Equipment and process for coating liquid crystal film on basis of TAC base material

Abstract

The invention discloses coating equipment for coating a liquid crystal film on the basis of a TAC base material. The equipment comprises a base material roller, a coating device, a constant-temperature drying box, a UV curing lamp and a finished coiled material roller, wherein the five parts form a production line; the base material roller is used for bearing the TAC base material; the coating device comprises a feeding roller, a coating roller, a coating liquid supply device and a scraper; the constant-temperature drying box is located at the output end of the coating device; the UV curing lamp is located at the output end of the constant-temperature drying box and is used for curing liquid crystals; and the finished product coiled material roller is used for winding a coated finished product. The invention further discloses a production process for coating a liquid crystal film the basis of a TAC base material by utilizing the equipment. The coating equipment and process for coatingthe liquid crystal film on the basis of the TAC base material have the advantages of simple mechanism, high coating precision and convenience in large-scale production.

Description

technical field [0001] The invention belongs to the field of optical materials, and in particular relates to a device and a process for coating a liquid crystal film based on a TAC substrate. Background technique [0002] TAC is an important material in the production process of TN-type display panels. Although in the history of the development of polarizers, as long as transparent plastics appeared, it was tried to replace TAC, but none of them could exceed the light penetration of TAC above 93%, and TAC It is a negative C-plate itself. Different formulas and degrees of esterification affect the phase difference. The current phase difference is about 30~200nm. It has a specific compensation ability for liquid crystal displays, so although TAC has a water absorption rate High, dimensional stability and surface characteristics are vulnerable to environmental influences, but none of them can be replaced by other materials. Although the TN type display has the advantages of ch...

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Problems solved by technology

[0002] TAC is an important material in the production process of TN-type display panels. Although in the history of the development of polarizers, as long as transparent plastics appeared, it was tried to replace TAC, but none of them could exceed the light penetration of TAC above 93%, and TAC It is a negative C-plate itself. Different formulas and degrees of esterification affect the phase difference. The current phase difference is about 30~200nm. It has a specific compensation ability for liquid crystal displays, so although TAC has a water absorption rate High, dimensional stability and surface characteristics are easily affected by the environment, but none of them can be replaced by other materials

Although the TN type display has the advantages of cheap price and fast response time of panel liquid crystal molecules, it also has disadvantages such as phase delay. Discotic liquid crystal molecules have always played an important role in the application of liquid crystal displays and are widely used in optical compensation film materials. Among them, it can significantly improve the viewing angle of the TN type display panel

However, the process requirements for preparing optical compensation films using discotic liquid crystal materials are relatively high, the overall preparation process is complex, the investment in coating equipment is expensive, and there are many factors affecting coating quality, which have always been the constraints for large-scale production.

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