Patent ID: 6366270
Filing Date: 2002-04-02
Classification: G02B,G02F,G09G

Abstract:
A color balancing system comprising:a modulated information display layer that is non-emissive; a first light source of a first color temperature positioned to illuminate said modulated information display; a second light source of a second color temperature different from said first color temperature, said first and second light sources positioned relative to one another so to illuminate said modulated information display layer with light having a net color temperature that is dependent on an intensity of said first light source and an intensity of said second light source wherein said first and said second light sources alter said net color temperature of said light, within a predetermined color temperature range, by controlling said intensity of said first light source and said intensity of said second light source; a first light pipe optically coupled to receive light from said first light source and for illuminating said modulated information display layer with said light from said first light source; and a second light pipe optically coupled to receive light from said second light source and for illuminating said modulated information display layer with said light from said second light source, wherein said second light pipe is disposed parallel to said first light pipe and wherein an air gap exists between said first and said second light pipes; wherein said first light source is disposed along a first edge of said first light pipe and wherein said second light source is disposed along a first edge of said second light pipe, wherein said first edge of said first light pipe is parallel to said first edge of said second light pipe; and wherein said first edges of said first and second light pipes are along opposite sides of said first and said second light pipes.