Method of driving display panel to reduce fuzz at image boundary and display apparatus for performing the same

Patent metadata

Field	Value
Publication number	US-10074300-B2
Application number	US-201614994547-A
Country	US
Kind code	B2
Filing date	Jan 13, 2016
Priority date	Jul 27, 2015
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A display panel includes a plurality of pixels arranged in a matrix, each of the pixels including a high sub-pixel and a low sub-pixel. A method of driving the display panel may include detecting a first pixel which corresponds to a first pattern in an image, and changing a gray scale value of the high or low sub-pixel of a second pixel which is adjacent to the first pixel.

First claim

What is claimed is:

1. A method of driving a display panel, the display panel comprising a plurality of pixels arranged in a matrix, each of the pixels comprising a high sub-pixel and a low sub-pixel, the method comprising:
detecting a first pixel which corresponds to a first pattern in an image, wherein the first pixel corresponds to the first pattern when a gray scale value of the high or low sub-pixel of the first pixel is within a predetermined range;
detecting a second pixel that does not correspond to the first pattern, wherein the second pixel does not correspond to the first pattern when a gray scale value of the high or low sub-pixel of the second pixel is outside the predetermined range; and
changing the gray scale value of the high or low sub-pixel of the second pixel which is adjacent to the first pixel to correspond to a color of a gray scale value of the high or low sub-pixel of the second pixel which is not adjacent to the first pixel.

2. The method of claim 1 , wherein the high sub-pixels of the second pixel are driven by a first gamma curve, and the low sub-pixels of the second pixel are driven by a second gamma curve which is different from the first gamma curve.

3. The method of claim 2 , wherein when the gray scale value of the high or low sub-pixel of the second pixel which is adjacent to the first pixel is changed, the gray scale value of the high or low sub-pixel of the second pixel which is not adjacent to the first pixel is not changed.

4. The method of claim 3 , wherein the second pixel is adjacent to the first pixel in a direction in which a data line is extended, and the gray scale value of the high or low sub-pixel of the second pixel which is closer to the first pixel is changed.

5. The method of claim 4 , wherein the gray scale value of the high or low sub-pixel of the second pixel is changed when an image produced at the high or low sub-pixel of the second pixel is darker than an image intended to be produced at the high or low sub-pixel of the second pixel.

6. The method of claim 4 , wherein the gray scale value of the high or low sub-pixel of the second pixel is changed when an image produced at the high or low sub-pixel of the second pixel is brighter than an image intended to be produced at the high or low sub-pixel of the second pixel.

7. The method of claim 1 , wherein the first pixel is detected by deciding whether a difference between gray scale values of continuous pixels is greater than 50% of the predetermined range or not.

8. The method of claim 1 , wherein the first pattern is text.

9. The method of claim 1 , wherein the high sub-pixel and the low sub-pixel of the first pixel or the high-sub pixel and the low sub-pixel of the second pixel are electrically connected to different switching elements.

10. The method of claim 9 , wherein the high sub-pixel and the low sub-pixel in one of the first or second pixels are overlapped with a color filter which has one color.

11. The method of claim 10 , wherein the high sub-pixel and the low sub-pixel in the one pixel are arranged along a direction in which a data line is extended.

12. The method of claim 11 , wherein a light blocking pattern divides the one pixel into two portions.

13. The method of claim 10 , wherein the display panel further comprises a liquid crystal layer, and the display panel is driven by a vertical alignment mode.

14. The method of claim 10 , wherein the display panel is a curved display panel which displays an image on a curved surface.

15. The method of claim 10 , wherein the high sub-pixel and the low sub-pixel in the one pixel are arranged along a direction in which a gate line is extended.

16. A method of driving a display panel, which comprises a plurality of pixels arranged in a matrix form, each pixel having a high sub-pixel and a low sub-pixel, the method comprising:
detecting a first pixel which corresponds to text, wherein the first pixel corresponds to the text when a gray scale value of the high or low sub-pixel of the first pixel is within a predetermined range;
detecting a second pixel that does not correspond to the text, wherein the second pixel does not correspond to the text when a gray scale value of the high or low sub-pixel of the second pixel is outside the predetermined range; and
correcting the gray scale value of the high or low sub-pixel of the second pixel, which is adjacent to the first pixel, to have a brighter value or a darker value that corresponds to a color of a gray scale value of the high or low sub-pixel of the second pixel which is not adjacent to the first pixel.

Assignees

• Samsung Display Co Ltd

Inventors

• Yeon Yeun-Mo
• Ko Seung-Hyun
• Kwak Choong-Yull
• Kwon Dal-Jung
• Kim Jin-Tae
• Oh Se-Young

Classifications

• G09G3/2074 Primary

  using sub-pixels · CPC title

• G09G2320/0613

  The adjustment depending on the type of the information to be displayed · CPC title

• G09G2320/0673

  for control of gamma adjustment, e.g. selecting another gamma curve · CPC title

• G09G3/3607

  for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127) · CPC title