TWI553537B - Sensing device - Google Patents

Description

Inductive component

The embodiment of the present invention relates to an inductive component, and more particularly to an inductive component suitable for sensing a touch slider.

The touch sensing control interface is more intuitive than the traditional mechanical button interface, and can enhance the user experience. Due to the large amount of research and development resources, the manufacturing cost of the touch panel has been declining in recent years. Multi-electronic products have adopted a touch panel as an operation interface, and the demand for touch sensing devices has also grown.

In the operation interface application, a slider is often used in an application scenario in which a value is continuously adjusted. If the slider function is implemented in a touch manner, the position of the user touching the touch sensing element needs to be accurately positioned. A conventional touch slider is usually implemented by using a plurality of touch buttons, and each touch button is scanned in turn, and the user's touch position is calculated by interpolation. However, in order to achieve higher precision, it is necessary to greatly increase the number of touch buttons, which will result in an increase in manufacturing costs. In addition, in the manufacturing process, the touch sliders need to control the self-capacity values of the respective touch buttons to be about the same, otherwise the control precision will be greatly reduced, and the number of the touch buttons is increased to control the control of each touch button. The difficulty of self capacitance further increases the cost of the process.

In order to produce an inductive component with a highly accurate touch slider at a low manufacturing cost, the present disclosure provides an inductive component including a comparator, a first switch, a second switch, and a controller. The comparator includes a first comparator input and a second comparator input. One end of the first switch is coupled to the input end of the first comparator, and the other end is coupled to one of the first touch electrode and the second touch electrode that are complementary to each other; one end of the second switch and the second comparator input The end is coupled, and the other end is selectively coupled to the second touch electrode. The controller controls the first switch and the second switch. When the first touch electrode and the second touch electrode are touched, the controller controls the first switch to couple the first comparator input end with the first touch electrode, and controls the second switch to make the second comparator input end The second touch electrode is coupled to the second touch electrode, and the first touched position of the first touch electrode and the second touch electrode is calculated.

In one embodiment, the sensing component further includes at least one variable capacitor unit, and the variable capacitor unit is electrically coupled to the controller and at least one of the first comparator input and the second comparator input. The controller receives at least one adjustment signal, adjusts an equivalent capacitance of the variable capacitor unit according to the adjustment signal, and the controller is configured to calculate the first touched position according to the equivalent capacitance of the variable capacitor unit.

In one embodiment, the variable capacitor unit includes a plurality of switchable capacitors, the switchable capacitors are coupled in parallel with each other, and one end of the switchable capacitor is configured to selectively receive the adjustment signal, and the other end of the switchable capacitor And being coupled to at least one of the first comparator input and the second comparator input.

In one embodiment, the variable capacitor unit also receives a drive signal from the controller for charging at least one of the first comparator input and the second comparator input by the drive signal.

In one embodiment, the widths of the first touch electrodes and the second touch electrodes are non-uniformly distributed, and the controller is configured to calculate the first touched position according to the width information of the first touch electrodes and the second touch electrodes.

In one embodiment, the controller controls the first switch to electrically couple the first comparator input to the first touch electrode and the second touch electrode alternately, and control the second switch to open the second comparator input The second touch electrode and the second touch electrode determine the touched state of the first touch electrode and the second touch electrode.

In one embodiment, the sensing component further includes a third switch, one end of the third switch is coupled to the second comparator input end, and the other end of the third switch is selectively coupled to the first touch electrode, and the controller is configured to Controlling the first switch to couple the first comparator input end with the second touch electrode, controlling the second switch to open the second comparator input end and the second touch electrode, and controlling the third switch to make the second comparator input end The second touched electrode is coupled to the first touch electrode, and the second touched position of the first touch electrode and the second touch electrode is calculated, and the first touched position is corrected by using the second touched position.

Another aspect of the present disclosure is an inductive method, comprising the steps of: controlling, by a controller, a first switch, coupling a first comparator input of the comparator to a first touch electrode and a second complement each other; One of the touch electrodes, and controls the second switch to select the second comparator input of the comparator The second touch electrode is coupled to the second touch electrode. When the first touch electrode and the second touch electrode are touched, the first switch input is coupled to the first touch electrode by the controller controlling the first switch. And controlling the second switch to couple the second comparator input end with the second touch electrode, and calculating the first touched position of the first touch electrode and the second touch electrode.

In an embodiment, the step of calculating the first touched position includes: receiving, by the variable capacitor unit, an adjustment signal from the controller, and adjusting an equivalent capacitance of the variable capacitor unit according to the adjustment signal, wherein the variable capacitor unit is The controller is electrically coupled and electrically coupled to at least one of the first comparator input and the second comparator input; the controller is configured to calculate the first touch according to the equivalent capacitance of the variable capacitor unit Touch the position.

In an embodiment, the step of adjusting the equivalent capacitance of the variable capacitor unit according to the adjustment signal comprises: selectively receiving the adjustment signal by one end of the plurality of switchable capacitors coupled in parallel with each other, and the switchable capacitor The other end is coupled to at least one of the first comparator input and the second comparator input.

When the sensing element and the sensing method provided by the disclosure are used, only a small number of touch electrodes are needed to achieve a high-precision touch operation, which not only reduces the manufacturing cost, but also reduces the area of the touch sensing element and allows the electronic component. Smaller and lighter, and enhance user experience.

This summary is intended to provide a simplified summary of the disclosure This Summary is not an extensive overview of the disclosure, and is intended to be illustrative of the embodiments of the invention.

100‧‧‧Inductive components

110‧‧‧ Controller

120‧‧‧ comparator

122‧‧‧First comparator input

124‧‧‧Second comparator input

132‧‧‧First touch electrode

134‧‧‧second touch electrode

140‧‧‧First switch

150‧‧‧second switch

160‧‧‧third switch

400‧‧‧Induction method

S410~S440‧‧‧Steps

1 is a schematic diagram showing an inductive component according to a first embodiment of the present invention; and FIGS. 2A to 2C are schematic diagrams showing changes in capacitance and potential in an inductive component as shown in FIG. 1 according to an embodiment of the present invention; 3 is a schematic diagram of a variable capacitor unit as shown in FIG. 1 according to an embodiment of the invention; and FIG. 4 is a flow chart showing a sensing method according to an embodiment of the invention.

The embodiments are described in detail below with reference to the accompanying drawings, but the embodiments are not intended to limit the scope of the invention, and the description of the structure operation is not intended to limit the order of execution, any component recombination The structure, which produces equal devices, is within the scope of the present invention. In addition, the drawings are for illustrative purposes only and are not drawn to the original dimensions. For ease of understanding, the same elements in the following description will be denoted by the same reference numerals.

The terms used in the entire specification and the scope of the patent application, unless otherwise specified, generally have the ordinary meaning of each term used in the field, the content disclosed herein, and the particular content. Certain terms used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in the description of the disclosure.

About the "about", "about", "roughly" used in this article Or "substantially" is generally the error or range of the index value, which varies from technology to technology, and the scope of which is the broadest interpretation of those of ordinary skill in the art, thereby encompassing all variants and the like. structure. In some embodiments, the error or range of the above values is within twenty percent, preferably within ten percent, and more preferably within five percent. In the text, unless otherwise stated, the numerical values referred to are regarded as approximations, such as the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

The terms "first", "second", etc., as used herein, are not intended to refer to the order or the order, and are not intended to limit the invention, only to distinguish the elements described in the same technical terms. Or just operate.

Secondly, the terms "including", "including", "having", "containing", and the like, as used herein, are all open terms, meaning, but not limited to.

In addition, the term "coupled" or "connected" as used herein may mean that two or more elements are in direct physical or electrical contact with each other, or indirectly in physical or electrical contact with each other, or Multiple components operate or act upon each other.

1 is a schematic view showing an inductive element in accordance with a first embodiment of the present invention. As shown in FIG. 1 , the sensing component 100 can be used to sense the position where the touch electrode is touched, and can perform corresponding functions or operations according to the sensing result (eg, controlling subsequent circuits, outputting digital data signals, etc.) . Specifically, the user touches the touch slider, and the touch slider includes two or more touch electrodes, and the sensing component 100 is electrically coupled to the touch electrode under the touch slider. And when the user touches the touch slider, at least two touches are touched The sensing element 100 transmits the electrical characteristic information of the touch electrode to obtain the position where the user touches the touch electrode, and performs a corresponding function or operation according to the position. In the embodiment shown in FIG. 1 , the sensing element 100 is electrically coupled to the first touch electrode 132 and the second touch electrode 134 . It should be noted that those skilled in the art can adjust the number of touch electrodes connected to the sensing component 100 according to the application requirements, and the disclosure is not limited thereto.

The sensing element 100 includes a controller 110, a comparator 120, a first switch 140, and a second switch 150. Comparator 120 includes a first comparator input 122 and a second comparator input 124. One end of the first switch 140 is coupled to the first comparator input 122, and the other end of the first switch 140 is coupled to one of the first touch electrode 132 and the second touch electrode 134 that are complementary to each other. One end of the second switch 150 is coupled to the second comparator input 124, and the other end of the second switch 150 is selectively coupled to the second touch electrode 134. The controller 110 controls the first switch 140 and the second switch 150. When the first touch electrode 132 and the second touch electrode 134 are touched, the controller 110 controls the first switch 140 to couple the first comparator input 122 to the first touch electrode 132, and controls the second switch 150. The second comparator input 124 is coupled to the second touch electrode 134, and the first touched position of the first touch electrode 132 and the second touch electrode 134 is calculated.

The controller 110 transmits the switch control signal SCS to the first switch 140 and the second switch 150 to control the switch state. In an embodiment, the controller 110 is a microcontroller, and the first switch 140 is a three-way switch. (three-way switch), the second switch 150 is a two-way switch. In another embodiment, the controller 110 is a middle In the central processor, the first switch 140 is implemented by using two two-way switches, and the second switch 150 is a two-way switch. Those skilled in the art can implement the above-described elements using other circuit elements, and the disclosure is not limited to the examples.

The first touch electrode 132 and the second touch electrode 134 are complementary to each other. In this embodiment, the first touch electrode 132 and the second touch electrode 134 are triangular electrodes, and the display position is symmetrical and the self-capacity values are about the same. . Other shapes of touch electrodes, such as rectangular, chevron, etc., may be used by those of ordinary skill in the art, and are not limited by the examples of the disclosure.

When the user touches the touch slider, the first touch electrode 132 and the second touch electrode 134 are simultaneously touched, and the capacitances of the first touch electrode 132 and the second touch electrode 134 correspond to the first A touch electrode 132 and a second touch electrode 134 are changed by the touch position, and the first comparator input 122 or the second comparator input 124 of the comparator 120 is coupled to the first touch electrode 132 or the second touch. The electrode 134 is electrically coupled, so that the potential of the input end of the comparator 120 also changes correspondingly. The controller 110 is configured to receive the output signal CP of the comparator 120, and detect the potential change at the input end of the comparator 120 to measure the capacitance change. And judge the position being touched.

The controller 110 controls the first switch 140 to couple the first comparator input 122 to the first touch electrode 132 and the second switch 150 to the second comparator input 124 and the second. The first comparator input 122 and the second comparator input 124 are coupled to the complementary first touch electrode 132 and the second touch electrode 134, respectively. Touch electrode 132 and second touch electrode 134 The noise is also the same. Therefore, when the controller 110 measures the capacitance change, the noise received by the first touch electrode 132 and the second touch electrode 134 cancels each other, and the measurement accuracy is improved. Traditionally, multiple touch buttons are used to achieve multiple times the accuracy of the touch slider. For example, with the same length of the touch slider, the conventional touch slider using multiple touch buttons can only achieve about 30 orders of control. However, the technical order can be controlled using the technical idea of the present disclosure. The number is increased to 70~80 steps. In this way, only a small number of touch electrodes can be used to achieve precise control through the touch slider, which not only reduces the area of the sensing element 100, but also provides better user experience at a low cost.

In an embodiment, the sensing component 100 further includes a variable capacitor unit Cmn and a variable capacitor unit Cmp, both of which are electrically coupled to the controller 110 to receive the adjustment signal CS from the controller 110, the variable capacitor unit Cmn. And the variable capacitor unit Cmp adjusts the equivalent capacitance according to the adjustment signal CS. In this embodiment, the variable capacitor unit Cmn is electrically coupled to the first comparator input terminal 122, and the variable capacitor unit Cmp and the second comparator input The terminal 124 is electrically coupled, and the controller 110 adjusts the equivalent capacitance of the variable capacitor unit Cmn and the variable capacitor unit Cmp, and obtains the first touch electrode according to the equivalent capacitance of the variable capacitor unit Cmn and the variable capacitor unit Cmp. The first touched position of the first touch electrode 132 and the second touch electrode 134 is calculated by the change of the capacitance of the second touch electrode 134 caused by the user touch. Details of estimating the capacitance change of the first touch electrode 132 and the second touch electrode 134 and calculating the first touched position will be further described below.

In an embodiment, the variable capacitor unit Cmn and the variable capacitor unit Cmp receive the driving signal P from the controller 110 for driving Signal P charges first comparator input 122 and second comparator input 124. The variable capacitor unit Cmn and the variable capacitor unit Cmp receive the same drive signal P from the controller 110, so that the noise received by the variable capacitor unit Cmn and the variable capacitor unit Cmp can be further cancelled.

2A to 2C are schematic views showing changes in capacitance and potential in the sensing element shown in Fig. 1 according to an embodiment of the present invention. Specifically, as shown in FIG. 1 and FIG. 2A to FIG. 2C, the variable capacitor units Cmn and Cmp have the same equivalent equivalent capacitance as the example, and the first touch electrode 132 and the second touch electrode 134 are used. In the case of no actuation (eg, the first touch electrode 132 and the second touch electrode 134 are not touched), the potential VS (ie, the potential of the first comparator input terminal 122) and the potential VDK (ie, the second comparator) The potential of the input terminal 124 can be charged to the same or similar potential by the variable capacitor units Cmn and Cmp and the drive signal P (as shown in FIG. 2A).

In one embodiment, the controller 110 controls the first switch 140 to electrically couple the first comparator input 122 to the first touch electrode 132 and the second touch electrode 134 alternately, and control the second switch 150 to be disconnected. The second comparator input 124 and the second touch electrode 134 are opened to determine the touched state of the first touch electrode 132 and the second touch electrode 134. For example, the controller 110 controls the first switch 140 to switch. The alternating period of states is a few microseconds (us). Specifically, the first touch electrode 132 and the second touch electrode 134 are activated (eg, the first touch electrode 132 and the second touch electrode 134 are touched by a finger, a stylus, etc.). In this case, the capacitance value of the end of the first touch electrode 132 and the second touch electrode 134 coupled to the first comparator input terminal 122 changes, so that the potential VS falls below the potential VDK (as shown in FIG. 2B). And the controller 110 is produced by the comparator 120. The raw comparator output signal CP detects that the first comparator input 122 is electrically lowered, thereby determining that the first touch electrode 132 and the second touch electrode 134 are touched.

When the controller 110 determines that the first touch electrode 132 and the second touch electrode 134 are touched, the first switch 140 is controlled to couple the first comparator input 122 to the first touch electrode 132 to control the second switch. The second comparator input terminal 124 is coupled to the second touch electrode 134, and the variable capacitor unit Cmn is adjusted according to the comparator output signal CP generated after the potential VS is compared with the potential VDK (eg, the variable capacitor unit Cmn After adjustment, there may be a larger equivalent capacitance relative to the variable capacitor unit Cmp, and then the first comparator input 122 is potential-compensated such that the potential VTK rises (or falls) again to be the same as or similar to the potential VDK. (As shown in FIG. 2C), the corresponding potential or capacitance change can be used for subsequent processing of data to determine the location where the touch operation occurs, or to perform a corresponding touch function.

In other embodiments, the variable capacitor unit Cmp may be adjusted according to the comparator output signal CP generated after the potential VS is compared with the potential VDK (eg, the variable capacitor unit Cmp may have a relative change after being adjusted) The capacitor cell Cmn has a smaller equivalent capacitance), and thus the second comparator input 124 is potential-compensated such that the potential VDK drops (or rises) to be the same or close to the potential VS. Or in other embodiments, the variable capacitor unit Cmp and the variable capacitor unit Cmn can be adjusted according to the comparator output signal CP generated by comparing the potential VTK with the potential VS, respectively, and then input to the second comparator. 124 and the first comparator input terminal 122 perform potential compensation such that the potential VDK and the potential VS are compensated after the potential is the same or similar.

The controller 110 is configured to receive the comparator output signal CP to generate a control The signal CS controls the variable capacitor unit Cmn to adjust the equivalent capacitance of the variable capacitor unit Cmn such that the variable capacitor unit Cmn can accordingly compensate the first comparator input 122 with potential. In other embodiments, the control signal CS is used to adjust the equivalent capacitance of the variable capacitor unit Cmp such that the variable capacitor unit Cmp can correspondingly compensate the second comparator input 124. In still other embodiments, the control signal CS can also separately adjust the equivalent capacitance of the variable capacitor unit Cmp and the variable capacitor unit Cmn, so that the variable capacitor unit Cmp and the variable capacitor unit Cmn can be correspondingly second. The comparator input 124 and the first comparator input 122 perform potential compensation.

In the embodiment of the present invention, "potential compensation" may refer to increasing the potential at the input of the comparator, and may also be used to decrease the potential at the input of the comparator, that is, the potential at the input of the comparator may be increased or decreased by the potential compensation. .

After the potential compensation is performed, the controller 110 calculates the difference in capacitance values of the first touch electrode 132 and the second touch electrode 134 according to the difference in capacitance between the variable capacitor unit Cmp and the variable capacitor unit Cmn. The following is a description of the embodiment shown in FIG. 1 . In this embodiment, when the user does not touch the first touch electrode 132 and the second touch electrode 134 , the first touch electrode 132 and the first The self-capacitance values of the second touch electrodes 134 are about the same. When the user touches the first touch electrodes 132 and the second touch electrodes 134, the equivalent capacitances of the first touch electrodes 132 and the second touch electrodes 134 are simultaneously The increase in the equivalent capacitance of the first touch electrode 132 and the second touch electrode 134 is not the same. Due to the geometric arrangement, when the user touches the position, the first touch electrode 132 The more the equivalent capacitance increase is, the less the equivalent capacitance increase of the second touch electrode 134 is, and the controller 110 is equivalent to the first touch electrode 132 and the second touch electrode 134. The difference in capacitance calculates the first touched position.

For example, when the user touches the upper edge of the second touch electrode 134 (ie, is closer to the wider portion of the second touch electrode 134), since the capacitance value is proportional to the area and inversely proportional to the distance, The equivalent capacitance of the second touch electrode 134 is increased, and the equivalent capacitance of the first touch electrode 132 is smaller. Therefore, the equivalent capacitance of the second touch electrode 134 is higher than the first touch. The electrode 132 has a smaller amount of equivalent capacitance increase of the second touch electrode 134 when the user touches the lower edge of the second touch electrode 134 (ie, is closer to the narrower portion of the second touch electrode 134). The equivalent capacitance of the first touch electrode 132 is increased, so that the equivalent capacitance of the second touch electrode 134 will be lower than that of the first touch electrode 132. The controller 110 transmits the control signal CS to the first variable capacitor unit Cmn and the second variable capacitor unit Cmp for potential compensation, and then according to the equivalent capacitance of the first variable capacitor unit Cmn and the second variable capacitor unit Cmp. For the difference, the difference between the equivalent capacitances of the first touch electrode 132 and the second touch electrode 134 is inferred, and the first touched position is calculated.

It should be noted that, in the embodiment illustrated in FIG. 1 , the widths of the first touch electrodes 132 and the second touch electrodes 134 are non-uniformly distributed to enlarge the first touch electrodes 132 and the second touch electrodes 134 . The controller 110 is further configured to calculate the first touched position according to the width information of the first touch electrode 132 and the second touch electrode 134. In this way, the high-precision touch-type slider can be obtained by using two touch electrodes, and at the same time, the number of required touch electrodes is reduced, the manufacturing process difficulty is simultaneously reduced, and the production cost is saved.

FIG. 3 is a schematic view showing a variable capacitor unit Cmn as shown in FIG. 1 according to an embodiment of the invention. As shown in Figures 1 and 3, The variable capacitor unit Cmn includes a plurality of switchable capacitors (eg, switchable capacitors C1, C2, C3, C4), and the switchable capacitors C1, C2, C3, C4 are coupled in parallel with each other, wherein the switchable capacitor C1 One ends of C2, C3, and C4 are used to selectively receive the driving signal P, and the other ends of the switchable capacitors C1, C2, C3, and C4 are commonly coupled to the first comparator input terminal 122.

In some embodiments, when the controller 110 outputs the control signal CS to the variable capacitor unit Cmn, the switches K1, K2, K3, K4 corresponding to the switchable capacitors C1, C2, C3, C4 may be respectively controlled according to the control signal CS. Switching to the on or off state causes the switchable capacitors C1, C2, C3, C4 to be turned on or off, respectively, whereby the equivalent capacitance of the variable capacitor unit Cmn is adjusted accordingly according to the control signal CS. The above description relating to the variable capacitor unit Cmn also applies to the variable capacitor unit Cmp. In addition, the person skilled in the art can use other circuit elements to implement the variable capacitor units Cmn and Cmp, and is not limited to the examples cited in the present disclosure.

In still another embodiment, the sensing component 100 further includes a third switch 160. One end of the third switch 160 is coupled to the second comparator input 124, and the other end of the third switch 160 is selectively coupled to the first touch electrode. 132 is coupled. After the controller 110 calculates the first touched position, the first switch 140 is controlled to couple the first comparator input 122 with the second touch electrode 134, and the second switch 150 is controlled to open the second comparator input 124. And the second touch electrode 134, the third switch 160 is controlled to couple the second comparator input 124 to the first touch electrode 132, and the second touch electrode 132 and the second touch electrode 134 are calculated. The position is touched, and the first touched position is corrected by the second touched position.

In the above operation, the controller 110 transmits the switch control signal SCS to the first switch 140, the second switch 150, and the third switch 160, and changes the first comparator input 122 and the second comparator input 124 to the second comparator input 124, respectively. The controller 110 is electrically coupled to the second touch electrode 134 and the first touch electrode 132, that is, the controller 110 inputs the comparator 120 and the touch electrode (including the first touch electrode 132 and the second touch electrode 134). The electrical coupling is exchanged, and the second touched position is calculated by the above method of calculating the first touched position, and the first touched position is corrected by the second touched position. For example, the controller 110 calculates an average position of the first touched position and the second touched position, and a person skilled in the art may combine the first touched position and the second touched position in other manners. It is not limited to the examples given above. The controller 110 re-improves the accuracy of the touch slider through two measurements and calculations. As described above, the sensing component 100 changes the coupling manner of the first touch electrode 132 and the second touch electrode 134 and the input end of the comparator 120 by controlling the first switch 140 and the second switch 150 to enhance the touch slider. In the present embodiment, the sensing element 100 changes the coupling manner of the first touch electrode 132 and the second touch electrode 134 and the input end of the comparator 120 by adding the third switch 160, and further The control order is increased to twice as large as when only the first switch 140 and the second switch 150 are used.

It can be seen from the foregoing embodiments that the sensing element 100 is applied to the touch sensing device, and a limited circuit design (eg, only two pins of the touch electrode) and a limited capacitor can be used to achieve a relatively sensitive touch. Inductive operation of the slider to save the arrangement of related circuits and capacitors, thereby reducing the circuit layout area occupied by the circuit and the capacitor, so that the phase of the touch sensing device The size should be effectively reduced. In addition, since the number of required touch electrodes is reduced, the process difficulty is also reduced, so that the manufacturing cost can be effectively reduced.

FIG. 4 is a flow chart showing a sensing method according to an embodiment of the invention. The sensing method 400 includes a number of steps to accurately detect the touch position of the user operating the touch slider using a small number of touch electrodes. For convenience and clarity of explanation, the following description of the sensing method 400 is exemplified by the sensing element 100 shown in FIG. 1, but the disclosure is not limited thereto. It should be understood that although the method of sensing 400 is described in a particular order of steps in the flow chart, this does not limit the order of the steps referred to in the present disclosure, and the steps may be added or subtracted in practice.

The first sensor 140 is electrically coupled to the first touch sensor 132 and the second touch electrode 134 of the comparator 120 by the controller 110. The second switch 150 is controlled by the controller 110 to electrically couple the second comparator input 124 of the comparator 120 to the second touch electrode 134 (step S410). The controller 110 controls the second switch 150 so that the second comparator input 124 is not connected to the touch electrode. Therefore, when the user touches the first touch electrode 132 and the second touch electrode 134, the second comparator input is not changed. The electrical characteristics of the terminal 124 are electrically coupled to the first touch electrode 132 or the second touch electrode 134 through the first comparator input 122, and the first comparator input is compared by the comparator 120. And a potential of the second comparator input 124 to detect whether the equivalent capacitance of the first touch electrode 132 and the second touch electrode 134 is changed. The implementation details are as described above and will not be described here.

In an embodiment, the sensing component 100 is controlled by the controller 110. The first switch 140 is controlled to electrically couple the first comparator input 122 to the first touch electrode 132 and the second touch electrode 134, and the second switch 150 is controlled to open the second comparator input 124. The details of the touch state of the first touch electrode 132 and the second touch electrode 134 are as described above, and are not described herein.

When the first touch electrode 132 and the second touch electrode 134 are touched, the first switch 140 is coupled to the first touch electrode 132 by the controller 110. And controlling the second switch 150 to couple the second comparator input 124 to the second touch electrode 134, and calculating the first touched position of the first touch electrode 132 and the second touch electrode 134 (step S420) ). The sensing element 100 electrically couples the first touch electrode 132 and the second touch electrode 134 to the first comparator input 122 and the second comparator input 124, respectively, and then the first touch electrode 132 and the second The touch electrode 134 performs potential compensation, so that the noise received by the first touch electrode 132 and the second touch electrode 134 can be cancelled, and the first touch electrode 132 and the second touch electrode 134 are complementary. Set the first touched position to calculate high accuracy.

In one embodiment, the sensing component 100 calculates a first touched position according to the width information of the first touch electrode 132 and the second touch electrode 134, and the first touch electrode 132 and the second touch The width of the electrode 134 is non-uniformly distributed. When the first touch electrode 132 and the second touch electrode 134 are non-uniformly distributed, the difference in the equivalent capacitance between the first touch electrode 132 and the second touch electrode 134 is increased when the user touches Improve the sensitivity and resolution of touch sensing.

In an embodiment, the sensing component 100 performs the first calculation When the step of touching the position, the variable capacitor units Cmn and Cmp electrically coupled to the first comparator input 122 and the second comparator input 124 of the comparator 120 respectively receive the adjustment signal CS from the controller 110. Adjusting the equivalent capacitance of the variable capacitor units Cmn and Cmp according to the adjustment signal CS, and the variable capacitor units Cmn and Cmp are electrically coupled to the controller 110, and are input to the first comparator input 122 and the second comparator. At least one of the ends 124 is electrically coupled. The controller 110 transmits the adjustment signal CS to the variable capacitor units Cmn and Cmp according to the output signal CP of the comparator 120. For example, the controller 110 transmits an adjustment signal CS to adjust the equivalent capacitance of the variable capacitor units Cmn and Cmp such that the potentials of the first comparator input 122 and the second comparator input 124 are the same, and according to the variable capacitor unit. The difference between the equivalent capacitances of Cmn and Cmp is derived by calculating the difference between the equivalent capacitances of the first touch electrodes 132 and the second touch electrodes 134 and calculating the first touched position. The controller 110 adjusts the equivalent capacitance of the variable capacitor units Cmn and Cmp and calculates the details of the first touched position as described above, and will not be described again.

In another embodiment, in the step of adjusting the equivalent capacitance of the variable capacitor units Cmn and Cmp, the sensing element 100 selectively receives the adjustment signal CS by one end of the plurality of switchable capacitors coupled in parallel with each other, To change the equivalent capacitance of the variable capacitor units Cmn and Cmp, the other end of the switchable capacitor is commonly coupled to at least one of the first comparator input 122 and the second comparator input 124, the implementation details are as described above. This will not be repeated here.

In one embodiment, the sensing component 100 receives the driving signal P from the controller 110 through the variable capacitor units Cmp and Cmn, and charges the first comparator input 122 and the second comparator input 124 according to the driving signal P (steps) S430), as described above, the self-capacitance values of the variable capacitor units Cmp and Cmn may be the same, and the first comparator input terminal 122 and the second comparator input terminal 124 are charged to the same potential through the driving signal P, When the first touch electrode 132 and the second touch electrode 134 are touched, the potential VS of the first comparator input terminal 122 decreases, and the sensing component 100 can be according to the first comparator input terminal 122 and the second comparator input terminal 124. The potential difference detects the touched state of the first touch electrode 132 and the second touch electrode 134.

In another embodiment, the sensing component 100 further controls the first switch 140 to couple the first comparator input 122 to the second touch electrode 134, and controls the second switch 150 to disconnect the second comparator. The input terminal 124 and the second touch electrode 134 control the third switch 160 to couple the second comparator input 124 to the first touch electrode 132, and calculate the first touch electrode 132 by the controller 110. The second touched position of the second touch electrode 134 is used to correct the first touched position by the second touched position (step S440). Specifically, the controller 110 electrically couples the first comparator input 122 and the second comparator input 124 to the second touch electrode 134 and the first touch electrode 132, respectively, and calculates the first The second touched position is calculated by the method of touching the position, and the first touched position is corrected according to the second touched position. The implementation details are as described above, and details are not described herein again.

It can be seen from the foregoing embodiments that the sensing element 100 and the sensing method 400 described in the present disclosure are applied to the touch slider, that is, the area of the sensing element circuit design of the touch slider can be reduced, and the limited capacitor is quite sensitive. Inductive operation of the touch slider, thereby reducing the circuit layout area occupied by the circuit and the capacitor, so that the size of the touch sensing device is effective Reduction. In addition, since the number of required touch electrodes is reduced, the difficulty in controlling the self-capacitance values of the touch electrodes in the process is also reduced at the same time, so that the manufacturing cost is effectively reduced.

The present invention has been disclosed in the above embodiments, but it is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

100‧‧‧Inductive components

110‧‧‧ Controller

120‧‧‧ comparator

122‧‧‧First comparator input

124‧‧‧Second comparator input

132‧‧‧First touch electrode

134‧‧‧second touch electrode

140‧‧‧First switch

150‧‧‧second switch

160‧‧‧third switch

Claims (10)

An inductive component includes: a comparator including a first comparator input and a second comparator input; a first switch, one of the first switches being coupled to the first comparator input, The other end of the first switch is coupled to one of the first touch electrode and the second touch electrode; and a second switch, the second switch is coupled to the second comparator input The other end of the second switch is selectively coupled to the second touch electrode; and a controller for controlling the first switch and the second switch; wherein when the first touch electrode is When the second touch electrode is touched, the controller controls the first switch to couple the first comparator input end to the first touch electrode, and controls the second switch to make the second comparator input end The second touch electrode is coupled to the second touch electrode, and the first touched position of the first touch electrode and the second touch electrode is calculated. The sensing component of claim 1, further comprising: at least one variable capacitor unit electrically coupled to at least one of the first comparator input and the second comparator input, and The controller is electrically coupled, the at least one variable capacitor unit is configured to receive at least one adjustment signal from the controller, and adjust an equivalent capacitance of the at least one variable capacitor unit according to the at least one adjustment signal; wherein the controller is configured to: The first touched position is calculated based on an equivalent capacitance of the at least one variable capacitor unit. The sensing element of claim 2, wherein the The at least one variable capacitor unit includes: a plurality of switchable capacitors coupled in parallel with each other, wherein one of the switchable capacitors is configured to selectively receive the adjustment signal, and the switchable The other end of the capacitor is coupled to at least one of the first comparator input and the second comparator input. The sensing component of claim 2, wherein the at least one variable capacitor unit receives at least one driving signal from the controller for the first comparator input and the at least one driving signal At least one of the second comparator inputs is charged. The sensor device of claim 1, wherein the width of the first touch electrode and the second touch electrode are non-uniformly distributed, the controller is configured to use the first touch electrode and the second touch electrode The width information calculates the first touched position. The sensing device of claim 1, wherein the controller controls the first switch to electrically couple the first comparator input to the first touch electrode and the second touch electrode. And controlling the second switch to open the second comparator input end and the second touch electrode to determine the touched state of the first touch electrode and the second touch electrode. The sensing component of claim 1, further comprising: a third switch, one end of the third switch is coupled to the second comparator input end, and the other end of the third switch is selectively coupled to the first a touch electrode is coupled to the first switch, wherein the first switch input is coupled to the second touch electrode, and the second switch is controlled to open the second comparator input The second touch electrode controls the third switch to make the second ratio The comparator input is coupled to the first touch electrode, and the second touched position of the first touch electrode and the second touch electrode is calculated, and the second touched position is used to correct the The first touched position. An inductive method includes: controlling, by a controller, a first switch, wherein a first comparator input of a comparator is coupled to one of the first touch electrodes and the second touch electrode And controlling a second switch, the second comparator input of the comparator is selectively coupled to the second touch electrode; and the first touch electrode and the second touch electrode When being touched, the first switch input is coupled to the first touch electrode by the controller, and the second switch is controlled to make the second comparator input and the first The touch electrodes are coupled to each other, and the first touched position of the first touch electrode and the second touch electrode is calculated. The sensing method of claim 8, wherein the calculating the first touched position comprises: receiving, by the at least one variable capacitor unit, at least one adjustment signal from the controller, according to the at least one adjustment signal Adjusting an equivalent capacitance of the at least one variable capacitor unit, wherein the at least one variable capacitor unit is electrically coupled to the controller and at least one of the first comparator input and the second comparator input And calculating, by the controller, the first touched position according to an equivalent capacitance of the at least one variable capacitor unit. The sensing method of claim 9, wherein the step of adjusting the equivalent capacitance of the at least one variable capacitor unit according to the at least one adjustment signal comprises: The at least one adjustment signal is selectively received by one end of the plurality of switchable capacitors coupled in parallel with each other, wherein the other ends of the switchable capacitors are coupled to the first comparator input and the second comparison At least one of the inputs.