Patent ID: 9466243
Filing Date: 2016-10-11
CPC Classification: G09G

Claim Text:
1. An organic light emitting diode display device comprising a plurality of pixels arranged in a matrix form, each of the pixels comprising: a driving thin film transistor (TFT) including a gate electrode coupled to a first node, a source electrode coupled to a second node, and a drain electrode coupled to a high-potential voltage line; an organic light emitting diode between the second node and a low-potential voltage line; a first TFT configured to connect a data line to the first node during a data voltage supply period of a frame period; an initialization control circuit coupled between the first node and a first reference voltage line supplying a first reference voltage, the initialization control circuit further connected to a second node, a third node and a second reference voltage line supplying a second reference voltage, the initialization control circuit configured to initialize the first node to the first reference voltage, during an initialization period of the frame period preceding the data voltage supply period, the initialization control circuit configured to initialize the second and third nodes to a second reference voltage during the initialization period, the initialization control circuit comprising: a first capacitor coupled between the first node and the third node, the first capacitor configured to store a voltage difference between the first node and the third node during the initialization period, and change a voltage level of the first node based on a voltage level of the third node in a threshold voltage sensing period between the initialization period and the data voltage supply period.