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Phase difference control member, liquid crystal display, phase difference layer forming liquid crystal material composition

A retardation layer and control component technology, applied in the direction of instruments, optical elements, polarizing elements, etc., can solve the problems of protective film retardation, light leakage, increase in the number of liquid crystal display film materials, etc., achieve a wide viewing angle and suppress excessive level difference Effect

Inactive Publication Date: 2010-08-18
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second reason is considered to be light leakage due to phase difference from the protective film attached to the polarizer
However, adopting such a method results in the problem of increasing the thickness of the liquid crystal display or the number of film materials separately arranged on the outer sides of the pair of substrates.

Method used

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  • Phase difference control member, liquid crystal display, phase difference layer forming liquid crystal material composition
  • Phase difference control member, liquid crystal display, phase difference layer forming liquid crystal material composition
  • Phase difference control member, liquid crystal display, phase difference layer forming liquid crystal material composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0198] A glass substrate (manufactured by Corning Co., Ltd., 1737 material) was prepared as a base material, and a black matrix was formed on the glass substrate as an underlayer using a coloring material dispersion liquid. The formation of the black matrix is ​​carried out as follows.

[0199] [Formation of black matrix]

[0200]A pigment dispersion type photoresist is used for the coloring material dispersion liquid of a black matrix (BM). Pigment-dispersed photoresists are made by using pigments as coloring materials, adding glass beads to the dispersion liquid composition (containing pigments, dispersants and solvents), dispersing in a disperser for 3 hours, and then mixing to remove the glass beads. Bead dispersions and transparent photoresist compositions (containing polymers, monomers, additives, initiators and solvents) are obtained. The obtained pigment-dispersed photoresist had the composition shown below. In addition, the disperser used the paint shaker (paintsha...

Embodiment 2

[0261] To the liquid crystal material composition used in Example 1, further add 3.6 parts by weight of polymerizable polyfunctional acrylate (pentaerythritol triacrylate) as an additive for phase difference adjustment, and prepare a composition (containing an additive for phase difference adjustment) liquid crystal material composition), the liquid crystal material composition containing the phase difference adjustment additive is coated on the same "formation of BM as the glass substrate of the bottom layer" as in Example 1, and the liquid crystal coating film is formed, so that the liquid crystal coating is formed The temperature of the glass substrate of the film was 40° C., and the retardation layer was formed by irradiating it with ultraviolet light in the same manner as in Example 1, and a retardation control member was obtained in the same manner as in Example 1.

[0262] The film thickness (d) of the retardation layer in this retardation control member was 1.25 μm (125...

Embodiment 3

[0270] Prepare a glass substrate (manufactured by Corning Corporation, 1737 material) as a base material, and form a colored layer with a black matrix and a color pattern on the glass substrate as a bottom layer, except that, the same operation as in Example 1 is performed to obtain phase difference control member.

[0271] The colored layer was formed on the substrate as follows.

[0272] [Formation of colored layer]

[0273] First, in the same manner as in Example 1, a black matrix was formed on the surface of a glass substrate using a coloring material dispersion to obtain a glass substrate (BM forming substrate) on which a BM was formed.

[0274]

[0275] Coloring material dispersion liquids of red (R), green (G), and blue (B) color patterns were prepared. A pigment dispersion type photoresist can be used for the coloring material dispersion liquid of the color pattern of red (R), green (G), and blue (B).

[0276] The preparation of the pigment-dispersed photoresist o...

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Abstract

Provided is a phase difference control member which has a function to suppress a surface step amount and an excellent optical compensation function for the optical phase difference caused by a deflection plate. In the phase difference control member (1), the phase difference layer (4) has an optical axis standing against the surface having a normal in the thickness direction of the phase difference layer (4) and a surface step amount T of the phase difference layer (4) is smaller than 500 nm. When the phase difference layer (4) has refraction factors nx, ny, nz in the direction of the X axis, Y axis, and Z axis, the nx, ny, nz for the lightof wavelength 589 nm and a coefficient P are in the relationship of P = (nz - ((nx + ny / 2)) and the coefficient P and a thickness d (nm) of the phase difference layer (4) satisfy the following expressions: 0.005 <= P <= 0.04 (Expression 1) d <= 2000 (Expression 2) 10 <= P x d <= 40 (Expression 3).

Description

technical field [0001] The present invention relates to a phase difference control member, a liquid crystal display, and a liquid crystal material composition for phase difference layer formation. Background technique [0002] The liquid crystal display (LCD) (IPS-LCD) with IPS (In Plane Switching) mode as the display mode has an inherently wide viewing angle because the liquid crystal molecules are horizontally aligned in the plane during black display (dark display) , showing the advantages of excellent properties. [0003] As an IPS-LCD, when it is used for a general household TV, an LCD that can display color is often used, and when it is used as a monitor that displays medical images in an industrial monitor (roentgen monitor, etc.) For various applications, in consideration of the need for sharpness improvement, almost all LCDs of the monochrome display type that can make the area of ​​one pixel as small as possible compared with the color display type are used. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B5/20G02F1/13363
CPCG02F2413/03G02F1/133634G02B5/3033G02F2001/133635G02B5/3083G02F2001/133357G02F2413/11G02F1/133357G02F1/133635
Inventor 守谷德久
Owner DAI NIPPON PRINTING CO LTD
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