公开(公告)号：US20230144298A1

公开(公告)日：2023-05-11

申请号：US17974283

申请日：2022-10-26

Applicant: LG DISPLAY CO., LTD.

Inventor： Hogeun KOO ,  Hong Soon KIM ,  Chan PARK

IPC: G09G3/3291

CPC classification number: G09G3/3291 ,  G09G2310/0297 ,  G09G2310/061 ,  G09G2320/0233

Abstract: Embodiments of the disclosure relate to a display device and a data driving circuit. The display device comprises a display panel including a plurality of subpixels and a plurality of data lines electrically connected with the plurality of subpixels and a data driving circuit outputting a data voltage to the plurality of data lines, wherein the data driving circuit outputs the data voltage for image display to the plurality of data lines during an active period and outputs a step voltage to stepwise decrease a level of the data voltage to a preset target voltage level or stepwise increase the level of the data voltage from the target voltage level during a blank period different from the active period. Specifically, there may be provided a display device and a data driving circuit capable of enhancing display quality in a dark mura area and a bright mura area by outputting a step voltage to stepwise decrease the level of a data voltage to a preset target voltage level or stepwise increase the level of the data voltage from the target voltage level during a blank period.

公开(公告)号：US20230143178A1

公开(公告)日：2023-05-11

申请号：US17974320

申请日：2022-10-26

Applicant: LG DISPLAY CO., LTD.

Inventor： Hong Soon KIM ,  Chan PARK ,  Nakyoon KIM

IPC: G09G3/3291 ,  G09G3/3233 ,  G09G3/20

CPC classification number: G09G3/3291 ,  G09G3/2074 ,  G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/0291 ,  G09G2310/0297 ,  G09G2330/021

Abstract: Embodiments of the disclosure relate to a display device and a data driving circuit. Specifically, there may be provided a display device with enhanced power efficiency and a data driving circuit by providing a display device including a display panel divided into an always-on display area displaying information during a standby screen period and a black grayscale area except for the always-on display area, an image display voltage output circuit outputting a data voltage to input to the always-on display area during the standby screen period, and a voltage stabilization circuit outputting a constant voltage to input to at least a partial area of the black grayscale area during the standby screen period.