Patent ID: 8378936

Claim:
A display apparatus comprising: a display panel that comprises a plurality of gate lines, a plurality of voltage lines, and a plurality of pixels and displays an image; a timing controller that processes image data, the timing controller comprising: a panel controller that outputs the image data in synchronization with a first control signal; and a brightness controller that detects a variation from one frame to the next in a sum of gray scale values of the image data (hereinafter, referred to as local image data) corresponding to selected plural regions of the display panel, and outputs a second control signal to control a brightness of the display panel according to a duration at which the variation remains below a predetermined value; and a panel driver that drives the display panel in response to the first control signal and the image data, and controls a brightness of the display panel in response to the second control signal, wherein the panel driver comprises a voltage generator that receives the second control signal from the timing controller and supplies a driving voltage to the voltage lines, and wherein the voltage generator adjusts a voltage level of the driving voltage in response to the second control signal, thereby controlling the brightness of the display panel.