发明名称 |
Organic light emitting display device and method for driving the same |
摘要 |
An organic light emitting display device includes a display panel having a plurality of pixels, each pixel connected to a data line, a gate line group and a reference line, each pixel further including: an organic light emitting device; a driving transistor controlling a current flowing in the organic light emitting device and including first and second gate electrodes overlapped with each other, with a semiconductor layer provided therebetween; a first switching transistor selectively supplying a data voltage supplied to the data line to a first node connected to the first gate electrode; a second switching transistor selectively supplying a sensing voltage to the second gate electrode; a third switching transistor selectively connecting a second node connected to a source electrode of the driving transistor to the first node; a fourth switching transistor selectively connecting the reference line to the second node; a first capacitor connected between the second gate electrode and the second node, the first capacitor storing a threshold voltage of the driving transistor; and a second capacitor connected between the first and second nodes, the second capacitor storing a difference voltage of the first and second nodes. |
申请公布号 |
US9305494(B2) |
申请公布日期 |
2016.04.05 |
申请号 |
US201414534937 |
申请日期 |
2014.11.06 |
申请人 |
LG Display Co., Ltd. |
发明人 |
Shim Jong Sik;Bae Na Young |
分类号 |
G09G3/32 |
主分类号 |
G09G3/32 |
代理机构 |
Dentons US LLP |
代理人 |
Dentons US LLP |
主权项 |
1. An organic light emitting display device, comprising:
a display panel having a plurality of pixels, each pixel connected to a data line, a gate line group and a reference line, each pixel further including: an organic light emitting device; a driving transistor controlling a current flowing in the organic light emitting device and including first and second gate electrodes overlapped with each other, with a semiconductor layer provided therebetween; a first switching transistor selectively supplying a data voltage supplied to the data line to a first node connected to the first gate electrode; a second switching transistor selectively supplying a sensing voltage to the second gate electrode; a third switching transistor selectively connecting a second node connected to a source electrode of the driving transistor to the first node; a fourth switching transistor selectively connecting the reference line to the second node; a first capacitor connected between the second gate electrode and the second node, the first capacitor storing a threshold voltage of the driving transistor; and a second capacitor connected between the first and second nodes, the second capacitor storing a difference voltage of the first and second nodes. |
地址 |
Seoul KR |