Projection type image display apparatus

Details Projection type image display apparatus Projection type image display apparatus

1990-07-17

1991-10-15

Shoap, Allan N.

Optics: image projectors

Unitary plural refracting surfaces

358231, 359456, 359 64, G03B 2114

Patent

active

050569120

ABSTRACT:
A projection type image display apparatus having a source of light, a transmissive display device having a number of picture elements, a light converging means for converging rays of light in correspondence to one or more of the picture elements, a projecting lens disposed backward of the display device so as to project the image represented by the display device on a screen, the projection lens having a larger numerical aperture than that of the converging means.

REFERENCES:
patent: 3840695 (1984-10-01), Fischer
patent: 3877801 (1975-04-01), MacGovern
patent: 4082438 (1978-04-01), Knop
patent: 4428647 (1984-01-01), Sprague et al.
patent: 4497015 (1985-01-01), Konno et al.
patent: 4936657 (1990-06-01), Tejima et al.
patent: 4969732 (1990-11-01), Wright et al.

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