Backlight compensation method and device for liquid crystal display image, storage medium and terminal

A backlight compensation and image technology, applied in static indicators, instruments, etc., can solve the problems of image contrast decline and poor image effect, and achieve the effect of avoiding contrast decline, preventing the loss of local details, and improving image quality.

Active Publication Date: 2020-05-05
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

For another example, when the estimated backlight value is not accurate enough, it may result in poor image effect after compensation, or, in order to avoid oversaturation, the contrast of the image may decrease

Method used

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  • Backlight compensation method and device for liquid crystal display image, storage medium and terminal
  • Backlight compensation method and device for liquid crystal display image, storage medium and terminal
  • Backlight compensation method and device for liquid crystal display image, storage medium and terminal

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Embodiment Construction

[0040] As mentioned in the background art, it is difficult in the prior art to save the local details of the liquid crystal display image while saving the power consumption of the liquid crystal display image.

[0041] Specifically, the liquid crystal display system satisfies the following formula: Among them, I full It is the brightness that the human eye can perceive when the brightness of the backlight is not adjusted, BL full is the unadjusted backlight brightness, CV full The pixel value of the displayed image when the backlight brightness is not adjusted.

[0042] If the backlight value of the image to be displayed is reduced, the following formula must be satisfied: Among them, I reduce The brightness that the human eye can perceive when adjusting the brightness of the backlight, BL reduce is the adjusted backlight brightness, CV reduce It is the pixel value of the displayed image after adjusting the brightness of the backlight.

[0043] In order to make the br...

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Abstract

The invention discloses a backlight compensation method and device for a liquid crystal display image, a storage medium and a terminal. The backlight compensation method comprises the steps that calculating a brightness component histogram of an image in an HSV color space; determining the brightness and contrast type of the image according to the pixel distribution proportion of the brightness component histogram; estimating a backlight value of the image according to the determined image brightness and contrast type; and performing backlight compensation on a low-frequency part image and a high-frequency part image based on the backlight value, and the low-frequency part image and the high-frequency part image being obtained by performing frequency division processing on the images. Through the technical scheme provided by the embodiment of the invention, the backlight power consumption of the liquid crystal display image can be saved, and local details of the liquid crystal displayimage can be stored as much as possible.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a backlight compensation method and device, a storage medium, and a terminal for liquid crystal display images. Background technique [0002] Liquid crystal display devices (for example, Liquid Crystal Display (LCD for short)) have the disadvantages of low contrast and high power consumption. At present, backlight dimming technology is mainly used to improve the contrast of liquid crystal display and reduce power consumption. [0003] In the prior art, when adjusting the backlight of the liquid crystal display device, in order to keep the brightness of the displayed image unchanged, backlight compensation is usually performed on the low-brightness part of the original image to increase the brightness, and the high-brightness part is backlight compensated with the same proportional coefficient and different ratios. Coefficient of backlight compensation to avoid brig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
CPCG09G3/3406G09G3/3607G09G2320/0271G09G2320/062
Inventor 赵青青韦虎吴冠林
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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