JPS63231419A - Substrate for image display input device - Google Patents

Abstract

PURPOSE:To simplify production process and to improve a display effect by providing bipolar elements provided with a current rectifying effect by 3-layered constitution consisting of a thin metallic film, semiconductor film and transparent electrode to each of the electromagnetic induction electrodes of a substrate for an image display input device. CONSTITUTION:Chromium, aluminum, nickel, etc. are used for the thin metallic film 12 and amorphous silicon, zinc oxide, etc., are used for the semiconductor film 17. The transparent electrodes 15 are formed of materials which have high transmittance in a visible region and good electrical conductivity such as In2O3-SnO2 and SnO2 added with anitomony oxide. The soldering process of diodes, etc., is eliminated by building the bipolar elements provided with the current rectifying effect simultaneously by the thin film process for forming the electromagnetic induction electrodes 12 and the transparent electrodes 15. The display grade of the liquid crystal panel is improved by incorporating the bipolar elements having the similar constitution in each of the plural picture elements.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a substrate used directly for displaying and inputting images and characters, particularly for displaying images and characters on the same panel.

This invention relates to a +1tjf image display device that can be displayed manually.

<Prior Art> As a conventional example of a device having both an input function and a display function for images, characters, signals, etc., a device such as 161521/1984 was devised. In this column, a display electrode and a static capacitance detection electrode are provided in the liquid crystal panel, and the position touched by the temperature user is read by the detection electrode and used as a signal input. This principle uses the fact that when pressed with a finger, the upper plate on which the detection electrode is formed bends, the gap between the ground and the lower plate changes, and the static wax changes accordingly. It is something.

In addition, a digitizer is installed on the F of the liquid crystal panel to form a multi-conductor pattern on glass curved epoxy resin, etc., and perform position detection based on the principle of Seizo coupling method or Seiji induction method.
However, there are devices that have a digitizer with an input function and a liquid crystal panel with a display function.

The principle of electromagnetic induction position detection will be briefly explained.

FIG. 6 is a conceptual diagram when electromagnetic induction electrodes are arranged in a matrix. Figure dc5 is a partially enlarged view for explaining the input method. The input device it consists of inductance elements 625, 16, an AC power supply port υ, and a gate υ. The inductance element 621b16'lJ is marked with an alternating current 710 at both ends, and the magnetic flux passing through the 21.epsilon force increases and decreases rapidly in this inductance element.The input crack t'v, tm of this configuration A conductive wire 53 which is an induction electrode
11 ellipse, (If placed within the section of tJ, there will be a difference in precept between the two conductors that sandwich that section, resulting in a force of 46.
By measuring the four currents of the conductor I using a switching controller as shown in the figure, the presence position of the inductance element can be determined. Therefore, the position rt indicated by the input device can be read by sequentially operating the switching controller for the arrangement of the conductive wires (electromagnetic induction electrodes) in the two directions, X and Y.

<Problems to be Solved by the Invention> The input resolution of the liquid crystal panel, which can perform input by changing the capacitance described above, is on the order of several 1 because the method of detecting the human position through the deflection of the detection electrode is used. There was only one. Therefore, it could not be used for applications that require high resolution, such as CAD and character input.

In addition, a digitizer is superimposed below the liquid crystal panel via a light source such as EL (electroluminescence),
In the conventional method used as an image display input device, there is a gap between the product panel and the digitizer, and the distance from the digitizer to the input f, It ('t m pen or cursor) becomes large, making it difficult to accurately determine the input position. This creates difficulty in detection. Moreover, the display position and input position IIIF
, a mazuching style mahjong was required, and there were 4 panel assemblies. In addition, in order to increase the reading rate of the digitizer signal or to simplify data processing, it is necessary to solder rectifying elements (diodes) to the ``tiita induction'' electrodes as shown in Figure 6. As the number of earthquakes increased, it became a problem in the earthquake construction process.

Means for Solving the Problems> In order to solve the above problems, the present inventor first developed a display input integrated type display input device in which a 4vi induction pole for position detection is arranged in the liquid crystal panel. It was invented in

°The present invention is an improvement on this prior invention, and is for a painter display input device for a liquid crystal panel having a transparent electrode for driving a liquid crystal and a modified tm induction electrode for position detection arranged in a matrix of VLA pixels. A board for placing an image display human power device, characterized in that each of the magnetizing induction electrodes is provided with a bipolar element having a rectifying effect by a 31-structure of a metal # film, a semiconductor film, and a transparent electrode. be.

The bipolar element in the present invention may have a layered structure that has a rectifying effect all at once. Gold pA rl pattern is chromium.

Four types of good conductors such as aluminum, nickel, titanium, copper, gold, platinum, palladium, lead, etc. or a combination of these metals
The semiconductor film may be made of amorphous silicon, zinc oxide, titanium dioxide, or titanium oxide pA/ (Ta20
5) s IIR tungsten (WO3), titanium y
p barium, Q oxide (Sn 02 ), copper oxide (Cu
20), tellurium oxide (TeO2), cadmium-selenium (CdSe), cadmium sulfide (CdS), or their oxides or solid solutions. Transparent electrode is IT
In2Os-8n Oz type called O, 5n0
2 with antimono oxide added, ZnO with l'd1
It may be formed of a material that has high transmittance in the visible range and has good conductivity, such as a material splinted to 203.

<Function> The present invention provides 24. Since the elements are simultaneously fabricated using a thin film process that includes electromagnetic induction, four solder electrodes, and transparent electrodes, soldering of diodes, etc., can be omitted. Furthermore, the present invention can be incorporated into each pixel of a bipolar element having the same structure, thereby improving the display quality of a liquid crystal panel.

A detailed explanation will be given below based on the embodiment.

<Example 1> Figures 1 and 2 schematically show an example of the present invention, and Figure 1 is a substrate of the present invention. A cross-sectional view of the image display input device used, and FIG. 2 is a plan view of the same portion. Cr (1000 people)/l on one side of glass substrate 1ul1%1211
31- of yl (3000λ)/C'r(1oooλ)
The vaporized layer layer consisting of t-magnetic dielectric 4 (pole 11 Lf 22) is formed by patterning by etching method. R (red), G (green), and B (blue) filters made of gelatin dyed membranes with a thickness of about 1.5 μm are arranged between R, G, B, and 'lt magnetic conduction filters. On the gelatin layer U21.t22, there is an overcoat M141.t2 of approximately 1 μm in gelatin, and on the overcoat f141,024) there is a transparent layer made of indium oxide and tin oxide +151% (c). product i4
It is shi. At the end of the ``1 magnetic induction electrode'' tit 23, there is attached a semiconductor film of zinc oxide 14iGuη (a bipolar element of 51- configuration, which is sandwiched between an electromagnetic induction electrode and a transparent single pole with the so-called intermediate 1-). .'1tl+a induced single pole Q81, (
The intersection point of 2) is the transparent 'electrode'(25'
) is wired with 211#.

Figure 41 shows an image display device in which a liquid crystal 101 is sealed in the opposite glass substrate (11'), which is the same as the glass substrate with the above configuration except for the presence or absence of R, G, and B. ing. In FIG. 1, the two-pole element is shown in an exposed form, but in reality, the two-pole element was protectively coated with epoxy resin. In addition, zinc oxide u1, (2) and transparent electrode (1
In No. 51, the film was attached by sputtering.

Embodiment 2> FIG. 3 shows a second embodiment of the present invention. :Schematically shown in a partial plan view. An electromagnetic induction electrode 6z and a liquid crystal electrode ω having the same layer structure as in Example 1 are arranged.
There is. The transparent 'electrode' which is the pixel' electrode is connected to the liquid crystal driving quadrupole field through two bipolar elements having different rectification directions. 2
The bipolar elements are shown as tal and (bl in Figure 44, which is a schematic cross-sectional view of N-, B-B', respectively. In Figure 4, the liquid crystal drive quadrupole [4 (l is the pixel electrode) Transparent electrode (4
They are electrically connected via the zinc oxide r@(4η, (47')) and the auxiliary transparent electrode (45) and the auxiliary conductor (40). A bipolar element consisting of 1 part of zinc and a transparent 4-pole element is attached, and the intersection of the electric Ila induction part and the liquid crystal drive electrode (towards), etc. is absolutely impossible to pass through. Wired with 21# transparent electrodes.

In the above embodiments, the ends of the electromagnetic induction poles, liquid crystal drive electrodes and transparent electrodes are plated with Au, Sn, or Ni to facilitate electrical contact.

It remains white even after metallization such as soldering. In the embodiment, the material of the insulation 1 used for the 214 wirings of the electromagnetic induction electrode is shown to be an organic resin, but it may be an inorganic material such as 5in2, 0, or an organic/inorganic multilayer structure.

In Example 2, a configuration was shown in which no protective coat was formed for the bipolar element, but the protective coat could also be used as a black matrix to improve the contrast of the display, and patterning could be performed using, for example, a resin layer mixed with a black layer coloring agent. It may be formed.

In addition, in the example, the number of pixels is small because it is a schematic diagram, but is the number of pixels appropriate for graphic display, video, and TV display?
Of course, it can be directly attached to an actual image display device. Liquid crystals can also be used in various types of liquid crystal display devices including TN, super TN, ferromagnetic type, phase change type, and guest-host type.

<Effects of the Invention> The present invention is used for a liquid crystal display device that combines a flat liquid crystal display device with a human power function so that display input can be performed on the same surface and without moving the line of sight on a desk where it is easy to work. be. In addition, it has a higher input density than before,
Text input and graphic design have become extremely easy. Since the input point and the display point are the same, input errors do not occur, and it has become possible to provide an input device that displays images on a pixel basis.Furthermore, this is an aspect of the present invention.

Two-pole element? With a thin film thickness of 1-, the image was incorporated into a substrate for a display input device, thereby simplifying the manufacturing process and further improving the display effect.

[Brief explanation of drawings]

FIG. 1, FIG. 2, FIG. 3, and FIG. 4 are all schematic illustrations of a substrate for a painter display input device according to the present invention. Figure 2 is a cutaway view of the same, Figure 13 is a partial plan view of the board of another embodiment,
Figure '44 is a partial view of the opening. Figure 5 and Channel 6 are
i! FIG. 2 is a schematic diagram for explaining a method of detecting an input position using a magnetic induction method.

Claims (1)

[Claims] 1) In an image display input device having a transparent electrode for driving a liquid crystal and a plurality of electromagnetic induction electrodes for position detection, each electromagnetic induction electrode has a three-layer structure of a metal thin film, a semiconductor film, and a transparent electrode. 1. A substrate for an image display input device, characterized in that a bipolar element having a rectifying effect is attached thereto. 2) The image display input substrate according to claim 1, wherein the intersection of each terminal portion of the electromagnetic induction electrode is formed into a two-layer wiring made of three layers: a metal thin film, an insulating layer, and a transparent electrode. 3) The image display input substrate according to claims 1 and 2, characterized in that a color filter is attached.