Display device

Patent metadata

Field	Value
Publication number	US-12136375-B2
Application number	US-202217582805-A
Country	US
Kind code	B2
Filing date	Jan 24, 2022
Priority date	Mar 18, 2021
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

A driving controller of a display device controls a scan driving circuit to sequentially drive a first group of scan lines among a plurality of scan lines to an active level during a first low-frequency frame when the operation mode is a low frequency mode and to sequentially drive a second group of scan lines among the plurality of scan lines to the active level during a second low-frequency frame, outputs an image data signal according to a first arrangement order of a plurality of color pixels in a first row during the first low-frequency frame, and outputs the image data signal according to a second arrangement order of the plurality of color pixels in a second row during the second low-frequency frame.

First claim

What is claimed is:

1. A display device comprising:
a display panel including a plurality of pixels respectively connected to at least one of a plurality of data lines and at least one of a plurality of scan lines;
a data driving circuit configured to drive the plurality of data lines;
a scan driving circuit configured to drive the plurality of scan lines; and
a driving controller configured to receive an image signal and a control signal, determine an operation mode based on the image signal, generate an image data signal based on the image signal, and provide the image data signal to the data driving circuit,
wherein the plurality of pixels comprise a plurality of color pixels comprising four color pixels repeatedly arranged in a first direction,
wherein the plurality of color pixels in a first row are repeatedly arranged in a first arrangement order of the four color pixels, the first arrangement order being a first color pixel configured to emit a first color, a second color pixel configured to emit a second color, a third color pixel configured to emit a third color, and the second color pixel,
wherein the plurality of color pixels in a second row adjacent to the first row are repeatedly arranged in a second arrangement order of the four color pixels, the second arrangement order being the third color pixel, the second color pixel, the first color pixel, and the second color pixel, and
wherein the driving controller is further configured to:
control the scan driving circuit based on the operation mode being a low frequency mode to sequentially drive a first group of scan lines among the plurality of scan lines to an active level during a first low-frequency frame, and sequentially drive a second group of scan lines among the plurality of scan lines to the active level during a second low-frequency frame; and
output the image data signal according to the first arrangement order of the plurality of color pixels in the first row during the first low-frequency frame, and output the image data signal according to the second arrangement order of the plurality of color pixels in the second row during the second low-frequency frame,

wherein scan lines of the first group and scan lines of the second group are alternately arranged one by one,
wherein the driving controller comprises:
an image processor configured to receive the image signal and the control signal, and output a mode signal and the image data signal, the mode signal indicating whether the operation mode is the low frequency mode or a normal mode.

2. The display device of claim 1 , wherein the image data signal provided to the four color pixels in the first row during the first low-frequency frame comprises a first color signal corresponding to the first color pixel, a second color signal corresponding to the second color pixel, a third color signal corresponding to a third color pixel, and the second color signal corresponding to the second color pixel.

3. The display device of claim 1 , wherein the image data signal provided to the four pixels in the second row during the second low-frequency frame comprises a third color signal corresponding to the third color pixel, a second color signal corresponding to the second color pixel, a first color signal corresponding to the first color pixel, and the second color signal corresponding to the second color pixel.

4. The display device of claim 1 , wherein the driving controller comprises:
a control signal generation part configured to receive the image signal and the control signal and output a first control signal and a second control signal in response to the mode signal,
wherein the data driving circuit receives the first control signal, and the scan driving circuit receives the second control signal.

5. The display device of claim 4 , wherein the image processor comprises:
a mode determination part configured to output the mode signal and a first image signal based on the image signal;
an image conversion part configured to convert the first image signal into a second image signal; and
an output part configured to convert the second image signal into the image data signal and output the image data signal in response to the mode signal.

6. The display device of claim 5 , wherein the first image signal comprises a first color signal, a second color signal, and a third color signal,
wherein the second image signal corresponding to the first row comprises the first color signal, the second color signal, the third color signal, and the second color signal, and
wherein the second image signal corresponding to the second row comprises the third color signal, the second color signal, the first color signal, and the second color signal.

7. The display device of claim 6 , further comprising a lookup table for storing swap information for the first color signal, the second color signal, and the third color signal in the second image signal,
wherein the output part converts the second image signal into the image data signal based on the swap information in the low frequency mode.

8. The display device of claim 7 , wherein the lookup table stores the swap information for the first color signal, the second color signal, and the third color signal in the second image signal corresponding to a plurality of driving frequencies of the low frequency mode.

9. The display device of claim 1 , wherein the driving controller determines that the operation mode is the low frequency mode based on the image signal being a still image signal.

10. The display device of claim 9 , wherein the driving controller determines that the operation mode is the normal mode based on the image signal being a video image signal.

11. The display device of claim 10 , wherein the driving controller controls the scan driving circuit to sequentially drive the plurality of scan lines to an active level in each frame in the normal mode.

12. The display device of claim 10 , wherein a driving frequency of the low frequency mode is lower than a driving frequency of the normal mode.

13. A display device comprising:
a display panel including a plurality of pixels respectively connected to at least one of a plurality of data lines and at least one of a plurality of scan lines;
a data driving circuit configured to drive the plurality of data lines;
a scan driving circuit configured to drive the plurality of scan lines; and
a driving controller configured to receive an image signal and a control signal, generate an image data signal based on the image signal, and output a mode signal corresponding to the image signal and the image data signal, the mode signal indicating whether an operation mode is a low frequency mode or a normal mode,
wherein the plurality of pixels comprise a plurality of color pixels comprising four color pixels repeatedly arranged in a first direction,
wherein the plurality of color pixels in a first row are repeatedly arranged in a first arrangement order of the four color pixels, the first arrangement order being a first color pixel configured to emit a first color, a second color pixel configured to emit a second color, a third color pixel configured to emit a third color, and the second color pixel,
wherein the plurality of color pixels in a second row adjacent to the first row are repeatedly arranged in a second arrangement order of the four color pixels, the second arrangement order being the third color pixel, the second color pixel, the first color pixel, and the second color pixel,
wherein the driving controller controls the scan driving circuit based on the mode signal indicating the low frequency mode to sequentially drive a first group of sc

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Jiyoun
• Park Sehyuk
• Kim Hongsoo
• Lim Jaekeun

Classifications

• G09G2310/0267

  Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays · CPC title

• G09G2310/0275

  Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title

• G09G5/06

  using colour palettes, e.g. look-up tables · CPC title

• G09G2310/021

  Double addressing, i.e. scanning two or more lines, e.g. lines 2 and 3; 4 and 5, at a time in a first field, followed by scanning two or more lines in another combination, e.g. lines 1 and 2; 3 and 4, in a second field · CPC title