Television receiver projection system

Details Television receiver projection system Television receiver projection system

1978-04-07

1980-01-01

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358248, 358250, 358254, 312 7TV, H04N 574, H04N 5645, H04N 572, H04N 564

Patent

active

041819187

ABSTRACT:
An economical system for magnifying and projecting the image generated on a television receiver cathode ray tube employs a vertical deflection reversing switch to invert and laterally reverse the image, and a three element lens within a light-proof projection chamber to re-invert, magnify and project the image onto a forward projection type reflective screen. The projection chamber utilizes a white diffuse reflective surface upon its inner walls to increase the intensity of the projected image without visibly reducing the resolution of the image. The system also utilizes a cylindrical lens assembly to provide a simplified focusing arrangement.

REFERENCES:
patent: D235655 (1975-07-01), Clement et al.
patent: 2119102 (1938-05-01), Flaherty
patent: 2512553 (1950-06-01), Reid
patent: 2805411 (1957-09-01), Rose
patent: 3800085 (1974-03-01), Ambats et al.
patent: 3944734 (1976-03-01), Ogawa
patent: 3949167 (1976-04-01), Koyama et al.
patent: 4021105 (1977-05-01), Schubach
patent: 4058837 (1977-11-01), Muntz
Electronic Servicing, Jun. 1978, pp. 14-16; "1979 Color TV Previews, General Electric Widescreen 1000."
Wireless World, vol. 82, No. 1490, pp. 67-72, Oct. 1976: "Projection TV-2-Refractive Projectors."
Radio Electronics, Dec. 1976, pp. 44-46: "Projection TV Roundup."

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