Projection type image display apparatus

Details Projection type image display apparatus Projection type image display apparatus

2005-05-17

2005-05-17

Nguyen, Judy (Department: 2851)

Optics: image projectors

Composite projected image

Multicolor picture

C353S020000, C353S034000, C353S037000, C349S005000, C349S008000, C349S009000

Reexamination Certificate

active

06893131

ABSTRACT:
A compact, light projection type image display apparatus based on reflection image display devices which provide high brightness without contrast deterioration caused by light leakage associated with black image display. The apparatus uses, as polarizers/analyzers for reflection image display devices, reflection polarizing plates which function as polarizing plates by their grating function only in a specific direction. In each light path, the reflection polarizing plate is located just before/after the reflection image display device.

REFERENCES:
patent: 6262851 (2001-07-01), Marshall
patent: 20040066492 (2004-04-01), Nakashima et al.
ProFlux “Optically Flat Polarizing Beamsplitters”, Catalog No. PBF02A, May 2002; pp. 2pgs.

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