公开(公告)号：US11631374B2

公开(公告)日：2023-04-18

申请号：US17874680

申请日：2022-07-27

Applicant: Samsung Display Co., Ltd. ,  SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

Inventor： Jeonkyoo Kim ,  Soo Yeon Lee ,  Manseung Cho ,  Kyeong Soo Kang ,  Junhee Moon ,  Bonghyun You ,  Jin Kyu Lee

IPC: G09G3/3291 ,  G09G3/3266

Abstract: A display device includes a sensing circuit and a controller which selects a pixel row in a frame period. A vertical blank period of the frame period includes a sensing time in which the sensing circuit performs a sensing operation for the selected pixel row. The sensing circuit measures a first source voltage of a driving transistor of a pixel in the selected pixel row at a first time point of the sensing time, and measures a second source voltage of the driving transistor at a second time point of the sensing time. The controller calculates a threshold voltage parameter and a mobility parameter based on the first and second source voltages, predicts a saturated source voltage of the driving transistor based on the threshold voltage parameter and the mobility parameter, and calculates a threshold voltage of the driving transistor based on the saturated source voltage.