Patent ID: 8888297
Filing Date: 2014-11-18
Classification: G02B,G03B,H04N

Abstract:
1. A polarization conversion method for a polarized light source device, comprising: providing a polarization conversion device comprising a moveable carrier which carries one or more wavelength conversion materials; directing an excitation light from a light emitting element onto the moveable carrier of the polarization conversion device, wherein a size of a light spot of the excitation light illuminating on the moveable carrier is smaller than a size of the moveable carrier, and wherein different segments of the moveable carrier are alternately illuminated by the light spot of the excitation light; directing a converted light generated by the wavelength conversion materials as an output light of the polarized light source device; and providing a stationary reflection-type polarization beam splitting device fixedly disposed adjacent the moveable carrier on an output side, wherein the reflection-type polarization beam splitting device transmits a portion of the converted light generated by the wavelength conversion materials to produce the output light and reflects another portion of the converted light back to the wavelength conversion materials, wherein the reflection-type polarization beam splitting device is a reflection-type polarization beam splitter plate, and wherein the polarization beam splitter plate has a size smaller than the size of the moveable carrier and larger than the size of the light spot of the excitation light.