Patent ID: 7911427

Claim:
A data driving circuit for driving a pixel of an organic light emitting display based on externally supplied data for the pixel, wherein the pixel is electrically connectable to the driving circuit via a data line, the data driving circuit comprising: a current sink, the current sink receiving a predetermined current from the pixel during a first partial period of a complete period for driving the pixel; a voltage generator, the voltage generator respectively setting values of a plurality of gray scale voltages using a compensation voltage generated by the pixel when the predetermined current is received by the current sink, the compensation voltage being supplied from the current sink to the voltage generator; a digital-analog converter, the digital-analog converter selecting, as a data signal for driving the pixel during the complete period, one of the plurality of set gray scale voltages based on a bit value of a portion of the externally supplied data associated with the pixel; and at least one switching unit, the switching unit supplying the selected data signal to the data line during any partial period of the complete period elapsing after the first partial period of the complete period, wherein: a value of the predetermined current being equal to or higher than a value of a minimum current employable by the pixel to emit light of maximum brightness; and the maximum brightness corresponding to a brightness of the pixel when a highest one of the plurality of set gray scale voltages is applied to the pixel.