Device for controlling luminance, method thereof, and display device

Patent metadata

Field	Value
Publication number	US-10977981-B2
Application number	US-201916388425-A
Country	US
Kind code	B2
Filing date	Apr 18, 2019
Priority date	Sep 12, 2018
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

Embodiments of the present disclosure provide a device for controlling luminance, a method of controlling luminance and a display device. The method of controlling luminance may comprise: obtaining a theoretical white balanced luminance value for each color of sub-pixel included in N pixels; obtaining a luminance controlling value for other colors of sub-pixels except for a ith color of sub-pixel included in each of the N pixels; and adjusting luminance of the other colors of sub-pixels except for the ith color of sub-pixel included in each pixel according to the luminance controlling value. The method of controlling luminance can be used in luminance controlling devices.

First claim

We claim:

1. A device for controlling luminance, comprising:
a memory configured to store instructions; and
at least one processor configured to execute the instructions stored in the memory to:
obtain a theoretical white balanced luminance value for each color of sub-pixel included in N pixels, wherein the N pixels are adjacent, and N is an integer greater than or equal to 1;
set a luminance controlling value for other colors of sub-pixels except for an i th color of sub-pixel included in each of the N pixels, according to the theoretical white balanced luminance value for each color of sub-pixel and a sum of the luminance loss values for the i th color of sub-pixels included in the N pixels, in response to the i th color of sub-pixel included in a t th pixel of the N pixels having a luminance loss, wherein t is an integer greater than or equal to 1 and less than or equal to N, and i is an integer greater than or equal to 1; and
adjust luminance of the other colors of sub-pixels except for the i th color of sub-pixels included in the N pixels according to the luminance controlling value, so that a ratio among a sum of the luminance values of the i th color of sub-pixels included in the N pixels and a sum of the adjusted luminance values of the other colors of sub-pixels except for the i th color of sub-pixels included in the N pixels is coincident with a white balanced luminance value ratio.

2. The device of claim 1 , wherein the processor is further configured to set the luminance controlling value for the other colors of sub-pixels, so as to satisfy at least one of:
a ratio between the luminance controlling value and the theoretical white balanced luminance value for each of the other colors of sub-pixels except for the i th color of sub-pixel included in each pixel being equal to a ratio between the sum of the luminance loss values and a sum of the theoretical white balanced luminance values for the i th color of sub-pixels included in the N pixels, and
a ratio between a sum of the luminance controlling values and the sum of theoretical white balanced luminance value for each of the other colors of sub-pixels except for the i th color of sub-pixel included in the N adjacent pixel being equal to a ratio between the sum of the luminance loss values and the sum of the theoretical white balanced luminance values for the i th color of sub-pixels included in the N pixels.

3. The device of claim 1 , wherein the processor is further configured to adjust the luminance of the other colors of sub-pixels, so as to satisfy at least one of:
a ratio among the adjusted luminance values of the other colors of sub-pixels except for the i th color of sub-pixel included in each pixel being equal to the theoretical white balanced luminance value ratio of the other colors of sub-pixels; or
a ratio among the adjusted luminance values of the same color of sub-pixels except for the i th color of sub-pixels included in the N pixels being equal to the theoretical white balanced luminance value ratio of the same color of sub-pixels.

4. The device of claim 3 , wherein the processor is further configured to obtain the sum of the theoretical white balanced luminance values for the i th color of sub-pixels included in the N pixels, according to the theoretical white balanced luminance values for the i th color of sub-pixel included in each of the N pixels; obtain a luminance reduction rate η js for the other colors of sub-pixels except for the i th color of sub-pixel included in each pixel, according to the sum of the theoretical white balanced luminance values and the sum of the luminance loss values for the i th color of sub-pixels included in the N pixels; and obtain the luminance controlling value for the other colors of sub-pixels except for the i th color of sub-pixel included in each pixel, according to the luminance reduction rate η js and the theoretical whites balanced luminance value for the other colors of sub-pixels except for the i th color of sub-pixel included in each pixel.

5. The device of claim 4 , wherein the luminance reduction rate for the other colors of sub-pixels except for the i th color of sub-pixel included in each pixel is as follows:

η
js

=

x
a

⁢

L
ti

∑

j
=
1

N

⁢

⁢

L
ji

,

wherein j is the index number of the pixel which is greater than or equal to 1 and less than or equal to N, and s is an index number of other colors of sub-pixels except for the i th color of sub-pixel included in each pixel, and is an integer greater than 0 and not equal to i.

6. The device of claim 1 , wherein the i th color of sub-pixel has an invalid display region; and the processor is further configured to:
obtain an invalid display pixel occupancy

x
a

for the i th color of sub-pixel included in the t th pixel, according to an area of the invalid display region x and the area of a theoretical display region a for the i th color of sub-pixel included in the t th pixel; obtain the luminance loss value ΔL ti for the i th color of sub-pixel included in the t th pixel, according to the invalid display pixel occupancy

x
a

and the theoretical white balanced luminance value L ti for the i th color of sub-pixel, wherein

Δ
⁢

⁢

L
ti

=

x
a

⁢

L
ti

;

and obtain the sum of the luminance loss values ΔL i for the i th color of sub-pixels included in the N pixels, according to the luminance loss value ΔL ti for the i th color of sub-pixel included in the t th pixel.

7. The device of claim 6 , wherein
the luminance controlling value for other colors of sub-pixels except for the i th color of sub-pixel included in each pixel are set to

Δ
⁢

⁢

L
js

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Lv Hongliang
• Ai Qingnan
• Wang Boning
• Yang Ruifeng
• Fan Litao
• Liu Yufei
• Yang Huaxu
• Cui Libao

Classifications

• G09G2320/0233

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