Projection-display apparatus and method providing improved brigh

Details Projection-display apparatus and method providing improved brigh Projection-display apparatus and method providing improved brigh

1996-12-11

1998-08-25

Dowling, William

Optics: image projectors

Composite projected image

Multicolor picture

353 20, 353 31, 349 9, G03B 2114

Patent

active

057988196

ABSTRACT:
Methods and apparatus are disclose for obtaining a bright projected color image. In a representative apparatus, polarized beam splitters (one for each primary color of an image to be projected) separate p-polarized light and s-polarized light for each of the primary colors. Each separated s- and p-polarized light for each color enters a respective spatial light modulator. For each primary color, modulated light fluxes produced by the two spatial light modulators, which perform modulation of the same image, are analyzed and integrated by the polarized beam splitters. The analyzed and integrated light fluxes for each primary color are color integrated, either by projection using separate projection lenses for each color, or by a cross-dichroic prism followed by projection using a single lens.

REFERENCES:
patent: 4127322 (1978-11-01), Jacobson et al.
patent: 5028121 (1991-07-01), Baur et al.
patent: 5172254 (1992-12-01), Atarashi et al.
patent: 5357289 (1994-10-01), Konno et al.
patent: 5575548 (1996-11-01), Lee

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