Compact projection systems using multiple light sources

Details Compact projection systems using multiple light sources Compact projection systems using multiple light sources

2007-10-23

2007-10-23

Koval, Melissa Jan (Department: 2851)

Optics: image projectors

Light shield, mask, hood, or diaphragm

C353S088000, C353S030000

Reexamination Certificate

active

11037008

ABSTRACT:
The invention relates to a projection system using multiple light sources (1) at the same time. The projection system (100) comprises multiple light sources (1), a lens array system for each of the light sources (1), a condenser lens (2), an aperture means (3), a light valve assembly and a projection lens (5) to project an image. The light sources are adapted to each simultaneously illuminate the whole light valve assembly. In one aspect, the invention relates to a system and methods for allowing separately control of brightness, contrast, dichroic color shift or beam uniformity. This controlling or adjustment is performed by controlling and/or adjusting the cross-section of the illumination beam of each of the multiple light sources near the aperture of the aperture means.

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