Patent ID: 6489631
Filing Date: 2002-12-03
Classification: G09G,H01L

Abstract:
A light-emitting display device comprising on a substrate an array of addressable pixels each comprising a light-emitting display element having a layer of light-emitting material with a transparent electrode on one side thereof, and a light sensing element responsive to light emitted by the display element, wherein each light sensing element is a gated photosensitive thin film device comprising a semiconductor layer having contact regions laterally spaced on the substrate and an intervening gate controlled region over which dielectric material is disposed, and wherein a part of the light-emitting display element extends over the dielectric material and the gate controlled region such that the transparent electrode of the light-emitting display element at that part serves as the gate of the photosensitive device and light emitted by the light-emitting material layer is incident on the semiconductor layer.