Patent ID: 7199406
Filing Date: 2007-04-03
Classification: G09G,H01L

Abstract:
1. An image display device including a plurality of data lines for transmitting data currents which display image signals, a plurality of scan lines for transmitting select signals, and a plurality of pixel circuits formed at a plurality of pixels defined by the data lines and the scan lines, wherein the pixel circuit comprises: a first transistor having a first electrode, a second electrode, and a capacitor between the first and second electrodes, the first transistor outputting a current which corresponds to a voltage, applied between the first and second electrodes, to a third electrode; a display element, coupled to the third electrode of the first transistor, for displaying an image in correspondence to an amount of the applied current; a second transistor having a first electrode coupled to the first electrode of the first transistor, a second electrode, and a third electrode, the second transistor being diode-connected; and a switch for transmitting a voltage applied to the data line to the second transistor in response to a select signal applied to the scan line, wherein the third electrode of the second transistor is coupled to the first electrode through a contact hole, and the contact hole is formed above a channel in a semiconductor layer.