Liquid crystal projection display apparatus having two microlens

Details Liquid crystal projection display apparatus having two microlens Liquid crystal projection display apparatus having two microlens

1990-10-23

1992-06-30

Heyman, John S.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 83, G02F 11335, G02F 11333

Patent

active

051268639

ABSTRACT:
In a liquid crystal projection display apparatus, light is emitted from a light source and is separated and directed to pixels of a liquid crystal display element and condensed at the center of each pixel with a first microlens array. The light which has passed through the liquid crystal display element is converted into approximately parallel rays with a second microlens array. The light which has passed through the second microlens array is projected onto a screen via a projection lens.

REFERENCES:
patent: 4722593 (1988-02-01), Shimazaki
patent: 4790632 (1988-12-01), Miyakawa et al.
patent: 4836652 (1989-06-01), Oishi et al.
patent: 4909601 (1990-03-01), Yajima et al.
patent: 4917464 (1990-04-01), Conner
patent: 5052783 (1991-10-01), Hamada

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