JP2017182133A - Electrical capacitance touch panel controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch panel controller which can learn a habit, for example, of an operator about a touching operation and can avoid a disadvantage of repeated touch operations being unaccepted.SOLUTION: The touch panel controller includes: a touch signal generation unit 2 for generating a detection signal showing a change behavior of an electrostatic capacity in an electrical capacitance touch panel 1; a touch evaluation unit 3 for outputting a touch confirmation signal showing that a touching operation has been done based on the result of estimation of the detection signal using a touch threshold value; an estimation unit 5 for presumptively determining which of an appropriate operation and an inappropriate operation the detection signal is based on; and a touch threshold value setting unit 4 for adjusting the touch threshold value to a level where the touch confirmation signal is output to the detection signal if the touch confirmation signal is not output regardless of the determination that the touch operation is appropriate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a control device that detects a touch operation on a capacitive touch panel.

  Patent Document 1 discloses a touch switch control device that determines the presence or absence of an input operation by detecting a touch operation on a touch panel. In this control device, the touch operation in which the detection value of the detection means for detecting the touch operation exceeds the first threshold value is determined as ON, and the detected position is taken out as the touch operation position. If the detection value of the detection means is a value that does not exceed the first threshold but exceeds the second threshold, the touch operation with a long touch operation time is determined to be on, and the arrangement The position is taken out as a touch operation position. However, even when the detection value of the detection means does not exceed the first threshold value but exceeds the second threshold value, the touch operation with a short touch operation time is determined to be off, and the detected position Is not taken out as a touch operation position. By adopting such control, for example, it is possible not only to detect a touch operation with a bare hand whose detection value exceeds the first threshold value during a touch operation, but also to make a long touch operation time while wearing a glove. A touch operation can be detected. Moreover, even if it is possible to detect a touch operation while wearing gloves in this way, a detection signal with a short touch operation time such as when a water droplet is attached or when electric noise is mixed is excluded as a non-touch operation.

JP 2009-181232 A

In the touch panel control device according to Patent Literature 1, the detection signal based on the touch operation is evaluated based on the signal height and the signal width (touch operation time), so that the touch operation with a gloved hand as well as the bare hand is performed. Is also intended to avoid misjudgment due to noise. However, in such a touch panel control device, since it is impossible to distinguish a moth at the time of a touch operation that differs depending on a person, a touch operation that is not evaluated as a valid touch operation can be performed regardless of how many times it is performed. Not evaluated as an operation. In a touch panel device that is repeatedly operated by a person who cannot press the touch panel strongly or does not press the touch panel for a long time, there is a complaint that it cannot be accepted unless the touch operation is devised.
In view of such circumstances, there is a demand for an intelligent touch panel control device that learns an operator's touch operation habit and avoids the problem that the touch operation cannot be accepted many times.

  The capacitance-type touch panel control device according to the present invention includes a touch signal generation unit that generates a detection signal indicating a change behavior of capacitance in the capacitance-type touch panel, and an evaluation result for the detection signal using a touch threshold value. A touch evaluation unit that outputs a touch confirmation signal indicating that a touch operation has been performed based on the above, an estimation unit that estimates whether the detection signal is based on a valid touch operation or an illegal touch operation, and a valid When the touch confirmation signal is not output even though the touch operation is evaluated, the touch threshold for adjusting the touch threshold to a value at which the touch confirmation signal is output with respect to the detection signal. A value setting unit.

  According to this configuration, even if it is estimated that the detection signal is a legitimate touch operation, the touch confirmation signal indicating that the touch operation has been performed by the evaluation using the threshold value is not output. In this case, the touch threshold value is adjusted to a level (value) at which the touch confirmation signal is output by the detection signal. As a result, even if the touch operation (capacitance change behavior) is such that a detection signal for which the touch confirmation signal is not output is generated, after the touch threshold adjustment control is performed, the touch operation is performed. Since the confirmation signal is output, the coordinate position of the touch operation is calculated, and the execution process of the command assigned to the coordinate position is performed. Touch confirmation signal as a result of evaluation using the touch threshold because the touch panel cannot be pressed too strongly even though the touch operation is intended and the fingertip is dry. Will not be output. However, when the touch threshold is adjusted, a touch confirmation signal is output by the same touch operation. Thereby, it is avoided that the touch panel does not react even though the touch operation is repeatedly performed.

  For example, it is the same for two or more times in succession that the user does not operate by mistake but performs the touch operation with the intention of the touch operation with respect to a specific touch panel position (touch switch position). It can be estimated that a detection signal is generated (capacitance change behavior occurs in the touch panel). For this reason, when the touch determination signal is not output even though the detection signal indicating the same change behavior is continuously generated in the touch signal generation unit, the estimation unit Can be assumed to be based on a valid touch operation. In such a situation, when the touch determination signal is not output, the touch threshold is adjusted to the sensitive side so that the touch determination signal is output.

  On the other hand, when the touch confirmation signal is output even though the user does not perform the touch operation with the intention of the touch operation on the position of the specific touch panel (position of the touch switch), the user immediately The touch operation is canceled through an operation such as a cancel button. Therefore, it can be estimated that such a touch operation is improper. Therefore, when the touch operation corresponding to the detection signal that has output the touch confirmation signal is canceled within a predetermined time, the estimation unit estimates that the detection signal is based on an inappropriate touch operation. , Can be configured to adjust the touch threshold. A detection signal that is canceled is likely to have been evaluated by an unintentional touch operation due to a touch threshold that has been adjusted too much to the sensitive side. It is preferable that the threshold value be adjusted to the insensitive side.

  In the detection signal generated by the change behavior of the capacitance due to the touch operation, the signal height and the signal width differ depending on the manner of the user's touch operation. For this reason, it is preferable to evaluate both the signal height and the signal width of the detection signal in order to perform signal evaluation taking into account the user's touch operation characteristics (such as wrinkles) as much as possible. From this, the touch threshold includes a signal height threshold applied to the signal height of the detection signal and a signal width threshold applied to the signal width of the detection signal, The touch evaluation unit may be configured to individually evaluate the detection signal using the signal height threshold and the signal width threshold.

  When a plurality of people operate the same touch panel, particularly in a touch panel arranged at home, there is a high possibility that the operated person includes children, adults, and elderly people, and the touch operations are considerably different. In such a situation, if a touch threshold is adjusted when a certain person (child) operates, it will not be adapted to other persons (old people), and the touch threshold will be adjusted again. there is a possibility. In order to avoid this problem, it is necessary to set a touch threshold value suitable for the person who operates. For this purpose, a user identification unit for identifying a user who performs a touch operation is provided, and the touch threshold value setting unit is configured to adjust the touch threshold value for each user identified by the user identification unit. be able to.

  Identifying the person who operates the touch panel and setting a touch threshold suitable for each person each time results in an excessive processing load when a large number of persons operate. In order to avoid this problem, a user identification unit for identifying a user who performs a touch operation is provided, and the adjustment of the touch threshold calculated by the touch threshold setting unit for the adjustment of the touch threshold is performed. The value is continuously recorded in the adjustment value recording unit for each user identified by the user identification unit, and the touch threshold value setting unit records the adjustment values of all users recorded in the adjustment value recording unit. The touch threshold value may be adjusted based on an average calculation value. In this configuration, instead of managing a touch threshold value suitable for each person operating the touch panel, the detection signal is generated using a common touch threshold value based on an average touch operation of the person operating the touch panel. Since it is evaluated, the processing load is reduced. Thereby, both satisfaction of many people who operate and reduction of the processing load of the control device can be obtained in a balanced manner.

  A user identification unit for identifying a user who performs a touch operation can be easily constructed by using a selection device such as a selection button or a selection switch or an ID reader, but requires a cost for adding a new device, Further, such a pre-operation before the touch operation is troublesome for the user. In order to alleviate such a problem, the user identification unit may be configured to identify a user who is performing a touch operation with reference to the detection signal recorded for each identified user. In this configuration, by referring to the detection signal generated by the change behavior of the capacitance due to the touch operation, the feature of each person's touch operation itself is extracted from the detection signal, and the user is identified from the feature. .

  Similarly, the estimation unit that estimates whether the detection signal is based on a valid touch operation (touch operation intended by the user) or an illegal touch operation (touch operation not intended by the user) also extracts features from the detection signal. From the extracted feature, it can be estimated whether the detection signal is a detection signal due to a valid touch operation or a detection signal due to an illegal touch operation. In particular, by analyzing signal waveform patterns extracted from a plurality of detection signals generated in succession, it is estimated whether the touch operation is performed by the user or whether the operation is performed by the infant without judgment. be able to.

  Capacitance touch panels change their capacitance due to water droplets and so on.For example, when used in a remote control or the like placed in a bathroom or kitchen, the touch panel is reliable when water adheres to the surface of the touch panel. It may stop responding. In particular, when the touch threshold is adjusted to the sensitive side, the problem becomes large. In order to suppress this problem, the capacitive touch panel is provided with surface adhesion water detection means, and when the surface adhesion water detection means detects adhesion water, the touch threshold value setting unit The touch threshold is configured to be adjusted to the insensitive side. In this configuration, if the surface adhering water detection means detects adhering water and the possibility of water droplets adhering to the surface of the touch panel increases, the touch threshold is adjusted to the insensitive side to avoid malfunctions. Even when arranged in a similar manner, a highly reliable touch operation is realized.

It is a functional block diagram explaining the basic composition of a capacitive touch panel control device. It is a schematic diagram explaining the relationship between a detection signal and a touch threshold value. It is a schematic diagram explaining adjustment of a signal height threshold value. It is a schematic diagram explaining adjustment of a signal width threshold value. It is a functional block explaining the structure which provided the user identification function to the basic composition of the electrostatic capacitance type touch panel control apparatus by FIG. It is a functional block diagram which shows one of concrete embodiment of an electrostatic capacitance type touch panel control apparatus. It is a flowchart which shows an example of the touch operation control in an electrostatic capacitance type touch panel control apparatus. It is a flowchart which shows an example of the touch operation estimation process in an electrostatic capacitance type touch panel control apparatus. It is a flowchart which shows an example of the touch operation estimation process which requests | requires touch threshold value adjustment in an electrostatic capacitance type touch panel control apparatus.

  FIG. 1 is a functional block diagram for explaining the basic configuration of a capacitive touch panel control device according to the present invention. An electrostatic capacitance type touch panel control device (hereinafter simply referred to as a control device) has a local capacitance generated by a touch operation on a well-known electrostatic capacitance type touch panel (hereinafter simply referred to as a touch panel) 1. The place (coordinate position) where the touch operation is performed is determined by evaluating the detection signal obtained by converting the change behavior of the signal into an electrical signal. A command or the like assigned to the determined coordinate position is delivered to the next processing step.

  The basic components of this control device are a touch signal generation unit 2, a touch evaluation unit 3, an estimation unit 5, and a touch threshold setting unit 4. The touch signal generation unit 2 generates a detection signal indicating the change behavior of the capacitance in the touch panel 1. Typical examples of detection signals are shown in FIGS. 2, 3, and 4. FIG. 2, 3, and 4, a touch threshold that is a condition value for evaluating the detection signal is shown together with the detection signal. Here, the touch threshold value includes a signal height threshold value that is a condition value related to the signal height of the detection signal and a signal width threshold value that is a condition value related to the signal width of the detection signal. In FIGS. 2, 3, and 4, the signal height threshold is indicated by Th1, and the signal width threshold is indicated by Th2. The signal height threshold and the signal width threshold are set by the touch threshold setting unit 4.

  The touch evaluation unit 3 evaluates the detection signal using a touch threshold, and outputs a touch confirmation signal indicating that a touch operation has been performed based on the evaluation result. In the example shown here, if the height of the waveform portion in which the signal width in the detection signal is larger than the signal width threshold is larger than the signal height threshold, it is regarded as a signal by a touch operation, and the touch confirmation signal is Output. This touch confirmation signal includes the coordinate position of the touch-operated part on the touch panel 1.

  Although it is not necessary to be a basic component of the control device, a command determination unit 93 is shown in FIG. The command determination unit 93 refers to a table indicating commands assigned to coordinate positions (coordinate areas) on the touch panel 1 to be touch-operated, and determines a command based on the touch confirmation signal output from the touch evaluation unit 3. decide.

  The estimation unit 5 estimates whether the generated detection signal is based on a valid touch operation or an illegal touch operation. Here, the legitimate touch operation is a touch operation performed with the intention of the user. For example, since the sensitivity of the touch panel 1 is too sensitive, a detection signal generated by a slight touch or movement of a fingertip or a change in capacitance due to noise such as a water drop is a detection signal generated by a legitimate touch operation. Is not regarded as an unjust touch operation, not a touch operation that is intentionally performed by the user.

  If the touch determination signal is not output as an evaluation result of the detection signal even though the estimation unit 5 estimates that the touch operation is valid, it can be determined that the touch threshold is not appropriate. For this reason, the touch threshold setting unit 4 causes the detection signal to lead to the output of the touch confirmation signal when the touch confirmation signal is not output even though it is estimated that the touch operation is valid. The touch threshold is adjusted so that a correct evaluation result can be obtained.

  For example, in the case where a detection signal indicating a change in electrostatic capacitance generated when the touch panel 1 is pressed with a finger is continuously generated but no touch confirmation signal is output, the touch threshold value ( Signal height threshold and signal width threshold) may be too strict. As shown in FIG. 3, in the first two touch operations, the condition for the signal width threshold is reached, but the condition for the signal height threshold is not reached. If it is determined that the signal height threshold is too high, the touch threshold setting unit 4 adjusts the signal height threshold to be low. As a result, in the third touch operation, both the signal height threshold value and the signal width threshold value are achieved, and a touch confirmation signal is output from the touch evaluation unit 3. Also, as shown in FIG. 4, in the first two touch operations, the condition for the signal height threshold is reached, whereas the condition for the signal width threshold is not reached. If it is determined that the signal width threshold is too narrow for the user, the touch threshold setting unit 4 adjusts the signal width threshold to be low. As a result, in the third touch operation, both the signal height threshold value and the signal width threshold value are achieved, and a touch confirmation signal is output from the touch evaluation unit 3.

  Although not shown in the figure, when both the signal height and the signal width of the detection signal do not reach the threshold condition at all, the interval between two consecutive detection signals that do not reach the threshold condition However, when the operation interval is extremely short or long compared to the operation interval in the normal touch operation, the estimation unit 5 estimates that the touch operation is inappropriate. In this case, the touch threshold setting unit 4 does not adjust the touch threshold.

  In FIG. 1, the “cancel” command determined by the command determination unit 93 is transferred to the estimation unit 5. This “cancel” command cancels a command determined through a previous touch operation, and is input by a touch operation on a cancel button area set on the touch panel 1 or a mechanical switch attached to the touch panel 1. be able to. The estimation unit 5 estimates that the preceding touch operation is an illegal touch operation when the command by the previous touch operation is canceled by a “cancel” command within a predetermined time (for example, 1 to 2 seconds). The unjust touch operation in this case means that a detection signal is generated by the reaction of the touch panel 1 contrary to the user's intention, and the touch confirmation signal is issued. Such an event often occurs when the touch threshold is set to the sensitive side. For this reason, if such an event occurs continuously at least once or preferably twice or more in a short period of time, the touch threshold value setting unit 4 adjusts the touch threshold value to the insensitive side.

  As described above, since the estimation unit 5 may use the past evaluation result by the touch evaluation unit 3 and the detection signal by the touch signal generation unit 2 for estimation, the evaluation result and the history of the detection signal are used for the touch operation. It is recorded in the recording unit 7.

  Next, a basic configuration of a control device that can identify and control a plurality of users who operate the touch panel 1 will be described. A functional block diagram of this control apparatus is shown in FIG. 5, and a user identification unit 6 and a user identification device 60 are added as compared with the control apparatus shown in FIG. Water detection means 8 is provided.

  The user identification unit 6 has a function of identifying a user who performs a touch operation on the touch panel 1. By being identified by the user identification unit 6, it is possible to manage touch operations for each user. For example, the touch threshold set by the touch threshold setting unit 4 described above can be changed for each user, and the touch threshold setting by the touch threshold setting unit 4 is also adjusted for each user. Can do. Alternatively, the adjustment value of the touch threshold value is calculated for each user, and the adjustment value is recorded in the memory area as the adjustment value recording unit. When the touch threshold value is adjusted, the recorded adjustment value is recorded. You may perform using the average calculation value calculated | required by average calculation with. The average calculation value includes an arithmetic average value, a moving average value, a weighted average value, an intermediate value, a mode value, and the like, and an arithmetic average value is usually used. Further, the estimation of the legitimacy or unjustness of the touch operation by the estimation unit 5 can be performed for each user, particularly for adults and children or young people and elderly people.

  There are various user identification methods that can be adopted by the user identification unit 6. The simplest method is to configure a user identification button (a type of user identification device 60) selected by the user with hardware or software, and have the user operate the button before touching. It is also possible to perform user identification using an ID reader and an ID card as the user identification device 60 instead of the user identification button. If the user performs an operation for user identification before the touch operation, handling of the touch panel 1 becomes complicated, and it is not suitable for an operation touch panel of a household device such as an air conditioner or a water heater. As a user identification method that does not place a burden on the user, there is a method of using a user's touch operation trap. Since there is a habit of touch operation depending on the user, the change behavior of the capacitance based on the touch operation is also different. This difference in change behavior affects the waveform of the detection signal. By registering a detection signal based on a typical touch operation of the entire family as a reference signal, user identification can be performed by performing image recognition and pattern recognition on the generated detection signal.

  The surface adhering water detection means 8 is a water detection sensor that can be provided on the upper part of the touch panel 1, and a sensor that detects the presence of water by a change in capacitance or the like is used. When the touch threshold value is set to the sensitive side, malfunctions are likely to occur due to the presence of water. Therefore, when water is detected, the touch threshold value setting unit 4 sets the touch threshold value to the insensitive side. adjust.

  Next, a specific embodiment of the capacitive touch panel control device according to the present invention will be described. FIG. 6 is a functional block diagram of a remote control device including a capacitive touch panel control device equipped with various optional functions. This remote control device is incorporated in a hot water supply system and performs operation / stop and temperature setting. A liquid crystal panel 97 is attached to the lower layer portion of the touch panel 1, and various information is displayed on the liquid crystal panel 97 by image signals generated by the image generation unit 95 based on data from the application program 94. The cooperation between the liquid crystal panel 97 and the touch panel 1 enables the user to give various commands to the hot water supply system. Through the touch operation on the touch panel 1, the touch operation coordinate position calculated in the touch input process is sent to the command determination unit 93. Various commands determined by the command determination unit 93 using the coordinate / command table set by the application program 94 are sent to the application program 94 and used for controlling the hot water supply system.

  Since the functional units related to the capacitive touch panel control device are substantially the same as those shown in FIG. 5, description thereof is omitted here.

Next, an example of specific touch operation control in a specific embodiment of this capacitive touch panel control device will be described using the flowchart shown in FIG.
First, when the user performs a touch operation on the touch panel 1, the capacitance of the touch panel 1 changes (# 01). A detection signal is generated by this change behavior (# 02). It is checked whether the generated detection signal satisfies the signal height determination condition (# 03) and whether the signal width satisfies the signal width condition (# 04). If the signal height threshold is exceeded (Yes branch at # 03) and if the signal width threshold is exceeded (Yes branch at # 04), the touch evaluation unit 3 outputs a touch confirmation signal (#). 05). The command determination unit 93 acquires the coordinate position of the touch panel 1 that has been touched from the touch confirmation signal (# 06). When the command assigned to the acquired coordinate position is determined (# 07), processing based on this command is executed by the program being executed (# 08).

  If the detection signal is below the signal height threshold (No branch at # 03) or below the signal width threshold (No branch at # 04), the detection signal satisfies the current touch threshold condition. If not, check whether the signal is at a level that satisfies the touch threshold condition by changing the touch threshold condition within a predetermined range, that is, whether it is a target for the following evaluation processing (# 11). A simple determination condition for this evaluation target is to set a second threshold value that is lower than the touch threshold value described above. If not subject to evaluation, the process returns to step # 01 to wait for the next touch operation.

  When it becomes an evaluation target, the detection signal is recorded in the memory as the touch operation recording unit 7 as an indefinite detection signal (# 12). Further, the touch operation estimation process result in the touch operation estimation process executed in parallel is fetched (# 13). As described above, the touch operation estimation process is a process for estimating whether the detection signal recorded in step # 12 is based on a valid touch operation or an illegal touch operation. If the captured touch operation estimation processing result is valid (Yes in # 14), it is considered that the touch evaluation unit 3 did not output the touch confirmation signal and that there is a problem with the touch threshold value. Therefore, an adjustment amount of the touch threshold value is calculated so that the detection signal recorded in Step # 12 satisfies the touch threshold value (# 15), and the touch threshold value is adjusted by this adjustment amount (#). 16). Then, it returns to step # 01 and waits for the next touch operation. If the captured touch operation estimation processing result is invalid (No branch at # 14), the recorded detection signal is erased, and the process returns to step # 01 to wait for the next touch operation.

  Next, an example of touch operation estimation processing will be described using the flowchart of FIG. As described above, this touch operation estimation process is performed by continuously performing touch operations, so that the touch operation is regarded as the user touching the touch panel 1 with the intention of operation, and such touch operation is performed. This is a process for requesting adjustment of the touch threshold so as to recognize the above.

  First, a detection signal that is continuously recorded as an indeterminate detection signal (a detection signal that is not accompanied by the output of a touch confirmation signal) is read (# 20). From the read history of the indeterminate detection signal, the indeterminate detection signal recorded within a predetermined short time (the time required for two or more touch operations), that is, the latest indefinitely detected It is checked whether a definite detection signal (for example, two undetermined detection signals) is recorded (# 21). If the indeterminate detection signal has been recorded most recently (Yes in # 21), the user has intentionally performed the touch operation twice, and the touch operation is presumed to be valid. The Next, the corresponding evaluation result of the touch evaluation unit 3 is read from the memory as the touch operation recording unit 7 (# 22). If the reason for the indeterminate detection signal to be evaluated here is the signal height (Yes branch at # 23), a signal height threshold value adjustment request is issued (# 24). Further, it is checked whether or not the reason for the indeterminate detection signal to be evaluated is the signal width (# 25). If the signal width is the signal width (Yes branch at # 25), a signal width threshold adjustment request is made. (# 26). Note that the check at step # 25 is performed even if the check at step # 23 is No branch. Such a touch operation estimation process is performed every time an indeterminate detection signal is recorded in the touch operation recording unit 7. The signal height threshold value adjustment request and the signal width threshold value adjustment request issued in the touch operation estimation process are used in step # 13 of FIG.

  Next, an example of touch operation estimation processing for requesting touch threshold adjustment will be described using the flowchart of FIG. As described above, the touch operation estimation process is performed when the touch operation corresponding to the detection signal that has output the touch confirmation signal is canceled within a predetermined time, and the detection signal is estimated to be based on an inappropriate touch operation. And a process for requesting adjustment of the touch threshold. That is, when the “cancel” command is determined by the command determination unit 93, whether or not to adjust the touch threshold value is determined by touch operation estimation.

  This touch operation estimation process is a process that proceeds with the determination of the “cancel” command by the command determination unit 93 as a trigger. First, the command determination unit 93 checks whether the command is determined. (# 31). When the command is determined, it is temporarily recorded in the memory, and the command is transferred to the application program 94 and the estimation unit 5 (# 32). If the transferred command is a “cancel” command (Yes branch at # 33), substantial processing is started. First, the history of commands recorded in the memory is read (# 34). The time interval between the previously recorded command (previous command) and the currently recorded command (“cancel” command) is calculated (# 35). It is checked whether the calculated time interval is less than a predetermined time set in advance (# 36). If the touch threshold is set on the sensitive side, it may be evaluated as a touch operation just by gently tracing the touch panel 1. Considering this, if the calculated time interval is less than the predetermined time (Yes in # 36), it is assumed that the touch threshold is set to the sensitive side, and the touch operation estimation result is Then, a request for adjusting the touch threshold to the insensitive side is issued (# 37). Note that this touch operation estimation process is simplified for the purpose of explanation. Actually, there is a possibility that a “cancel” operation has been performed in order to cancel a user's erroneous operation. In this case, it is not necessary to adjust the touch threshold to the insensitive side. Therefore, when a normal command and a “cancel” command are repeated a plurality of times in a short time, it is preferable to issue a request to adjust the touch threshold to the insensitive side.

  In the above-described embodiment, each functional unit shown in FIGS. 1, 5, and 6 is divided with emphasis on making the explanation of the control easy to understand. Integration and further division can be done freely within the framework of the present invention.

  Note that the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.

  The present invention can be used for all touch panel control devices using a capacitive touch panel.

1: Touch panel 2: Touch signal generation unit 3: Touch evaluation unit 4: Touch threshold setting unit 5: Estimation unit 6: User identification unit 7: Touch operation recording unit 8: Surface adhering water detection means 60: User identification device 93 : Command determination unit 94: Application program 95: Image generation unit 97: Liquid crystal panel

Claims (9)

A touch signal generation unit that generates a detection signal indicating a change behavior of capacitance in the capacitive touch panel;
A touch evaluation unit that outputs a touch confirmation signal indicating that a touch operation has been performed based on an evaluation result for the detection signal using a touch threshold;
An estimation unit that estimates whether the detection signal is based on a legitimate touch operation or an illegal touch operation;
When the touch confirmation signal is not output despite being evaluated as a valid touch operation, the touch threshold is adjusted to a value at which the touch confirmation signal is output with respect to the detection signal. A capacitive touch panel control device comprising a threshold setting unit.   When the touch signal generation unit does not output the touch confirmation signal even though the touch signal generation unit continuously generates detection signals indicating the same change behavior, the estimation unit determines that the detection signal is valid. The capacitive touch panel control device according to claim 1, which is estimated to be based on a touch operation.   When the touch operation corresponding to the detection signal that has output the touch confirmation signal is canceled within a predetermined time, the estimation unit estimates that the detection signal is based on an inappropriate touch operation, and performs the touch. The capacitive touch panel control device according to claim 1, wherein the threshold value is adjusted.   The touch threshold value includes a signal height threshold value applied to the signal height of the detection signal and a signal width threshold value applied to the signal width of the detection signal, and the touch evaluation unit 4. The capacitive touch panel control device according to claim 1, wherein the detection signal is individually evaluated using the signal height threshold value and the signal width threshold value. 5.   The user identification part which identifies the user who performs a touch operation is provided, The said touch threshold value setting part adjusts the said touch threshold value for every user identified by the said user identification part. Capacitance type touch panel control device given in the paragraph.   A user identification unit for identifying a user who performs a touch operation is provided, and the touch threshold adjustment value calculated by the touch threshold setting unit for adjusting the touch threshold is determined by the user identification unit. The touch threshold value setting unit is recorded in the adjustment value recording unit for each identified user, and the touch threshold value setting unit is configured to record the touch based on an average calculation value of all the user adjustment values recorded in the adjustment value recording unit. The capacitive touch panel control device according to any one of claims 1 to 4, wherein the threshold value is adjusted.   The capacitive touch panel control device according to claim 5 or 6, wherein the user identification unit identifies a user who performs a touch operation with reference to the detection signal recorded for each identified user.   8. The estimation unit according to claim 1, wherein the estimation unit estimates whether the change behavior is based on a valid touch operation or an illegal touch operation with reference to a past detection signal of the identified user. The capacitive touch panel control device described in 1.   The capacitive touch panel includes surface adhering water detection means, and when the surface adhering water detection means detects adhering water, the touch threshold value setting unit is insensitive to the touch threshold value. The capacitive touch panel control device according to any one of claims 1 to 8, which is adjusted to the side.

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