Patent ID: 9685119
Date: 2017-06-20
CPC Classifications: G09G

Claim:
1. An organic light emitting display comprising: a display panel with a plurality of pixels, each pixel comprising an organic light emitting diode (OLED) and a driving thin film transistor (TFT) for controlling an amount of light emission of the OLED and being connected to any one of data lines, any one of gate lines, and any one of sensing lines; a gate driving circuit that generates a sensing gate pulse corresponding to one line sensing ON time defined by a ON pulse region of the sensing gate pulse in a sensing operation and sequentially supplies the sensing gate pulse to the gate lines in a line sequential manner, wherein the sensing operation includes an initialization, a sensing, and a sampling performed in an initialization period, a sensing period, and a sampling period, respectively; a data driving circuit comprising: an analog-to-digital converter (ADC) that converts the integrated value stored in the holding capacitor into a digital sensed value; and a timing controller that controls the gate driving circuit and data driving circuit to perform the integration of the source-drain current and derives a threshold voltage variation and a mobility variation of the driving TFT using the digital sensed value.