公开(公告)号：US20200090596A1

公开(公告)日：2020-03-19

申请号：US16575202

申请日：2019-09-18

Applicant: Samsung Display Co., Ltd.

Inventor： Kwan-Young OH ,  Suk Jin PARK ,  Youngsoo SOHN ,  Wonhee LEE ,  Jae Hyoung PARK

IPC: G09G3/34 ,  G09G3/36

Abstract: A liquid crystal display device comprising, a liquid crystal display panel, a timing controller configured to output a light-source controlling signal during a variable frequency mode comprising a plurality of frames with variable frame frequencies, the light-source controlling signal having a high level during a light-on period preset in an early period of a frame of the plurality of frames and a low level during a light-off period preset to a length according to a frame frequency in a latter period of the frame of the plurality of frames, and a light source configured to emit light during the light-on period and not emit light during the light-off period in response to the light-source controlling signal.

公开(公告)号：US20190244579A1

公开(公告)日：2019-08-08

申请号：US16256349

申请日：2019-01-24

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kwan-Young OH ,  Yoongu KIM ,  Sukjin PARK ,  Wonhee LEE ,  Sangsu HAN ,  Jae-Han LEE

IPC: G09G3/36 ,  G09G3/20

CPC classification number: G09G3/3688 ,  G09G3/2022 ,  G09G3/3696

Abstract: A method of operating a display device involves detecting whether a frame mode of the display device is a normal mode in which image data are received with a constant frame rate or a variable frame mode in which the image data are received with a variable frame rate. An output buffer drivability of a data driver included in the display device may be set according to the detected frame mode, and an image is displayed by outputting data voltages corresponding to the image data with slew rates corresponding to the set output buffer drivability. Power consumption in output buffer amplifiers may be selectively lowered by setting a relatively low output buffer drivability corresponding to a relatively low slew rate.