Light source device and projection type display apparatus

Details Light source device and projection type display apparatus Light source device and projection type display apparatus

1998-11-12

2000-10-31

Dowling, William

Optics: image projectors

Reflector

353102, 385146, 359894, G03B 2114

Patent

active

061391565

ABSTRACT:
A light source device or a projection type display apparatus has a pillar optical element; a condenser means; and a first lens effective to focus the image of the emitting end face of the pillar optical element at a surface to be irradiated; wherein the pillar optical element includes a tapered portion on a side of the incident end face and a non-tapered pillar portion on a side of the emitting end face, a cross-sectional area of the tapered portion continuously increasing from the incident end face toward the emitting end face and a cross-sectional area of the non-tapered pillar portion being constant.

REFERENCES:
patent: 5059013 (1991-10-01), Jain
patent: 5625738 (1997-04-01), Magarill
patent: 5634704 (1997-06-01), Shikama et al.
patent: 5748376 (1998-05-01), Lin et al.
patent: 5829858 (1998-11-01), Levis et al.
patent: 5860721 (1999-01-01), Bowron et al.
patent: 5868481 (1999-02-01), Conner et al.
patent: 5902033 (1999-05-01), Levis et al.

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