Gray scale voltage generator and light emitting display using the same

摘要

The present invention provides a gamma-corrected gradation voltage generation device that can have an optimal display characteristic based on display characteristics of a display panel.;The gray voltage generator according to the present invention is a gray voltage generator for applying to a display panel. The gamma correction unit outputs gamma correction data based on display characteristics of the display panel, and the intermediate voltage unit receives the first and second voltages based on the gamma correction data of the gamma correction unit to correspond to the inflection points of the gamma curve of the display panel. Outputs a plurality of intermediate voltages. The gray voltage output unit receives the first and second voltages and the plurality of intermediate voltages and outputs each gray voltage based on the first and second voltages and the plurality of intermediate voltages. The intermediate voltage unit may include a first intermediate voltage selector and a second intermediate voltage selector. The first intermediate voltage selector determines and outputs a voltage value between a first voltage value and a second voltage value indicating a gray level corresponding to the first inflection point of the gamma curve, and the second intermediate voltage selector is connected to the second inflection point of the gamma curve. A second intermediate voltage indicating a corresponding gray scale is determined as a voltage value between the first voltage value and the first intermediate voltage and output.;Gamma correction, gradation voltage, light emitting display device