Light source utilizing diffusive reflective cavity

Details Light source utilizing diffusive reflective cavity Light source utilizing diffusive reflective cavity

1997-09-04

2000-03-28

Lee, Thomas D.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

359619, G02F 1133

Patent

active

060435917

ABSTRACT:
A light source for backlighting a display comprises a light-emitting device such as an incandescent bulb or LED array disposed within a cavity having diffusely reflecting walls and an aperture. A diffuser and brightness enhancing film are situated at the opening of the aperture between the aperture and the display to be backlit. A color filter may also be employed to whiten the light emerging from the light source.

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