公开(公告)号：US20150187276A1

公开(公告)日：2015-07-02

申请号：US14534937

申请日：2014-11-06

Applicant: LG DISPLAY CO., LTD.

Inventor： Jong Sik SHIM ,  Na Young BAE

IPC: G09G3/32

CPC classification number: G09G3/3291 ,  G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0814 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2310/0251 ,  G09G2310/0264 ,  G09G2320/0219 ,  G09G2320/0233

Abstract: 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.

Abstract translation: 有机发光显示装置包括具有多个像素的显示面板，每个像素连接到数据线，栅极线组和参考线，每个像素还包括：有机发光器件; 驱动晶体管，其控制在所述有机发光器件中流动的电流，并且包括彼此重叠的第一和第二栅电极，其间设置有半导体层; 第一开关晶体管，选择性地将提供给所述数据线的数据电压提供给连接到所述第一栅电极的第一节点; 选择性地向第二栅电极提供感测电压的第二开关晶体管; 选择性地将连接到所述驱动晶体管的源电极的第二节点连接到所述第一节点的第三开关晶体管; 选择性地将参考线连接到第二节点的第四开关晶体管; 连接在所述第二栅电极和所述第二节点之间的第一电容器，所述第一电容器存储所述驱动晶体管的阈值电压; 以及连接在第一和第二节点之间的第二电容器，第二电容器存储第一和第二节点的差分电压。