Patent ID: 9142171
Filing Date: 2015-09-22
Classification: G09G

Abstract:
1. A display device, comprising: a liquid crystal panel assembly including a thin film transistor array panel having a pixel electrode and a common electrode panel having a common electrode applied with a common voltage and divided into a display area having pixels and an edge region enclosing the display area; an additional, distinct AC electrode formed in the edge region of the common electrode panel and applied with an AC voltage; an additional, distinct reference electrode formed in the edge region of the thin film transistor array panel opposite the AC electrode and applied with the common voltage; an AC voltage generator configured to generate the AC voltage and to transmit the AC voltage to the AC electrode; and a signal controller configured to transmit a control signal to the AC voltage generator, wherein the control signal is generated when a temperature of the edge region is higher than a threshold temperature, and wherein the AC voltage generator generates the AC voltage based on the control signal, wherein the AC voltage generator comprises: an AC voltage generating circuit configured to generate a +AVDD voltage and a −AVDD voltage; and a waveform formation circuit forming an AC waveform comprising the +AVDD voltage and the −AVDD voltage, wherein the waveform formation circuit comprises: a high voltage switching transistor configured to apply the +AVDD voltage to the AC electrode; a low voltage switching transistor configured to apply the −AVDD voltage to the AC electrode; and a driver transmitting a gate signal to the high voltage switching transistor and the low voltage switching transistor.