Patent ID: 7551158

Claim:
A display device, comprising: light sources, each for emitting light in a different respective wavelength range; electro-optical elements defining pixels of an image, said electro-optical elements being optically coupled to receive said light emitted from said light sources and spatially arranged such that each of said electro-optical elements is operable to selectively pass said light in said wavelength range of one of said light sources; a sensor optically coupled to receive light output from a portion of said electro-optical elements and operable to measure a measured intensity of said light output from said portion of said electro-optical elements; and a controller operable to: activate a selected one of said light sources, alter at least select ones of said electro-optical elements within said portion of said electro-optical elements that are arranged to pass said light in said wavelength range of the selected one of said light sources, read out said measured intensity of light from said sensor; and adjust an illumination parameter associated with said selected one of said light sources based on said measured intensity of light.