Illumination system and display device

Details Illumination system and display device Illumination system and display device

1995-12-29

1998-10-13

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

G02F 11335

Patent

active

058220291

ABSTRACT:
An illumination system includes a polarized light source which emits circularly polarized light of a particular handedness and a cholesteric filter having a region arranged to transmit circularly polarized light falling within a first wavelength band and to reflect other wavelengths of circularly polarized light. A reflector redirects the reflected light back towards the cholesteric filter. The cholesteric filter can include a first layer having portions which reflect red, green and blue light while transmitting other colors, and a second layer identical to the first layer but out of alignment therewith so that each region of the filter transmits only one color of light, the other colors being reflected.

REFERENCES:
patent: 3669525 (1972-06-01), Adams et al.
patent: 3679290 (1972-07-01), Adams et al.
patent: 4987410 (1991-01-01), Berman et al.
patent: 5054888 (1991-10-01), Jacobs et al.
patent: 5221982 (1993-06-01), Jaris
patent: 5235443 (1993-08-01), Barnik et al.
patent: 5267060 (1993-11-01), Colton
patent: 5295009 (1994-03-01), Barnik et al.
patent: 5325218 (1994-06-01), Willett et al.
patent: 5486935 (1996-01-01), Kalmanash
patent: 5619355 (1997-04-01), Sharp et al.
European Search for Application No. 95309518.9: dated Mar. 17, 1997.
R. Maurer et al., SID 94 Digest, 1994, "26.1: Cholesteric Reflectors with a Color Pattern", pp. 399-402.
Robert Maurer, et al., SID 90 Digest, 1990, "7.6: Polarizing Color Filters made from Cholesteric LC Silicones", pp. 110-113.
Search Report for U.K. Appl. 9426329.0, mailed Mar. 20, 1995.
Schadt et al., Jap. Journal of Appl. Phys., vol. 29. No. 10, Oct. 1990, 1990, pp. 1974-1984, "New Liquid Crystal Polarized Color Projection Principles."

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