Display device

Patent metadata

Field	Value
Publication number	US-12494175-B2
Application number	US-202418607732-A
Country	US
Kind code	B2
Filing date	Mar 18, 2024
Priority date	Aug 2, 2023
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

A display device includes a display panel including pixels connected to scan lines, a scan driving circuit including scan stages corresponding to the scan lines, respectively, where each of the scan stages receives a masking signal and a carry signal and outputs a scan signal, and a driving controller which divides the display panel into the first display area and the second display area, controls the scan driving circuit such that the first display area and the second display area operate with different frequencies, and outputs start signals provided at different timings. A first scan stage disposed in the first display area from among the scan stages receives a first start signal of the start signals as the carry signal, and a first scan stage disposed in the second display area from among the scan stages receives a second start signal of the start signals as the carry signal.

First claim

What is claimed is:

1 . A display device comprising:
a display panel including a plurality of pixels connected to a plurality of scan lines, wherein a display area including a first display area and a second display area is defined in the display panel; a scan driving circuit including a plurality of scan stages corresponding to the plurality of scan lines, respectively, wherein each of the plurality of scan stages receives a corresponding one of a plurality of masking signals and a carry signal and outputs a scan signal; and a driving controller which controls the scan driving circuit and outputs a plurality of start signals including a first start signal and a second start signal, wherein the plurality of pixels includes a plurality of first pixels disposed in the first display area and a plurality of second pixels disposed in the second display area, wherein the plurality of scan stages include a plurality of first scan stages connected to the plurality of first pixels and a plurality of second scan stages connected to the plurality of second pixels, wherein each of the plurality of first scan stages receives a first masking signal from among the plurality of masking signals, and each of the plurality of second scan stages receives a second masking signal from among the plurality of masking signals, wherein a first first scan stage among the plurality of first scan stages receives the first start signal as the carry signal from the driving controller, and wherein a first second scan stage among the plurality of second scan stages receives the second start signal as the carry signal from the driving controller.

2 . The display device of claim 1 , wherein, when the scan signal is output from a last scan stage among the plurality of first scan stages, the second start signal is output to the first second scan stage.

3 . The display device of claim 1 , wherein a first second display area and a second second display area adjacent to the first second display area are defined in the second display area, and
wherein, during a multi-frequency mode, the driving controller controls the first second display area and the second second display area by using the second masking signal to operate the first second display area and the second second display area with different driving frequencies.

4 . The display device of claim 3 , wherein a first driving frequency of the first display area is lower than a first second driving frequency of the first second display area, and
wherein a second second driving frequency of the second second display area is lower than the first second driving frequency of the first second display area.

5 . The display device of claim 3 , wherein, during the multi-frequency mode, at least one of the plurality of second scan stages masks the scan signal provided to a plurality of second pixels disposed in the second second display area from among the plurality of second pixels based on the second masking signal.

6 . The display device of claim 1 , wherein a number of the plurality of start signals is half a maximum number of areas operatable with different driving frequencies from each other in the display area.

7 . The display device of claim 1 , wherein, when the first masking signal provided to the first first scan stage is enabled, the driving controller disables the first start signal.

8 . The display device of claim 7 , wherein, when the second masking signal provided to the first second scan stage is enabled, the driving controller disables the second start signal.

9 . The display device of claim 1 , wherein, when the corresponding one of the plurality of masking signals provided to a scan stage among the plurality of scan stages is enabled, the scan stage masks the scan signal thereof.

10 . The display device of claim 1 , wherein each of the remaining first scan stages among the plurality of first scan stages other than the first first scan stage receives the scan signal of a previous first scan stage as the carry signal, and
wherein each of the remaining second scan stages among the plurality of second scan stages other than the first second scan stage receives the scan signal of a previous second scan stage as the carry signal.

11 . The display device of claim 1 , wherein the display area further includes a third display area spaced from the first display area, with the second display area interposed therebetween,
wherein the plurality of start signals further include a third start signal, wherein the plurality of pixels further include a plurality of third pixels disposed in the third display area, wherein the plurality of scan stages further include a plurality of third scan stages connected to the plurality of third pixels, wherein each of the plurality of third scan stages receives a third masking signal from among the plurality of masking signals, and wherein a first third scan stage among the plurality of third scan stages receives the third start signal as the carry signal from the driving controller.

12 . The display device of claim 11 , wherein a first third display area and a second third display area adjacent to the first third display area are defined in the third display area, and
wherein, during a multi-frequency mode, the driving controller controls the first third display area and the second third display area by using the third masking signal to operate the first third display area and the second third display area with different driving frequencies.

13 . The display device of claim 12 , wherein, during the multi-frequency mode, the first display area, the second display area, and the first third display area operate with a same driving frequency.

14 . The display device of claim 12 , wherein, during the multi-frequency mode, each of the first display area and the second third display area operates with a first driving frequency,
wherein a second driving frequency of the second display area is higher than the first driving frequency of the first display area, and wherein a third driving frequency of the first third display area is lower than the second driving frequency of the second display area.

15 . A display device comprising:
a display panel including a plurality of pixels connected to a plurality of scan lines, wherein a display area including a first display area and a second display area is defined in the display panel; a scan driving circuit including a plurality of scan stages corresponding to the plurality of scan lines, respectively, wherein each of the plurality of scan stages receives a corresponding one of a plurality of masking signals and a carry signal and outputs a scan signal; and a driving controller, wherein, in a multi-frequency mode, the driving controller divides the display panel into the first display area and the second display area, controls the scan driving circuit such that the first display area and the second display area operate with different frequencies from each other, and outputs a plurality of start signals including a first start signal and a second start signal, wherein the first start signal and the second start signal are provided at different timings from each other, wherein each stage disposed in the first display area from among the plurality of scan stages receives a first masking signal from among the plurality of masking signals, wherein each stages disposed in the second display area from among the plurality of scan stages receives a second masking signal from among the plurality of masking signals, wherein a first scan stage disposed in the first display area from among t

Assignees

• Samsung Display Co Ltd

Inventors

• Kwon Sangan
• Kim Soon-Dong
• Kim Jihye
• Kim Taehoon
• Yoon Changnoh

Classifications

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2380/02

  Flexible displays · CPC title

• G09G2340/0435

  Change or adaptation of the frame rate of the video stream · CPC title

• G09G3/035

  for flexible display surfaces · CPC title