Large area projection liquid-crystal video display system with i

Details Large area projection liquid-crystal video display system with i Large area projection liquid-crystal video display system with i

1990-12-21

1992-11-03

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 61, 358232, H04N 574, H04N 931

Patent

active

051610272

ABSTRACT:
A relatively small and low-cost system is provided for projecting a large and bright television image onto a screen. A minature liquid crystal array is driven by video circuitry to produce a pattern of transparencies in the array corresponding to a television image. Light is directed against the rear surface of the array to illuminate it, while a projection lens lies in front of the array to project the image of the array onto a large screen. Grid lines in the liquid crystal array are eliminated by a spacial filter which comprises a negative of the Fourier transform of the grid.

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Electronic Display, copyrighted 1979, Utley Interscience.
Facsimile Printer Utilizing Liquid Crystal Cells, J. Rults, The 1970 IDEA Symposium, Society For Information Display, May 1970, pp. 106-107.
Liquid Crystal Matrix Display, by Bernard J. Lechner et al., Proceedings of the IEEE, vol. 59, No. 11, Nov. 1971, pp. 1566-1578.
Projection Television, by Angus Robertson, Wireless World, Sep. 1976, pp. 47-52.

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