JPH07311655A - Touch panel input device - Google Patents

Abstract

(57) [Summary] [Object] The present invention is, in a touch panel input device provided to be superimposed on a display screen of an electronic information device, without the need for the user to perform calibration adjustment by himself or herself. The purpose is to prevent. [Structure] When touch input is performed on the clock mode icon displayed on the liquid crystal display unit 21 by the touch panel 12, a touch position detection voltage Vout from the touch panel 12 is input.
The touch position data via the A / D converter 14 corresponding to the touch position data history register 20 is touched each time the touch operation is performed.
Are shifted in and stored as S1 to S10,
When a difference of a predetermined value C or more between the average touch position data SAV of the past 10 times and the average touch position data S of 10 times up to this time is detected, the difference of the touch position data (S-SAV).
The reference data Xmin, Xmax, Ymin, Ymax set in the touch position reference data register 19 is reset based on the above.

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 provided on a display screen of an electronic information device such as an electronic notebook and used to obtain coordinates on the screen corresponding to the pressed position.

[0002]

2. Description of the Related Art In recent years, in electronic information devices such as an electronic notebook and a pocket computer, a touch panel type input device provided so as to overlap the display screen has been used, and a menu or keyboard displayed on the screen can be directly touched. You can perform input operations and display characters and figures by handwriting.

That is, in the touch panel input device, a voltage corresponding to a touched position on the touch panel is output. By converting the output voltage value into XY coordinates on the display screen, the input key corresponding to the touched position is displayed. Recognition and drawing display of characters, figures, etc. are performed. In this case, the left edge coordinate Xmin, the right edge coordinate Xmax,
Output voltage values from the touch panel corresponding to the lower edge coordinate Ymin and the upper edge coordinate Ymax are set as reference data, and the ratio of the output voltage value at the time of touch input between the respective reference data is calculated. Then, the XY coordinates on the display screen are obtained.

[0004]

However, in such a touch panel input device, when the applied voltage to the touch panel is lowered due to exhaustion of the battery power source or the electric characteristics of the touch panel itself are changed with time, the touch panel input device may be changed. Despite touching the same position, the output voltage value will change to a different value, so X on the display screen converted based on this output voltage value.
The Y coordinate may deviate from the actual touch position.

In this case, an adjacent key different from the key actually touched is input, or handwritten drawing is displayed at a position different from the actual touched position. Therefore, in the conventional touch panel input device, as described above, when the shift between the touch position by the user and the converted XY coordinates on the display screen is recognized, the user resets the reference data. There is a problem that (calibration adjustment) must be performed.

The present invention has been made in view of the above problems,
An object of the present invention is to provide a touch panel input device capable of preventing a positional deviation from a display screen position with respect to a touch input position without requiring the user to perform calibration adjustment.

[0007]

That is, a first touch panel input device according to the present invention includes a display section, a touch panel that covers the display section, and the touch panel for a predetermined display pattern displayed on the display section. Detecting means for detecting a change in the output value from the touch panel when a touch input is performed by the touch panel, and the touch panel based on the output change value at the touch input for the predetermined display pattern detected by the detecting means. And an adjusting means for adjusting the position of the display unit.

A second touch panel input device according to the present invention is the same as the first touch panel input device, further comprising storage means for storing an output value from the touch panel, and detecting means for the storage means. It is configured as means for calculating the difference between the output value at the time of the previous touch input of the predetermined display pattern and the output value at the time of the touch input of the current predetermined display pattern stored in the means, and detecting the output change.

A third touch panel input device according to the present invention is the first touch panel input device according to the first touch panel input device, wherein the adjusting means uses reference data for calculating display coordinates according to output values from the touch panel. It is configured as a means for resetting. A fourth touch panel input device according to the present invention is the touch panel input device, wherein the predetermined display pattern is configured as an icon.

[0010]

That is, in the first touch panel input device, when a change in the output value from the touch panel is detected when a touch input is performed on the predetermined display pattern displayed on the display unit by the touch panel. Since the position adjustment of the touch panel and the display unit is performed based on the output change value, the calibration adjustment is performed when the touch input operation is performed on the predetermined display pattern.

In the second touch panel input device, in the first touch panel input device, when touch input is performed on the predetermined display pattern displayed on the display unit by the touch panel, the touch panel is touched. Output values are sequentially stored in the storage means, and the difference between the output values at the time of the previous and present predetermined display pattern touch inputs stored in the storage means is calculated and the output change is detected. The position adjustment of the touch panel and the display unit is performed based on the value.

Further, in the third touch panel input device, in the first touch panel input device, reference data for calculating display coordinates according to an output value from the touch panel is the predetermined display pattern touch input. The value is reset based on the output change value at that time, and the alignment adjustment between the touch panel and the display unit is performed.

Further, in the fourth touch panel input device, when a change in the output value from the touch panel is detected each time a predetermined icon displayed on the display unit is touch-input, the output is output. The alignment adjustment between the touch panel and the display unit is performed based on the change value.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an electronic circuit of an electronic notebook equipped with a touch panel input device.

This electronic notebook is a central processing unit (CPU).
11 is provided. The CPU 11 activates a system program stored in advance in the ROM 15 in response to a touch position detection signal supplied from the touch panel 12 via the panel drive unit 13 and the A / D conversion unit 14, and controls the operation of each circuit unit. This is executed by the CPU 11,
In addition to the A / D converter 14 and the ROM 15, the display driver 1
A liquid crystal display (LCD) 17 is connected via 6, and a RAM 18, a touch position reference data register 19,
The touch position data history register 20 is connected.

The touch panel 12 has a touch input area corresponding to the display screen area of the liquid crystal display unit 17, and is arranged so as to be overlaid on the display screen. The power supply voltage Vin of the touch panel 1 is applied via the panel drive unit 13.
The touch position detection voltage Vout output from 2 is converted into a digital value by the A / D conversion unit 14 via the panel drive unit 13, and is supplied to the CPU 11 as touch position detection data.

In this case, the CPU 11 converts the digital data, which is supplied from the A / D conversion unit 14 and corresponds to the touch position on the touch panel 12, into the XY coordinates of the liquid crystal display unit 17, whereby the CPU 11 can operate. , The touch position on the display screen is determined.

Here, the operation mode of the electronic notebook is switched by touching a menu screen made up of a plurality of icons displayed on the liquid crystal display unit 17.
FIG. 2 is a diagram showing a display state of a menu screen in the electronic notebook.

In this embodiment, the operation mode of the electronic notebook is designated by selectively touching eight icons. For example, the telephone mode icon 21a, the clock mode icon 21b, the calculation mode icon 21c, etc. Each icon pattern for displaying this menu screen is stored in the ROM 15 in advance,
When the system power is turned on, it is read by the CPU 11 and displayed on the liquid crystal display unit 17.

In the RAM 18, various notebook data such as address data and schedule data input and displayed on the liquid crystal display unit 17 is registered by handwriting on the touch panel 12 or touch key input operation.
The registration data in the AM 18 is read according to each corresponding data search mode designated by the icon selection operation on the menu screen, and is displayed on the liquid crystal display unit 17.

In the touch position reference data register 19,
The lower edge coordinate Xmin and the upper edge coordinate Xma of the liquid crystal display unit 17
Digital data of each touch position detection voltage Vout when touch input is performed on the touch panel 12 corresponding to each of x, left edge coordinate Ymin, and right edge coordinate Ymax is set and stored as reference data for coordinate conversion. When the touch panel 12 is touch-operated corresponding to a desired position on the display screen of the liquid crystal display unit 17, the respective reference data Xmin, Xmax, Ymin, Ymax of the digital data corresponding to the touch position detection voltage Vout. The XY coordinates on the display screen are obtained by calculating the ratio in (1), and the CPU 11 determines which icon in the menu screen is touch-operated, for example.

In the touch position data history register 20,
When the touch panel 12 is touch-operated corresponding to the clock mode icon 21b in the menu screen (see FIG. 2) displayed on the liquid crystal display unit 17, it is supplied from the panel drive unit 13 through the A / D conversion unit 14. Digital data of the touch position detection voltage Vout to be stored is sequentially shifted and stored 10 times each time the touch operation is performed, and the touch position data S1 to S10 corresponding to 10 times corresponding to the clock mode icon 21b are stored. When obtained, the average touch position data SAV is calculated and stored together.

In this case, the average touch position data SAV
Is the latest average touch position data S for 10 times each time new touch position data S1 is stored and shift processed.
It is calculated as AV and updated and stored.

The CPU 11 is provided with a flag register F which is set in the touch position data history register 20 in a state where the touch position data S1 to S10 for 10 times are obtained.

FIG. 3 is a diagram showing an icon pattern of a clock mode icon displayed as a menu screen of the electronic notebook, and FIG. 3A is a diagram showing a general clock mode icon pattern 21b. FIG. 9B is a diagram showing a clock mode icon pattern 22 which is particularly effective in this embodiment.

That is, in the clock mode icon pattern 22 shown in FIG. 3B, the touch position on the touch panel 12 is necessarily concentrated in a stable manner corresponding to the central dot pattern 22a of the icon pattern 22. The difference between the values of the touch position data S1 to S10 stored in the touch position data history register 20 is almost purely the fluctuation of the power supply voltage Vin supplied from the battery power source E to the touch panel 12 or the touch panel 12 itself. If the change range of the touch position data S1 to S10 is large,
Even if the same position is touched on the touch panel 12,
Each reference data Xmin, Xmax, Ymin, Ymax
The XY coordinates on the display screen converted based on the above are shifted.

In this case, when the variation width of the average touch position data SAV becomes a predetermined value C or more, the respective reference data Xmin, Xmax, Ymin, Ymax in the touch position reference data register 19 is reset based on the variation width. Then, the positional deviation between the actual touch position and the converted coordinate on the display screen is corrected.

Next, the operation of the electronic notebook equipped with the touch panel input device having the above configuration will be described. FIG. 4 is a flowchart showing a touch panel input process in an electronic notebook equipped with the touch panel input device.

That is, when the user touch-operates the touch panel 12, the panel drive unit 13 and the A / D are operated.
Touch position data corresponding to the touch position detection voltage Vout is supplied to the CPU 11 via the conversion unit 14,
When it is determined that there is a touch input, the reference data Xmin, Xmax, Ymin, Ym set in the touch position data and the touch position reference data register 19 are set.
Based on ax, XY coordinates corresponding to the liquid crystal display unit 17 are calculated to recognize the touch position, and menu selection input processing, handwriting input drawing processing, touch key input processing, or the like is executed (step). A1 → A
2, A3).

When the processing for this input is completed, it is next determined whether the processing is for touching a predetermined icon, in this case, the clock mode icon (step A4).

When it is determined that the touch operation has been performed on the clock mode icon 21b, it is determined whether or not "1" is set in the flag register F in the CPU 11, that is, the past ten times for the clock mode icon 21b. It is determined whether or not the touch position data S1 to S10 corresponding to each touch position detection voltage Vout corresponding to the touch input is stored in the touch position data history register 20 (steps A4 → A5).

If it is judged "NO" in this step A5, that is, if the touch input for the clock mode icon 21b has not been made 10 times, the touch position data for the current clock mode icon 21b is the touch position data. The history register 20 is shift-input as S1 and stored (step A5 → A6).

The steps A1 to A6 are repeatedly executed until the touch position data S1 to S10 for 10 times with respect to the clock mode icon 21b are sequentially shifted and stored in the touch position data history register 20. Then, touch position data S1 to S10 for 10 times
Is stored, "1" is set in the flag register F in the CPU 11, and the average touch position data SAV is calculated and stored (step A6).

Thus, the touch position data history register 20 stores touch position data S1 to S10 for the past ten times.
And the average touch position data SAV are stored,
When it is determined that the clock mode icon 21b is touched again by the user's menu selection input process,
Since it is determined that "1" is set in the flag register F in the CPU 11, the touch position data for the current clock mode icon 21b is further shift-input as S1 into the touch position data history register 20, and The average touch position data S of the touch position data S1 to S10 for 10 times up to this time is calculated (steps A1 to A5 → A7, A9).

Then, the difference between the average touch position data S for 10 times up to this time and the average touch position data SAV for the past 10 times stored in the touch position data history register 20 for the clock mode icon 21b is a predetermined value C. It is determined whether or not the above. That is, the change width of each touch position detection voltage Vout when the same position on the touch panel 12 is touch-operated is caused by, for example, a change in the power supply voltage Vin supplied to the touch panel 12 or a change in the electrical characteristics of the touch panel 12 itself. Then, it is determined whether or not the actual touch position and the converted coordinate on the display screen have become large enough to be displaced (step A10).

In step A10, "YES",
That is, the difference between the average touch position data S for 10 times up to this time and the average touch position data SAV for the past 10 times with respect to the clock mode icon 21b becomes the predetermined value C or more, and when the same position on the touch panel 12 is touch-operated. When it is determined that the change width of each touch position detection voltage Vout has become large enough to cause a deviation between the actual touch position and the converted coordinate on the display screen, the average touch position data S for 10 times until this time is the touch position. Data history register 2
After being updated as the average touch position data SAV in 0, the touch position reference data register 1 is based on the difference (S-SAV) between the average touch position data in the past and this time.
The reference data Xmin, Xmax, set to 9
Ymin and Ymax are reset (step A10 →
A11, A12).

Then, each reference data Xmin, Xmax, Ymi in the touch position reference data register 19 is obtained.
n and Ymax are corrected according to, for example, the width of decrease in the applied voltage Vin to the touch panel 12 due to the consumption of the battery power source E, or the width of change in the touch position detection voltage Vout due to the change in the electrical characteristics of the touch panel 12 itself. The position shift between the actual touch position on the touch panel 12 and the converted coordinate (X, Y) on the display screen of the liquid crystal display unit 17 is prevented in advance.

On the other hand, if "NO" is determined in the step A10, the resetting process is not executed. Therefore, according to the electronic notebook equipped with the touch panel input device having the above-described configuration, when the touch input by the touch panel 12 is performed on the clock mode icon 21b displayed on the liquid crystal display unit 21, the touch from the touch panel 12 is performed. Touch position data corresponding to the position detection voltage Vout via the A / D converter 14 is shift-input as S1 to S10 to the touch position data history register 20 each time the touch operation is performed and stored, and an average of the past 10 times. Touch position data SAV and average touch position data S of 10 times so far
When a difference of a predetermined value C or more is detected, the reference data X set in the touch position reference data register 19 is set based on the difference (S-SAV) of the touch position data.
Since min, Xmax, Ymin, and Ymax are reset, alignment adjustment (calibration adjustment) between the touch panel 12 and the liquid crystal display unit 17 is performed every time the clock mode icon 21b is touched. , The actual touch position on the touch panel 12 and the converted coordinates (X,
It is possible to prevent the positional deviation from Y).

[0039]

As described above, according to the first touch panel input device of the present invention, when the touch input is performed on the predetermined display pattern displayed on the display unit by the touch panel, When a change in the output value is detected, the adjustment of the alignment between the touch panel and the display unit is performed based on the output change value, so that the calibration adjustment is performed during the touch input operation with respect to the predetermined display pattern.

Further, according to the second touch panel input device of the present invention, in the first touch panel input device, when touch input is performed by the touch panel with respect to a predetermined display pattern displayed on the display unit. The output values from the touch panel are sequentially stored in the storage means, and the difference between the output values at the time of the predetermined display pattern touch input of the previous time and the current time stored in the storage means is calculated to detect the output change. The position adjustment of the touch panel and the display unit is performed based on the output change value.

Further, according to the third touch panel input device of the present invention, in the first touch panel input device, the reference data when calculating the display coordinates according to the output value from the touch panel is the predetermined display. The setting is reset based on the output change value at the time of the pattern touch input, and the alignment adjustment between the touch panel and the display unit is performed.

Further, according to the fourth touch panel input device of the present invention, when a change in the output value from the touch panel is detected every time a touch input is performed on a predetermined icon displayed on the display unit. The position adjustment of the touch panel and the display unit is performed based on the output change value. Therefore, it is possible to prevent the positional deviation from the display screen position with respect to the touch input position without requiring the user to perform the calibration adjustment.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an electronic circuit of an electronic notebook equipped with a touch panel input device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a display state of a menu screen in the electronic notebook.

3A and 3B are diagrams showing an icon pattern of a clock mode icon displayed as a menu screen of the electronic notebook, FIG. 3A showing a general clock mode icon pattern, and FIG. The figure which shows the icon pattern for timepiece modes especially effective in the Example of this invention.

FIG. 4 is a flowchart showing a touch panel input process in an electronic notebook equipped with the touch panel input device.

[Explanation of symbols]

11 ... Central processing unit (CPU), 12 ... Touch panel,
13 ... Panel drive unit, 14 ... A / D conversion unit, 15 ... RO
M, 16 ... Display drive unit, 17 ... Liquid crystal display unit, 18 ... RA
M, 19 ... Touch position reference data register, 20 ... Touch position data history register, E ... Battery power supply, Vin
... Touch panel applied voltage, Vout ... Touch position detection voltage, F ... Flag register.

Claims (4)

[Claims] 1. A display unit, a touch panel that covers the display unit, and a change in an output value from the touch panel when a touch input is performed on the predetermined display pattern displayed on the display unit by the touch panel. A detecting unit for detecting the position, and an adjusting unit for adjusting the position of the touch panel and the display unit based on the output change value at the time of touch input with respect to the predetermined display pattern detected by the detecting unit. Characteristic touch panel input device. 2. A storage means for storing the output value from the touch panel is further provided, and the detection means stores the output value at the time of the previous predetermined display pattern touch input stored in the storage means and the current predetermined display. The touch panel input device according to claim 1, wherein the touch panel input device is means for calculating a difference from an output value at the time of pattern touch input and detecting an output change. 3. The touch panel input device according to claim 1, wherein the adjusting unit is a unit that resets reference data when calculating display coordinates according to an output value from the touch panel. 4. The display pattern according to claim 1, wherein the predetermined display pattern is an icon.
The touch panel input device according to claim 1.