Rear projection television set with lenticular sheet and fresnel

Details Rear projection television set with lenticular sheet and fresnel Rear projection television set with lenticular sheet and fresnel

1990-12-10

1992-09-08

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358237, 353 77, 359457, H04N 931, H04N 574

Patent

active

051463423

ABSTRACT:
A rear projection television set in which a lenticular sheet is superposed to a Fresnel lens to form a light transmissive screen, at least one projection cathode ray tube projects an image onto the Fresnel lens so that the image through the lenticular is viewed by a viewer. A projector lens is mounted to the projection cathode ray tube and has an exit pupil so as to project the image from the projection tube onto the Fresnel lens. The image through the lenticular sheet is viewed at a distance from the lenticular lens, wherein there is a relation a.times.b<5.5 where a is distance between the exit pupil of the projector lens 2 and the Fresnel lens 1, and b is a condensing distance for a maximum radius equal to the vertical dimension of the screen.

REFERENCES:
patent: 4439027 (1984-03-01), Shioda et al.
patent: 4536056 (1985-08-01), Oguino
patent: 4636035 (1987-01-01), Clausen et al.
patent: 4752116 (1988-06-01), Sekiguchi
patent: 4810075 (1989-03-01), Fukuda

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