Patent ID: 8363299

Claim:
Apparatus for generating pulses of light of differing colors, the apparatus comprising a light source and a filter assembly arranged to receive light from the light source, the filter assembly comprising: a first electro-optic layer having a light-transmissive state and a colored state having a first optical characteristic; a first electrode arranged to apply to the first electro-optic layer an electric field capable of switching the first electro-optic layer between its light-transmissive and colored states; a second electro-optic layer having a light-transmissive state and a colored state having a second optical characteristic different from the first optical characteristic; a second electrode arranged to apply to the second electro-optic layer an electric field capable of switching the second electro-optic layer between its light-transmissive and colored states; a third electro-optic layer having a light-transmissive state and a colored state having a third optical characteristic different from the first and second optical characteristics, and a third electrode arranged to apply to the third electro-optic layer an electric field capable of switching the third electro-optic layer between its light-transmissive and colored states.