Patent ID: 8325113

Claim:
An organic electroluminescent display device, comprising: a power supply unit that outputs a driving voltage, a base voltage and a reference voltage; a source driving unit that outputs a data voltage; a gate driving unit that outputs a positive scan signal and a negative scan signal; a timing control unit that controls the source driving unit and the gate driving unit; and a display unit that receives the driving voltage, the base voltage, the reference voltage, the positive scan signal and the negative scan signal, the display unit including an organic light-emitting diode that has driving currents depending on the data voltage, wherein the reference voltage is lower than the positive scan signal, and the negative scan signal is lower than the reference voltage, wherein the reference voltage satisfies a relation of −[(Vg+H)−(Vg+L)]<Vref<Vg+L, wherein Vref is the reference voltage, Vg+H is a high level voltage of the positive scan signal, and Vg+L is a low level voltage of the positive scan signal.