JP2010044730A - Touch panel inspection device and touch panel inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten an inspection time while suppressing occurrence of flaws in a touch panel. <P>SOLUTION: A touch panel inspection device 100 is provided with: an insulated substrate 108 disposed on the touch panel 101; a plurality of electrodes 105 generated on the surface of the touch panel 101 side of the insulated substrate 108; and a switch 109 which grounds the electrodes 105 independently from one another. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a touch panel inspection device and a touch panel inspection method.

  In recent years, touch panels have been introduced as input interfaces on display screens of various electronic devices such as mobile phones, personal computers (PCs), and game machines. As a touch panel system, there are various systems such as a capacitive system, a resistive film system, a surface acoustic wave system, and an optical system.

  Capacitance method means that each pixel that makes up the screen of the touch panel functions as a capacitor, and when the finger touches the screen, it detects that the capacitance has changed, and information on the change in capacitance and its position. In this method, coordinate information is read out.

  FIG. 11 shows a capacitive touch panel 301. As illustrated in FIG. 11, a touch panel 301 and a screen 303 are sequentially stacked on a liquid crystal screen 304 of an electronic device. The capacitive touch panel 301 includes a transparent electrode portion such as ITO (Indium Tin Oxide) and an insulator portion. The touch panel 301 can function even when attached to a dielectric such as glass or plastic. Therefore, glass or plastic used as a protective material for the liquid crystal screen 304 can be used for the screen 303. For this reason, much higher durability can be realized as compared with the resistive touch panel.

  When the finger touches the surface of the screen 303, the touch panel 301 outputs the contact information and the position coordinates of the surface of the screen 303. Various inputs can be made by linking these information and information displayed on the liquid crystal screen 304.

  Furthermore, the touch panel 301 can be input by a gesture operation in which a specific meaning is set depending on how a specific finger is moved. There are various types of gesture operations such as a tap using one finger, a flick, and a zoom using two fingers. For example, when an icon is displayed on the liquid crystal screen 304, the tap can be set to select the icon by tapping the screen 303 once, that is, to correspond to a click on the mouse. Further, the flick can be set such that an image displayed on the liquid crystal screen 304 is switched by an operation of touching the screen 303 with a finger. Furthermore, the image displayed on the liquid crystal screen 304 can be made to correspond to enlargement and reduction, respectively, by touching the screen with two fingertips, the thumb and the index finger, and expanding or narrowing.

  FIG. 12 is a cross-sectional view showing the operation of the touch panel 301 with a pseudo finger. As the pseudo finger, one in which a conductor portion 307 is attached to the tip of a cylindrical member 306 having a size similar to that of a finger is used. By placing the pseudo finger on the screen 303 and grounding the conductor portion 307, it can be simulated that the touch panel 301 is touched at the position where the pseudo finger is mounted.

  In the resistive film type touch panel, a thin film is pasted on a substrate such as glass or plastic via a very small spacer. Electrode grids made of ITO are provided on the surfaces where the substrate and the film face each other, and a voltage is applied to each electrode grid of the opposed substrate and film. In the untouched state, the two electrodes facing each other by the minute spacer are not in contact with each other, so that no current flows. On the other hand, when the surface of the touch panel is touched, the film surface at the touched position bends to the opposite substrate side by the pressure. As a result, the electrode on the film side comes into contact with the electrode on the substrate surface side at a position where the film side electrode faces, and electricity flows there. And the touched position on the film surface is detected by measuring the voltage division ratio by the resistance of the electrodes on the substrate surface and the film surface.

  FIG. 13 shows a resistive film type touch panel 311. The resistive touch panel 311 is different from the capacitive touch panel 301 in that a screen 303 and a touch panel 311 are sequentially stacked on a liquid crystal screen 304 of an electronic device. Since the touch panel 311 detects the touched position by measuring the resistance of the electrode as described above, even if the touched surface is a finger-like surface, it is a point contact like a pen tip. It doesn't matter. In the resistive film method, a gesture operation is possible as in the capacitance type.

  As a technique for inspecting a touch panel, in Patent Document 1, a touch panel is placed on a stage, a pen member dedicated to the touch panel is fixed to the tip of an arm member, and the tip of the pen member is placed on the surface of the touch panel. It describes that the height of the rail is adjusted and fixed to the column member with a screw member.

JP 2003-303051 A

  However, in the technique described in Patent Document 1, since the pen member is applied to the touch panel, the touch panel surface may be damaged. Moreover, since the pen member is mechanically operated, there is a problem that inspection time is required.

The touch panel inspection apparatus according to the present invention is
An insulating substrate disposed on the touch panel;
A plurality of electrodes formed on the touch panel side surface of the insulating substrate;
A switching unit for grounding each of the plurality of electrodes independently of each other;
It is provided with.

The touch panel inspection method according to the present invention includes:
A step of disposing an insulating substrate having a plurality of electrodes on the touch panel so that the electrodes are on the touch panel side;
A step of grounding the plurality of electrodes independently from each other by a switching unit;
It is characterized by including.

  In the touch panel inspection device and the touch panel inspection method of the present invention, the switching unit grounds each of the plurality of electrodes independently of each other. For example, in the case where the touch panel to be inspected is an electrostatic capacity type, when an electrode is grounded on the touch panel, the same signal as that when touched is generated at a portion facing the electrode on the touch panel. Thereby, the touch panel can be detected as touched at a position facing the grounded electrode. Therefore, a touch operation can be simulated on the touch panel by grounding each electrode independently by the switching unit in a state where a plurality of electrodes are arranged in advance on the touch panel. According to such a touch panel inspection device and a touch panel inspection method, it is not necessary to touch the touch panel when reproducing a touch operation, so that it is possible to reduce the occurrence of scratches on the touch panel surface due to the touch. Furthermore, since the touch operation can be electrically simulated, the time required for the touch operation can be shortened.

The touch panel inspection apparatus according to the present invention is
An insulating substrate disposed on the touch panel;
A plurality of piezoelectric elements formed on the touch panel side surface of the insulating substrate;
A switching unit that inputs drive signals to each of the plurality of piezoelectric elements independently of each other;
It is provided with.

The touch panel inspection method according to the present invention includes:
Disposing an insulating substrate having a plurality of piezoelectric elements on the surface thereof on the touch panel such that the piezoelectric elements are on the touch panel side;
A step of inputting a plurality of piezoelectric elements independently of each other by a switching unit;
It is characterized by including.

  In the touch panel inspection apparatus and the touch panel inspection method of the present invention, the switching unit inputs drive signals to each of the plurality of piezoelectric elements independently of each other. On the touch panel, the piezoelectric element expands in the thickness direction when a drive signal is input, and touches the facing part of the touch panel. Accordingly, the touch panel can be detected as touched at a position facing the piezoelectric element to which the drive signal is input. Therefore, in a state where a plurality of piezoelectric elements are arranged on the touch panel in advance, the touch operation can be simulated on the touch panel by inputting drive signals to the respective piezoelectric elements independently from each other by the switching unit. According to such a touch panel inspection device and a touch panel inspection method, it is not necessary to move the piezoelectric element in a horizontal direction with respect to the touch panel when reproducing a touch operation, so that the generation of scratches on the surface of the touch panel during the inspection can be reduced. Furthermore, since the touch operation can be electrically simulated, the time required for the touch operation can be shortened.

  ADVANTAGE OF THE INVENTION According to this invention, the touch panel test | inspection apparatus and touch panel test | inspection method of a structure suitable for shortening test | inspection time are implement | achieved, suppressing the crack generation | occurrence | production of a touch panel.

  Hereinafter, preferred embodiments of an inspection apparatus according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same reference numerals are assigned to the same elements, and duplicate descriptions are omitted.

(First embodiment)
FIG. 1 is a cross-sectional view showing a first embodiment of an inspection apparatus according to this embodiment. FIG. 2 is a plan view showing the first embodiment of the inspection apparatus according to the present embodiment. FIG. 3 is a perspective view showing an inspection method in the present embodiment.

  The touch panel inspection apparatus 100 includes an insulating substrate 108 disposed on the touch panel 101, a plurality of electrodes 105 formed on the surface of the insulating substrate 108 on the touch panel 101 side, and a switch that grounds each of the plurality of electrodes 105 independently of each other. 109. In the present embodiment, the touch panel 101 is a capacitive type.

  As shown in FIG. 1, a switch 109 is connected to each electrode 105. A ground line 110 is connected to the switch 109. By switching between grounding and cutting by the switch 109, the electrodes 105 can be grounded independently of each other. The grounded electrode 105 generates the same signal as when it is touched at a portion facing the electrode 105. Therefore, when the electrode 105 is grounded in a state where the insulating substrate 108 is arranged on the touch panel 101 such that the plurality of electrodes 105 are on the touch panel 101 side, the touch panel 101 is positioned to face the grounded electrode 105. Can be detected as touched.

  As shown in FIG. 2, the plurality of electrodes 105 are arranged on the insulating substrate 108 so as not to overlap each other. The electrodes 105 are spread so as to be substantially the same area as the touch panel 101 area (see FIG. 1). Thereby, the touch operation can be simulated at any position on the touch panel 101, and the entire surface of the touch panel 101 can be inspected. The plurality of electrodes 105 are flush with each other. Thereby, the touch panel 101 and the plurality of electrodes 105 can be in uniform contact with each other, and the detection accuracy of the touch panel 101 becomes higher.

  The surface of the electrode 105 that is in contact with the insulating substrate 108 is circular with a finger size. The size of the electrode 105 is preferably about the same as the area of the finger to be touched, and a circle having a diameter of about 6 mm to 12 mm is preferable.

  With reference to FIG. 3, a touch panel inspection method according to the present embodiment will be described. Note that FIG. 3 shows a state before the touch panel inspection apparatus 100 is arranged on the touch panel 101, and the ground line 110 and the switch 109 from the electrode 105 are omitted.

  In the touch panel inspection method according to the present embodiment, first, as shown in FIG. 3, an insulating substrate 108 having a plurality of electrodes 105 on the surface is disposed on the touch panel 101 so that the electrodes 105 are on the touch panel 101 side.

  Next, the plurality of electrodes 105 are switched between grounding and cutting. By touching only the electrode 105 at the position desired to be touched by the switch 109 on the back side of the insulating substrate 108, the touch operation can be simulated at the position desired to be touched on the touch panel 101.

  Thereby, it can be inspected whether it was detected that the touch panel 101 located at a position corresponding to the grounded electrode 105 was touched.

  The plurality of electrodes 105 may be grounded for a predetermined time at each set timing. By grounding the electrodes 105 individually, a plurality of touch operations, continuous touch operations, and gesture operations can be simulated. For example, when it is desired to touch in order, after the ground of the electrode 105 grounded at the position to be touched is released, the electrode 105 at the position to be touched next is grounded.

  As a method of sequentially grounding, there are a mechanical method and an electrical method. In addition, when grounding electrically while controlling using a personal computer or the like, the grounding can be stably performed at a high speed without requiring a movable part.

  Furthermore, as shown by the arrows in FIG. 4, when the electrodes 105a, 105b, and 105c are successively grounded sequentially, an operation of tracing a finger like a flick can be simulated. Thereby, the inspection test about the function with respect to gesture operation of the touch panel 101 is also realizable with reproducibility.

  Furthermore, as shown by the arrows in FIG. 5, when the electrodes 105d and 105e are grounded at the same time and then switched to grounding to the electrodes 105f and 105g, the operation of spreading the finger can be simulated. On the other hand, in order to simulate the action of narrowing the finger, the electrodes 105f and 105g may be grounded at the same time and then switched to grounding to the electrodes 105d and 105e.

  As described above, by arbitrarily changing the position of the electrode 105 to be grounded, the timing of grounding, the grounding time, etc., and setting the grounding conditions of each electrode 105 in advance, it is possible to perform inspections simulating various finger operations. .

The effect of this embodiment will be described.
The touch panel inspection apparatus 100 includes an insulating substrate 108 disposed on the touch panel 101, a plurality of electrodes 105, and a switch 109 that grounds each of the plurality of electrodes 105 independently of each other.

  In this embodiment, the switch 109 grounds each of the plurality of electrodes 105 independently of each other. In the capacitive touch panel 301, when the electrode 105 is grounded, the touch panel 301 generates a signal that is the same as that in the case where the touch is made in a portion facing the electrode 105. Accordingly, the touch panel 101 can be detected as touched at a position facing the grounded electrode 105. Therefore, a touch operation can be simulated on the touch panel 101 by grounding each electrode 105 independently of each other by the switch 109 in a state where the plurality of electrodes 105 are arranged on the touch panel 101 in advance.

  Therefore, in the touch panel inspection device 100 and the touch panel inspection method of the present embodiment, it is not necessary to touch the touch panel 101 when reproducing the touch operation, so that the occurrence of scratches on the surface of the touch panel 101 due to the touch can be reduced. Furthermore, since the touch operation can be electrically simulated, the time required for the touch operation can be shortened.

  In this embodiment, since the insulating substrate 108 is disposed on the touch panel 101 and then the inspection is performed, the insulating substrate 108 functions as a protective material from the outside on the touch panel 101, and the touch panel 101 surface is damaged. Can be further suppressed.

  In the technique described in Patent Document 1, since the pen member is mechanically operated, a highly accurate and expensive machine is required to realize a three-dimensional finger movement. On the other hand, in the touch panel inspection apparatus 100, a three-dimensional finger movement can be simulated by disposing the insulating substrate 108 including the plurality of electrodes 105 on the touch panel 101 and setting the grounding condition of the electrodes 105. It does not require a high-precision and expensive machine.

  Further, when inspecting by directly touching a capacitive touch panel with a finger, it is difficult to inspect because the surface state of the finger differs depending on the person. In addition, since it is difficult for a person to touch the same position with high reproducibility, there is a problem that it is difficult to perform reproducible inspection. On the other hand, according to the touch panel inspection apparatus 100 and the touch panel inspection method in the present embodiment, it is only necessary to ground the electrode 105 at the position to be touched, and the touch can be stably performed with high reproducibility.

(Second Embodiment)
FIG. 9 is a plan view showing a second embodiment of the touch panel inspection apparatus 200 in the present embodiment. In the first embodiment, the electrode 105 having the same size as the finger is used, but in the second embodiment, a plurality of fine electrodes 205 smaller than the surface area of the electrode 105 are used, and other structures are the same as those of the touch panel inspection apparatus 100 It is.

  As shown in FIG. 9, in the touch panel inspection apparatus 200, fine electrodes 205 are arranged in a matrix on an insulating substrate.

  The fine electrode 205 is smaller than the area of the finger to be touched. The size and shape of the fine electrode 205 itself can be set arbitrarily.

  As shown in FIG. 9, a set of a plurality of fine electrodes 205 occupying a region approximately the same as the area of a finger to be touched is defined as an electrode group 111. That is, the position to be touched is a predetermined area including a plurality of fine electrodes 205.

  The touch panel inspection apparatus 200 can sequentially ground the electrode group 111 composed of a plurality of fine electrodes 205 that occupies a region approximately the same as the area of a finger to be touched. Thereby, a touch operation can be simulated.

  In the touch panel inspection method according to this embodiment, as in the above-described embodiment, the insulating substrate 108 having a plurality of fine electrodes 205 on the surface is disposed on the touch panel 101 so that the fine electrodes 205 are on the touch panel 101 side (see FIG. 10).

  Next, a plurality of fine electrodes 205 are sequentially grounded along a specific line. In other words, the grounding and cutting of the plurality of fine electrodes 205 are respectively switched. The switch 109 connected to each of the fine electrodes 205 included in the electrode group 111 at the position to be touched grounds each of the fine electrodes 205 included in the electrode group 111 to simulate a touch operation. That is, when a touch operation is simulated, all of the plurality of fine electrodes 205 included in the electrode group 111 are grounded.

  Thereby, it can be inspected whether it was detected that the touch panel 101 at the position corresponding to the grounded electrode group 111 was touched.

Further, the plurality of fine electrodes 205 are sequentially grounded for a predetermined time at each set timing. That is, it is possible to simulate a gesture operation with a smooth movement by setting each of the plurality of fine electrodes 205 constituting the electrode group 111 to sequentially switch the ground.
Other effects are the same as in the above embodiment.

  The inspection apparatus according to the present invention is not limited to the above embodiment, and various modifications are possible.

  For example, in the above embodiment, the case where the shape of the electrode 105 is circular has been described. However, as shown in FIG. 6, the electrode 105 may be square, rectangular, or elliptical.

  In the above-described embodiment, an example in which the electrode 105 is disposed on the entire surface of the touch panel 101 has been described. However, the electrode 105 may be disposed only on a portion to be inspected. For example, as shown in FIG. 7, only one electrode 105 may be disposed only at the center portion of the insulating substrate 108, and as shown in FIG. 8, the electrode 105 may be disposed only around the insulating substrate 108. . Thereby, the inspection time can be shortened.

  In the above embodiment, the example using the insulating substrate 108 has been described. However, an insulating flexible rubber-like sheet may be used. In this case, since the rubber-like sheet is flexible, the adhesion with the touch panel is improved, and the gap between the electrode and the touch panel can be reduced. Or what formed the electrode on the film-like flexible cable and affixed on the insulated substrate may be used.

(Third embodiment)
FIG. 14 is a plan view showing a third embodiment of the touch panel inspection apparatus 400 in the present embodiment. In the first embodiment, the electrode 105 is grounded by the switch 109, but in the touch panel inspection apparatus 400, a drive signal is input to the piezoelectric element 405 by the switch 409. Other structures are the same as those of the touch panel inspection apparatus 100. In the first embodiment, the touch operation is simulated at a position facing the electrode 105 grounded by the switch 109. In the present embodiment, the touch operation is opposed to the piezoelectric element 405 to which the drive signal is input by the switch 409. The touch operation is simulated by the position. Since other touch panel inspection methods are the same as those in the first embodiment, description thereof will be omitted.

  As shown in FIG. 14, the touch panel inspection apparatus 400 includes an insulating substrate 108 disposed on the touch panel 401, a plurality of piezoelectric elements 405 formed on the surface of the insulating substrate 108 on the touch panel 401 side, and the insulating substrate 108. And a switch 409 for inputting drive signals to the plurality of piezoelectric elements 405 independently of each other. Drive signals can be input to the piezoelectric element 405 independently of each other by the switch 409. The touch panel 401 in this embodiment is a resistive film type.

  When a voltage is applied by the switch 409, the piezoelectric element 405 can expand and contract in the thickness direction in accordance with the input drive signal. As shown in FIG. 14, the piezoelectric element 405 a to which the drive signal extending in the thickness direction is input extends in the direction of the touch panel 401 and is in contact with the surface of the touch panel 401 in the facing portion of the touch panel 401.

  As described above, the capacitive touch panel 101 uses the detection of the capacitance change of the grounded electrode 105. On the other hand, the resistive touch panel 401 can detect that the surface of the touch panel 401 is pressed by the piezoelectric element 405.

  Therefore, according to the touch panel inspection apparatus 400 of the present embodiment, the operation of pressing the surface of the touch panel 401 is reproduced by applying a voltage to the piezoelectric element 405 by the switch 409 and inputting a drive signal to extend the piezoelectric element 405. it can. Therefore, in a state where a plurality of piezoelectric elements 405 are arranged on the touch panel 401 in advance, a touch signal can be simulated on the touch panel 401 by inputting drive signals to the respective piezoelectric elements 405 independently of each other by the switch 109. it can.

  According to the touch panel inspection device 400, since it is not necessary to move the piezoelectric element 405 in the horizontal direction with the touch panel 401 when reproducing the touch operation, it is possible to reduce the occurrence of scratches on the surface of the touch panel 401 during the inspection. Furthermore, since the touch operation can be electrically simulated, the time required for the touch operation can be shortened.

  In addition, since the expansion and contraction of the piezoelectric element 405 can be controlled by controlling the voltage applied to the piezoelectric element 405, the pressure applied to the touch panel 401 can be appropriately adjusted.

  In the above-described embodiment, the example in which the piezoelectric element 405 is disposed on the entire surface of the touch panel 401 has been described. However, the piezoelectric element 405 may be disposed only in a portion to be inspected. Thereby, the inspection time can be shortened. Further, the size of the piezoelectric element 405 is not particularly limited, but may be, for example, the same size as the area of a finger to be touched. In that case, a circular shape having a diameter of about 6 mm to 12 mm is preferable.

  Further, the piezoelectric element 405 may be composed of a plurality of piezoelectric elements having a smaller surface area. The touch panel inspection method in this case can also be performed in the same manner as in the above embodiment. Other effects are the same as in the above embodiment.

  In the above embodiment, an example in which the touch panel 401 is a resistive film type has been described, but a surface acoustic wave type may be used.

  Moreover, although the said embodiment demonstrated for the touch panel which is a transparent input device, it is applicable also to the non-transparent input device which works on the same principle like the touchpad used for PC etc.

It is sectional drawing which shows 1st Embodiment of the inspection apparatus in this embodiment. It is a top view showing a 1st embodiment of an inspection device in this embodiment. It is a perspective view which shows the inspection method in this embodiment. It is a top view showing a 1st embodiment of an inspection device in this embodiment. It is a top view showing a 1st embodiment of an inspection device in this embodiment. It is a top view which shows the modification of the test | inspection apparatus in this embodiment. It is a top view which shows the modification of the test | inspection apparatus in this embodiment. It is a top view which shows the modification of the test | inspection apparatus in this embodiment. It is a top view which shows 2nd Embodiment of the inspection apparatus in this embodiment. It is sectional drawing which shows 2nd Embodiment of the test | inspection apparatus in this embodiment. It is sectional drawing which shows the conventional touch panel. It is sectional drawing which shows touch-panel operation with a pseudo finger. It is sectional drawing which shows the conventional resistive film type touchscreen. It is sectional drawing which shows 3rd Embodiment of the test | inspection apparatus in this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Touchscreen inspection apparatus 200 Touchscreen inspection apparatus 400 Touchscreen inspection apparatus 101 Touchscreen 401 Touchscreen 405 Piezoelectric element 405a Piezoelectric element 105 Electrode 105a-f Electrode 108 Insulating substrate 109 Switch 409 Switch 110 Ground line 111 Electrode group 205 Fine electrode

Claims (17)

An insulating substrate disposed on the touch panel;
A plurality of electrodes formed on the touch panel side surface of the insulating substrate;
A switching unit for grounding each of the plurality of electrodes independently of each other;
A touch panel inspection apparatus comprising: The touch panel inspection apparatus according to claim 1,
The switching unit grounds a plurality of electrodes at a set timing for a predetermined time. In the touch panel inspection apparatus according to claim 1 or 2,
The touch panel inspection apparatus according to claim 1, wherein a surface area of one of the electrodes is approximately the same as an area of a finger to be touched. The touch panel inspection device according to claim 3,
The said electrode consists of a some fine electrode smaller than the said surface area, The touch-panel test | inspection apparatus characterized by the above-mentioned. The touch panel inspection apparatus according to any one of claims 1 to 4,
The touch panel is a capacitance type touch panel inspection apparatus. The touch panel inspection apparatus according to any one of claims 1 to 5,
The touch panel inspection apparatus, wherein the electrodes are formed flush with each other. A step of disposing an insulating substrate having a plurality of electrodes on the touch panel so that the electrodes are on the touch panel side;
A step of grounding the plurality of electrodes independently from each other by a switching unit;
A touch panel inspection method comprising: The touch panel inspection method according to claim 7,
The said electrode consists of a some fine electrode smaller than the surface area of this electrode, The touch-panel inspection method characterized by the above-mentioned. The touch panel inspection method according to claim 8,
The step of grounding includes
A touch panel inspection method comprising sequentially grounding the plurality of fine electrodes along a specific line. An insulating substrate disposed on the touch panel;
A plurality of piezoelectric elements formed on the touch panel side surface of the insulating substrate;
A switching unit that inputs drive signals to each of the plurality of piezoelectric elements independently of each other;
A touch panel inspection apparatus comprising: The touch panel inspection apparatus according to claim 10,
The touch panel inspection apparatus, wherein the switching unit inputs a drive signal for a predetermined time at a timing set to each of the plurality of piezoelectric elements. The touch panel inspection apparatus according to claim 10 or 11,
The touch panel inspection apparatus, wherein the surface area of one of the piezoelectric elements is approximately the same as the area of a finger to be touched. The touch panel inspection apparatus according to claim 12,
The touch panel inspection apparatus, wherein the piezoelectric element includes a plurality of piezoelectric elements smaller than the surface area. The touch panel inspection apparatus according to claim 10,
The touch panel is either a resistive film type or a surface acoustic wave type, and is a touch panel inspection device. Disposing an insulating substrate having a plurality of piezoelectric elements on the surface thereof on the touch panel such that the piezoelectric elements are on the touch panel side;
A step of inputting drive signals to the plurality of piezoelectric elements independently from each other by a switching unit;
A touch panel inspection method comprising: The touch panel inspection method according to claim 15,
The touch panel inspection method, wherein the piezoelectric element includes a plurality of fine piezoelectric elements smaller than a surface area of the piezoelectric element. The touch panel inspection method according to claim 16,
The step of inputting the drive signal includes:
A touch panel inspection method, wherein a driving signal is sequentially input to the plurality of fine piezoelectric elements along a specific line.

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