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Method for obtaining diffusion transmission parameters of backlight source, display control method and device

A technology for transmitting parameters and backlight sources, applied in optics, nonlinear optics, static indicators, etc., can solve problems such as large differences in backlight brightness, affecting display effects, and inability to compensate for real changes in backlight, achieving good image quality and reducing The effect of image distortion and high contrast

Active Publication Date: 2021-03-16
BOE TECH GRP CO LTD +1
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Problems solved by technology

However, after the backlight is dynamically adjusted, the brightness of each backlight varies greatly, and the LCD compensation image obtained in the related art cannot effectively compensate for the real change of the backlight, seriously affecting the final display effect

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  • Method for obtaining diffusion transmission parameters of backlight source, display control method and device
  • Method for obtaining diffusion transmission parameters of backlight source, display control method and device
  • Method for obtaining diffusion transmission parameters of backlight source, display control method and device

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Embodiment Construction

[0079] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0080] Local dimming technology is mainly used in direct-lit backlight dot-matrix display devices, and achieves the effect of reducing backlight power consumption and improving picture contrast by locally adjusting the brightness of each backlight area. In related technologies, the brightness of the backlight is directly set according to the gray scale of the displayed image, and LCD display compensation is performed according to the brightness of the backlight area at the pixel position. In the current backlight module, the reso...

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Abstract

A method for acquiring backlight diffusion transmission parameter, a display control method and a display control device are provided. The method includes: selecting a plurality of backlight sources respectively arranged at different backlight regions of a display device and measuring a light diffusion data for each of the plurality of backlight sources, where the light diffusion data includes luminance values of a plurality of pixel points of a screen of the display device and a distance between a position of each pixel point and a position of a certain backlight source of the plurality of backlight sources in the case that only the certain backlight source is turned on; preprocessing the light diffusion data to determine effective pixel points of the plurality of pixel points; fitting the light diffusion data of the effective pixel points, to obtain a point spread function y=ƒ(x) indicating a relationship between y representing a diffusion luminance value and x representing a diffusion distance, where y representing a diffusion luminance value is a luminance value of each pixel point, and x representing a diffusion distance is a distance between a position of the each pixel point and a position of a certain backlight source of the plurality of backlight sources; and determining the point spread function y=ƒ(x) as the backlight diffusion transmission parameter.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a method for acquiring diffusion transmission parameters of a backlight source and a display method and device using the method. Background technique [0002] A liquid crystal display device needs a backlight module to provide a light source. The traditional display method is to provide a uniform backlight, and control the brightness (gray scale) of the output image by controlling the deflection of the liquid crystal. In recent years, with the enhancement of the controller's computing capability and the advancement of technology, a new idea of ​​local dynamic dimming (local dimming) has been proposed. By dimming the backlight corresponding to the darker area of ​​the display image, and correspondingly compensating the display signal of the LCD (liquid crystal display device) in the display control, the same display effect as that of the full-brightness backlight can be a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/34
CPCG09G3/3406G09G3/36G09G3/3426G09G2360/145G02F1/133601G02F1/133603G02F1/133606G02F1/133611
Inventor 姬治华史天阔张小牤孙一郎习艳会褚怡芳时凌云刘传军
Owner BOE TECH GRP CO LTD
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