Liquid crystal projection color display apparatus having microle

Details Liquid crystal projection color display apparatus having microle Liquid crystal projection color display apparatus having microle

1990-11-29

1992-09-01

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 54, 359 71, 359319, 359290, 353 31, 353 34, G02F 1133

Patent

active

051444623

ABSTRACT:
In a liquid crystal projection color display apparatus having three liquid crystal display devices used for red, green and blue light, each liquid crystal display device has a liquid crystal display panel and a microlens array disposed on the light-source side or the light-source and screen sides of the liquid crystal display panel. The microlens array has a controllable refractive power which is controlled by applying an electrtical power thereto. An electrical voltage is applied between transparent electrodes formed on both surfaces of a microlens array so that the refractive power of the microlens array can be made a value adapted to suit the corresponding one of red, green and blue light.

REFERENCES:
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patent: 5015080 (1991-05-01), Cassarly et al.
patent: 5020885 (1991-06-01), Shibaguchi

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