Illumination system in liquid crystal projector

Details Illumination system in liquid crystal projector Illumination system in liquid crystal projector

2005-01-25

2005-01-25

Thomas, Tom (Department: 2815)

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

C349S008000, C349S009000, C349S061000, C353S031000, C353S034000

Reexamination Certificate

active

06847412

ABSTRACT:
Illumination system in a liquid crystal projector for improving an optical efficiency of a fly eye lens, including a light source, a first fly eye lens having first lens cells each with a first center point, and second lens cells each with a second center point disposed in outer parts of the first lens cells, for receiving beams of lights from the light source in correspondence to the first center points of the first lens cells and the second center points of the second lens cells, respectively, and a second fly eye lens having a plurality of lens cells for refracting the beams from the first fly eye lens into parallel beams.

REFERENCES:
patent: 6144420 (2000-11-01), Jung
patent: 6219111 (2001-04-01), Fukuda et al.
patent: 6273569 (2001-08-01), Iechika et al.
patent: 6351295 (2002-02-01), Kakuda et al.

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