Compact integrated LCD projector

Details Compact integrated LCD projector Compact integrated LCD projector

1997-01-22

1998-10-13

Dowling, William

Optics: image projectors

Housing

G03B 2114

Patent

active

058202420

ABSTRACT:
A compact electronic projector has a display assembly, such as a liquid crystal display panel and associated Fresnel lenses, which is mounted inside the projector body so as to rotate between a storage position in which the display assembly is generally parallel with the projection axis of the device, and a deployed position in which the display assembly is disposed at an oblique angle (such as 90.degree.) with respect to the projection axis. The assembly can thus be rotated to occupy the voids needed for expansion and contraction of the optical beams when the projector is in use, which voids have no useful function when the projector is not in use, and are thus available for component storage. This feature enables saving of a substantial volume of space, making the closed unit compact and easily transported. A linkage may further be provided to cause a projection lens to extend at least partially outside of the body in the deployed position, and to cause the projection lens to retract back inside the body in the storage position. In one embodiment, the body has doors movable between an open position, when the display assembly is in its deployed position, and a closed position, when the display assembly is in its storage position, and the display assembly extends through the doors in the deployed position. An adjustable rear foot may be used to adjusting the pitch angle of the projection axis.

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