. A capacitance value of the first capacitance string corresponding to the k1th drive line and a capacitance value of the second capacitance string corresponding to the k2th drive line are estimated. Therefore, unlike the conventional configuration, it is not necessary to select and scan and input M drive lines one by one, and the capacitance value of the first capacitance column corresponding to the k1th drive line and k2 The processing time for estimating the capacitance value of the second capacitance row corresponding to the second drive line becomes longer, and the touch with high detection speed and good resolution while maintaining good detection accuracy. An electronic device including a sensor system can be obtained.

  In addition, since all M drive lines are driven in parallel at + V volts or −V volts according to the code sequence, the drive line is divided and driven according to the code sequence. As a result, the amount of information included in the output signal from the capacitance string increases, and the SN ratio also improves. Furthermore, compared with the configuration described in Patent Document 2 that performs a two-phase operation, the calculation is further completed, which is advantageous for speeding up.

  The capacitance detection method according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M Each element is configured by +1 or −1 for each of the second capacitance columns Ci2 (i = 1,..., M) formed between one drive line and one other sense line. The M drive lines are driven in parallel based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. SFirst = (s11, s12,..., S1N) and the output sSecond = (s21, s22,... S2N) from the second capacitance string are output to the analog integrator. Output step, the output sFirst and the code sequence di The capacitance value of the first capacitance string corresponding to the k1th drive line is estimated based on the inner product calculation of the k1th drive line, and the k2nd drive based on the inner product calculation of the output sSecond and the code sequence di An estimation step of estimating a capacitance value of the second capacitance row corresponding to the line, wherein the output step is expressed by Vref volts when the analog integrator is reset. When the M drive lines are driven by the first voltage and the output from the first and second capacitance columns is sampled, if the code sequence is +1, the Vth is represented by (Vref + V) volts. When the code sequence is −1 by two voltages, the M drive lines are driven by a third voltage expressed by (Vref−V) volts.

  With the above feature, the drive lines can be driven in parallel with a simple configuration based on the code sequence.

  The capacitance detection method according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M Each element is configured by +1 or −1 for each of the second capacitance columns Ci2 (i = 1,..., M) formed between one drive line and one other sense line. The M drive lines are driven in parallel based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. SFirst = (s11, s12,..., S1N) and the output sSecond = (s21, s22,... S2N) from the second capacitance string are output to the analog integrator. Output step, the output sFirst and the code sequence di The capacitance value of the first capacitance string corresponding to the k1th drive line is estimated based on the inner product calculation of the k1th drive line, and the k2nd drive based on the inner product calculation of the output sSecond and the code sequence di An estimation step of estimating a capacitance value of the second capacitance string corresponding to a line, wherein the output step includes the analog step when the code sequence is +1. When the integrator is reset, the drive line is driven by the first voltage when the output from the first and second capacitance strings is sampled, and when the code sequence is −1, The drive line is driven by the second voltage when the integrator is reset, and by the first voltage when the output from the first and second capacitance strings is sampled. That.

  With the above characteristics, higher signal intensity can be obtained, and the charge accumulated in the capacitance can be increased.

  The capacitance detection method according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M Each element is configured by +1 or −1 for each of the second capacitance columns Ci2 (i = 1,..., M) formed between one drive line and one other sense line. The M drive lines are driven in parallel based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. SFirst = (s11, s12,..., S1N) and the output sSecond = (s21, s22,... S2N) from the second capacitance string are output to the analog integrator. Output step, the output sFirst and the code sequence di The capacitance value of the first capacitance string corresponding to the k1th drive line is estimated based on the inner product calculation of the k1th drive line, and the k2nd drive based on the inner product calculation of the output sSecond and the code sequence di An estimation step of estimating a capacitance value of the second capacitance row corresponding to a line, before the output step, when the analog integrator is reset, and Driving the drive line with a first voltage when sampling the output from the first and second capacitance strings, and outputting the outputs from the first and second capacitance strings to the analog integrator; The outputs from the first and second capacitance arrays are read from the analog integrator as offset outputs and stored in a memory.

  With the above feature, the offset caused by the analog integrator can be canceled.

  The integrated circuit according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M drives. For each of the second capacitance columns Ci2 (i = 1,..., M) formed between the line and one other sense line, each element is constituted by +1 or −1 .., DiN) (i = 1,..., M), the M drive lines are driven in parallel, and the first electrostatic A drive unit that outputs the output sFirst = (s11, s12,..., S1N) from the capacitance string and the output sSecond = (s21, s22,... S2N) from the second capacitance string to the analog integrator. And the inner product of the output sFirst and the code sequence di Is used to estimate the capacitance value of the first capacitance string corresponding to the k1st drive line, and corresponds to the k2th drive line based on the inner product calculation of the output sSecond and the code sequence di. And an estimation unit that estimates a capacitance value of the second capacitance string, wherein the driving unit is configured to reset the analog integrator when the code sequence is +1. When the output from the first and second capacitance strings is sampled by one voltage, the drive line is driven by a second voltage. When the code sequence is −1, the analog integrator is reset when the analog integrator is reset. The drive line is driven by the first voltage when sampling the output from the first and second capacitance arrays by the second voltage.

  With the above characteristics, higher signal intensity can be obtained, and the charge accumulated in the capacitance can be increased.

  The integrated circuit according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M drives. For each of the second capacitance columns Ci2 (i = 1,..., M) formed between the line and one other sense line, each element is constituted by +1 or −1 .., DiN) (i = 1,..., M), the M drive lines are driven in parallel, and the first electrostatic A drive unit that outputs the output sFirst = (s11, s12,..., S1N) from the capacitance string and the output sSecond = (s21, s22,... S2N) from the second capacitance string to the analog integrator. And the inner product of the output sFirst and the code sequence di Is used to estimate the capacitance value of the first capacitance string corresponding to the k1st drive line, and corresponds to the k2th drive line based on the inner product calculation of the output sSecond and the code sequence di. And an estimation unit that estimates a capacitance value of the second capacitance string, wherein the drive unit outputs outputs from the first and second capacitance strings to the analog integrator. Before driving the drive line with the first voltage when the analog integrator is reset and when the output from the first and second capacitance columns is sampled. The output from the capacitance string is output to the analog integrator, and the outputs from the first and second capacitance strings are read from the analog integrator as offset outputs and stored in the memory. To.

  With the above feature, the offset caused by the analog integrator can be canceled.

  The touch sensor system according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M number of the capacitance lines. A sensor panel including a second capacitance column Ci2 (i = 1,..., M) formed between the drive line and another sense line; and an integrated circuit for controlling the sensor panel. The integrated circuit includes the first capacitance row Ci1 (i = 1,..., M) and the second capacitance row Ci2 (i = 1,...). For each of M), based on an orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N, each element consisting of +1 or -1. , Driving the M drive lines in parallel to form the first capacitance row Output sFirst = (s11, s12,..., S1N) and an output sSecond = (s21, s22,..., S2N) from the second capacitance string to an analog integrator; Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di And an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation, and the drive unit is configured such that when the code sequence is +1, Driving the drive line with a first voltage when the analog integrator is reset and with a second voltage when sampling the outputs from the first and second capacitance strings; When the analog integrator is reset, the drive line is driven by the second voltage when the analog integrator is reset and by the first voltage when the outputs from the first and second capacitance columns are sampled. Features.

  With the above characteristics, higher signal intensity can be obtained, and the charge accumulated in the capacitance can be increased.

  The touch sensor system according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M number of the capacitance lines. A sensor panel including a second capacitance column Ci2 (i = 1,..., M) formed between the drive line and another sense line; and an integrated circuit for controlling the sensor panel. The integrated circuit includes the first capacitance row Ci1 (i = 1,..., M) and the second capacitance row Ci2 (i = 1,...). For each of M), based on an orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N, each element consisting of +1 or -1. , Driving the M drive lines in parallel to form the first capacitance row Output sFirst = (s11, s12,..., S1N) and an output sSecond = (s21, s22,..., S2N) from the second capacitance string to an analog integrator; Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di And an estimation unit that estimates a capacitance value of the second capacitance row corresponding to the k2nd drive line based on the calculation, and the driving unit includes the first and second capacitances. Before outputting the output from the string to the analog integrator, when the analog integrator is reset and when sampling the output from the first and second capacitance strings, the first voltage causes the The live line is driven, the outputs from the first and second capacitance strings are output to the analog integrator, and the outputs from the first and second capacitance strings are used as the offset output to the analog It is characterized by being read from the integrator and stored in a memory.

  With the above feature, the offset caused by the analog integrator can be canceled.

  An electronic apparatus according to the present invention includes the touch sensor system according to the present invention, and a display panel that is disposed so as to overlap with a sensor panel provided in the touch sensor system or that includes the sensor panel. It is characterized by.

  The capacitance detection method according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M Each element is configured by +1 or −1 for each of the second capacitance columns Ci2 (i = 1,..., M) formed between one drive line and one other sense line. Based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N, the code sequence is + V volts when the code sequence is +1, In this case, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = (s11, s12,..., S1N) from the first capacitance string, and the first SSecond = (s21, s22,... 2N) is output to the analog integrator, and the capacitance value of the first capacitance string corresponding to the k1st drive line is estimated based on the inner product operation of the output sFirst and the code sequence di. And an estimation step of estimating a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the inner product calculation of the output sSecond and the code sequence di. In the method, the output step switches a gain of the analog integrator according to an absolute value of a sum of each element along a column direction of the code sequence in order to prevent saturation of the analog integrator. It is characterized by that.

  With the above feature, saturation of the analog integrator can be avoided.

  The capacitance detection method according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M Each element is configured by +1 or −1 for each of the second capacitance columns Ci2 (i = 1,..., M) formed between one drive line and one other sense line. Based on the orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,..., M) of length N, the code sequence is + V volts when the code sequence is +1, In this case, the M drive lines are driven in parallel so as to apply −V volts, and the output sFirst = (s11, s12,..., S1N) from the first capacitance string, and the first SSecond = (s21, s22,... 2N) is output to the analog integrator, and the capacitance value of the first capacitance string corresponding to the k1st drive line is estimated based on the inner product operation of the output sFirst and the code sequence di. And an estimation step of estimating a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the inner product calculation of the output sSecond and the code sequence di. In the method, in the output step, in order to prevent saturation of the analog integrator, a plurality of code sequence columns are converted into a plurality of code sequence columns according to an absolute value of a sum of elements along the code sequence column direction. The driving of the M drive lines is divided into a plurality of times by dividing into rows.

  With the above feature, saturation of the analog integrator can be avoided.

The capacitance detection method according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between (M = 2 ⁿ ) drive lines and one sense line. , And for each of the second capacitance columns Ci2 (i = 1,..., M) formed between the (M = 2 ⁿ ) drive lines and the other sense line. A code sequence of code length N = M, which is composed of +1 or −1 corresponding to each row of a 2 ^{n -th} order Hadamard matrix generated by the sylvester method and orthogonal to each other, di = (di1, di2, .., DiN) (i = 1,..., M), the M drive lines are applied to apply + V volts when the code sequence is +1 and −V volts when the code sequence is −1. Driving in parallel, the output sF from the first capacitance string rst = (s11, s12,..., s1N) and an output step of outputting an output sSecond = (s21, s22,..., s2N) from the second capacitance string to an analog integrator, and the output sFirst And the code sequence di to estimate the capacitance value of the first capacitance string corresponding to the k1th drive line, and based on the dot product calculation of the output sSecond and the code sequence di And an estimation step of estimating a capacitance value of the second capacitance row corresponding to the k2th drive line, wherein the output step includes saturation of the analog integrator. In order to prevent this, the first column of the code sequence is divided into a plurality of columns, and the drive corresponding to the first column of the code sequence is divided into a plurality of times.

  With the above feature, saturation of the analog integrator can be avoided.

The capacitance detection method according to the present invention includes a first capacitance column Ci1 (i = 1,..., M) formed between M drive lines and one sense line, and the M Each of the second capacitance columns Ci2 (i = 1,..., M) formed between one drive line and another sense line is generated by a sylvester method. A code sequence di = (di1, di2,..., DiN) composed of +1 or -1 corresponding to each row of a 2 ^nth- order (M <2 ⁿ ) Hadamard matrix and orthogonal to each other. Based on (i = 1,..., M), the M drive lines are driven in parallel so that + V volts is applied when the code sequence is +1 and −V volts is applied when the code sequence is −1. Output sFirst from the first capacitance string (S11, s12,..., S1N) and an output step of outputting an output sSecond = (s21, s22,..., S2N) from the second capacitance string to an analog integrator, and the output sFirst and the Based on the inner product operation with the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and based on the inner product operation between the output sSecond and the code sequence di, a capacitance detection method including an estimation step of estimating a capacitance value of the second capacitance column corresponding to the k2nd drive line, wherein the output step is along a column direction of the code sequence. Further, a column in which the absolute value of the sum of each element exceeds a threshold value Num relating to the saturation of the analog integrator is decomposed into a plurality of columns, and a drive corresponding to a column exceeding the threshold value Num in the code sequence is combined. It is divided into several times.

With the above feature, the saturation of the analog integrator can be avoided in driving with a 2 ^{n -th} order (M <2 ⁿ ) Hadamard matrix.

  The linear system coefficient estimation method according to the present invention is based on M code sequences di = (di1, di2,..., DiN) (i = 1,. xk (k = 1,..., M) and N outputs s = (s1, s2,..., sN) = (F (d11, d21,..., dM1), F (d12, d22,...) , DM2),..., F (d1N, d2N,..., DMN)) are output simultaneously, and the coefficients Ck of the linear system are estimated by inputting all the M inputs simultaneously. Accordingly, unlike the conventional configuration, it is not necessary to select and input M inputs one by one, and even if the number of inputs M increases, the processing time for acquiring the coefficient value of the linear system is short. In addition, there is an effect that it is possible to obtain a linear system coefficient estimation method capable of high-speed operation with good resolution while maintaining good detection accuracy.

  A touch sensor system according to the present invention includes a touch panel having a two-dimensional area including one or more partial areas and a remaining area other than the partial area, and a partial area touch corresponding to a touch on the partial area. First processing means for executing a first process based on the signal, and a second process for performing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area. And 2 processing means.

  With this feature, the first process is executed based on the partial area touch signal corresponding to the touch on the partial area, and is different from the first process based on the residual area touch signal corresponding to the touch on the residual area. The second process is executed. For this reason, it is possible to carry out a process in which a signal based on an unintended touch input input to the partial region and a signal based on the intended touch input input to the remaining region are treated separately. As a result, it is possible to provide a touch sensor system in which there is no possibility that a signal based on an unintended touch input input to the partial area is erroneously recognized as a signal based on an intended pen input input to the remaining area.

  The touch sensor system according to the present invention includes a first processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area, and a residual area touch corresponding to the touch on the residual area. Since the second processing means for executing the second processing different from the first processing based on the signal is provided, the signal based on the unintended touch input input to the partial region and the residual region are input. In other words, the processing based on the intended touch input can be performed separately. As a result, it is possible to provide a touch sensor system in which there is no possibility that a signal based on an unintended touch input input to the partial area is erroneously recognized as a signal based on an intended pen input input to the remaining area.

  In the linear element sequence value estimation method according to the present embodiment, each element of the code sequence di = (di1, di2,..., DiN) (i = 1,..., M) is configured by + V or −V. It is preferable.

  With the above configuration, each drive line can be driven by applying a voltage of + V volts or -V volts.

  In the capacitance detection method according to the present embodiment, it is preferable that the estimation step performs addition / subtraction according to the sign, which is necessary for the inner product, for each parallel drive by the code series.

  With the above configuration, the inner product operation is executed for each parallel drive, so that pipeline processing is possible as compared to the configuration in which the inner product operation is executed every N parallel drives corresponding to the length of the code sequence. The calculation can be performed in a short time, and the memory required for the calculation can be reduced.

  In the capacitance detection method, the output step outputs the output sFirst from the first capacitance string to the first analog integrator and outputs the output sSecond from the second capacitance string to the second. Output to the analog integrator, the estimating step performs AD conversion of the output sFirst output to the first analog integrator by an AD converter, and performs an inner product operation of the output sFirst and the code sequence di, It is preferable that the output sSecond output to the second analog integrator is AD-converted by the AD converter and an inner product operation between the output sSecond and the code sequence di is executed.

  With the above configuration, the analog integrator is arranged in parallel corresponding to each sense line, so that the detection speed for detecting the entire capacitance arranged in a matrix can be improved.

  In the capacitance detection method, the output step outputs the output sFirst from the first capacitance string to the analog integrator, and then outputs the output sSecond from the second capacitance string to the analog integration. In the estimation step, the output sFirst output to the analog integrator is AD-converted by an AD converter, and an inner product operation of the output sFirst and the code sequence di is performed. It is preferable that the output sSecond output is AD-converted by the AD converter to perform an inner product operation between the output sSecond and the code sequence di.

  With the above configuration, since the estimation step can be configured with a single analog integrator, the capacitance can be detected with a simpler configuration.

  In the capacitance detection method, the output step outputs the output sFirst from the first capacitance string to the first analog integrator and outputs the output sSecond from the second capacitance string to the second. Output to the analog integrator, and the estimation step performs AD conversion of the output sFirst output to the first analog integrator by a first AD converter and performs an inner product operation of the output sFirst and the code sequence di, It is preferable that the output sSecond output to the second analog integrator is AD-converted by a second AD converter and an inner product operation between the output sSecond and the code sequence di is performed.

  With the above configuration, the analog integrator and the AD converter are arranged in parallel corresponding to each sense line, so that the detection speed for detecting the entire capacitance arranged in a matrix can be further improved. .

  In the capacitance detection method according to the present embodiment, the estimation step includes subtracting the offset output from the first capacitance string stored in the memory from the output sFirst, the code sequence di, The capacitance value of the first capacitance string corresponding to the k1th drive line is estimated based on the inner product calculation of the first product, and the offset output from the second capacitance string stored in the memory is output as the output It is preferable to estimate the capacitance value of the second capacitance string corresponding to the k2nd drive line based on the inner product calculation of the result obtained by subtracting from sSecond and the code sequence di.

  With the above configuration, the offset caused by the analog integrator can be canceled.

  In the capacitance detection method according to the present embodiment, before the output step, when the analog integrator is reset, and when the output from the first and second capacitance strings is sampled, the first voltage is used. Driving the drive line, outputting the output from the first and second capacitance strings to the analog integrator, and using the output from the first and second capacitance strings as the offset output, the analog It is preferable to average a plurality of offset outputs obtained by repeating the operation of reading from the integrator a plurality of times and store them in the memory.

  With the above configuration, the noise component included in the offset generated by the analog integrator can be reduced and stored in the memory.

  In the capacitance detection method according to the present embodiment, the estimation step corresponds to the k1th drive line based on the inner product operation of the first digital value obtained by AD-converting the output sFirst and the code sequence di. The second capacitance corresponding to the k2nd drive line is estimated based on the inner product calculation of the second digital value obtained by estimating the capacitance value of the first capacitance string and AD converting the output sSecond and the code sequence di. The capacitance value of the first and second digital values is switched in accordance with the absolute value of the sum of each element along the code sequence column direction. Is preferred.

  With the above configuration, the gain from the analog integrator to the inner product calculation unit can be made constant for each drive by the code sequence.

In the capacitance detection method according to the present embodiment, the column in which the absolute value of the sum of the elements along the column direction of the code sequence exceeds the threshold Num related to the saturation of the analog integrator is the 2 ^nth order. Of the first, (2 ^n-1 +1), (2 ^n-1 +2 ^n-2 +1), and (2 ^n-1 -2 ^n-2 +1) columns At least one is preferred.

With the above configuration, saturation of the analog integrator can be avoided by a simple algorithm in driving with a 2 ^{n -th} order (M <2 ⁿ ) Hadamard matrix.

In the capacitance detection method according to the present embodiment, when [x] is an integer part of x and the first column of the 2 ^{n -th} order Hadamard matrix exceeds the threshold Num, the first Num × of drive lines After driving [M / Num] th by Num by [M / Num] times, the remaining number of remaining (M / Num) is driven in parallel, and (2 ⁿ⁻¹ ) of the Hadamard matrix is driven. +1) When the column exceeds the threshold value Num, after driving from the row based on the (2 ^n-1- (M-2 ^n-1 )) row of the drive line to the M row in parallel, Driving from the first row to the row based on the (2 ^n-1- (M-2 ^n-1 ) -1) row by Num units [[2 ^n-1- (M-2 ^n-1 ) -1) Row / Num] based on the row, and then the remaining ((2 ^n-1 − (M-2 ^n-1 ) -1) The remaining number of rows / Num) based on the row is driven in parallel, and the (2 ^n-1 +2 ^n-2 +1) -th column of the Hadamard matrix sets the threshold value Num. In the case of exceeding, first, the drive line from the first line to the (2 ^n-1 ) line is simultaneously driven in parallel, and the drive line ((2 ^n-1 +2 ^n-2 )-(M- (2 ^n-1 +2 ^n-2 ))) Drive from the row to the M-th row in parallel, and then from the (2 ^n-1 +1) -th row of the drive line to ((2 ^n-1 +2 ^{n) −2} ) − (M− (2 ⁿ⁻¹ +2 ⁿ⁻² ))) Num driving up to the row based on the row [(((((2 ⁿ⁻¹ +2 ⁿ⁻² ) − ( Row based on M- (2 ^n-1 +2 ^n-2 )))))-(2 ^n-1 +1) / Num] iterations and then the remaining ((((((2 ⁿ⁻¹ +2 ⁿ⁻² ) − (row based on M− (2 ⁿ⁻¹ +2 ⁿ⁻² ))))) − (2 ⁿ⁻¹ +1) / Num) can be driven in parallel. preferable.

With the above configuration, saturation of the analog integrator can be avoided by a simple algorithm in driving with a 2 ^{n -th} order (M <2 ⁿ ) Hadamard matrix.

In the capacitance detection method according to the present embodiment, by changing the order of the rows, a code sequence composed of a 2 ^{n -th} order (M <2 ⁿ ) Hadamard matrix generated by the Sylvester method is generated, and the code sequence Preferably, the M drive lines are driven in parallel based on the above.

  In the touch sensor system according to the present embodiment, the partial area is a hand-held area surrounding an area where the user touches the touch panel for input, and the partial area touch signal corresponds to a touch on the hand-held area. And the remaining area touch signal includes at least one of a drawing signal by a pen and a touch signal by a finger, and the first processing means performs the touch area based on the touch area touch signal. Or a process related to a change in the size of the hand-held area, and the second processing means performs at least a drawing input and a touch input on the two-dimensional area based on the residual area touch signal. It is preferable to execute processing based on one side.

  With the above-described configuration, it is possible to perform a process of separately handling an unintended touch signal due to the hand holding the input pen on the touch panel and an intended touch signal based on drawing on the touch panel.

  In the touch sensor system according to the present embodiment, it is preferable that the touch panel has a two-dimensional capacitance distribution and that there are a plurality of hand-held regions.

  With the above configuration, it is possible to cope with a touch sensor system including a large-screen touch panel.

  In the touch sensor system according to the present embodiment, it is preferable that the hand region moves on the two-dimensional region in accordance with the movement of the hand.

  With the above configuration, a process for separately treating an unintended touch signal resulting from putting the hand holding the input pen at an arbitrary position on the two-dimensional area on the touch panel and an intended touch signal based on drawing on the touch panel Can be implemented.

  In the touch sensor system according to the present embodiment, it is preferable that the hand-held area has a rectangular shape.

  With the above configuration, the hand-held region can be easily configured.

  The touch sensor system according to the present embodiment is arranged so as to overlap the touch panel, or a touch panel built-in display area and a touch area for setting the touch area on a screen displayed on the display panel It is preferable to further comprise setting means.

  With the above configuration, the hand-held area can be easily set.

  It is preferable that the touch sensor system according to the present embodiment further includes an automatic setting unit that automatically sets the touched area based on a touch on the two-dimensional area.

  With the configuration described above, it is possible to set the hand region more easily.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be applied to a method of estimating or detecting a coefficient, element value, or capacitance of a linear system configured in a matrix, and an integrated circuit, a touch sensor system, and an electronic device that operate according to the method. it can. The present invention can also be applied to a fingerprint detection system.

  The present invention can be used for a touch sensor system that detects a touch signal based on a touch on a touch panel. Further, the present invention can be applied to an electronic blackboard system.

DESCRIPTION OF SYMBOLS 1 Touch sensor system 2 Sensor panel 3 Integrated circuit 4 Drive part 5 Estimation part 6, 6A Analog integrator 7 Switch 8 AD converter 9 Inner product calculation part 10 RAM
11 Application Processing Unit 12 Mobile Phone 13 Display Panel 14 Display Control Circuit 15 CPU
16 ROM
17 RAM
18 Microphone 19 Speaker 20 Operation key 21 Camera 101 Touch sensor system 102 Touch panel 103 Hand region processing unit (first processing means)
104 Drawing input processing unit (second processing means)
105 Driver 106 Sense Amplifier 107 AD Converter 108 Decoding Unit 109 Display Panel 110 Handheld Area Setting Unit (Handheld Area Setting Means)
111 Automatic setting section (automatic setting means)
112 Two-dimensional region 113 Handled region (partial region)
114 Residual area 115 Control circuits 116a to 116d Area 117 Area 118 Pen input area 119 Pad menu 120 Pen input locus

Claims (13)

The first capacitance column C1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other sense For each of the second capacitance columns C2i (i = 1,..., M) formed between the lines, the orthogonal code sequence di of length N, each element being constituted by +1 or −1. = (Di1, di2,..., DiN) (i = 1,..., M), so that + V volts is applied when the code sequence is +1, and −V volts is applied when the code sequence is −1. M drive lines are driven in parallel, and the output sFirst = (s11, s12,..., S1N) from the first capacitance string and the output sSecond = from the second capacitance string = A drive unit for outputting (s21, s22,..., S2N);
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation;
Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, from one or more partial regions and a remaining region that is a region other than the partial region A sensor panel having a two-dimensional region,
First processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area;
Second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . A first capacitance string C1i formed between M drive lines and one sense line
(I = 1,..., M), and a second capacitance column C2i (i = 1,..., M) formed between the M drive lines and the other sense line. A touch sensor system comprising: a sensor panel comprising: an integrated circuit that controls the sensor panel;
The integrated circuit is provided for each of the first capacitance column C1i (i = 1,..., M) and the second capacitance column C2i (i = 1,..., M). When the code sequence is +1 based on an orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. Is driven in parallel so that + V volt is applied, and in the case of −1, −V volt is applied, and an output sFirst = (s11, s12,... , S1N), and a drive unit that outputs an output sSecond = (s21, s22,..., S2N) from the second capacitance string;
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation;
The sensor panel has a two-dimensional area composed of one or more partial areas and a remaining area that is an area other than the partial area.
The integrated circuit includes: a first processing unit configured to perform a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C 1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other one For each of the second capacitance columns C 2i (i = 1,..., M) formed between the sense lines, a length N orthogonal code in which each element is constituted by +1 or −1. Based on the series di = (di1, di2,..., DiN) (i = 1,..., M), the M drive lines are driven in parallel, and the output sFirst from the first capacitance string = (S11, s12, ..., s1N), and a drive unit that outputs an output sSecond = (s21, s22, ..., s2N) from the second capacitance string to an analog integrator;
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di A touch sensor system comprising: an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on a calculation;
The drive unit, when the code sequence of said +1, the first voltage when the analog integrator is reset, the drive by the second voltage when the output of the sampling from the first and second capacitance column drive the line, the if code sequences of the -1, said by resetting the second voltage when the analog integrator, the first and second of said first voltage at the time of sampling of the output from the capacitance column To drive the drive line,
Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, from one or more partial regions and a remaining region that is a region other than the partial region A sensor panel having a two-dimensional region,
First processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to the touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C 1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other one For each of the second capacitance columns C 2i (i = 1,..., M) formed between the sense lines, a length N orthogonal code in which each element is constituted by +1 or −1. Based on the series di = (di1, di2,..., DiN) (i = 1,..., M), the M drive lines are driven in parallel, and the output sFirst from the first capacitance string = (S11, s12, ..., s1N), and a drive unit that outputs an output sSecond = (s21, s22, ..., s2N) from the second capacitance string to an analog integrator;
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di A touch sensor system comprising: an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on a calculation;
The drive unit, before outputting an output from said first and second capacitance column to said analog integrator, when the analog integrator is reset, and the first and second capacitance column And driving the drive line with a first voltage when sampling the output from the first output, and outputting the outputs from the first and second capacitance columns to the analog integrator, and the first and second electrostatic capacitances. The output from the capacitor string is read from the analog integrator as an offset output and stored in the memory,
Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, from one or more partial regions and a remaining region that is a region other than the partial region A sensor panel having a two-dimensional region,
First processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to the touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C 1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other one A sensor panel comprising a second capacitance column C 2i (i = 1,..., M) formed between the sense lines;
A touch sensor system comprising an integrated circuit for controlling the sensor panel,
The integrated circuit is provided for each of the first capacitance column C 1i (i = 1,..., M) and the second capacitance column C 2i (i = 1,..., M). , Each of the M drive lines based on an orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. Are output in parallel, the output sFirst from the first capacitance string = (s11, s12,..., S1N) and the output sSecond from the second capacitance string = (s21, s22, .., S2N) to the analog integrator,
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation;
The drive unit, when the code sequence of said +1, the first voltage when the analog integrator is reset, the drive by the second voltage when the output of the sampling from the first and second capacitance column drive the line, the if code sequences of the -1, said by resetting the second voltage when the analog integrator, the first and second of said first voltage at the time of sampling of the output from the capacitance column To drive the drive line,
The sensor panel has a two-dimensional area composed of one or more partial areas and a remaining area that is an area other than the partial area.
The integrated circuit includes: a first processing unit configured to perform a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C 1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other one A sensor panel comprising a second capacitance column C 2i (i = 1,..., M) formed between the sense lines;
A touch sensor system comprising an integrated circuit for controlling the sensor panel,
The integrated circuit is provided for each of the first capacitance column C 1i (i = 1,..., M) and the second capacitance column C 2i (i = 1,..., M). , Each of the M drive lines based on an orthogonal code sequence di = (di1, di2,..., DiN) (i = 1,. Are output in parallel, the output sFirst from the first capacitance string = (s11, s12,..., S1N) and the output sSecond from the second capacitance string = (s21, s22, .., S2N) to the analog integrator,
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation;
The drive unit, before outputting an output from said first and second capacitance column to said analog integrator, when the analog integrator is reset, and the first and second capacitance column And driving the drive line with a first voltage when sampling the output from the first output, and outputting the outputs from the first and second capacitance columns to the analog integrator, and the first and second electrostatic capacitances. The output from the capacitor string is read from the analog integrator as an offset output and stored in the memory,
The sensor panel has a two-dimensional area composed of one or more partial areas and a remaining area that is an area other than the partial area.
The integrated circuit includes: a first processing unit configured to perform a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other sense For each of the second capacitance columns C2i (i = 1,..., M) formed between the lines, a code sequence di = (length N) in which each element is constituted by +1 or −1. (di1, di2,..., diN) (i = 1,..., M), when the code sequence is +1, + V volts are applied, and when the code sequence is −1, -V volts are applied. Are driven in parallel, the output sFirst = (s11, s12,..., S1N) from the first capacitance string, and the output sSecond = (s21) from the second capacitance string. , S22, ..., s2N),
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation;
Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, from one or more partial regions and a remaining region that is a region other than the partial region A sensor panel having a two-dimensional region,
First processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area;
Second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other sense A sensor panel comprising a second capacitance column C2i (i = 1,..., M) formed between the lines;
A touch sensor system comprising an integrated circuit for controlling the sensor panel,
The integrated circuit is provided for each of the first capacitance column C1i (i = 1,..., M) and the second capacitance column C2i (i = 1,..., M). Based on a code sequence di = (di1, di2,..., DiN) (i = 1,..., M) whose length is composed of +1 or −1, + V when the code sequence is +1 The M drive lines are driven in parallel so as to apply volt, or -V volt in the case of -1, and the output sFirst = (s11, s12, ..., s1N from the first capacitance row ), And a drive unit that outputs an output sSecond = (s21, s22,..., S2N) from the second capacitance row;
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation;
The sensor panel has a two-dimensional area composed of one or more partial areas and a remaining area that is an area other than the partial area.
The integrated circuit includes: a first processing unit configured to perform a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C 1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other one For each of the second capacitance columns C 2i (i = 1,..., M) formed between the sense lines, a code sequence di having a length N, each element consisting of +1 or −1. = (Di1, di2,..., DiN) (i = 1,..., M), the M drive lines are driven in parallel, and the output sFirst from the first capacitance string = ( s11, s12,..., s1N) and an output sSecond = (s21, s22,..., s2N) from the second capacitance string,
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di A touch sensor system comprising: an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on a calculation;
The drive unit, when the code sequence of said +1, the first voltage when the analog integrator is reset, the drive by the second voltage when the output of the sampling from the first and second capacitance column drive the line, the if code sequences of the -1, said by resetting the second voltage when the analog integrator, the first and second of said first voltage at the time of sampling of the output from the capacitance column To drive the drive line,
Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, from one or more partial regions and a remaining region that is a region other than the partial region A sensor panel having a two-dimensional region,
First processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to the touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C 1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other one For each of the second capacitance columns C 2i (i = 1,..., M) formed between the sense lines, a code sequence di having a length N, each element consisting of +1 or −1. = (Di1, di2,..., DiN) (i = 1,..., M), the M drive lines are driven in parallel, and the output sFirst from the first capacitance string = ( s11, s12,..., s1N) and an output sSecond = (s21, s22,..., s2N) from the second capacitance string,
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di A touch sensor system comprising: an estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on a calculation;
The drive unit, before outputting an output from said first and second capacitance column to said analog integrator, when the analog integrator is reset, and the first and second capacitance column And driving the drive line with a first voltage when sampling the output from the first output, and outputting the outputs from the first and second capacitance columns to the analog integrator, and the first and second electrostatic capacitances. The output from the capacitor string is read from the analog integrator as an offset output and stored in the memory,
Corresponding to the drive line, the sense line, the first capacitance column, and the second capacitance column, from one or more partial regions and a remaining region that is a region other than the partial region A sensor panel having a two-dimensional region,
First processing means for executing a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to the touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C 1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other one A sensor panel comprising a second capacitance column C 2i (i = 1,..., M) formed between the sense lines;
A touch sensor system comprising an integrated circuit for controlling the sensor panel,
The integrated circuit is provided for each of the first capacitance column C 1i (i = 1,..., M) and the second capacitance column C 2i (i = 1,..., M). The M drive lines are arranged in parallel on the basis of a code sequence di = (di1, di2,..., DiN) (i = 1,. , SFirst = (s11, s12,..., S1N) from the first capacitance string, and sSecond = (s21, s22,..., From the second capacitance string s2N) to the analog integrator, and
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation;
The drive unit, when the code sequence of said +1, the first voltage when the analog integrator is reset, the drive by the second voltage when the output of the sampling from the first and second capacitance column drive the line, the if code sequences of the -1, said by resetting the second voltage when the analog integrator, the first and second of said first voltage at the time of sampling of the output from the capacitance column To drive the drive line,
The sensor panel has a two-dimensional area composed of one or more partial areas and a remaining area that is an area other than the partial area.
The integrated circuit includes: a first processing unit configured to perform a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The first capacitance column C 1i (i = 1,..., M) formed between the M drive lines and one sense line, and the M drive lines and the other one A sensor panel comprising a second capacitance column C 2i (i = 1,..., M) formed between the sense lines;
A touch sensor system comprising an integrated circuit for controlling the sensor panel,
The integrated circuit is provided for each of the first capacitance column C 1i (i = 1,..., M) and the second capacitance column C 2i (i = 1,..., M). The M drive lines are arranged in parallel on the basis of a code sequence di = (di1, di2,..., DiN) (i = 1,. , SFirst = (s11, s12,..., S1N) from the first capacitance string, and sSecond = (s21, s22,..., From the second capacitance string s2N) to the analog integrator, and
Based on the inner product calculation of the output sFirst and the code sequence di, the capacitance value of the first capacitance string corresponding to the k1th drive line is estimated, and the inner product of the output sSecond and the code sequence di An estimation unit that estimates a capacitance value of the second capacitance string corresponding to the k2nd drive line based on the calculation;
The drive unit, before outputting an output from said first and second capacitance column to said analog integrator, when the analog integrator is reset, and the first and second capacitance column And driving the drive line with a first voltage when sampling the output from the first output, and outputting the outputs from the first and second capacitance columns to the analog integrator, and the first and second electrostatic capacitances. The output from the capacitor string is read from the analog integrator as an offset output and stored in the memory,
The sensor panel has a two-dimensional area composed of one or more partial areas and a remaining area that is an area other than the partial area.
The integrated circuit includes: a first processing unit configured to perform a first process based on a partial area touch signal corresponding to a touch on the partial area;
A second processing means for executing a second process different from the first process based on a residual area touch signal corresponding to a touch on the residual area;
The partial area is a hand-held area that surrounds an area to be put on for input to the sensor panel;
The partial area touch signal is a touch area touch signal corresponding to a touch to the touch area,
The remaining area touch signal is seen contains at least one of the touch signal by the drawing signal and fingers by the pen,
The first processing means performs processing related to movement of the hand-held area or change of the size of the hand-held area based on the hand-held area touch signal;
The second processing means performs processing based on at least one of drawing input and touch input to the two-dimensional region based on the remaining region touch signal,
The touch sensor system is characterized in that the hand -held area moves on the two-dimensional area so as to follow the movement of the center of gravity of the area to be put on for input to the sensor panel . The touch sensor system according to any one of claims 1 to 12,
An electronic apparatus comprising: a display panel that is disposed so as to overlap with a sensor panel provided in the touch sensor system, or includes the sensor panel.

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