JP2013200835A - Electronic writing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably identify a position pressed by a writing tool and change content written by an operator into electronic data with high accuracy.SOLUTION: An electronic writing device 2 includes: a placement part 24 for placing thereon a sheet 70 where an operator performs writing operation using a pen 3; and a touch panel 25 that is provided on the placement part 24 and detects a pressing position at which a tip of the pen 3 presses the sheet 70 and a pressing force at the pressing position at the time of the writing operation. The electronic writing device 2 determines a unique individual pressure pattern on the basis of a pressure detection result when the operator performs predetermined pattern writing operation and stores the determined individual pressure pattern. When simultaneously detecting plural pressing positions with at least one individual pressure pattern stored, the electronic writing device 2 applies the at least one individual pressure pattern to the detection result and identifies a pressing position by the pen 3. The electronic writing device 2 uses positional information on the identified pressing position to generate stroke data corresponding to writing onto the sheet 70.

Description

  The present invention relates to an electronic writing apparatus that records and records a description content.

  2. Description of the Related Art An electronic writing apparatus that records the description content of an operator on a writing medium as electronic data is already known (see, for example, Patent Document 1). In this electronic writing apparatus, when an operator performs a desired writing operation on a writing medium (PET film) using a writing tool (input unit), a pressing position by the writing tool and a pressing force at that time are detected. By acquiring the position information of the detected pressed part in this way, the description content of the operator on the writing medium can be converted into electronic data and recorded.

JP-A-4-7722

  When the operator performs a writing operation on the writing medium as described above, a portion (for example, palm) that is not the tip of the writing tool such as the palm of the operator may press the writing medium. In such a case, there is a possibility that the palm pressing force is transmitted to the placement section through the writing medium and erroneously detected as a pressing portion by the writing instrument. In the above prior art, in order to prevent this, paying attention to the positional relationship between the palm and the tip of the writing instrument, in the case of an operator whose dominant arm is on the right, the leftmost pressing point is identified as pressing by the writing instrument, and the dominant arm is In the case of an operator who is on the left, the rightmost pressing location is identified as pressing on the writing instrument.

  However, according to the above-described conventional technique, it is difficult to reliably specify the pressed portion of the writing instrument by identifying only the left and right of the operator's dominant arm as described above, and the description content of the operator is converted into electronic data with high accuracy. It was difficult.

  The objective of this invention is providing the electronic writing apparatus which can pinpoint the press location by a writing implement reliably and can convert the description content of an operator into electronic data with high precision.

  In order to achieve the above object, the invention of the present application is provided in a placement portion for placing a writing medium on which a writing operation of an operator using a writing instrument is performed, and the placement portion described above, and during the writing operation, The pressing part where the writing tip of the writing instrument pressed the writing medium, the pressure detecting means for detecting the pressing force at the pressing part, and the operator performed a predetermined pattern writing operation on the writing medium. Pressure pattern determining means for determining a personal pressure pattern unique to the operator based on the detection result of the pressure detecting means, and pressure pattern storage for storing the personal pressure pattern determined by the pressure pattern determining means And at least one personal pressure pattern stored in the pressure pattern storage means, the operator performs a desired writing operation on the writing medium. When the pressure detecting means simultaneously detects a plurality of pressed locations, the writing is performed by applying the at least one personal pressure pattern to the detection result to identify the pressed location by the writing instrument included in the plurality of pressed locations. And a stroke data generation unit configured to generate stroke data corresponding to the description on the writing medium using the position information of the pressed portion specified by the writing press specifying unit. And

  The electronic writing device of the present invention has a placement portion and pressure detection means. When the operator performs a desired writing operation on the writing medium using the writing tool while the writing medium is placed on the placement unit, the pressing force by the tip (lower end) that is the writing tip of the writing tool is written. It is transmitted to the mounting section through the medium. As a result, the pressed position and the pressing force at that time are detected by the pressure detecting means provided in the mounting portion (so-called pressure sensitive method). The stroke data generation means generates stroke data corresponding to the description of the operator on the writing medium by continuously acquiring the position information of the pressed location thus detected. Thereby, the description content of the operator can be recorded as electronic data.

  Here, when the operator performs a writing operation on the writing medium placed on the placement unit as described above, a portion other than the tip of the writing tool such as the palm of the operator may press the writing medium. Even in such a case, since the pressing force is transmitted to the placement unit through the writing medium, the pressing force that is not the writing tool may be erroneously detected by the pressure detection means (assuming that it is a pressing portion by the writing tool). There is.

  Generally, when an operator performs writing by holding a writing instrument by hand, it is specified between the pressed position of the tip of the writing instrument and the pressed position of the palm, depending on how the operator holds the writing instrument and the writing posture. There is a unique pressure pattern for each operator, such as the relative positional relationship between the two or the like, or the pressure of the writing instrument (= the magnitude of the pressing force) falls within a specific range.

  Therefore, in the present invention, the operator registers his / her pressure pattern in advance. That is, when the operator performs a predetermined pattern writing operation on the writing medium, based on the detection result of the pressure detection unit at that time, the pressure pattern determination unit displays the personal pressure pattern unique to the operator. decide. The determined individual pressure pattern is stored in the pressure pattern storage means. Then, in the state where the personal pressure pattern is stored in this way, the operator performs a desired writing operation on the writing medium. At that time, even if the pressure detecting means detects a plurality of pressing locations at the same time, the writing pressure specifying means applies the individual pressure pattern read from the pressure pattern storage means to the detection result, thereby The press location by a writing instrument contained in the press location is specified. Thereby, the press location by the said palms other than a writing instrument can be reliably excluded from a process target, and the press location by a writing instrument can be specified.

  As described above, in the present invention, the stroke data can be generated by reliably using only the position information of the pressed portion by the writing tool (while excluding the pressed portion by the other than the writing tool). As a result, the description content of the operator can be converted into electronic data with high accuracy and recorded.

  ADVANTAGE OF THE INVENTION According to this invention, the press location with a writing instrument can be pinpointed reliably and the description content of an operator can be converted into electronic data with high precision.

It is a system configuration figure showing the whole handwriting input system provided with the electronic writing device of one embodiment of the present invention. It is a schematic diagram for demonstrating the principle of the press detection with a touch panel. It is a functional block diagram showing the electric constitution of an electronic writing apparatus. It is explanatory drawing explaining stroke data. It is explanatory drawing explaining the determination method of a personal pressure pattern. It is explanatory drawing explaining the example of the registered individual pressure pattern. It is explanatory drawing explaining the method of specifying the press location by a pen point by applying the read personal pressure pattern. It is a flowchart showing the process performed at the time of registration of a personal pressure pattern among the control procedures which CPU performs. It is a flowchart showing the process performed at the time of the handwriting detection using a personal pressure pattern among the control procedures which CPU performs. FIG. 10 is an explanatory diagram illustrating a behavior in which an operator detects a writing pressure by tracing a graphic in a modification in which a personal pressure pattern is determined based on a pressure detection result obtained by tracing a predetermined graphic. It is a flowchart showing the process performed at the time of registration of a personal pressure pattern among the control procedures which CPU performs. It is a flowchart showing the process performed at the time of registration of a personal pressure pattern among the control procedures which CPU performs.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<System outline>
In FIG. 1, the handwriting input system 1 provided with the electronic writing apparatus 2 of this embodiment is shown. In the following description, the upper side, the lower side, the right side, the left side, the near side, and the depth side of the paper surface of FIG. 1 are respectively referred to as the upper side, the lower side, the right side, the left side, the near side, and the depth side of the electronic writing apparatus 2. Define and explain.

  As shown in FIG. 1, the handwriting input system 1 includes an electronic writing device 2 for writing with a general-purpose pen 3 (writing tool) such as a normal ballpoint pen or a mechanical pencil, and a display 4.

<Electronic writing device>
The electronic writing device 2 has a thin rectangular parallelepiped shape that is long in the vertical direction in plan view. On the lower side of the electronic writing device 2, a concave-shaped mounting portion 24 is provided so as to occupy most of the front side of the electronic writing device 2. For example, a sheet 70 (written medium) made of predetermined paper is placed on the placement unit 24.

<Touch panel>
At this time, a touch panel 25 as a pressure detection unit is provided so as to be in the same range as the placement unit 24. The touch panel 25 detects coordinate information indicating the position of the pen 3 (for example, the upper left portion of the placement unit 24 is the origin (0, 0), details will be described later). Then, the placement unit 24 holds the sheet 70 in a posture in which the upper left corner of the sheet 70 coincides with the origin in this example.

In this example, a known configuration and detection method of the touch panel 25 can be used. For example, a pressure-sensitive method using a transparent conductive film made of ITO (indium tin oxide) can be used. This pressure-sensitive method applies the principle of a pressure-sensitive structure using a resistive film sensor, which is a known technique, and detects the position pressed by the pen 3 by measuring a voltage change. As shown in FIG. 2, the internal structure is such that a glass (may be a film) 302 and a film 303, each of which is a transparent electrode film, for example, an ITO conductive layer 301, are placed slightly through an insulating bonding material 304. A gap is provided and pasted. Insulating dot spacers 305 are arranged at predetermined intervals on the surface of the transparent electrode film 301 of either the glass 302 or the film 303. When the operator writes on the sheet 70 using the pen 3 in the manner of writing a character with a normal pencil or ballpoint pen, the pressure applied by the tip of the pen 3 is transmitted to the film 303 via the sheet 70, and the film 303 At the pressed part, the transparent electrode films 301 on the film 303 side and the glass 302 side come into contact with each other, and electricity flows. In this way, the touch location and the pressing force at the press location are detected by the touch panel 25. That is, the touch panel 25 having the structure shown in FIG. 2 functions as the pressure detection means described in each claim.
Further, in this example, a system that can simultaneously detect a plurality of pressed locations is used.

<Detection of coordinate information>
The current generated in the touch panel 25 as described above is guided from the touch panel 25 to the CPU 201 (see FIG. 3 described later) via the connector tail 306, whereby the position of the pen 3 is detected by the CPU 201 as discrete coordinate information. Is done. That is, the CPU 201 acquires a plurality of pieces of position information (that is, the coordinate information) corresponding to the movement of the pen 3 when the operator performs the writing operation. As described above with reference to FIG. 1, in this embodiment, the coordinates (X, Y) at the upper left of the touch panel 25 are the origin (0, 0), the right direction is the X axis, and the lower direction is the Y axis. Use the system. That is, the value of the X coordinate represents the horizontal position on the touch panel 25 (in other words, the placement unit 24), and the value of the Y coordinate represents the vertical position.

  Based on the acquired plurality of coordinate information, the CPU 201 generates stroke data (details will be described later) corresponding to characters written on the sheet 70. At this time, the electronic writing device 2 is connected to a server SV as an external storage device via a network NW by wireless (or wired) communication in this example (see FIG. 1). The stroke data generated by the CPU 201 is transmitted to the server SV and stored.

  Note that the display 4 is connected to the electronic writing apparatus 2, and image data corresponding to the appearance of the sheet 70 placed on the placement unit 24 of the electronic writing apparatus 2 by the operator, or description on the sheet 70 by the operator. Image data (a collection of stroke data) corresponding to the contents can be displayed.

<Electrical configuration of electronic writing device>
With reference to FIG. 3, the electrical configuration of the electronic writing apparatus 2 will be described. As shown in FIG. 3, the electronic writing apparatus 2 includes a CPU 201 that controls the entire electronic writing apparatus 2, a ROM 202, a RAM 203 that temporarily stores various data, a flash memory 204, a drive circuit 209, 210 and a communication control unit 207 that controls transmission and reception of information with the server SV via the network NW.

  The ROM 202, RAM 203, flash memory 204, and drive circuits 209 and 210 are electrically connected to the CPU 201. The ROM 202 includes a program storage area 2021 and an image data storage area 2023. The program storage area 2021 stores various programs that the CPU 201 executes to control the electronic writing apparatus 2. In the image data storage area 2023, for example, image data corresponding to the format information of the sheet 70 is stored. The flash memory 204 includes a coordinate information storage area 2041.

  The drive circuit 209 is an electronic circuit for driving the touch panel 25. The drive circuit 210 is an electronic circuit for displaying an image on the display 4.

<Generation of stroke data>
Next, stroke data will be described. The stroke data is a pen position data string composed of a plurality of coordinate information acquired by the CPU 201 based on the detection result of the touch panel 25. FIGS. 4A and 4B show examples of two stroke data “a” and “b”.

  In FIG. 4A and FIG. 4B, the first stroke data “a” is data representing the trajectory of the one-stroke portion from the beginning to the end of writing of the character “a” by the electronic pen 3, Along the series, 11 pieces of coordinate information (X1, Y1), (X2, Y2),..., (X11, Y11) are used as position information corresponding to the pen position numbers T1, T2,. Including. The second stroke data “b” is data representing the trajectory of the one-stroke portion from the beginning of writing to the end of writing of the character “b” by the electronic pen 3, and the pen position numbers T12, T13 are arranged in time series. ,..., T21 includes 10 pieces of coordinate information (X12, Y12), (X13, Y13),. In this way, the CPU 201 uses a plurality of pieces of coordinate information corresponding to the detection result of the touch panel 25 to generate stroke data as a coordinate data string corresponding to the content described on the sheet 70 by the operator using the pen 3. Generate. A set of a plurality of stroke data generated in this way forms image data of the display 4.

  In the present embodiment, as shown in FIG. 4B, the first stroke data “a” corresponds to the pen position numbers T1, T2,. In addition, 11 pieces of pressure data P1, P2, P3,. Similarly, in the second stroke data “b”, ten pressure data corresponding to the pen position numbers T12, T13,... P12, P13, P14,..., P21 are also included.

<Features of this embodiment>
In the above basic configuration and operation, the feature of the present embodiment is to prevent erroneous detection of a pressing force by a device other than the pen 3 when detecting a pressed position on the touch panel 25 as described above. Hereinafter, the details will be described in order.

  For example, when the operator performs a writing operation on the sheet 70 placed on the placement unit 24 as described above, a portion other than the tip of the pen 3 such as the palm of the operator may press the sheet 70. Even in such a case, since the pressing force is transmitted to the placement unit 24 through the sheet 70, the pressing force that is not the pen 3 may be erroneously detected by the touch panel 25 as a pressing portion by the pen 3. There is.

<Method of avoiding false detection according to this embodiment>
In general, when an operator performs writing while holding the pen 3 with his / her hand, depending on the manner in which the operator holds the pen 3 or a wrinkle in the writing posture, there is a difference between the pressed position of the tip of the pen 3 and the pressed position of the palm. There is a specific pressure pattern for each operator, such as a specific relative positional relationship between them, and the strength of the pressure of the pen 3 (= the magnitude of the pressing force) falls within a specific range.

  Therefore, in this embodiment, the operator registers his / her pressure pattern in advance. That is, when the operator performs a predetermined pattern writing operation on the sheet 70, the personal pressure pattern unique to the operator is determined based on the pressure detection result of the touch panel 25 at that time. This will be described with reference to FIG.

<Registration of personal pressure pattern>
As shown in FIG. 5A, in the present embodiment, first, the operator uses a pen 3 at an arbitrary position on the sheet 70 to check a “re” point (a predetermined writing instrument locus) that is a check mark. Is equivalent). It should be noted that the entry of the “re” point corresponds to a predetermined pattern writing operation described in each claim. The CPU 201 recognizes that the position of this “let” point, which is a unique shape (and therefore easily identifiable), is the pen tip position of the pen 3 (details will be described later, and so on). At that time, as described above, a plurality of pressed positions by the palm other than the tip of the pen 3, for example, are detected by the touch panel 25, but the mass of the plurality of pressure detection positions other than the “re” point is “palm”. Is recognized by the CPU 201.

Then, the “positional relationship between the pen tip and the palm” recognized as described above is registered by the CPU 201 as the personal pressure pattern of the operator. In the example of FIG. 5B, the pen tip is registered at the upper left of the palm and the distance from the palm is W [cm]. At that time, the pressure value (for example, load X [g]) of the pen tip detected at the “re” point is also registered in the personal pressure pattern.
Furthermore, it is possible to register a change with time in the positional relationship between the pen tip and the palm, and it is also possible to register the pressure value of the pen tip with a numerical value including a fluctuation range.

  Examples of personal pressure patterns registered as described above are shown in FIGS. 6 (a) and 6 (b). FIG. 6A shows the personal pressure pattern registered for Mr. A who is right-handed. Mr. A is an operator who writes in a general manner, and as shown in the figure, the content that the pen tip is located 5 cm apart from the upper left of the palm and the pressure value by the pen tip of the pen 3 The content that (load) is 300 [g] is registered in the flash memory 204 as personal pressure unique to Mr. A, for example.

  FIG. 6 (b) shows the personal pressure pattern registered for Mr. B who is left-handed. In this example, Mr. B is an operator who has a habit of writing with his hand wrapped around his body. As shown in the figure, "The pen tip is located at a distance of 3 cm from the lower right of the palm." And the content that the pressure value (load) by the pen tip of the pen 3 is 250 [g] are registered in the flash memory 204 as personal pressure unique to Mr. B, for example.

<Identification of pen tip position>
After the personal pressure pattern is stored as described above, the operator performs a desired writing operation on the sheet 70. At that time, even if a plurality of pressed locations are detected at the same time by the touch panel 25, by applying the personal pressure pattern registered in advance to the detection result, it is included in the plurality of pressed locations. A place to be pressed by the pen 3 is specified.

  The above specific method will be described with reference to FIG. 7 by taking the case where Mr. A is an operator as an example. Normally, when the operator performs writing on the sheet 70 using the pen 3, there should be a plurality of pressed portions by at least the palm and the pen tip. Therefore, as shown in FIG. 7A, when the pressure detection point by the touch panel 25 is one (when the pressure data is one point), the data is not due to the pen tip of the pen 3 by the CPU 201. It is regarded. That is, the CPU 201 regards this press as a disturbance other than the pen 3 and the palm, and is ignored.

  After that, as shown in FIG. 7B, there are a plurality of pressure detection points by the touch panel 25 (the pressure data is a plurality of points), but there is no data that is relatively dense and 5 cm apart. The CPU 201 regards the data as palm data, not from the pen tip of the pen 3. That is, it is considered that “just before palm starts writing or during writing, only the palm is placed on the touch panel 25 and the pen tip is in the air”. Therefore, this data is also ignored.

  And as shown in FIG.7 (c), when the pressure detection location by the touchscreen 25 arises in multiple places (the said pressure data are several points), and there was one data 5cm away from the dense several pressure data, (On the condition that the pressing force of the data corresponds to Mr. A's pen tip load 300 [g]) The one data is the data by the pen tip of the pen 3 by the CPU 201, and the dense It is assumed that the data is data by pressing the palm. Thereby, the pressing location by the palm other than the pen 3 is surely excluded from the processing target, and the pressing location by the pen 3 is specified. Then, the position data (coordinate data) of the pen 3 is continuously acquired, whereby the stroke data is generated.

<Control flow>
A control procedure executed by the CPU 201 of the electronic writing apparatus 2 in order to realize the above method will be described with reference to FIGS.

<Control procedure during registration>
First, the process performed at the time of registration of the personal pressure pattern will be described with reference to FIG. In FIG. 8, this flow is started, for example, when the power of the electronic writing apparatus 2 is turned on.

  First, in step S <b> 5, the CPU 201 determines that all the pressed points and the detection points on the touch panel 25 when the operator places the sheet 70 on the placement unit 24 and performs writing with the pen 3 as described above. The pressing force at each pressing point is acquired.

  Thereafter, the process proceeds to step S10, and the CPU 201 determines whether or not there is a pressing force detected in step S10 that has a pressing force greater than or equal to a predetermined threshold value. If the pressing force at all the pressing points is less than the threshold value, the determination is not satisfied (S10: NO), and the process returns to step S5 and the same procedure is repeated. If the pressing force at any one of the pressing locations is equal to or greater than the threshold value, the determination in step S10 is satisfied (S10: YES), and the process proceeds to step S15. Note that the determination in step S10 is performed in order to avoid detection noise when nothing is pressed by the pen tip or palm, and may be omitted if not particularly necessary.

  In step S15, the CPU 201 extracts data in which the pressing force is equal to or greater than the threshold value from all the data detected by the touch panel 25 in step S5. Thereafter, the process proceeds to step S20.

  In step S20, the CPU 201 adds coordinate information on the touch panel 25 corresponding to the pressed position of the data extracted in step S15 to the data string (if data is newly generated, The first data).

  Thereafter, in step S25, the CPU 201 determines whether or not the operator has written the “re” point by adding the coordinate information to the data string in step S20. This determination may be performed by a known character recognition method using pattern matching or the like, for example. The determination is not satisfied until the “re” point is written (S25: NO), and the process returns to step S5 and the same procedure is repeated. When the “re” point is written, the determination is satisfied (S25: YES), and the routine goes to Step S30.

  In step S <b> 30, the CPU 201 extracts the pressing force (writing pressure value) in each data during the writing of the “re” point based on the acquisition result in the step S <b> 5, and generates corresponding writing pressure information. In addition, this step S30 functions as a writing pressure detection means described in each claim.

  In step S35, the CPU 201 extracts data other than each data corresponding to the “re” point, as data corresponding to the palm portion, from all the data detected by the touch panel 25 in step S5 (described above). (See FIG. 5 (a)). Thereafter, the process proceeds to step S40. In addition, this step S35 and said step S25 function as a press location specific | specification means as described in each claim.

  In step S40, the CPU 201 determines the position of the “re” point specified in step S25 (corresponding to the first pressing location) and the position of the palm portion specified in step S35 (corresponding to the second pressing location). The separation distance is calculated, and the corresponding separation distance information is generated. In addition, this step S40 functions as the distance calculation means described in each claim.

  Thereafter, the process proceeds to step S45, in which the CPU 201 corresponds to the distance information (see FIG. 5B) between the “re” point generated in step S40 and the palm portion, and the “re” point in step S30. The personal pressure pattern including the writing pressure information generated in this manner is determined. In addition, this step S45 functions as a pressure pattern determination means described in each claim. Thereafter, the process proceeds to step S50.

  In step S50, the CPU 201 stores the personal pressure pattern determined in step S45 in the flash memory 204. When there are a plurality of operators who use the electronic writing device 2, for example, the identification information (name, employee number, etc.) of the operator input by the operator through an appropriate operation is determined. It is stored in a form associated with the personal pressure (see FIGS. 6A and 6B). In addition, this step S50 functions as a pressure pattern storage means described in each claim. When step S50 is completed, this flow ends.

<Control procedure during writing detection>
Next, the process performed at the time of the handwriting detection using the said personal pressure pattern is demonstrated using FIG.

  First, in step S105, the CPU 201 reads the personal pressure pattern stored in the flash memory 204 in step S50 of FIG. As described above, when there are a plurality of operators who use the electronic writing apparatus 2, for example, the operator inputs the identification information (name, employee number, etc.) of the operator by an appropriate operation. Thus, the personal pressure pattern corresponding to the operator is specified and read out.

  Thereafter, the operator places the sheet 70 on the placement unit 24 and performs writing with the pen 3 in the same manner as described above, so that in step S110, the CPU 201 determines all the pressed locations and the pressed locations based on the detection result on the touch panel 25. Get the pressing force.

  In step S120, in the same manner as in step S10 described above, it is determined whether or not there is a pressing force detected in step S110 that has a pressing force greater than or equal to a predetermined threshold value. judge. If the pressing force at all the pressing points is less than the threshold value, the determination is not satisfied (S120: NO), and the process returns to step S110 and the same procedure is repeated. If the pressing force at any one of the pressing locations is equal to or greater than the threshold value, the determination in step S120 is satisfied (S120: YES), and the process proceeds to step S130. As described above, the determination in step S120 may be omitted unless particularly necessary.

  In step S130, as in step S15, the CPU 201 extracts data in which the pressing force is equal to or greater than the threshold value from all data detected by the touch panel 25 in step S110. Thereafter, the process proceeds to step S140.

  In step S140, the CPU 201 determines whether or not there are a plurality of data extracted in step S130, that is, whether or not there are a plurality of portions having a pressing force equal to or greater than a threshold value. If there are not a plurality of locations where the pressing force exceeds the threshold value, the determination is not satisfied (S140: NO), and the process returns to step S110 and the same procedure is repeated (see FIG. 7A). If there are a plurality of locations where the pressing force is equal to or greater than the threshold value, the determination is satisfied (S140: YES), and the routine goes to Step S150.

  In step S150, the CPU 201 detects the relative positional relationship between the position information (coordinate data) of the data at a plurality of locations extracted in step S140. Thereafter, the process proceeds to step S160.

  In step S160, the CPU 201 applies the personal pressure pattern read in step S105 to all the data in a plurality of locations extracted in step S140 and detected in relative position in step S150, and the above-described separation distance is applied. By determining the consistency between the information and the writing pressure information, a specific one of the data extracted in step S140 is specified and extracted as data by pressing the pen tip of the pen 3 (FIG. 7 (c)). In addition, this step S160 functions as a writing press identification means described in each claim.

  Thereafter, the process proceeds to step S170, and the CPU 201 adds the coordinate information on the touch panel 25 corresponding to the pressed position of the data extracted as the pen tip of the pen 3 in step S170 to the character string data string (newly). When character string data is generated, it is the first data of the character string data).

  Thereafter, the process proceeds to step S180, and the CPU 201 determines whether or not the writing by the operator is completed by a known appropriate method. For example, it may be determined using a timer whether or not the position information is not acquired on the touch panel 25 for a predetermined period, or it may be determined whether or not an appropriate writing end button has been operated by the operator. . When the writing by the operator is finished, the determination in step S180 is satisfied (S180: YES), and this flow is finished. While the writing by the operator is not completed, the determination in step S180 is not satisfied (S180: NO), and the process returns to step S110 and the same procedure is repeated.

  Thereby, in the repetition of step S110 to step S170, the coordinate information of the position newly regarded as the pressed position by the pen 3 is added to the end of the character string data generated so far. As a result, each time the procedure of step S170 is executed, coordinate information corresponding to the movement of the pen 3 is sequentially added, thereby generating stroke data corresponding to the contents of characters written on the sheet 70 of the operator. The generated stroke data is temporarily stored in the RAM 203. As a result, step S170 functions as the stroke generation means described in each claim.

  As described above, in the electronic writing device 2 of the present embodiment, the operator performs a desired writing operation on the sheet 70 using the pen 3 in a state where the sheet 70 is placed on the placement unit 24. Then, the pressing force by the tip of the pen 3 is transmitted to the touch panel 25 of the placement unit 24 through the sheet 70. Based on the detection result on the touch panel 25, the pressed part and the pressing force at that time are detected by the CPU 201. The CPU 201 generates stroke data corresponding to the description of the operator on the sheet 70 by continuously acquiring the position information of the pressed location thus detected, and the description content of the operator is electronic data. Can be recorded.

  At that time, as described above, when the operator performs a desired writing on the sheet 70 by registering a personal pressure pattern corresponding to the manner in which the operator holds the pen 3 or writing habit of writing posture. By applying the personal pressure pattern, the location pressed by the pen 3 is specified. Thereby, the press location by the said palms other than the pen 3 can be reliably excluded from the processing object, and the press location by the pen 3 can be specified. As a result, the stroke data can be generated reliably using only the position information of the place pressed by the pen 3, so that the description content of the operator can be converted into electronic data with high accuracy and recorded.

  In this embodiment, in particular, the operator-specific separation distance information between the pressed position of the tip of the pen 3 and the pressed position of the palm, which is included in the personal pressure pattern, is used. Thereby, the press location by the pen 3 can be pinpointed accurately from the detected several press location.

  In the present embodiment, in particular, writing pressure information unique to the operator by pressing the tip of the pen 3 included in the personal pressure pattern is used. Also by this, the press location by the pen 3 can be reliably specified from the detected multiple press locations.

  In the present embodiment, in particular, at the time of registration of the personal pressure pattern, based on the pressure detection result when performing a writing operation that realizes a writing tool trajectory having a predetermined shape (in the above example, “re” point), Determine personal pressure patterns. Accordingly, the operator automatically draws a trajectory of a predetermined shape with respect to the sheet 70 using the pen 3 (in the above example, “re” point), and automatically displays the personal pressure pattern of the operator. It can be registered in the electronic writing device (see FIG. 8).

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea of the present invention. Hereinafter, such modifications will be described in order. In addition, the same code | symbol is attached | subjected to the part equivalent to the said embodiment, and description is abbreviate | omitted or simplified suitably.

(1) In the case where the personal pressure pattern is determined based on the pressure detection result obtained by tracing a predetermined figure In the above embodiment, the operator writes the “re” point on the sheet 70 placed on the placement unit 24, thereby personal pressure pattern. Is determined and registered, but is not limited to this. In other words, another sheet (written medium; see FIG. 10 described later) having a predetermined figure in a predetermined area is prepared for the operator's “tracing” writing. The personal pressure pattern may be determined based on the above.

  That is, as shown in a simplified manner in FIG. 10, in this modification, another sheet on which a figure (triangle in this example) predetermined for “tracing” is printed is placed on the above-described placement unit 24. (See FIG. 10A). At this time, the CPU 201 grasps the content and position of the graphic (in this example, a triangle) on the other sheet. As for the detection result from the touch panel 25, only the detection values corresponding to only each side of the triangle and the vicinity thereof are acquired (or extracted) by the CPU 201, and the others are ignored.

  The operator performs writing using the pen 3 so as to trace the triangle (corresponding to a predetermined pattern writing operation described in each claim). At that time, the operator performs the above-mentioned tracing so that the palm does not press the touch panel 25 (for example, floating the palm in the air), and at each point on the tracing locus (corresponding to a predetermined writing instrument locus). The acquired pressure value of the pen tip (for example, load X ′ [g]) is incorporated into the personal pressure pattern as described above. In this case, the pressure value of the pen tip can be obtained quickly and accurately by touching the touch panel 25 except for the pen tip of the pen 3 (pressure detection is only one point) (FIG. 10 ( b)).

  Thereafter, the operator uses the pen 3 to trace the triangle in a normal posture where the palm presses the touch panel 25 this time. Thereby, by recognizing the pressed part of the part other than the triangle as the pressed part by the palm part, similarly to the method of FIG. 5A and FIG. Individual pressure patterns with writing pressure information can be determined and registered.

  11 and 12 will be described with reference to FIG. 11 and FIG. 12 which are executed in two stages when the personal pressure pattern is registered, which is executed by the CPU 201 of the electronic writing device 2 of the present modification in order to realize the above method. 11 and 12 correspond to FIG. 8 described above.

  First, the flow shown in FIG. 11 is executed with the separate sheet placed on the placement unit 24. In the flow shown in FIG. 11, step S26 is provided instead of step S25 in the flow shown in FIG. 8, and steps S31 and S32 are newly provided instead of steps S30 to S35. That is, after step S5, step S10, step S15, and step S20 similar to FIG. 8, the process proceeds to newly provided step S26.

  In step S26, the CPU 201 added the coordinate information in the data string in step S20, so that the operator has written the above-mentioned predetermined figure for tracing (triangle in the above example) on the other sheet. Determine if. Similar to the above, this determination may be made by a known character recognition method using pattern matching, for example. The determination is not satisfied until a predetermined graphic is written (S26: NO), and the process returns to step S5 and the same procedure is repeated. In step S5 of the flow of FIG. 11, as described above, only the detection values corresponding to only the diagram portion (contour and each side) of the predetermined graphic and its vicinity are included in the detection results from the touch panel 25. Acquired (or extracted), otherwise ignored. If a predetermined figure is written, the determination in step S26 is satisfied (S26: YES), and the process proceeds to newly provided step S31.

  In step S31, as in step S30 of FIG. 8, the CPU 201 extracts the pressing force (writing pressure value) in each data during writing of the predetermined graphic, based on the acquisition result in step S5, and corresponds. Write pressure information is generated. In addition, this step S31 functions as a writing pressure detection means in this modification.

  Thereafter, the process proceeds to step S32, and the CPU 201 stores the writing pressure information generated corresponding to the pressing force at the time of tracing the figure in step S31 in, for example, the RAM 203. Thereafter, this flow is terminated.

  Thereafter, the flow shown in FIG. 12 is executed. Unlike the flow of FIG. 11 described above, this flow is executed in a state where the operator is in a normal posture of pressing the touch panel 25 with the palm as described above. In the flow of FIG. 12, after step S5 to step S26 similar to FIG. 11, step S35 similar to FIG. 8, step S40 ′ instead of step S40, step S45 similar to FIG. S50 is provided.

  Steps S5, S10, S15, S20, and S26 in FIG. 12 are the same as those in FIG. However, in step S5 of the flow of FIG. 12, unlike the above-described FIG. 11, limited detection results are not acquired from the touch panel 25, and all detection values are acquired.

  When step S26 is completed, the process proceeds to step S35 similar to FIG. That is, in step S35, the CPU 201 corresponds to the palm part data other than each data corresponding to the figure to be traced (triangle in the above example) among all data detected by the touch panel 25 in step S5. Extracted as data. Thereafter, the process proceeds to a newly provided step S40 ′. In addition, this step S35 and said step S26 function as a press location identification means in this modification.

  In step S40 ′, the CPU 201 recognizes the position of the graphic already recognized as described above (corresponding to the first pressing location) and the position of the palm part specified in step S35 (corresponding to the second pressing location). And the corresponding separation distance information is generated. In addition, this step S40 'functions as the distance calculation means described in each claim.

  Thereafter, the process proceeds to step S45 similar to FIG. 8, and the CPU 201 includes the separation distance information generated in step S40 ′ and the writing pressure information stored in the RAM in step S32 of FIG. Determine the pressure pattern. In this modification as well, this step S45 functions as the pressure pattern determination means described in each claim.

  Subsequent step S50 is the same as that of the said FIG. 8, and abbreviate | omits description.

  Also according to this modified example, as in the above-described embodiment, it is possible to accurately identify the pressed portion by the pen 3 while reliably excluding the pressed portion other than the pen 3 from the processing target. Further, at that time, the operator automatically writes the trace using a pen 3 so as to trace a figure (a triangle in the above example) formed in a predetermined area of the other sheet. Individual pressure patterns can be registered.

(2) Others In the above, a known pressure-sensitive means is provided on the mounting portion 24 of the electronic writing device 2, and the tip of a general-purpose pen 3 such as a normal ballpoint pen presses the sheet 70 during an operator's writing operation. Although the movement of the tip of the pen 3 is detected by detecting the force, the present invention is not limited to this. That is, a method of detecting the movement of the tip of the pen 3 during the writing operation of the operator using ultrasonic waves, infrared rays, or camera imaging results may be used.

  In addition, in the above, the arrow shown in FIG. 3 shows an example of the signal flow, and does not limit the signal flow direction.

  Further, the flowcharts shown in FIGS. 8, 9, 11, and 12 do not limit the present invention to the procedure shown in the above-described flow, and the procedure can be added without departing from the spirit and technical idea of the invention. You may delete or change the order.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

  In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

2 Electronic writing device 3 Pen (writing instrument)
24 Placement part 25 Touch panel (pressure detection means)
70 sheets (written medium)

Claims (5)

A placement unit for placing a writing medium on which an operator's writing operation using a writing instrument is performed;
A pressure detecting means for detecting a pressing position where the writing tip is pressed against the writing medium, and a pressing force at the pressing position, which is provided in the above-described placement unit, during the writing operation;
A pressure pattern determining means for determining a personal pressure pattern specific to the operator based on a detection result of the pressure detecting means when the operator performs a predetermined pattern writing operation on the writing medium;
Pressure pattern storage means for storing the individual pressure pattern determined by the pressure pattern determination means;
In a state where at least one personal pressure pattern is stored in the pressure pattern storage means, the operator performs a desired writing operation on the writing medium, and the pressure detection means detects a plurality of pressed points simultaneously. When applying the at least one individual pressure pattern to the detection result, a writing press specifying means for specifying a pressing location by the writing instrument included in the plurality of pressing locations;
Stroke data generating means for generating stroke data corresponding to the description on the writing medium, using the position information of the pressed location specified by the writing press specifying means;
An electronic writing apparatus comprising: The electronic writing device according to claim 1,
Based on the detection result of the pressure detection means at the time of the pattern writing operation by the operator, a pressing location specifying means for specifying a first pressing location by the writing tip of the writing instrument and a second pressing location by the palm of the operator,
A distance calculating means for calculating a separation distance between the first pressing place and the second pressing place specified by the pressing place specifying means, and generating corresponding separation distance information;
Have
The pressure pattern determining means includes
Determining the individual pressure pattern including at least the separation distance information calculated by the distance calculation means;
The writing press specifying means is:
When the desired writing operation is performed by an operator and the pressure detection unit detects a plurality of pressed locations at the same time, the writing tool applies the separation distance information included in the personal pressure pattern to the detection result. An electronic writing device, characterized by specifying a pressed portion by the above. The electronic writing device according to claim 2,
Based on the detection result of the pressure detection means at the time of the pattern writing operation by the operator, the writing pressure detection means for extracting the writing pressure value at the first pressed position by the writing tool and generating corresponding writing pressure information. ,
The pressure pattern determining means includes
Further including the writing pressure information generated by the writing pressure detection means, determining the personal pressure pattern,
The writing press specifying means is:
When the desired writing operation is performed by an operator and the pressure detecting means detects a plurality of pressed portions at the same time, the writing pressure information included in the personal pressure pattern is applied to the detection result, and the writing instrument An electronic writing device, characterized by specifying a pressed portion by the above. In the electronic writing device according to claim 2 or claim 3,
The pressure pattern determining means includes
An electronic writing apparatus, wherein the personal pressure pattern is determined based on a detection result of the pressure detecting means when performing the pattern writing operation for realizing a writing instrument locus having a predetermined shape. In the electronic writing device according to claim 2 or claim 3,
The pressure pattern determining means includes
The personal pressure pattern is determined based on a detection result of the pressure detecting means when performing the pattern writing operation along a figure previously formed in a predetermined region of the writing medium. Electronic writing device.

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