Patent ID: 7064733

Claim:
A light emitting image display, comprising: a) a substrate; b) an array of addressable light emitters formed on the substrate, the light emitters comprising a light emissive layer and electrode layers on either side of the light emissive layer which are deposited on the substrate; c) a drive circuit for driving the light emitters to emit light in an imagewise pattern; d) one or more photo-sensors formed on the substrate, the photo-sensor comprising a photo-sensor layer and electrode layers on either side of the photo-sensor layer which are deposited on the substrate, and the photo-sensor layer being directly optically coupled to the emissive layer of the light emitters in the array to detect light emitted by the light emitters and to generate a feedback signal in response thereto; and e) a feedback control circuit responsive to the feedback signal for controlling the drive circuit to control the desired light output for each brightness level of the display.