LCD integrated/overhead projector

Details LCD integrated/overhead projector LCD integrated/overhead projector

1997-04-30

1998-10-27

Dowling, William

Optics: image projectors

Plural projection paths with single light source

353119, G03B 2114

Patent

active

058269622

ABSTRACT:
A projector includes a housing having a single light projection source. A first condenser projects a first light beam from the light source, through an LCD image display screen mounted in the housing, and to a projection surface. A second condenser projects a second beam of light from the light source, to an overhead projector mounted on the housing, and to the projection surface. A beam blocking device is connected to the housing for movement into a position for selectively blocking the second beam of light.

REFERENCES:
patent: 3922079 (1975-11-01), Astero
patent: 4595266 (1986-06-01), Kramer
patent: 5231434 (1993-07-01), Kennedy et al.
patent: 5321450 (1994-06-01), Shapiro et al.
patent: 5428415 (1995-06-01), Keelan et al.
patent: 5461437 (1995-10-01), Tanaka
patent: 5632546 (1997-05-01), Lee

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