JPH0126087B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a transparent coordinate position input device for a display device, particularly for anti-glare and light-proofing of a cathode ray tube in a self-luminous display device. This invention relates to a transparent coordinate position input device that integrates an anti-glare mask and coordinate position input by pressing a position on a display.

[Prior Art] The transparent touch panel method is attracting attention as an input device for computers, and this allows commands to be entered into a computer by touching a cursor, numbers, characters, or symbols displayed on the screen with a finger. It is considered basic to do so. And this tatsuchi・
As for the panel method, the resistive film method is well known, and this uses, for example, pressing between two polyester sheets with electrodes provided in the X or Y direction. is transmitted to the host processor.

[Problems to be solved by the invention] This is because there is no anti-glare or anti-light device for the light from the cathode ray tube, which causes fatigue and deteriorates eyesight when used for long periods of time. There is a problem. Therefore, it is being considered to attach an anti-glare mask to the screen of a cathode ray tube, and there is a need for a device that also includes a transparent input device to simplify input and allows both to be used at the same time.

[Means for Solving the Problems] The present invention relates to a transparent coordinate position input device that satisfies such requirements. Transparent printed circuit boards arranged in parallel and an anti-glare mask having parallel stripes made by alternately laminating black conductive members and transparent insulating members are spaced so that the directions of the conductive wires and the parallel stripes are in the X and Y directions. It is characterized by being arranged facing each other.

To explain this, the present inventors studied a coordinate position input device that has an anti-glare mask and a transparent input device at the same time, and found that the anti-glare mask has a black conductive resin with a thickness and width in the lateral direction. In addition to being able to use it as a louver in the original anti-glare mask, we discovered that it could also be used as an electrode, and we developed an anti-glare mask constructed in this way and a transparent conducting wire. The present invention was completed after confirming that the desired coordinate position input device could be easily obtained by combining the above-mentioned transparent printed circuit board.

Next, this will be explained based on the attached drawings.
Figure 1 shows an anti-glare mask 4 used in the device of the present invention.
This is a perspective view of a transparent insulating rubber or resin sheet 1 made of silicone rubber, urethane rubber, vinyl acetate, styrene resin, etc., and these rubbers and resins are usually coated with acetylene black, butane. Black conductive rubber sheets or resin sheets 2 made by mixing carbon black such as black and a conventionally known conductivity imparting agent added as necessary are laminated alternately,
This can then be cut along cutting lines 3 substantially perpendicular to the laminated surface. The anti-glare mask 4 thus obtained has a black conductive member 10 and a transparent insulating member 11 (see FIG. 3a) alternately laminated with a constant width in the thickness direction. The conductive material serves as the louver of the anti-glare mask, allowing you to see through the screen of the display device at a constant brightness from the front, but it blocks out excess outside light from above and below, making it impossible to see the screen clearly. can. Since the black conductive member is usually made conductive by incorporating carbon black, it can also be used as an electrode.

Moreover, FIG. 2 shows a plan view of a transparent printed circuit board 5 used in combination with this anti-glare mask, which is made of glass, polyester resin, acrylic resin, vinyl chloride resin, transparent silicone rubber, etc. On a transparent substrate 6 made of synthetic resin or synthetic rubber, transparent conducting wires 7 made of a transparent metal film made of indium oxide, tin oxide, or an alloy thereof are deposited, for example, with a width of 1.0 mm and a pitch of 2.0 mm. Regarding the material of this substrate, it is preferable to use a polyester sheet from the viewpoint of cost, and a glass plate from the viewpoint of durability.

3a and 3b show the transparent coordinate position input device of the present invention, which is a combination of the above-mentioned anti-glare mask 4 and transparent printed circuit board 5 , facing the cathode ray tube 9, and a is a schematic longitudinal cross-sectional view thereof. ,b is a plan view of the anti-glare mask 4 as shown in FIG. 3a.
and a transparent printed circuit board 5 are attached to the outer peripheral frame 8 at a certain interval, for example, 2 mm. The image screen on the cathode ray tube is visible through the transparent printed circuit board, but the black conductive member of the anti-glare mask is visible in a horizontal straight line with a width in the thickness direction of the mask, so the light from the cathode ray tube is visible through the transparent printed circuit board. This has the effect of preventing glare, and when a point on the anti-glare mask 4 is pressed with a finger, the transparent conductive wire 7 on the substrate and the black conductive member 10 as an electrode are removed.
This contact point is communicated to the host processor as an X, Y coordinate.

Note that the insulating member and the conductive member in the anti-glare mask 4 described above are, for example, approximately 0.2
The conductive member may have a thickness of about 0.02 mm, and the distance between the anti-glare mask and the printed circuit board may be generally 1.0 to 3.0 mm, preferably 1.5 to 2.0 mm.

Next, an example of the present invention will be described, but it goes without saying that the present invention is not limited thereto and can take various forms within the scope of the claims.

[Example] Transparent silicone rubber compound KE174U
[Product name manufactured by Shin-Etsu Chemical Co., Ltd.] 100 parts of curing catalyst C-
A transparent silicone rubber sheet with a thickness of 0.3 mm is made by extrusion molding from a silicone rubber base material obtained by adding 2.5 parts of 10 (product name manufactured by the company), and a conductive black silicone rubber base material C40P [Shin-Etsu Polymer ( 0.02 mm thick black conductive silicone rubber sheets are made from 0.02 mm thick black conductive silicone rubber sheets, which are laminated alternately and heat-pressed to form an integrated product.The laminate is then rolled in a direction approximately perpendicular to the lamination direction. I cut it into pieces with a thickness of 0.22mm and made an anti-glare mask measuring 250 x 320mm.

On the other hand, on a transparent glass plate of 250 x 320 x 2.0 mm,
A transparent printed circuit board 5 was prepared by depositing an indium oxide film with a width of 0.8 mm at a pitch of 1.6 mm as a transparent conductive wire.

Next, this anti-glare mask and a transparent printed circuit board were attached to a polyvinyl chloride film with external dimensions of 270 x 270 x 15 mm so that the black conductive member of the anti-glare mask and the transparent indium oxide conductive wire on the printed circuit board were almost perpendicular to each other. A transparent coordinate position input device was made by attaching it to the resin outer frame 8 at 1.5 mm intervals, and this was combined with a cathode ray tube device to operate as a resistive touch panel for computer input.
This touch panel uses an anti-glare mask to block the light from the cathode ray tube, so it does not cause fatigue even when used for long periods of time, and since it is made of silicone rubber, you can prevent glare by lightly pressing the anti-glare mask surface. The contact point between the black conductive member on the mask surface and the indium oxide transparent conductive wire on the printed circuit board was input into the computer as X and Y coordinates.

[Effects of the Invention] The present invention has anti-glare properties, so the eyes do not get tired, and the anti-glare member of the anti-glare mask also serves as a conductive member, so
It has excellent industrial effects as it has a small number of parts and is easy to assemble.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an anti-glare mask used in the device of the present invention, Fig. 2 is a front view of a transparent printed circuit board used in the device of the present invention, and Fig. 3a is a longitudinal cross-sectional view of the device of the present invention. Figure 1b shows a plan view thereof. 1... Insulating sheet, 2... Conductive sheet, 3
... Cutting wire, 4 ... Anti-glare mask, 5 ... Transparent printed circuit board, 6 ... Transparent substrate, 7 ... Transparent conductor wire, 8
...Outer frame, 9...Cathode ray tube, 10...Black conductive member, 11...Transparent insulating member.

Claims (1)

[Claims] 1. In a coordinate position input device that faces the screen of a display device, an anti-glare mask has a transparent printed circuit board with a plurality of transparent conductive wires arranged in parallel, and parallel stripes made by alternately laminating black conductive members and transparent insulating members. A transparent coordinate position input device characterized in that the conductive wires and the parallel stripes are arranged facing each other at intervals such that the directions of the conductive wires and the parallel stripes are in the X and Y directions.