Organic light emitting display with pixel sensing circuit and driving method thereof

An organic light emitting display comprising:

• a plurality of pixels at crossing regions of data lines, scan lines, and light emitting control lines;
• a sensing unit for sensing deterioration information of organic light emitting diodes and threshold voltage and mobility information of driving transistors respectively included in the pixels;
• a converting unit for storing the deterioration information of the organic light emitting diodes and the threshold voltage and mobility information of the driving transistors that are sensed by the sensing unit, and converting input data into calibration data according to the deterioration information and the threshold voltage and mobility information;
• and
• a data driver for receiving calibration data output from the converting unit to generate a data signal,
• wherein the sensing unit comprises:
• a sensing circuit comprising a current source unit coupled to a channel to supply a current, one or more current sink units for sinking a current, and a precharge voltage source for supplying a precharge voltage;
• and
• at least one analog-digital converter for converting the deterioration information of the organic light emitting diodes supplied from the sensing circuit into first digital values and converting the threshold voltage and mobility information of the driving transistors into second digital values.