Patent ID: 7714826
Filing Date: 2010-05-11
Classification: G09G

Abstract:
1. A liquid crystal display (LCD) device, comprising: an LCD panel having a plurality of data lines, and a plurality of gate lines crossing the data lines; a gate driving circuit to sequentially supply scanning pulses to the plurality of gate lines; a data driving circuit to generate a data voltage; a demultiplexer to apply the data voltage from the data driving circuit to the plurality of data lines using a plurality of switching devices; a control signal generator to generate a plurality of control signals having a first polarity of voltage in order to turn on the switching devices of the demultiplexer and a second polarity of voltage in order to compensate a positive stress caused by the first polarity of voltage, wherein the positive stress is to be happened to the switching devices of the demultiplexer by the first polarity of voltage, wherein the first polarity of voltage is a positive voltage whereas the second polarity of voltage is a negative voltage and wherein the negative voltage is a lower voltage than a gate low voltage (Vgl) of the scanning pulses, and wherein a negative stress amount caused by the second polarity of voltage is “k” times as large as a positive stress amount caused by the first polarity of voltage, wherein “k” satisfies a condition of“0<k≦10”, wherein “k”must be larger than 1 if the data voltage goes close to the gate low voltage.