The color-tunable light emitter has a first electrode and a light-generating layer adjacent the first electrode. The light-generating layer is operable to generate light in a band of wavelengths. The color-tunable light emitter also includes an electro-optical layer, a second electrode adjacent the electro-optical...http://www.google.ca/patents/US7148516?utm_source=gb-gplus-sharePatent US7148516 - Color-tunable light emitter
