Case for overhead projection display panel

Details Case for overhead projection display panel Case for overhead projection display panel

1993-01-06

1994-08-09

Cuchlinski, Jr., William A.

Optics: image projectors

Housing

353122, G03B 2114

Patent

active

053371038

ABSTRACT:
The present invention includes a case (54) for an overhead projection display panel (50) used with an overhead projector light source (52). The case supports a light modulating element (60) such as, for example, a liquid crystal device, and encases modulation control circuitry (32) for controlling the light modulating element. The case includes an annular case element (56) for supporting the light modulating element along its side margin so that it can modulate light transmitted from the overhead projector light source. The case also includes an occluding panel (58) connected to and extendable from the annular case element for selectably occluding a portion of the overhead projector light source. At least one of the annular case elements and the occluding panel encasing the modulation control circuitry of the display panel.

REFERENCES:
patent: 4917465 (1990-04-01), Conner et al.
patent: 4946274 (1990-08-01), Honda
patent: 4950072 (1990-08-01), Honda
patent: 5121984 (1992-06-01), Jones et al.
patent: 5173686 (1992-12-01), Fujihara
patent: 5227820 (1993-07-01), Miyoshita et al.
patent: 5231434 (1993-07-01), Kennedy et al.

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