JP2000221516A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device high in reliability and high in production yield without causing any short circuit. SOLUTION: This liquid crystal display device 15 is produced by preparing a scanning substrate 7 by successively depositing a color filter 4, a transparent electrode 5 and an alignment layer 6 on a glass substrate 2, preparing a signal substrate 11 by successively depositing a transparent electrode 8 and an alignment layer 16 on a glass substrate 3, then laminating the two substrates with a sealing member 11 containing a large number of conductive particles, and sealing a liquid crystal layer between the substrates. The alignment layer 16 is extended to the sealing member 11 so that the alignment layer 16 is present between the electrode extended part 8a and the sealing member 11 to prevent short circuit of the adjacent electrode extended part 8a (transparent electrode 8).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement in a liquid crystal display device.

[0002]

2. Description of the Related Art A scanning side substrate and a signal side substrate each having a transparent electrode formed on a glass substrate and an alignment film formed thereon are disposed facing each other at a predetermined interval with a liquid crystal layer interposed therebetween.
2. Description of the Related Art A liquid crystal display device has been proposed in which a seal member including a large number of conductive particles is formed along the outer periphery of a substrate.

This liquid crystal display will be described with reference to FIGS. 9 and 10. FIG. FIG. 9 is a schematic sectional view of the liquid crystal display device 1 for color display, and FIG. 10 is a plan view of a main part thereof. A color filter 4, a transparent electrode 5, and an alignment film 6 are sequentially laminated on a glass substrate 2 to form a scanning substrate 7, and a transparent electrode 8 and an alignment film 9 are sequentially laminated on the glass substrate 3 to generate a signal. Substrate 1
When the scanning substrate 7 and the signal substrate 10 are bonded to each other, a large number of electrodes are arranged in a stripe pattern on the transparent electrode 5 and the transparent electrode 8. Make an area. Then, a seal member 11 is provided around the substrate. The seal member 11 includes a large number of conductive particles (such as Au pearl) and further includes a spacer. In addition, a spacer 12 is provided to keep the scanning substrate 7 and the signal substrate 10 at a constant interval.

FIG. 10 shows a main part of a signal substrate 10, and a conductive member 1 is provided on a glass substrate 3 outside a seal member 11.
3, the transparent electrode 5 on the glass substrate 2 is extended to the sealing member 11 so that the transparent electrode 5, the sealing member 11, and the conductive member 13 are energized.

According to the liquid crystal display device 1 having the above-described structure, both the scanning electrode and the signal electrode are provided on the glass substrate 3 by providing the sealing member 11 with conductivity.

[0006]

However, since the liquid crystal display device 1 is for color display, one pixel is composed of three pixels of red, green and blue, and the transparent electrode 8 for signal is used.
Is about 1/3 of the width of the scanning transparent electrode 5, the interval between the transparent electrodes 8 is also reduced, and the seal member 11
There is a problem that the conductive particles are interposed, and the conductive particles are aggregated, thereby causing an electrical short circuit.

The problem is not only for color display,
The same applies to the case where the width of the transparent electrode is increased and the interval between the transparent electrodes is reduced to increase the aperture ratio.

Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a highly reliable liquid crystal display device which eliminates the above-mentioned short circuit and improves the production yield. .

[0009]

The liquid crystal display device of the present invention comprises two transparent substrates A and B in which a transparent electrode pattern in which a plurality of transparent electrodes are arranged in parallel and an alignment film are sequentially laminated.
Are arranged via a liquid crystal layer so that both transparent electrode patterns intersect, a sealing member containing a large number of conductive particles is sealed around the substrate between the two transparent substrates, and a transparent electrode pattern on the transparent substrate A is provided. Is electrically connected to the conductive member for external conduction formed on the transparent substrate B via the sealing member, and an electrode extending portion is provided in which the transparent electrode pattern on the transparent substrate B is extended to the periphery of the substrate through the sealing member. Further, in a configuration in which a dummy portion is provided at a position on the surface of the transparent substrate A facing the electrode extension portion via the seal member, an area including a portion where the seal member is disposed on the dummy portion or the electrode extension portion Is coated with an alignment film.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device according to the present invention will be described with reference to FIGS. 1 is a schematic cross-sectional view of the liquid crystal display device 15, FIG. 2 is a plan view of a main part thereof, FIG. 3 is a cross-sectional view taken along line XX of FIG. 2, FIG. 4 is a plan view of a transparent substrate B, and FIG. FIG. 6 is a longitudinal sectional view along the seal member of both transparent substrates A and B bonded together via the seal member. FIG. 7 is a plan view of a transparent substrate B in another liquid crystal display device, and FIG. 8 is a plan view of the transparent substrate A in another liquid crystal display device as viewed from the back side. The same parts as those of the conventional liquid crystal display device 1 are denoted by the same reference numerals.

The liquid crystal display device 15 includes a scanning substrate 7 in which a color filter 4, a transparent electrode 5, a dummy portion 5a, and an alignment film 6 are sequentially laminated on a glass substrate 2 as the transparent substrate A; A signal substrate 10 in which a transparent electrode 8 and an alignment film 16 are sequentially laminated on a glass substrate 3 as B
a is adhered with a seal member 11 so that the transparent electrode 5 and the transparent electrode 8 intersect, a rectangular display area is formed in the seal member 11, and the liquid crystal layer is sealed in the display area.

The seal member 11 is made of an epoxy-based or acrylic resin containing a large number of conductive particles such as Au pearls (resin spheres whose surface layer is electrolessly Au plated) and spacers (glass spheres, glass columns, silica fine particles, plastic spheres, etc.). And a sealant made of a thermosetting resin such as a silicone-based resin or a UV-curable resin, whereby the scanning side substrate 7 and the signal side substrate 10a are adhered at a predetermined interval, and A space is provided by positioning, and the sealant is heated or UV-irradiated and cured to form the seal member 11. In addition, the transparent electrode 5 on the glass substrate 2 is extended to the seal member 11, and a current is applied between the transparent electrode 5, the seal member 11, and the conductive member 13. And by extending the conductive member 13 to the outside of the seal member 11, it becomes a terminal for external input / output,
Connected to TAB or the like.

In such a configuration, as shown in FIG. 4, the alignment film 16 is extended to the seal member 11 along the direction in which the transparent electrodes 8 are arranged, and an electrode extension 8a is provided. The electrode extending portion 8a extends the transparent electrode 8 to the outside of the seal member 11 to serve as an external input / output terminal, and is connected to TAB or the like.

Thus, according to the liquid crystal display device 15 of the present invention, in the manufacture thereof, the scanning substrate 7 and the signal substrate 10 are used.
a are aligned and bonded, a suitable pressure is applied, the sealing member 11 is cured, and a liquid crystal material is injected and sealed. The electrode pattern may be slightly shifted between the substrates. However, since the alignment film 16 is extended to the seal member 11, the alignment film 16 is located between the electrode extending portion 8a and the seal member 11 as shown in FIG.
This prevents the adjacent electrode extension portion 8a (transparent electrode 8) from short-circuiting through the dummy portion 5a. In the drawing, reference numeral 11a denotes conductive particles contained in the sealing member 11.

FIGS. 7 and 8 show another liquid crystal display device 15a of the present invention. In the liquid crystal display device 15, the alignment film 16 extends between the electrode extending portion 8a and the sealing member 11, but instead the alignment film 6 on the scanning substrate 7 extends over the dummy portion 5a. It may be extended.

It should be noted that the present invention is not limited to the above embodiment, and various changes and improvements may be made without departing from the spirit of the present invention. In the above-described embodiment, the alignment film 6 and the alignment film 16 are continuously extended to the seal member 11, but instead of this, the dummy member 5a and the seal member 11 of the electrode extension portion 8a are provided. The alignment film may be coated only on the portion where the alignment is performed.

[0017]

As described above, according to the liquid crystal display device of the present invention, two transparent substrates A and B in which a transparent electrode pattern and an alignment film are sequentially laminated are arranged such that both transparent electrode patterns intersect. And a sealing member containing a large number of conductive particles is sealed, and the transparent electrode pattern on the transparent substrate A is electrically connected to the externally conductive conductive member on the transparent substrate B via the sealing member. An electrode extending portion in which the transparent electrode pattern on the transparent substrate B is extended to the periphery of the substrate through the sealing member; and a dummy portion is provided at a position on the transparent substrate A surface facing the electrode extending portion via the sealing member. In addition, by forming a film of the same material as the alignment film on the portion where the sealing member is provided on the dummy portion or the electrode extension portion, short-circuiting between adjacent electrode extension portions can be prevented. To increase production yield As a result, it was provided a liquid crystal display device of high reliability and low cost.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a liquid crystal display device of the present invention.

FIG. 2 is a plan view of a main part of the liquid crystal display device of the present invention.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a plan view of a transparent substrate B in the liquid crystal display device of the present invention.

FIG. 5 is a plan view seen from the back side of a transparent substrate A in the liquid crystal display device of the present invention.

FIG. 6 shows two transparent substrates A in the liquid crystal display device of the present invention;
It is a longitudinal section along the seal member in B.

FIG. 7 shows a transparent substrate B in another liquid crystal display device of the present invention.
FIG.

FIG. 8 shows a transparent substrate A in another liquid crystal display device of the present invention.
FIG. 4 is a plan view as viewed from the back side of FIG.

FIG. 9 is a schematic sectional view of a conventional liquid crystal display device.

FIG. 10 is a plan view of a main part of a conventional liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 15, 15a Liquid crystal display device 2, 3 Glass substrate 4 Color filter 5, 8 Transparent electrode 5a Dummy part 6, 9 Alignment film 7 Scanning substrate 8a Electrode extension part 10, 10a Signal substrate 11 Seal member 12 Spacer 13 Conductive material

Claims (1)

[Claims] 1. A liquid crystal layer comprising: two transparent substrates A and B in which a transparent electrode pattern in which a plurality of transparent electrodes are arranged in parallel and an alignment film are sequentially laminated; A sealing member containing a large number of conductive particles is sealed around the substrate between the transparent substrates, and a transparent electrode pattern on the transparent substrate A is formed on the transparent substrate B via the sealing member. An electrode extending portion is provided, which is electrically connected to a conductive member for energization, and has an electrode extending portion formed by extending a transparent electrode pattern on the transparent substrate B to the periphery of the substrate through a sealing member. A liquid crystal display device having a dummy portion at a position on a surface A, wherein the alignment film is coated on a region including a portion where a seal member is provided on the dummy portion or on an electrode extension portion. Liquid crystal characterized by Display devices.