Method and device for compensating image brightness automatically under liquid crystal television dynamic backlight

A dynamic backlight and image brightness technology, which is applied to color TV components, TV system components, TVs, etc., can solve problems such as image brightness decline, achieve the effects of reducing energy consumption, improving perceived brightness, and ensuring image quality

Active Publication Date: 2013-04-03
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology

[0005] The present invention proposes a simple and reliable automatic compensation method for image brightness under dynamic backlight, aiming at the problem of image brightness drop caused by reduction of backlight amplitude under dynamic backlight

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  • Method and device for compensating image brightness automatically under liquid crystal television dynamic backlight
  • Method and device for compensating image brightness automatically under liquid crystal television dynamic backlight
  • Method and device for compensating image brightness automatically under liquid crystal television dynamic backlight

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[0039]All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0040] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0041] The principle of automatic compensation method for image brightness under dynamic backlight of LCD TV is as follows: figure 1 shown, including the following steps:

[0042] The dynamic backlight target value acquisition step is to read the dynamic backlight target value output by the dynamic backlight module;

[0043] The contrast compensation maximum value acquisition step is to adjust the mapping relationship f between the user menu ...

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Abstract

The invention discloses a method and device for compensating image brightness automatically under liquid crystal television dynamic backlight and relates to liquid crystal television dynamic backlight and image brightness adjusting technology. The method and device is simple and reliable and aims at solving the problem that image brightness lowers due to the fact that a backlight range is reduced under the dynamic backlight. The method mainly includes the following steps: a dynamic backlight target value obtaining step: reading a dynamic backlight target value output by the dynamic backlight module; a contrast compensation maximum value obtaining step; a contrast user value obtaining step: converting a current user menu contrast into a contrast user value B according to a mapping relation f; a compensation method selecting step: if a backlight target value is smaller than a compensation upper limit, performing a step of contrast compensation; and the contrast compensation step including a contrast compensation middle value calculating step, a contrast compensation final value compensating step and the like.

Description

technical field [0001] The invention relates to a liquid crystal television dynamic backlight and image brightness adjustment technology, in particular to an image brightness automatic compensation method and device under the condition that the liquid crystal television uses a dynamic backlight to cause the image brightness to decrease. Background technique [0002] The power consumption of the LCD screen accounts for most of the power consumption of the entire LCD TV. The need to reduce energy consumption has led to a variety of dynamic backlight technologies. The software system calculates and controls the backlight according to the dynamic image content, and appropriately lowers the backlight brightness when it is unnecessary to maintain the highest constant backlight brightness. For example, the domestic authorized invention patent 201010300512.1 discloses a dynamic backlight technology. The main steps are: acquire the current image and temporarily store it in the memory...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/57G09G3/36
Inventor 杨晓胜王鑫江玲
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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