公开(公告)号：US20220277683A1

公开(公告)日：2022-09-01

申请号：US17511859

申请日：2021-10-27

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Byeong Doo KANG ,  Jong Man Kim ,  Jae Woo Ryu ,  Yoon Sup Kim ,  Yoon Ju Kim

IPC: G09G3/20

Abstract: A driving method of a display device including a power source which supplies a power voltage to a power base line, and pixels connected to power branch lines commonly connected to the power base line, includes calculating a first scale factor based on input grayscales received during a first frame period; calculating first output grayscales by applying the first scale factor to first input grayscales received during a second frame period, where the second frame period is a frame period immediately next to the first frame period; displaying an image by at least a part of the pixels based on the first output grayscales; and providing a first current limiting signal to the power source and calculating a second scale factor smaller than the first scale factor when a current of the power base line exceeds a reference value.

公开(公告)号：US11488534B2

公开(公告)日：2022-11-01

申请号：US17475627

申请日：2021-09-15

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Byeong Doo Kang ,  Jung Taek Kim ,  Sung Mo Yang ,  Dong Ki Eun ,  Yoon Sup Kim ,  Yoon Ju Kim

IPC: G09G3/3233

Abstract: A display device includes: a low drop-out (“LDO”) regulator which provides a second power voltage to a power line during a first period of one frame; a buck converter which provides a first power voltage to the power line during a third period of the one frame; and a pixel connected to the LDO regulator and the buck converter through the power line. A voltage level of the second power voltage is equal to a voltage level of the first power voltage.

公开(公告)号：US11594167B2

公开(公告)日：2023-02-28

申请号：US17511859

申请日：2021-10-27

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Byeong Doo Kang ,  Jong Man Kim ,  Jae Woo Ryu ,  Yoon Sup Kim ,  Yoon Ju Kim

IPC: G09G3/20

Abstract: A driving method of a display device including a power source which supplies a power voltage to a power base line, and pixels connected to power branch lines commonly connected to the power base line, includes calculating a first scale factor based on input grayscales received during a first frame period; calculating first output grayscales by applying the first scale factor to first input grayscales received during a second frame period, where the second frame period is a frame period immediately next to the first frame period; displaying an image by at least a part of the pixels based on the first output grayscales; and providing a first current limiting signal to the power source and calculating a second scale factor smaller than the first scale factor when a current of the power base line exceeds a reference value.

公开(公告)号：US20220284855A1

公开(公告)日：2022-09-08

申请号：US17475627

申请日：2021-09-15

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Byeong Doo KANG ,  Jung Taek Kim ,  Sung Mo Yang ,  Dong Ki Eun ,  Yoon Sup Kim ,  Yoon Ju Kim

IPC: G09G3/3233

Abstract: A display device includes: a low drop-out (“LDO”) regulator which provides a second power voltage to a power line during a first period of one frame; a buck converter which provides a first power voltage to the power line during a third period of the one frame; and a pixel connected to the LDO regulator and the buck converter through the power line. A voltage level of the second power voltage is equal to a voltage level of the first power voltage.