JP2012103995A - Touch panel device and detection sensitivity adjustment method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress states of misdetection and the like by properly setting detection sensitivity.SOLUTION: A detection determination part 33 detects an operation input to a touch panel 1 by a capacitance value detected by a capacitance value detection part 2 being included within detection range determined based on a predetermined sensitivity reference value, with a sensitivity correction value taken into account. And a timer/correction value setting part 32 controls detection sensitivity of the touch panel 1 by setting the sensitivity correction value based on transition of the capacitance value detected by the capacitance value detection part 2.

Description

  The present invention relates to a touch panel device and a detection sensitivity adjustment method thereof.

  2. Description of the Related Art Conventionally, a touch panel device that can perform an input operation according to information displayed on a display screen by pressing a touch panel superimposed on a display device, for example, is known. For example, Patent Document 1 discloses a touch panel device that can detect an input operation even with a thick glove or a finger without a glove. Specifically, this touch panel device changes the detection sensitivity from high sensitivity to low sensitivity, and changes the detection sensitivity from low sensitivity to high sensitivity when detection by the detection unit becomes non-detection. And a detection determination means will determine with detection, if the detection sensitivity is changed from low sensitivity to high sensitivity and the state detected again continues.

JP 2007-27034 A

  By the way, in this kind of touch panel device, as disclosed in Patent Document 1, it is important to suppress erroneous detection such as excessive detection and undetection, so that there is a difference in presence or absence of gloves and an operator. It is desirable that the detection sensitivity is appropriately set according to the operation mode.

  This invention is made | formed in view of this situation, The objective is to suppress the situation of a false detection by setting a detection sensitivity appropriately.

  In order to solve such a problem, the present invention detects a capacitance value corresponding to a change in capacitance in a touch panel, and statically falls within a detection range determined by taking a sensitivity correction value into consideration for a predetermined sensitivity reference value. The operation input to the touch panel is detected when the capacitance value is included, and the detection sensitivity of the touch panel is controlled by setting a sensitivity correction value based on the transition of the capacitance value.

  According to the present invention, since the sensitivity correction value is set according to the transition of the capacitance value, the detection range for performing the detection determination is appropriately set, thereby detecting according to the operation mode. Sensitivity can be set. Thereby, erroneous detection can be suppressed and an operation input can be accurately detected.

1 is a block diagram schematically showing a touch panel device according to a first embodiment. The flowchart which shows the detection operation of the touch panel 1 concerning 1st Embodiment. Explanatory diagram of detection sensitivity and capacitance value Graph showing changes in sensitivity correction value and capacitance value due to push operation with gloves on in the case where the previous sensitivity correction value was stored as a value corresponding to high sensitivity Graph showing changes in sensitivity correction value and capacitance value due to push operation with gloves on in the case where the previous sensitivity correction value was stored as a value corresponding to the standard sensitivity A graph showing the change in sensitivity correction and capacitance value associated with a push operation with bare hands in the case where the previous sensitivity correction value was stored as a value corresponding to high sensitivity Graph showing the transition of capacitance value with slide operation The block diagram which shows typically the touchscreen apparatus concerning 2nd Embodiment.

(First embodiment)
FIG. 1 is a block diagram schematically showing the touch panel device according to the first embodiment. This touch panel device is a device capable of performing an input operation in accordance with information displayed on a display. For example, the touch panel device is arranged in a superimposed manner on a display disposed on an instrument panel of a vehicle, for example, a vehicle device (for example, A device for operating a car navigation device, an air conditioner, and the like. The touch panel device mainly includes a touch panel 1, a capacitance value detection unit 2, and a control device 3. In the present embodiment, the touch position is detected by detecting a change in the capacitance value. It is a capacitance type device.

  The touch panel 1 is arranged in a stacked manner on a display such as a liquid crystal, and includes an operation surface that is pressed by a user's finger, a dedicated pen, or the like (hereinafter collectively referred to as “operation finger”). The touch panel 1 includes two-dimensionally arranged detection electrodes (not shown). With the detection electrodes, these conditions can be changed according to the approaching and pressing of the operation finger to the operation surface. It can be output as a change.

  The capacitance value detection unit 2 detects a change in capacitance output from the touch panel 1 as a capacitance value. Further, the capacitance value detection unit 2 associates the detected capacitance value with the detection position, and outputs this to the control device 3 as a detection result.

  The control device 3 has a function of controlling the touch panel device in an integrated manner. As the control device 3, a microcomputer mainly composed of a CPU, a ROM, a RAM, and an I / O interface can be used.

  Based on the detection result of the capacitance value detection unit 2, the control device 3 determines whether or not there is an effective operation input to the touch panel 1 as ON or OFF. And the control apparatus 3 outputs this judgment result with respect to the external controller 4 which controls the apparatus for vehicles according to application software. In relation to the present embodiment, the control device 3 has a function of automatically adjusting (correcting) the detection sensitivity of the touch panel 1 with respect to the operation finger.

  The control device 3 includes a correction value storage memory 31, a timer / correction value setting unit 32, a detection determination unit 33, and a detection result output unit 34 when this is functionally grasped.

  The correction value storage memory 31 stores a sensitivity correction value α for correcting the detection sensitivity. The sensitivity correction value α stored in the correction value storage memory 31 is read by the timer / correction value setting unit 32 or updated with a new value.

The timer / correction value setting unit 32 reads the sensitivity correction value α from the correction value storage memory 31 and outputs the sensitivity correction value α to the detection determination unit 33. The timer / correction value setting unit 32 monitors the capacitance value output from the capacitance value detection unit 2. The timer / correction value setting unit 32 determines whether or not the operation state is based on the change amount of the capacitance value based on the change of the capacitance value, and corrects the detection sensitivity according to the determination result. Specifically, the sensitivity correction value α is set.

  The timer / correction value setting unit 32 stores the set sensitivity correction value α in the correction value storage memory 31. The sensitivity correction value α stored in the correction value storage memory 31 functions as the sensitivity correction value α at the next operation.

  Further, the timer / correction value setting unit 32 determines whether or not the operating finger has moved more than a specific distance based on the output result from the detection result output unit 34 and the positional change of the detection position, that is, the slide. It is determined whether or not an operation is being performed. Based on this determination result, the timer / correction value setting unit 32 sets the correction value for slide operation as the sensitivity correction value α instead of the correction value for push operation.

  The detection determination unit 33 reflects the sensitivity correction value α output from the timer / correction value setting unit 32 in the determination threshold. Then, the detection determination unit 33 compares the capacitance value with a determination threshold while monitoring the capacitance value output from the capacitance value detection unit 2. Thereby, the detection determination unit 33 determines whether or not an electrostatic capacitance value equal to or greater than a determination threshold is detected, that is, whether or not an operation input to the touch panel 1 is detected, and the determination result is output as a detection result output unit 34. Output to.

  The detection result output unit 34 outputs the determination result from the detection determination unit 33 on / off. Specifically, the detection result output unit 34 turns on the detection result when it is determined that an operation input to the touch panel 1 is detected, and when it is determined that the operation input to the touch panel 1 is not detected. The detection result is turned off. The on / off state by the detection result output unit 34 is output to the external controller 4 and the timer / correction value setting unit 32.

  The external controller 4 executes a function according to the operation of the operating finger on the touch panel 1 based on the output information from the detection result output unit 34. When the detection result is turned on, the detection result output unit 34 described above can also output the detection position together with the detection result to the external controller.

  FIG. 2 is a flowchart showing the detection operation of the touch panel 1 according to the present embodiment. The process shown in this flowchart is executed by the control device 3.

  In step 1 (S1), the timer / correction value setting unit 32 determines whether or not the sensitivity correction value α is stored in the correction value storage memory. If a negative determination is made in step 1, that is, if the sensitivity correction value α is not stored, the process proceeds to step 2 (S2). On the other hand, if a positive determination is made in step 1, that is, if the sensitivity correction value α is stored, the process proceeds to step 3 (S3).

  In step 2, the timer / correction value setting unit 32 sets a preset initial value as the sensitivity correction value α. In contrast, in step 3, the timer / correction value setting unit 32 sets the value stored in the correction value storage memory 31 (the sensitivity correction value α calculated in the previous processing cycle) as the sensitivity correction value α. Set.

  In step 4 (S4), the timer / correction value setting unit 32 and the detection determination unit 33 start measuring the capacitance value.

In step 5 (S5), the timer / correction value setting unit 32 determines whether or not a capacitance value has been detected. In general, when an input operation on the touch panel 1 is performed, the capacitance value increases correspondingly. In this step 5, as shown in FIG.
It is determined whether or not the electrostatic capacitance value has reached the detectable range Cds (Cdth1 ≦ Cds ≦ Cdth4) set in the control device 3. If an affirmative determination is made in step 5, that is, if the capacitance value has reached the detectable range Cds, the process proceeds to step 6 (S6). On the other hand, if a negative determination is made in step 5, that is, if the capacitance value has not reached the detectable range Cds, the process returns to step 4.

  In step 6, the timer / correction value setting unit 32 determines whether or not the increase amount Cetup of the capacitance value is equal to or less than the specified value Ceth1. Here, the increase amount Cetup of the capacitance value is an increase amount of the capacitance value after a predetermined time (initial detection period) has elapsed from the timing at which the capacitance value was detected in Step 5. In other words, the increase amount Cetup corresponds to an increase amount in the transition of the capacitance value over a predetermined period triggered by an initial change in the capacitance value accompanying the start of operation on the touch panel 1. In the case where the capacitance value changes drastically in a short time, the influence of noise or the like can be considered. Therefore, the determination in step 6 is provided in order to determine such a change. Accordingly, the presence or absence of the change characteristic of the capacitance value associated with the operation on the touch panel 1 is determined by the process of step 6.

  If a negative determination is made in step 6, if the increase amount Cetup of the capacitance value is larger than the specified value Ceth1, the process proceeds to step 7 (S7). On the other hand, if the determination in step 6 is affirmative, if the increase amount Cetup of the capacitance value is equal to or less than the specified value Ceth1, the process proceeds to step 8 (S8).

  In step 7, the timer / correction value setting unit 32 determines that the detected capacitance value is noise. And the process after step 4 is performed again.

  In step 8, the timer / correction value setting unit 32 determines whether or not the capacitance value is within the currently set detection sensitivity range.

  For example, when the user operates the touch panel 1 with gloves on or the force for pressing the touch panel 1 is weak, the increase in the capacitance value is smaller than that in the normal operation mode. There is a tendency. On the contrary, when the force of pressing down the touch panel 1 is strong, there is a tendency that the increase amount of the capacitance value is larger than that in the normal operation mode. In consideration of such an operation mode, the detection sensitivity can be varied, and on condition that the capacitance value is equal to or higher than a determination threshold set in accordance with each detection sensitivity. Detects operation input. This determination threshold is determined in consideration of the sensitivity correction value α with respect to the sensitivity reference value Sb. In FIG. 3, for example, three levels of high sensitivity, standard sensitivity, and low sensitivity are illustrated as detection sensitivity.

  The standard sensitivity enables detection of a capacitance value in a range that is equal to or higher than a reference capacitance value Cdth2 corresponding to the sensitivity reference value Sb and lower than an upper limit capacitance value Cdth4 that is an upper limit value of the detectable range Cds. Next, the high sensitivity is a range obtained by adding a sensitivity correction value (positive value) α to the sensitivity reference value Sb (in the example of the figure, the lower limit capacitance value Cdth1 which is the lower limit value of the detectable range Cds to the upper limit capacitance value Cdth4. Capacitance values in the range up to are detectable. On the other hand, the low sensitivity is a range obtained by subtracting the sensitivity correction value (negative value) α from the sensitivity reference value Sb (in the example shown in the figure, from the capacitance value Cdth3 larger than the reference capacitance value Cdth2 to the upper limit capacitance value Cdth4). The capacitance value in the range (1) can be detected. Here, in the figure, “+” indicates a capacitance value detected as an operation input, and “*” indicates a capacitance value not detected as an operation input. Note that the detection sensitivity is not limited to three levels, and the sensitivity correction value α may be set according to more subdivided multistage levels, or based on the peak value of the capacitance value. A sensitivity correction value α may be set.

In step 8, the detection determination unit 33 adds the sensitivity correction value α to the capacitance value and the sensitivity reference value Sb.
Is compared with a determination threshold value taking into account whether or not a capacitance value is included in the currently set detection sensitivity range. If a negative determination is made in step 8, that is, if the capacitance value is not included in the detection sensitivity range, the process proceeds to step 9 (S9). On the other hand, if an affirmative determination is made in step 8, that is, if the capacitance value is included in the set sensitivity range, the process proceeds to step 12 (S12).

  In step 9, the timer / correction value setting unit 32 observes the transition of the capacitance value and determines whether or not a certain time has passed in the detectable range Cds. If an affirmative determination is made in step 9, that is, if a certain time has elapsed in the detectable range Cds, the process proceeds to step 10 (S10). On the other hand, if a negative determination is made in step 9, that is, if a certain time has not elapsed in the detectable range Cds, the process proceeds to step 7 described above.

  In step 10, the timer / correction value setting unit 32 corrects the sensitivity correction value α. Specifically, when the sensitivity correction value α for low sensitivity is set as the current sensitivity correction value α, the sensitivity correction value α is changed to the sensitivity correction value α for standard sensitivity by this step 10. Is set. Alternatively, when the sensitivity correction value α for standard sensitivity is set as the current sensitivity correction value α, the sensitivity correction value α is set to the sensitivity correction value α for high sensitivity (for example, positive To a predetermined value).

  In step 11 (S 11), the timer / correction value setting unit 32 stores the sensitivity correction value α set in step 10 in the correction value storage memory 31. As a result, the sensitivity correction value α stored previously is updated with the value set this time.

  In step 12, the timer / correction value setting unit 32 determines whether or not to reduce the current detection sensitivity. For example, when the detection sensitivity is too high as compared with the user's operation mode, there is a possibility that an operation input not intended by the user is detected. Therefore, the timer / correction value setting unit 32 compares the user's operation mode, that is, the current capacitance value and the capacitance values Cdth1 to Cdth4. The timer / correction value setting unit 32 determines a decrease in the set sensitivity when the current capacitance value is larger than the capacitance values Cdth1 to Cdth4 that define a detection sensitivity lower than the current detection sensitivity. For example, when the current detection sensitivity is high, the timer / correction value setting unit 32 reduces the detection sensitivity when the current capacitance value is larger than the reference capacitance value Cdth2 that defines the standard sensitivity. It is like judging.

  If an affirmative determination is made in step 12, that is, if the detection sensitivity is reduced, the process proceeds to step 10. In this case, in step 10, unlike the above-described processing, a sensitivity correction value α corresponding to the detection sensitivity to be reduced is set. On the other hand, if a negative determination is made in step 12, that is, if the detection sensitivity is not lowered, the process proceeds to step 13 (S13).

  In step 13, the detection result output unit 34 turns on the detection result.

  In step 14 (S14), the timer / correction value setting unit 32 determines whether or not the detection position has moved. If a negative determination is made in step 14, that is, if the detection position has not moved, the process proceeds to step 15 (S15). On the other hand, if an affirmative determination is made in step 14, that is, if the detection position has moved, the process proceeds to step 16 (S16).

  In step 15, the timer / correction value setting unit 32 sets a correction value for the push operation.

  In step 16 (S16), the timer / correction value setting unit 32 determines whether or not the movement distance of the detection position is equal to or greater than a specific distance. This specific distance is a distance for determining whether or not the slide operation with the operating finger has been performed, and an optimum value is set in advance through experiments and simulations. If a negative determination is made in step 16, that is, if the movement distance of the detection position is not greater than the specific distance, the process proceeds to step 15. On the other hand, if an affirmative determination is made in step 16, that is, if the moving distance of the detection position is greater than or equal to the specific distance, the process proceeds to step 17 (S17).

  In step 17, the timer / correction value setting unit 32 sets a correction value for the slide operation.

  In step 18 (S18), the detection determination unit 33 determines whether or not the capacitance value decrease value Cetdown is equal to or greater than the second determination value Ceth2. If an affirmative determination is made in step 18, that is, if the capacitance value decrease value Cetdown is greater than or equal to the second determination value Ceth2, the process proceeds to step 19 (S19). On the other hand, if a negative determination is made in step 18, that is, if the decrease value Cetdown of the capacitance value is smaller than the second determination value Ceth2, the process returns to step 13.

  In step 19, the detection result output unit 34 turns off the detection result.

  FIG. 4 is a graph showing the transition of the capacitance value and the sensitivity correction value α due to the push operation in a state where the glove is worn in the case where the previous sensitivity correction value α is stored as a value corresponding to high sensitivity. It is. In the figure, “+” indicates the transition of the capacitance value. As shown in the figure, the increase in the capacitance value is small even when the operation with the glove is put on the touch panel 1. For this reason, the transition of the capacitance value reaches a peak at a position with high detection sensitivity, although it reaches from the outside of the detectable range Cds to the inside of the detectable range Cds. After a certain time (initial detection period) has elapsed since the detection of the capacitance value, the detection result is turned on to detect the operation state until the capacitance value is outside the detection range.

  FIG. 5 is a graph showing the transition of the capacitance value and the sensitivity correction value α due to the push operation in a state where the glove is worn in the case where the previous sensitivity correction value α is stored as a value corresponding to the standard sensitivity. It is. When the timer / correction value setting unit 32 detects the capacitance value during the initial detection period and determines that the peak is low, the timer / correction value setting unit 32 sets the sensitivity correction value α so as to increase the sensitivity, that is, the detection sensitivity. As a result of correcting the sensitivity correction value α, the detection result output unit 34 can detect the operation state by turning on the detection result.

  FIG. 6 is a graph showing the transition of the capacitance value and the sensitivity correction value α associated with the push operation in the case where the previous sensitivity correction value α was stored as a value corresponding to high sensitivity in the bare hand operation. It is. The timer / correction value setting unit 32 detects the capacitance value during the initial detection period, determines that the peak is high, and corrects the sensitivity correction value α so that the detection sensitivity becomes the standard sensitivity. Thereafter, when it is determined that the operation is completed and the finger is released, the detection result output unit 34 turns off the detection result.

  FIG. 7 is a graph showing the transition of the capacitance value accompanying the slide operation. In the initial detection period, the timer / correction value setting unit 32 determines that the peak value is low, corrects the sensitivity correction value αp so as to increase the detection sensitivity, performs a detection result, and turns on the detection result. To do. After that, it detects that the slide operation is being performed by detecting the fluctuation amount of the capacitance detection position and the detection sensitivity. Then, the sensitivity correction value αs of the slide operation is set, and the ON output of the detection result is continued until the set capacitance value is reached.

  As described above, in the touch panel device of the present embodiment, the control device 3 (detection determination unit 33) has the capacitance value detection unit 2 within a detection range determined in consideration of the sensitivity correction value α with respect to a predetermined sensitivity reference value. The operation input to the touch panel 1 is detected by including the capacitance value detected by (detection determination unit). The control device 3 (timer / correction value setting unit 32) detects the touch panel 1 by setting the sensitivity correction value α based on the transition of the capacitance value detected by the capacitance value detection unit 2. Control sensitivity (sensitivity control unit).

  According to this configuration, it is possible to set the detection sensitivity according to the operation mode by setting the sensitivity correction value α according to the transition of the capacitance value. Thereby, since misdetection can be suppressed, operation input can be detected correctly.

  In the present embodiment, the timer / correction value setting unit 32 sets the capacitance value in a predetermined period (initial detection period) triggered by an initial change in the capacitance value associated with the start of operation on the touch panel 1. A sensitivity correction value α is set based on the transition.

  According to such a configuration, since the sensitivity correction value α is set in a certain initial detection period, a situation in which time required for sensitivity adjustment varies is suppressed. Thereby, since the time dispersion | variation in the sensitivity adjustment by a difference in operation modes, such as the presence or absence of a glove, is reduced, the situation where a user feels uncomfortable can be suppressed.

  In the present embodiment, when the detection determination unit 33 determines the change characteristic of the capacitance value associated with the operation on the touch panel 1 based on the transition of the capacitance value detected by the capacitance value detection unit 2. In this case, detection of operation input to the touch panel 1 is determined.

  According to such a configuration, by determining the change characteristic of the capacitance value due to the approaching or pressing of the operating finger, a sudden change in the capacitance value due to noise or the capacitance value due to the proximity of an unintended human body It is possible to suppress a situation in which a change in the number is detected as an operation input.

  In the present embodiment, as shown in FIG. 7, when the timer / correction value setting unit 32 detects a slide operation from the amount of movement of the detection position detected by the capacitance value detection unit 2. Sets the correction value for slide operation as the sensitivity correction value α instead of the correction value for push operation.

  According to such a configuration, the detection sensitivity is corrected corresponding to the change in the capacitance value detected during the slide operation. Therefore, it is possible to detect a slide operation for moving a finger while operating without interruption.

(Second Embodiment)
FIG. 8 is a block diagram schematically showing the touch panel device according to the second embodiment. The touch panel device according to the second embodiment is different from that of the first embodiment in that sensitivity correction corresponding to the operator is performed. Hereinafter, the description of the same configuration as that of the first embodiment will be omitted, and the description will focus on the differences.

  The touch panel device of this embodiment further includes a vehicle information input unit 5. The vehicle information input unit 5 inputs vehicle information such as smart key, seat position, weight, and mobile phone to the control device 3.

The control device 3 further includes an occupant determination unit 35 and an occupant characteristic determination unit 36, and these elements function as an operator specifying unit that specifies an operator who operates the touch panel. The occupant determination unit 35 determines an occupant who is an operator of the touch panel 1 based on the vehicle information from the vehicle information input unit 5. The occupant characteristic determination unit 36 determines occupant operation characteristics (for example, characteristics such as whether the operation is from the driver's seat side or the passenger's seat side). Further, the timer / correction value setting unit 32 sets the sensitivity correction value α according to the specified operator. The determined occupant information and the operation characteristic information of the occupant are stored in the correction value storage memory 31 in association with the set sensitivity correction value α. Thus, in the present embodiment, the timer / correction value setting unit 32 sets the sensitivity correction value α corresponding to the operator by referring to the correction value storage memory 31.

  According to this configuration, by specifying the occupant who is the operator, the difference between adults and children (the size of the hand to be operated), the operation method (nail operation, thumb operation, index finger operation, operation with pressure) , The operation can be identified as a light trace. As a result, the sensitivity correction value α can be set in accordance with the difference in the operator's characteristics (capacitance value), so that detection with the optimum sensitivity for the operator is possible.

  The touch panel device and the detection sensitivity adjustment method according to the embodiment of the present invention have been described above, but the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. Needless to say.

DESCRIPTION OF SYMBOLS 1 Touch panel 2 Capacitance value detection part 3 Control apparatus 31 Correction value preservation | save memory 32 Timer / correction value setting part 33 Detection determination part 34 Detection result output part 35 Crew determination part 36 Crew characteristic determination part 4 External controller

Claims (6)

A capacitive touch panel;
A capacitance value detection unit that detects a capacitance value according to a change in capacitance in the touch panel;
An operation input to the touch panel is detected by comparing a determination threshold value determined in consideration of a sensitivity correction value with a predetermined sensitivity reference value and a capacitance value detected by the capacitance value detection unit. A detection determination unit;
A touch panel having a sensitivity control unit configured to control the detection sensitivity of the touch panel by setting the sensitivity correction value based on a transition of the capacitance value detected by the capacitance value detection unit. apparatus.   The sensitivity control unit sets the sensitivity correction value from a transition of the capacitance value over a predetermined period, triggered by an initial change in the capacitance value accompanying the start of operation on the touch panel. The touch panel device according to claim 1.   When the detection determination unit determines a change characteristic of the capacitance value associated with an operation on the touch panel based on a transition of the capacitance value detected by the capacitance value detection unit, The touch panel device according to claim 1, wherein detection determination of an operation input to the touch panel is performed.   When the sensitivity control unit detects a slide operation from the amount of movement of the detection position detected by the capacitance value detection unit, the correction value for the slide operation is used instead of the correction value for the push operation. 4. The touch panel device according to claim 1, wherein the touch panel device is set as the sensitivity correction value. An operator specifying unit for specifying an operator who operates the touch panel;
A storage unit for storing the sensitivity correction value;
The sensitivity control unit sets the sensitivity correction value according to the operator specified by the operator characteristic unit, and stores the operator and the emotion correction value in association with each other in the storage unit. The touch panel device according to claim 1, wherein the touch panel device is characterized in that Detecting a capacitance value according to a change in capacitance in a capacitance-type touch panel;
Controlling the detection sensitivity of the touch panel by setting a sensitivity correction value based on the transition of the detected capacitance value;
Detecting an operation input to the touch panel by comparing a determination threshold value determined in consideration of the sensitivity correction value with a predetermined sensitivity reference value and the detected capacitance value;
A method for adjusting the detection sensitivity of a touch panel device, comprising:

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