Patent ID: 8570251

Claim:
An organic electroluminescent display device comprising: a plurality of scan lines arranged in a row direction; a plurality of data lines arranged in a column direction; a plurality of pixels formed at intersections between the plurality of scan lines and the plurality of data lines; and a direct current (DC)-DC converter to supply a power supply voltage to the plurality of pixels, wherein the DC-DC converter comprises a set resistor, and is configured to convert one reference voltage selected according to a set voltage determined by the set resistor into a power supply voltage and is configured to supply the power supply voltage to the plurality of pixels, wherein the DC-DC converter further comprises: a reference voltage generating unit configured to generate a plurality of reference voltages; a reference voltage selecting unit configured to select the one reference voltage from among the plurality of reference voltages according to the set voltage determined by the set resistor; and a power supply voltage generating unit configured to convert the selected one reference voltage into the power supply voltage to be supplied to the plurality of pixels.