Patent ID: 7738174
Filing Date: 2010-06-15
Classification: G02B

Abstract:
1. A system for optical color division, receiving an incident light from a side and dividing the incident light into a plurality of color lights, the system comprising: a bottom plate; a first light guide plate, comprising a first surface and a second surface, wherein the second surface comprises a plurality of microstructures, the first surface is disposed on the bottom plate, the incident light is reflected back and forth between the first surface and the second surface, and a part of the incident light penetrates the microstructures to generate a transmitted light; a second light guide plate, comprising an incident surface and a grating structure surface, and disposed on the first light guide plate, wherein the incident surface receives the transmitted light, and the grating structure surface divides the transmitted light into the color lights; and a third light guide plate, disposed on the second light guide plate, wherein a light exit surface of the third light guide plate comprises a plurality of protruding refractive structures for refracting the color lights to a predetermined direction.