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Retardation film and image display device provided with the retardation film

A retardation film, independent technology, applied in instruments, polarizing elements, optics, etc., can solve the problems of unstable liquid crystal orientation, high adhesion between liquid crystal and substrate, etc.

Active Publication Date: 2018-12-25
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a big problem with the adhesion between the liquid crystal and the base material, and the orientation of the liquid crystal is fundamentally unstable, causing various defects.

Method used

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  • Retardation film and image display device provided with the retardation film
  • Retardation film and image display device provided with the retardation film
  • Retardation film and image display device provided with the retardation film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7 and comparative example 1-2

[0242] The composition for liquid crystal layer formation was prepared by the composition described in following Table 1. In Table 1, the compound of chemical formula 16 (manufactured by BASF Corporation), the compound of chemical formula 17 (manufactured by Aekyung Chemical Co., Ltd.) and the chemical formula 18 (manufactured by Aekyung Chemical).

[0243] On the other hand, after the primer layer 130 was formed on the stretched COP film subjected to the plasma surface treatment (excluding Example 5 and Comparative Example 1), the above-mentioned Examples 1 to 7 were coated on the primer layer. And the composition for liquid crystal layer formation of Comparative Examples 1-2 was dried at 60 degreeC for 1 minute. Then, by exposing to light, a curing reaction is induced to produce a retardation film.

[0244] [Table 1]

[0245]

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Abstract

The present invention provides a retardation film with extremely high adhesion between layers and an image display device provided with the retardation film. The retardation film of the present invention is a retardation film having a liquid crystal layer and a primer layer joined by a chemical bond formed by at least one of hydroxyl groups and carboxyl groups on the surface of the primer layer and existing in the liquid crystal layer. It is formed by the isocyanate group and (meth)acrylate group at the end of the adhesion enhancer contained.

Description

technical field [0001] The present invention relates to a retardation film which performs alignment of a liquid crystal layer without an alignment layer and is excellent in interlayer adhesive force, and an image display device including the retardation film. Background technique [0002] In the past, CRT monitors were the mainstream of image display devices, but in recent years, with the rapid development of this technology, LCD, OLED, electronic paper, etc., have introduced a wider range of lightweight and flexible image display devices. [0003] As the most common liquid crystal display device among image display devices, liquid crystal displays with liquid crystal cells other than conventionally known TN (Twisted Nematic) mode, STN (Super Twisted Nematic) mode, VA (Vertical Alignment) mode, etc. In addition to devices, there are also known lateral electric field devices such as IPS (In-Plane Switching) mode and FFS (Fringe Field Switching) mode in which electrodes are fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30G02F1/1335
CPCG02B5/3016G02F1/13363G02F2202/28G02F1/133633G02B5/30G02F1/1335
Inventor 宋昺勋金东辉金容演
Owner DONGWOO FINE CHEM CO LTD
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