Patent ID: 9153160
Filing Date: 2015-10-06
Classification: G09G

Abstract:
1. An organic light emitting diode display device comprising: an image display panel comprising a plurality of pixel regions; and a driving integrated circuit that converts digital image data into an analog image signal, generates a plurality of gamma voltage levels through modulation, for overdriving or accelerated driving of the analog image signal, and modulates gray levels of the digital image data such that the modulated gray levels correspond to the modulated gamma voltage levels, for display of an image according to the modulated image data on the image display panel, wherein the driving integrated circuit comprises: a first data modulator that primarily modulates the digital image data in a frame rate control (FRC) manner to render all gray levels of the digital image data by gamma voltage levels between a minimum gamma voltage and a predetermined reference voltage; a second data modulator that compares the primarily modulated image data with image data of a previous frame, and outputs a predetermined secondarily modulated image data in accordance with results of the comparison; a timing controller that controls driving timing of gate lines and driving timing of data lines, and sets gamma voltages between the minimum gamma voltage and the predetermined reference voltage, and gamma voltages higher than the predetermined reference voltage; and a gamma voltage generator that generates the gamma voltages between the minimum gamma voltage and the predetermined reference voltage and the gamma voltages higher than the predetermined reference voltage in accordance with a gamma voltage setting signal from the timing controller.