Display device and method of operating display panel for displaying an image of a surrounding peripheral display region based on luminance deviation

Patent metadata

Field	Value
Publication number	US-11568837-B2
Application number	US-202117411000-A
Country	US
Kind code	B2
Filing date	Aug 24, 2021
Priority date	Oct 5, 2020
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A display device includes: a display panel including a surrounding display area, below which at least one panel driving circuit is positioned, and a main display area surrounded by the surrounding display area, the display panel including first pixels having a first pixel density and disposed in the surrounding display area and second pixels having a second pixel density greater than the first pixel density and disposed in the main display area; and a display panel driver to divide an input image to be displayed on the display panel in each frame into a first image to be displayed on the surrounding display area and a second image to be displayed on the main display area, calculate a luminance deviation of the first image, and determine whether to display the first image in the surrounding display area based on the luminance deviation of the first image.

First claim

What is claimed is:

1. A display device comprising:
a display panel comprising a surrounding display area, below which at least one panel driving circuit is positioned, and a main display area surrounded by the surrounding display area, the display panel comprising first pixels having a first pixel density and disposed in the surrounding display area and second pixels having a second pixel density greater than the first pixel density and disposed in the main display area; and
a display panel driver configured to divide an input image to be displayed on the display panel in each frame into a first image to be displayed on the surrounding display area and a second image to be displayed on the main display area, calculate a luminance deviation of the first image, and determine whether to display the first image in the surrounding display area based on the luminance deviation of the first image.

2. The display device of claim 1 , wherein the display panel driver comprises a data corrector for downscaling or cropping the input image by correcting input image data corresponding to the input image based on the luminance deviation of the first image.

3. The display device of claim 2 , wherein the data corrector is configured to correct the input image data such that the first image is not displayed in the surrounding display area and the second image is displayed in the main display area when the luminance deviation of the first image is greater than a reference luminance deviation.

4. The display device of claim 2 , wherein the data corrector is configured to correct the input image data such that the second image is displayed in the main display area and an edge image of the second image is expanded and displayed in the surrounding display area when the luminance deviation of the first image is greater than a reference luminance deviation.

5. The display device of claim 4 , wherein the data corrector is configured to additionally correct the input image data such that a luminance of the surrounding display area is decreased as a distance from the main display area is increased when the edge image of the second image is expanded and displayed in the surrounding display area.

6. The display device of claim 2 , wherein the data corrector is configured to correct the input image data such that the first image is not displayed in the surrounding display area and the first image and the second image are displayed in the main display area when the luminance deviation of the first image is greater than a reference luminance deviation.

7. The display device of claim 2 , wherein the data corrector is configured to correct the input image data such that the first image and the second image are displayed in the main display area and an edge image of the first image is expanded and displayed in the surrounding display area when the luminance deviation of the first image is greater than a reference luminance deviation.

8. The display device of claim 7 , wherein the data corrector is configured to additionally correct the input image data such that a luminance of the surrounding display area is decreased as a distance from the main display area is increased when the edge image of the first image is expanded and displayed in the surrounding display area.

9. The display device of claim 2 , wherein the data corrector is configured to correct the input image data such that the first image is displayed in the surrounding display area, the second image is displayed in the main display area, and a boundary between the surrounding display area and the main display area is prevented from being visually recognized to a user when the luminance deviation of the first image is smaller than a reference luminance deviation.

10. The display device of claim 9 , wherein the data corrector is configured to additionally correct the input image data such that a luminance of the surrounding display area is decreased as a distance from the main display area is increased when the first image is displayed in the surrounding display area.

11. A method of operating a display panel having a main display area and a surrounding display area surrounding the main display area, the method comprising the steps of:
driving the display panel and dividing an input image to be displayed on the display panel in each frame into a first image to be displayed in the surrounding display area and a second image to be displayed in the main display area;
calculating a luminance deviation of the first image; and
determining whether to display the first image in the surrounding display area based on the luminance deviation of the first image, wherein the display panel comprises at least one panel driving circuit disposed under the surrounding display area, first pixels having a first pixel density and disposed in the surrounding display area, and second pixels having a second pixel density greater than the first pixel density and disposed in the main display area.

12. The method of claim 11 , further comprising the step of:
downscaling or cropping the input image by correcting input image data corresponding to the input image based on the luminance deviation of the first image.

13. The method of claim 12 , wherein the step of cropping of the input image comprises the step of correcting the input image data such that the first image is not displayed in the surrounding display area and the second image is displayed in the main display area when the luminance deviation of the first image is greater than a reference luminance deviation.

14. The method of claim 12 , wherein the step of cropping of the input image comprises the step of correcting the input image data such that the second image is displayed in the main display area and an edge image of the second image is expanded and displayed in the surrounding display area when the luminance deviation of the first image is greater than a reference luminance deviation.

15. The method of claim 14 , wherein the step of cropping of the input image further comprises the step of correcting the input image data such that a luminance of the surrounding display area is decreased as a distance from the main display area is increased when the edge image of the second image is expanded and displayed in the surrounding display area.

16. The method of claim 12 , wherein the step of downscaling of the input image comprises the step of correcting the input image data such that the first image is not displayed in the surrounding display area and the first image and the second image are displayed in the main display area when the luminance deviation of the first image is greater than a reference luminance deviation.

17. The method of claim 12 , wherein the step of downscaling of the input image comprises the step of correcting the input image data such that the first image and the second image are displayed in the main display area and an edge image of the first image is expanded and displayed in the surrounding display area when the luminance deviation of the first image is greater than a reference luminance deviation.

18. The method of claim 17 , wherein the step of downscaling of the input image further comprises the step of correcting the input image data such that a luminance of the surrounding display area is decreased as a distance from the main display area is increased when the edge image of the first image is expanded and displayed in the surrounding display area.

19. The method of claim 12 , wherein the step of correcting of the input image data comprises the step of correcting

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Sukhun
• Gu Bon-Seog

Classifications

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G5/373 Primary

  for modifying the size of the graphic pattern · CPC title

• G06T2207/20021

  Dividing image into blocks, subimages or windows · CPC title

• G09G2340/0407

  Resolution change, inclusive of the use of different resolutions for different screen areas · CPC title

• G06T2207/20132

  Image cropping · CPC title