JPH035718A - Manufacture of plastic liquid crystal display element - Google Patents

Abstract

PURPOSE:To improve the process flowability and to obtain the extremely-thin liquid crystal display element by providing a process for laminating high polymer resin which forms a plastic substrate on a releasing film, a process wherein the resin flows while laminated on the releasing film, and a process wherein the releasing film is peeled. CONSTITUTION:A polycarbonate film of about 100mum is used as a plastic film which forms a base body 3 and coated with silicone-based resin as a releasing agent 2. Further, a film which forms the substrate 1 of the plastic liquid crystal display element is formed thereupon by coating or laminating. A liquid crystal cell which is assembled is cut to specific size by using a shear ring, then, liquid crystal is injected. The liquid crystal flows together with the polycarbonate film as the body 3 and while the plastic liquid crystal display element is complet ed, the polycarbonate film as the body 3 is peeled. Consequently, the process flowability is improved and the extremely thin, lightweight liquid crystal display element is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a plastic liquid crystal display element.

[Conventional technology]

The conventional manufacturing method for plastic liquid crystal display elements is to manufacture plastic liquid crystal display elements by flowing a single plastic film, which serves as the substrate of the plastic liquid crystal display element, in the form of a sheet or continuously flowing and processing it in the form of a roll. Ta.

[Problem to be solved by the invention]

However, the method for manufacturing plastic liquid crystal display elements described above has the problem that it is difficult to flow a film of 50 μm or less in terms of handling and mechanical strength because it is flowed in sheets or rolls, and there is a limit to the thickness. Was.

Therefore, the present invention has been made to solve these conventional problems, and improves process fluidity, and furthermore,
A method for manufacturing a plastic liquid crystal display element that yields an ultra-thin plastic liquid crystal display element is defined as ``1''.

[Lesson; Means to solve j]

The method for manufacturing a plastic liquid crystal display element r of the present invention is a method for manufacturing a plastic liquid crystal display element in which a liquid crystal layer is sandwiched between plastic substrates on which electrodes are formed, and a polymer resin serving as the plastic substrate is placed on a release film. It is characterized by comprising a step of laminating, a step of flowing while laminated on the release film, and a step of peeling off the release film.

[Implementation example 1] First, explanation will be given using FIG. 1.

Approximately 100
A .mu.m polycarbonate film is used, and a silicone resin is applied as a mold release agent 2 onto the film. Furthermore, a film that will become the substrate 1 of the plastic liquid crystal display element is uniformly coated or laminated thereon. In this example, the substrate 1 was assembled and coated with phenoxy resin to form a film of about 40 μm. Next, a transparent conductive film of indium tin oxide having a thickness of about 500 nm is formed on the support 3 by low-temperature sputtering, and electrodes are formed by photolithography. Further, an alignment agent is applied to both substrates, and the substrate is fired and then subjected to an alignment treatment.

Next, after screen printing an epoxy sealant and an upper and lower conductive agent, glass fiber was sprinkled on the film surface, and both substrates were combined and the sealant was cured by heating.

The assembled liquid crystal cell is cut into a predetermined size using a yarn ring, and then liquid crystal is injected (see FIG. 2). Up to this point, the polycarbonate film of the support 3 was peeled off in this state where it had flowed together with the polycarbonate film of the support 3 and a plastic liquid crystal display element was completed. This step includes a heating step of heating and curing the seal, so if this is used to change the thermal expansion coefficients of the substrate 1 and the support 3, the support 3 will be easily peeled off.

[Example 2] Similar effects were also obtained when the film used for the support was changed to a polyethylene film such as polyethylene terephthalate or a polysulfone thermoplastic film such as polyethersulfone instead of polycarbonate film. .

[Example 3] A similar effect was also obtained by laminating a film of about 40 μm on a support coated with a release agent and allowing it to flow. In addition to the above phenoxy resin, polyethylene resins such as polyethylene terephthalate and polyethylene resins such as polyether sulfone are suitable for the substrate film of the liquid crystal cell to be coated or laminated.

〔Effect of the invention〕

As described above, according to the present invention, a film serving as a substrate of a plastic liquid crystal display element is laminated or coated on a plastic film support, and the film is flowed through the process and finally peeled off, thereby producing a liquid crystal display using a film substrate of 50 μm or less. This has the effect of making it possible to manufacture an ultra-thin and lightweight plastic liquid crystal display element.

FIG. 4 is a cross-sectional view of a conventional substrate film.

·substrate ·Release agent ・Support ・Transparent conductive film ・Liquid crystal layer ・Alignment film ・Seal material ・Substrate film that's all

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a structure in which a substrate film used in the present invention is coated or laminated on a support. FIG. 2 is a cross-sectional view showing the liquid crystal cell after liquid crystal injection in Example 1. FIG. 3 is a cross-sectional view of the liquid crystal cell with the support removed.

Claims (1)

[Claims] In a method for manufacturing a plastic liquid crystal display element in which a liquid crystal layer is sandwiched between plastic substrates on which electrodes are formed, a step of laminating a polymer resin to become the plastic substrate on a release film, a state in which it is laminated on the release film. 1. A method for producing a plastic liquid crystal display element, comprising: a step of flowing the liquid crystal display element with a mold, and a step of peeling off a release film.