Delay compensating plate, delay compensator, liquid crystal displaying device and projection type image displaying device

A liquid crystal display device and delay compensation technology, applied in projection devices, instruments, optics, etc., can solve problems such as large-angle correlation, contrast reduction, brightness (unfavorable luminance, etc.), and achieve the effect of easy and precise adjustment and improvement of contrast

Inactive Publication Date: 2008-03-19
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prism-type polarizing beam splitter suffers from large angular dependence and causes a reduction in contrast
Limitation of the cone angle to ensure contrast results in a disadvantage in brightness (brightness)

Method used

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  • Delay compensating plate, delay compensator, liquid crystal displaying device and projection type image displaying device
  • Delay compensating plate, delay compensator, liquid crystal displaying device and projection type image displaying device
  • Delay compensating plate, delay compensator, liquid crystal displaying device and projection type image displaying device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0128] The controllability of vertical retardation (Rth) of the shaped birefringent films produced as described below was evaluated.

[0129] As shown in FIG. 14, on a support 61 composed of a quartz substrate, SiO as a low refractive index film 2 film and Nb as a high refractive index film 2 o 5The films were alternately stacked into a total of 70 layers (sample 1), a total of 90 layers (sample 2), and a total of 100 layers (sample 3), thereby manufacturing a shaped birefringent layer (optical multilayer film) 62 .

[0130] SiO 2 Membrane and Nb 2 o 5 The thickness of the film was adjusted to 10 nm. "ULDis-900V" available from ULVAC Inc was used as a film forming apparatus. The retardation versus incident angle of these samples 1 to 3 was measured using "RETS-100" available from Otsuka Electronics Co., Ltd. . The results are shown in FIG. 15 . In the drawings, the abscissa represents the incident angle, and the ordinate represents the amount of Re (retardation).

[0...

example 2

[0134] Retardation compensating plates having shaped birefringent films according to other embodiments of the present invention, and retardation compensating plates not provided with such shaped birefringent films were produced, and the individual effects of compensating retardation were determined.

[0135] stack as a shaped birefringent film to a total of 70 layers of SiO 2 Membrane and Nb 2 o 5 Repeated multilayer films of films were formed on each of two quartz substrates with a thickness of 0.3 mm. The thickness of both was determined to be 10 nm. "ULDis-900V" available from ULVAC Inc was used as a film forming apparatus. An AR coating suitable for the blue band is then given on the sample surface. It was found that the reflectance was 0.5% or less in the wavelength band from 430 nm to 500 nm.

[0136] Two quartz substrates were bonded on their surfaces with respect to the film-forming surface while having a norbornene-based polymer film (manufactured by JSR Corporat...

example 3

[0147] A retardation compensation plate having an in-plane retardation of R0c=12 nm was prepared, and a change in retardation amount to be compensated (R0c / R0p= 4.8).

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Abstract

A delay compensation plate with double-refraction performance for compensating residual delay of the liquid crystal penal comprises: a combination unit composed of optical multi-layer film and polymer film, the optical multi-layer film is composed of a plurality of layers with different refractive indexes stacked with regular order. In the delay compensation plate, the surface inner delay of the delay compensation plate and the liquid crystal penal contents the following relationship: R0c/R0p is more than 1 and less than or equal to 10, wherein ROc is the surface delay of the delay compensation plate, and ROp is the surface delay of the liquid crystal penal.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Japanese Patent Application No. 2006-250143 filed with the Japan Patent Office on September 14, 2006, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a retardation compensation plate, a retardation compensator, a liquid crystal display device, and a projection type image display device using the retardation compensation plate, retardation compensator, and liquid crystal display device for compensating retardation of, for example, a liquid crystal panel. Background technique [0004] There is known a projection device as a projection type image display device that realizes an enlarged image by running enlarged projection of the image onto a screen. Especially in recent years, a so-called liquid crystal projection device has been spread, which projects a light beam emitted from a light source onto a screen a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13363G02B5/30G03B21/00
CPCG02B27/141G02F2202/40G02F2413/08G02F2001/133637G02B27/283G02F1/13363G02B5/3083G02F2413/11G02F1/133634G02F1/133637
Inventor 村本穰
Owner SONY CORP
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