Calibration device and method and organic light-emitting display including the same

A calibration method for an organic light-emitting display, in which test currents are applied to sensing blocks by using a plurality of discrete current sources, the calibration method comprising:

• obtaining sensing data for first calibration by respectively connecting a first source driver IC to a first discrete current source, a second source driver IC to a second discrete current source, and a third source driver IC to a third discrete current source, during a first sensing period;
• obtaining sensing data for second calibration by respectively connecting the first source driver IC to the second discrete current source, the second source driver IC to the third discrete current source, and the third source driver IC to a fourth discrete current source, during a second sensing period subsequent to the first sensing period;
• and
• comparing the sensing data for at least two calibrations to extract correction values for compensating for variations between the discrete current sources and to correct the sensing data for the at least two calibrations with the correction values.

A calibration device for minimizing an error and a tack time in calibrating an organic light emitting display, comprising:

• a plurality of sensing blocks outputting sensing data for at least two calibrations through an analog-to-digital converter corresponding to a plurality of test currents in a calibration mode;
• a calibration block applying the plurality of test currents to the sensing blocks, wherein the test currents are selectively applied to the sensing blocks through at least two discrete current sources in the calibration mode;
• and
• a timing controller calculating a pixel compensation value for compensating for variations in electrical characteristics of pixels based on the sensing data in a sensing mode and compensating for input image data based on the pixel compensation value.