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Optical film, optical diaphragm and liquid display module

A technology of optical film and optical sheet, applied in optics, optical components, nonlinear optics, etc., can solve problems such as difficult to display images, achieve excellent optical characteristics, improve optical uniformity, and suppress phase difference changes

Inactive Publication Date: 2012-10-17
KEIWA INCORPORATED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there is a problem that in a liquid crystal display module provided with an optical sheet using the above-mentioned resin in the base material layer, it is difficult to display an image finely as the liquid crystal display becomes larger and thinner.

Method used

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  • Optical film, optical diaphragm and liquid display module
  • Optical film, optical diaphragm and liquid display module
  • Optical film, optical diaphragm and liquid display module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Using a cyclic olefin copolymer ("TOPAS 8007" manufactured by Polyplastics Co., Ltd.), after pre-drying, it was melt-extruded on a cooling roll using a single-screw extruder (L / D=35), and the thickness was produced using a drawing device. 100μm optical film.

Embodiment 2

[0105] The optical film produced in Example 1 was subjected to ITO treatment by sputtering to produce an optical sheet (transparent conductive sheet) having a transparent conductive layer on one surface of the optical film.

Embodiment 3

[0107] On the optical film produced by Example 1, a hard coat agent ("Ultraviolet UV-7605B" manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was applied to make the film thickness of the hard coat layer 5 μm, and it was cured to produce An optical sheet (hard coat film) having a hard coat layer on one side of the optical film was obtained.

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Abstract

The present invention aims to providing an optical film, an optical diaphragm and a liquid display module, which are small in phase difference change caused by an external force and excellent in optical uniformity, and can by used for displaying a subtle image, wherein the optical film comprises a cycloolefin copolymer as a main component, the photoelastic coefficient of the optical film is preferably lower than 10*10-12 / Pa, the average thickness of the optical film is preferably higher than 10 microns and lower than 500 microns, the absolute value of the phase difference value (Re) of the optical film is preferably lower than 50 nm, the optical diaphragm comprises a transparent conductive layer, a hard coating layer, a light diffusion layer or a prism layer on one surface of the optical film, and the liquid display module is provided with the optical diaphragm.

Description

technical field [0001] The present invention relates to an optical film, an optical sheet and a liquid crystal display module with small phase difference change due to shrinkage stress and excellent optical uniformity. Background technique [0002] Liquid crystal display modules (LCD) are mostly used as flat-panel displays due to their thinness, lightness, and low power consumption. They are used as information display devices such as mobile phones, personal digital assistants (PDAs), personal computers, and televisions. expand. In recent years, depending on the application, various characteristics are required for liquid crystal display modules, such as brightness (higher brightness), ease of viewing (wider viewing angle), energy saving, thinner and lighter, and larger screens. Wait. [0003] The liquid crystal display module generally has the following structure: a liquid crystal display element, various optical sheets and a backlight are stacked sequentially from the fr...

Claims

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Application Information

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IPC IPC(8): G02B1/04G02B1/10G02B5/02G02B5/04G02F1/1335G02B5/30
CPCC08J5/18C08L45/00G02B1/04G02B5/04G02F1/13
Inventor 古田旭峯尾裕
Owner KEIWA INCORPORATED
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