Liquid crystal display device for overhead projector

Details Liquid crystal display device for overhead projector Liquid crystal display device for overhead projector

1989-01-13

1990-02-27

Haroian, Harry N.

Optics: image projectors

Miscellaneous

353DIG3, 353DIG5, 353 23, 353 60, G03B 2100

Patent

active

049040790

ABSTRACT:
A liquid crystal display device for an overhead projector has a light-transmissive liquid crystal display cell sandwiched between protective plates both from above and below. At least one of these protective plates is separated from the cell surface to form an air passage provided with a fan such that air can be caused to flow therethrough and come into direct contact with the cell. The cell can thus be cooled efficiently and the light of the projector can be increased for projecting a clearer image.

REFERENCES:
patent: 2315914 (1943-04-01), Wengel
patent: 3922667 (1975-11-01), Ueda
patent: 4257695 (1981-03-01), Langworthy
patent: 4652101 (1987-03-01), Gaunwald
patent: 4824210 (1989-04-01), Shimazaki

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