Liquid crystal picture screen with collimator having...

Details Liquid crystal picture screen with collimator having... Liquid crystal picture screen with collimator having...

2006-10-24

2006-10-24

Schechter, Andrew (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C349S095000, C362S330000, C362S339000

Reexamination Certificate

active

07126653

ABSTRACT:
The invention relates to a liquid crystal picture screen provided with a background lighting system which comprises at least one light source and a collimator formed by hourglass-shaped microprisms. The light of the light source can be effectively collimated within a desired angular range by means of the collimator.

REFERENCES:
patent: 5598281 (1997-01-01), Zimmerman et al.
patent: 5839823 (1998-11-01), Hou et al.

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