Patent ID: 7264367
Filing Date: 2007-09-04
Classification: F21K,F21Y,G02B

Abstract:
1. An illumination device comprising: a light source emitting light of a first color; a waveguide having both optical waveguide and light scattering properties; and a light-transmitting medium composed of a matrix of substantially translucent material doped with a pigment, said light-transmitting medium positioned between said light source and said waveguide such that a portion of said light emitted by said light source passes around said light-transmitting medium and reaches said waveguide directly and a portion of said light emitted by said light source is received by said light-transmitting medium, said pigment changing a portion of said light of said first color to a light of a second color, said light-transmitting medium emitting said light of said second color; wherein said waveguide receives said light of said first color and said light of said second color, mixes said light via said light scattering and optical waveguide properties to create light of a combined color that is a combination of the first color and the second color, and emits said light of said combined color.