Patent ID: 8379008

Claim:
An organic light emitting display device comprising: a first module and a second module, each comprising an organic light emitting display panel and a driving source; a controller for applying a common control signal and a data signal to the first module and the second module and for applying a selection signal for selecting at least one module to be activated from among the first module and the second module; and a power supply for supplying a first driving voltage to the first module as a first power when the first module is selected and the second module is not selected, and for supplying a second driving voltage to the second module as the first power when the second module is selected and the first module is not selected, wherein the power supply comprises: a voltage divider for receiving an input voltage and selectively dividing the input voltage in order to generate the first driving voltage for the first module and the second driving voltage for the second module; and a DC/DC converter for outputting a voltage at a level corresponding to the divided input voltage, wherein the power supply is adapted to supply the voltage output from the DC/DC converter to the first module and the second module, and wherein when the selection signal of the controller is adapted to select both the first module and the second module, the power supply is adapted to supply a common driving voltage to both the first module and the second module as the first power.