JP2008033762A - Display device with touch panel and navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a touch panel device for reporting necessity of calibration at an appropriate time, and a navigation system provided with the touch panel device. <P>SOLUTION: When a wide area display button 63 is pressed during a predetermined period after calibration of the touch panel device 18A, a pressing position 64 thereof is stored. After the lapse of the predetermined period, an average position of the pressing positions 64 or a reference average position is calculated from the stored pressing positions 64. Thereafter, every time when the wide area display button 63 is pressed, an average position of thirty latest pressing positions or a detection average position is calculated, and whether the detection average position is out of a predetermined range around the reference average position or not is determined. When it is out of the range, an alarm screen for urging execution of calibration of the touch panel device is displayed on a display monitor 16 when starting the navigation device 1A next. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device with a touch panel and a navigation device that include a touch panel that detects a position (touch position) where pressure is applied on a display screen.

A voltage value detected when pressure is applied to a plurality of indicators displayed on the resistive film, respectively, and based on the voltage value, a touched position on the display screen and a position where coordinates are detected on the touch panel There is known a touch panel control device that corrects a deviation from the above (for example, Patent Document 1).
Japanese Patent Laid-Open No. 9-44307

  The deviation between the touched position on the display screen and the position where the coordinates are detected on the touch panel occurs when the touch panel is attached to a liquid crystal panel or the like, and also due to aging of the touch panel control device. In the conventional touch panel control device, there is a problem that it is not known when to correct the deviation due to aging.

(1) The display device with a touch panel according to the first aspect of the invention is based on a touch panel that outputs a signal corresponding to the pressed position and a pressed position when a predetermined area set on the touch panel is pressed a plurality of times. And a control means for notifying the necessity of calibration for the detected output.
(2) According to the invention of claim 2, in the display device with a touch panel according to claim 1, the control means is calculated by a calculating means for calculating an average value (detected average value) of a plurality of pressing positions and a calculating means. And determining means for comparing the average value with a reference position of a predetermined area to determine the necessity of calibration.
(3) The invention of claim 3 is the display device with a touch panel according to claim 2, wherein the reference position is an average value (reference average value) of the pressed positions when the predetermined area is pressed a plurality of times after the calibration is completed. It is characterized by being.
(4) According to the invention of claim 4, in the display device with a touch panel according to claim 3, the determination means is for a predetermined period after the calibration is completed, or for each time the number of times the pressure is pressed after the calibration is completed becomes a predetermined value. In addition, the determination of whether or not calibration is necessary is started.
(5) According to the invention of claim 5, in the display device with a touch panel according to claim 3 or 4, the determination means needs to be calibrated when the difference between the reference average value and the detected average value is equal to or greater than a predetermined value. It is characterized by determining.
(6) A sixth aspect of the present invention is the display device with a touch panel according to any one of the first to fifth aspects, wherein when the control means notifies the necessity of the calibration, whether or not the calibration needs to be performed. And when the execution of the calibration is confirmed to be necessary, it is further provided with an execution means for executing the calibration.
(7) According to the invention of claim 7, in the display device with a touch panel according to claim 6, the execution means calibrates the output signal of the touch panel based on a difference between the reference average value and the detected average value. Features.
(8) The invention according to claim 8 is the display device with a touch panel according to claim 1, wherein the control means distributes each pressing position when the predetermined area is pressed a plurality of times after the calibration is completed, A calculating unit that calculates a variance of each pressing position when the predetermined area is pressed a plurality of times after being calculated, and a determining unit that determines the necessity of calibration based on both variances. To do.
(9) According to the ninth aspect of the present invention, in the display device with a touch panel according to the eighth aspect, the determination means performs the predetermined time after the calibration ends or the number of times pressed after the calibration ends reaches a predetermined value. In addition, the determination of whether or not calibration is necessary is started.
(10) In the display device with a touch panel according to claim 7, in the invention according to claim 10, the control unit presses a region having the highest number of presses a plurality of times among a plurality of predetermined regions set on the touch panel. Based on the pressed position of the touch panel, the necessity of calibration for the detection output of the touch panel is notified, and the execution means outputs the difference between the reference average value and the detection average value in the region where the number of times of pressing is the highest. It is characterized by calibrating based on the above.
(11) A navigation device according to an eleventh aspect of the present invention includes the display device with a touch panel according to any one of the first to tenth aspects.

  According to the present invention, the necessity of calibration of the touch panel is notified based on the pressing position when the predetermined area set on the touch panel is pressed a plurality of times. Therefore, it is possible to determine when the touch panel calibration should be performed without requiring a separate operation for determining whether or not the touch panel calibration is necessary.

-First embodiment-
FIG. 1 shows the configuration of the navigation device according to the first embodiment of the present invention. The navigation device 1A shown in FIG. 1 includes a touch panel device 18A on the display screen of the display monitor 16, and the navigation device 1A can be operated by pressing a button displayed on the display monitor 16. In addition to the touch panel device 18A, the navigation device 1A includes a control circuit 11, a ROM 12, a RAM 13, a current location detection device 14, an image memory 15, a display monitor 16, an input device 17, and a disk drive 19. The disk drive 19 is loaded with a DVD-ROM 110 that stores map data.

  The touch panel device 18 </ b> A is a device that detects a position where the transparent resistance film laminated on the surface of the display monitor 16 is pressed, and outputs the detected pressed position to the control circuit 11. The image displayed on the display monitor 16 is displayed through the resistive film. Details of the touch panel device 18A will be described later.

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various controls by executing a control program stored in the ROM 12 using the RAM 13 as a work area. When the control circuit 11 performs a predetermined route search process based on the map data stored in the DVD-ROM 110, the processing result is displayed on the display monitor 16 as a recommended route.

  The control circuit 11 determines the pressed button from the pressed position detected by the touch panel device 18 </ b> A and information on the touch area of the button displayed on the display monitor 16. Here, the touch area refers to a coordinate range on the touch panel assigned to the displayed button. When the pressed position is detected in the touch area, the process defined for the button related to the touch area is performed. For example, in the case of a button for displaying a map displayed on the display screen in a wide area, if the button is determined to be pressed, the map is displayed in a wide area. Further, the information on the pressed button is output to the touch panel device 18A as the pressed button information.

  The current location detection device 14 is a device that detects the current location of the vehicle. For example, a vibration gyro 14a that detects the traveling direction of the vehicle, a vehicle speed sensor 14b that detects the vehicle speed, and a GPS signal from a GPS (Global Positioning System) satellite. GPS sensor 14c and the like. 1 A of navigation apparatuses determine the display range of a map, a route search start point, etc. based on the present location of the vehicle detected by this present location detection apparatus 14, and display the present location on a map.

  The image memory 15 stores image data to be displayed on the display monitor 16. This image data includes map drawing data and various graphic data, which are appropriately generated based on the map data stored in the DVD-ROM 110 read by the disk drive 19. The navigation device 1A performs map display and the like by using the image data generated in this way.

  The disk drive 19 reads map data for displaying a map on the display monitor 16 from the DVD-ROM 110. The map data includes map display data, route search data, and the like. These data include road link information and node information. The map display data has map data of a plurality of scales from a wide area to details, and the scale of the display map can be changed according to the passenger's request. The map data may be read from a recording medium other than the DVD-ROM 110, such as a CD-ROM or a hard disk.

  The display monitor 16 provides various information such as a map near the vehicle position as a screen display to the occupant based on various information such as map data. The input device 17 has an input switch for a passenger to set various commands, and is realized by a remote controller or the like. The occupant manually operates the input device 17 according to instructions on the display screen of the display monitor 16 to select a destination and set the destination. Further, the map displayed on the display monitor 16 can be scrolled by operating the input device 17.

  When the destination is set by the occupant, the navigation device 1A calculates a route to the destination based on a predetermined algorithm, using the current location detected by the GPS sensor 14c as a departure location. The route thus obtained (hereinafter referred to as a recommended route) is displayed separately from other roads by changing the display form, for example, the display color. As a result, the passenger can recognize the recommended route on the map. In addition, the navigation device 1A instructs the occupant to travel in the traveling direction using a screen or voice so that the vehicle can travel according to the recommended route, thereby guiding the route of the vehicle.

  The configuration of the touch panel device 18A is shown in FIG. The touch panel device 18A includes a CPU 21A, a horizontal resistance film R1, a vertical resistance film R2, transistors Tr1 to Tr4, resistors R3 to R10, and a memory 22. The CPU 21A is the CPU of the control circuit 11, but will be described as a component of the touch panel device 18A for convenience.

  The CPU 21A controls on / off of the transistors Tr1 to Tr4, and detects the coordinates of the pressed position from the voltage values detected from the terminals AD1 and AD2.

  The base terminal of the PNP transistor Tr1 is connected to the terminal SW1 of the CPU 21A via the resistor R3, the power supply is connected to the emitter terminal of the transistor Tr1, the end a of the horizontal resistance film R1 is connected to the collector terminal, and the terminal AD1 of the CPU 21A. And are connected. The base terminal of the NPN transistor Tr2 is connected to the terminal SW2 of the CPU 11 via the resistor R4, the end b of the horizontal resistance film R1 is connected to the collector terminal of the transistor Tr2, and the emitter terminal is grounded.

  Similarly, the base terminal of the PNP transistor Tr3 is connected to the terminal SW3 of the CPU 21A via the resistor R5, the power source is connected to the emitter terminal of this transistor, and the end c of the vertical resistance film R2 is connected to the collector terminal of the CPU 21A. Terminal AD2 is connected. The base terminal of the NPN transistor Tr4 is connected to the terminal SW4 of the CPU 21A via the resistor R6, the end d of the vertical resistance film R2 is connected to the collector terminal of the transistor Tr4, and the emitter terminal is grounded. Note that AD1, AD2, SW2, and SW4 are grounded via R9, R11, R10, and R12, respectively.

  FIG. 3 is a cross-sectional view of the touch panel, and FIG. 4 is a perspective view of the touch panel as viewed from above. As shown in these drawings, the transparent resistive film type touch panel includes an ITO (Indium Tin Oxide) film 31 and ITO film 32, which are a kind of resistive film, via an outer peripheral spacer 33 or a dot spacer 34. Constructed by facing each other. Upper electrodes 41a and 41b are attached to both ends in the X-axis direction of the ITO film 31, and lower electrodes 42a and 42b are attached to both ends in the Y-axis direction of the ITO film 32, respectively. The ITO film 31 has a certain degree of elasticity. When pressure is applied to the upper surface of the ITO film 31, the portion where the pressure is applied bends and contacts the ITO film 32. Hereinafter, the ITO film-forming film 31 is referred to as a horizontal resistance film R1, and the ITO film-forming glass 32 is referred to as a vertical resistance film R2.

  FIG. 5 is a diagram illustrating the principle of coordinate detection of the touch panel of FIG. The position where the operator applies pressure (hereinafter referred to as a pressed position) is detected by applying a predetermined voltage to one of the upper electrodes 41a, 41b and the lower electrodes 42a, 42b. For example, FIG. 5A shows a state in which a predetermined voltage is applied between the upper electrodes 41a and 41b and the lower electrodes 42a and 42b are short-circuited. In FIG. 5A, the resistance of the horizontal resistance film R1 is shown. The resistance of r1 and the vertical resistance film R2 is r2. When pressure is applied to a predetermined location on the upper surface of the horizontal resistance film in this state, the horizontal resistance film R1 and the vertical resistance film R2 near the position where the pressure is applied come into contact. Since the horizontal resistance film R1 and the vertical resistance film R2 have different resistance values, the voltage between a and c in FIG. 5 (a) according to the horizontal (X-axis) coordinate position on the horizontal resistance film R1 to which pressure is applied. Changes. Therefore, by monitoring this voltage value, it is possible to accurately detect the horizontal (X-axis) coordinate position where pressure is applied with a pen or a finger.

  On the other hand, FIG. 5B shows a state where the upper electrode is short-circuited and a predetermined voltage is applied to the lower electrode. When pressure is applied to a predetermined portion of the horizontal resistance film R1 in this state, the horizontal resistance film R1 and the vertical resistance film R2 near the position where the pressure is applied come into contact, and the voltage between a and c in FIG. Change. Since this voltage changes according to the Y-axis coordinate position on the horizontal resistance film R1 to which pressure is applied, the Y-axis coordinate position to which pressure is applied can be accurately detected by monitoring this voltage value.

  Thus, in the transparent resistive film type touch panel shown in FIG. 4, the horizontal (X-axis) coordinates of the pressed position can be detected by applying a voltage to the upper electrodes 41a and 41b at both ends of the horizontal resistive film R1, and the vertical resistance By applying a voltage to the lower electrodes 42a and 42b at both ends of the film R2, the vertical (Y-axis) coordinates of the pressed position can be detected.

  The memory 22 in FIG. 2 is a non-volatile memory and stores the pressed coordinates when a predetermined button is pressed. Whether or not a predetermined button has been pressed is determined from the pressed button information output from the control circuit 11 described above.

  Next, calibration warning processing of the touch panel device 18A provided in the navigation device 1A according to the embodiment of the present invention will be described with reference to FIGS.

  In the embodiment of the present invention, a button for determining whether or not the touch panel device 18 </ b> A needs to be calibrated is determined in advance, and the reference data of the pressed position that is a reference for determination is acquired and stored in the memory 22. Reference data acquisition will be described with reference to FIG.

  FIG. 6 is a diagram showing a display screen of the map 62 displaying the vehicle position mark 61. A wide area display button 63 is displayed on the display screen of the map 62. The wide area display button 63 is a button for reducing the scale ratio of the map 62 and displaying a larger area map. Here, the wide area display button 63 is a button for determining whether calibration of the touch panel device 18A is necessary.

  Data of the pressed position 64 when the wide area display button 63 is pressed during the elapse of 30 days after the calibration of the touch panel device 18A is stored in the memory 22. Here, the pressing position 64 is indicated by a cross in the area of the wide area display button 63. Then, the average position of the pressing position 64 is calculated. Hereinafter, this average position is referred to as a reference average position. The reference average position is calculated by adding the X coordinate of the pressing position 64, adding the Y coordinate of the pressing position 64, and dividing the added X coordinate and Y coordinate of the pressing position 64 by the number of times of pressing, respectively. This reference average position is a reference position for determining whether calibration of the touch panel device 18A is necessary.

  Even after the reference average position is calculated, each time the wide area display button 63 is pressed, the pressed position is stored in the memory 22 and, for example, the average position of the last 30 pressed positions is calculated. Hereinafter, this average position is referred to as a detection average position.

  The resistance values of the horizontal resistance film R1 and the vertical resistance film R2 of the touch panel device 18A, the resistance values between the collectors and emitters of the transistors Tr1 to Tr4, and the like change with time. Due to this secular change, a difference occurs between the actually pressed position and the detected pressed position, and even if the wide area display button 63 is pressed, the map 62 is not displayed in a wide area. For this reason, when a secular change occurs, as shown in FIG. 7, the distribution of the pressed positions 64 determined to have pressed the wide area display button 63 is biased with respect to the center of the display area of the wide area display button 63. . That is, while the occupant is pressing the wide area display button 63 many times, it is empirically found that the occupant must deviate from the display area of the wide area display button 63 and press it. The distribution is biased as described above. In such a case, calibration is required for the touch panel device 18A.

  As shown in FIG. 6, when the distribution of the pressed positions 64 is deviated with respect to the center of the display area of the wide area display button 63, the detected average position deviates from a predetermined range centered on the reference average position. Therefore, the necessity of calibration of the touch panel device 18A can be determined by comparing the reference average position and the detection average position. When the detected average position deviates from a predetermined range centered on the reference average position, the touch panel device 18A is informed of the necessity of calibration of the touch panel device 18A, as shown in FIG. A warning screen 80 for prompting the calibration of 18A is displayed on the display monitor 16.

  When the warning screen 80 is displayed on the display monitor 16, the occupant brings the navigation device 1A to the vendor of the navigation device 1A or the vendor of the vehicle equipped with the navigation device 1A. Then, calibration of the touch panel device 18A is performed at the vendor.

  Next, warning screen display processing in the touch panel device 18A according to the first embodiment of the present invention will be described with reference to the flowcharts of FIGS. The processing of FIGS. 9 and 10 is executed in the CPU 21A by a program that starts when the touch panel device 18A is powered on.

  Here, when the touch panel device 18A is calibrated, information such as the pressed coordinates stored in the memory 22 of FIG. 2 is deleted. Further, it is assumed that the flag K for determining the calculation of the reference average position is 0, and t that represents the number of days elapsed since the calibration is performed is 0 (S900 in FIG. 9). When the value of the flag K is 0, it is determined that the reference average position has not been calculated. When the value of the flag K is 1, it is determined that the reference average position has been calculated.

  In step S901, it is determined whether the horizontal resistance film R1 has been pressed. If it is pressed, an affirmative decision is made in step S901 and the process proceeds to step S902. If it is not pressed, it returns as it is. In step S902, the push button information is acquired from the control circuit 11. In step S903, it is determined whether the wide area display button 63 is pressed based on the press button information. When the wide area display button 63 is pressed, an affirmative determination is made in step S903, and the process proceeds to step S904. If not pressed, a negative determination is made in step S903, and the process returns. In step S904, the coordinates of the pressed position are stored in the memory 22.

  In step S905, it is determined whether t exceeds 30 days. If a positive determination is made in step S905, the process proceeds to step S906, and if a negative determination is made in step S905, the process returns. In step S906, it is determined whether the value of K is zero. In the case of 0, affirmative determination is made in step S906, and the process proceeds to step S907. If not 0, a negative determination is made in step S906, and the process returns. In step S907, a reference average position is calculated. In step S908, the value of K is set to 1.

  Thus, the average value of the wide area display button 63 after calibration is calculated, and the process proceeds to the calibration necessity determination process shown in FIG.

  Subsequent to step S908, in step S1001 of FIG. 10, it is determined whether the horizontal resistance film R1 is pressed. If it is pressed, an affirmative decision is made in step S1001 and the process proceeds to step S1002. If it is not pressed, it returns as it is. In step S1002, the push button information is acquired from the control circuit 11. In step S1003, it is determined whether the wide area display button 63 is pressed based on the press button information. When the wide area display button 63 is pressed, an affirmative determination is made in step S1003 and the process proceeds to step S1004. If not pressed, a negative determination is made in step S1003, and the process returns. In step S1004, the position coordinates of the pressed position are stored in the memory 22.

  In step S1005, the last 30 pressed positions are extracted from the memory 22, and in step S1006, the detected average position is calculated. In step S1007, it is determined whether the detected average position is within a predetermined range from the reference average position. If the position is not within the predetermined range, a negative determination is made in step S1007, and the process proceeds to step S1008. If it is within the predetermined range, an affirmative decision is made in step S1007 and the routine returns. In step S1008, the control circuit 11 is instructed to display a warning screen 80 that prompts calibration of the touch panel device 18A when the navigation device 1A is activated next time.

The navigation device 1A according to the first embodiment described above has the following operational effects.
(1) The necessity of calibration of the touch panel device 18A is notified based on the pressed position when the wide area display button 63 is pressed a plurality of times. Therefore, it is possible to determine when it is necessary to calibrate the touch panel in daily pressing operations on the touch panel without requiring a separate operation for determining whether the touch panel device 18A needs to be calibrated.

(2) Both the reference average position serving as a reference for determining the necessity of calibration of the touch panel device 18A and the detected average position compared with the reference average position are calculated while using the touch panel device 18A. Since the operation of calculating the reference position for determining the necessity of calibration of the touch panel device 18A is not necessary, the convenience of the passenger is improved.

(3) The average position of the pressed position (reference average position) when the wide area display button 63 is pressed in a predetermined period immediately after the calibration of the touch panel device 18A, and the average position of the pressed position at the most recent predetermined number of times of pressing. By comparing (detected average position) with the touch panel device 18A, it is determined that calibration is necessary, and a notification is made. Therefore, the touch panel device 18A can be calibrated at an appropriate time.

-Second Embodiment-
In the navigation device 1A in the first embodiment, only the necessity of calibration of the touch panel device 18A is notified, but in the navigation device 1B in the second embodiment, the calibration of the touch panel device 18B is instructed by an occupant's instruction. Also do. Since the configuration of the navigation device 1B according to the second embodiment of the present invention is the same as the configuration of the navigation device 1A according to the first embodiment, the description thereof is omitted.

  A calibration process of the touch panel device 18B provided in the navigation device 1B according to the second embodiment of the present invention will be described with reference to FIGS.

  In the second embodiment of the present invention, a plurality of buttons 201a to 201d for determining whether or not the touch panel device 18B needs to be calibrated is determined in advance, and the press when it is determined that each button is pressed. The position is detected and stored in the memory 22. Hereinafter, the buttons 201a to 201d for determining whether calibration is necessary are referred to as calibration necessity determination buttons. Then, the necessity of calibration is determined using the button having the highest number of presses among the calibration necessity determination buttons 201a to 201d. Hereinafter, the button having the highest number of presses is referred to as the most frequent button.

  The determination as to whether or not the touch panel device 18B needs to be calibrated starts when the frequency button is pressed 1000 times. As shown in FIG. 11, the button 201a is the button with the highest pressing frequency, and this button 201a is the most frequently used button. Then, the reference average position (X0, Y0) of the button 201a is calculated from the pressed position where the frequency of pressing the most frequent button 201a is 1000 times after calibration, and the most recent 30 pressed positions of the most frequently button 201a. From the above, the detection average position (X1, Y1) of the most frequent button 201a is calculated.

  When the detection average position of the most frequent button 201a is not within the predetermined range from the reference average position, that is, the detection average position (X1, Y1) of the most frequent button 201a is compared with the reference average position (X0, Y0). When −X1 | ≧ ΔX0 or | Y0−Y1 | ≧ ΔY0 (ΔX0 and ΔY0 are predetermined values), a calibration screen that notifies the necessity of calibration and inquires about the necessity of calibration as shown in FIG. 203 is displayed. On the calibration screen 203, a YES button 203a and a NO button 203b are displayed together with an inquiry sentence “Detected coordinates of the touch panel have shifted. Do you want to calibrate the touch panel?”. When the YES button 203a is pressed, calibration of the touch panel device 18B is started, and when the NO button 203b is pressed, the calibration screen 203 is deleted without performing calibration.

Calibration of the touch panel device 18 is performed as follows.
The difference (ΔX1 = X1−X0) between the X coordinate of the detected average position and the X coordinate of the reference average position and the difference (ΔY1 = Y1−Y0) between the Y coordinate of the detected average position and the Y coordinate of the reference average position are calculated. . Hereinafter, the difference ΔX1 is referred to as an X coordinate correction amount, and the difference ΔY1 is referred to as a Y coordinate correction amount. Thereafter, the touch panel device 18B adds the X coordinate correction amount ΔX1 to the detected X coordinate and adds the X coordinate correction amount ΔY1 to the Y coordinate. For example, when the pressed position of the coordinates (X, Y) is detected, the pressed coordinates (X + ΔX1, Y + ΔY1) are output to the control circuit 11.

  As a result of the calibration as described above, the detected pressing position is corrected and output to the control circuit 11, and thereafter, as shown in FIG. 12, the display positions of the calibration necessity determination buttons 201a to 201d are displayed. When the deviation from the pressing positions 202a to 202d is eliminated and the display range of the calibration necessity determination buttons 201a to 201d is pressed, the processing defined in the calibration necessity determination buttons 201a to 201d is executed.

  Next, calibration processing in the touch panel device 18B according to the second embodiment of the present invention will be described with reference to the flowcharts of FIGS. 13 and 14 are executed in the CPU 21B by a program that starts when the touch panel device 18B is powered on. 13 and 14 are performed for all the calibration necessity determination buttons 201a to 201d, respectively. Note that the same processing as the warning screen display processing in the first embodiment is denoted by the same reference numeral, and description thereof is omitted.

  Here, when the touch panel device 18B is calibrated, information such as the pressed coordinates stored in the memory 22 is erased as in the first embodiment. Also, a flag K for determining the calculation of the reference average position is set to 0, a flag L for determining whether the button is the most frequent button is set to 0, and a variable n indicating the number of presses after the calibration is performed is set to 0. (S1300 in FIG. 13). When the value of the flag L is 0, the button is determined as the most frequent button, and when the value of the flag L is 1, the button is determined not to be the most frequent button. Further, until it is determined that one button is the most frequent button, all the calibration necessity determination buttons are regarded as the most frequent buttons.

  In step S1301, it is determined whether the value of the flag L is 0. If the value of L is 0, step S1301 is affirmed and the process proceeds to step S901. If the value of L is 1, a negative determination is made in step S1301, and the process returns. In step S1302 following step S904, 1 is added to the variable n. In step S1303, it is determined whether the value of the variable n is 1000. If the value of the variable n is 1000, an affirmative determination is made in step S1303 and the process proceeds to step S1304. If the value of the variable n is not 1000, a negative determination is made in step S1303, and the process returns.

  In step S1304, among the four calibration necessity determination buttons 201a to 201d, the value of the flag L of the three calibration necessity determination buttons 201b to 201d that are not pressed this time is set to 1. As a result, the button 201a that has been pressed 1000 times becomes the most frequent button, and the other buttons 201b to 201d, that is, buttons that have not yet reached 1000 times are not the most frequently pressed buttons. If it is determined in step S906 that K = 0, the reference average position (X0, Y0) is calculated in step S1305, and 1 is substituted into the flag K in step S908.

  As described above, the average value of the frequency button 201a after calibration is calculated, and the process proceeds to the calibration process in FIG.

  When proceeding from step S1001, step S1004, and step S1005 of FIG. 14 to step S1401, the average detection position (X1, Y1) of the most frequent button 201a is calculated. In step S1402, it is determined whether | X0−X1 | ≧ ΔX0 or | Y0−Y1 | ≧ ΔY0 (ΔX0 and ΔY0 are predetermined values). If a positive determination is made in step S1402, the process proceeds to step S1403. If a negative determination is made in step S1402, the process returns.

  In step S1403, an X coordinate correction amount ΔX1 and a Y coordinate correction amount ΔY1 are calculated. Thereafter, when the pressed position (X, Y) is detected in the touch panel device 18B, the corrected pressed position (X + ΔX1, Y + ΔY1) is output to the control circuit 11.

  In step S1404, since the touch panel device 18B has been calibrated, information such as the pressed coordinates stored in the memory 22 is deleted for all the calibration necessity determination buttons 201a to 201d, the flag K is set to 0, and A flag L for determining the frequency button is set to 0, and a variable n representing the number of presses is set to 0.

The navigation device 1B according to the second embodiment described above has the following operational effects.
(1) When notifying the calibration of the touch panel device 18B, the passenger is inquired about the necessity of calibration execution. When the occupant requests calibration, the touch panel device 18B is calibrated using the detected average position and the reference average position. Therefore, it is not necessary to perform calibration separately, and passenger convenience is improved.

(2) A plurality of calibration necessity determination buttons 201a to 201d are set, and the touch panel device 18B is calibrated on the basis of the button having the highest number of presses. Therefore, it is possible to eliminate the shift in coordinates detected by the touch panel with priority on frequently used buttons.

The navigation devices 1A and 1B according to the above embodiments can be modified as follows.
(1) The calibration warning screen 80 or the calibration screen 203 is displayed based on the average position of the pressing positions of the calibration necessity determination buttons. However, the calibration warning screen 80 and the calibration screen 203 may be displayed based on the dispersion of the pressed positions of the calibration necessity determination buttons. When the touch area of the calibration necessity determination button is deviated from the display position of the button, the position is shifted and pressed again, so that the dispersion of the pressed positions increases. Therefore, it is possible to determine that it is time for calibration when the dispersion of the pressed positions is equal to or greater than a predetermined value.

(2) In the second embodiment, whether or not the touch panel device 18B needs to be calibrated is determined based on the reference average position and the detected average position of the most frequent button among the plurality of calibration necessity determination buttons. The touch panel device 18B may be calibrated based on the reference average position and the detection average position of the plurality of calibration necessity determination buttons. For example, as shown in FIG. 15, the detection average position X1 and the X coordinate correction amount ΔX1 in a plurality of calibration necessity determination buttons are plotted. Then, an approximate expression 150 is created. The approximate expression may be a linear line or a quadratic curve as long as it fits to each measurement point, and is not particularly limited. After creating the approximate expression 150, an X coordinate correction amount (ΔX) is calculated from the X coordinate (X) of the pressed position detected by the touch panel device 18B, and X + ΔX is output to the control circuit 11 as the X coordinate of the detected pressed position. Similarly, the Y coordinate correction amount (ΔY) is calculated from the Y coordinate (Y) of the pressing position from the approximate expression, and Y + ΔY is output to the control circuit 11 as the Y coordinate of the detected pressing position. Thus, by performing calibration using a plurality of buttons, it is possible to further reduce the deviation between the pressed position output from the touch panel device 18B to the control circuit 11 and the pressed position on the display screen.

(3) Although the calibration warning screen 80 is displayed on the display screen and the touch panel is informed that calibration is necessary, the notification means is not limited to the embodiment. For example, an LED (Light Emitting Diode) may be provided on the touch panel device 18A, and the LED may be turned on when calibration is required.

(4) Although it has been determined that the touch panel devices 18A and 18B need calibration based on the average position and variance of the pressed positions, the pressing position serving as a reference for determination is not limited to the average position and variance of the pressed positions. . For example, immediately after the calibration of the touch panel device 18A is performed within a predetermined period of time, or the pressing position with the highest pressing frequency among the pressing positions when pressed a predetermined number of times, and the most of the most recent predetermined number of pressing positions. It may be determined and notified that the touch panel device 18A needs to be calibrated by comparing with a position where the pressing frequency is high. Similarly, the reference position for calibration of the touch panel device 18B is not limited to the average position.

(5) In the navigation device 1B according to the first embodiment, determination of necessity of calibration is started after 30 days from the end of calibration, and the reference average position is calculated using the average value of the pressed positions. However, after the calibration is completed, the determination of necessity of calibration is started after being pressed a predetermined number of times (for example, 1000 times), and the reference average position is determined a predetermined number of times (for example, It may be calculated using the average value of the pressed positions (1000 times).

It is a block diagram which shows the structure of the navigation apparatus of the 1st Embodiment of this invention. It is a figure which shows the structure of the touchscreen apparatus of the 1st Embodiment of this invention. It is a cross-sectional view of a touch panel. It is the perspective view which looked at the touch panel from the upper surface direction. It is a coordinate detection principle figure of the touch panel of FIG. It is a figure which shows the press position in the wide region display button after calibration was performed. It is a figure which shows the press position in a wide area | region display button when the detection position of a press and the press position on a screen have shifted | deviated by the secular change of the touch panel apparatus. It is a figure for demonstrating the warning screen which prompts the calibration of a touchscreen apparatus. It is a flowchart for demonstrating a reference | standard average position calculation process. It is a flowchart for demonstrating a warning screen display process. It is a figure for demonstrating a calibration screen. It is a figure for demonstrating the relationship between the press position after a calibration, and the display position of a button. It is a flowchart for demonstrating a calibration process. It is a flowchart for demonstrating a calibration process. It is a figure for demonstrating the calibration of the touchscreen apparatus by the reference | standard average position and detection average position of a some button.

Explanation of symbols

1A Navigation device 11 Control circuit 16 Display monitor 18A Touch panel device 21A CPU
22 Memory R1 Horizontal resistance film R2 Vertical resistance film

Claims (11)

A touch panel that outputs a signal corresponding to the pressed position;
A display with a touch panel, comprising: control means for notifying the necessity of calibration for the detection output of the touch panel based on a pressing position when a predetermined area set on the touch panel is pressed a plurality of times. apparatus. The display device with a touch panel according to claim 1,
The control means includes
Calculating means for calculating an average value (detected average value) of the plurality of pressing positions;
A display device with a touch panel, comprising: a determination unit that compares the average value calculated by the calculation unit with a reference position of the predetermined region to determine the necessity of the calibration. The display device with a touch panel according to claim 2,
The display device with a touch panel, wherein the reference position is an average value (reference average value) of pressing positions when the predetermined area is pressed a plurality of times after the calibration is completed. The display device with a touch panel according to claim 3,
The determination means starts determining whether or not the calibration is necessary every predetermined period after the calibration ends or every time the number of times pressed after the calibration ends reaches a predetermined value. Display device with touch panel. The display device with a touch panel according to claim 3 or 4,
The display device with a touch panel, wherein the determination unit determines that the calibration is necessary when a difference between the reference average value and the detection average value is a predetermined value or more. The display device with a touch panel according to any one of claims 1 to 5,
When notifying the necessity of the calibration, the control means confirms whether the calibration needs to be performed,
A display device with a touch panel, further comprising execution means for executing the calibration when it is confirmed that the calibration needs to be executed. The display device with a touch panel according to claim 6,
The display device with a touch panel, wherein the execution means calibrates an output signal of the touch panel based on a difference between the reference average value and the detected average value. The display device with a touch panel according to claim 1,
The control means includes
Dispersion of each pressing position when the predetermined area is pressed a plurality of times after the calibration is finished, and dispersion of each pressing position when the predetermined area is pressed a plurality of times after the dispersion is calculated Calculating means for calculating
A display device with a touch panel, comprising: determination means for determining the necessity of the calibration based on the both variances. The display device with a touch panel according to claim 8,
The determination means starts determining whether or not the calibration is necessary every predetermined period after the calibration ends or every time the number of times pressed after the calibration ends reaches a predetermined value. Display device with touch panel. The display device with a touch panel according to claim 7,
The control means needs to calibrate the detection output of the touch panel based on a pressing position when a region having the highest number of pressings is pressed a plurality of times among a plurality of predetermined regions set on the touch panel. ,
The display device with a touch panel, wherein the execution means calibrates the output signal of the touch panel based on a difference between the reference average value and the detection average value in the region where the number of times of pressing is the largest. A navigation device comprising the display device with a touch panel according to any one of claims 1 to 10.

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