公开(公告)号：US10573223B2

公开(公告)日：2020-02-25

申请号：US15406948

申请日：2017-01-16

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Ji-Hye Kong ,  Ji-Su Na ,  Yong-Sung Park ,  Dong-Bum Lee ,  In-Ho Choi ,  Young-In Hwang ,  Min-Woo Byun ,  Hea-Min Jung

IPC: G09G3/20 ,  G09G3/3266 ,  H01L27/12

Abstract: A scan driver includes scan signal outputting circuits, at least one of the scan signal outputting circuits includes a driving circuit and a buffer circuit. The driving circuit includes driving transistors. The driving circuit provides first and second driving signals to first and second driving nodes, respectively by turning on or off the driving transistors in response to clock signals and a scan input signal. The buffer circuit includes buffer transistors. The buffer circuit outputs a scan signal at an output node by turning on or off the buffer transistors in response to the first and second driving signals. The at least one of the scan signal outputting circuits performs a back-biasing voltage applying operation on at least one of the driving transistors and the buffer transistors when the driving transistors and the buffer transistors are turned on or off.

公开(公告)号：US09646542B2

公开(公告)日：2017-05-09

申请号：US14682579

申请日：2015-04-09

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Min-Woo Byun

IPC: G06F3/038 ,  G09G3/3266 ,  G09G3/3233

CPC classification number: G09G3/3266 ,  G09G3/3233 ,  G09G2320/0223 ,  G09G2330/02

Abstract: A gate driver circuit includes a gate driver coupled to a gate line. The gate driver generates a gate signal for input to a plurality of pixels and controls a current of the gate signal based on an IR-drop of a supply voltage supplied to the pixels through a supply voltage distribution line. The gate driver decreases the current of the gate signal when the IR-drop increases, and increases the current of the first gate signal when the IR-drop decreases. A pulse width of an activation period of the gate signal decreases and luminance of the pixels increases when the current of the first row pixels decreases.