JPH08190453A - Analog touch panel device - Google Patents

Abstract

PURPOSE: To calculate each operation position even when two places on an analog touch panel are pressed at the same time. CONSTITUTION: The analog touch panel 1 is constituted by placing an X-axial resistant thin film 11 which is provided with X-axial electrodes X1 and X2 on both sides and a Y-axial resistant thin film 13 which is provided with Y-axial electrodes Y1 and Y2 on both sides opposite each other across a specific gap and bringing both the resistant thin films 11 and 13 into contact with each other according to a depression position. First to forth switches 3-6 connected between the respective electrodes X1 and X3, and Y1 and Y2, and a DC power source 2 are placed in operation alternately and the potentials of the electrodes X1 and X2, and Y1 and Y2 are inputted to an arithmetic unit 7. The depression position on the analog touch panel 1 is calculated from those potentials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of an analog touch panel device using a transparent resistance thin film, and more particularly to an analog touch panel device capable of calculating each operation position even when two positions are simultaneously pressed.

[0002]

2. Description of the Related Art A conventional technique of this type has a structure shown in FIG. That is, the X-axis resistance thin film 11 having the X-axis electrodes X1 and X2 on both sides and the Y-axis resistance thin film 13 having the Y-axis electrodes Y1 and Y2 on both sides are opposed to each other with a predetermined gap, The analog touch panel 1 is designed so that the resistance thin films 11 and 13 are brought into contact with each other according to the above, and the first and second switches 3 and 3 are provided between the X-axis electrodes X1 and X2 and the DC power supply 2.
4 is connected, and the third and fourth switches 5 and 6 are connected between the Y-axis electrodes Y1 and Y2 and the DC power source 2, and each switch 3,
4, 5, 6 and the positive electrode X of the analog touch panel 1
The calculation unit 7 was connected to 1, and Y1, and the display device 8 was further connected to the calculation unit 7. The arithmetic unit 7 then closes the first and second switches 3 and 4 and opens the third and fourth switches 5 and 6 to obtain the potential value V of the Y-axis electrode Y1.
The push position on the X coordinate is calculated from Y1, and the potential value VX1 of the X-axis electrode X1 when the first and second switches 3 and 4 are opened and the third and fourth switches 5 and 6 are closed on the Y coordinate. I was programming to calculate the push position. A similar technique according to the present invention is disclosed in, for example, Japanese Utility Model Laid-Open No. 1-144937 and Japanese Utility Model Laid-Open No. 2-24429.

[0003]

However, in the above-mentioned conventional technique, it is impossible to calculate each operation position when two positions are simultaneously pressed.

[0004]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and an object thereof is to provide an analog touch panel device capable of calculating each operation position even when two positions are simultaneously pressed. It is what

In order to achieve the above object, the present invention faces an X-axis resistance thin film having X-axis electrodes on both sides and a Y-axis resistance thin film having Y-axis electrodes on both sides with a predetermined gap therebetween. In addition, an analog touch panel in which both resistive thin films are brought into contact with each other depending on the pressing position, first and second switches connected between the X-axis electrode and the DC power source, and between the Y-axis electrode and the DC power source An arithmetic unit connected to each switch for controlling opening / closing of each of the third and fourth switches and each power source of the analog touch panel, wherein the first and second switches are closed and the third and fourth switches are closed. The push position on the X coordinate is calculated from each potential value of the Y-axis electrode when the 4th switch is opened, and the 1st and 2nd switches are opened and the 3rd and 4th switches are opened.
An analog touch panel device is provided, which comprises: the arithmetic unit for calculating the push position on the Y coordinate from each potential value of the X-axis electrode when the switch is closed.

In the above invention, the analog touch panel is transparent and flexible and has an X-axis resistance thin film deposited thereon, and a substrate having both transparency and hardness and a Y-axis resistance thin film deposited thereon. And X-axis electrodes provided on both sides of the X-axis resistance thin film and Y-axis electrodes provided on both sides of the Y-axis resistance thin film, and the two resistance thin films are opposed to each other with a predetermined gap, and An analog touch panel, wherein the X-axis electrode and the Y-axis electrode are arranged so as to have a substantially orthogonal positional relationship, and both resistive thin films are brought into contact with each other in accordance with the pushing position where the film is pushed. Provide a device.

Further, in the above invention, the arithmetic unit is configured to detect the first electric potential value of the X-axis electrode when the first position is pressed and the first electric potential value.
The second position on the Y coordinate is calculated from both the electric potential value of the X-axis electrode and the electric potential value of the X-axis electrode when the second position is pressed simultaneously, and the second position of the Y-axis electrode when the first position is pressed. Potential value and first
An analog touch panel device having a function of calculating a second position on the X coordinate from both electric positions of the Y-axis electrode and the electric position when the second position and the second position are simultaneously pressed. To do.

[0008]

Embodiments of the present invention will be described with reference to FIGS. In the drawings, 1 is an analog touch panel, 2 is a DC power source, 3 is a first switch, 4 is a second switch, 5 is a third switch, 6 is a fourth switch, 7 is an arithmetic unit, and 8 is a display device. Each of these configurations will be described below.

First, the analog touch panel 1 is shown in FIG.
As shown in (a) and (b), an X-axis resistive thin film 11 having X-axis electrodes X1 and X2 on both sides, and Y-axis electrodes Y1 and Y2 on both sides.
The Y-axis resistance thin film 13 provided with is made to face each other with a predetermined gap, and the resistance thin films 11 and 13 are configured to come into contact with each other depending on the pressing position. The X-axis resistance thin film 11 is deposited on a film 12 having translucency and flexibility and made of, for example, a polyester material, and the Y-axis resistance thin film 13 is coated on a substrate 14 having translucency and hardness made of, for example, a glass material. I'm wearing it.

The film 12 and the substrate 14 are separated from each other by an outer peripheral spacer 15 provided around the film 12, and a dot spacer 16 is provided between the opposed X-axis resistance thin film 11 and Y-axis resistance thin film 13. . Furthermore, the X-axis electrode X1,
As shown in FIG. 4A, the X2 and the Y-axis electrodes Y1 and Y2 are arranged so as to have a substantially orthogonal positional relationship with each other. I am guiding to 18. Reference numeral 19 is a connecting portion for electrically connecting the Y-axis electrodes Y1 and Y2 on the substrate 14 side to the conductive pattern 17. FIG. 2 schematically shows the analog touch panel 1.

A first switch 3 is provided between the one X-axis electrode X1 and the positive electrode of the DC power supply 2, and a second switch 4 is provided between the other X-axis electrode X2 and the negative electrode of the DC power supply 2. Connected. Similarly, one Y-axis electrode Y1 and DC power supply 2
The third switch 5 between the positive electrode and the other Y-axis electrode Y
The fourth switch 6 is connected between the negative electrode 2 and the negative electrode of the DC power supply 2.

The arithmetic unit 7 is composed of a CPU (central processing unit), and each switch 3, 4, 5, 6 is provided.
And each electrode X1, X2, Y of the analog touch panel 1
1 and Y2. And the output terminals X01, X0
2, Y01, Y02 to derive signals from each switch 3,
The opening / closing of 4, 5, 6 is controlled, and the input terminals X11, X12, Y11, Y are synchronized with the timing of the opening / closing control.
It has a function of introducing a signal from 12 and calculating the pushing position of the analog touch panel 1 based on the input signal.

More specifically, the arithmetic unit 7 has the potential values VY1 and VY of the Y-axis electrodes Y1 and Y2 when the first and second switches 3 and 4 are closed and the third and fourth switches 5 and 6 are opened.
The push position on the X coordinate is calculated from 2, and the potential values VX1 and VX2 of the X-axis electrodes X1 and X2 when the first and second switches 3 and 4 are opened and the third and fourth switches 5 and 6 are closed. To program the function to calculate the push position on the Y coordinate. More specifically, the arithmetic unit 7 controls the potential value VX of the X-axis electrodes X1 and X2 when the first position a is pressed.
1a, VX2a and the potential values VX1a of the X-axis electrodes X1, X2 when the first position a and the second position b are simultaneously pressed.
b and VX2ab, the second position b on the Y coordinate is calculated from both potential values, and the Y-axis electrode Y when the first position a is pressed
Y-axis electrodes Y1 and Y when the potential values VY1a and VY2a of 1 and Y2 and the first position a and the second position b are simultaneously pressed.
X from the two potential values VY1ab and VY2ab
The function of calculating the second position b on the coordinates is programmed.

Here, an arithmetic expression for calculating the second position b on the Y coordinate and the X coordinate will be illustrated by using an equivalent circuit diagram shown in FIG. First, as shown in part (c) of FIG.
When the potential values VX1a and VX2a of the X-axis electrodes X1 and X2 when the first position a is pressed and the first position a and the second position b are simultaneously pressed as shown in part (d) of FIG. X
An arithmetic expression for calculating the second position b on the Y coordinate is calculated from both electric potential values VX1ab and VX2ab of the shaft electrodes X1 and X2.

When reading the respective potential values VX1 and VX2 from the input terminals X11 and X12 of the arithmetic unit 7, the first and second switches 3 and 4 are open. Therefore, the following relational expressions hold for the respective potential values VX1a and VX2a when the first position a is pressed.

VX1a = VX2a (1)

The potential value VX1a of the X-axis electrodes X1 and X2 when the first position a and the second position b are simultaneously pressed.
The average value A of b and VX2ab can be expressed by the following equation.

A = (VX1ab + VX2ab) / 2 (2)

The difference value B between the average value A and the potential value VX1a when the first position a is pushed can be expressed by the following equation calculated based on the equations (1) and (2). .

B = VX1a-{(VX1ab + VX2ab) / 2} (3)

In addition, the potential value VX1a of the equation (3) is changed to the potential value VX.
It is clear from the equation (1) that the same thing can be obtained even if it is replaced with X2a. Here, the following relational expressions are established for the respective potential values VX1b and VX2b when the second position b is pressed, as in the expression (1).

VX1b = VX2b (4)

Therefore, the difference value C between the average value A and the potential value VX2b when the second position b is pushed can be expressed by the following equation calculated based on the equations (2) and (4). .

C = {(VX1ab + VX2ab) / 2} -VX2b (5)

The potential value VX2b in the equation (3) is set to the potential value VX.
It is clear from the equation (4) that the same thing can be obtained even if it is replaced with X1b. The average value A is a value corresponding to the midpoint between the first position a and the second position b, and the difference values B and C are the same value. That is,

B = C (6)

Therefore, from equations (3), (5) and (6)

VX1a-{(VX1ab + VX2ab) / 2} = {(VX1ab + VX2ab) / 2} -VX2b VX2b = [{(VX1ab + VX2ab) / 2} × 2] -VX1a = VX1ab + VX2ab -... 7)

Can be calculated. Therefore, the second position b on the Y coordinate is calculated by writing the respective potential values VX1a, VX1ab, VX2ab read from the input axes X11, X12 into the equation (7).

The potential values input from the input terminals X11 and X12 are the potential values VX1a and VX2 when one position is pressed.
a or a potential value VX1 when two points are simultaneously pressed
ab and VX2ab are determined by input terminals X11,
It is performed depending on whether or not X12 has the same potential. For example, when both input terminals X11 and X12 have the same potential, this is the case where one position is pressed, and the input potential value is the potential value VX1a,
Treated as VX2a. Further, when both input terminals X11 and X12 are not at the same potential, it means that two locations are simultaneously pressed, and the input potential value is treated as potential values VX1ab and VX2ab.

Next, as shown in part (a) of FIG. 5, the potential value VY1 of the Y-axis electrodes Y1, Y2 when the first position a is pressed.
a, VY2a and the Y-axis electrode Y when the first position a and the second position b are simultaneously pressed as shown in FIG. 5B.
A calculation formula for calculating the second position b on the X coordinate is calculated in the same manner as above from both potential values VY1ab and VY2ab of 1 and Y2.

VY1a = VY2a (8) D = (VY1ab + VY2ab) / 2 (9) ) E = VY1a-{(VY1ab + VY2ab) / 2} ... (10) VY1b = VY2b ... (11) F = {(VY1ab + VY2ab) / 2} -VY2b ... (12) E = F ... (13) VY1a-{(VY1ab + VY2ab) / 2} = {(VY1ab + VY2ab) / 2} -VY2b VY2b = [{(VY1ab + VY2ab) / 2} × 2] -VY1a = VY1ab + VY2ab-VY1a ... (14)

Can be calculated. Symbols D, E and F shown in the above equations (9), (10) and (12) are the average values of the potential values VY1ab and VY2ab, the difference value between the average value D and the potential value VY1a, and the average value D and the potential, respectively. Value V
The difference value from Y2b is shown. Therefore, at the second position b on the X coordinate, the respective potential values VY1a, VY1ab, VY2ab read from the input terminals Y11, Y12 are expressed by the formula (1
Calculation is performed by writing in 4).

The potential values input from the input terminals Y11 and Y12 are the potential values VY1a and VY2 when one position is pressed.
a or a potential value VY1 when two points are simultaneously pressed
The determination as to whether it is ab or VY2ab is made based on whether or not both input terminals Y11 and Y12 have the same potential as described above.

The second position b in the case of simultaneous pressing can be obtained using the above-described arithmetic expression. Although there are various procedures for processing using the arithmetic expressions (7) and (14), a flowchart is illustrated in FIG. 3 for reference. The above arithmetic processing can be executed by steps 100 to 116 shown in this flowchart. The display device 8 shown in FIG. 1 is an audiovisual device such as a vehicle-mounted navigation device. The analog touch panel 1 is
A display screen (not shown) of the display device 8 is arranged so as to cover it, and is used for touching the display contents displayed on the display screen.

Next, the operation will be described with reference to the time chart shown in part (b) of FIG. The first and second switches 3 and 4 and the third and fourth switches 5 and 6 are connected to the output terminal X of the arithmetic unit 7.
01, X02, Y01, and Y02 receive signals derived at a constant cycle to open and close, and the X-axis resistance thin film 11 and the Y-axis resistance thin film 13 of the analog touch panel 1 are alternately energized.

For example, at times t1 to t3 and t5 to t7, the output terminals X01 and Y02 of the arithmetic unit 7 are at low potential,
The output terminals X02 and Y01 are at high potential. Therefore, the third
The fourth switches 5 and 6 are closed to energize the Y-axis resistive thin film 13 of the analog touch panel 1, and the first and second switches 3 and 4 are opened. And time t2-t3, t6-
At t7, the arithmetic unit 7 receives the input terminals X11 and X12.
The gate of is opened and the potential values VX1 and VX2 are read into the arithmetic unit 7. Then, the contact position of the Y-axis resistance thin film 13 with respect to the X-axis resistance thin film 11, that is, the first position a and the second position b on the Y coordinate are calculated based on the equation (7). In this case, each position can be calculated even if the first position a and the second position b are simultaneously pressed, as described above.

At times t3 to t5 and t7 to t9, the output terminals X01 and Y02 of the arithmetic unit 7 are at high potential,
The output terminals X02 and Y01 have a low potential. Therefore, the first
The second switches 3 and 4 are closed to energize the X-axis resistive thin film 11 of the analog touch panel 1, and the third and fourth switches 5 and 6 are opened. Then, time t4 to t5, t8 to
At t9, the arithmetic unit 7 receives the input terminals Y11 and Y12.
The gate of is opened and the potential values VY1 and VY2 are read into the arithmetic unit 7. Then, the contact position of the X-axis resistance thin film 11 with respect to the Y-axis resistance thin film 13, that is, the first position a or the second position b on the X coordinate is calculated based on the equation (14).
Also in this case, similarly to the above, each position can be calculated by simultaneously pressing the first position a and the second position b.

[0039]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure and operation, it is possible to calculate and specify each operation position even if a plurality of positions on the analog touch panel are simultaneously pressed. In particular, the operation position when pushing one position from the potential value of both electrodes by simply making a simple improvement by connecting both the electrodes provided on both sides of the resistive thin film to the arithmetic unit in comparison with the conventional one. Of course, it is possible to calculate the operation position when a plurality of positions are simultaneously pressed. Moreover, since the X-axis electrode and the Y-axis electrode are substantially orthogonal to each other,
The operation position can be detected as the operation position on the XY coordinates, that is, any operation position on the plane can be detected.

[Brief description of drawings]

FIG. 1 is a view showing a preferred embodiment of the present invention,
(A) is an electric circuit diagram, (b) is a time chart.

FIG. 2 is a schematic diagram of the analog touch panel shown in FIG.

FIG. 3 is a flowchart illustrating a program set in the arithmetic unit shown in FIG.

4A and 4B are drawings of the analog touch panel shown in FIG. 1, in which FIG. 4A is a top view and FIG.
It is sectional drawing of a line direction.

FIG. 5 is an equivalent circuit diagram for consideration in calculating an arithmetic expression according to the present invention.

FIG. 6 is an electrical circuit diagram showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Analog touch panel 2 DC power supply 3 1st switch 4 2nd switch 5 3rd switch 6 4th switch 7 Arithmetic unit 8 Display device

Claims (3)

[Claims] 1. An X-axis resistance thin film (11) having X-axis electrodes (X1, X2) on both sides, and Y-axis electrodes (Y1, Y) on both sides.
The Y-axis resistance thin film (13) provided with 2) is made to face each other with a predetermined gap, and both resistance thin films (1
An analog touch panel (1) to be contacted with the first and second switches (3, 4) connected between the X-axis electrodes (X1, X2) and a DC power supply (2); To control the opening and closing of the third and fourth switches (5, 6) connected between the Y-axis electrodes (Y1, Y2) and the DC power supply (2) and the switches (3, 4, 5, 6). It is connected to each switch (3, 4, 5, 6) and each power source (X1, X2, Y1,
A calculation unit (7) connected to Y2),
Push position on the X coordinate from each potential value (VY1, VY2) of the Y-axis electrodes (Y1, Y2) when the second switch (3, 4) is closed and the third and fourth switches (5, 6) are opened. To open the first and second switches (3, 4) and
X-axis electrode (X
1, X2), and the arithmetic unit (7) for calculating the push position on the Y coordinate from each potential value (VX1, VX2) of the analog touch panel device. 2. The invention according to claim 1, wherein the analog touch panel (1) has a light-transmitting property and flexibility and an X-axis resistance thin film (1).
A film (12) coated with (1), and a Y-axis resistance thin film (13) which has translucency and hardness.
And a substrate (14) on which X-axis electrodes (X) are provided on both sides of the X-axis resistance thin film (11).
1, X2) and Y-axis electrodes (Y) provided on both sides of the Y-axis resistance thin film (13).
1, Y2), the resistance thin films (11, 13) face each other with a predetermined gap, and the X-axis electrodes (X1, X2) and the Y-axis electrodes (Y1, Y2) are substantially An analog touch panel device, wherein the resistance thin films (11, 13) are arranged so as to have an orthogonal positional relationship, and the resistive thin films (11, 13) are brought into contact with each other in accordance with the pushed position where the film (12) is pushed. 3. The invention according to claim 1 or 2, wherein the arithmetic unit (7) pushes the first position (a) to the X-axis electrodes (X1, X).
2) potential values (VX1a, VX2a) and potential values (VX1ab, VX2a) of the X-axis electrodes (X1, X2) when the first position (a) and the second position (b) are simultaneously pressed.
The second position (b) on the Y coordinate is calculated from both potential values of (b) and b) and the Y-axis electrodes (Y1, Y) when the first position (a) is pressed.
2) potential values (VY1a, VY2a) and electric positions (VY1ab, VY2a) of the Y-axis electrodes (Y1, Y2) when the first position (a) and the second position (b) are simultaneously pressed.
An analog touch panel device having a function of calculating a second position (b) on the X coordinate from both potential values of (b) and b).