Display apparatus

Details Display apparatus Display apparatus

1992-07-16

1993-05-25

Cuchlinski, Jr., William A.

Optics: image projectors

Epidiascope

353 65, 353 28, 353DIG4, G03B 2108

Patent

active

052144585

ABSTRACT:
In order to provide a display apparatus which can express projected images of small characters, illustrations or the like in not only the daytime or an illuminated bright place, but also the nighttime in the case where brightness is deficient, besides which can be used in not only the outdoors, but also the inside of a dark room, the present display apparatus comprises a mirror Fresnel lens, an original picture for projection positioned over the surface of the mirror Fresnel lens, and a projection mechanism positioned on the surface side of the mirror Fresnel lens and at the same time, disposed so as to emit light on the surface of the mirror Fresnel lens, further the light emitted from the projection mechanism being reflected by the mirror Fresnel lens to project an image of the original picture for projection on a prescribed plane of projection.

REFERENCES:
patent: 3293982 (1966-12-01), Appeldorn
patent: 4735500 (1988-04-01), Grunwald
patent: 4943156 (1990-07-01), Vanderwetf
patent: 4986651 (1991-01-01), Vanderwerf

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