JPS6294825A - Module for liquid crystal display - Google Patents

Abstract

PURPOSE:To reduce the size of a module for liquid crystal display by installing an external circuit device in a hole part formed in a cell for liquid crystal display on the basis of the through hole of an electrode substrate. CONSTITUTION:Two electrode substrates 2 and 2 which have a transparent electrode pattern on one surface of a base material and also has an oriented film for orienting liquid crystal thereupon are arranged while having their electrode pattern sides opposite each other. Then the module consists of the liquid crystal display cell 1 formed by charging liquid crystal 4 between the substrates 2 and 3 through a seal material 5 and a liquid crystal driving circuit device 6 as the external circuit device. This substrate 2 has the through hole 2 at its center part and the cell 1 has the hole part 1' in the center on the basis of the hole 2. End parts of the transparent electrode patterns forming the terminal part of the cell are led out to the inner edge part of the hole part 1'. Consequently, the position of the external circuit device installed at the hole part 1' to the cell is fixed securely.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to forming a liquid crystal display cell using an electrode substrate having a through hole, thereby forming a hole in the cell, and inserting an external circuit device into the hole. The present invention relates to a liquid crystal display module that can be installed to make the module smaller and thinner, and that improves the reliability of circuit connections.

BACKGROUND ART AND PROBLEMS Conventionally, as a liquid crystal display module, there has been known a module in which a terminal portion drawn out from the outer edge of a liquid crystal display cell is connected to a liquid crystal driving circuit device.

However, in this type of liquid crystal display module, (1) the lead part for forming the terminal part drawn out from the central part of the cell and the part away from the outer edge becomes long, making the lead wiring complicated; (2) Connections with external circuit devices using anisotropic connectors, etc. at the outer edge are likely to be destroyed by photography, etc., and the reliability of the connections is poor. , (3) There is little freedom in selecting the cell form due to connection with external circuit devices, for example, it is difficult to fashion the cell form;
(4) There was a question that the liquid crystal immersion cell and the external circuit device are located in parallel, making it difficult to downsize them.

Means for Solving the Problems The present invention makes it possible to overcome the above problems by forming a hole in a liquid crystal display cell using a special electrode substrate and installing an external circuit device in the hole. This is what I did.

That is, the present invention provides a liquid crystal display cell which is constructed using at least one electrode substrate having through holes in the thickness direction inside and/or at the outer edge, and in which liquid crystal is sealed between a plurality of electrode substrates. t) provides a liquid crystal display module comprising an external circuit device installed in a hole in a liquid crystal display cell formed based on the through hole of the electrode substrate;

A hole is formed in the liquid crystal display cell based on the through hole in the thickness direction of the working electrode substrate, and by installing an external circuit device in this hole, the space occupied by the liquid crystal display module is narrowed. Furthermore, it becomes possible to form a cell terminal portion for connection to an external circuit device by using the hole portion.

Example An embodiment of the present invention is shown in FIG. 2.

This consists of two electrode substrates 2.3 each having a transparent electrode pattern on one side of the base material and an alignment film (none of which is shown) for aligning the liquid crystal thereon, with the electrode pattern sides facing each other. It consists of a liquid crystal display cell 1 in which a liquid crystal 4 is sealed between electrode substrates 2.3 via a sealing material 5, and a liquid crystal driving circuit device 6 as an external circuit device.

The electrode substrate 2 is provided with a through hole 2' in its center, and based on this through hole, the liquid crystal display cell 1 has a hole 1° in its center. An end portion of a transparent electrode pattern forming a terminal portion of the cell is drawn out from the inner edge of this hole l′. Further, a circuit board 6a is provided in the hole 1'.
A liquid crystal driving circuit device 6 consisting of an IC chip 6b and an IC chip 6b is installed. The terminal extension portion 2a of the electrode substrate 2 and the terminal extension portion 3a of the electrode substrate 3 are each connected to a liquid crystal driving circuit device 6.

Note that 7 is a resin for sealing the liquid crystal driving circuit device, but there are also methods in which the liquid crystal driving circuit device also serves as a sealing material, resin injected into the hole space of the cell for the purpose of reinforcement or decoration, etc. It may also be used as a method that also serves as a sealing method, but it is not essential. Further, 8 is a reflecting plate installed as necessary, but it may be a semi-transmissive reflecting plate or the like.

On the other hand, as shown in FIG. 3, the liquid crystal driving circuit device 6 may be sandwiched between electrode substrates 2.3. In this case, the connection between the liquid crystal driving circuit device 6 and the terminal extending portion 2as of the electrode substrate 2 and the terminal extending portion 3a of the electrode substrate 3 in the liquid crystal display cell is made through, for example, a through hole or the like. Part 6c is performed. The terminal section 6c is also connected to other devices as necessary.

Note that the other symbols are the same as in the above embodiment.

In the present invention, the base material for the electrode substrate is not limited, but generally includes a glass plate, a plastic film or plate, or a laminate using these alone or in combination. Furthermore, there are no particular limitations on the materials, formation methods, etc. of the transparent electrode and alignment film provided on the base material, and known ones may be applied. As the sealing material, epoxy resin, silicone resin, polyester resin, etc. are generally used, but the sealing material is not limited to these. Historically, a printed circuit board based on a thin plate-like material such as a plastic film is usually used as the circuit board in the liquid crystal driving circuit device of the above embodiment. On the other hand, when arranging the electrode substrates to face each other, a particulate or fibrous spacer may be interposed to improve the gap accuracy between the electrode substrates.

In the present invention, there are no particular limitations on the size, shape, number, or arrangement of the through holes in the quadrupole substrate for forming the holes of the liquid crystal display cell.

Therefore, the n through hole may be located inside the electrode substrate and the edge of the through hole forms a closed curve, or it may be located at the outer edge of the electrode substrate and the edge of the through hole is continuous with the outer edge of the electrode substrate. It may be something that does. Further, both the inside and the outer edge of the electrode substrate may each have one or more through holes.

On the other hand, in the liquid crystal display cell of the present invention, only one of the plurality of electrode substrates used may have a through hole as in the embodiment, or two or more or all of the electrode substrates may have a through hole. It may be something that you have.

Alternatively, the through-holes in the plurality of electrode substrates may be located at corresponding positions on the cell, so that the hole portion of the cell becomes a through-hole state, such as in t).

In the liquid crystal display module of the present invention, the external circuit device installed in the hole of the liquid crystal display cell is not limited to the liquid crystal driving circuit device of the type described in the embodiment, but may be any other type of liquid crystal driving circuit device. It may also be a device having other functions.

Effects of the Invention According to the present invention, since an external circuit device is installed in the hole (space) formed in the liquid crystal display cell based on the through hole of the electrode substrate, the liquid crystal display module can be miniaturized. .

Further, it becomes possible to provide a terminal extension portion of the electrode substrate in the hole portion of the liquid crystal display cell. As a result, it becomes possible to more reliably fix the position of the external circuit device installed in the hole with respect to the liquid crystal display cell, thereby increasing the stability and reliability of the connection between the liquid crystal display cell and the external circuit device. It is possible to improve the Furthermore, it is possible to centralize or decentralize the terminal section, shorten the lead section, simplify lead wiring, reduce the incidence of defects such as disconnections, and expand the selection range of cell configurations. It becomes possible.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of an embodiment of a liquid crystal display module of the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a side sectional view of a main part of another embodiment. 1.Liquid crystal display cell 1': hole 2.3'electrode substrate 2'2 through holes 2a, 3a: terminal drawer section 4: liquid crystal 5: sealing material 6; liquid crystal drive circuit device 6a: circuit board 6b: IC Chip 6c: Terminal part 7: Sealing resin 8; Reflector patent applicant Nitto Electric Industry Co., Ltd. Agent Tsutomu Fujimoto 1st
figure

Claims (1)

[Claims] 1. For a liquid crystal display in which liquid crystal is sealed between a plurality of electrode substrates, which is constructed using at least one electrode substrate having through holes in the thickness direction inside and/or at the outer edge. A liquid crystal display module comprising a cell and an external circuit device installed in a hole in the liquid crystal display cell formed based on the through hole of the electrode substrate. 2. The module according to claim 1, wherein the liquid crystal display cell has a terminal pull-out portion in its hole to be connected to an external circuit device. 3. The module according to claim 1, wherein the external circuit device is a liquid crystal driving circuit device.