Brightness regulating method, regulating system and displaying device

Patent metadata

Field	Value
Publication number	US-12148398-B2
Application number	US-202117795588-A
Country	US
Kind code	B2
Filing date	Sep 29, 2021
Priority date	Sep 29, 2021
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

The present disclosure provides a brightness regulating method. The brightness regulating method is applied to a displaying device. The displaying device includes a backlight module. The regulating method includes: dividing a backlight source of the backlight module into a plurality of light areas; acquiring pixel quantities and pixel grayscale values of pixels within pixel areas corresponding to each of the light areas; according to the pixel quantities and the pixel grayscale values, determining brightness parameters of the light areas; and according to the brightness parameters, regulating brightnesses of the light area. Because, in the process of the brightness regulation, each of the light areas corresponds to one brightness parameter, the light areas can be individually regulated according to the severity degrees of the halo phenomenon in the different areas, whereby, while alleviating the halo phenomenon, the brightness regulation has a better pertinence and a better effect.

First claim

The invention claimed is:

1. A brightness regulating method, wherein the method is applied to a displaying device, the displaying device comprises a backlight module, and the brightness regulating method comprises:
dividing a backlight source of the backlight module into a plurality of light areas;
acquiring pixel quantities and pixel grayscale values of pixels within pixel areas corresponding to each of the light areas;
according to the pixel quantities and the pixel grayscale values, determining brightness parameters of the light areas; and
according to the brightnesses parameters, regulating brightness of the light areas;
wherein the brightness regulating method is executed by a brightness regulating system, the brightness regulating system comprises: a controller and the backlight module that are electrically connected;
the backlight module is configured for providing the backlight source under controlling by the controller;
the controller comprises an area dividing and light regulating unit and a controlling unit;
the controlling unit and the area dividing and light regulating unit are electrically connected, and the area dividing and light regulating unit and the backlight module are electrically connected;
the area dividing and light regulating unit is configured for, when an area-delimitation controlling signal emitted by the controlling unit has been received, according to the area-delimitation controlling signal, dividing the backlight source into the plurality of light areas;
the controlling unit is configured for acquiring and storing the pixel quantities and the pixel grayscale values of the pixels within the pixel areas corresponding to each of the light areas; according to the pixel quantities and the pixel grayscale values, determining the brightness parameters of the light areas; and emitting the area-delimitation controlling signal and a light regulating signal; and
the area dividing and light regulating unit is further configured for, after the light regulating signal has been received, acquiring the brightness parameters, and according to the brightness parameters, regulating the brightnesses of the light areas;
the system further comprises a display panel, the display panel is located on a light exiting side of the backlight module, and the display panel is electrically connected to the controlling unit;
the controller further comprises a color compensating unit, and the color compensating unit is electrically connected to the controlling unit;
the color compensating unit is configured for:
according to the light areas in a lightening state, determining a compensation area of the display panel; and
determining a compensating parameter of the compensation area; and
the controlling unit is further configured for, according to the compensating parameter, performing brightness regulation to the compensation area;
the color compensating unit comprises a first determining subunit and a second determining subunit;
the first determining subunit is configured for determining a displayed frame in the display panel corresponding to the light areas in the lightening state; according to frame pixels in the displayed frame, determining edge pixels; determining a quantity of the frame pixels; and according to the quantity of the frame pixels, determining a compensation area of the edge pixels, wherein the compensation area refers to an area where some of pixels other than the frame pixels among pixels corresponding to the light areas in the lightening state are located; and
the second determining subunit is configured for determining a pixel quantity of the compensation area; when the pixel quantity of the compensation area is less than a quantity of brightness-compensation ranks, determining the compensating parameter of the compensation area to be a zero grayscale; and when the pixel quantity of the compensation area is greater than or equal to the quantity of the brightness-compensation ranks, dividing the compensation area into a plurality of compensating sub-areas, wherein a quantity of the compensating sub-areas is equal to the quantity of the brightness-compensation ranks;
wherein pixels in a same compensating sub-area correspond to a same brightness-compensation ranks, the compensating parameters in a same brightness-compensation ranks are equal, and the compensating parameters in the brightness-compensation ranks are greater than or equal to a zero grayscale, and less than pixel grayscales of the edge pixels.

2. The brightness regulating method according to claim 1 , wherein the step of, according to the brightness parameters, regulating the brightnesses of the light areas comprises:
when a light region among the light regions is in the lightening state, renewing a brightness value of the light area, wherein the brightness value that has been renewed is equal to the brightness parameter; and
when a light region among the light regions is in an extinguishing state, maintaining the extinguishing state of the light area.

3. The brightness regulating method according to claim 1 , wherein the step of, according to the pixel quantities and the pixel grayscale values, determining the brightness parameters of the light areas comprises:
according to the pixel quantities and the pixel grayscale values, solving an average value of the pixel grayscale values corresponding to each of the light areas; and
regarding the average value of the pixel grayscale values corresponding to the light area as the brightness parameter of the light area.

4. The brightness regulating method according to claim 1 wherein compensating parameters of the compensating sub-areas gradually decrease in a first direction, wherein the first direction refers to a direction from an area where the frame pixels are located to the compensation area.

5. A brightness regulating system, wherein the brightness regulating system comprises: a controller and a backlight module that are electrically connected;
the backlight module is configured for providing a backlight source under controlling by the controller;
the controller comprises an area dividing and light regulating unit and a controlling unit;
the controlling unit and the area dividing and light regulating unit are electrically connected, and the area dividing and light regulating unit and the backlight module are electrically connected;
the area dividing and light regulating unit is configured for, when an area-delimitation controlling signal emitted by the controlling unit has been received, according to the area-delimitation controlling signal, dividing the backlight source into a plurality of light areas;
the controlling unit is configured for acquiring and storing pixel quantities and pixel grayscale values of pixels within pixel areas corresponding to each of the light areas; according to the pixel quantities and the pixel grayscale values, determining brightness parameters of the light areas; and emitting the area-delimitation controlling signal and a light regulating signal; and
the area dividing and light regulating unit is further configured for, after the light regulating signal has been received, acquiring the brightness parameters, and according to the brightness parameters, regulating the brightnesses of the light areas;
the system further comprises a display panel, the display panel is located on a light exiting side of the backlight module, and the display panel is electrically connected to the controlling unit;
the controller further comprises a color compensating unit, and the color compensating unit is electrically connected to the controlling unit;
the color compensating unit is configured for:
according to the light areas in a lightening state, determining a compensation area of the display panel; and
determining a compensating parameter

Assignees

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

Inventors

• Sha Jin
• Sun Hao
• Xu Bo
• Hu Meilong
• Zhang Zhi
• Luo Wencheng
• Chen Qiang
• Chen Yang

Classifications

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2320/0233

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

• G09G3/3426

  the different display panel areas being distributed in two dimensions, e.g. matrix · CPC title

• G09G3/36

  using liquid crystals · CPC title