Patent ID: 8704800
Filing Date: 2014-04-22
Classification: G02F,G06F

Abstract:
1. A driving method of a photo element, the photo element comprising a capacitor, a charge thin-film transistor, a photo thin-film transistor, a readout line, and a switch thin-film transistor, the gate of the charge thin-film transistor being connected to a first gate line, the drain of the charge thin-film transistor being connected to the first gate line, the source of the charge thin-film transistor being connected to an input terminal of the capacitor, the drain of the photo thin-film transistor being connected to a second gate line, the source and the gate of the photo thin-film transistor being connected to a output terminal of the capacitor, the source of the switch thin-film transistor being connected to the readout line, the gate of the switch thin-film transistor being connected to a first gate line, and the drain of the switch thin-film transistor being connected to the output terminal of the capacitor and the source and the gate of the photo thin-film transistor, during a frame the driving method comprising the steps of: providing a high voltage to the first gate line to open the switch thin-film transistor and the charge thin-film transistor, whereby the first gate line provides the high voltage to the capacitor and a output voltage of the capacitor is read through the readout line; providing a low voltage to the first gate line to close the switch thin-film transistor and the charge thin-film transistor and the high voltage to the second gate line, whereby the high voltage applied a reverse-biased voltage to the photo thin-film transistor; and providing the low voltage to the first gate line and the second gate line until the end of the frame.