JP2019086929A - Pressure-sensitive sensor device, touch sensor device, and information processing device - Google Patents

Abstract

To provide a pressure-sensitive sensor device, a touch sensor device, and an information processing device having high pressure sensitivity that can detect pressure even when a change in the distance between two pressure-sensitive sensor electrodes due to pressing is small.SOLUTION: A pressure-sensitive sensor device 10 comprises: a first pressure sensitive sensor electrode 11; a second pressure-sensitive sensor electrode 12 which is disposed at a predetermined distance from the first pressure-sensitive sensor electrode and has a third capacitance mutually with the first pressure-sensitive sensor electrode; a third pressure-sensitive sensor electrode 13 having a first capacitance mutually with the first pressure-sensitive sensor electrode and a second capacitance mutually with the second pressure-sensitive sensor electrode; a first signal generation unit 3 for applying a signal to the first pressure-sensitive sensor electrode; and a second signal generation unit 4 for applying a signal to the third pressure-sensitive sensor electrode. A detection unit 1 is comprised that detects a change amount of signals output from the first signal generation unit and the second signal generation unit according to the change amount in the first to third capacitances.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pressure sensor device, a touch sensor device, and an information processing device.

  In recent years, multifunctionalization of a portable information processing apparatus represented by a mobile phone has been promoted, and a configuration has been proposed in which a display unit provided in a housing functions as a user interface.

  For example, Patent Document 1 discloses a sensor device having a touch panel that detects an input operation position, a pressure-sensitive sensor that detects a pressing operation force, and a detection circuit.

JP 2011-134000 A

  The electrostatic capacitance type pressure detection sensor disclosed in Patent Document 1 is configured to change the distance between opposed electrodes, and detects the pressure on the input operation surface by changing the electrostatic capacitance between the opposed electrodes. It was possible. Here, in a capacitive touch sensor device for detecting touch coordinates, X coordinate touch electrodes and Y coordinate touch electrodes are arranged in directions crossing each other (for example, orthogonal X and Y directions).

  When a pointing medium such as a finger or a stylus pen contacts the input operation surface, charges move from the X coordinate touch electrode or Y coordinate touch electrode to the finger at the touch position where the pointing medium contacts, and the X coordinate touch electrode and Y coordinate touch electrode The charge moving between them is reduced. The press detection sensor can determine that the touch has been performed at a touch position determined by the X coordinate touch electrode and the Y coordinate touch electrode that detect the decrease in charge.

Moreover, the conventional pressure sensor was comprised by two pressure sensor electrodes which oppose via an elastic body. Here, the capacitance between the pressure-sensitive sensor electrodes is determined based on the following equation (1).
C = ε ₀ ε _r S / d (1)
C: capacitance, ε ₀ : permittivity of vacuum, ε _r : relative permittivity between pressure-sensitive sensor electrodes, S: facing area of pressure-sensitive sensor electrodes, d: distance between pressure-sensitive sensor electrodes

  From equation (1), it is shown that the capacitance between the pressure-sensitive sensor electrodes increases as the facing area of the pressure-sensitive sensor electrodes increases or as the distance between the pressure-sensitive sensor electrodes decreases. In the conventional pressure-sensitive sensor device, it has been detected that the input operation surface is pressed and pressed based on the capacitance that increases as the distance between the two pressure-sensitive sensor electrodes is shortened. The relationship shown in Formula (1) is established not only in the pressure-sensitive sensor electrode but also in the capacitance between the X coordinate touch electrode and the Y coordinate touch electrode.

  However, in the conventional pressure-sensitive sensor device, it is detected that the input operation surface is pressed, and the pressing is detected by detecting a change in capacitance which increases as the distance between the two pressure-sensitive sensor electrodes is shortened. Since the change in the distance between the two pressure-sensitive sensor electrodes caused by the pressure on the input operation surface is small, the change in the capacitance is also small, and it becomes difficult to obtain the necessary pressure sensitivity.

  The present invention has been made in view of such a situation, and a pressure sensitivity with high pressure sensitivity capable of detecting pressure even when a change in distance between two pressure sensitive sensor electrodes caused by pressure is small. An object of the present invention is to provide a sensor device, a touch sensor device, and an information processing device.

  A pressure-sensitive sensor device according to the present invention includes a first pressure-sensitive sensor electrode, a second pressure-sensitive sensor electrode disposed apart from the first pressure-sensitive sensor electrode, the first pressure-sensitive sensor electrode, and the second pressure-sensitive sensor electrode. Applying a signal to a third pressure-sensitive sensor electrode disposed apart from the pressure-sensitive sensor electrode, a first signal generation unit applying a signal to the first pressure-sensitive sensor electrode, and the third pressure-sensitive sensor electrode And a second signal generation unit, having a first capacitance between the first pressure-sensitive sensor electrode and the third pressure-sensitive sensor electrode, and a second pressure-sensitive sensor electrode and the third pressure-sensitive electrode It has a second capacitance with the sensor electrode, and has a third capacitance between the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode, and the first signal generator And detecting the amount of change of the signal output from the second signal generator in accordance with the change in the first to third capacitances. It provided with a part.

  Further, a touch sensor device according to the present invention includes a touch electrode that detects a touch position, and the above-described pressure-sensitive sensor device.

  In addition to the touch sensor device having the touch electrode for detecting the touch position described above and the pressure-sensitive sensor device, the information processing device according to the present invention includes the touch position detected by the touch electrode and the output of the pressure sensor device. A display device for displaying an image according to

  According to the present invention, the input operation surface is pressed, and the distance between the third pressure-sensitive sensor electrode and the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode becomes short, whereby the first signal generating unit And it becomes possible to detect that the signal output from the 2nd signal generation part was pressed based on the change amount according to the change of the 1st-3rd electrostatic capacitance. At this time, by increasing the outputs of the first signal generating unit and the second signal generating unit, the amount of change in the signal flowing between the first pressure sensitive sensor electrode and the second pressure sensitive sensor electrode can be increased. Even when the change in the distance between the first and second pressure-sensitive sensor electrodes and the third pressure-sensitive sensor electrode is small, the pressure can be detected with high sensitivity.

  Problems, configurations, and effects other than those described above will be apparent from the description of the embodiments below.

It is an explanatory view showing an example of basic composition of a pressure sensitive sensor device concerning a 1st embodiment of the present invention. It is an explanatory view showing the 1st modification of the pressure sensitive sensor device concerning a 1st embodiment of the present invention. It is an explanatory view showing the 2nd modification of the pressure sensitive sensor device concerning a 1st embodiment of the present invention. It is an explanatory view showing the 3rd modification of the pressure sensitive sensor device concerning a 1st embodiment of the present invention. It is explanatory drawing which shows the 4th modification of the pressure sensor apparatus which concerns on the 1st Embodiment of this invention. It is an explanatory view showing the 5th modification of the pressure sensitive sensor device concerning a 1st embodiment of the present invention. It is a schematic block diagram of the touch panel device concerning a 2nd embodiment of the present invention. It is an explanatory view showing an example of basic composition of a touch panel device concerning a 2nd embodiment of the present invention. It is an explanatory view showing the 1st modification of the touch panel device concerning a 2nd embodiment of the present invention. It is an explanatory view showing the 2nd modification of the touch panel device concerning a 2nd embodiment of the present invention. It is an explanatory view showing the 3rd modification of the touch panel device concerning a 2nd embodiment of the present invention. It is an explanatory view showing the 4th modification of the touch panel device concerning a 2nd embodiment of the present invention. It is an explanatory view showing the 5th modification of the touch panel device concerning a 2nd embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. In the specification and the drawings, components having substantially the same function or configuration will be assigned the same reference numerals and overlapping descriptions will be omitted.

First Embodiment
<Basic Configuration of Pressure-Sensitive Sensor Device>
First, the configuration of the pressure-sensitive sensor device according to the first embodiment of the present invention will be described. FIG. 1 is an explanatory view showing an example of the basic configuration of a pressure-sensitive sensor device 10. As shown in FIG. The pressure-sensitive sensor device 10 shown in FIG. 1 can detect that the input operation surface of the pressure-sensitive sensor device 10 is pressed by a capacitance method.

  As shown on the left side of FIG. 1, the pressure-sensitive sensor device 10 includes a detection unit 1, a signal processing unit 2, a first pressure-sensitive sensor electrode 11, a second pressure-sensitive sensor electrode 12, a third pressure-sensitive sensor electrode 13, and a shield electrode. 14, an elastic body 20, a first signal generator 3, and a second signal generator 4 are provided.

  The detection unit 1 is connected to the second pressure-sensitive sensor electrode 12, and the first signal generating unit 3 and the first signal-generating unit 3 along with the change in capacitance between the first to third pressure-sensitive sensor electrodes 11 to 13. The signal is output from the second signal generating unit 4 and is between the first pressure sensitive sensor electrode 11 and the second pressure sensitive sensor electrode 12, between the first pressure sensitive sensor electrode 11 and the third pressure sensitive sensor electrode 13, and the second pressure sensitive It is possible to detect a change in current flowing between the sensor electrode 12 and the third pressure-sensitive sensor electrode 13 and to the detection unit 1. The detection unit 1, the signal processing unit 2 to be described later, the first signal generation unit 3, and the second signal generation unit 4 can be configured by hardware or firmware. When the detection unit 1 detects a change in current, the detection unit 1 outputs a detection signal corresponding to the change in current to the signal processing unit 2.

  The signal processing unit 2 performs a predetermined process based on the detection signal input from the detection unit 1. For example, the signal processing unit 2 may output a control signal to an electronic device (not shown) connected to the pressure-sensitive sensor device 10. The detection unit 1 and the signal processing unit 2 are also connected to the pressure-sensitive sensor device 10 of FIG. 3 and later, but in order to simplify the description of the drawings, the detection unit 1 and the signal processing unit 2 of FIG. Illustration is omitted.

  A shield electrode 14 connected to a ground or a specific potential is disposed on the top (upper side in the Z direction in the drawing) of the pressure-sensitive sensor device 10. The shield electrode 14 is used to limit the inflow or outflow of charge from the outside to the first pressure sensitive sensor electrode 11 and the second pressure sensitive sensor electrode 12. If the pressure-sensitive sensor device 10 does not have the shield electrode 14, the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 only by the finger approaching the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12. Charge flows in or out. By providing the shield electrode 14, unnecessary charges flow into or out of the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 from the finger approaching the shield electrode 14, and the first pressure-sensitive sensor electrode 11 and the first pressure-sensitive sensor electrode 12 It is possible to prevent the capacitance between the two pressure sensitive sensor electrodes 12 from being changed unintentionally. However, when the finger or the like does not affect the first capacitance, the second capacitance, and the third capacitance described later, the shield electrode 14 is not necessarily required.

  In FIG. 1, the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 are disposed on the same plane at a position closer to the shield electrode 14 below the shield electrode 14 than the third pressure-sensitive sensor electrode 13. There is. The first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 are arranged horizontally separated by a distance d1. The capacitive element C3 is generated at a portion where the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 face each other by the distance d1.

  Then, an elastic body 20 (an example of a space maintaining member) is disposed under the first pressure sensor electrode 11 and the second pressure sensor electrode 12. For the elastic body 20, for example, a material having a small residual strain and a high recovery rate (restoration speed) is used. Examples of the material used for the elastic body 20 include silicone rubber, urethane rubber, and polyolefin foam. The elastic body 20 maintains a distance between the first pressure-sensitive sensor electrode 11 and the third pressure-sensitive sensor electrode 13 and between the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13. Used. In FIG. 1, the elastic body 20 is provided between the first pressure sensor electrode 11 and the third pressure sensor electrode 13 and between the second pressure sensor electrode 12 and the third pressure sensor electrode 13. Be

  The third pressure sensor electrode 13 is disposed apart from the first pressure sensor electrode 11 and the second pressure sensor electrode 12. FIG. 1 shows an example in which a portion of the third pressure-sensitive sensor electrode 13 is opposed to the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 with the elastic body 20 interposed therebetween. It is done. The capacitive element C1 is generated between the portions where the first pressure sensitive sensor electrode 11 and the third pressure sensitive sensor electrode 13 face each other, and the second pressure sensitive sensor electrode 12 and the third pressure sensor electrode 13 face each other. A capacitive element C2 is generated between the portions. The capacitive elements C1 and C2 each have a capacitance.

  One end of the first signal generation unit 3 is connected to the first pressure-sensitive sensor electrode 11, and the other end is connected to the detection unit 1. One end of the second signal generation unit 4 is connected to the third pressure-sensitive sensor electrode 13, and the other end is connected to the detection unit 1.

  The detection unit 1 detects the amount of change in current of the signals applied from the first signal generator 3 and the second signal generator 4. The detection unit 1 outputs, to the signal processing unit 2, a detection signal according to the amount of change in current that changes with the change in capacitance among the first to third pressure-sensitive sensor electrodes 11 to 13. Can be detected.

  The signals applied from the first signal generating unit 3 and the second signal generating unit 4 have waveforms with a fixed period and amplitude, such as rectangular waves such as AC signals, triangular waves, sine waves, sawtooth waves, etc. . Alternatively, a plurality of isolated waveforms that are a combination of these may be applied.

  The pressure-sensitive sensor device 10 increases the potential difference of the third pressure-sensitive sensor electrode 13 with respect to the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 to obtain the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode. The charge easily moves between the sensor electrode 12 and the third pressure-sensitive sensor electrode 13. Further, the pressure-sensitive sensor device 10 realizes charge / discharge cycles of the capacitive elements C1, C2 generated between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13. be able to.

  Thereby, the pressure-sensitive sensor device 10 makes the amount of change of the current which is output from the first and second signal generation units 3 and 4 and flows to the detection unit 1 when the pressure-sensitive sensor device 10 is pressed. The pressure can be detected with high sensitivity even when the change in the distance between the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode and the third pressure-sensitive sensor electrode is small.

  That is, as shown on the right side of FIG. 1, it is assumed that the shield electrode 14 of the pressure-sensitive sensor device 10 is pressed downward by an indication medium such as a finger. However, a top plate 23 shown in FIG. 7 described later may be installed on the shield electrode 14. In this case, the shield electrode 14 is pressed by applying a pressing force when the finger presses the top plate 23 to the shield electrode 14. Further, between the shield electrode 14 and the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12, the first base film 21 and the second base film 22 shown in FIG. The distance between the first pressure sensitive sensor electrode 11 and the second pressure sensitive sensor electrode 12 with respect to the electrode 14 does not change.

  When the shield electrode 14 moves downward by the distance d3, the elastic body 20 is compressed and deformed in the vertical direction. Then, the height d2 between the first pressure-sensitive sensor electrode 11 and the third pressure-sensitive sensor electrode 13 and the height d2 between the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 narrow by the distance d3. . Therefore, the electrical coupling between the first pressure-sensitive sensor electrode 11 and the third pressure-sensitive sensor electrode 13 and between the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 becomes strong, and Between the first pressure-sensitive sensor electrode 11 and the third pressure-sensitive sensor electrode 13, and between the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 as shown in FIG. The second capacitance of the capacitive element C2 of Further, the electrical coupling between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 is weakened, and the third of the capacitive element C3 between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 Capacitance decreases.

  Here, in the pressure-sensitive sensor device 10, when the shield electrode 14 of the pressure-sensitive sensor device 10 is pressed downward by the indication medium such as a finger, the third capacitance due to the change of the first and second capacitances In order to capture changes in the sensitivity with high sensitivity, (a) the electrical coupling between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 is weak, and (b) the first pressure-sensitive sensor electrode 11 and the second It is desirable that the electrical coupling between the pressure sensitive sensor electrode 12 and the third pressure sensitive sensor electrode 13 be strong.

  In order to realize (b), the height d2 between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 needs to be short, This is realized by shortening the height d2 as the shield electrode 14 of the pressure-sensitive sensor device 10 is pressed downward by the instruction medium.

The method of capturing the change of the current (charge amount) flowing to the detection unit 1 by capturing the change of the first to third capacitances by (b) is the following equation (2) for finding the charge amount of the current flowing to the detection unit 1 In the above, it can be said that it is a method of measuring the amount of change of the charge amount Q by capturing the change of the capacitance C.
Q = CV (2)
C: capacitance, Q: charge amount, V: potential difference

  As shown in the equation (2), when the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 approach to each other by being pressed and the distance becomes short, the first and the first The first and second capacitances between the two pressure-sensitive sensor electrodes 11, 12 and the third pressure-sensitive sensor electrode 13 also increase in proportion and flow between the first to third pressure-sensitive sensor electrodes 11 to 13. The amount of charge increases.

  However, the desired height d2 may not be obtained depending on conditions such as the elastic body 20, the material of the base film to be described later, the pressing force of the operator, and the like.

  The pressure-sensitive sensor device 10 increases the change of the charge amount Q with V in the equation (2) by applying signals by the first and second signal generation units 3 and 4, that is, the first pressure-sensitive sensor The movement of charge is promoted by increasing the potential difference of the third pressure-sensitive sensor electrode 13 with respect to the electrode 11 and the second pressure-sensitive sensor electrode 12, and the charge amount output from the first and second signal generation units 3 and 4 The change in Q can be increased. Therefore, even when the change in the distance between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 is small, the pressure can be detected with high sensitivity.

  Here, once the third pressure-sensitive sensor electrode 13 is fixed to a specific potential, once a signal is output, between the portions where the first pressure-sensitive sensor electrode 11 and the third pressure-sensitive sensor electrode 13 face each other. Because the capacitance of the capacitive element C2 generated between the portion of the capacitive element C1 generated at the point where the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 face is not discharged, control of V can not be performed. . For this reason, the change in charge amount is captured only by the change in capacitance, and the sensitivity is limited.

  On the other hand, in the pressure-sensitive sensor device 10, the first and second signal generation units 3 and 4 apply a signal having a waveform having a predetermined period and amplitude, such as an alternating current signal, to the capacitive element C1 or C2. A charge and discharge cycle is realized. Therefore, the outputs of the first and second signal generation units 3 and 4 are increased, that is, the potential difference between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 is increased. Between the first pressure-sensitive sensor electrode 11 to the third pressure-sensitive sensor electrode 13 due to a change in the distance between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13. The change rate of the charge amount Q flowing to the detection unit 1 can be increased, and the change rate of the charge amount Q flowing to the detection unit 1 can be increased.

  When detecting a change in current flowing between the first to third pressure-sensitive sensor electrodes 11 to 13, the detection unit 1 outputs different detection signals to the signal processing unit 2 based on the change rate of the current. Thereby, the pressure-sensitive sensor device 10 can detect that the input operation surface is pressed.

  The signal processing unit 2 can determine how much the pressure-sensitive sensor device 10 has been pressed based on the detection signal input from the detection unit 1, and the electronic device (not shown) connected to the pressure-sensitive sensor device 10 can On the other hand, it becomes possible to output a control signal and perform predetermined processing (for example, switching of a display screen) according to the pressing amount.

  Further, according to the pressure-sensitive sensor device 10, the change rate of the charge amount Q is increased using the potential difference between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13. It is necessary to increase the electrode size of the first to third pressure-sensitive sensor electrodes 11 to 13 in order to increase the capacitance between the first pressure-sensitive sensor electrode 11 to the third pressure-sensitive sensor electrode 13. The pressure sensitivity can be improved without the need (see the above equation (1)).

  The signal applied from the second signal generator 4 to the third pressure sensitive sensor electrode 13 may be in reverse phase to the signal applied from the first signal generator 3 to the first pressure sensitive sensor electrode 11. This makes it possible to reduce the current flowing to the detection unit 1 under specific conditions.

  Further, the signal applied from the second signal generator 4 to the third pressure sensitive sensor electrode 13 may be in phase with the signal applied from the first signal generator 3 to the first pressure sensitive sensor electrode 11. Thus, the current flowing to the detection unit 1 can be increased under a specific condition.

  Further, the signal applied from the second signal generator 4 to the third pressure sensitive sensor electrode 13 has a phase difference from the signal applied from the first signal generator 3 to the first pressure sensitive sensor electrode 11 It may be The phase difference between the signals applied from the first signal generator 3 and the second signal generator 4 may be fixed or random. Thereby, the change in the current flowing to the detection unit 1 can be increased under a specific condition.

First Modified Example of Pressure-Sensitive Sensor Device
FIG. 2 is a cross-sectional view showing a first modification of the pressure sensor device 10. As shown in FIG. As shown in FIG. 2, in the pressure-sensitive sensor device 10, the first signal generating unit 3 may be connected to the third pressure-sensitive sensor electrode 13 instead of the second signal generating unit 4.

  A circuit configuration is achieved by sharing a signal generation unit that applies a signal between the first pressure sensitive sensor electrode 11 and the second pressure sensitive sensor electrode 12 and a signal generation unit that applies an alternating current signal to the third pressure sensitive sensor electrode 13 Can be simplified.

Second Modification of Pressure-Sensitive Sensor Device
FIG. 3 is an explanatory view showing a second modification of the pressure sensor device 10. As shown in FIG. The pressure-sensitive sensor device 10A shown on the left side of FIG. 3 has a configuration in which the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 are disposed on different surfaces. A resin, an adhesive or the like (not shown) is enclosed between the second pressure sensitive sensor electrode 12 and the elastic body 20.

  In the pressure-sensitive sensor device 10B shown on the right side of FIG. 3, the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 are disposed on different surfaces, and further, the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode It is shown that a part of 12 is arranged overlapping.

  Even with such pressure-sensitive sensor devices 10A and 10B, as in the pressure-sensitive sensor device 10 shown in FIG. 1A, it is possible to detect pressing with high sensitivity.

<Third Modification of Pressure-Sensitive Sensor Device>
FIG. 4 is an explanatory view showing a third modified example of the pressure sensor device 10. As shown in FIG. The pressure-sensitive sensor device 10C shown in FIG. 4 has a configuration in which the third pressure-sensitive sensor electrode 13 is disposed below the shield electrode 14. Therefore, the third pressure-sensitive sensor electrode 13 is disposed at a position closer to the shield electrode 14 than the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12.

  The first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 are disposed below the third pressure-sensitive sensor electrode 13 with the elastic body 20 interposed therebetween. As shown in the pressure-sensitive sensor device 10 shown in FIG. 1, when the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 are disposed below the shield electrode 14, the shield electrode 14 is slightly The deformation may cause an unintended change in the capacitance between the first pressure sensitive sensor electrode 11 and the second pressure sensitive sensor electrode 12. Therefore, when the pressure-sensitive sensor device 10C is configured as shown in FIG. 4, the capacitance between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 changes without being influenced by the shield electrode 14 Therefore, compared to the pressure-sensitive sensor device 10 shown in FIG. 1, the sensitivity for detecting the change in capacitance when the shield electrode 14 is pressed can be enhanced.

  The presence of the third pressure-sensitive sensor electrode 13 requires the shield electrode 14 when the first capacitance, the second capacitance, and the third capacitance are not affected by a finger or the like. And not. Therefore, when the shield electrode 14 is removed from the pressure-sensitive sensor device 10C, the function of the shield electrode 14 can be provided to the third pressure-sensitive sensor electrode 13. Conversely, the shield electrode 14 may have the function of the third pressure-sensitive sensor electrode 13 except for the third pressure-sensitive sensor electrode 13.

<Fourth Modified Example of Pressure-Sensitive Sensor Device>
FIG. 5 is an explanatory view showing a fourth modification of the pressure sensor device 10. As shown in FIG. In the pressure-sensitive sensor device 10D shown in FIG. 5, the elastic body 20 is disposed at a place different from the space between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13. The elastic body 20 has a portion other than the portion between the first pressure-sensitive sensor electrode 11 and the third pressure-sensitive sensor electrode 13 and a portion other than the portion between the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13. (For example, it is provided in the housing part of pressure sensor apparatus 10D).

  Here, when the shield electrode 14 is not pressed, the pressure-sensitive sensor device 10D is in the state shown on the left in FIG. 5, but when the shield electrode 14 is pressed downward by the distance d3, the elastic body 20 is compressed. Thus, as shown on the right of FIG. 5, the shield electrode 14 and the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 approach the third pressure-sensitive sensor electrode 13. Then, the detection unit 1 can detect that the third capacitance of the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 has changed.

<Fifth Modification of Pressure-Sensitive Sensor Device>
FIG. 6 is an explanatory view showing a fifth modified example of the pressure-sensitive sensor device 10. As shown in FIG. In the pressure-sensitive sensor device 10E shown in FIG. 6, a spacer 25 (an example of a space maintaining member) is provided at a place different from between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13. It is arranged. The spacer 25 does not deform even when the shield electrode 14 is pressed. The spacer 25 is a portion other than between the first pressure-sensitive sensor electrode 11 and the third pressure-sensitive sensor electrode 13 and a portion other than between the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13 (for example, , And the housing portion of the pressure-sensitive sensor device 10E.

For this reason, even when the pressure-sensitive sensor device 10E is in the state shown on the left of FIG. 6 when the shield electrode 14 is not pressed, if the shield electrode 14 is pressed downward by the distance d4, shown in FIG. When the top plate 23 as described above bends downward, the shield electrode 14 and the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 approach the third pressure-sensitive sensor electrode 13. Then, the detection unit 1 can detect that the third capacitance of the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 has changed.
Second Embodiment

  Next, a second embodiment of the present invention will be described. Here, a touch sensor device including a pressure sensor device and a configuration of a touch panel device including the touch sensor device will be described.

<Schematic Configuration of Touch Panel Device>
FIG. 7 is a schematic block diagram of the touch panel device 40. As shown in FIG. The position of the pressure-sensitive sensor device 10 installed in the touch panel device 40 (an example of the information processing device) viewed from above and the position of the frame of the housing 52 are indicated by broken lines on the top of FIG. 7. The pressure sensor device 10 is housed in the housing 52. Six pressure sensitive sensor devices 10 are provided on the frame of the housing 52. For this reason, the user does not look directly at the pressure sensor device 10. As shown in FIG. 7, although the number of the pressure-sensitive sensor devices 10 to be installed is usually two or more, it is not necessary to provide two or more, and may be one.

  The touch panel device 40 includes the detection unit 1 and the signal processing unit 2 shown in FIG. The detection unit 1 detects that the pressure-sensitive sensor device 10 is pressed based on a change in current flowing to the detection unit 1 of the pressure-sensitive sensor device 10 included in the touch panel device 40. Note that the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 (both are examples of touch electrodes) of the touch sensor device 30 are connected to the detection unit 1, and a finger is directly or indirectly connected to the input operation surface 24 of the touch panel device 40. When touching, the touch position on the XY plane may be detected. In this case, the detection unit 1 outputs the detection signal and the touch detection signal to the signal processing unit 2. The signal processing unit 2 performs predetermined processing based on the detection signal and the touch detection signal. For example, based on the detection signal, the signal processing unit 2 performs control to switch and display an image, an icon, and the like displayed on the display panel 50 shown in the lower part of FIG. 7. The detection unit 1 and the signal processing unit 2 may be provided in any of the pressure-sensitive sensor device 10, the touch sensor device 30, and the touch panel device 40.

  At the bottom of FIG. 7, cross-sectional views of the touch panel device 40 and the pressure sensor device 10 are shown. The pressure-sensitive sensor device 10 shown in FIG. 1 is disposed on the frame of the housing 52. The third pressure-sensitive sensor electrode 13 included in the pressure-sensitive sensor device 10 is disposed so as to be sandwiched between the frame of the housing 52 and the elastic body 20. In addition, an area in which the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 overlap in a plane is a coordinate detection area in the XY plane. Then, the display panel 50 (an example of a display device) is disposed so that the display area overlaps the coordinate detection area. In the display area of the display panel 50, the touch position detected by the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 by the image display processing performed by the signal processing unit 2, and the change in the current flowing into the detection unit 1 (press change) Images such as characters, graphics, images, icons, etc. corresponding to are displayed.

  The top plate 23 protects the surface of the touch panel device 40. A transparent glass substrate or a film is used for the top plate 23. The surface of the top plate 23 serves as an input operation surface 24 with which a user touches a finger to perform a touch operation. Further, the first base film 21 is used to arrange the X coordinate touch electrode 31, the first pressure sensitive sensor electrode 11, and the second pressure sensitive sensor electrode 12 on the same plane. If the order in which the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 overlap is reversed, the Y coordinate touch electrode 32, the first pressure sensitive sensor electrode 11, and the second pressure sensitive on the same surface of the first base film 21. The sensor electrode 12 may be disposed. Therefore, the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 are disposed on the same plane as either the X coordinate touch electrode 31 or the Y coordinate touch electrode 32.

  The second base film 22 is used to arrange the Y coordinate touch electrode 32 and the shield electrode 14 on the same plane. If the order in which the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 overlap is reversed, the X coordinate touch electrode 31 and the shield electrode 14 may be disposed on the same surface of the second base film 22. Therefore, the shield electrode 14 is disposed in the same plane as either the X coordinate touch electrode 31 or the Y coordinate touch electrode 32.

  For example, OCA (Optical Clear Adhesive), which is a double-sided adhesive tape, is attached to the upper surface and the lower surface of the second base film 22. Therefore, the first base film 21 and the second base film 22 and the elastic body 20 are bonded via the OCA, and the second base film 22 and the top plate 23 are bonded via the OCA.

  An air gap 51 is provided between the display panel 50 and the touch sensor device 30. In the air gap 51, when the input operation surface 24 of the top plate 23 is pressed and the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 move downward, the back surface of the first base film 21 is a display panel It is provided to prevent contact with the 50 surfaces. The display panel 50 may be bonded to the lower surface of the first base film 21 using OCA or the like. However, when the first base film 21 and the display panel 50 are attached to each other, a gap needs to be provided between the display panel 50 and the housing 52.

  Here, based on the schematic configuration of the touch panel device 40 shown in FIG. 7, the combination of the touch sensor device and the pressure sensor device will be described in order from FIG. 8. In the description after FIG. 8, the display panel 50 and the housing 52 are not shown. Also in the configuration described in FIG. 8 and later, the elastic members 20 and the spacers 25 (spacings are maintained at different places between the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 and the third pressure-sensitive sensor electrode 13). An example of a member may be arranged.

<Basic Configuration of Touch Panel Device>
FIG. 8 is an explanatory view showing a basic configuration example of the touch panel device 40. As shown in FIG. The touch sensor device 30 included in the touch panel device 40 is configured by sequentially stacking the first base film 21, the Y coordinate touch electrode 32, the second base film 22, the X coordinate touch electrode 31, and the top plate 23 from the bottom. is there. Each layer and the electrode are adhered and fixed by an adhesive or the like. The first base film 21, the second base film 22, and the top plate 23 are each formed in a rectangular shape or the like. The pressure-sensitive sensor device 10 is disposed in a peripheral region (frame portion) outside the coordinate detection region of the XY plane of the touch panel device 40.

  The pressure-sensitive sensor device 10 is disposed so as to sandwich the elastic body 20 and the elastic body 20 made of a dielectric material disposed between the touch panel device 40 and the housing 52 as shown in FIG. The first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 on the upper side, and the third pressure-sensitive sensor electrode 13 on the lower side. The first pressure sensitive sensor electrode 11 and the second pressure sensitive sensor electrode 12 are formed on the upper surface of the first base film 21, and the shield electrode 14 is formed on the upper surface of the second base film 22.

  In the present embodiment, the elastic bodies 20 constituting the six pressure-sensitive sensor devices 10 are connected to form one frame. That is, one elastic body 20 is shared by the six pressure sensor devices 10. By providing the elastic body 20 in a frame shape, it is possible to prevent the intrusion of dust and the like from the outside into the space 51 between the touch panel device 40 and the housing 52, that is, the space between the touch panel device 40 and the display panel 50. .

  The surface of the top plate 23 becomes an input operation surface 24 on which an input operation is performed by an instruction medium such as a finger. When the input operation surface 24 is pressed with a finger in a pressing direction (z-axis direction downward) perpendicular to the input operation surface 24, the elastic body 20 of the pressure sensor device 10 is contracted, and the pressure sensor device 10 is adhesively fixed. The top plate 23 is moved in the pressing direction.

  Then, the pressure-sensitive sensor device 10 detects a change in the current flowing to the detection unit 1. Thereby, the detection unit 1 can detect that the input operation surface 24 is pressed.

<First Modified Example of Touch Panel Device>
FIG. 9 is an explanatory view showing a first modified example of the touch panel device 40. As shown in FIG. The touch sensor device 30 included in the touch panel device 40 may form the X coordinate touch electrode 31 on one surface of the first base film 21 and form the Y coordinate touch electrode 32 on the other surface. The touch sensor device 30 shown in FIG. 9 can form the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 using one ITO film, and the touch sensor device 30 shown in FIG. , Double-sided ITO film, or double-sided metal mesh film can be used.

<Second Modified Example of Touch Panel Device>
FIG. 10 is an explanatory view showing a second modified example of the touch panel device. The touch panel device 40A has a configuration in which the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 are directly formed under the top plate 23. Therefore, as compared with the touch panel device 40 shown in FIG. 7, the first base film 21 and the second base film 22 may have the size of the shield electrode 14 or so. Since the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 are formed on the same surface as the shield electrode 14, the configuration is simpler than the touch panel device 40.

<Third Modification of Touch Panel Device>
FIG. 11 is an explanatory view showing a third modified example of the touch panel device. The touch panel device 40B arranges the third base film 26 on the elastic body 20, and arranges the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 horizontally on the third base film 26. Furthermore, the fourth base film 27 is disposed on the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12. The shield electrode 14 is disposed on the fourth base film 27. The arrangement of the first base film 21, the second base film 22, the top plate 23, the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 is the same as that of the touch panel device 40 shown in FIG. 8.

<Fourth Modified Example of Touch Panel Device>
FIG. 12 is an explanatory view showing a fourth modified example of the touch panel device. The touch panel device 40C has the same configuration as the touch panel device 40B, except that the shield electrode 14 is disposed on the second base film 22. In the touch panel device 40C, the distance between the shield electrode 14 and the first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 is larger than that of the touch panel device 40B. Thereby, the influence on the first capacitance, the second capacitance, and the third capacitance due to the charge flowing in or out from the outside can be further suppressed, and the pressure-sensitive detection of the pressure-sensitive sensor device 10 is highly sensitive. Can be

<Fifth Modification of Touch Panel Device>
FIG. 13 is an explanatory view showing a fifth modified example of the touch panel device. In the touch panel device 40D, the second pressure-sensitive sensor electrode 12 is disposed on the elastic body 20, the first base film 21 is disposed on the elastic body 20 and the second pressure-sensitive sensor electrode 12, and the first base film 21 is formed. The Y coordinate touch electrode 32 and the first pressure-sensitive sensor electrode 11 are arranged side by side. Furthermore, the X coordinate touch electrode 31 and the shield electrode 14 are arranged side by side on the second base film 22 disposed on the first base film 21. The arrangement of the first base film 21, the second base film 22, the top plate 23, the X coordinate touch electrode 31 and the Y coordinate touch electrode 32 is the same as that of the touch panel device 40 shown in FIG. 8.

  The first pressure-sensitive sensor electrode 11 and the second pressure-sensitive sensor electrode 12 may be disposed on different planes. For example, the first pressure-sensitive sensor electrode 11 may be disposed on the elastic body 20, and the second pressure-sensitive sensor electrode 12 may be disposed on the first base film 21.

The first and second embodiments described above are compared with the method of detecting the capacitance between two pressure-sensitive sensor electrodes facing each other across an elastic body as in the conventional pressure-sensitive sensor device. The pressure-sensitive sensor device according to the present embodiment can detect the pressure with less displacement. That is, high sensitivity of pressure detection of the pressure sensor device can be achieved. As a result, even when the elastic body is designed harder than in the past, the pressure sensitivity can be detected, so that the miniaturization of the pressure sensor device can be achieved.
[Modification]

  In addition, when a pressure sensor apparatus is used as a switch etc., the signal processing part 2 becomes unnecessary. When the change in current flowing into the detection unit 1 exceeds the threshold value, the pressure-sensitive sensor device itself outputs an on signal or an off signal to switch the operation of the electrical device connected to the pressure-sensitive sensor device. It is also good.

  In addition, at least one of the first pressure sensor electrode 11, the second pressure sensor electrode 12, or the third pressure sensor electrode 13 may be used as a touch electrode. Also, the shield electrode 14 may be used as a touch electrode. Thus, the configuration of either the X coordinate touch electrode 31 or the Y coordinate touch electrode 32 can be omitted, and the manufacturing cost of the touch sensor device 30 and the touch panel device 40 can be reduced.

  Furthermore, the present invention is not limited to the above-described embodiment, and it goes without saying that various other applications and modifications can be taken without departing from the scope of the present invention described in the claims.

  For example, the above-described embodiment is a detailed and specific description of the configuration of the apparatus and system in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to one having all the configurations described. Moreover, it is possible to replace a part of the configuration of the embodiment described here with the configuration of another embodiment, and furthermore, to add the configuration of another embodiment to the configuration of one embodiment. It is possible. Moreover, it is also possible to add, delete, and replace other configurations for part of the configurations of the respective embodiments.

  Further, control lines and information lines indicate what is considered to be necessary for the description, and not all control lines and information lines in the product are necessarily shown. In practice, almost all configurations may be considered to be mutually connected.

  DESCRIPTION OF SYMBOLS 1 detection part, 2 signal processing part, 3 1st signal generation part, 4 2nd signal generation part, 10 pressure sensitive sensor apparatus, 11 1st pressure sensitive sensor electrode, 12 2nd pressure sensitive sensor electrode, 13 3rd 3 Pressure-sensitive sensor electrode, 14 shield electrode, 20 elastic body, 21 first base film, 22 second base film, 23 top plate, 24 input operation surface, 30 touch sensor device, 31 X coordinate touch electrode, 32 Y coordinate touch electrode , 40 touch panel device, 50 display panel

Claims (21)

A first pressure sensitive sensor electrode,
A second pressure sensitive sensor electrode spaced apart from the first pressure sensitive sensor electrode;
A third pressure-sensitive sensor electrode spaced apart from the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode;
A first signal generator for applying a signal to the first pressure-sensitive sensor electrode;
And a second signal generation unit that applies a signal to the third pressure-sensitive sensor electrode,
A first electrostatic capacitance is provided between the first pressure sensitive sensor electrode and the third pressure sensitive sensor electrode, and a second electrostatic voltage is provided between the second pressure sensitive sensor electrode and the third pressure sensitive sensor electrode A capacitance and having a third capacitance between the first pressure sensitive sensor electrode and the second pressure sensitive sensor electrode,
A pressure-sensitive sensor device, comprising: a detection unit that detects change amounts of signals output from the first signal generation unit and the second signal generation unit according to changes in the first to third capacitances. A first capacitance generated between the first pressure sensor electrode and the third pressure sensor electrode, and a second capacitance generated between the second pressure sensor electrode and the third pressure sensor electrode The pressure sensitive sensor device according to claim 1 having a charge and discharge cycle of capacitance. The signal applied from the second signal generator to the third pressure-sensitive sensor electrode is in reverse phase to the signal applied from the first signal generator to the first pressure-sensitive sensor electrode. The pressure-sensitive sensor device according to 2. The signal applied from the second signal generator to the third pressure-sensitive sensor electrode is in phase with the signal applied from the first signal generator to the first pressure-sensitive sensor electrode. Pressure-sensitive sensor device according to claim 1. The signal applied from the second signal generator to the third pressure sensitive sensor electrode has a fixed or random phase difference from the signal applied from the first signal generator to the first pressure sensitive sensor electrode The pressure sensitive sensor device according to claim 1. The pressure sensor device according to claim 1, wherein the first signal generator is connected to the third pressure sensor electrode in place of the second signal generator. The pressure-sensitive sensor device according to any one of claims 1 to 6, further comprising a shield electrode for limiting the inflow or outflow of electric charge from the outside to the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode. . The pressure sensitive sensor device according to claim 7, wherein the first pressure sensitive sensor electrode and the second pressure sensitive sensor electrode are disposed at a position closer to the shield electrode than the third pressure sensitive sensor electrode. The pressure-sensitive sensor device according to claim 8, wherein the third pressure-sensitive sensor electrode is disposed at a position closer to the shield electrode than the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode. The pressure sensitive sensor device according to claim 8, wherein the first pressure sensitive sensor electrode and the second pressure sensitive sensor electrode are disposed on the same plane. The pressure sensitive sensor device according to claim 8 or 9, wherein the first pressure sensitive sensor electrode and the second pressure sensitive sensor electrode are disposed on different surfaces. The pressure-sensitive sensor device according to claim 11, wherein the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode are disposed so as to partially overlap with each other. Furthermore, a space maintaining member for maintaining a space between the first pressure sensitive sensor electrode and the third pressure sensitive sensor electrode, and between the second pressure sensitive sensor electrode and the third pressure sensitive sensor electrode The pressure-sensitive sensor device according to any one of claims 1 to 12. The space maintaining member is an elastic body provided between the first pressure sensor electrode and the third pressure sensor electrode, and between the second pressure sensor electrode and the third pressure sensor electrode. The pressure sensor device according to claim 13. The space maintaining member is a place other than between the first pressure sensitive sensor electrode and the third pressure sensitive sensor electrode, and a place other than between the second pressure sensitive sensor electrode and the third pressure sensitive sensor electrode The pressure-sensitive sensor device according to claim 13, which is an elastic body or a spacer provided in The pressure sensor device according to any one of claims 1 to 15, further comprising: a signal processing unit that performs predetermined processing based on a detection signal input from the detection unit. A touch electrode for detecting a touch position, and a pressure-sensitive sensor device;
The pressure sensor device is
A first pressure sensitive sensor electrode,
A second pressure sensitive sensor electrode spaced apart from the first pressure sensitive sensor electrode;
A third pressure-sensitive sensor electrode spaced apart from the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode;
A first signal generator for applying a signal to the first pressure-sensitive sensor electrode;
And a second signal generation unit that applies a signal to the third pressure-sensitive sensor electrode,
A first electrostatic capacitance is provided between the first pressure sensitive sensor electrode and the third pressure sensitive sensor electrode, and a second electrostatic voltage is provided between the second pressure sensitive sensor electrode and the third pressure sensitive sensor electrode A capacitance and having a third capacitance between the first pressure sensitive sensor electrode and the second pressure sensitive sensor electrode,
A touch sensor device, comprising: a detection unit that detects change amounts of signals output from the first signal generation unit and the second signal generation unit according to changes in the first to third capacitances. The touch sensor device according to claim 17, wherein at least one of the first pressure sensor electrode, the second pressure sensor electrode, or the third pressure sensor electrode is used as the touch electrode. And a shield electrode for restricting the inflow or outflow of electric charge from the outside to the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode,
The touch sensor device according to claim 17, wherein the shield electrode is used as the touch electrode. A touch sensor device having a touch electrode for detecting a touch position, a pressure-sensitive sensor device, and a display device;
The pressure sensor device is
A first pressure sensitive sensor electrode,
A second pressure sensitive sensor electrode spaced apart from the first pressure sensitive sensor electrode;
A third pressure-sensitive sensor electrode spaced apart from the first pressure-sensitive sensor electrode and the second pressure-sensitive sensor electrode;
A first signal generator for applying a signal to the first pressure-sensitive sensor electrode;
And a second signal generation unit that applies a signal to the third pressure-sensitive sensor electrode,
A first electrostatic capacitance is provided between the first pressure sensitive sensor electrode and the third pressure sensitive sensor electrode, and a second electrostatic voltage is provided between the second pressure sensitive sensor electrode and the third pressure sensitive sensor electrode A capacitance and having a third capacitance between the first pressure sensitive sensor electrode and the second pressure sensitive sensor electrode,
A detection unit that detects a change amount of signals output from the first signal generation unit and the second signal generation unit according to a change in the first to third capacitances;
The display device displays an image according to the touch position detected by the touch electrode and an output of the detection unit. And a signal processing unit that performs predetermined processing based on a detection signal input from the detection unit.
The information processing apparatus according to claim 20, wherein the signal processing unit controls the image displayed on the display device.

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