Display device and driving method thereof

摘要

An object of the invention is to provide a display device and a driving method thereof, in which uniformity of a video image displayed after charge sharing does not deteriorate. In a first horizontal period, a positive voltage and a negative voltage according to a video signal are alternately applied to source signal lines, and then, reset voltages of +5V and −5V are respectively applied to source signal lines. As a result, the voltages of the source signal lines become +5V or −5V. In this state, when the source signal lines to which +5V and −5V are applied are short-circuited in the beginning of a second horizontal period, charge sharing is performed between the source signal lines, and the voltages of these source signal lines become 0V. Subsequently, when the voltage according to the video signal is applied, the liquid crystal display device can display a color video image having reduced display unevenness and high uniformity.

主权项

1. An active matrix-type display device comprising:
a display unit having a plurality of data signal lines, a plurality of scanning signal lines intersecting the plurality of data signal lines, and a plurality of pixels arranged in a matrix form at respective intersections of the plurality of data signal lines and the plurality of scanning signal lines; a scanning signal line drive circuit sequentially selecting and activating the plurality of scanning signal lines; a data signal line drive circuit which alternately applies a positive voltage and a negative voltage to the data signal lines; and a plurality of discharge circuits connecting the data signal lines to which the positive voltage is applied and the data signal lines to which the negative voltage is applied, the number of the data signal lines to which the positive voltage is applied being equal to the number of the data signal lines to which the negative voltage is applied, wherein the data signal line drive circuit alternately applies the positive voltage and the negative voltage according to the video signal to the data signal lines, and then applies first reset voltages whose absolute values are equal, and whose polarities are the same as those of the voltages according to the video signal to each of the data signal lines, and after the first reset voltages are applied to the data signal lines every horizontal period, the discharge circuit short-circuits the data signal lines connected to the discharge circuit.