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Method and device for regulating back light brightness of display

A technology for backlight adjustment and display, which is applied to static indicators, cathode ray tube indicators, and light metering using electrical radiation detectors. slow effect

Active Publication Date: 2012-04-18
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a backlight processing method has at least the following disadvantages: due to the complicated calculation, the corresponding time is relatively long

Method used

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  • Method and device for regulating back light brightness of display
  • Method and device for regulating back light brightness of display
  • Method and device for regulating back light brightness of display

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings of the embodiments.

[0026] The invention detects the average brightness of the image and the change of the external ambient light in real time, and controls the backlight of the display according to the detected value. Before proceeding to specific steps, each parameter needs to be defined.

[0027] Define the threshold of the two backlight adjustment methods, define the minimum and maximum values ​​of the backlight brightness that can be adjusted, define the last average brightness value and the current read average brightness value, define the last average brightness value and the current read average brightness valu...

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Abstract

The invention relates to a method for regulating the back light of a display, comprising the following steps: computing image content brightness, and determining image content pulse width modulation according to the image content brightness; measuring surrounding environment brightness, and determining environment brightness pulse width modulation according to the environment brightness; computing a pulse width modulation output value on the basis of the determined image content pulse width modulation and the environment brightness pulse width modulation, and realizing the regulation of the back light brightness by controlling the pulse width modulation output value, wherein the computation of the image content brightness includes: weighting the memorized last average brightness value and the currently read average brightness value, and taking the weighted value as the brightness value of the image content; the computation of the pulse width modulation output value includes: adding the pulse width modulation determined by the image content and the pulse width modulation determined by the environment brightness and dividing 2. The invention also discloses a device for regulating the back light of the display. The invention can realize the fast regulation of the back light brightness of the display.

Description

technical field [0001] The invention relates to a method and a device for adjusting the brightness of a backlight of a display, in particular to a method and a device for adjusting the brightness of a backlight of a liquid crystal television. Background technique [0002] Most TVs on the market now have the function of adjusting the brightness of the backlight, especially for the automatic adjustment of the brightness of the backlight for the external ambient light. In dark situations, the display automatically reduces the brightness of the backlight, thereby reducing power consumption. [0003] In the prior art, the method for adjusting the brightness of the backlight of the display according to the ambient light: firstly, the brightness of the ambient light is measured, and then the brightness information of the TV backlight is selected according to the measured ambient light brightness, and then the received image signal is adjusted according to the measured ambient light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G5/10H04N5/57G01J1/42
Inventor 王建亮
Owner HISENSE VISUAL TECH CO LTD