Polymer dispersed liquid crystal panel with diffraction grating

Details Polymer dispersed liquid crystal panel with diffraction grating Polymer dispersed liquid crystal panel with diffraction grating

Filed on

1993-04-08

Date issued

1995-12-19

Examiner

Sikes, William L.

Patent Class

Optical: systems and elements

SubClass

Holographic system or element

SubSubClass

Using a hologram as an optical element

Other Related Categories

359 51, 359 95, G02F 11335, G02F 113, G02F 1137

Type

Patent

Status

active

Patent number

054773512

Description

ABSTRACT:
Pixel electrodes of a liquid crystal panel are made of a transparent conductive material, while a reflection electrode is formed on a counter substrate. A liquid crystal layer made of liquid crystal/resin composite is interposed between the pixel electrodes and the reflection electrode. Incident light is scattered in the liquid crystal layer or transmits the liquid crystal layer and is reflected by the reflection electrode according to the applied voltage to modulate the light. The pixel electrodes consist for example of two layers of a dielectric layer of thickness of .lambda./4 and a transparent conductive layer of thickness of .lambda./2. A grating is formed on the reflection electrode at the interface with the liquid crystal. When a voltage is applied to the liquid crystal layer, the refractive index thereof changes to be equal to that of the grating, and the incident light propagates straightly. Otherwise the incident light is diffracted. The liquid crystal panel is used as a light bulb for a projection type television.

REFERENCES:
patent: 4195915 (1980-04-01), Lichty et al.
patent: 4613207 (1986-09-01), Fergason
patent: 4688900 (1987-08-01), Doane et al.
patent: 4850681 (1989-07-01), Yamanobe et al.
patent: 4883343 (1989-11-01), Teshirogi
patent: 4977456 (1990-12-01), Furuya
patent: 5105289 (1992-04-01), Sonehara et al.
patent: 5148298 (1992-09-01), Shigeta et al.
patent: 5148302 (1992-09-01), Nagano et al.
patent: 5299289 (1994-03-01), Omae et al.
patent: 5374371 (1994-12-01), Takeuchi et al.
Proceedings of the 9th International Display Research Conference, Oct. 16-18, 1989 (Japan Display '89, pp. 584-587).

Affiliated with

Also associated with

Rating

Polymer dispersed liquid crystal panel with diffraction grating does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymer dispersed liquid crystal panel with diffraction grating , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymer dispersed liquid crystal panel with diffraction grating will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-995555