公开(公告)号：US20210049958A1

公开(公告)日：2021-02-18

申请号：US16852848

申请日：2020-04-20

Applicant: Samsung Display Co., Ltd.

Inventor： Keun Woo KIM ,  Mee Jae KANG ,  Hye Na KWAK ,  Han Bit KIM ,  Thanh Tien NGUYEN ,  Yong Su LEE ,  Jae Seob LEE

IPC: G09G3/325 ,  G09G3/3283 ,  G09G3/3266

Abstract: A display device includes: a pixel including: a light emitting element connected between a first power source and a second power source; a first transistor connected between the first power source and the light emitting element to control a driving current, and including a first gate electrode connected to a first node and a second gate electrode connected to a bias control line; and a switching transistor connected between a data line and the first node, and including a gate electrode connected to a scan line; and a driving circuit to drive the pixel according to a driving frequency. The driving circuit drives the pixel in a first mode when the driving frequency is in a first range, and sequentially supplies a control signal having a first voltage and a second voltage to the bias control line during a light emission period of the pixel in the first mode.

公开(公告)号：US20210036079A1

公开(公告)日：2021-02-04

申请号：US16838931

申请日：2020-04-02

Applicant: Samsung Display Co., Ltd.

Inventor： Keun Woo KIM ,  Yong Su LEE ,  Myoung Geun CHA ,  Doo Na KIM ,  Sang Sub KIM ,  Jae Hwan CHU ,  Sang Gun CHOI

IPC: H01L27/32

Abstract: A display device includes: a pixel at a display region. The pixel includes: a light-emitting element connected between a first power source and a second power source; and a first transistor connected between the first power source and the light-emitting element, the first transistor to control a driving current of the light-emitting element in response to a voltage of a first node. The first transistor includes a first driving transistor and a second driving transistor that are connected in series with each other between the first power source and the light-emitting element, and the first driving transistor and the second driving transistor have structures that are asymmetric with each other in a cross-sectional view.