JPS5930133A - Malfunction preventing method of transparent coordinate detecting device - Google Patents

Abstract

PURPOSE:To execute an input with high reliability, by further laminating a transparent ground conductive layer to keep it a normally insulated state, in a transparent coordinate detecting device consisting of >=2 sheets of face-like conductive layers which contact at the time of pressure and usually are laminated in an insulated state. CONSTITUTION:As for a transparent coordinate detecting device superposed on the face of a display device such as a CRT, etc., a position signal can be fetched as soon as a coordinate of a video is pressed with a pen point, therefore, a computer input can be executed by only pushing its part, watching the information on the display. According to this invention, when placing a transparent coordinate detecting device 16 in front of a CRT 11, an electrode 14 is formed by silver paste on a transparent conductive layer of a transparent conductive film obtained by vapor-depositing an InSn oxide 13 on a film 12, lead wire 15 is grounded, and a lead wire 20 is fetched and grounded by the same constitution, on the reverse face of the device 16.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement for preventing malfunction of a target detection device in a transparent ILl.

m-) of the device that detects Zama on a certain surface in the east of 1iC
2, usually two sheets laminated in a Tfl gas insulating state, or two sheets that are in contact only when pressed as
There is a transparent coordinate detection device consisting of /1, and a transparent A)
Therefore, if you do not project the image 1'l of a CRT or plasma display device, etc., and suppress the position (I'2') in the image with your finger or the tip of a pen, you should at the same time * Cloudy = Pressing the same position,
Contact II! It is possible to extract signals corresponding to the coordinates from both electrodes of the coordinate detection device by t J,
11 can be used to input coordinates to IN, etc., and display the multidimensional information of 2... (+, Nakara Jl) Just by pressing 3 on that particular place, it is possible to input it into Den Jv Darkness,
It simplifies key operations for input, and is expected to be used in a variety of fields in the future.

This type of coordinate detection device uses a transparent plasdinox film, such as a polyethylene terephthalate film, as a planar conductive layer, a metal tin oxide such as gold, a metal oxide such as indium-tin oxide, or a conductive material such as copper iodide. It is constructed using a thin film of conductive material formed by vacuum evaporation, sputtering, ion derating, etc. If the planar 471 layer is entirely one conductive layer, the coordinates can be detected analogously, and if the conductive layer is divided into several parts and a signal is extracted by attaching W r + k to each, it can be detected digitally. It is possible to detect the sitting inclination, and it is possible to detect the inclination depending on whether the conductive layer is made entirely or divided, and at what position the screen is placed. I can make things. (For example, especially I1 57-64238,
1984-103489, 1984-110329. Showa 57
-tloas7) The present invention uses 21 such transparent coordinate detection devices.

This type of transparent coordinate detection device is preferably installed as close as possible to the front of various types of displays, such as CRTs, plasma displays, LC displays, F;L, etc., which are transparent.

However, this insertion transparent coordinate exposure device sometimes
Coordinates different from 't, li'e are also detected, and other coordinates are detected (person) J.
I was able to see the inside with a sharp point. In particular, in the above-mentioned allilog type coordinate detection device, 1-rubble is particularly common.

The name of the present invention is based on a thorough investigation into the cause and solution of this type of defect, and although the cause could not be identified, the solution was to add one or two grounded transparent conductive layers to the transparent coordinate detection device. We have discovered that this problem can be completely resolved by stacking the detection device in an insulating state.

That is, the present invention provides a transparent coordinate detecting device consisting of two or more planar conductive layers that are in contact only when suppressed and are normally electrically insulated, and a transparent ground conductive TL layer is further laminated in a normally insulated state. This is a coordinate detection device characterized by the following.

The transparent conductive layer used in the present invention generally has a surface resistance of 1M07 or less, a line transmittance of 40% or more, preferably 1
It is best to use one with a surface resistance of 07 or less at 0° and a light transmittance of 70% bleached 1. These transparent conductive layers are made of various metals such as 7/l/mi=17,z,
Metals such as iron, nickel, tankard, copper, gold, silver, and cobalt, metal oxides such as tin oxide and indium tin oxide, and other conductive materials such as copper iodide, titanium nitride, and carbon nitride. The plastic material is formed on a plastic film, for example, a biaxially oriented polyethylene terephthalate film, by vacuum deposition, sputtering method, ion delamination method, or the like.

Each conductive layer in the coordinate detection device 4 and the further laminated ground conductive layer may be made of the same material or different materials, but in general, the ground conductive layer should not impede transparency. It is a good idea to consider this as a priority when making a selection. In order to increase the transparency of 171, it is possible to partially etch the Ir4 conductive layer to leave a net-like conductive layer, depending on the 1ffl property of the material of the conductive layer. . Also, i*711t4I thin 11R was provided on both sides of the plastic film, and the 14th side was used as a coordinate detection device, and the 11th
If this layer is used as a ground conductive layer, the (1G configuration) of the device of the present invention can be simplified.

The 7J' method for grounding the conductive layer is to apply a conductive layer such as silver paste 1/'C' to the 4th or 4th circumference of the transparent conductive layer.
After attaching the IlH area +ig I+lj l-1 eyelet and pulling out the lead wire, connect the end of the lead wire to ground.

Grounded feeling? Tis may be laminated between a display such as a CRT and a transparent coordinate detection device, or may be laminated on the surface of a transparent coordinate detection device. If only one of them is used, the former is better, and in order to ensure completeness, it is better to use both 111 and the latter, that is, to sandwich the transparent coordinate detection device from both sides with a grounded conductive layer.

In either case, since it is a transparent conductive layer, it does not impede the characteristics of an inventive device installed on the 011 side of the display. Further, when a transparent conductive layer is laminated between the dip play and the coordinate detecting device and on the surface of the coordinate detecting device, the malfunction prevention 11 of the coordinate detecting device will not be effective unless the transparent conductive layer 1E is grounded.

An example of the present invention will be shown below.

First, as shown in Figure 1, a transparent coordinate detection device was prepared using indium tin oxide on a biaxially stretched polyethylene terecrate film 2 with a thickness of 125 th m on a substrate 1 of polymethyl methacrylate 1- (thickness 511#). 7i1i4.4' were formed with silver paste on both sides of the transparent conductive layer 30 of the transparent conductive film on which the material was vapor-deposited so as to be parallel to each other, and lead wires 5.5' were drawn out.

Next, polycarbonate sheet L (Ivsa05 mackerel) is used as spacer 6, and the same <Ivmi125J piece is placed on top of it...
11+ hT, j+f+ Both 1B11 of the transparent conductor 7E layer 8 of the transparent conductor 1'1 noylno, in which the polyethylene terephthalate 7 is coated with tin oxide.
71i with silver paste so that the parts are flat 5t1 to each other:
Formed Sui 9.9', drew Li = 1 Gen 10, J O', and made a small arrangement so that Electric I 4.4' and 9.9' intersected.

Transparent! I'li,' +41+Fi7I・l、IzutL also has Tycel Chemical Oil IJ15J4711+
'lfi/remu1! v,, ri J(-E C (table (fi resistance approx. 300 Ω/l-1, r'IJ visual nine-ray transmittance approx. 80%) was used. Obtained first figure σ) Transparent P dollar M Detector F (IJJ ray transmittance was approximately 60%).

Next, as shown in FIG.
When installing at 111f of 1T11, +25.
1. m/rf, Mino'1lQllWl17 (/l/
(transparent conductive layer film on which tin oxide 13 was vapor-deposited (Daicel Chemical Co., Ltd.) surface II (anti + o i<Ω/('', nJ visual light transmission approximately 90% An electrode 14 was formed using silver paste on the transparent conductive layer, and a lead wire 15 was taken out and grounded.

y, A on the surface of the clear coordinate detection device 16, 125p Ij
In the transparent conductive layer of a transparent conductive film (-8k surface resistance 10 KΩ/mouth, visible light transmittance approximately 90%) made of indium tin oxide 18 coated on a 1-thick biaxially stretched film 17. Electrodes 19 were formed with silver paste I, and lead wires 20 were taken out and grounded.

The coordinate detection device made of two transparent conductive films has a light transmittance of about 50% as a whole, and can be used as a transparent coordinate detection device placed on the 11th surface of CIt T etc. had suitable transparency.

Next, the coordinates of the four coordinate detectors are 5.5', io, io.
'Vertuna I Recomputer PC-6 manufactured by Japan WL Keisha
It was connected to a 000 series graph-innocent display interface PC6051 and operated on a PC6000 personal computer.

When the coordinate detector j6 installed on the front of the CRT was pressed with a finger, a point corresponding to that position was displayed on the CR7 screen.

On the other hand, if the ground of lead wire 15 is disconnected, PC6000
The normal operation is no longer possible, and it is no longer possible to draw an accurate diagram on the surface of the CR7 by pressing the coordinate detection device with a finger.

Next, a static electricity generator (Noise Senkyi, I: ili!I, Ijrindr+l
ESS-625S) TE OK
Although an electrostatic voltage of V was applied, the computer operated 1; C1 for 1f.

・When I disconnected the ground of the Lee-1 wire 2o, the PC6000's PC6000 lost 17 liters of power due to the static voltage of 10 KV, making normal IF input impossible.

4.1 Explanation of ffi'i The first figure is a cross-sectional view of the coordinate detection device for implementing the present invention.

1 Bracket machine 2 4 (Lille Q ?i', layer: 3 layer formation 3 () Ile 11
3 Transparent I relay r* 'lli: layer 4.4'11H', I&i 5.5' lead wire 6, spacer 7, base material for transparent conductive layer 8, 8, transparent conductive layer 9, electrode 10, lead wire FIG. 2 is a schematic cross-sectional view showing an embodiment of the present invention.

11, CRT 12, sacrificial fillet 13 of transparent conductive layer 13, transparent conductive layer 14, electrode 15, lead wire 16, transparent coordinate detection device 17 of FIG. 1, thread material film I8 of transparent conductive layer 18, transparent conductive Layer 19, electrode 20, lead thread station

Claims (1)

[Claims] Two sheets laminated in contact only when pressed and normally in an electrically insulated state, or 1. ．． 1. 1. A detection device of section 1, characterized in that a transparent coordinate detection device comprising a planar conductive layer of -1- is coated with a transparent ground conductive layer of l'/ in a constantly insulated state.