Protection type display device with polarized light reflecting m

Details Protection type display device with polarized light reflecting m Protection type display device with polarized light reflecting m

1997-07-10

1998-10-27

Dowling, William

Optics: image projectors

Polarizer or interference filter

349 9, G03B 2114

Patent

active

058269606

ABSTRACT:
A display device includes a reflective type polarizer, a light valve, an analyzer, a mirror, and a polarization rotating film. The polarizer allows a first polarized light to pass therethrough and a second polarized light to be reflected thereby. The second polarized light is then reflected to the polarizer by the mirror, and the vibrating plane of the second polarized light is rotated by the polarization rotating film, so that the second polarized light can pass through the polarizer. The polarizer is inclined to an optical axis of the device. The mirror is arranged near the light source. This principle is also applied to a projection type color display device. In addition, a polarized light source including a lamp, a reflector, a polarizer, a mirror, and a polarization rotating film is disclosed.

REFERENCES:
patent: 5381278 (1995-01-01), Shingaki
patent: 5387953 (1995-02-01), Minoura et al.
patent: 5535054 (1996-07-01), Shibuya
patent: 5601351 (1997-02-01), Vandeubrandt
patent: 5626408 (1997-05-01), Heynderickx et al.

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