JPH0521233U - Liquid crystal display - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims at a liquid crystal display device capable of obtaining a uniform gap in a substrate. [Structure] A glass substrate 1a having transparent electrodes 2a, 2b,
In a liquid crystal display device in which 1b are opposed to each other at a predetermined interval via a gap control material and the periphery is sealed with a sealing material 3, the glass substrates 1a and 1b and the transparent electrodes 2a and 2 are
It is characterized in that a smooth elastic film 7 is laminated between b and the gap control material bites only into the transparent electrodes 2a and 2b and the smooth elastic film 7 or the transparent electrodes 2a and 2b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid crystal display device used for a liquid crystal display element.

[0002]

[Prior Art]

 As shown in FIG. 2, a conventional liquid crystal display device of this type includes a pair of glass substrates 1a and 1b provided with transparent electrodes 2a and 2b (ITO) and an organic or inorganic alignment film 5 as an organic or inorganic substrate. The liquid crystal display element is sandwiched by an adhesive 3 which is a sealing material, the pair of glass substrates 1a and 1b are held in a constant gap via a spacer 4, and a liquid crystal 6a is injected into the gap and then sealed.

Further, due to the influence of the film thickness of the transparent electrodes 2a, 2b, a part A without the transparent electrodes 2a, 2b on both sides, a part B without the transparent electrodes 2b on one side, and a part facing the transparent electrodes 2a, 2b The gap is different from that of the (display portion), and a uniform gap cannot be obtained in the glass substrates 1a and 1b. Particularly, the vicinity of the edges of the transparent electrodes 2a and 2b has a bent shape.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, in the portions of the transparent electrodes 2a and 2b that do not face each other, a desired gap is obtained by the spacers 4 scattered on the glass substrate irrespective of the film thickness difference of the transparent electrodes 2a and 2b. Further, when sandwiched by the adhesive 3 of the sealing material, it was a usual method to apply pressure to obtain a uniform gap in the glass substrates 1a and 1b.

Therefore, in the vicinity of the transparent electrode edge in the portion A where there is no transparent electrode on both sides and the portion B where there is no transparent electrode on one side, more pressure is applied than in the portion facing the transparent electrode, and the gap becomes larger. There is a problem that it becomes a narrow and bent shape, color unevenness occurs, and the threshold voltage of the liquid crystal changes.

Further, as a result, there is a problem that a uniform gap cannot be obtained in the glass substrate and the display quality is degraded.

Therefore, the present invention has been devised in view of the above-mentioned problems of the conventional technique, and an object thereof is to provide a liquid crystal display device capable of obtaining a uniform gap in a glass substrate.

[0008]

[Means for Solving the Problems]

 To achieve the above object, in a liquid crystal display device according to the present invention, a glass substrate having a transparent electrode is opposed to a glass substrate with a gap control material at a predetermined interval, and the periphery is sealed with a sealing material. In the above method, a smooth elastic film is laminated between the glass substrate and the transparent electrode, and the gap control material is eroded only in the transparent electrode and the smooth elastic film or the transparent electrode.

[0009]

[Action]

 Since the smooth elastic film is laminated between the glass substrate and the transparent electrode, the spacer bites into the transparent electrode portion when pressure is applied, so the transparent electrode edges in the portions A and B where there is no transparent electrode maintain a gap without bending. it can.

When pressure is applied, the spacer digs into the transparent electrode facing portion C, but when the spacers of the portions A and B without the transparent electrode reach the gap between the upper and lower glass substrates, the transparent electrode facing portion C The C spacer saturates while biting into the transparent electrode, and as a result, a uniform gap is obtained in the entire glass substrate.

Further, color unevenness is eliminated in the portion C where the transparent electrode exists and the other portions A and B.

Further, since the smooth elastic film causes the spacer to bite into the transparent electrode portion, the flat elastic film, and the front side of the glass substrate, a uniform gap can be obtained.

[0013]

【Example】

 An embodiment will be described with reference to FIG. 1. In the present invention, a smooth elastic film 7 is laminated on a pair of glass substrates 1a and 1b, and a transparent electrode (ITO) 2a is formed on the smooth elastic film 7. 2b are stacked. That is, the smooth elastic film 7 is laminated between the glass substrates 1a and 1b and the transparent electrodes 2a and 2b.

A pair of substrates 1a and 1b, each having an alignment film 5 for aligning the liquid crystal 6 on the transparent electrodes 2a and 2b, are sandwiched and adhered by an adhesive 3 as a sealing material, and a gap maintaining gap is formed. This is a liquid crystal display element in which the spacers 4 of the up control material are scattered to keep the insides of the glass substrates 1a and 1b at uniform gaps. Therefore, the C portion is formed in three layers, the B portion is formed in two layers, and the A portion is formed in one layer.

The smooth elastic film 7 is made of an acrylic, imide or PVA organic polymer film.

The smooth elastic film 7 is laminated by applying a printing method, spinner coating, dipping or the like.

Further, depending on the film quality of the smooth elastic film 7, it is possible to make the gap control material bite into both the transparent electrodes 2a and 2b and the smooth elastic film 7 and to make the gap control material bite only into the transparent electrodes 2a and 2b. You can choose either.

I. When the gap control material is eroded into both the transparent electrodes 2a and 2b and the smooth elastic film 7, in general, when the transparent electrodes 2a and 2b are provided on the glass substrates 1a and 1b, the gap control material is Although it does not bite, the gap control material bites into the transparent electrodes 2a and 2b by providing the smooth elastic film 7 between the transparent electrodes 2a and 2b and the glass substrates 1a and 1b.

Ii. When the gap control material is allowed to bite only into the transparent electrodes 2a and 2b, the gap control material bites into the transparent electrodes 2a and 2b by providing the smooth elastic film 7 on the base as shown in the above i. And by setting the film quality of the underlayer to an appropriate value (it is thought that it will be harder than in case i), the gap control material is supported on the surface of the smooth elastic film 7 and Get uniform gaps throughout.

In an actual cell, an alignment film 5 made of polyimide or the like is formed on the transparent electrodes 2a and 2b. However, since the spacer 4 bites into the alignment film 5, the alignment film 5 is formed. Even if it exists, it is safe to assume that the above phenomenon will occur.

[0021]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects.

I. Depending on the film thickness difference of the transparent electrode, the gaps are different between the portions A and B without the transparent electrode and the portion C facing the transparent electrode. However, in the present invention, since the smooth elastic film is laminated between the transparent electrodes, the gap control material is used. When the spacers of FIG. 6 dig into the transparent electrode portion during pressurization, the transparent electrode edges of the portions A and B without the transparent electrode can hold the gap without bending (see FIG. 1).

Ii. Also, when pressure is applied, the spacer of the gap control material digs into the transparent electrode at the confronting portion C of the transparent electrode, but when the spacers of the portions A and B without the transparent electrode reach the gap between the upper and lower glass substrates, The spacer at the electrode facing portion C saturates while biting into the transparent electrode. Therefore, the result is a uniform gap throughout the glass substrate.

Iii. By obtaining a uniform gap, color unevenness is eliminated in the portion C where the transparent electrode is present and the portions A and B other than that. Therefore, the display quality can be improved.

Iv. Further, since the smooth elastic film causes the spacer to bite into the transparent electrode portion or even before the smooth elastic film and the glass substrate, a uniform gap can be obtained.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of a conventional liquid crystal display device.

[Explanation of sign]

 1a Glass substrate 1b Glass substrate 2a Transparent electrode 2b Transparent electrode 3 Adhesive 4 Spacer (gap control material) 5 Alignment film 6 Liquid crystal 7 Smooth elastic film

Claims (1)

[Scope of utility model registration request] 1. A liquid crystal display device in which a glass substrate having a transparent electrode is opposed to each other with a gap control material at a predetermined interval and the periphery is sealed with a sealing material. A liquid crystal display device, wherein films are laminated, and the gap control material bites only into the transparent electrode and the smooth elastic film or the transparent electrode.