JP2018005659A - Abnormality detection device and abnormality detection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormality detection device and abnormality detection method that can detect defects without making the detect of a touch panel controller latescent.SOLUTION: An abnormality detection device comprises: a signal supply unit 101 that automatically supplies the same pseudo touch signal as a touch signal with respect to a supply line in which a touch signal from a touch panel 12 is supplied to a touch panel controller 13; and an abnormality determination unit 102, in a case where a prescribed touch detection event does not occur in a touch panel controller 13 when the signal supply unit 101 supplies the pseudo signal, determines that the touch panel controller 13 is abnormal. Thereby, even during a period when touch operation with respect to the touch panel 12 has not conducted over a long period of time, an abnormality detection device is configured to automatically supply the pseudo touch signal to the touch panel controller 13, and enable a determination of whether the touch panel controller 13 normally works.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an abnormality detection device and an abnormality detection method, and is particularly suitable for use in an abnormality detection device and an abnormality detection method for detecting an abnormality of a touch panel controller that controls a capacitive touch panel.

  2. Description of the Related Art Conventionally, in various electronic devices (for example, navigation devices, portable terminals, etc.), touch panels provided on the surface of a display are used as input means for performing various input operations. Examples of the type of touch panel include a capacitance method and a resistance film method. Among these, when a user touches a certain position on the panel surface with a capacitive touch panel, the capacitance at the contact position changes and current (hereinafter referred to as “touch signal”) changes. And the touch signal is supplied to the touch panel controller. The touch panel controller generates a touch detection event corresponding to the contact position based on the supplied touch signal.

  Conventionally, a technique has been devised that can solve various problems related to such a capacitive touch panel.

  For example, in the following Patent Document 1, in a touch panel device having a plurality of sensors, second difference information (a predetermined sensor among the plurality of sensors of the touch panel is used as a reference sensor, and the reference sensor and the reference among the plurality of sensors is used. It is obtained by subtracting the second baseline (second difference information when the detection target object is not close to or in contact with the touch panel) from the difference value of the capacitance with another sensor different from the sensor). If the measured value falls below a predetermined negative value, it is determined that the baseline is in an abnormal state, and the first baseline (a plurality of sensors of the touch panel in the case where the detection target does not approach or touch the touch panel) Among them, a technique for controlling to update the difference between the capacitances of adjacent sensors) and the second baseline is disclosed. According to this technique, even when a differential capacitance detection method is used, it is possible to appropriately correct the baseline by determining the abnormal state with high accuracy.

  Patent Document 2 below describes a feature pattern (normal pattern) on the capacitance distribution of the touch panel previously stored in the memory and a feature on the capacitance distribution on the current actual touch panel coordinate system. When the error with the pattern (measurement pattern) exceeds a predetermined threshold, a predetermined error is displayed. When the error does not exceed the predetermined threshold, the measurement pattern is matched with the normal pattern. There is disclosed a technique for updating a touch panel coordinate system-display coordinate system conversion function so that coordinate conversion by a coordinate conversion matrix that moves and rotates is reflected. According to this technology, the touch panel is calibrated using the characteristic pattern on the distribution of the capacitance value of the touch panel that appears by the conductor fixed to the display. The touch panel can be calibrated without requiring a special mechanism.

JP 2014-106829 A JP 2012-14500 A

  Here, in the capacitive touch panel, a problem may occur in the touch panel controller instead of the touch panel body. For example, the processor of the touch panel controller may run out of control or the memory information may be rewritten to an incorrect value due to the influence of external noise, static electricity, radio waves, or the like. In this case, there may be a problem that the touch detection event does not occur in the touch panel controller even though the user performs a touch operation and the touch signal is supplied to the touch panel controller.

  However, the conventional technology cannot detect such a malfunction of the touch panel controller. In particular, the user does not notice the malfunction while the touch operation on the touch panel is not performed for a long time. For this reason, there is a problem with the touch panel controller for some time, and when the user performs a touch operation, the first time the user notices the problem (for example, nothing reacts or an incorrect operation is performed) There was a problem that the defect became latent. Further, even if the user notices a problem, it cannot be determined whether the problem is in the touch panel body or the touch panel controller.

  Note that the invention described in Patent Document 1 detects and corrects an abnormality in the baseline of the capacitance value in the touch panel, and cannot detect a malfunction of the touch panel controller. Further, the invention described in Patent Document 2 performs a calibration process for the coordinate system of the touch panel at the time of inspection before shipment of an electronic device or in response to a calibration start instruction from a user, and detects a malfunction of the touch panel controller. Is not something you can do.

  The present invention has been made to solve the above-described problems, and an object thereof is to enable detection of a malfunction of a touch panel controller without making it latent.

  In order to solve the above-described problem, in the present invention, a pseudo touch signal similar to the touch signal is automatically supplied to a supply line to which a touch signal from the touch panel is supplied to the touch panel controller. Then, when a predetermined touch detection event does not occur in the touch panel controller when the pseudo touch signal is supplied, it is determined that the touch panel controller is abnormal.

  According to the present invention configured as described above, even when the touch operation on the touch panel is not performed for a long time, a pseudo touch signal similar to the touch signal generated when the touch operation is performed is automatically generated. By supplying to the touch panel controller, it can be determined whether or not the touch panel controller itself operates normally. Therefore, according to the present invention, it is possible to detect a malfunction of the touch panel controller without making it latent.

It is a figure which shows the function structural example of the abnormality detection apparatus which concerns on 1st Embodiment of this invention. It is a flowchart which shows an example of the process by the abnormality detection apparatus which concerns on 1st Embodiment of this invention. It is a flowchart which shows an example of the noise determination process by the abnormality detection apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the function structural example of the abnormality detection apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows the selection example of the supply line of the supply destination of the pseudo touch signal by the abnormality detection apparatus which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

[Functional configuration example of abnormality detection device]
FIG. 1 is a diagram illustrating a functional configuration example of an abnormality detection apparatus 100 according to the first embodiment of the present invention. An electronic device 10 illustrated in FIG. 1 is an example of a device in which the abnormality detection device described in the claims is mounted, and is a device that allows a user to operate a touch panel. Examples of the electronic device 10 include a navigation device and a portable terminal (smart phone, tablet terminal, etc.), but are not limited thereto.

  As shown in FIG. 1, the electronic device 10 includes a display 11, a touch panel 12, a touch panel controller 13, and a main microcomputer 14 as its hardware configuration.

  The display 11 displays various information (for example, an application screen including an object that can be touched by the touch panel 12). As the display 11, for example, a liquid crystal display, an organic EL display, or the like is used.

  The touch panel 12 is an example of an operation unit for performing various operations (for example, touch operation of an object displayed on the display 11), and is provided on the surface of the display 11. The touch panel 12 uses a capacitance method.

  As shown in FIG. 1, the touch panel 12 includes a plurality (n pieces) of X electrodes x1 to xn (n is an integer of 1 or more) arranged in parallel in the horizontal direction, each extending linearly in the vertical direction. , Each extending linearly in the horizontal direction, and in a matrix so that a plurality (m) of Y electrodes y1 to ym (m is an integer of 1 or more) arranged in parallel in the vertical direction cross each other. Arranged and configured. Each of the plurality of X electrodes x1 to xn is connected to the touch panel controller 13 via a plurality of supply lines Lx1 to Lxn. Each of the plurality of Y electrodes y1 to ym is connected to the touch panel controller 13 via a plurality of supply lines Ly1 to Lym.

  The touch panel controller 13 controls the capacitive touch panel 12. Specifically, test signals are sequentially sent from the touch panel controller 13 to the X electrodes x1 to xn. In this state, when the user touches the fingertip at a position on the touch panel 12, the capacitance of the electrode at the contact position changes, and a current (touch signal) different from the steady state is generated. It is supplied to the touch panel controller 13 via a supply line connected to the electrode. The touch panel controller 13 generates a touch detection event corresponding to the touch position of the touch panel 12 based on the supplied touch signal, and notifies the main microcomputer 14 of the touch detection event. The main microcomputer 14 that has received the notification of the touch detection event specifies the touch operation (operation position and operation pattern) performed on the touch panel 12 by this touch detection event, and performs application processing according to the specified touch operation. Run.

  The main microcomputer 14 controls the entire electronic device 10. For example, the main microcomputer 14 executes various applications installed in the electronic device 10. At that time, an application screen is displayed on the display 11 or application processing corresponding to a touch operation on the touch panel 12 is executed.

  In the electronic device 10 of the first embodiment, the main microcomputer 14 is provided with an abnormality detection device 100. The abnormality detection device 100 is for detecting an abnormality of the touch panel controller 13 that controls the capacitive touch panel 12. As shown in FIG. 1, the abnormality detection apparatus 100 includes a signal supply unit 101, an abnormality determination unit 102, a reset unit 103, a timer unit 104, a measurement time determination unit 105, and a noise determination unit 106 as its functional configuration. .

  Each of the functional blocks 101 to 106 is realized by operating a program stored in a recording medium such as a RAM, a ROM, or a semiconductor memory included in the main microcomputer 14, for example. A part of each of the functional blocks 101 to 106 may be configured by hardware or a DSP (Digital Signal Processor).

  The signal supply unit 101 automatically supplies a pseudo touch signal similar to the touch signal to a supply line (any of Ly1 to Lym) to which the touch signal from the touch panel 12 is supplied to the touch panel controller 13. Here, “automatically” means that the user does not manually specify the supply timing of the pseudo touch signal, but the signal supply unit 101 actively supplies the pseudo touch signal.

  In the first embodiment, the signal supply unit 101 supplies a pseudo touch signal to a supply line connected to an electrode outside the display display area of the touch panel 12. For example, in the example illustrated in FIG. 1, the Y electrode y <b> 1 on the touch panel 12 is an electrode outside the display display area. In the electronic device 10 according to the first embodiment, the coordinate accuracy of the end portion of the area where the touch can be detected on the touch panel 12 is lower than the other portions, so that the end portion is not located in the display display area. The area of the touch panel 12 where the touch can be detected is larger than the display display area. For this reason, there exists a Y electrode y1 outside the display display area. Then, the signal supply unit 101 turns on the switch SW1 connected to the supply line Ly1 with respect to the supply line Ly1 connected to the Y electrode y1 outside the display display area in the touch panel 12. It is configured to supply a touch signal.

  In the first embodiment, the signal supply unit 101 determines that the measurement time by the timer unit 104 (the time when the touch detection event has not occurred in the touch panel controller 13 as described later) has passed a predetermined time. Each time it is determined by the unit 105, a pseudo touch signal is supplied.

  The abnormality determination unit 102 determines that the touch panel controller 13 is normal when a predetermined touch detection event occurs in the touch panel controller 13 when the signal supply unit 101 supplies a pseudo touch signal to the touch panel controller 13. . On the contrary, when a predetermined touch detection event does not occur in the touch panel controller 13, it is determined that the touch panel controller 13 is abnormal.

  The reset unit 103 resets the touch panel controller 13 when the abnormality determination unit 102 determines that the touch panel controller 13 is abnormal. By resetting the touch panel controller 13, a malfunction that has occurred in the touch panel controller 13 (for example, the processor of the touch panel controller 13 runs out of control due to the influence of external noise, static electricity, radio waves, etc., or the memory information is written to an incorrect value. It is possible to eliminate the problem of being replaced.

  The timer unit 104 measures a time during which no touch detection event occurs in the touch panel controller 13.

  The measurement time determination unit 105 determines whether the measurement time by the timer unit 104 has passed a predetermined time. The predetermined time used at this time is not particularly limited, but an appropriate time (so that an abnormality of the touch panel controller 13 can be detected without applying a load to the main microcomputer 14 and without greatly delaying. For example, it is preferably within a range of 1 to 3 minutes.

  The noise determination unit 106 determines whether or not the touch panel 12 is affected by external noise. A known technique can be used for this determination. For example, when a touch signal is detected by the touch panel controller 13 in a plurality of electrodes in a wider range than when the user touches the fingertip, it can be determined that the touch panel 12 is affected by external noise.

  When the noise determination unit 106 determines that the touch panel 12 is not affected by external noise, the measurement time determination unit 105 is a predetermined value used when determining whether or not the measurement time by the timer unit 104 has passed a predetermined time. The first time is used as the time. On the other hand, when the noise determination unit 106 determines that the touch panel is affected by external noise, the measurement time determination unit 105 is used to determine whether the measurement time by the timer unit 104 has passed a predetermined time. A second time shorter than the first time is used as the predetermined time. As a result, when the touch panel 12 is affected by external noise, the pseudo touch signal supply interval is shortened while the touch detection event is not occurring, and the abnormal touch panel controller 13 that is likely to occur at that time is advanced. Make it detectable.

[An example of processing by the abnormality detection apparatus 100]
FIG. 2 is a flowchart illustrating an example of processing performed by the abnormality detection apparatus 100 according to an embodiment of the present invention. The processing illustrated in FIG. 2 is executed, for example, at the timing when a display screen including an object that can be touched by the touch panel 12 is displayed on the display 11 in the electronic device 10.

  First, the timer unit 104 starts measuring the time when no touch detection event occurs in the touch panel controller 13 (step S202). Next, the timer unit 104 determines whether or not a touch detection event has occurred in the touch panel controller 13 (step S204). If the timer unit 104 determines that a touch detection event has occurred (step S204: Yes), the timer unit 104 resets the measurement time (step S206). And the timer part 104 performs the process after step S202 again.

  On the other hand, when the timer unit 104 determines that the touch detection event has not occurred (step S204: No), the timer unit 104 continues to measure the time when the touch detection event has not occurred (step S208). And the measurement time determination part 105 determines whether the measurement time by the timer part 104 passed predetermined time (step S210). Here, when the measurement time determination unit 105 determines that the measurement time by the timer unit 104 has not passed the predetermined time (step S210: No), the abnormality detection apparatus 100 executes the processing after step S204 again.

  On the other hand, when the measurement time determination unit 105 determines that the measurement time by the timer unit 104 has passed the predetermined time (step S210: Yes), the signal supply unit 101 supplies the supply connected to the electrode y1 outside the display display area. A pseudo touch signal is supplied to the line Ly1 (step S212).

  Then, the abnormality determination unit 102 determines whether or not a predetermined touch detection event has occurred in the touch panel controller 13 (step S214). Here, when the abnormality determination unit 102 determines that a predetermined touch detection event has occurred (step S214: Yes), the abnormality detection device 100 executes the processing subsequent to step S206 again.

  On the other hand, when the abnormality determination unit 102 determines that a predetermined touch detection event has not occurred (step S214: No), the abnormality determination unit 102 adds 1 to the error counter. The error counter used here is stored in a memory (not shown) provided in the main microcomputer 14.

  Thereafter, the reset unit 103 determines whether or not the value of the error counter exceeds a predetermined threshold (step S218). Here, when the reset unit 103 determines that the value of the error counter does not exceed the predetermined threshold value (step S218: No), the abnormality detection apparatus 100 executes the processes after step S206 again.

  On the other hand, when the reset unit 103 determines that the value of the error counter exceeds a predetermined threshold (step S218: No), the reset unit 103 resets the touch panel controller 13 (step S220). And the abnormality detection apparatus 100 complete | finishes a series of processes shown in FIG.

[An example of noise determination processing by the abnormality detection apparatus 100]
FIG. 3 is a flowchart illustrating an example of the noise determination process performed by the abnormality detection apparatus 100 according to the first embodiment of the present invention. The noise determination process shown in FIG. 3 is performed in parallel with the process of FIG.

  First, the noise determination unit 106 determines whether or not the touch panel 12 is affected by external noise (step S302). Here, when the noise determination unit 106 determines that the touch panel 12 is not affected by external noise (step S302: No), the noise determination unit 106 executes the process of step S302 again. On the other hand, when the noise determination unit 106 determines that the touch panel 12 is affected by external noise (step S302: Yes), the measurement time determination unit 105 applies a predetermined process to the determination process of step S210 in the process of FIG. The time is changed from the first time to the second time (step S304). This shortens the supply interval of the pseudo touch signal while the touch detection event does not occur, so that the abnormality of the touch panel controller 13 can be detected early.

  Subsequently, the noise determination unit 106 determines whether or not the touch panel 12 is affected by external noise (step S306). Here, when the noise determination unit 106 determines that the touch panel 12 is affected by external noise (step S306: No), the noise determination unit 106 executes the process of step S306 again. On the other hand, when the noise determination unit 106 determines that the touch panel 12 is not affected by external noise (step S306: Yes), the measurement time determination unit 105 is a predetermined that is applied to the determination process of step S210 in the process of FIG. The time is changed from the second time to the first time (step S308). And the abnormality detection apparatus 100 performs the process after step S302 again.

  According to the first embodiment of the present invention configured as described above, even when the touch operation on the touch panel 12 is not performed for a long time, a pseudo touch similar to the touch signal generated when the touch operation is performed. A signal is automatically supplied to the touch panel controller 13 every time a predetermined time elapses to determine whether or not the touch panel controller 13 itself operates normally (whether or not a predetermined touch detection event occurs). Can do. Therefore, according to 1st Embodiment of this invention, the malfunction of the touchscreen controller 13 can be detected, without making it latent.

  Further, according to the first embodiment of the present invention, when an abnormality of the touch panel controller 13 is detected, the touch panel controller 13 can be automatically restored by resetting the touch panel controller 13. Thereby, even if the touch panel controller 13 is defective before the user performs the touch operation, when the user tries to perform the touch operation, the touch panel controller 13 can be in a normal state.

  In addition, according to the first embodiment of the present invention, the pseudo touch signal is supplied to the supply line Ly1 connected to the Y electrode y1 outside the display display area. The abnormality detection process can be performed in parallel without invalidating the user's touch operation.

  Further, according to the first embodiment of the present invention, the touch panel controller 13 is reset when the value of the error counter exceeds a predetermined threshold value. Only when the abnormality of the touch panel controller 13 is certain, the touch panel controller 13 can be reset.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. 4 and FIG. In the first embodiment, a supply line that supplies a pseudo touch signal is fixed to a predetermined supply line (a supply line outside the display display area). However, in the second embodiment, a supply line that supplies a pseudo touch signal. An example of dynamically changing will be described. The configuration of the second embodiment is effective when all the Y electrodes y1 to ym of the touch panel 12 ′ are in the display display area.

[Functional configuration example of abnormality detection device]
FIG. 4 is a diagram illustrating a functional configuration example of the abnormality detection apparatus 100 ′ according to the second embodiment of the present invention. The electronic device 10 ′ shown in FIG. 4 is different from the electronic device 10 shown in FIG. 1 in that it includes a main microcomputer 14 ′ instead of the main microcomputer 14 and a touch panel 12 ′ instead of the touch panel 12. . The main microcomputer 14 ′ includes an abnormality detection device 100 ′ instead of the abnormality detection device 100. The main microcomputer 14 ′ further includes a display control unit 200. The abnormality detection device 100 ′ is different from the abnormality detection device 100 shown in FIG. 1 in that the abnormality detection device 100 ′ includes a signal supply unit 101 ′ instead of the signal supply unit 101 and further includes an object region determination unit 107.

  The signal supply unit 101 ′ is configured to selectively supply a pseudo touch signal to each of the plurality of supply lines Ly <b> 1 to Lym. Specifically, in the electronic apparatus 10 ′ illustrated in FIG. 4, a plurality of switches SW <b> 1 to SWm are connected to each of the plurality of supply lines Ly <b> 1 to Lym. The signal supply unit 101 ′ is configured to selectively turn on each of the plurality of switches SW <b> 1 to SWm.

  Based on the display control information from the display control unit 200, the object region determination unit 107 determines a display region of objects (for example, buttons, icons, etc.) that can be touched on the display screen of the display 11. The signal supply unit 101 ′ supplies a pseudo touch signal to a supply line connected to an electrode outside the display region of the touch operable object determined by the object region determination unit 107 on the touch panel 12 ′.

The procedure of the process performed by the abnormality detection apparatus 100 ′ according to the second embodiment is different from the process procedure performed by the abnormality detection apparatus 100 described with reference to FIG.
(1) Before the signal supply unit 101 ′ performs the process of supplying the pseudo touch signal in step S212, the object area determination unit 107 determines the display area of the touch-operable object on the display screen of the display 11. I do.
(2) In step S212, the signal supply unit 101 ′ supplies a pseudo touch signal to the supply line connected to the electrode outside the display region of the touch-operable object determined by the object region determination unit 107. .

[Selection example of supply line to supply pseudo touch signal]
FIG. 5 is a diagram illustrating a selection example of a supply line to which a pseudo touch signal is supplied by the abnormality detection apparatus 100 ′ according to the second embodiment of the present invention.

  As already described, in the electronic device 10 ′ according to the second embodiment, a plurality of switches SW <b> 1 to SWm are connected to each of the plurality of supply lines Ly <b> 1 to Lym. The signal supply unit 101 'is configured so that each of the plurality of switches SW1 to SWm can be selectively turned on. In FIG. 5, as a part thereof, a configuration in which a plurality of switches SW1 to SW6 are connected to each of the plurality of supply lines Ly1 to Ly6, and the signal supply unit 101 ′ includes a plurality of switches SW1 to SW6. Each of these is configured to be selectively turned on.

  In FIG. 5, areas 401 and 402 indicated by dotted lines on the touch panel 12 ′ are display areas of the selection buttons 401 and 402 (an example of an object that can be touch-operated) on the display screen of the display 11. Of these, the region 401 is in a position overlapping the Y electrodes y1 to y4. The region 402 is at a position overlapping the Y electrodes y7 to y10.

  In this case, the object region determination unit 107 refers to the display control information from the display control unit 200 that controls to display the display screen including such regions 401 and 402 on the display 11, thereby the Y electrode y1. The region 401 that overlaps with y4 and the region 402 that overlaps with the Y electrodes y7 to y10 are determined as the display regions of the selection buttons 401 and 402 on the display screen of the display 11.

  The signal supply unit 101 ′ then supplies at least one of the supply lines Ly5 and Ly6 connected to the Y electrodes y5 and y6 that do not overlap the regions 401 and 402 determined by the object region determination unit 107. A pseudo touch signal is supplied by switching at least one of the corresponding switches SW5 and SW6 to ON.

  Thus, according to the second embodiment of the present invention, even when all the Y electrodes y1 to ym are in the display display area, the areas 401 and 402 that are the display areas of the selection buttons 401 and 402 are When the touch panel controller 13 actually performs a touch operation on the selection buttons 401 and 402 by supplying a pseudo touch signal to the supply lines Ly5 and Ly6 connected to the Y electrodes y5 and y6 that are not overlapped with each other. It is possible to prevent a similar touch detection event from occurring. That is, it is possible to prevent the application process by the touch operation of the selection buttons 401 and 402 from being performed without the intention of the user.

  In the second embodiment, the pseudo touch signal can be supplied to all the Y electrodes y1 to ym, but the present invention is not limited to this. For example, pseudo touch signals may be supplied to the Y electrodes y1 to ym at intervals of several lines. In this case as well, in the same way as in the second embodiment, among the supply lines that can supply the pseudo touch signal, the Y electrode that is connected to the Y electrode that does not overlap the display area of the touch operable object. Thus, a pseudo touch signal may be supplied.

  In the above embodiments, the touch panel controller 13 is reset when an abnormality is detected in the touch panel controller 13, but the present invention is not limited to this. An alert may be generated when an abnormality of the touch panel controller 13 is detected.

  In each of the above embodiments, the touch panel controller 13 is reset when the value of the error counter exceeds a predetermined threshold, but the present invention is not limited to this. For example, when an abnormality of the touch panel controller 13 is detected even once, the touch panel controller 13 may be reset immediately.

  Further, in each of the above embodiments, a time during which no touch detection event occurs in the touch panel controller 13 is measured, and a pseudo touch signal is supplied to the touch panel controller 13 every time the measurement time passes a predetermined time. However, the present invention is not limited to this. For example, the pseudo touch signal may be periodically supplied to the touch panel controller 13 regardless of the time when the touch detection event has not occurred.

  In addition, each of the above-described embodiments is merely an example of a specific example for carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

DESCRIPTION OF SYMBOLS 10,10 'Electronic device 11 Display 12, 12' Touch panel 13 Touch panel controller 14, 14 'Main microcomputer 100, 100' Abnormality detection apparatus 101, 101 'Signal supply part 102 Abnormality determination part 103 Reset part 104 Timer part 105 Measurement time determination Unit 106 noise determination unit 107 object region determination unit 200 display control unit

Claims (7)

An abnormality detection device for detecting an abnormality of a touch panel controller that controls a capacitive touch panel,
A signal supply unit that automatically supplies a pseudo touch signal similar to the touch signal to a supply line in which a touch signal from the touch panel is supplied to the touch panel controller;
An abnormality determining unit that determines that the touch panel controller is abnormal when a predetermined touch detection event does not occur in the touch panel controller when the signal supply unit supplies the pseudo touch signal. A featured abnormality detection device. The abnormality detection device according to claim 1, further comprising: a reset unit that resets the touch panel controller when the abnormality determination unit determines that the touch panel controller is abnormal. The abnormality detection device according to claim 1, wherein the signal supply unit supplies the pseudo touch signal to the supply line connected to an electrode outside the display display area in the touch panel. . The signal supply unit is configured to be able to selectively supply the pseudo touch signal to each of the plurality of supply lines,
An object area determination unit that determines a display area of a touch-operable object on a display screen of the display;
The signal supply unit supplies the pseudo touch signal to the supply line connected to an electrode at a position that does not overlap the touch-operable object determined by the object region determination unit in the touch panel. The abnormality detection device according to claim 1, wherein: A timer unit for measuring a time when no touch detection event occurs in the touch panel controller;
A measurement time determination unit that determines whether or not the measurement time by the timer unit has passed a predetermined time; and
5. The signal supply unit supplies the pseudo touch signal every time the measurement time determination unit determines that the measurement time by the timer unit has passed a predetermined time. 6. The abnormality detection device according to claim 1. A noise determination unit for determining whether or not the touch panel is affected by external noise;
The measurement time determination unit, when the noise determination unit determines that the touch panel is affected by external noise, and when the noise determination unit determines that the touch panel is not affected by external noise 6. The method according to claim 5, wherein a second time shorter than the first time used for the first time is used as the predetermined time, and it is determined whether or not the time measured by the timer unit has passed the predetermined time. Anomaly detection device. An abnormality detection method for detecting an abnormality of a touch panel controller that controls a capacitive touch panel,
A supply process in which a signal supply unit of the abnormality detection device automatically supplies a pseudo touch signal similar to the touch signal to a supply line through which a touch signal from the touch panel is supplied to the touch panel controller;
When the predetermined touch detection event does not occur in the touch panel controller when the abnormality determination unit of the abnormality detection device supplies the pseudo touch signal to the signal supply unit, the touch panel controller is abnormal. An abnormality detection method comprising: an abnormality determination step for determining.