Patent ID: 8717256

Claim:
An organic light emitting display device, comprising: a display panel for receiving an image data and an input voltage and displaying an image in accordance with the image data and the input voltage; a driving integrated circuit (IC) for supplying the image data to the display panel, receiving the input voltage, and outputting an offset control signal in accordance with the received input voltage; and a power supply for controlling the input voltage in accordance with the offset control signal, and supplying the controlled input voltage to the display panel, wherein the driving IC comprises: an input voltage detector for detecting the input voltage; an offset comparator for comparing a voltage value of the input voltage with a set voltage value to provide a compared result, and outputting the offset control signal to the power supply in accordance with the compared result; and a check-sum unit for outputting a clock signal for controlling the offset comparator in accordance with a write command from a host.