JP2002149348A - Touch panel input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically proofread the depression detection coordinate of a touch panel in a regular use state without permitting a user to be conscious of it. SOLUTION: Operation keys positioned in the diagonal of a picture are set to be observation keys for proofreading CB1 and CB2 among a plurality of operation keys SB displayed on the picture. The proofreading coefficient of the depression detection coordinate of the whole touch panel is calculated based on the depression detection coordinate with respect to the observation key for proofreading and the center coordinate of key display. Then, a subsequent depression detection coordinate is corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch panel input device in which a touch panel is arranged on a display screen and an input is performed by pressing a range of the touch panel corresponding to an operation button displayed on the screen. The present invention relates to a touch panel input device for calibrating pressure detection coordinates of an arranged touch panel.

[0002]

2. Description of the Related Art A touch panel input device used for OA equipment, AV equipment, in-vehicle equipment, etc. has a touch panel arranged on a screen of a display device, displays a plurality of operation buttons on the screen, and corresponds to each operation button. Operation input is performed by pressing the range on the touch panel that has been set. The user operates the device by pressing on the operation button displayed on the screen.

[0003] Such a touch panel input device includes, for example, a resistive touch panel. The resistive touch panel is an analog touch panel provided with resistive films on upper and lower layers. The voltage data is extracted from the voltage drop according to the value, the pressed position is specified from the X-axis and Y-axis voltage data, and output to the control unit. The control unit receives an operation corresponding to the pressed position, and performs a predetermined operation. It is supposed to do.

In general, in a resistive touch panel, a pair of resistive films having a linear resistance characteristic are opposed to each other via a micro-spacer such as an insulating resin. When pressed by a finger or a pen tip, the pair of resistive films contact each other at the pressed position, apply a predetermined voltage to one resistive film, and contact the pair of resistive films by this press. A one-dimensional coordinate position is specified by reading a resistance partial pressure value at a point, and a two-dimensional coordinate position is specified by sequentially switching and measuring the one-dimensional coordinate position in the X coordinate axis direction and the Y coordinate axis direction. .

In a system in which an operation button displayed on a screen is pressed through a touch panel arranged on the screen, the button display position and the pressed coordinates on the touch panel must have a fixed relationship. However, since the displacement between the screen and the touch panel, the displacement of the screen display, and the displacement of the pressure detection coordinates due to aging occur, it is necessary to calibrate the pressure detection coordinates.

Conventionally, the calibration of the pressed detection coordinates is performed by displaying two input points in the vicinity of a diagonal of the screen, and detecting coordinates and coordinates of the input point display by the user pressing on the input point display. The calibration coefficient is obtained based on the deviation of the touch panel, and the detected coordinates of the entire touch panel are corrected.

FIG. 7 is a diagram for explaining the principle of calibration of the touch detection coordinates of the touch panel. In the figure, TP is a touch panel, and DSP is a display unit. When performing calibration,
Two input points a (Xa, Ya) and b (X
b, Yb) is displayed, and the user is pressed on the input point. Here, the pressed detection coordinates for each input point are A
If (XA, YA) and B (XB, YB), then the X-axis calibration coefficient Kx is calculated as Kx = (Xb-Xa) / (XB-X
A), the calibration coefficient of the Y axis is Ky = (Yb−Ya) / (YB
-YA). The coordinates detected when an arbitrary position C on the touch panel TP is pressed are (XC, YC), and the corresponding coordinates c (Xc, YC) on the display unit DSP.
In the case of c), the coordinates (Xc, Yc) of point c are given by Can be represented. Xc = Xa + Kx (XC-XA) Yc = Ya + Ky (YC-YA) In this manner, the correction of the detected coordinates is performed for an arbitrary pressed position c on the touch panel using the calibration coefficient.

[0008]

By the way, when the pressed position and the detected position do not match due to aging during use of the touch panel or the like, the user himself performs a predetermined operation each time to display the input point on the screen. In this case, it is necessary to calibrate the detection coordinates, which is complicated.

If the resistance value of the resistive film of the touch panel has a high linearity, the entire touch panel may be calibrated based on the displacement of the press detection coordinates with respect to two input points near the screen diagonal. When the linearity of the resistance value is not good over the entire surface on the touch panel, if the calibration process of the entire touch panel is performed from the pressing coordinates of the two input points on the screen diagonal, the calibration may not be complete depending on a certain area of the touch panel . Therefore, when performing calibration, a plurality of input points may be displayed in a grid pattern on the screen, and the calibration processing may be performed based on the shift of the pressed detection coordinates with respect to all the input points. However, it is troublesome to perform a pressing operation on many input points.

As described above, an object of the present invention is to provide a touch panel input device for automatically calibrating the touch detection coordinates of a touch panel in a normal use state without the user's awareness.

It is another object of the present invention to provide a touch panel input device capable of calibrating the touch detection coordinates of a touch panel that enhances the accuracy of the touch detection coordinates of the touch panel having poor resistance film linearity.

[0012]

According to the present invention, there is provided a touch panel input device for arranging a touch panel on a screen and pressing an area corresponding to each of a plurality of operation buttons displayed on the screen to perform input. , At least two or more operation buttons of the plurality of operation buttons displayed on the screen are set as observation buttons for calibration of pressure detection coordinates, and the detection coordinates for at least two calibration observation buttons and the center coordinates of the observation buttons for calibration This is achieved by a touch panel input device that calibrates the touch detection coordinates of the touch panel based on the above. That is, if you do the above,
It is possible to automatically calibrate the touch detection coordinates of the touch panel from the touch detection coordinates for the calibration observation button in the normal operation and the center coordinates of the corresponding operation button.

Further, according to the present invention, an average coordinate of a predetermined number of press detection coordinates with respect to the calibration observation button is calculated, and the press detection coordinate is outside a predetermined range from a center coordinate of the calibration observation button. This is achieved by a touch panel input device that calibrates the press detection coordinates of the touch panel based on the pressed detection coordinates for the calibration observation button and the center coordinates of the calibration observation button when. In other words, according to the above, it is possible to automatically calibrate the touch detection coordinates of the touch panel when the pressed coordinates for the calibration observation button are out of the predetermined range from the center of the calibration observation button in the normal operation. .

Further, according to the present invention, according to the present invention, an input receiving area for the calibration observation button is divided into a plurality of areas, and representative coordinates are set for each area, and pressing on the calibration observation button is performed. This is achieved by a touch panel input device that calibrates the touch detection coordinates of the touch panel based on the representative coordinates of the region including the coordinates and the center coordinates of the calibration observation button. That is, according to the above, the touch coordinates of the touch panel can be automatically calibrated from the representative coordinates of the area to which the press detection coordinates for the calibration observation button belong and the center coordinates of the calibration observation button display.

Further, according to the present invention, there is provided a touch panel input device in which a touch panel is arranged on a screen and an input is performed by pressing an area corresponding to an operation button displayed on the screen. First calibration means for displaying two calibration input points near a corner, and calibrating the touch detection coordinates of the touch panel by pressing the displayed input points, and a plurality of calibrations in a grid pattern on the screen Calibration means for displaying input points for use and for calibrating the touch detection coordinates of the touch panel by pressing the displayed input points, and calibration means switching means for switching between the first calibration means and the second calibration means This is achieved by a touch panel input device having: Further, according to the present invention, the above object is achieved by a touch panel input device that performs calibration for each rectangular area having vertices at input points arranged and displayed in a grid. That is, if configured as described above, a method of calibrating the pressure detection coordinates of the entire touch panel from the pressure detection coordinates for the two input points, and a method of calibrating the pressure detection coordinates for each area from the pressure detection coordinates for the input points arranged in a grid pattern Can be switched according to the situation.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 is a configuration diagram of a main part of a touch panel input device according to a first embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a touch panel, 12 denotes a display unit such as an LCD, 13 denotes a touch panel control unit, and 14 denotes a control unit.

The touch panel 11 is a resistive touch panel, in which a pair of transparent resistive films having a resistance value of a linear characteristic are superimposed via a spacer, and one of the resistive films (upper transparent resistive film) in the X coordinate axis direction. Electrodes are provided at both ends, and electrodes are provided at both ends in the Y coordinate axis direction of the other resistive film (lower transparent resistive film). When the resistive film surface is not pressed, the upper transparent resistive film and the lower transparent resistive film contact each other. Without being pressed, the upper transparent resistive film and the lower transparent resistive film are configured to come into contact at the pressing point at this time, and a voltage corresponding to the X-axis coordinate and the Y-axis coordinate is applied to the touch panel control unit 13. Output to

The touch panel control section 13 has a function of specifying a two-dimensional coordinate position (X coordinate, Y coordinate) of a pressed point on the touch panel based on voltages of the X axis and the Y axis input from the touch panel 11. .

The control unit 14 displays operation buttons on the display unit 12 according to instructions from other devices, and determines which operation button has been pressed based on the pressed coordinates input from the touch panel control unit 13. A control signal corresponding to the pressed button is output to another device or the like. Further, the control unit 14 has a function of calibrating the pressure detection coordinates of the touch panel, and calibrates the pressure detection coordinates of the entire touch panel based on the pressure detection coordinates for the two reference input points.

FIG. 2 is a diagram showing a display example of the touch panel input device in the first embodiment. In the figure, DS
P is a display with a touch panel, SB is a normal operation button display, and CB1 and CB2 are operation button displays also serving as calibration observation buttons.

Two calibration observation buttons CB1, CB2
Is located near the diagonal of the display DSP,
The calibration observation buttons CB1 and CB2 also function as normal operation buttons. For example, the calibration observation buttons CB1 and CB2 are assigned functions that are used with a certain frequency, such as a menu button and a power-off button, while using devices.

FIG. 3 is a diagram showing the relationship between the display of the calibration observation button and the input acceptance range. As shown in FIG. 3, the input acceptance range for the calibration observation button display CB is set to be divided into two areas, an inner area IA and an outer area OA of the button display center area.

The control unit 14 does not perform the calibration process based on the press coordinates from the touch panel control unit 13 when the press detection coordinates for the calibration observation button display are in the inside area IA, and When the area is the area OA, the calibration processing is performed. When there is a press on the calibration observation button within the reception range, the control unit 14 performs a predetermined operation (for example, a menu display in the case of a menu button) determined on the button and sets the press detection coordinates to the outside. In the case of the area OA, a calibration coefficient is calculated from the center coordinates of the calibration observation button and the pressed detection coordinates, and thereafter, the pressed detection coordinates are corrected using the calibration coefficients.

With the above arrangement, the touch detection coordinates of the touch panel can be automatically calibrated while the touch panel is being used for normal device operation.

Second Embodiment In the second embodiment, as in the first embodiment, two operation buttons and a calibration observation button are also displayed diagonally on the display, and the pressing detection coordinates for this calibration observation button are displayed. The calibration process is performed based on the calibration. The configuration of the touch panel in the second embodiment is the same as that described in the first embodiment.

FIG. 4 is an explanatory diagram of a calibration observation button display CB and a reception area in the second embodiment. The input acceptance area for the calibration observation button is divided into multiple areas,
The center area IA of the button display and the outside reception area are defined as an upper left area UL, a lower left area DL, an upper right area UR, and a lower right area DR.
Are divided into four areas. Also, representative coordinates are set for each of these four areas.

When an input is performed on the calibration observation button while the user is performing a normal operation, the control unit 14 determines which area of the pressed detection coordinate is to be located on the calibration observation button. However, in the case of the inner area IA, the calibration processing is not performed, and when the pressed detection coordinates are any of the outer upper left, lower left, upper right, and lower right areas, the center coordinates of the button display and the pressed detection coordinates belong to the area. A calibration coefficient is obtained based on the representative coordinates of the area, and thereafter, the touch detection coordinates of the touch panel are corrected using the calibration coefficient.

In this way, the calibration coefficients can be calculated using the representative coordinates of each area and the center coordinates of the button display, and the calibration coefficients can be easily calculated.

Further, an average value of a predetermined number of past times of the pressed detection coordinates with respect to the calibration observation button is calculated, and when the average pressed detection coordinate is located outside the display of the calibration observation button,
The touch detection coordinate of the touch panel may be calibrated based on the center coordinates of the button display and the press detection average coordinates. With this configuration, the calibration is performed when the average pressed detection coordinate deviates from the center of the button display. Calibration can be performed when the detected coordinates deviate. Further, in the above description of the embodiment, the calibration observation buttons are described as two diagonals on the screen, but four calibration buttons may be arranged at four corners of the screen.

Third Embodiment FIG. 5 is a diagram showing a main configuration of a touch panel input device according to a third embodiment. In FIG. 5, 11 is a touch panel,
12 is a display unit such as an LCD, 13 is a touch panel control unit,
Reference numeral 15 denotes a control unit.

The control unit 15 has two calibration methods: a first calibration method in which the number of input points displayed during calibration is two diagonal points on the screen, and a second calibration method in which a plurality of input points are displayed in a grid on the screen. Is stored, and the calibration method can be switched according to a user's instruction. The switching of the calibration method may be performed by the user selecting from a menu display or the like displayed on the display unit 12.

FIG. 6 is a diagram showing an example of input point display in the third embodiment. FIG. 6A is a display example in the first calibration method for displaying two input points diagonally on the screen. 6 (b)
Is a display example in the second calibration method for displaying a plurality of input points on the screen in a grid pattern.

In the first calibration method, input points IP are displayed at two diagonal points on the screen DSP of the display unit 12, and the user presses a position on the touch panel 11 in accordance with the input points.
The control unit 15 calculates a calibration coefficient of the press detection coordinates of the entire touch panel from the press detection coordinates for each input point detected by the touch panel control unit 13 and the coordinates of the input point display.

In the second calibration method, a plurality of input points IP are displayed on the screen DSP of the display unit 12 in a grid pattern. In this example, a total of 63 input points of 7 × 9 are displayed. The user presses on the touch panel 11 according to each input point. The control unit 15 calculates a calibration coefficient from the pressed detection coordinates and the display coordinates for each input point detected by the touch panel control unit 13. The calculation of the calibration coefficient is performed for each area surrounded by the four input points. For example, the calibration coefficient in the area CA1 is calculated from the coordinates of the input points that are the four vertices of the area CA1 and the pressed detection coordinates for each input point. Similarly, a calibration coefficient is calculated for each area, and then the touch detection coordinates of the touch panel are corrected.

According to the above, the first calibration method in which two input points are displayed and the second calibration method in which a plurality of input points are arranged and displayed in a lattice are switched and performed. Can be.

The present invention has been described with reference to the embodiments.
The present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention does not exclude these.

[0037]

As described above, according to the present invention, the calibration observation button, which is also used as an operation button, is displayed at the diagonal on the screen, the center coordinates of the calibration observation button display, and the pressing input to the calibration observation button are detected. Because the touch panel is calibrated based on the coordinates, it is possible to automatically calibrate the touch detection coordinates of the touch panel during normal use by the user, and to calibrate without the user's awareness. Can be done conveniently.

According to the present invention, the input receiving area for the calibration observation button is divided into a plurality of areas, representative coordinates are set for each area, and the area to which the pressed detection coordinates for the calibration observation button belongs is set. Since the calibration is performed based on the representative coordinates of the above and the center coordinates of the button display, the calibration coefficient can be easily calculated.

Further, according to the present invention, a first calibration method for performing calibration based on the pressed detection coordinates and input point display coordinates for two input points on the screen diagonal, and a plurality of input points in a grid pattern on the screen. Since the second calibration method for performing the display and performing the calibration for each area is switched, the calibration method can be properly used depending on the situation. For example, at the time of shipment from the factory, calibration is performed for each area of the screen using a large number of input points, and calibration is performed using two input points to perform calibration when the user is using the screen. And the complexity of the user can be improved. Further, by performing calibration using a large number of input points, it is possible to accurately detect the pressed detection coordinates even if there is a touch panel having poor linearity of the resistive film or linearity is deteriorated due to aging.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of a touch panel according to a first embodiment.

FIG. 2 is a display example of the touch panel input device in the first embodiment.

FIG. 3 is a diagram showing a relationship between a calibration observation button display and an input acceptance range in the first embodiment.

FIG. 4 is a diagram showing a relationship between a calibration observation button display and an input acceptance range in a second embodiment.

FIG. 5 is a main part configuration diagram of a touch panel input device of a third embodiment.

FIG. 6 is a diagram showing an example of an input point display in the third embodiment.

FIG. 7 is a diagram for explaining the principle of calibration of the touch detection coordinates of the touch panel.

[Explanation of symbols]

 11 touch panel 12 display unit 13 touch panel control unit 14, 15 control unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B068 AA01 AA22 BD20 BE08 BE11 CD02 CD06 DD13 5B087 AA00 AD01 CC26 DD02 DD10 DE03

Claims (5)

[Claims] 1. A touch panel input device in which a touch panel is arranged on a screen and an input is performed by pressing an area corresponding to each of the plurality of operation buttons displayed on the screen. At least two or more operation buttons are observing buttons for calibration of press detection coordinates, and based on the press detection coordinates for at least two calibration observation buttons and the center coordinates of the calibration observation buttons, the touch detection coordinates of the touch panel are determined. A touch panel input device for performing calibration. 2. An average coordinate of press detection coordinates of a predetermined number of times with respect to the calibration observation button is calculated, and when the press detection average coordinate is out of a predetermined range from a center coordinate of the calibration observation button, the calibration coordinate is calculated. 2. The touch panel input device according to claim 1, wherein calibration of the touch detection coordinates of the touch panel is performed based on the average coordinates of the detection of the pressing of the observation button and the center coordinates of the observation button for calibration. 3. 3. An input receiving area for the calibration observation button is divided into a plurality of areas, and representative coordinates for each area are set, and representative coordinates of the area including pressed coordinates for the calibration observation button are set. 3. The touch panel input device according to claim 1, wherein calibration of the touch detection coordinates of the touch panel is performed based on a central coordinate of the calibration observation button. 4. A touch panel input device in which a touch panel is arranged on a screen and an input is performed by pressing an area corresponding to an operation button to be displayed on the screen, wherein two points of calibration input are provided near a diagonal on the screen. Display points,
First calibration means for calibrating the touch detection coordinates of the touch panel by pressing the displayed input point; and displaying a plurality of calibration input points in a grid on the screen, and pressing the displayed input point. A touch panel input device, comprising: a second calibration unit that calibrates a touch detection coordinate of the touch panel by performing the operation, and a calibration unit switching unit that switches between the first calibration unit and the second calibration unit. 5. The touch panel input device according to claim 4, wherein the second calibration unit performs calibration for each rectangular area having vertices at input points arranged and displayed in a grid.