Display device

Patent metadata

Field	Value
Publication number	US-11749162-B2
Application number	US-202117235141-A
Country	US
Kind code	B2
Filing date	Apr 20, 2021
Priority date	May 6, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A display device includes a display panel including a first pixel and a second pixel disposed adjacent to the first pixel along a first direction, a gate driver configured to provide gate signals to the display panel, a data driver configured to provide data signals to the first and second pixels and a driving controller configured to receive an image data, configured to provide a data signal to the data driver based on the image data, and configured to determine whether a white balance of a current image data corresponding to the second pixel is within a set range. The driving controller calculates the data voltage provided to the second pixel based on the white balance of the current image data corresponding to the second pixel, a previous image data corresponding to the first pixel, and the current image data.

First claim

What is claimed is:

1. A display device comprising:
a display panel including a plurality of pixels arranged in a plurality of columns extending along a first direction and a plurality of rows extending along a second direction crossing the first direction, the plurality of pixels including a first pixel disposed in a first column and a first row, and a second pixel disposed in the first column and a second row;
a gate driver connected to gate lines extending in the second direction and configured to provide gate signals to the display panel through the gate lines;
a data driver connected to data lines extending in the first direction, the data driver being and configured to provide data signals to the first pixel and the second pixels pixel through a corresponding data line; and
a driving controller configured to receive an image data, configured to provide a data signal to the data driver based on the image data, and configured to determine whether a white balance of a current row image data corresponding to the second pixel is within a set range by comparing the current row image data corresponding to the second pixel and an image data corresponding to the second pixel stored in a gamma lookup table,
wherein the driving controller calculates the data voltage provided to the second pixel based on the white balance of the current row image data corresponding to the second pixel, a previous row image data corresponding to the first pixel, and the current row image data corresponding to the second pixel.

2. The display device of claim 1 , wherein the driving controller includes:
an image data analyzer configured to determine whether the white balance of the image data input to the driving controller is within the set range and configured to select one of a source emphasis enable signal and a source emphasis disable signal and configured to output the selected signal; and
an image data converter configured to output the data signal based on the image data and the selected signal.

3. The display device of claim 2 , wherein the image data analyzer provides the source emphasis disable signal when the image data analyzer determines that the white balance of the image data is within the set range.

4. The display device of claim 2 , wherein the image data analyzer compares the previous row image data corresponding to the first pixel and the current row image data corresponding to the second pixel when the image data analyzer determines that the white balance of the current row image data is not within the set range.

5. The display device of claim 4 , wherein the image data analyzer provides the source emphasis enable signal to the image data converter when the current row image data is larger than the previous row image data.

6. The display device of claim 4 , wherein the image data analyzer provides the source emphasis disable signal to the image data converter when the current row image data is less than or equal to the previous row image data.

7. The display device of claim 2 ,
wherein the first pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel,
wherein the second pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel, and
wherein the image data analyzer provides the source emphasis disable signal to the image data converter when all of the first red sub-pixel, the second red sub-pixel, the first green sub-pixel, the second green sub-pixel, the first blue sub-pixel, and the second blue sub-pixel are turned on.

8. The display device of claim 2 ,
wherein the first pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel,
wherein the second pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel, and
wherein the image data analyzer compares the previous row image data corresponding to the first pixel and the current row image data corresponding to the second pixel when the first red sub-pixel and the second red sub-pixel are turned on, and the first green sub-pixel, the first blue sub-pixel, the second green sub-pixel, and the second blue sub-pixel are turned off.

9. The display device of claim 8 , wherein the image data analyzer provides the source emphasis enable signal to the image data converter when the current row image data corresponding to the second pixel is larger than the previous row image data corresponding to the first pixel.

10. The display device of claim 8 , wherein the image data analyzer provides the source emphasis disable signal to the image data converter when the current row image data corresponding to the second pixel is less than or equal to the previous row image data corresponding to the second pixel.

11. The display device of claim 2 ,
wherein the first pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel,
wherein the second pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel, and
wherein the image data analyzer compares the previous row image data corresponding to the first pixel and the current row image data corresponding to the second pixel when the first blue sub-pixel and the second blue sub-pixel are turned on, and the first green sub-pixel, the first red sub-pixel, the second green sub-pixel, and the second red sub-pixel are turned off.

12. The display device of claim 11 , wherein the image data analyzer provides the source emphasis enable signal to the image data converter when the current row image data corresponding to the second pixel is larger than the previous row image data corresponding to the first pixel.

13. The display device of claim 11 , wherein the image data analyzer provides the source emphasis disable signal to the image data converter when the current row image data corresponding to the second pixel is less than or equal to the previous row image data corresponding to the first pixel.

14. The display device of claim 2 ,
wherein the first pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel,
wherein the second pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel, and
wherein the image data analyzer compares the previous row image data corresponding to the first pixel and the current row image data corresponding to the second pixel when the first green sub-pixel and the second green sub-pixel are turned on, and the first red sub-pixel, the first blue sub-pixel, the second red sub-pixel, and the second blue sub-pixel are turned off.

15. The display device of claim 14 , wherein the image data analyzer provides the source emphasis enable signal to the image data converter when the current row image data corresponding to the second pixel is larger than the previous row image data corresponding to the first pixel.

16. The display device of claim 14 , wherein the image data analyzer provides the source emphasis disable signal to the image data converter when the current row image data corresponding to the second pixel is less than or equal to the previous row image data corresponding to the first pixel.

17. The display device of claim 2 ,
wherein the first pixel includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel,
wherein the second pixel includes a second red sub-pixel, a second green sub-pixel, and a second blue sub-pixel, and
wherein the image data analyzer compares the previous row image data corresponding to the first pixel and the current row image data corresponding to the second pixe

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Kyunho
• Shin Yong-Jin
• Baik Joonsuk
• Yang Sung-Mo

Classifications

• G09G3/2003 Primary

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G09G2300/0452

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

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G3/3291 Primary

  in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements · CPC title

• G09G3/3611

  Control of matrices with row and column drivers · CPC title