Patent ID: 7768487

Claim:
A driving system for an electro-luminescence display device, comprising: an organic light emitting diode (OLED) panel comprising a plurality of pixels, the pixels comprising a red pixel, a green pixel and a blue pixel; a controller receiving a first digital data and converting the first digital data to a second digital data for a gray scale display, wherein the controller comprises: a single look up table applied to the first digital data and storing a plurality of index values, and a scan control unit that receives the first digital data signal and provides a control signal to a scan driver, wherein the first digital data comprises a red data signal, a green data signal and a blue data signal, and the single look up table is configured to match each index value to each of the first digital data, independent of each of the first digital data being the red, green, or blue data signal such that the red, green and blue data signals having an identical bit stream are converted to an identical index value; a frame memory unit receiving the second digital data from the controller and storing the second digital data; and a level shift unit converting the second digital signal to a data voltage and supplying the data voltage to the pixels, the level shift unit operable to determine and provide a different source voltage according to a gamma curve to the red pixel, the green pixel and the blue pixel, respectively, thereby controlling the gamma curve without a unit to generate a gamma voltage.