Projection display device

Details Projection display device Projection display device

1991-04-19

1992-06-23

Cuchlinski, Jr., William A.

Optics: image projectors

Reflector

Plural

353 37, 353102, 359 49, G03B 2128

Patent

active

051237296

ABSTRACT:
In a projection display device having an illumination optical system which converts the light emitted from a point light source into a substantially parallel luminous flux, a light valve which modulates the light flux, and an optical projection system which projects images on the light valve onto a screen, the illumination optical system converts the light into a substantially parallel luminous flux having a cross section of substantially the same size and shape, e.g., rectangular shape, as the shape of the frame of the light valve.

REFERENCES:
patent: 3264467 (1966-08-01), Mann et al.
patent: 3893758 (1975-07-01), Houzinger et al.
patent: 4127322 (1978-11-01), Jacobson et al.
patent: 4191456 (1980-03-01), Hong et al.
patent: 4464019 (1984-08-01), Gagnou
patent: 4912614 (1990-03-01), Goldenberg
patent: 4971436 (1990-11-01), Aoki et al.

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