Patent ID: 7199396
Filing Date: 2007-04-03
Classification: G02F,H01L

Abstract:
1. An active matrix of thin-film transistors (TFTs) for an optical sensor or display screen, comprising: a substrate; a matrix of TFT transistors formed on the substrate, each TFT comprising a gate, a first electrode or drain and a second electrode or source; a set of row electrodes placed on the substrate for controlling the TFTs via the gates; a conducting level in a defined pattern forming a matrix of pixel electrodes being connected to one of the electrodes of the TFTs; a set of columns configured to transfer charges through the TFTs between the pixel electrodes and drive electronics, the columns being connected to the other electrode of the TFTs; and an insulating layer between the pixel electrodes and the columns, the insulating layer being open locally to each pixel in order to bring the pixel electrode into contact with the other electrode of the TFT; a set of capacitive electrodes lying at the same level as the electrodes of the TFTs so as to form, with the pixel electrodes, storage capacitors, additional storage lines lying at the same level as the gates of the TFTs and parallel to the columns, the additional storage lines forming, with the capacitive electrodes, storage capacitors.