Patent ID: 8616705

Claim:
A light source device comprising: a first solid state light source for generating a first color light; a second solid state light source for generating a second color light; a light combining device for receiving the first and second color lights and combining them into a combined light beam; a color filter device disposed to receive a light spot generated by the combined light beam, including a first filter segment transmitting at least a portion of the first color light and a second filter segment transmitting at least a portion of the second color light, wherein portions of the first and second filter segments define one or more spoke ranges located near one or more boundaries between adjacent ones of the first and second filter segments, including a first spoke range located near a first boundary between the first and second filter segments; a drive mechanism for driving the color filter device to move periodically, wherein the first and second filter segments and the first spoke range are alternately disposed on a path of the combined light beam to be illuminated by the light spot when the color filter device moves; and a light source control device for controlling the first and second light sources, wherein the light source control device turns on only the first light source when at least a portion of the light spot is located in the first filter segment outside of any spoke range, turns on only the second light source when at least a portion of the light spot is located in the second filter segment outside of any spoke range, and turns on both the first and the second light sources when the light spot is located entirely in the first spoke range.