GRADATION VOLTAGE GENERATOR AND DISPLAY DEVICE CAPABLE OF INDEPENDENTLY CONTROLLING A MIDDLE LEVEL GRADATION VOLTAGE

摘要

PURPOSE: A gradation voltage generator and display device are provided to supply high-quality images by constantly maintaining a color coordinate, inner kick-back voltage and gamma voltage when the highest and lowest reference voltages change.;CONSTITUTION: A first reference voltage select unit(410) selectively outputs the highest and second highest reference voltages and the lowest and second lowest reference voltages. A second reference select unit(430) outputs a first gradation voltage and N-1 gradation voltage by receiving the highest and lowest reference voltages. A gamma voltage select unit(450) produces a plurality of gamma voltage by receiving the highest and lowest reference voltages. A gradation distributor(470) produces a second gradation voltage through N-2 gradation voltage by receiving a plurality of gamma voltage.;COPYRIGHT KIPO 2012