Patent ID: 7256427

Claim:
A voltage controlled light active device for emitting two or more colors of light, comprising: a first electrode; a second electrode disposed adjacent to the first electrode and defining a gap therebetween; a light active layer comprised of a mixture of a light active particulate and a conductive carrier material, said mixture being disposed within said gap, said light active particulate comprised of first emitting particles including a first electroluminescent conjugated polymer, the first emitting particles emitting a number of photons of a first color in response to a first turn-on voltage applied to the electrodes and emitting a different number of photons of the first color in response to other turn-on voltages, said light active particulate further comprised of second emitting particles, the second emitting particles emitting a number of photons of a second color in response to a second turn-on voltage and a different number of photons of the second color in response to other turn-on voltages.