公开(公告)号：US11367381B2

公开(公告)日：2022-06-21

申请号：US17135928

申请日：2020-12-28

Applicant: LG Display Co., Ltd.

Inventor： Young-Sung Cho ,  Chui Nam ,  Byeong-Seong So ,  Hyung-Uk Jang

IPC: G09G3/30

Abstract: An electroluminescent display device has a plurality of pixels and each pixel includes a driving transistor having a gate connected to a first node, a source connected to a third node, and a drain connected to a fourth node, the driving transistor generating pixel current corresponding to a data voltage when a high-level source voltage is applied to the third node, an internal compensator comprising a first capacitor connected between the first node and a second node, and a second capacitor connected between the second node and an input terminal for the high-level source voltage, the internal compensator controlling a threshold voltage of the driving transistor with reference to a first scan signal, a second scan signal opposite to the first scan signal in phase, a third scan signal lagging the first scan signal in phase, a fourth scan signal leading the first scan signal in phase, and an emission signal, and a light emitting element connected between a fifth node to be connected to the fourth node and an input terminal for a low-level source voltage.

公开(公告)号：US11195461B2

公开(公告)日：2021-12-07

申请号：US17116770

申请日：2020-12-09

Applicant: LG Display Co., Ltd.

Inventor： Hyung-Uk Jang ,  Byeong-Seong So ,  Young-Sung Cho

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3275

Abstract: An electroluminescent display device having a plurality of pixels is disclosed. Each pixel includes a driving transistor having a gate connected to a first node, a source connected to a third node, and a drain connected to a fourth node, the driving transistor generating pixel current corresponding to a data voltage when a high-level source voltage is applied to the third node, a light emitting element connected between the fourth node and an input terminal for a low-level source voltage, an internal compensator controlling voltages of the first to fourth nodes in accordance with operations of a plurality of switching transistors in an initialization period, a data writing period and an emission period, and a refresh transistor configured to apply the high-level source voltage to the second node in accordance with a scan signal in a refresh period preceding an initialization period.

公开(公告)号：US11232756B2

公开(公告)日：2022-01-25

申请号：US17116750

申请日：2020-12-09

Applicant: LG Display Co., Ltd.

Inventor： Hyung-Uk Jang ,  Chul Nam ,  Byeong-Seong So ,  Young-Sung Cho

IPC: G09G3/3291 ,  G09G3/3266

Abstract: An electroluminescent display device having a plurality of pixels is disclosed. Each pixel includes a driving transistor having a gate connected to a first node, a source connected to a third node, and a drain connected to a fourth node, to generate pixel current corresponding to a data voltage when a high-level source voltage is applied to the third node, a light emitting element connected between the fourth node and an input terminal for a low-level source voltage, an internal compensator including first and second capacitors, and switching transistors, and a kick-back compensation transistor to apply a DC voltage higher than an initialization voltage to the first node in a kick-back compensation period between an initialization period and a data writing period.

公开(公告)号：US20210201759A1

公开(公告)日：2021-07-01

申请号：US17135928

申请日：2020-12-28

Applicant: LG Display Co., Ltd.

Inventor： Young-Sung Cho ,  Chul Nam ,  Byeong-Seong So ,  Hyung-Uk Jang

IPC: G09G3/30

Abstract: An electroluminescent display device has a plurality of pixels and each pixel includes a driving transistor having a gate connected to a first node, a source connected to a third node, and a drain connected to a fourth node, the driving transistor generating pixel current corresponding to a data voltage when a high-level source voltage is applied to the third node, an internal compensator comprising a first capacitor connected between the first node and a second node, and a second capacitor connected between the second node and an input terminal for the high-level source voltage, the internal compensator controlling a threshold voltage of the driving transistor with reference to a first scan signal, a second scan signal opposite to the first scan signal in phase, a third scan signal lagging the first scan signal in phase, a fourth scan signal leading the first scan signal in phase, and an emission signal, and a light emitting element connected between a fifth node to be connected to the fourth node and an input terminal for a low-level source voltage.