Dynamic local dimming display control method and device and display device

A display control method and local dimming technology, applied to static indicators, instruments, etc., can solve problems such as gray scale overflow

Active Publication Date: 2020-07-24
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a dynamic local dimming display control method and device, and a display device, which are used to solve the problem that the existing dynamic local dimming technology easily causes gray scale overflow

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  • Dynamic local dimming display control method and device and display device
  • Dynamic local dimming display control method and device and display device
  • Dynamic local dimming display control method and device and display device

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Embodiment Construction

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0062] Among the related dynamic local dimming methods, the average method, square root method, maximum method and other methods adopted earlier adopt a simple method to determine the backlight control signal, but the disadvantage is that the overflow rate cannot be controlled at all.

[0063] With the increase of onboard computing resources, backlight determination algorithms based on pixel statistics can improve the control of overflow rate to a ...

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Abstract

The invention provides a dynamic local dimming display control method, a dynamic local dimming display control device and a display device. The method comprises the following steps of: determining a gray scale statistical function of each display partition according to the gray scale of an image to be displayed; gray scale control parameters of all the display partitions are obtained, and the grayscale control parameters are related to the overflow rate; calculating a backlight control signal of each backlight subarea according to the gray scale control parameter and the gray scale statistical function of each display subarea; determining a compensated gray-scale value according to the backlight control signal of each backlight subarea and a backlight diffusion model; and performing imagedisplay according to the compensated gray-scale value. According to the invention, the pixel overflow rate in pixel compensation can be ensured not to be higher than the preset value.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a dynamic local dimming display control method and device, and a display device. Background technique [0002] In the field of high-brightness display, due to the inherent light leakage phenomenon of liquid crystal display panels, the contrast of the display screen will decrease. In order to improve the contrast of the display screen, dynamic local dimming technology is widely used in the field of high-quality display. Different from the uniform backlight used in the traditional LCD panel lighting, the dynamic local dimming technology adopts a partitioned backlight scheme, which divides the LCD panel into M*N (rows*columns) partitions, each partition has an independently controllable When displaying a dark picture, the brightness of the backlight can be reduced to reduce light leakage and improve the contrast of the picture. At the same time, lowering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G3/3426G09G2320/0626G09G2360/16G09G2320/0233G09G2320/0285G09G2320/0242G09G3/2007
Inventor 石炳川马希通饶天珉
Owner BOE TECH GRP CO LTD
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