High-density illumination system

Details High-density illumination system High-density illumination system

2005-03-29

2005-03-29

Husar, Stephen F (Department: 2875)

Illumination

Light modifier

Refractor

C362S019000, C362S245000, C362S328000, C362S800000, C349S061000

Reexamination Certificate

active

06871982

ABSTRACT:
A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar array of electrically-interconnected LED chips positioned within the input apertures of a corresponding array of shaped metallic reflecting bins using at least one of elevated prismatic films, polarization converting films, micro-lens arrays and external hemispherical or ellipsoidal reflecting elements. Practical applications of the LED array illumination systems include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.

REFERENCES:
patent: 4947291 (1990-08-01), McDermott
patent: 5361190 (1994-11-01), Roberts et al.

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