JPS5838799B2 - EXIYO HIYOJISOSHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid crystal display element in which a large number of functional elements having the same function are integrally formed in an array on a substrate of the liquid crystal display element.

Conventionally, in order to display a large number of selection points on a liquid crystal display element by electrical drive, electrode terminals corresponding to these many selection points are guided to one end of the liquid crystal display element substrate, and these electrodes are connected to one end of the liquid crystal display element substrate. The desired electrical drive was only possible by connecting the necessary circuits with multiple lead wires.

In such a method, a circuit having arbitrary electrical characteristics is constructed on a portion of a printed circuit board or the like outside the liquid crystal display element, and a desired display is performed by adapting the circuit to the characteristics of the liquid crystal.

However, it is often desirable to maintain some common electrical functionality in order to selectively electrically display a large number of selected points.

That is, there are cases where it is desired to have a memory function or a time division drive function.

In such cases, if a circuit with a functional element that performs an additional electrical function is provided in addition to the liquid crystal display element as in the conventional method, the electrical connection between the liquid crystal display element and the circuit may be hindered. In the case where a large number of functional elements are used, or when a large number of functional elements are provided, uniformity cannot be obtained among the functional elements.

Alternatively, sufficient effects cannot be obtained in terms of size and weight reduction, high reliability, number of manufacturing steps, etc.

The present invention has been made in view of the above points, and is different from the conventional method in which a certain function is achieved by connecting between a liquid crystal display element terminal and a circuit element provided on a printed circuit board. The object of the present invention is to provide a novel liquid crystal display element that is manufactured with an integrated structure with the element and can be handled as if the liquid crystal display element itself originally had the function.

In addition, in the past, the idea of integrating these elements to provide additional functions could be seen in other fields, but in the present invention, in contrast to those ideas, an extremely large number of elements are uniformly integrated. The purpose of the present invention is to provide a liquid crystal display element which can be easily manufactured by having necessary and desired characteristics arbitrarily designed at the design stage.

That is, the purpose of the present invention is to integrate a large number of elements on the same substrate, and not only achieve the original effects of compactness, weight reduction, and high reliability integration, but also to achieve the effect that a large number of elements can be formed with uniform characteristics. In addition to the advantages of being able to arbitrarily select desired characteristics, and being easy and inexpensive to manufacture, an integrated liquid crystal display element can be produced that cannot originally be obtained from the electro-optical properties of liquid crystal. This function is achieved without substantially increasing the volume and without making connections between a large number of terminals.

In other words, it is characterized by adding memory, characteristics, clear threshold values, etc. that were not originally possessed as a display function, operating with high reliability and precision, and being manufactured at low cost and with ease of mass production. It has characteristics.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows one of a pair of electrode substrates in a 7-segment pattern of a liquid crystal display element. Reference numeral 1 denotes a substrate, and in the present invention, a transparent substrate, particularly heat-resistant glass, is preferably used.

21-27 are lead terminals connected to display segments 31-37.

These display segments and lead terminals are Cu, Ag,
Metal film electrode such as Au, Cr, Ni, AI or In2O3
, a transparent electrode such as SnO2.

Figure 2 is a cross-sectional view of the liquid crystal display element, 1 and 5.
At least one of 2 and 4 is a transparent substrate, at least one of 2 and 4 is a transparent thin film electrode, one is configured as a 7-segment pattern as shown in Figure 1, and the other is a pattern having a conductive part in the corresponding segment part. It is formed.

3 is a spacer and liquid crystal 6 that sandwich this pair of electrodes.
It is a sealant that retains the

The liquid crystal display element can be used in combination with optical means such as a light plate, a reflector, a filter, a light diffuser, and a light source, if necessary.

7 is a power source, and AC, DC, pulse, etc. can be used.

These electro-optic modulations include optical scattering, transmittance changes,
It is displayed by changing the hue, etc., but various forms are used depending on the liquid crystal used, the orientation method of the liquid crystal, the driving voltage, the waveform, etc.

In the liquid crystal display element of the present invention, when there are a large number of lead terminals 21 to 27 as shown in FIG. It is provided so as to be electrically connected and integrally formed on the element substrate.

The film-like functional element 20 includes strip-like electrodes 11 and 11', 12 and 1
2.13 and 13' . . . The strip electrodes are provided in a continuous strip shape with the strip electrodes electrically connected to each other at intervals provided between the strip electrodes.

4A to 4D are diagrams for explaining the manufacturing procedure of a circuit having functional elements as shown in FIG. The electrode film corresponds to the electrodes 11 to 16 or 11' to 16', and the substrate 1 is made of glass or the like, and the electrode 10 is made of gold, silver, copper, aluminum, molybdenum, tungsten, etc., and is usually 100A to 5μ.
It is formed as a thin film by evaporation, sputtering, spraying, etc. of inidium oxide or tin oxide doped to obtain a predetermined conductivity.

In C, these patterns are formed by vapor deposition, electron beam etching, and masking together with the pattern of the liquid crystal display element.
It can be formed by photoetching.

In particular, with recent etching processing technology, it is possible to uniformly align the electrode spacing with high precision down to a minimum spacing of several microns.

In d, a film-like functional element 20 is formed as a film with a thickness of usually about 100A to 5μ between the strip electrodes so as to be in contact with them. It can also be formed using printing techniques that are difficult to achieve precision.

That is, a paste made by mixing the powder material of the functional element with glass frit can be shaped using a silk screen to obtain a sintered film, and as shown as a feature of the present invention, the electrode spacing can be adjusted relatively easily. In the case of a functional element whose electrical characteristics are limited depending on the electrode spacing because it is provided with high precision, the characteristics do not vary depending on the thickness direction or the part covered by the electrode, so the functional element can be relatively roughly arranged. Even if provided, it exhibits extremely high precision and reliability, which is an extremely large advantage in manufacturing.

The reason for this can be easily predicted is that the characteristics are determined by the relatively thin layer of this functional element that connects the two electrodes, and the portion covered by the electrode is large compared to the resistance value of the electrode. This is probably due to the fact that it can be ignored and is not dependent on the thickness since it is not a bulky effect.

Functional elements exhibiting such effects are not particularly limited in the present invention, but can be found in switching elements whose characteristics are exhibited by the maximum electric field between electrodes, and polymethyl methacrylate, polymethyl methacrylate, organic thin film switching elements, etc. Examples include polystyrene, polyethyl methacrylate, polybutyl methacrylate, etc.

Inorganic thin film switching elements include those known as amorphous semiconductors, such as chalcogen glass and metal oxide switching elements.

There are many examples of elements used for these, but the so-called chalcogen-based substances include ternary systems of sulfur/selenium/tellurium and binary systems using two of these, potassium arsenic, cadmium sulfide, Cadmium selenide, sulfide,
There are also antimony silicides and the like.

As the metal oxide, silicon oxide, titanium oxide, niobium oxide, vanadium oxide, aluminum oxide, tantanium oxide, etc. are used, and if necessary, a combination of these and a doping agent for improving the characteristics are used.

In particular, vanadium oxide is preferably used in the present invention.

These also use a process known as a forming process using temperature treatment or energization treatment in order to obtain the desired characteristics.

In the present invention, these functional elements are integrally formed on the substrate of the liquid crystal display element, so that the flatness and transmittance of the substrate required for the liquid crystal display element are not hindered. It also includes all methods of manufacturing functional element thin films within a limited range depending on the heat resistance of the substrate that satisfies the conditions.

[Brief explanation of drawings]

1 is a plan view for explaining the structure of an electrode substrate of a liquid crystal display element, FIG. 2 is a cross-sectional view for explaining the structure of a liquid crystal display element using the electrode substrate of FIG. 1 on one side, and 3. The figure is a plan view illustrating the structure of a functional element used in the present invention, and FIGS. 4a to 4d are sectional views illustrating a method of manufacturing a circuit having a functional element as shown in FIG. 3. 1.5...Substrate, 2,4...Electrode, 3
...Spacer, 6...LCD, 7...
...Power source, 10,1σ...Strip electrode, 11
~16,11'~16'... Strip electrode, 20.
... Functional element, 21-27 ... Lead terminal, 31-37 ... Segment electrode.

Claims (1)

[Claims] 1. One of the substrates constituting the liquid crystal display element has a plurality of strip-shaped terminal electrodes partially separated corresponding to each display segment of the liquid crystal display element, and one terminal electrode is provided between each of the separated electrodes. 1. A liquid crystal display device characterized in that the device is electrically connected by a film-like functional device formed in a continuous band shape.