Patent ID: 6778163
Filing Date: 2004-08-17
Classification: G09G

Abstract:
A liquid crystal display device, comprising:a scanning line to which an on-voltage is applied and then an off-voltage is applied; a liquid crystal capacitor having a liquid crystal sandwiched between a counter electrode and a pixel electrode; a D/A converter that applies a voltage, which corresponds to gray scale data indicating a gray level and to a writing polarity of a voltage applied to said liquid crystal, the voltage being applied to a data line when an on-voltage is applied to said scanning line; a switching element disposed between said data line and said pixel electrode, said switching element being turned on when the on-voltage is applied to said scanning line, and being turned off when an off-voltage is applied; and a storage capacitor having first terminal connected to said pixel electrode and second terminal, wherein, when the writing polarity of a voltage applied to said liquid crystal during a period in which the on-voltage is applied to said scanning line is equivalent to that of positive-polarity writing, the voltage of second terminal is shifted to a high level when the off-voltage is applied to said scanning line, and when the writing polarity of a voltage applied to said liquid crystal during a period in which the on-voltage is applied to said scanning line is equivalent to that of negative-polarity writing, the voltage of the second terminal is shifted to a low level when the off-voltage is applied to said scanning line the voltage applied to the second terminal when the on-voltage is applied to the scanning line being different from the voltage applied to the second terminal when the off-voltage is applied to the scanning line.