Retardation film and image display device having same

A technology of retardation film and primer layer, applied in optics, instruments, nonlinear optics, etc., can solve the problems of unstable liquid crystal orientation, large adhesion between liquid crystal and substrate, etc.

Active Publication Date: 2016-03-23
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 having same
  • Retardation film and image display device having same
  • Retardation film and image display device having same

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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PUM

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Abstract

The present invention relates to a retardation film and an image display device having the same and, more specifically, to a retardation film comprising a liquid crystal layer and a primer layer which are bonded by chemical bonding, wherein the chemical bonding is formed by a hydroxyl group and / or a carboxyl group on the surface of the primer layer and an isocyanate group and a (meth) acrylate group at the end of an adhesion-reinforcing agent included in the liquid crystal layer, such that the retardation film has a very high adhesive strength between the respective layers thereof.

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