公开(公告)号：US20190131376A1

公开(公告)日：2019-05-02

申请号：US16163779

申请日：2018-10-18

Applicant: LG Display Co., Ltd.

Inventor： Yewon HONG ,  SungSoo SHIN ,  Hyelim JI ,  Sohee CHOI

IPC: H01L27/32 ,  G09G3/3266 ,  G09G3/3275

Abstract: A display apparatus includes a plurality of pixels each including an organic light emitting device and a pixel driving circuit. The pixel driving circuit includes a driving transistor controlling a driving current flowing in the organic light emitting device and a first, second, third, fourth, and fifth switching transistor, the third switching transistor selectively connecting a second node which is a drain electrode of the driving transistor to a third node which is a gate electrode of the driving transistor. The third switching transistor differs from a type of each of the driving transistor and the first, second, fourth, and fifth switching transistors. Accordingly, even when the organic light emitting display apparatus is driven at a low frequency, a bezel area is reduced, and a high resolution of a display panel is realized.

公开(公告)号：US20180357964A1

公开(公告)日：2018-12-13

申请号：US16005358

申请日：2018-06-11

Applicant: LG Display Co., Ltd.

Inventor： Sungsoo SHIN ,  Sohee CHOI ,  Yewon Hong

IPC: G09G3/3258 ,  H01L27/32

CPC classification number: G09G3/3258 ,  G09G2300/0819 ,  G09G2310/0289 ,  G09G2310/08 ,  G09G2320/0219 ,  H01L27/1225 ,  H01L27/1251 ,  H01L27/1255 ,  H01L27/3262 ,  H01L27/3265 ,  H01L29/78675 ,  H01L29/7869

Abstract: An electroluminescent display including pixels arranged in a matrix is disclosed. Each pixel includes a pixel circuit configured to sample a threshold voltage of a driving element for driving a light emitting element and compensate for a data voltage. The pixel circuit includes a first switch element connected to a data voltage path supplied with the data voltage, a second switch element connected to a reference voltage path supplied with a predetermined reference voltage, a third switch element connected between a gate of the driving element and the first and second switch elements, a fourth switch element connected to an initialization voltage path supplied with a predetermined initialization voltage, and a fifth switch element connected to a power path supplied with a predetermined pixel driving voltage higher than the reference voltage and the initialization voltage.

公开(公告)号：US20180151099A1

公开(公告)日：2018-05-31

申请号：US15821359

申请日：2017-11-22

Applicant: LG Display Co., Ltd.

Inventor： Sohee CHOI ,  Namyong GONG ,  Sungsoo SHIN

IPC: G09G3/00 ,  G09G3/3233 ,  H01L27/12 ,  H01L29/786

CPC classification number: G09G3/006 ,  G09G3/3233 ,  G09G2300/0814 ,  G09G2310/08 ,  G09G2330/10 ,  H01L27/1222 ,  H01L27/1225 ,  H01L29/78672

Abstract: A display device is disclosed. The display device includes subpixels including data lines, scan lines, and one or more thin film transistors (TFTs). The display device includes a second switching TFT configured to output a reference signal input through a drain node to a source node according to a second scan signal input through a gate node, a first switching TFT configured to have a drain node connected to the source node of the second switching TFT, and form a current path such that the reference signal input through the drain node is transmitted to the data line according to a first scan signal input to a gate node, and an integrated circuit (IC) unit configured to sense a voltage of a current transmitted to the data line through the first switching TFT and sense a threshold voltage of the first switching TFT based on the sensed voltage.

公开(公告)号：US20180144685A1

公开(公告)日：2018-05-24

申请号：US15806806

申请日：2017-11-08

Applicant: LG Display Co., Ltd.

Inventor： Namyong GONG ,  Sohee CHOI

IPC: G09G3/3233 ,  H01L27/32

CPC classification number: G09G3/3233 ,  G09G2300/0417 ,  G09G2300/043 ,  G09G2300/0814 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0291 ,  G09G2320/029 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2340/0435 ,  H01L27/1225 ,  H01L27/1251 ,  H01L27/3262 ,  H01L29/78648 ,  H01L29/78672 ,  H01L29/7869

Abstract: A display device is provided in which each subpixel includes a driving TFT, an organic light-emitting diode, and at least one switching TFT for driving the subpixel. At least one of the driving TFT and the switching TFT is formed as a double-gate TFT having a first gate node and a second gate node, and each subpixel comprises a compensation circuit that senses a threshold voltage of the double-gate TFT and applies the same to the first gate node or the second gate node of the double-gate TFT.