Patent ID: 6637905
Filing Date: 2003-10-28
Classification: F21Y,G02B

Abstract:
A backlighting apparatus comprising:a radiation source that provides a first radiation, wherein the radiation source is selected from a group consisting of a color light emitting diode, a color laser diode, a white light emitting diode, a white laser diode, an ultra violet light emitting diode, and an ultra violet laser diode; a filter layer optically coupled to the radiation source, the filter layer including a luminescent material and designed to absorb the first radiation, in whole or in part, and emit an emitted radiation or a composite radiation; a light guide optically coupled to the filter layer to receive the emitted radiation or composite radiation and to reflect at least a portion of the emitted radiation or composite radiation; and a display layer optically coupled to the light guide to receive the reflected radiation or composite radiation.