JPH07239730A - Touch screen - Google Patents

Abstract

PURPOSE:To obtain the same connection effect even when the connection position of a connector is set to an opposite side by arranging electrodes, which output lateral and longitudinal coordinate data of the connector of a connection part, line-symmetrically at the width-directional centers of the electrodes. CONSTITUTION:A coordinate data detection part 2 is composed roughly of a coordinate data detection board 3 and the connection part 4, and the electrodes 4a-4d at the connection part 4 are connected to transparent resistance film electrodes 3a-3d of the coordinate data detection board 3 respectively, and the transparent resistance film electrodes 3a and 3d are connected to the transparent resistance film 3e, the transparent resistance film electrodes 3b and 3c are connected to the transparent resistance film 3f, and the transparent resistance films 3e and 3f are arranged in parallel while a slight gap is left by using a spacer. Further, the part where the two transparent resistance films 3e and 3f overlap with each other is a coordinate data detection area 3g. And, the electrodes, i.e., the upper electrode 4a and lower electrode 4d, and left electrode 4b and right electrode 4c are arranged line-symmetrically at the connection part connector center positions.

Description

Detailed Description of the Invention

[0001]

[Industrial application] Connection of a touch screen provided with a coordinate data detection board, a coordinate data digitization section, and a connection section for outputting the coordinate data detected by this coordinate data detection board to the coordinate data digitization section The configuration of the electrodes of the connector of the part.

[0002]

2. Description of the Related Art FIG. 5 is a plan view of an example of a coordinate data detection unit 12 of a resistance pressure type touch screen using a conventional technique. The coordinate data detection unit 12 is roughly divided into a coordinate data detection board 13 and a connection unit 14. The electrodes 14a to 14d in the connection portion 14 are connected to the transparent resistance film electrodes 13a to 13d of the coordinate data detection board 13, respectively, and the transparent resistance film electrodes 13a and 13b are connected to the transparent resistance film 13e and the transparent resistance film electrodes 13c and 13d. Is connected to the transparent resistance film 13f, and the transparent resistance film 13e,
A spacer 13f is arranged in parallel with a slight gap. A portion where the two transparent resistance films 13e and 13f overlap each other becomes a coordinate data detection area 13g.

FIGS. 6A and 6B are plan views of a conventional touch screen 11 incorporating the coordinate data detection unit 12 of FIG. In FIG. 6A, the coordinate data detection board 1 is arranged so that the connecting portion 14 is located on the left side.
3, a display unit 6 is disposed below the display unit 3, a coordinate data digitization unit 5 is disposed on the left side of the display unit 6, and the coordinate data digitization unit 5 has an A / D converter 5a incorporated therein to digitize the coordinate data. The partial connector 5b is provided and is connected to the connecting portion 14. 6B, the coordinate data detection board 13 of FIG. 6A is rotated by 180 degrees, and the connection portion 14 is arranged so as to come to the right side of the coordinate data detection board 13, and the coordinate data digitization portion 5 is also included. The moved arrangement is shown. The connection cable 5c is bent to the right in FIG. 6A, but is bent to the left in FIG. 6B for connection.

Next, the coordinate data detection in FIG. 5 will be described. First, by pressing any one point in the coordinate data detection area 13g of the coordinate data detection board 13, one point of the two transparent resistance films 13e and 13f comes into contact with each other. At this time, in order to detect the coordinates in the lateral direction, the electrode 1 of the connecting portion 14 of FIG.
When a voltage is applied between 4a and 14b, a voltage is applied between the transparent resistance film electrodes 13a and 13b of the coordinate data detection board 13, and the transparent resistance film electrode 13c of the coordinate data detection board 13 is applied.
And 13d, the divided voltage representing the lateral position is output to the electrodes 14c and 14d. Similarly, for coordinate data in the vertical direction, if a voltage is applied between the electrodes 14c and 14d, the transparent resistance film electrodes 13c and 13d of the coordinate data detection board 13 will be described.
A voltage is applied between the electrodes 14a and 1 through the transparent resistance film electrodes 13a and 13b of the coordinate data detection board 13.
The divided voltage representing the lateral position is output to 4b. The outputted divided voltage is inputted to the A / D converter 5a from the coordinate data digitizing section connector 5b shown in FIG. 6A and digitized. At this time, since the electrodes are continuous for each transparent resistance film, the electrodes 14a, 14b, 14c of the connection portion 14,
14d is generally arranged as shown in FIG.

[0005]

However, in the above-described conventional configuration, the same coordinate data detection unit 12 is shared by a plurality of types of touch screens, and coordinate data detection is performed as shown in FIGS. 6 (a) and 6 (b). When the section 2 is rotated 180 degrees so that the electrode position is on the opposite side and the connector is reconnected, the coordinate detection electrodes for ordinate detection and abscissa detection differ from the arrangement of the electrodes. There is a problem that the coordinate data digitization unit cannot be shared. For example, consider a case where the position indicated by the point P1 in the coordinate data detection area 13g of FIG. 6A on the screen is pressed. When the horizontal width of the coordinate data detection area 13g is Lx, the vertical width is Ly, and the lower left end is P0, the horizontal direction P1x of the point P1 is set.
Is 1 / of the lateral width Lx from the left end of the coordinate data detection area 3g.
3, the vertical direction P1y is the coordinate data detection area 3
Assuming that the position is 1/3 of the vertical width Ly from the lower end of g, the applied voltage between the electrodes 14a and 14b applied in the horizontal direction is Vx volt, and the applied voltage between the electrodes 14c and 14d applied in the vertical direction is Vy volt. Then, the output voltages representing the coordinates are 1/3 × Vx volts in the horizontal direction and 1/3 × V in the vertical direction, respectively.
It becomes y volt. At this time, consider a case where the coordinate data detection unit 12 is half rotated as shown in FIG. 6B. Figure 6
A point P having the same coordinates as the point P1 pressed in FIG. 6A in FIG.
Assuming that the electrode 2 is pressed, the applied voltage between the electrodes 14a and 14b is Vx volt, and the applied voltage between the electrodes 14c and 14d is Vy volt, as shown in FIG. 6A. However, the position of P2 from P0 is (1-1 / 3) × Lx in the horizontal direction and (1-1 / 3) × Ly in the vertical direction.
Therefore, the output voltage in the horizontal direction is (1-1 / 3) × Vy
= 2/3 x Vx volt, the vertical output voltage is (1-1 /
3) × Vy = 2/3 Vy Volts. Since the coordinate value displayed on the display unit 6 is set so as to correspond to the output voltage, if the output voltage is different,
There is a problem that the display position of the point P2 is displayed at the point P2 '. Although it is possible to incorporate the difference in output voltage between FIG. 6A and FIG. 6B into the same coordinate value by incorporating software or hardware, the coordinate data digitizing unit 5 cannot be shared. However, there is a new problem that the cost is increased by increasing the number of parts. In order to solve this problem, an object of the present invention is to provide a touch screen having means for obtaining the same connection effect even if the connection positions of the connectors are on the opposite sides.

[0006]

In order to achieve the above object, the touch screen of the present invention adopts the structure described below.

It comprises a display section, a coordinate data detecting section, and a coordinate data digitizing section.
A coordinate data detection board and a connecting portion that connects the coordinate data detecting board and the coordinate data digitizing portion, and the electrodes that output the coordinate data in the horizontal and vertical directions of the connector of the connecting portion are the electrodes. It is characterized in that they are arranged in line symmetry at the center in the width direction.

It is characterized in that it has means for easily separating and connecting the display unit and the coordinate data detecting unit.

The tablet input device according to the present invention comprises a coordinate data detecting section and a coordinate data digitizing section. The coordinate data detecting section includes a coordinate data detecting board, the coordinate data detecting board and the coordinate data. It consists of a connecting part that connects the digitizing part, and the electrodes that output the horizontal and vertical coordinate data of the connector of this connecting part are
It is characterized in that they are arranged in line symmetry at the center of the electrodes in the width direction.

[0010]

When the coordinate data detection board 3 of the touch screen is rotated halfway and the connecting portion 4 is on the opposite side as shown in FIG. 2 (b), the detected right signal becomes the left signal and the upper signal. Will change to the bottom. However, as shown in FIG. 1, the positions of the electrodes are the upper electrode 4a, the lower electrode 4d, and the left electrode 4
b and the right electrode 4c are respectively at the connector connector center position 4e
If they are arranged line-symmetrically with each other, the same connection effect will be obtained as a result.

[0011]

The present invention will be described in detail below with reference to examples. FIG. 1 is a plan view of an example of the coordinate data detection unit 2 of the resistive pressure-sensitive touch screen of the present invention. The coordinate data detection unit 2 is roughly divided into a coordinate data detection board 3 and a connection unit 4, and the electrodes 4a to 4d on the connection unit 4 are transparent resistance film electrodes 3a to 3 of the coordinate data detection board 3, respectively.
The transparent resistance film electrodes 3a and 3d are connected to the transparent resistance film 3e, the transparent resistance film electrodes 3b and 3c are connected to the transparent resistance film 3f, and the transparent resistance films 3e and 3f are spacers. , Are arranged in parallel with a slight gap. A portion where the two transparent resistance films 3e and 3f overlap each other becomes a coordinate data detection area 3g.

2A and 2B are examples of plan views of the touch screen 1 of the present invention in which the coordinate data detection unit 2 of FIG. 1 is incorporated. In FIG. 2A, the coordinate data detection board 3 is arranged so that the connecting portion 4 is located on the left side.
The display unit 6 is arranged below the display unit 6, and the coordinate data digitization unit 5 is arranged on the left side of the display unit 6.
Has a built-in A / D converter 5a, a coordinate data digitizing section connector 5b, and a connection section 4. FIG. 2B shows the coordinate data detection board 3 of FIG.
Is rotated 180 degrees, and the connecting portion 14 is arranged so as to come to the right side of the coordinate data detecting board 3, and the coordinate data digitizing portion 5
The layout is also shown.

Next, the coordinate data detection in FIG. 1 will be described. The principle of coordinate data detection is similar to that of the normal resistance pressure sensitive type. First, by pressing any P1 in the coordinate data detection area 3g of the coordinate data detection board 3, one point of the two transparent resistance films 3e, 3f is Contact. At this time, when a voltage is applied between the electrodes 4a and 4d of the connection portion 4 to detect the horizontal coordinate, a voltage is applied between the transparent resistance film electrodes 3a and 3d of the coordinate data detection board 3, and the coordinate data detection board 3 through the transparent resistance film electrodes 3b and 3c, the electrode 4b
A divided voltage representing the lateral position is output to and 4c. The output divided voltage is input to the coordinate data digitizing unit 5 shown in FIG. At this time, the input of the coordinate data digitizing unit 5 is set to high impedance, and if the input impedance is sufficiently high, the electrodes 4b, 4c
The potential difference output to is at a negligible level. Similarly, for the coordinate data in the vertical direction, when a voltage is applied between the electrodes 4b and 4c of the connection portion 4, a voltage is applied between the transparent resistance film electrodes 3b and 3c of the coordinate data detection board 3, and the transparent resistance of the coordinate data detection board 3 is applied. A divided voltage representing a lateral position is output to the electrodes 4a and 4d via the membrane electrodes 3a and 3d. The horizontal direction detection and the vertical direction detection are switched, but if the switching is continued at an appropriate cycle, the horizontal direction and the vertical direction coordinates can be continuously detected. The voltage thus output is digitized by the AD converter 5a incorporated in the coordinate data digitizing unit 5.

Consider, for example, the case where the position indicated by P1 in FIG. 2A is pressed on the screen. Assuming that the position of P1 corresponds to 1/3 of the width Lx in the horizontal direction and the width Ly in the vertical direction from the point P0 of the coordinate data detection area 3g, the voltage applied in the horizontal direction is Vx volts, and the voltage applied in the vertical direction is Vy volts. Then, the output voltage representing the coordinates is 1 /
It becomes 3 × Vx volt and 1/3 × Vy volt.

At this time, the coordinate data detecting section 2 is shown in FIG.
Consider the case where a half rotation is performed as in (b). Figure 2
When the same coordinate data digitizing unit 5 as in (a) is used,
The electrode 4a of the connecting portion 4 connected to the coordinate data digitizing portion 5
And 4d are replaced with each other, and the electrodes 4b and 4c of the connection part 4 are replaced with each other. When the user of the touch screen 1 tries to press the same coordinate, the coordinate data detection unit 2 does not pay attention to the fact that the coordinate data detection unit 2 is rotating, and therefore the point P2 of the coordinate data detection area 3g in FIG. 2B is indicated. It will push the position. The point P2 is located at a position ⅔ of the width Lx in the lateral direction and the width Ly in the longitudinal direction from the point P0 in FIG. 6A, but as described above, the electrodes 4a and 4d and 4b of the connection portion 4 are Four
Since the voltage applied to c is interchanged, the output voltage is consequently 1/3 × Vx volts in the horizontal direction and 1 in the vertical direction.
A value of / 3 × Vy Volts is output. Therefore, even if the coordinate data detection board 3 is rotated, the same coordinate data digitizing unit 5 can be used.

FIG. 3 is an external perspective view of an embodiment of an information processing apparatus using the resistive pressure sensitive touch screen 1 of the present invention. 3 (a) and 3 (b) are the same model,
Regarding the display unit 6, the liquid crystal panel used is different from the monochrome type and the color type. For this reason, the connecting portions 4 of the touch screen 1 are on opposite sides due to the difference in the mounting dimensions of the liquid crystal.
The same coordinate data detection board 3 and coordinate data digitizing unit 5 are used (not shown). Further, the coordinate data detection unit 2 can be configured as an option by allowing the user to remove it.

Although the configuration and operation of this embodiment have been described above, the present invention is not limited to these configurations. For example, in the coordinate data detection board 3, the vertical and horizontal coordinate data are independent. An electromagnetic type or an electrostatic type may be used as long as it is an output device. 4 (a), 4 (b), 4 (c), and 4 (d) are partial plan views of the embodiment of the present invention showing the arrangement of the connecting portion 4 of the coordinate data detecting portion 2 different from that in FIG. Is. If the order of the electrodes is axisymmetric, there is no problem even if they are replaced as shown in FIG. At this time, even if the coordinate data detection board 3 has an active element such as a transistor and a separate power supply is required, there is no problem if the power supply electrodes are arranged in line symmetry as shown in FIG. 4B.
Further, even when a reference electrode is required for each coordinate data electrode, there is no problem if the electrodes are arranged line-symmetrically as shown in FIG. Further, if the number of electrodes is set to an odd number, the electrode 4 located at the center as shown in FIG.
There is no need to limit the use of g. The application example is not limited to the touch screen 1, and may be applied to the tablet input device in which the display unit 6 and the coordinate detection unit are independent.

[0018]

The present invention comprises a display section, a coordinate data detecting board, a coordinate data digitizing section, and a connecting section for outputting the coordinate data detected by the coordinate data detecting board to the coordinate data digitizing section. The electrode that outputs the coordinate data in the horizontal and vertical directions of the connector of
Due to the line symmetry, the same coordinate data detection board and coordinate data digitization unit output the coordinate data detected by the coordinate data detection board to the coordinate data digitization unit even on the opposite side. Can be used to configure the touch screen 1.

Further, by providing means for easily separating and connecting the display unit and the coordinate data detecting unit, it is possible to provide the touch screen 1 in which monochrome or color liquid crystal can be easily attached and detached.

The present invention further comprises a coordinate data detection board, a coordinate data digitizing section, and a connecting section for outputting the coordinate data detected by this coordinate data detecting board to the coordinate data digitizing section. Lateral direction of connector,
By arranging the electrodes that output coordinate data in the vertical direction in line symmetry with respect to the center of the width direction of the electrodes, even if the display unit such as a liquid crystal display device is not arranged below the coordinate data detection unit, this coordinate data It is possible to provide a tablet input device that can be used by rotating the detection unit 180 degrees.

[Brief description of drawings]

FIG. 1 is a plan view showing a coordinate data detection board and a connecting portion according to an embodiment of the present invention.

FIG. 2 is a plan view showing the configuration of the touch screen according to the embodiment of the invention.

FIG. 3 is an external perspective view showing an electronic device according to another embodiment of the present invention.

FIG. 4 is a plan view showing the configuration of a connecting portion according to another embodiment of the present invention.

FIG. 5 is a plan view showing a coordinate data detection board and a connecting portion in a conventional configuration.

FIG. 6 is a plan view showing a coordinate data detection board and a connecting portion in a conventional configuration.

[Explanation of symbols]

1 Touch screen 2 Coordinate data detection part 3 Coordinate data detection board 3a-3d Transparent resistance film electrode 3e, 3f Transparent resistance film 3g Coordinate data detection area 4 Connection part 4a-4d Electrode 4e Connection part connector center position 4f Connection part connector 5 Coordinates Data digitizing unit 5a A / D converter 5b Coordinate data digitizing unit connector 6 Display unit 12 Conventional coordinate data detecting unit 13 Conventional coordinate data detecting board 14 Conventional connecting unit P0 P1, P2 reference point P1 P0 1 / in the vertical and horizontal directions
The position corresponding to 3 is P2 / P0 from the vertical / horizontal direction 2 /
Position corresponding to 3

Claims (3)

[Claims] 1. A display unit, a coordinate data detecting unit, and a coordinate data digitizing unit. The coordinate data detecting unit includes a coordinate data detecting board, the coordinate data detecting board, and the coordinate data digitizing unit. And an electrode for outputting coordinate data in the horizontal and vertical directions of the connector of this connection portion, the electrodes being arranged in line symmetry at the center in the width direction of the electrode. touch screen. 2. A means for easily separating and connecting the display unit and the coordinate data detection unit is provided.
Touch screen described in. 3. A coordinate data detecting section and a coordinate data digitizing section, wherein the coordinate data detecting section connects the coordinate data detecting board and the coordinate data detecting board to the coordinate data digitizing section. A tablet input device comprising: a connecting part, and electrodes for outputting coordinate data in the horizontal and vertical directions of the connector of the connecting part are arranged line-symmetrically at the center of the width direction of the electrode.