Liquid-crystal display device and driving method thereof

An active-matrix addressing LCD device comprising:

• a panel including an active-matrix substrate, an opposite substrate, and a liquid crystal layer sandwiched by the active-matrix substrate and the opposite substrate;
• the active-matrix substrate having data lines, gate lines that intersect with the data lines at intersections, pixels arranged near the respective intersections, and TFTs arranged as switching elements for the respective pixels;
• a source driver circuit for driving the data lines;
• a gate driver circuit for driving the scanning lines;
• and
• a controller circuit for controlling the source driver and the gate driver;
• wherein a polarity of a data voltage applied to each of the pixels by way of a corresponding one of the data lines and a corresponding one of the, TFTs is inverted in every set of two or more horizontal synchronizing periods by the controller circuit;
• and wherein the source driver has a polarity inverting means for inverting the polarity of the data voltages outputted by the source driver circuit in a blanking period of each of the horizontal synchronizing periods of the set.

A method of driving an active-matrix addressing LCD device, the device comprising:

• a panel including an active-matrix substrate, an opposite substrate, and a liquid crystal layer sandwiched by the active-matrix substrate and the opposite substrate;
• the active-matrix substrate having data lines, scanning lines that intersect with the data lines at intersections, pixels arranged near the respective intersections, and TFTs arranged as switching elements for the respective pixels;
• a source driver circuit for driving the data lines;
• a gate driver circuit for driving the scanning lines;
• and
• a controller circuit for controlling the source driver and the gate driver;
• the method comprising:
• inverting a polarity of a data voltage applied to each of the pixels by way of a corresponding one of the data lines and a corresponding one of the TFTs in every set of two or more horizontal synchronizing periods;
• and
• resetting the data voltages outputted by the source driver circuit in a blanking period of each of the horizontal synchronizing periods of the set.

A method of driving an active-matrix addressing LCD device, the device comprising:

• a panel including an active-matrix substrate, an opposite substrate, and a liquid crystal layer sandwiched by the active-matrix substrate and the opposite substrate;
• the active-matrix substrate having data lines, scanning lines that intersect with the data lines at intersections, pixels arranged near the respective intersections, and TFTs arranged as switching elements for the respective pixels;
• a source driver circuit for driving the data lines;
• a gate driver circuit for driving the scanning lines;
• and
• a controller circuit for controlling the source driver and the gate driver;
• the method comprising:
• inverting a polarity of a data voltage applied to each of the pixels by way of a corresponding one of the data lines and a corresponding one of the TFTs, in every set of two or more horizontal synchronizing periods;
• and
• inverting the polarity of the data voltages outputted by the source driver circuit in a blanking period of each of the horizontal synchronizing periods of the set.