JP6664252B2 - Capacitive touch panel controller - Google Patents

Description

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

  Patent Literature 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, a touch operation in which the detection value of the detection means for detecting the touch operation exceeds the first threshold value is determined to be on, and the detected position is extracted as the touch operation position. Further, when the detection value of the detection means does not exceed the first threshold value but exceeds the second threshold value, a touch operation having a long touch operation time of the touch operation is determined to be on, and the arrangement thereof is determined. The position is taken out as the 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 whose touch operation time is short is determined to be off, and the detection position is determined. Is not taken out as a touch operation position. By adopting such a control, for example, not only a touch operation by a bare hand whose detected value exceeds the first threshold value during a touch operation can be detected, but also a touch operation time is long with a gloved state. Touch operation can be detected. Moreover, even if the touch operation with gloves can be detected in this way, a detection signal with a short touch operation time, such as when water droplets are attached or electric noise is mixed, is excluded as a non-touch operation.

JP 2009-181232 A

The touch panel control device according to Patent Literature 1 evaluates a detection signal based on a touch operation based on a signal height and a signal width (touch operation time), so that not only a touch operation with a bare hand but also a touch operation with a gloved state is performed. And is intended to avoid erroneous determination due to noise. However, with such a touch panel control device, it is not possible to distinguish between different types of touch operation habits, so that a touch operation that is not evaluated as a legitimate touch operation is performed with a valid touch 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, a complaint may occur that the touch operation is not 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 the habits of the touch operation of the operator and avoids the problem that the touch operation is not accepted many times.

A 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 a capacitance-type touch panel, and an evaluation result for the detection signal using a touch threshold. A touch evaluation unit that outputs a touch confirmation signal indicating that a touch operation has been performed based on the detection unit, an estimation unit that estimates whether the detection signal is based on a valid touch operation or an invalid touch operation, If the touch confirmation signal is not output despite being evaluated as a touch operation, the touch threshold for adjusting the touch threshold to a value at which the touch confirmation signal is output in response to the detection signal. With a value setting unit,
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, Evaluate the detection signal individually using the signal height threshold and the signal width threshold,
When the touch operation corresponding to the detection signal that has output the touch confirmation signal is canceled within a predetermined time, the estimating unit estimates that the detection signal is based on an improper touch operation, and A touch threshold value setting unit adjusts the touch threshold value to an insensitive side by lowering the signal height threshold value and narrowing the signal width threshold value .

According to this configuration, even if it is estimated that the detection signal is a legitimate touch operation, a touch confirmation signal indicating that the touch operation has been performed by the evaluation using the threshold is not output. In this case, the touch threshold value is adjusted to a level (value) at which a touch determination signal is output by the detection signal. Thus, even when the touch operation (capacitance change behavior) is such that a detection signal in which the touch determination signal is not output is generated, the touch operation is performed after the touch threshold adjustment control is performed. Since the confirmation signal is output, the coordinate position of the touch operation is calculated, and execution processing of the command assigned to the coordinate position is performed. The touch confirmation signal as a result of evaluation using the touch threshold value, for example, because the touch panel cannot be pressed too hard despite the touch operation with the intention of the touch operation or 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. Thus, it is possible to prevent the touch panel from reacting even though the touch operation is repeatedly performed many times.
If the user does not perform a touch operation with the intention of performing a touch operation on a specific touch panel position (the position of the touch switch), but the touch confirmation signal is output, the user immediately presses the cancel button. Through such operations, the touch operation is canceled. Therefore, it can be estimated that such a touch operation is improper. From this, when the touch operation corresponding to the detection signal that caused the output of the touch determination signal is canceled within a predetermined time, the estimation unit estimates that the detection signal is based on an invalid touch operation. , The touch threshold can be adjusted. It is highly probable that an unintended touch operation has been evaluated due to a touch threshold value that has been adjusted too sensitively. The threshold is adjusted to the insensitive side.
In a detection signal generated by a change in capacitance due to a touch operation, a signal height and a signal width differ depending on a manner of a user's touch operation. Therefore, 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 characteristics (habits, etc.) of the user's touch operation 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.

  For example, the fact that the user is performing a touch operation with the intention of performing a touch operation on a specific touch panel position (the position of a touch switch) instead of performing an erroneous operation twice or more consecutively is the same. It can be estimated by the generation of the detection signal (the change behavior of the capacitance occurs on 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 by the touch signal generation unit, the estimation unit determines the detection signal. Can be estimated to be based on a valid touch operation. In such a situation, if the touch confirmation signal is not output, the touch threshold is adjusted to the sensitive side so that the touch confirmation signal is output.

  When a plurality of people operate the same touch panel, especially in a touch panel arranged at home, the possibility that the operating person includes a child, an adult, or an elderly person is high, and each touch operation is considerably different. In such a situation, when a certain person (child) operates, if the touch threshold value is adjusted, it will not be suitable for another person (elderly person), and the touch threshold value will be adjusted again. there is a possibility. In order to avoid this problem, it is necessary to set a touch threshold suitable for the operator. For this purpose, a user identification unit for identifying a user performing a touch operation is provided, and the touch threshold setting unit is configured to adjust the touch threshold for each user identified by the user identification unit. be able to.

  To identify a person who operates the touch panel and to set a touch threshold suitable for each person each time, when a large number of operations are performed, the processing load becomes excessive. 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 sequentially 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 operation value. In this configuration, instead of managing a touch threshold suitable for each person operating the touch panel, a detection signal is generated using a common touch threshold 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 operators and reduction of the processing load of the control device can be obtained in a well-balanced manner.

  A user identification unit for identifying a user performing a touch operation can be easily constructed by using a selection device such as a selection button or a selection switch, an ID reader, or the like, but requires a cost of adding a new device, Further, such a pre-operation before the touch operation is troublesome for the user. In order to reduce 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 signals recorded for each identified user. In this configuration, the feature of the individual touch operation itself is extracted from the detection signal by referring to the detection signal generated by the capacitance change behavior due to the touch operation, and the user is identified from the feature. .

  Similarly, the estimating unit that estimates whether the detection signal is based on a legitimate touch operation (touch operation intended by the user) or an improper touch operation (touch operation not intended by the user) also extracts a feature from the detection signal. From the extracted features, 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 improper touch operation. In particular, by analyzing a signal waveform pattern extracted from a plurality of detection signals generated continuously, it is estimated whether the touch operation has been performed by the user in a hurry or the touch operation performed by the infant without judgment. be able to.

Since the capacitance of a capacitive touch panel changes due to water droplets or the like, for example, when used in a remote control or the like placed in a bathroom or a kitchen, if the water or the like adheres to the touch panel surface, the touch panel becomes highly reliable. It may not respond. In particular, if the touch threshold is adjusted to the sensitive side, the problem becomes more serious. To suppress this problem, the is provided with a surface adhesion water sensing means to the capacitive touch panel, the touch threshold setting unit when the surface adhesive moisture detecting means detects the water of adhesion, the The configuration is such that the touch threshold is adjusted to the insensitive side by lowering the signal height threshold and narrowing the signal width threshold . With this configuration, if the possibility of water droplets adhering to the surface of the touch panel is increased when the surface adhering water detecting means detects the adhering water, the touch threshold is adjusted to the insensitive side in order to avoid malfunctions, so that the bathroom And so on, a highly reliable touch operation is realized.

FIG. 2 is a functional block diagram illustrating a basic configuration of a capacitive touch panel control device. FIG. 4 is a schematic diagram illustrating a relationship between a detection signal and a touch threshold. 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. 3 is a functional block diagram illustrating a configuration in which a user identification function is added to the basic configuration of the capacitive touch panel control device illustrated in FIG. 1. It is a functional block diagram showing one of concrete embodiments of a capacitive touch panel control device. 6 is a flowchart illustrating an example of touch operation control in the capacitive touch panel control device. 9 is a flowchart illustrating an example of a touch operation estimation process in the capacitive touch panel control device. 8 is a flowchart illustrating an example of a touch operation estimation process for requesting a touch threshold adjustment in the capacitive touch panel control device.

  FIG. 1 is a functional block diagram illustrating a basic configuration of a capacitive touch panel control device according to the present invention. The 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 capacitance-type touch panel (hereinafter simply referred to as a touch panel) 1. The position (coordinate position) where the touch operation is performed is determined by evaluating the detection signal obtained by converting the change behavior of the touch panel into an electric signal. The 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 value setting unit 4. The touch signal generation unit 2 generates a detection signal indicating a change behavior of the capacitance of the touch panel 1. Schematic examples of the detection signal are shown in FIG. 2, FIG. 3, and FIG. FIGS. 2, 3 and 4 show the detection signal and the touch threshold value which is a condition value for evaluating the detection signal. Here, the touch threshold value includes a signal height threshold value which is a condition value regarding the signal height of the detection signal, and a signal width threshold value which is a condition value regarding 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 value, 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 where the signal width in the detection signal is larger than the signal width threshold is larger than the signal height threshold, the signal is regarded as a signal due to a touch operation, and the touch determination signal is Output. The touch determination signal includes the coordinate position of the touched location on the touch panel 1.

  Although not necessary as a basic component of the control device, FIG. 1 shows a command determination unit 93. The command determination unit 93 refers to a table indicating a command assigned to a coordinate position (coordinate area) on the touch panel 1 to be touch-operated, and determines a command based on the touch determination 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 invalid touch operation. Here, the valid touch operation is a touch operation performed by the user with intention. 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 water droplets is different from a detection signal generated by a valid touch operation. Is not regarded as a touch operation performed by the user with intention, but as an improper touch operation.

  If the touch determination signal is not output as the evaluation result of the detection signal even though the estimating unit 5 estimates that the touch operation is valid, it can be determined that the touch threshold value is not appropriate. For this reason, the touch threshold value setting unit 4 causes such a detection signal to lead to the output of the touch determination signal when the touch determination signal is not output despite the fact that the touch operation is estimated to be a valid touch operation. The touch threshold is adjusted so as to obtain a good evaluation result.

For example, if a touch determination signal is not output even though a detection signal indicating a change in capacitance generated when the touch panel 1 is pressed with a finger is continuously generated, a touch threshold ( (Signal height threshold and signal width threshold) may be too severe. As shown in FIG. 3, in the first two touch operations, the condition has been reached for the signal width threshold, but the condition has not been reached for the signal height threshold. If it is determined that the signal height threshold is too high, the touch threshold setting unit 4 adjusts the signal height threshold to a low value. As a result, in the third touch operation, both the conditions of the signal height threshold and the signal width threshold are achieved, and the touch evaluation unit 3 outputs the touch determination signal. Also, as shown in FIG. 4, in the first two touch operations, the condition has been reached for the signal height threshold, but the condition has not been reached for the signal width threshold. as for the user it is determined to signal width threshold is too wide, the touch threshold value setting section 4, a signal width threshold is narrow rather adjustment. As a result, in the third touch operation, both the conditions of the signal height threshold and the signal width threshold are achieved, and the touch evaluation unit 3 outputs the touch determination signal.

  Although not shown in the figure, if both the signal height and the signal width of the detection signal have not reached the threshold condition at all, the interval between two consecutive detection signals that have not reached the threshold condition is shown. However, if the operation interval is extremely short or long as compared with the operation interval in a normal touch operation, the estimation unit 5 estimates that the touch operation is invalid. In this case, the adjustment of the touch threshold by the touch threshold setting unit 4 is not performed.

  In FIG. 1, the “cancel” command determined by the command determination unit 93 has been transferred to the estimation unit 5. The “cancel” command cancels a command determined through a preceding 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. When the command by the preceding touch operation is canceled by the “cancel” command within a predetermined time (for example, 1 to 2 seconds), the estimation unit 5 estimates that the preceding touch operation is an invalid touch operation. The improper touch operation in this case means that a detection signal is generated by a reaction of the touch panel 1 against a user's intention and the touch determination signal is output. Such an event often occurs due to the touch threshold being set to the sensitive side. Therefore, if such an event occurs at least once, preferably twice or more continuously in a short period, the touch threshold setting unit 4 adjusts the touch threshold to the insensitive side.

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

  Next, a basic configuration of a control device capable of identifying and controlling a plurality of users who operate the touch panel 1 will be described. A functional block diagram of this control device is shown in FIG. 5, in which a user identification unit 6 and a user identification device 60 are added as compared with the control device shown in FIG. Water detecting 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, the touch operation can be managed for each user. For example, the above-described touch threshold set by the touch threshold setting unit 4 can be changed for each user, and the adjustment of the touch threshold by the touch threshold setting unit 4 is also performed for each user. Can be. Alternatively, an adjustment value of the touch threshold value is calculated for each user, and the adjustment value is recorded in a memory area serving as an adjustment value recording unit. May be performed using the average calculation value obtained by the average calculation of the above. The average operation value includes an arithmetic average value, a moving average value, a weighted average value, an intermediate value, a mode value, and the like, and the arithmetic average value is usually used. Furthermore, the estimation of the touch operation by the estimating unit 5 can be made for each user, particularly for adults and children or for young people and old 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 the user identification device 60) selected by the user with hardware or software and have the user perform the button operation before the touch operation. Instead of the user identification button, the user can be identified by using an ID reader and an ID card as the user identification device 60. If the user performs an operation for user identification before the touch operation, the handling of the touch panel 1 becomes complicated, and it is not suitable for an operation touch panel of home appliances such as an air conditioner and a water heater. As a user identification method that does not impose a burden on the user, there is a method that utilizes a user's habit of touch operation. Since the user has a habit of touch operation, the change behavior of the capacitance based on the touch operation is also different. This difference in the change behavior affects the waveform of the detection signal. By registering, as a reference signal, a detection signal based on a typical touch operation of the whole family, the user can be identified by performing image recognition and pattern recognition on the generated detection signal.

  The surface adhering water detecting means 8 is a water detecting sensor which can be provided on the upper portion of the touch panel 1, and a sensor for detecting the presence of water based on a change in capacitance or the like is used. If the touch threshold 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 setting unit 4 sets the touch threshold 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 mounted on a lower layer of the touch panel 1, and various information is displayed on the liquid crystal panel 97 based on data from the application program 94 by an image signal generated by the image generation unit 95. The cooperation between the liquid crystal panel 97 and the touch panel 1 allows the user to give various commands to the hot water supply system. Through a touch operation on the touch panel 1, the touch operation coordinate position calculated in the touch input processing 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.

  The functional units related to the capacitance-type touch panel control device are substantially the same as those shown in FIG.

Next, an example of a specific touch operation control in a specific embodiment of the capacitive touch panel control device will be described with reference to a 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 based on 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 it exceeds the signal height threshold (Yes branch in # 03) and exceeds the signal width threshold (Yes branch in # 04), the touch evaluation unit 3 outputs a touch decision signal (# 05). The command determination unit 93 acquires the coordinate position of the touch panel 1 on which the touch operation has been performed from the touch determination signal (# 06). When the command assigned to the acquired coordinate position is determined (# 07), processing based on this command is performed by the program being executed (# 08).

  When the detection signal is equal to or less than the signal height threshold (No branch at # 03) or equal to or less than the signal width threshold (No branch at # 04), the detection signal satisfies the current touch threshold condition. Even if not, it is checked whether the signal is of a level that satisfies the touch threshold condition by changing the touch threshold condition within a predetermined range, that is, whether the signal is subject to the following evaluation processing Is performed (# 11). A simple determination condition for this evaluation target is to set a second threshold value lower than the above-mentioned touch threshold value. If not, the process returns to step # 01 and waits for the next touch operation.

  When the signal is to be evaluated, the detection signal is recorded as an undetermined detection signal in the memory as the touch operation recording unit 7 (# 12). Further, the result of the touch operation estimation processing in the touch operation estimation processing being executed in parallel is taken in (# 13). As described above, the touch operation estimation process is a process of estimating whether the detection signal recorded in step # 12 is based on a valid touch operation or an improper touch operation. If the captured touch operation estimation processing result is valid (Yes branch in # 14), the fact that the touch evaluation unit 3 does not output the touch determination signal is regarded as having 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 (# 15). 16). Thereafter, the process returns to step # 01 and waits for the next touch operation. If the captured touch operation estimation processing result is invalid (No branch in # 14), the recorded detection signal is deleted, and the process returns to step # 01 to wait for the next touch operation.

  Next, an example of the touch operation estimation processing will be described with reference to the flowchart in FIG. In the touch operation estimation process, as described above, since the touch operation is continuously performed, the touch operation is regarded as the user touching the touch panel 1 with the intention of the operation, and such a touch operation is performed. This is a process of requesting adjustment of the touch threshold value so as to recognize

  First, a detection signal recorded successively as an undetermined detection signal (a detection signal not accompanied by the output of a touch determined signal) is read (# 20). From the history of the read undetermined detection signals, a check of the undetermined detection signals recorded within a predetermined short period of time (the time required for two or more touch operations), that is, the most recent continuous It is checked whether a detection signal for confirmation (for example, two unconfirmed detection signals) is recorded (# 21). If the undetermined detection signal is recorded immediately and continuously (Yes branch in # 21), it means that the user has intentionally performed the touch operation twice and the touch operation is estimated to be valid. You. 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 undetermined detection signal to be evaluated is the signal height (Yes branch in # 23), a signal height threshold adjustment request is issued (# 24). Further, it is checked whether the reason of the uncertain detection signal to be evaluated is the signal width (# 25). If the signal width is the signal width (Yes branch at # 25), the signal width threshold adjustment request is made. (# 26). The check in step # 25 is performed even if the check in step # 23 is a No branch. Such a touch operation estimation process is performed every time an undetermined detection signal is recorded in the touch operation recording unit 7. The signal height threshold adjustment request and the signal width threshold adjustment request issued in the touch operation estimation processing are used in step # 13 of FIG.

  Next, an example of a touch operation estimation process for requesting a touch threshold adjustment will be described with reference to the flowchart in FIG. 9. As described above, when the touch operation corresponding to the detection signal that has output the touch determination signal is canceled within a predetermined time, the touch operation estimation process estimates that the detection signal is based on an improper touch operation. This is a process for requesting adjustment of the touch threshold. In other words, when the “cancel” command is determined by the command determination unit 93, whether to adjust the touch threshold is determined by estimating the touch operation.

  Since the touch operation estimation processing is triggered by the determination of the “cancel” command by the command determination unit 93 as a trigger, the command determination unit 93 first 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 in # 33), substantial processing is started. First, the command history recorded in the memory is read (# 34). The time interval between the command recorded immediately before (previous command) and the command recorded this time (“cancel” command) is calculated (# 35). It is checked whether the calculated time interval is shorter than a predetermined time set in advance (# 36). If the touch threshold is set on the sensitive side, the user may be evaluated as a touch operation by simply tracing the touch panel 1 lightly. In consideration of this, if the calculated time interval is less than the predetermined time (Yes branch in # 36), it is considered 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 value 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 that case, it is not necessary to adjust the touch threshold value to the insensitive side. Therefore, when the normal command and the “cancel” command are repeated a plurality of times in a short time, it is preferable to issue a request to adjust the touch threshold value to the insensitive side.

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

  Note that the configuration disclosed in the above embodiment (including another embodiment, the same applies hereinafter) can be applied in combination with the configuration disclosed in another embodiment unless there is a contradiction. The embodiment disclosed in the present specification is an exemplification, and the embodiment of the present invention is not limited thereto, and can be appropriately modified without departing from the object of the present invention.

  INDUSTRIAL APPLICABILITY The present invention is applicable to 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 detecting means 60: User identification device 93 : Command determination unit 94: Application program 95: Image generation unit 97: Liquid crystal panel

Claims (7)

A touch signal generation unit that generates a detection signal indicating a change behavior of the capacitance in the capacitance type 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 estimating unit that estimates whether the detection signal is based on a legitimate touch operation or an improper touch operation,
If the touch determination signal is not output despite being evaluated as a valid touch operation, the touch for adjusting the touch threshold to a value at which the touch determination signal is output in response to the detection signal A threshold setting unit,
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, Evaluate the detection signal individually using the signal height threshold and the signal width threshold,
When the touch operation corresponding to the detection signal that has output the touch confirmation signal is canceled within a predetermined time, the estimating unit estimates that the detection signal is based on an improper touch operation, and A capacitance-type touch panel control device that adjusts the touch threshold value to an insensitive side in a form in which a touch threshold value setting unit lowers the signal height threshold value and narrows the signal width threshold value .   When the touch signal generation unit does not output the touch confirmation signal even though the detection signal indicating the same change behavior is continuously generated in the touch signal generation unit, the estimation unit may determine that the detection signal is valid. The capacitance-type touch panel control device according to claim 1, wherein the control is based on a touch operation. The static identification device according to claim 1 , further comprising: a user identification unit that identifies a user who performs a touch operation, wherein the touch threshold setting unit adjusts the touch threshold for each user identified by the user identification unit. Capacitive touch panel control device. A user identification unit that identifies a user who performs a touch operation is provided, and the adjustment value of the touch threshold calculated by the touch threshold setting unit for adjusting the touch threshold is adjusted by the user identification unit. The touch threshold value setting unit is sequentially recorded in the adjustment value recording unit for each identified user, and the touch threshold value setting unit records the touch based on an average operation value of the adjustment values of all users recorded in the adjustment value recording unit. capacitive touch panel control device according to claim 1 or 2 to adjust the threshold. The capacitive touch panel control device according to claim 3 , wherein the user identification unit identifies a user performing a touch operation with reference to the detection signal recorded for each identified user . 6. The estimating unit according to claim 1, wherein the estimating unit estimates whether the change behavior is based on a legitimate touch operation or an improper touch operation with reference to a past detection signal of the identified user. 7. 4. The capacitive touch panel control device according to claim 1. The capacitance type touch panel is provided with a surface attached water detection unit, and when the surface attached water detection unit detects attached water, the touch threshold value setting unit sets the signal height threshold value. The capacitive touch panel control device according to any one of claims 1 to 6 , wherein the touch threshold value is adjusted to the insensitive side by lowering the signal width threshold value .

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