Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12548498-B2
Application number	US-202418780074-A
Country	US
Kind code	B2
Filing date	Jul 22, 2024
Priority date	Sep 26, 2023
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A method of manufacturing including: generating first compensation data based on pre-stored first mura data; displaying a test image according to the first compensation data; generating second mura data based on the displayed test image; generating second compensation data based on the second mura data; generating integrated compensation data based on a combination of the first compensation data and the second compensation data; and compensating for a luminance of the display device based on the integrated compensation data.

First claim

What is claimed is:

1 . A method of compensating for luminance of a display device, comprising:
generating first compensation data based on pre-stored first mura data; displaying a test image according to the first compensation data, wherein a luminance of the test image is compensated based on the first compensation data; generating second mura data based on the displayed test image; generating second compensation data based on the second mura data; generating integrated compensation data based on a combination of the first compensation data and the second compensation data; and compensating for luminance of the display device based on the integrated compensation data.

2 . The method of claim 1 , wherein the first mura data includes data of a cell mura based on a manufacturing process of the display device.

3 . The method of claim 1 , wherein the second mura data includes data of a backlight unit mura based on an operating process of the display device.

4 . The method of claim 1 , wherein the first compensation data includes luminance correction data for at least one gray level of at least one unit pixel group included in the display device, and be used for 4-plane compensation for a first gray level, a second gray level, a third gray level, and a fourth gray level of the at least one unit pixel group.

5 . A method of compensating for luminance of a display device, comprising:
generating first compensation data based on pre-stored first mura data; displaying a test image according to the first compensation data; generating second mura data based on the displayed test image; generating second compensation data based on the second mura data; generating integrated compensation data based on a combination of the first compensation data and the second compensation data; and compensating for luminance of the display device based on the integrated compensation data, wherein the second compensation data includes luminance correction data for at least one gray level of at least one unit pixel group included in the display device, and be used for 5-plane compensation for a first gray level, a second gray level, a third gray level, a fourth gray level, and a fifth gray level of the at least one unit pixel group.

6 . The method of claim 1 , wherein the first compensation data and the second compensation data include at least one of an LUT map including a compensation value corresponding to mura data, magnitude data including a luminance compensation amount for at least one unit pixel group, and offset data for adjusting the luminance compensation amount.

7 . The method of claim 6 , wherein the generating the integrated compensation data comprises:
extracting the LUT map, the magnitude data, and the offset data by decoding the first compensation data and the second compensation data; combining the LUT map of the first compensation data and the LUT map of the second compensation data, based on a summation algorithm; combining the magnitude data of the first compensation data and the magnitude data of the second compensation data, based on the summation algorithm; and combining the offset data of the first compensation data and the offset data of the second compensation data, based on the summation algorithm.

8 . The method of claim 7 , wherein the generating the integrated compensation data further comprises encoding the at least one of the combined LUT map, the combined magnitude data, and the combined offset data.

9 . The method of claim 1 , wherein compensating for the luminance of the display device comprises:
receiving the integrated compensation data including at least one of an LUT map, magnitude data, and offset data; controlling a luminance of the image corresponding to input data based on the offset data; and controlling a gradation of the image corresponding to the input data based on at least one of the LUT map and the magnitude data.

10 . The method of claim 1 , further comprising:
displaying the test image according to the integrated compensation data; generating complementary luminance data based on the displayed test image; generating third mura data based on the complementary luminance data; generating third compensation data based on the third mura data; generating complementary integrated compensation data based on a combination of the first compensation data, the second compensation data, and the third compensation data; and additionally compensating for the luminance of the display device based on the complementary integrated compensation data.

11 . A display device, comprising:
a display panel configured to display an image; a timing controller configured to control a data signal and a gate signal; and a luminance compensator configured to compensate for luminance of the image displayed on the display panel, wherein the luminance compensator is configured to generate first compensation data based on pre-stored first mura data, wherein the display panel is configured to display a test image according to the first compensation data, wherein a luminance of the test image is compensated based on the first compensation data, and wherein the luminance compensator is configured to:
generate second mura data based on luminance data comprising a luminance distribution of the displayed test image,
generate second compensation data based on the second mura data,
generate integrated compensation data based on a combination of the first compensation data and the second compensation data, and
compensate for the luminance of the image displayed on the display panel based on the integrated compensation data.

12 . The display device of claim 11 , wherein the first mura data comprises data of a cell mura based on a manufacturing process of the display device.

13 . The display device of claim 11 , wherein the second mura data comprises data of a backlight unit mura based on an operating process of the display device.

14 . The display device of claim 11 , wherein the first compensation data and the second compensation data comprise luminance correction data for at least one gray level of at least one unit pixel group included in the display device.

15 . The display device of claim 14 , wherein the luminance compensator is further configured to:
generate the first compensation data to be used for 4-plane compensation for a first gray level, a second gray level, a third gray level, and a fourth gray level of the at least one unit pixel group; and generate the second compensation data to be used for 5-plane compensation for the first gray level, the second gray level, the third gray level, the fourth gray level, and a fifth gray level of the at least one unit pixel group.

16 . The display device of claim 11 , wherein the first compensation data and the second compensation data comprise at least one of an LUT map corresponding to mura data, magnitude data comprising a luminance compensation amount for at least one unit pixel group, and offset data for adjusting the luminance compensation amount.

17 . The display device of claim 16 , wherein the luminance compensator is further configured to:
extract the LUT map, the magnitude data, and the offset data, by decoding the first compensation data and the second compensation data; combine the LUT map of the first compensation data and the LUT map of the second compensation data based on a summation algorithm, combine the magnitude data of the first compensation data and the magnitude data of the second compensation data based on the summation algorithm, and

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lim Sungjin
• Jeong Seungjun
• Kang Hyun
• Ko Woosuk
• Kim Myeonggu
• Park Namwoo
• Park Yongcheol
• Chun Wanhee

Classifications

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2310/08

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

• G09G3/006

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title