公开(公告)号：US11961468B2

公开(公告)日：2024-04-16

申请号：US17183061

申请日：2021-02-23

Applicant: Samsung Display Co., Ltd.

Inventor： Gaurav Malhotra ,  Anup Jose ,  Amir Amirkhany

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2320/029 ,  G09G2320/045

Abstract: A method for compensating for transistor aging in a display device is presented. The method entails dividing pixels into a plurality of groups including a first group, the first group including Z pixels wherein Z>1, sampling a pixel current for each pixel in a subset of pixels in the first group, the subset including M pixels wherein 1≤M≤Z, determining an ErrorM using the sampled pixel current for the M pixels and a predefined reference current, and adjusting an input voltage for a transistor in more than one of the Z pixels based on the ErrorM. The adjusting of the input voltage may include generating a modified voltage Vd, wherein

Vd=A*Vin+B,

and each of A and B is determined using ΣM sign(Errorm).

公开(公告)号：US20220093041A1

公开(公告)日：2022-03-24

申请号：US17183061

申请日：2021-02-23

Applicant: Samsung Display Co., Ltd.

Inventor： Gaurav Malhotra ,  Anup Jose ,  Amir Amirkhany

IPC: G09G3/3233 ,  G09G3/00 ,  G09G3/36

Abstract: A method for compensating for transistor aging in a display device is presented. The method entails dividing pixels into a plurality of groups including a first group, the first group including Z pixels wherein Z>1, sampling a pixel current for each pixel in a subset of pixels in the first group, the subset including M pixels wherein 1≤M≤Z, determining an ErrorM using the sampled pixel current for the M pixels and a predefined reference current, and adjusting an input voltage for a transistor in more than one of the Z pixels based on the ErrorM. The adjusting of the input voltage may include generating a modified voltage Vd, wherein Vd=A*Vin+B, and each of A and B is determined using ΣM sign(Errorm).