JPS6378129A - Liquid crystal display panel - Google Patents

Abstract

PURPOSE:To obtain the titled panel capable of forming simply a uniform film, even in case of forming the oversized titled panel and to enable forming an orientation film having a prescribed size by merely cutting the sheet, by sticking and forming a sheet-like film contg. an org. high polymer as an orientation film. CONSTITUTION:The strip-likely divided electrodes are formed on the surface of the pair of the transparent substrates which are in contact with the liquid crystal to form the substrates 23 and 24 mounted the upper and lower electrodes thereon respectively. Next, the polyimide solution capable of cross-linking at a low temp. is applied on the polyethylene-terephthalate (PET) by a blade method to form a sheet in a semi- cured state, followed by sticking the obtd. sheet on said substrates 23 and 24 by means of a laminator, and by stripping PET and effecting a heat-treatment of the obtd. substrates to form the orientation film 25. Subsequently, a spacer 26 composed of glass fibers or fine particles of a resin is sprayed for example, on the substrate 24, followed by sticking the substrates 23 and 24 at the environs of the panel with each other. The liquid crystal composition 27 is filled into the space formed by the spacer between the substrates. Linearly polarizing plates 21 and 22 are stuck on the outsides of the both substrates.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a large liquid crystal display panel with high performance and high yield.

BACKGROUND OF THE INVENTION In recent years, liquid crystal display devices have been actively approached for large-capacity displays, particularly image displays, and are attracting attention as displays that can be used to realize low-cost devices. An example of the conventional liquid crystal display device mentioned above will be described below with reference to the drawings.

FIGS. 2 and 3 are diagrams showing the structure of a matrix type liquid crystal display device, which is an example of a conventional liquid crystal display device.

After forming the electrode groups 3 and 4 divided into strips and the alignment film 5 on the surfaces of the pair of transparent groups II and 2 that are in contact with the liquid crystal, glass fibers or fine resin particles are scattered, spacers 6 are provided, and the electrodes 3 and 4 are formed. 0 or more, in which the substrates are bonded so as to face each other orthogonally, the liquid crystal composition 7 is filled in the gap formed by the spacer, and the linearly polarized light 18.9 is bonded to the outside of both substrates. The liquid crystal display device was divided into each one! Each intersection of the electrode groups 3 and 4 forms a picture element 10, and arbitrary information can be displayed by selectively applying a voltage to these electrode groups. .

Problems to be Solved by the Invention With the increasing size of liquid crystal display panels, it has become extremely difficult to form a uniform film by conventional spin coating or printing methods. In addition, in order to obtain liquid crystal display panels of different sizes, appropriate equipment and jigs are required, and in order to obtain good-looking, high-quality liquid crystal display panels, there are not only issues of yield and cost amplifier. This also led to a significant deterioration in work efficiency. Therefore, the present invention makes it possible to easily form a uniform coating even when the size of the liquid crystal display panel increases or even when the panel size differs.
The purpose is to easily obtain a high-quality liquid crystal display panel free from defects such as display unevenness.

Means for Solving the Problems In order to solve the above-mentioned problems, the liquid crystal display panel of the present invention has a sheet-like organic polymer film adhesively formed thereon to serve as an alignment film.

The present invention has the above-described structure, so that even when the liquid crystal display panel becomes large, it is possible to easily form a uniform coating, and to obtain a uniform, even, high-quality liquid crystal display panel, and even when the size of the liquid crystal display panel is different. Even in the case of liquid crystal display panels, it is possible to form an alignment film of any size by simply cutting the sheet, which not only improves yield and lowers costs, but also greatly improves work efficiency.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figure 1, 21.22 are upper and lower polarizing plates, 23.24
25 is a substrate with upper and lower electrodes, 25 is an alignment film, 26 is a spacer, 27 is a liquid crystal composition, and 28 is a reflective plate, and electrode groups divided into strips are formed on the surfaces of the pair of transparent substrates that are in contact with the liquid crystal. The substrate with upper and lower electrodes 23 and 24 is 0.
Next, a low-temperature cross-linked polyimide solution is applied onto polyethylene terephthalate (PET) using a blade method, semi-cured to obtain a sheet, which is pasted on a substrate with upper and lower electrodes 23 and 24 using a laminator, and the PET is peeled off and heat treated. Then, an alignment film 25 is formed. After that, spacers 26 made of glass fiber or resin particles are scattered, for example, on the substrate 24, and then the substrates 23 and 24 are bonded around the panel, and the liquid crystal composition 27 is placed in the gap formed by the spacers.
is filled, and linear polarizing plates 21 and 22 are bonded to the outside of both substrates. Further, when the liquid crystal display panel has a reflective structure, a reflective plate 28 is provided outside the lower polarizing plate 22. The substrates 23 and 24 with upper and lower electrodes have electrodes formed on opposing surfaces, and the surface of the alignment film 25 has been subjected to a predetermined alignment treatment, for example, by a method such as rubbing.

Effects of the Invention As described above, the present invention makes it possible to easily form a uniform film even when the size of the liquid crystal display panel becomes large, by adhesively forming a sheet-like organic polymer film as an alignment film, and moreover, it is possible to easily form a uniform film even when the size of the liquid crystal display panel increases. In the case of liquid crystal display panels, alignment films of any size can be formed simply by cutting sheets, so there is no need for related arrangements or jigs, and the yield of high-quality liquid crystal display panels with no defects such as display unevenness can be achieved. Not only can it be obtained at low cost, but it can also greatly contribute to improving work efficiency, and its practical effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a liquid crystal display panel according to an embodiment of the present invention.
FIGS. 2 and 3 are configuration diagrams of conventional liquid crystal display panels. 21... Upper deflection plate, 22... Lower deflection plate, 23... Upper electrode-attached substrate, 24...
... Substrate with lower electrode, 25 ... Polymer alignment film, 26 ... Spacer, 27 ... Liquid crystal composition, 2B ... Reflection plate.

Claims (1)

[Claims] A pair of substrates with electrodes, at least one of which is transparent, are arranged so that their electrode surfaces face each other, a spacer of a predetermined diameter is used to maintain a gap between the substrates, the periphery is sealed with an adhesive, and then This liquid crystal display panel is formed by filling this gap with a liquid crystal composition, and is characterized in that a sheet-like organic polymer coating is adhesively formed on an alignment film that regulates the alignment of liquid crystal molecules.