Lighting system for creating an illuminated surface

Details Lighting system for creating an illuminated surface Lighting system for creating an illuminated surface

2011-03-22

2011-03-22

Sawhney, Hargobind S (Department: 2885)

Illumination

Edge lighted panel

Light modifier for edge lit light source

C362S616000, C362S308000, C362S310000

Reexamination Certificate

active

07909496

ABSTRACT:
The present invention combines point light sources in combination with a light guide element and light redirecting elements into a system which can emit light across one or more extended surfaces of the light guide and may be designed to be able to emit light uniformly across the extended surfaces. The system comprises one or more light-emitting elements and a light guide in which are defined one or more voids. The light-emitting elements are optically coupled to the light guide by positioning them adjacent to a surface of the light guide, or by positioning them proximal to one or more of the voids. One or more light-emitting elements can be optically coupled to one void such that they emit light into the light guide substantially through that void and not through any other void of the one or more voids. Optically coupled to the light guide are a plurality of light redirecting elements for altering of the propagation of light through the light guide, thereby enabling light to be emitted from the surface of the light guide in a desired pattern, for example in a uniform illumination pattern.

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“LED Backlighting From Revolution to Reality”, Teh 6th Annual Display Search US FPD Conference, Mar. 30-Apr. 1, 2004.

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