Direct-lit backlight with angle-dependent birefringent diffuser

Details Direct-lit backlight with angle-dependent birefringent diffuser Direct-lit backlight with angle-dependent birefringent diffuser

2011-08-30

2011-08-30

Sember, Thomas M (Department: 2885)

Illumination

With polarizer

C362S097200, C362S097300, C362S331000, C359S489060, C359S485020

Reexamination Certificate

active

08007118

ABSTRACT:
A direct-lit backlight includes a diffuse reflector disposed in front of a light source. The diffuse reflector has a continuous phase material and a disperse phase material, at least one of which is birefringent, and the disperse phase material is formed into particles having a transverse dimension less than 1 micrometer for efficient visible light scattering. The continuous and disperse phases have refractive indices tailored so the diffuse reflector transmits light from the light source substantially more strongly for obliquely incident light than for normally incident light to provide bulb-hiding characteristics.

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patent: WO 97/32223 (1997-09-01), None
patent: WO 97/32226 (1997-09-01), None
patent: WO 01/90637 (2001-11-01), None

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