LED-based edge lit illumination system
First Claim
1. An edge lit lighting assembly comprising an LED light source;
- an optically transmissive lightguide having an input surface, a back surface, and an output surface; and
a radiation conversion material capable of absorbing at least a portion of the radiation at a first wavelength emitted by the LED and emitting a second radiation at a second wavelength;
wherein said radiation conversion material is at least one of dispersed in said lightguide, coated on said output surface of said lightguide, and dispersed in a film on the output and/or back surface of said light guide.
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Accused Products
Abstract
An edge lit illumination system is directed to providing backlighting utilizing a luminescent impregnated lightguide. The apparatus includes an LED radiation source providing a first radiation and a lightguide optically coupled to the LED radiation source including a luminescent material embedded or coated on an output surface of the lightguide designed to absorb the first radiation, and emit one or more radiations. The illumination system may further include additional optical components such as reflective layers, for directing radiation striking the back surfaces of the light guide back into the lightguide, as well as diffusion layers, UV reflectors, and polarizers.
208 Citations
20 Claims
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1. An edge lit lighting assembly comprising
an LED light source; -
an optically transmissive lightguide having an input surface, a back surface, and an output surface; and
a radiation conversion material capable of absorbing at least a portion of the radiation at a first wavelength emitted by the LED and emitting a second radiation at a second wavelength;
wherein said radiation conversion material is at least one of dispersed in said lightguide, coated on said output surface of said lightguide, and dispersed in a film on the output and/or back surface of said light guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A lightguide for use with an LED light source in an edge lit lighting assembly, said lightguide comprising
a optically transmissive monolith having an input surface, a back surface, and an output surface; - and
a radiation conversion material capable of absorbing a first radiation at a first wavelength and emitting a second radiation at a second wavelength;
wherein said radiation conversion material material is at least one of dispersed in said lightguide, coated on said output surface of said lightguide, and dispersed in a film on the output and/or back surface of said light guide. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification