JP6604454B1 - Information processing device, touch panel device, and program - Google Patents

Abstract

An information processing device, a touch panel device, and a program capable of suppressing erroneous determination of a touch operation are provided. In a touch panel device, a touch panel controller of an information processing device includes an acquisition unit that acquires a detection value from a touch panel provided in a display area of a display device for coordinates in the display area, and a detection value and a reference value. A processing unit that adjusts the touch threshold or adjusts the reference value to equalize the difference according to whether the continuous time when the difference is outside the predetermined range exceeds the time threshold or the frequency at which the difference is outside the predetermined range exceeds the frequency threshold And a determination unit that determines whether or not a touch operation is performed on the coordinates of the detected value according to whether or not the difference between the detected value and the reference value exceeds the adjusted touch threshold value. [Selection] Figure 3

Description

  The present invention relates to an information processing device, a touch panel device, and a program.

  In an information processing apparatus that acquires a detection value (for example, a capacitance value when the touch panel device is a capacitive type) from a touch panel provided in the display area of the display device for a plurality of coordinates in the display area, the current detection value Depending on whether or not a difference from a reference value determined based on a detection value at the time of initial setting exceeds a touch threshold value, the presence or absence of a touch operation on the coordinates of the current detection value may be determined.

JP 2011-76484 A

  However, in the information processing apparatus, there is a possibility that the touch operation is erroneously determined, for example, it is determined that the touch operation is performed on the coordinates where the touch operation is not performed.

  The disclosed technology has been made in view of the above, and an object thereof is to provide an information processing device, a touch panel device, and a program that can suppress erroneous determination of a touch operation.

In one aspect, the information processing apparatus disclosed in the present application is obtained by dividing an acquisition unit that acquires detection values for coordinates in the display area from a touch panel provided in the display area of the display device, and a surface of the touch panel. A storage unit that stores touch threshold setting information in which a partial area and a touch threshold are associated with each other for a plurality of partial areas including a plurality of coordinates, and a continuous time in which a difference between the detected value and the reference value is out of a predetermined range The touch threshold corresponding to the partial region including the coordinates of the detection value in the touch threshold setting information is changed in response to exceeding the time threshold or the frequency at which the difference is outside the predetermined range exceeds the frequency threshold. a processing unit for the difference between the detected value and the reference value depending on whether exceeds the changed touch threshold, data relative to the coordinate of the detection value And a determination unit for determining whether the switch operation.

The touch panel device disclosed in the application, in one embodiment, a display device, a touch panel provided on a display area of the display device, an acquisition unit of the detection value from the touch panel acquires the coordinates of the display area, wherein A storage unit that stores touch threshold setting information in which a partial area and a touch threshold are associated with each other for a plurality of partial areas each of which includes a plurality of coordinates, and the difference between the detection value and the reference value A portion including the coordinates of the detection value in the touch threshold setting information in response to the continuous time exceeding the predetermined range exceeding a time threshold or the frequency of the difference exceeding the predetermined range exceeding the frequency threshold a processing unit for changing the touch threshold value corresponding to the region, or the difference between the reference value and the detected value exceeds the changed touch threshold Depending on whether, and a determination unit for determining whether or not a touch operation relative to the coordinate of the detected value.

In one aspect, the program disclosed in the present application includes an acquisition step of acquiring detection values for coordinates in the display area from a touch panel provided in the display area of the display device, and a plurality of each of which is divided in the surface of the touch panel. A storage step of storing touch threshold setting information in which a partial area and a touch threshold are associated with each other for a plurality of partial areas including the coordinates, and a continuous time when a difference between the detection value and the reference value is out of a predetermined range Or changing the touch threshold corresponding to the partial area including the coordinates of the detection value in the touch threshold setting information in response to the frequency that the difference deviates from the predetermined range exceeds the frequency threshold. a step, a difference between the detected value and the reference value depending on whether exceeds the changed touch threshold, the detection value To execute a determining step of determining whether the touch operation to the computer with respect to the coordinate.

  According to one aspect of the information processing apparatus disclosed in the present application, erroneous determination of a touch operation can be suppressed.

FIG. 1 is a diagram illustrating a configuration of a touch panel device including an information processing apparatus according to an embodiment. FIG. 2 is a diagram illustrating a configuration of the touch panel in the embodiment. FIG. 3 is a diagram illustrating a configuration of the touch panel controller according to the embodiment. FIG. 4 is a diagram illustrating a difference between the detection value of the non-touch state and the reference value in the embodiment. FIG. 5 is a flowchart illustrating the operation of the touch panel device according to the embodiment. FIG. 6 is a diagram illustrating a data structure of touch threshold setting information at the time of initial setting in the embodiment. FIG. 7 is a flowchart illustrating touch threshold adjustment processing according to the embodiment. FIG. 8 is a diagram illustrating adjustment of the touch threshold in the embodiment. FIG. 9 is a diagram illustrating a data structure of touch threshold setting information after adjustment in the embodiment. FIG. 10 is a diagram illustrating adjustment of the touch threshold in the first modification example of the embodiment. FIG. 11 is a flowchart illustrating touch threshold adjustment processing according to the second modification of the embodiment. FIG. 12 is a flowchart illustrating touch threshold adjustment processing according to the third modification of the embodiment. FIG. 13 is a diagram illustrating leveling of the difference between the detection value and the reference value in the third modification example of the embodiment. FIG. 14 is a diagram illustrating leveling of the difference between the detection value and the reference value in the third modification example of the embodiment. FIG. 15 is a diagram illustrating leveling of the difference between the detection value and the reference value in the fourth modification example of the embodiment. FIG. 16 is a flowchart illustrating touch threshold adjustment processing according to the fifth modification of the embodiment. FIG. 17 is a diagram illustrating leveling of a difference between a detection value and a reference value and adjustment of a touch threshold in the fifth modification example of the embodiment. FIG. 18 is a flowchart illustrating touch threshold adjustment processing according to the sixth modification of the embodiment.

  Hereinafter, embodiments of a touch panel device disclosed in the present application will be described in detail with reference to the drawings. The disclosed technology is not limited by this embodiment. Moreover, the same code | symbol is attached | subjected to the structure which has the same function in embodiment, and the overlapping description is abbreviate | omitted.

(Embodiment)
The touch panel device according to the embodiment is, for example, a terminal such as a smartphone, a tablet device, or a personal computer. In the touch panel device, in order to improve operability, it may be required to provide a touch panel in a display area of a display device (for example, an LCD (Liquid Crystal Display)). That is, the touch panel is superimposed on the display unit of the display device via a predetermined gap. The surface of the touch panel serves as both a display area for displaying an image from the display unit and a touch area for operation.

  In the touch panel device, when a capacitive touch panel is used, it is possible to realize excellent touch detection sensitivity as compared with the case where another type (for example, a resistive film type) touch panel is used. High sensitivity and nimble operability can be realized, for example, a light touch on the touch area can be detected as a touch operation. On the other hand, the touch operation may be erroneously determined, for example, it is determined that there is a touch operation on the coordinates where the touch operation is not performed.

  For example, a touch panel device may be required to be thin and light in order to improve portability. As the touch panel device becomes thinner and lighter, there are more situations where the touch panel device is carried and used. For this reason, the situation which the force (for example, the force which distorts) which deform | transforms a touch panel device increases, and the load to a touch panel may increase by the reduction in the intensity | strength of a housing | casing by weight reduction.

  The touch panel device may be provided with an information processing device that acquires a capacitance value for a plurality of coordinates in the display area from a capacitive touch panel. In this information processing apparatus, it is determined that there is a touch operation because the difference between the reference value determined based on the detection value at the initial setting in the non-touch state and the current detection value exceeds the touch threshold. At this time, if the gap between the touch panel and the display device changes with time due to the deformation of the housing and varies in the plane, the current detection value in the non-touch state is initially set depending on the coordinates in the plane. The difference between the current detection value in the non-touch state and the reference value at the initial setting may exceed the touch threshold due to deviation from the reference value at the time. That is, in the information processing apparatus, there is a possibility that the touch operation is erroneously determined, for example, it is determined that there is a touch operation with respect to coordinates where the touch operation is not performed.

  Therefore, in this embodiment, in the information processing apparatus, the touch threshold is adjusted on the assumption that an environmental change such as deformation has occurred when the difference between the detected value and the reference value is continuously outside the predetermined range including the original reference value. In this way, the erroneous determination of the touch operation is suppressed.

  Specifically, the difference between the detected value due to environmental changes such as deformation and the reference value at the initial setting (for example, the difference between the current capacitance value and the initial capacitance value) is the difference between the detected value by the touch operation and the reference value. Compared to the difference from the value, the value tends to be maintained more continuously. For this reason, when the difference between the detected value and the reference value exceeds the time threshold for a continuous time that exceeds the predetermined range, it is not due to the touch operation that the difference is out of the predetermined range. It can be determined that this is due to the impact. That is, it is possible to determine the occurrence of the influence of environmental changes such as deformation in a form distinguished from the touch operation, and to adjust the touch threshold value accordingly. For example, if the display area is divided into a plurality of partial areas and this adjustment is performed for each partial area, the touch operation can be performed while suppressing a reduction in the sensitivity of the touch panel as compared with the case where the touch threshold is adjusted for the entire display area. It is possible to effectively suppress erroneous determination.

  More specifically, the touch panel device 1 including the information processing device 4 can be configured as shown in FIG. FIG. 1 is a diagram illustrating a configuration of a touch panel device 1 including an information processing device 4.

  As illustrated in FIG. 1, the touch panel device 1 includes a touch panel 2 and an information processing device 4. The information processing apparatus 4 includes a touch panel controller 41 and a control unit 42.

  The touch panel device 1 may be a device provided with a touch panel, and is, for example, a terminal such as a smartphone, a tablet device, or a personal computer.

  The control unit 42 includes a CPU (Central Processing Unit) 421, a RAM (Random Access Memory) 422, and a ROM (Read only memory) 423. The control unit 42 comprehensively controls each unit of the touch panel device 1.

  The ROM 423 stores a program for controlling the touch panel 2. The CPU 421 reads out the program stored in the ROM 423 and uses the RAM 422 as a work area, so that various functions can be realized.

  The display device 3 includes a display unit 3a. The display device 3 displays various information on the surface 2a of the touch panel 2 from the display unit 3a according to the control from the control unit 42.

  The touch panel 2 is a sheet-like position input device provided in the display area of the display device 3. When the direction perpendicular to the surface 2a is the Z direction, and the two directions perpendicular to each other in the plane perpendicular to the Z direction are the X direction and the Y direction (see, for example, FIG. 2), the touch panel 2 is a display unit of the display device 3. 3a is overlapped in the Z direction via a predetermined gap. The surface 2a of the touch panel 2 serves as both a display area where an image from the display unit 3a is displayed and a touch area for operation. The touch panel 2 is a so-called capacitance type position detection device that detects a change in capacitance caused by being pressed by a user. In this embodiment, the case where the capacitive touch panel 2 is used is exemplified, but another type of touch panel 2 may be used.

  On the surface 2a of the touch panel 2, for example, as shown in FIG. 2, a plurality of electrodes (for example, a plurality of transparent electrodes) for detecting a touch operation are two-dimensionally arranged, and a plurality of coordinates are arranged on the plurality of electrodes. (X1, Y1) to (X9, Y6) may be assigned. FIG. 2 is a diagram illustrating a configuration of the touch panel 2. FIG. 2 illustrates a case where 9 × 6 electrodes are arranged on the surface 2a of the touch panel 2 and 9 × 6 coordinates are assigned to these electrodes.

  Surface 2a of touch panel 2 can be divided into a plurality of partial regions RG11, RG12, RG13, RG21, RG22, and RG23 each including a plurality of coordinates.

  Partial region RG11 includes a plurality of coordinates (X1, Y1) to (X3, Y1), (X1, Y2) to (X3, Y2), (X1, Y3) to (X3, Y3). Partial region RG12 includes a plurality of coordinates (X4, Y1) to (X6, Y1), (X4, Y2) to (X6, Y2), (X4, Y3) to (X6, Y3). The partial region RG13 includes a plurality of coordinates (X7, Y1) to (X9, Y1), (X7, Y2) to (X9, Y2), (X7, Y3) to (X9, Y3). Partial region RG21 includes a plurality of coordinates (X1, Y4) to (X3, Y4), (X1, Y5) to (X3, Y5), (X1, Y6) to (X3, Y6). Partial region RG22 includes a plurality of coordinates (X4, Y4) to (X6, Y4), (X4, Y5) to (X6, Y5), (X4, Y6) to (X6, Y6). The partial region RG23 includes a plurality of coordinates (X7, Y4) to (X9, Y4), (X7, Y5) to (X9, Y5), (X7, Y6) to (X9, Y6).

  In the touch panel device 1, a touch threshold for detecting a touch operation can be set for each of the partial regions RG 11 to RG 23, and touch threshold setting information 422 a is generated in advance and stored in the RAM 422 of the control unit 42. . In the touch threshold setting information 422a, information for identifying a partial area and the touch threshold are associated with each other for a plurality of partial areas.

  Further, the surface 2a of the touch panel 2 may have non-detection regions ND1 and ND2 at both ends in the longitudinal direction (for example, the X direction in the case of FIG. 2). The non-detection areas ND1 and ND2 are not provided with electrodes and are not assigned coordinates. Both ends in the longitudinal direction of the surface 2a may be significantly affected by the deformation of the casing. Therefore, by providing the non-detection regions ND1 and ND2 at both ends in the longitudinal direction of the surface 2a, erroneous determination of the touch operation can be effectively suppressed.

  The touch panel 2 outputs a signal indicating the capacitance for each coordinate (X1, Y1) to (X9, Y6) to the touch panel controller 41 as a detection value.

  The touch panel controller 41 outputs coordinate data indicating coordinates pressed by the user to the control unit 42 based on the detection value input from the touch panel 2. Thereby, the control part 42 can implement | achieve control according to operation input from the user.

  The touch panel controller 41 has at least a CPU, a ROM, and a RAM. Various software programs and data for the programs are written in the ROM. The CPU implements various functions by reading a software program stored in the ROM. The RAM is used as a working memory.

  Next, various software configurations implemented in the touch panel controller 41 will be described with reference to FIG. FIG. 3 is a diagram showing a software configuration realized by the touch panel controller 41. As illustrated in FIG. 3, the touch panel controller 41 includes an acquisition unit 411, a processing unit 412, and a determination unit 413.

  The acquisition unit 411 acquires detection values from the touch panel 2 for a plurality of coordinates (X1, Y1) to (X9, Y6) in the surface 2a. The acquisition unit 411 supplies each detection value to the processing unit 412 in a form associated with the coordinates. The acquisition unit 411 acquires a detection value in a non-touch state from the touch panel 2 at the time of initial setting, and supplies each detection value to the processing unit 412 in a form associated with the coordinates. The acquisition unit 411 acquires detection values from the touch panel 2 during subsequent detection, and supplies each detection value to the processing unit 412 in a form associated with the coordinates.

  The processing unit 412 holds the detection value acquired by the acquisition unit 411 for each coordinate (X1, Y1) to (X9, Y6) as a reference value at the time of initial setting. At the time of subsequent detection, the processing unit 412 receives the detection value acquired by the acquisition unit 411 for each coordinate (X1, Y1) to (X9, Y6). The processing unit 412 obtains a difference between the detected value and the reference value for each coordinate (X1, Y1) to (X9, Y6) by subtracting the reference value from the detected value. The processing unit 412 holds the difference between the detection value and the reference value in a form associated with the coordinates. The processing unit 412 supplies the difference to the determination unit 413 in a form associated with the coordinates.

  For example, the difference between the detection value obtained by the processing unit 412 using the detection value acquired from the touch panel 2 in a non-touch state in which no touch operation is performed and the reference value is ideally illustrated in FIG. become that way. FIG. 4A is a diagram illustrating a difference between a detection value in a non-touch state and a reference value in an ideal case. As shown in FIG. 4A, the difference between the detected value and the reference value is substantially zero at each coordinate (X1, Y1) to (X9, Y6).

  On the other hand, when the influence of environmental changes such as deformation occurs, the difference between the detection value obtained by the processing unit 412 using the detection value acquired from the touch panel 2 in the non-touch state and the reference value is as shown in FIG. It becomes like this. FIG. 4B is a diagram illustrating a difference between the detection value of the non-touch state and the reference value when an influence of an environmental change such as deformation occurs. As shown in FIG. 4B, the difference between the detected value and the reference value varies from substantially zero in each of the coordinates (X1, Y1) to (X9, Y6).

  If this tendency becomes stronger, depending on the in-plane coordinates, the current detection value in the non-touch state may deviate from the reference value determined based on the detection value at the initial setting. It is possible that the difference between the current detection value at and the reference value at the initial setting exceeds the touch threshold. That is, there is a possibility that the determination unit 413 erroneously determines the touch operation, for example, it is determined that there is a touch operation with respect to coordinates where the touch operation is not performed.

  On the other hand, the processing unit 412 adjusts the touch threshold according to the continuous time in which the difference between the detection value and the reference value is outside the predetermined range exceeds the time threshold. The processing unit 412 adjusts the touch threshold when the continuous time when the difference deviates from the predetermined range to the positive side exceeds the time threshold. The processing unit 412 does not adjust the touch threshold when the continuous time when the difference deviates from the predetermined range to the positive side is equal to or less than the time threshold. The processing unit 412 does not adjust the touch threshold when the continuous time when the difference deviates from the predetermined range to the negative side exceeds the time threshold. The processing unit 412 does not adjust the touch threshold when the continuous time when the difference deviates from the predetermined range to the negative side is equal to or less than the time threshold.

  The processing unit 412 adjusts the touch threshold for each of the partial regions RG11 to RG23. For example, the processing unit 412 may adjust the touch threshold when the difference between at least one coordinate included in the partial region exceeds the time threshold for a continuous time that deviates from a predetermined range to the positive side. Alternatively, the processing unit 412 may adjust the touch threshold when the continuous time in which the difference between the coordinates of more than half the number included in the partial region deviates from the predetermined range to the positive side exceeds the time threshold. Alternatively, the processing unit 412 may adjust the touch threshold when the continuous time in which the difference between all the coordinates included in the partial region deviates from the predetermined range to the positive side exceeds the time threshold.

  The processing unit 412 accesses the RAM 422 of the control unit 42 and updates the touch threshold setting information 422a with the adjusted touch threshold. Thereby, the determination unit 413 reads the adjusted touch threshold value from the RAM 422 in a form associated with the partial area. The determination unit 413 compares the difference received from the processing unit 412 with the touch threshold value of the partial area that includes the coordinates of the difference. That is, the determination unit 413 determines whether or not there is a touch operation on the coordinates of the detection value, depending on whether or not the difference exceeds the adjusted touch threshold. The determination unit 413 determines that there is a touch operation when the difference exceeds the adjusted touch threshold, and determines that there is no touch operation when the difference is equal to or less than the adjusted touch threshold.

  Next, the operation of the touch panel device 1 will be described with reference to FIG. FIG. 5 is a flowchart showing the operation of the touch panel device 1.

  In the touch panel device 1, the processing unit 412 performs initial setting at a predetermined timing such as when the power is turned on or when the power is restored from the standby state (S1). In the initial setting, the acquisition unit 411 acquires a detection value for each coordinate (X1, Y1) to (X9, Y6) on the surface 2a of the touch panel 2, and the processing unit 412 holds the detection value as a reference value. Note that the processing unit 412 may generate a reference value for each coordinate (X1, Y1) to (X9, Y6) as reference value information and store it in the RAM 422 of the control unit 42. In the reference value information, information for identifying coordinates and reference values are associated with each other for a plurality of coordinates.

  Further, in the initial setting, the processing unit 412 generates touch threshold setting information 422 a and stores it in the RAM 422 of the control unit 42. In the touch threshold setting information 422a, information for identifying a partial area and the touch threshold are associated with each other for a plurality of partial areas. The touch threshold setting information 422a has, for example, a data structure as shown in FIG. FIG. 6 is a diagram illustrating a data structure of the touch threshold setting information 422a at the time of initial setting.

  As shown in FIG. 6, the touch threshold setting information 422a includes an area identification information column 422a1 and a touch threshold column 422a2. In the area identification information column 422a1, information for identifying the partial area is recorded. In the touch threshold column 422a2, the touch threshold associated with the region identification information column 422a1 is recorded. By referring to the touch threshold setting information 422a, it can be understood that the touch threshold of the partial region RG11 is Dth11. Similarly, it can be understood that the touch threshold value of the partial region RG23 is Dth23. At the time of initial setting, the touch threshold values Dth11 to Dth23 may be different or may be aligned to a common value (for example, default value Dth).

  Returning to FIG. 5, the processing unit 412 determines whether or not it is the touch threshold adjustment timing (S2). The touch panel controller 41 may determine that the touch threshold adjustment timing is reached when a predetermined period has elapsed since power activation or power recovery, and the predetermined period after power activation or power recovery. If it has not elapsed, it may be determined that it is not the touch threshold adjustment timing.

  When it is the touch threshold adjustment timing (“Yes” in S2), the acquisition unit 411 and the processing unit 412 perform touch threshold adjustment processing (S3). In the touch threshold adjustment process, the acquisition unit 411 acquires detection values from the touch panel 2 for coordinates in the display area. The processing unit 412 adjusts the touch threshold according to the continuous time in which the difference between the detection value and the reference value is outside the predetermined range exceeds the time threshold. The touch threshold adjustment process will be described in detail later. When it is not the touch threshold adjustment timing (“No” in S2), the acquisition unit 411 and the processing unit 412 skip the touch threshold adjustment processing.

  The acquisition unit 411 acquires a detection value for each coordinate (X1, Y1) to (X9, Y6) on the surface 2a of the touch panel 2 (S4). The processing unit 412 selects a coordinate to be processed among a plurality of coordinates (X1, Y1) to (X9, Y6). The processing unit 412 calculates the difference between the detected value and the reference value for the coordinates to be processed (S5). The determination unit 413 reads the touch threshold setting information 422a from the RAM 422 of the control unit 42. The determination unit 413 refers to the touch threshold setting information 422a and identifies the touch threshold of the partial area including the difference coordinates. The determination unit 413 compares the difference calculated in S5 with the identified touch threshold, and determines whether the difference exceeds the touch threshold (S6).

  If the difference exceeds the touch threshold (“Yes” in S6), the determination unit 413 determines that the touch operation is “present” with respect to the coordinates to be processed (S7), and if the difference is less than the touch threshold ( If “No” in S6), it is determined that the touch operation is “no” for the coordinates to be processed (S8).

  The processing unit 412 determines whether or not the processing of S4 to S7 has been performed for all the coordinates of the plurality of coordinates (X1, Y1) to (X9, Y6) (S9). When the processing of S4 to S7 is not performed for all coordinates (“No” in S9), the processing unit 412 processes unprocessed coordinates among a plurality of coordinates (X1, Y1) to (X9, Y6). And the process returns to S4. When the processing unit 412 performs the processing of S4 to S7 for all coordinates (“Yes” in S9), the processing ends.

  Next, details of the touch threshold adjustment processing (S3) will be described with reference to FIG. FIG. 7 is a flowchart showing touch threshold adjustment processing (S3).

  In the touch panel device 1, the processing unit 412 sets a predetermined range (S10). This predetermined range is a range including the original reference value (here, substantially zero) and not including the touch threshold. When the value between the touch threshold and zero is + A, the predetermined range may be a range of −A to + A.

  The processing unit 412 may control the display device 3 via the control unit 42 so that a message prompting the user not to perform a touch operation on the touch panel 2 is displayed on the surface 2a.

  The processing unit 412 selects a partial area to be processed among the plurality of partial areas RG11 to RG23. The acquisition unit 411 acquires detection values from the touch panel 2 for each coordinate included in the partial area to be processed (S11). The processing unit 412 calculates a difference between the detected value and the reference value for the coordinates by subtracting the reference value from the detected value (S12). The processing unit 412 determines whether or not the difference deviates from a predetermined range (for example, −A to + A) to the positive side, that is, whether or not the difference exceeds an upper limit (for example, + A) of the predetermined range (S13). .

  For example, when the difference between the detected value and the reference value for X coordinate = X1 to X9 and Y coordinate = Y5 is as shown in FIG. 8A, the difference between the coordinates in the partial region RG21 is within a predetermined range. It is determined that it is below the upper limit. It is determined that the difference between the coordinates in the partial region RG22 exceeds the upper limit of the predetermined range. It is determined that the difference between the coordinates in the partial region RG23 is less than or equal to the upper limit of the predetermined range. FIG. 8 is a diagram illustrating adjustment of the touch threshold value.

  Returning to FIG. 7, when the difference falls within the predetermined range or deviates from the predetermined range to the negative side, that is, when the difference is not more than the upper limit of the predetermined range (“No” in S13), the processing unit 412 To S11.

  When the difference deviates from the predetermined range to the positive side, that is, when the difference exceeds the upper limit of the predetermined range (“Yes” in S13), the processing unit 412 measures the continuous time during which the difference deviates from the predetermined range to the positive side. The processing unit 412 compares the continuous time with a time threshold (for example, m seconds) while measuring the continuous time, and determines whether the continuous time exceeds the time threshold. m is an arbitrary positive number. The processing unit 412 returns the processing to S11 when the continuous time is completed within the time threshold or less (“No” in S14) such that the difference falls within a predetermined range.

  When the continuous time exceeds the time threshold (“Yes” in S14), the processing unit 412 determines that an influence of an environmental change such as deformation has occurred (S15), and adjusts the touch threshold (S16).

For example, when the difference between the detected value and the reference value for X coordinate = X1 to X9 and Y coordinate = Y5 is as shown in FIG. 8A, the processing unit 412 is as shown in FIG. 8B. Adjust the touch threshold. The processing unit 412 increases the touch threshold value from Dth22 to Dth22a for the partial region RG22. This process can be expressed by the following equation.
Dth22 + ΔDth22 = Dth22a
The increase amount ΔDth22 in this expression is arbitrary, but may be, for example, ΔDth22 = + A, or ΔDth22 = + A × K (for example, K is an arbitrary number greater than 1).

  Returning to FIG. 7, the processing unit 412 accesses the RAM 422 of the control unit 42 and updates the touch threshold setting information 422 a with the adjusted touch threshold.

  For example, when the touch threshold of the partial region RG12 is adjusted from Dth12 to Dth12a and the touch threshold of the partial region RG22 is adjusted from Dth22 to Dth22a, the touch threshold setting information 422a is as shown in FIG.

  Returning to FIG. 7, the processing unit 412 determines whether or not the processes of S11 to S16 have been performed on all the partial areas of the plurality of partial areas RG11 to RG23 (S17). When the processing of S11 to S16 is not performed for all the partial areas (“No” in S17), the processing unit 412 selects an unprocessed partial area as a partial area to be processed among the partial areas RG11 to RG23. Then, the process returns to S11. When the processing unit 412 performs the processing of S11 to S16 for all the partial areas (“Yes” in S17), the processing ends.

  As described above, in the present embodiment, in the information processing apparatus 4, it is assumed that an environmental change such as deformation has occurred when the difference between the detected value and the reference value is continuously outside the predetermined range including the original reference value. Adjust the threshold. For example, the information processing apparatus 4 adjusts (for example, increases) the touch threshold in response to the continuous time in which the difference between the detection value and the reference value exceeds a predetermined range exceeds the time threshold. Thereby, the erroneous determination of touch operation can be suppressed. Therefore, when the touch panel device 1 is thin and light, stable touch panel operation can be provided, and user satisfaction can be increased.

  In the present embodiment, in the information processing apparatus 4, the touch threshold is adjusted for each partial region of the surface 2 a of the touch panel 2. Thereby, compared with the case where a touch threshold value is adjusted about the whole surface 2a, the erroneous determination of touch operation can be suppressed effectively, suppressing the reduction of the sensitivity of the touch panel 2. FIG.

  In the present embodiment, in the information processing apparatus 4, when the continuous time in which the difference between the detected value and the reference value deviates from the predetermined range to the positive side exceeds the time threshold, the touch threshold is adjusted, and the detected value and the reference value are adjusted. The touch threshold value is not adjusted when the continuous time in which the difference between and exceeds the time threshold exceeds the predetermined range. Thereby, erroneous determination of the touch operation can be effectively suppressed while suppressing a decrease in sensitivity of the touch panel 2.

(First modification)
Note that the information processing apparatus 4 may adjust the touch threshold for each of the coordinates (X1, Y1) to (X9, Y6) of the surface 2a of the touch panel 2. For example, when the difference between the detected value and the reference value with respect to X coordinate = X1 to X9 and Y coordinate = Y5 is as shown in FIG. 10A, the processing unit 412 is as shown in FIG. The touch threshold value may be adjusted. FIG. 10 is a diagram illustrating adjustment of the touch threshold in the first modification example of the embodiment. The processing unit 412 increases the touch threshold from Dth22 to Dth223 for coordinates (X3, Y5) where the difference exceeds the upper limit (for example, + A) of the predetermined range. This process can be expressed by the following equation.
Dth22 + ΔDthX3 = Dth223
The processing unit 412 increases the touch threshold from Dth22 to Dth224 for coordinates (X4, Y5) where the difference exceeds the upper limit of the predetermined range. This process can be expressed by the following equation.
Dth22 + ΔDthX4 = Dth224
The processing unit 412 increases the touch threshold from Dth22 to Dth225 for coordinates (X5, Y5) where the difference exceeds the upper limit of the predetermined range. This process can be expressed by the following equation.
Dth22 + ΔDthX5 = Dth225
The processing unit 412 increases the touch threshold from Dth22 to Dth226 for coordinates (X6, Y5) where the difference exceeds the upper limit of the predetermined range. This process can be expressed by the following equation.
Dth22 + ΔDthX6 = Dth226
The processing unit 412 increases the touch threshold from Dth22 to Dth227 for coordinates (X7, Y5) where the difference exceeds the upper limit of the predetermined range. This process can be expressed by the following equation.
Dth22 + ΔDthX7 = Dth227
The amount of increase in these equations is arbitrary. For example, ΔDthX3 = “difference of coordinates (X3, Y5)” × K ′ (for example, K ′ is an arbitrary positive number less than 1), ΔDthX4 = “coordinate ( Difference between X4 and Y5) × K ′, ΔDthX5 = “difference between coordinates (X5, Y5)” × K ′, ΔDthX6 = “difference between coordinates (X6, Y5)” × K ′, ΔDthX7 = “coordinate (X7, Y5) difference “× K ′” may be used.

  As described above, in the information processing apparatus 4, the touch threshold is adjusted for each coordinate of the surface 2 a of the touch panel 2. Thereby, compared with the case where a touch threshold value is adjusted about the whole surface 2a, the erroneous determination of touch operation can be suppressed effectively, suppressing the reduction of the sensitivity of the touch panel 2. FIG.

(Second modification)
The information processing device 4 may adjust the touch threshold in response to the frequency that the difference between the detection value and the reference value is out of the predetermined range exceeds the frequency threshold. For example, as shown in FIG. 11, the touch panel controller 41 may perform touch threshold adjustment processing different from the embodiment in the following points. FIG. 11 is a flowchart showing the adjustment process in the second modification of the embodiment.

  When the partial area to be processed is selected, the processing unit 412 resets the count number to zero (S21) and starts measuring time with a timer. The count number may be realized by hardware by a counter circuit or the like, or may be realized by software as a software variable. The processing unit 412 refers to the timer and stands by until the count cycle elapses (“No” in S22), and when the count cycle elapses (“Yes” in S22), the processing of S11, S12, and S13 is sequentially performed. .

  When the difference between the detection value and the reference value deviates from the predetermined range to the positive side, that is, when the difference exceeds the upper limit of the predetermined range (“Yes” in S13), the processing unit 412 increments the count number (S23). . The processing unit 412 determines whether or not the count number exceeds a threshold (for example, N times) (S24). N is an arbitrary integer of 2 or more. When the count number is equal to or less than the threshold (“No” in S24), the processing unit 412 returns the process to S22. When the count number exceeds the threshold value (“Yes” in S24), the processing unit 412 determines that an influence of an environmental change such as deformation has occurred (S15), and adjusts the touch threshold value (S16).

  The processing unit 412 repeats the processing of S22 to S16 until a predetermined time elapses from the timing when the count number is reset (S21) (“No” in S25), and when the predetermined time elapses (“Yes” in S25), It is determined whether or not the processes of S11 to S16 have been performed on all the partial areas of the plurality of partial areas RG11 to RG23 (S17). When the processing of S11 to S16 is not performed for all the partial areas (“No” in S17), the processing unit 412 selects an unprocessed partial area as a partial area to be processed among the partial areas RG11 to RG23. Then, the process returns to S21. When the processing unit 412 performs the processing of S11 to S16 for all the partial areas (“Yes” in S17), the processing ends.

  As described above, in the information processing apparatus 4, an environmental change such as a deformation has also occurred by adjusting the touch threshold according to the frequency that the difference between the detected value and the reference value exceeds the frequency threshold. The touch threshold can be adjusted as follows.

(Third Modification)
The information processing device 4 may level the difference instead of adjusting the touch threshold when the difference between the detection value and the reference value is continuously out of the predetermined range. For example, as shown in FIG. 12, the touch panel controller 41 may perform touch threshold adjustment processing that differs from the embodiment in the following points. FIG. 12 is a flowchart illustrating touch threshold adjustment processing according to the third modification of the embodiment.

  After performing S12, the processing unit 412 determines whether or not the difference between the detected value and the reference value is out of the predetermined range (S31).

  When the difference is within the predetermined range (“No” in S31), the processing unit 412 returns the process to S11.

  When the difference is outside the predetermined range (“Yes” in S31), the processing unit 412 measures the continuous time when the difference is outside the predetermined range, and performs S14.

  When the continuous time exceeds the time threshold (“Yes” in S14), the processing unit 412 determines that an influence of an environmental change such as deformation has occurred (S15), and equalizes the difference (S32).

  For example, when the difference between the detected value and the reference value for X coordinate = X1 to X9 and Y coordinate = Y5 is as shown in FIG. 13A, the processing unit 412 is as shown in FIG. 13B. Level the difference. FIG. 13 is a diagram illustrating difference leveling in the third modification example of the embodiment, and illustrates difference leveling when the difference deviates from a predetermined range (for example, −A to + A) to the positive side. Yes. The processing unit 412 resets the current difference value as a reference value for each coordinate included in the partial region RG22. Thereby, the processing unit 412 obtains a difference leveled to substantially zero by subtracting the adjusted reference value from the detection value for each coordinate included in the partial region RG22.

  Alternatively, when the difference between the detected value and the reference value for X coordinate = X1 to X9 and Y coordinate = Y5 is as shown in FIG. 14A, the processing unit 412 is as shown in FIG. 14B. Implement leveling. FIG. 14 is a diagram illustrating difference leveling in the third modification example of the embodiment, and illustrates difference leveling when the difference deviates from a predetermined range to the negative side. The processing unit 412 resets the current difference value as a reference value for each coordinate included in the partial region RG22. Thereby, the processing unit 412 obtains a difference leveled to substantially zero by subtracting the adjusted reference value from the detection value for each coordinate included in the partial region RG22.

  Returning to FIG. 12, the processing unit 412 determines whether or not the processing of S11 to S32 has been performed for all the partial regions of the plurality of partial regions RG11 to RG23 (S17). When the processing of S11 to S32 is not performed on all partial areas (“No” in S17), the processing unit 412 selects an unprocessed partial area from among the partial areas RG11 to RG23 as a partial area to be processed. Then, the process returns to S11. When the processing of S11 to S32 is performed for all partial areas (“Yes” in S17), the processing unit 412 ends the processing.

  In this way, in the information processing apparatus 4, when the difference between the detected value and the reference value is continuously outside the predetermined range, the difference is leveled assuming that an environmental change such as deformation has occurred. For example, the information processing device 4 equalizes the difference in response to the continuous time that the difference is outside the predetermined range exceeds the time threshold. As a result, the information processing device 4 determines whether or not a touch operation has been performed on the coordinates of the detected value depending on whether or not the difference between the detected value and the adjusted reference value exceeds the touch threshold. Also by this, the erroneous determination of the touch operation can be suppressed.

  In the information processing apparatus 4, the difference between the detection value and the reference value is leveled for each partial region of the surface 2 a of the touch panel 2. Thereby, compared with the case where a difference is leveled about the whole surface 2a, the erroneous determination of touch operation can be suppressed effectively, suppressing the reduction of the sensitivity of the touch panel 2.

  Although not shown, in the information processing apparatus 4, the difference may be leveled in accordance with the frequency that the difference between the detected value and the reference value exceeds the predetermined range. This also makes it possible to equalize the difference assuming that an environmental change such as deformation has occurred.

(Fourth modification)
The information processing device 4 may level the difference between the detection value and the reference value for each coordinate (X1, Y1) to (X9, Y6) of the surface 2a of the touch panel 2. For example, when the difference between the detected value and the reference value for X coordinate = X1 to X9 and Y coordinate = Y5 is as shown in FIG. 15A, the processing unit 412 is as shown in FIG. 15B. The difference may be leveled. FIG. 15 is a diagram illustrating difference leveling in the fourth modification example of the embodiment. The processing unit 412 determines the current difference value for the coordinates (X3, Y5), (X4, Y5), (X5, Y5), (X6, Y5), (X7, Y5) where the difference exceeds the upper limit of the predetermined range. Is set as the reference value. As a result, the processing unit 412 sets the adjusted reference value from the detected value for each coordinate (X3, Y5), (X4, Y5), (X5, Y5), (X6, Y5), (X7, Y5). The difference leveled to approximately zero is obtained by subtraction or the like.

  As described above, in the information processing device 4, the difference between the detection value and the reference value is leveled for each coordinate of the surface 2 a of the touch panel 2. Thereby, compared with the case where a touch threshold value is adjusted about the whole surface 2a, the erroneous determination of touch operation can be suppressed effectively, suppressing the reduction of the sensitivity of the touch panel 2. FIG.

(Fifth modification)
Alternatively, the information processing device 4 may level the difference and adjust the touch threshold when the difference between the detection value and the reference value is continuously out of the predetermined range. For example, as illustrated in FIG. 16, the processing unit 412 may perform touch threshold adjustment processing that differs from the third modification in the following points. FIG. 16 is a flowchart illustrating touch threshold adjustment processing according to the fifth modification of the embodiment.

  After performing S32, the processing unit 412 determines whether or not the difference deviates from the predetermined range to the positive side, that is, whether or not the difference exceeds the upper limit (for example, + A) of the predetermined range (S41).

  When the difference falls within the predetermined range or falls outside the predetermined range, that is, when the difference is not more than the upper limit of the predetermined range (“No” in S41), the processing unit 412 returns the process to S11.

  When the difference deviates from the predetermined range to the positive side, that is, when the difference exceeds the upper limit of the predetermined range (“Yes” in S41), the processing unit 412 adjusts the touch threshold (S42).

For example, when the difference between the detected value and the reference value for X coordinate = X1 to X9 and Y coordinate = Y5 is as shown in FIG. 17A, the processing unit 412 is as shown in FIG. Level the difference and adjust the touch threshold. FIG. 17 is a diagram illustrating difference leveling and touch threshold adjustment in the fifth modification example of the embodiment. The processing unit 412 resets the current difference value as a reference value for each coordinate included in the partial region RG22. Thereby, the processing unit 412 obtains a difference leveled to substantially zero by subtracting the adjusted reference value from the detection value for each coordinate included in the partial region RG22. Furthermore, the processing unit 412 decreases the touch threshold for the partial region RG22 from Dth22 to Dth22b. This process can be expressed by the following equation.
Dth22−ΔDth22 = Dth22b
The reduction amount ΔDth22 in this equation is arbitrary, but may be, for example, ΔDth22 = + A × K (for example, K is an arbitrary number equal to or less than 1).

  As described above, in the information processing apparatus 4, when the difference between the detection value and the reference value is continuously out of the predetermined range, the difference is leveled and the touch threshold is adjusted assuming that an environmental change such as deformation has occurred. For example, the information processing device 4 leveles the difference in response to the continuous time exceeding the time threshold exceeding the predetermined range, and adjusts (for example, decreases) the touch threshold according to the leveled amount. . Thereby, erroneous determination of the touch operation can be suppressed while increasing the sensitivity of the touch panel 2.

(Sixth Modification)
Alternatively, the information processing device 4 may determine whether the difference between the detected value and the reference value exceeds the touch threshold during the adjustment process. For example, as illustrated in FIG. 18, the processing unit 412 may perform touch threshold adjustment processing that differs from the third modification in the following points. FIG. 18 is a flowchart illustrating the adjustment process in the sixth modification of the embodiment.

  After performing S31, the processing unit 412 reads the touch threshold setting information 422a from the RAM 422 of the control unit 42. The processing unit 412 refers to the touch threshold setting information 422a, and specifies the touch threshold of the partial region including the difference coordinates calculated in S12. The processing unit 412 compares the difference calculated in S12 with the identified touch threshold, and determines whether or not the difference exceeds the touch threshold (S51).

  If the difference exceeds the touch threshold (“Yes” in S51), the processing unit 412 should not perform adjustment because there is a touch operation on the partial area to be processed (that is, the difference leveling (S32) is performed). The process proceeds to S17.

  If the difference is equal to or smaller than the touch threshold (“No” in S51), the processing unit 412 should perform adjustment because there is no touch operation on the partial area to be processed (that is, the difference leveling (S32) is performed). The process proceeds to S14.

  As described above, in the information processing apparatus 4, the difference between the detection value and the reference value exceeds the touch threshold value, so that the difference is not leveled, so that it is clearly distinguished from the touch operation. Differences can be leveled in the form.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Touch panel apparatus 2 Touch panel 3 Display apparatus 4 Information processing apparatus 41 Touch panel controller 42 Control part 411 Acquisition part 412 Processing part 413 Determination part 421 CPU
422 RAM
423 ROM

Claims (9)

An acquisition unit that acquires detection values for coordinates in the display area from a touch panel provided in a display area of the display device;
A storage unit that stores touch threshold setting information in which a partial area and a touch threshold are associated with each other with respect to a plurality of partial areas each of which includes a plurality of coordinates and is divided into an integrated surface of the touch panel;
In the touch threshold setting information , the continuous time when the difference between the detection value and the reference value falls outside the predetermined range exceeds a time threshold, or the frequency at which the difference falls outside the predetermined range exceeds the frequency threshold . A processing unit for changing a touch threshold corresponding to a partial region including the coordinates of the detection value ;
A determination unit that determines whether or not there is a touch operation on the coordinates of the detection value, depending on whether or not a difference between the detection value and the reference value exceeds the changed touch threshold;
An information processing apparatus comprising: The processing unit is configured such that a continuous time in which a difference between the detection value and the reference value is outside a predetermined range exceeds a time threshold, or a frequency at which the difference is outside the predetermined range exceeds a frequency threshold, The difference is leveled, and the touch threshold corresponding to the partial area including the coordinates of the detection value in the touch threshold setting information is changed.
The information processing apparatus according to claim 1. The touch threshold is a positive value,
When the continuous time when the difference deviates from the predetermined range to the positive side exceeds the time threshold, or when the frequency when the difference deviates from the predetermined range to the positive side exceeds the frequency threshold, When the touch threshold is changed and the continuous time when the difference deviates from the predetermined range to the negative side exceeds the time threshold, or the frequency at which the difference deviates from the predetermined range to the negative side exceeds the frequency threshold case, the information processing apparatus according to claim 1 or 2 does not change the touch threshold. The information processing apparatus according to claim 2 , wherein the processing unit equalizes the difference for each partial region. When the difference does not exceed the touch threshold, the processing unit exceeds a time threshold when the difference is outside the predetermined range, or a frequency at which the difference is outside the predetermined range exceeds the frequency threshold. The information processing apparatus according to claim 2 , wherein the difference is leveled and the difference is not leveled when the difference exceeds the touch threshold. The information processing apparatus according to claim 2 , wherein the processing unit changes the touch threshold according to an amount obtained by leveling the difference. The touch threshold is a positive value,
When the difference deviates from the predetermined range to the positive side , the processing unit equalizes the difference and changes the touch threshold according to the leveled difference, and the difference exceeds the predetermined range . The information processing apparatus according to claim 6 , wherein when the deviation is negative, the difference is not leveled and the touch threshold is not changed . A display device;
A touch panel provided in a display area of the display device;
An acquisition unit that acquires detection values from the touch panel for coordinates in the display area;
A storage unit that stores touch threshold setting information in which a partial area and a touch threshold are associated with each other with respect to a plurality of partial areas each of which includes a plurality of coordinates and is divided into an integrated surface of the touch panel;
In the touch threshold setting information , the continuous time when the difference between the detection value and the reference value falls outside the predetermined range exceeds a time threshold, or the frequency at which the difference falls outside the predetermined range exceeds the frequency threshold . A processing unit for changing a touch threshold corresponding to a partial region including the coordinates of the detection value ;
A determination unit that determines whether or not there is a touch operation on the coordinates of the detection value, depending on whether or not a difference between the detection value and the reference value exceeds the changed touch threshold;
A touch panel device comprising: An acquisition step of acquiring detected values for coordinates in the display area from a touch panel provided in a display area of the display device;
A storage step of storing touch threshold setting information in which a partial area and a touch threshold are associated with each other for a plurality of partial areas each of which includes a plurality of coordinates and is divided within the surface of the touch panel integrated;
In the touch threshold setting information , the continuous time when the difference between the detection value and the reference value falls outside the predetermined range exceeds a time threshold, or the frequency at which the difference falls outside the predetermined range exceeds the frequency threshold . A processing step of changing a touch threshold value corresponding to a partial region including the coordinates of the detection value ;
A determination step of determining presence or absence of a touch operation on the coordinates of the detection value, depending on whether or not a difference between the detection value and the reference value exceeds the changed touch threshold;
A program that causes a computer to execute.

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