JPS62128321A - Transparent tablet device - Google Patents

Abstract

PURPOSE:To construct a tablet device with a transparent input part and a high resolution in a simplified constitution by mounting two transparent insulation substrates on which crossing conductive very thin electrode wires are arranged. CONSTITUTION:On the first transparent insulation substrate 1, plural very thin electrode wires 3, 3... are arranged at a part enclosed with an alternate long and short dash line keeping a regulated interval. The very thin electrode wires 3, 3... are embedded in the first transparent insulation substrate 1, and are insulated from the surface of the first transparent insulation substrate 1. Also, at the inside of the alternate ling and short dash line 5 corresponding to the transparent part 2 of the first transparent insulation substrate 1 on the second transparent insulation substrate 4, very thin electrode wires 6, 6... are embedded and arranged in a direction which intersects orthogonally with the very thin electrode wires 3, 3... of the first transparent insulation substrate 1. Edge part electrode wires 7 and 8 formed with a conductive coating material are stuck on copper foils 10, 10... formed in a polyimide film 9 at the end part of the transparent insulation substrates 1 and 2 with a conductive sticking agent.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tablet device used as a bench-touch type digitizer or menu input section, and particularly to a transparent tablet device.

(Prior Art) Conventionally, an overlay displaying a single character, symbol, etc. is placed under the tablet.

Transparent tablet devices such as those placed on a display screen such as a CRT or 7ft crystal have been proposed.

(Problems to be Solved by the Invention) As an example of a conventional transparent tablet device, a metal such as tin is deposited thinly on a transparent sheet to make the electrodes transparent. This transparent tablet has a large resistance value per unit area, and the vapor-deposited electrodes are placed facing each other in the X and Y axis directions.
An insulator with a hole as a thin spacer is placed between the facing electrodes, and one electrode is pressed with a finger or a rod-like object, and the contact between the facing electrodes produces a signal corresponding to the suppressed position. was inputting. In this way, it has been possible to use it as a touch panel in the past, but it has not been put to practical use that requires high detection accuracy using a detection plate or the like, and that detects without contact with an electric current.

(Means for solving problems) The present invention aims to solve the above problems.

Tablet/1 - The back side is made transparent and displays 9 characters, symbols, etc.
Place the fc overlay below the tablet and view the overlay from above the tablet. Alternatively, you can use a transparent tablet on a display device such as a CRT or night crystal.
Check the CRT and LCD display status from the front of the tablet.

By bringing the detection pen into contact with a desired position on the tablet, a corresponding position signal of the detection pen to the tablet is input. Its structure consists of a plurality of conductive ultrafine electrode wires arranged at intervals on an insulating substrate made of a transparent synthetic resin, and an insulating substrate such that the ultrafine electrode wires made of a plurality of conductors intersect in the arrangement direction. Phase 7j is a transparent tablet device in which two insulating substrates on which the intersecting conductive ultrafine electrode wires are arranged are properly attached.

(Example) An example of the present invention will be described with reference to the accompanying drawings. 1st
The figure is an exploded perspective view of the tablet, FIG. 2 is a connector section of the tablet, and FIG. 3 is an electrical block diagram. Thickness is 1
A first transparent insulating substrate 1 made of two-layered polycarbonate
On top.

A plurality of ultrafine electrode wires 5, 3, . . . are arranged at regular intervals (for example, 1 g) in the area surrounded by the dot-dash dots 2. Ko0
The area surrounded by the one-dot chain line 2 is set as the transparent area of the tablet.

The ultrafine electrode wire 3 disposed within this transparent portion 2 is as follows:
Stainless steel with a diameter □ of approximately 20μ7n is used, and these ultrafine electrode wires 5, 5. * is included in the first transparent insulating substrate 1 and is insulated from the surface of the first transparent insulating substrate 1. Further, in the second transparent insulating substrate 4, within the chain dot 5 corresponding to the transparent portion "2" of the first transparent insulating substrate 1.

Ultrafine electrode wires 5, 5 on the first transparent insulating substrate 1. The ultra-fine electrode wires 6, 6. ...is filled in and placed in a 5-inclusive layout. Next, each ultra-fine electrode wire 3.5°...
・,6,6. The transparent portions 2, 5 and the portion extending to the edge of each transparent insulating substrate 1, 40 are formed of conductive paint using the blank screen printing technique. (Reference numeral 7.8) Edge electrode wire 7 formed with this conductive paint
, 8 are attached to the copper foils jO, 10, . . . formed on the polyimide film 9 at the ends of the transparent insulating substrates 1 and 2 using a conductive adhesive. This copper i10,10. The copper foil portion at the other end of the polyimide film 9 formed with . . . is solder plated and connected to a flexible 7-pull connector. Section 5 on how to use the transparent tableaf formed in this way
This will be explained with reference to the electrical block diagram shown in the figure. Each ultra-fine electrode wire 3.6 of the tablet 11 on which the schematically illustrated ultra-fine electrode wire 3.6 is arranged has a decoder 12.1 for each of the X and Y axes.
3 is connected. A clock is generated from the clock generator zt14 (for example, IMHz) and applied to the counter 15. This clock is frequency-divided and sequentially applied to the decoder 12.13, and pulses are sequentially applied to the ultra-fine electrode wires 5.6 in each direction. The count value of the counter 15 is applied to the coordinate data memory. Signal detection pen 16
capacitively couples with the ultra-fine electrode wires 5 and 6 closest to the position where the pen tip is in contact, and detects the pulse applied to the ultra-fine electrode wire 3.6.

A waveform shaper 19 via an amplifier 18. A rare signal is applied to the analog-to-digital converter 20.

A strobe signal is applied to the coordinate data memory 17 based on the waveform-shaped signal. This coordinate data memory 17 records the data of the ultrafine electrode wire closest to the contact position of the signal detection pen 16, but it is also possible to improve the detection accuracy. The electric potential of the signal of the ultrafine electrode wire 3,5°6.6 adjacent to the position of the tablet 11 is recorded in the electric potential memory 22. Here, the potential detected by the signal detection pin 16 is approximately proportional to the distance between the contact position of the signal detection pin 16 and the adjacent ultrafine electrode wire, and the potential detected by the signal detection pin 16 is V+4 in relation to the detected phase. =V
2 A2 (Formula 1) is calculated by the arithmetic circuit 21. (However, t.

t2 is the distance between the adjacent ultrafine electrode wire and the signal detection bevel,
(V, , V2 are detected potentials from the respective ultra-fine electrode lines) Since the distance between the ultra-fine electrode lines is determined from At/tt-V2/Vl in this arithmetic circuit 21 (for example, i mm).

If the calculation is performed up to 1/10, a resolution of 0.1wn can be obtained. Actually, since Equation 1 is an approximate equation, the data is corrected using the correction data table 23 and outputted from the output vanofer 24 to the outside.

(Effects of the Invention) Since the present invention has the above structure, it is possible to achieve a tablet device with a transparent input part and high resolution with a simple structure, and it is also possible to create a device integrated with a display device such as a CRT or liquid crystal. It can be manufactured.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view of a tablet, FIG. 2 is a connector section of the tablet, and FIG. 5 is an electrical block diagram. 1.4...Transparent insulating substrate, 3,6...Superfine electrode wire. 7.8...Reed conductive paint, 10...Copper foil. 11 Tablet y l□, + 6 Signal ((output). 17 Coordinate data memory, 22 Potential = Mi and memory

Claims (1)

[Claims] An insulating substrate made of transparent synthetic resin, a plurality of conductive ultrafine electrode wires arranged at intervals on the insulating substrate, and the insulating substrate so that the ultrafine electrode wires made of the plurality of conductors intersect in the arrangement direction. A transparent tablet device comprising two insulating substrates facing each other and having intersecting conductive ultrafine electrode wires arranged thereon.