Organic light emitting display for compensating for variations in electrical characteristics of driving element

摘要

An organic light emitting display is provided which offers shorter sensing time and higher sensing accuracy when sensing variations in electrical characteristics of a driving element. The organic light emitting display comprises a display panel with a plurality of pixels, a gate driving circuit and a data driving circuit. the gate driving circuit generates a sensing gate pulse corresponding to one line sensing ON time in a sensing operation and sequentially supplies the same to gate lines (15) in a line sequential manner. The data driving circuit comprises a plurality of current integrators (CI) that perform an integration of the source-drain current of the driving TFT (DT) of each pixel input through the sensing lines and an ADC that sequentially digitizes the output of the current integrators (CI) to output digital sensed values. A timing controller controls the operations of the gate driving circuit and the data driving circuit such that integrations of first and second source-drain currents are performed in respective sensing and sampling periods within one line sensing ON time, the first and second source-drain currents being caused by sensing data voltages of a first level and a second level.