Patent ID: 7683981
Filing Date: 2010-03-23
Classification: G02F,G09G,H01L

Abstract:
1. A light emitting diode substrate, comprising: a plurality of driving thin film transistors including a semiconductor layer deposited on a substrate; a plurality of light emitting diodes mounted respectively on the plurality of driving thin film transistors, for generating lights of different wavelengths; a plurality of thin film sensors formed between the plurality of light emitting diodes and the substrate, for sensing the luminous intensities of the plurality of light emitting diodes; and a luminance control circuit having a plurality of controlling thin film transistors including a semiconductor layer deposited on the substrate and being connected to the plurality of thin film sensors to control the driving thin film transistors, wherein each of the plurality of driving thin film transistors and the controlling thin film transistors of the luminance control circuit includes a semiconductor layer, a gate electrode overlapping the semiconductor layer with an insulating layer disposed therebetween, and source and drain electrodes connected to two ends of the semiconductor layer, and wherein the gate electrode of each of the plurality of driving thin film transistors is connected to the luminance control circuit, the source electrode is connected to one electrode of each of the light emitting diodes, and the drain electrode is connected to a driving voltage supply line for supplying a driving voltage from the exterior.