Patent ID: 7920108

Claim:
An organic electroluminescence display comprising: a pixel unit comprising pixels to display an image; a data driving unit connected to the pixels to generate display signals in the pixels; and a scan driving unit to generate a current corresponding to the display signals in the pixels; wherein the data driving unit comprises: a first switch unit to select a first reference voltage to correspond to a data signal; a second switch unit to select a second reference voltage to correspond to the data signal; a resistor including a plurality of resistor arrays to receive the first reference voltage and the second reference voltage and to distribute the first reference voltage and the second reference voltage by use of at least two resistances to generate a grey level voltage; a third switch unit to select one resistor array out of the plurality of resistor arrays to correspond to the data signal and to transmit the first reference voltage and the second reference voltage to the selected resistor array; a fourth switch unit to output the grey level voltage, generated by the resistor array, to correspond to the data signal; a MUX circuit connected between the fourth switch unit and a plurality of data lines, to select one data line out of the plurality of data lines to transmit the grey level voltage; and a precharge circuit connected between the fourth switch unit and the plurality of the data lines to select one voltage out of the first reference voltage and the second reference voltage to precharge the selected data line with the selected voltage, and wherein a sum of ON resistances of the second and third switch units is identical to an ON resistance of the first switch unit.