System for backlighting LCD matrices including luminescent dots

Details System for backlighting LCD matrices including luminescent dots System for backlighting LCD matrices including luminescent dots

1991-08-26

1993-11-30

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 49, 359 50, G02F 11335

Patent

active

052670627

ABSTRACT:
A backlighting system for use in generating collimated light for illuminating LCD matrices. The system includes a plurality of lenses arranged in an array on one side of a planar substrate, a plurality of luminescent phosphor dots located on the opposite side of the substrate from the lenses at the focal points of the lens and a mechanism for stimulating the phosphor dots to emit light. The phosphor dots may be responsive to ultraviolet light in which case a fluorescent lamp adapted for emitting ultraviolet light may be used to stimulate the dots to emit visible light. The visible light is then collimated by the lenses and directed for backlighting a display matrix.

REFERENCES:
patent: 4330813 (1992-05-01), Deutsch
patent: 4686519 (1987-08-01), Yoshida et al.
patent: 4790632 (1988-12-01), Miyakawa et al.
patent: 4799050 (1989-01-01), Prince et al.
patent: 4917464 (1990-04-01), Conner
patent: 5019808 (1991-05-01), Prince et al.
patent: 5128783 (1992-07-01), Abileah et al.

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