Projection display apparatus

Details Projection display apparatus Projection display apparatus

1995-06-05

1996-12-10

Dowling, William

Optics: image projectors

Cabinet encloses projector and one side of screen

353 38, 359457, 359454, G03B 2110, G03B 2156

Patent

active

055824730

ABSTRACT:
A projection display apparatus comprises a compact CRT, a projecting lens for projecting an enlarged image of the CRT, a Fresnel lens having a converging effect, a lenticular sheet as a diffusing plate. An image that has been enlarged by the projecting lens and passed through the lenticular Fresnel lens is formed on the lenticular sheet. The apparatus further comprises a displacing mechanism for displacing the Fresnel lens, and a display mechanism for displaying information related to the direction and extent of displacement of the Fresnel lens displaced by the displacing mechanism.

REFERENCES:
patent: 2780136 (1957-04-01), Erban
patent: 3473862 (1969-10-01), Hauber et al.
patent: 3610728 (1971-10-01), Firth
patent: 3640602 (1972-02-01), Wolfe
patent: 4143943 (1979-03-01), Rawson
patent: 4941036 (1990-07-01), Itoh
patent: 5408282 (1995-04-01), Nagashima et al.

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