Patent ID: 7304622
Filing Date: 2007-12-04
Classification: G09G,H03K

Abstract:
1. An active matrix type liquid crystal display device comprising: pixel electrodes that are arranged in a matrix and that are driven by pixel transistors respectively; a plurality of gate lines that are connected, in a column-by-column fashion, to gate electrodes of the pixel transistors; a plurality of source lines that are connected, in a row-by-row fashion, to source electrodes of the pixel transistors; a gate driver that, sequentially during one selection period after another, connects one of the gate lines after another to an output point of a selection voltage feed circuit; and a source driver that feeds an image signal to the source lines, wherein the selection voltage feed circuit has: a first power source for feeding a predetermined selection voltage; a diode; and a switch, wherein the switch is provided between the first power source and the output point of the selection voltage feed circuit, and the diode has an anode thereof connected to a second power source and having a cathode thereof connected between the output point of the selection voltage feed circuit and the switch, and wherein the switch being kept on from a start of the selection period for a time span shorter than the selection period.