Liquid crystal display backlight control method with combination of static and dynamic control

Abstract

The invention relates to a TV set, and aims to solve problems in the prior art that a dynamic contrast of a liquid crystal display (LCD) TV screen is poor, a bright image cannot be reproduced, a backlight may appear too bright or too dark, a user cannot adjust brightness, and an expected brightness effect by the user cannot be obtained. An LCD backlight control method with combination of static and dynamic control, according to the invention, comprises the following steps: first, a user menu backlight brightness value is set; second, according to the user menu backlight brightness value, a static mapping value is calculated; third, according to image information, a dynamic backlight adjustment value is calculated; and finally, according to the static mapping value and the dynamic backlight adjustment value, a backlight brightness final value is calculated and a backlight control is carried out according to the backlight brightness final value. The LCD backlight control method with the combination of the static and dynamic control is applicable to the liquid crystal display.

Description

technical field [0001] The invention relates to a television set, in particular to a backlight display screen of a liquid crystal television. Background technique [0002] With the increasing demand for energy saving, consumption reduction and environmental protection, backlight adjustment technology has become a key technology for LCD TV energy saving. At present, there are two methods to adjust the backlight to achieve energy saving: static control, the user controls the backlight brightness option on the menu of the LCD TV through the remote control, and performs static setting of the backlight; dynamic control, based on graphic information such as image average brightness and brightness histogram , carry out dynamic calculation and dynamic adjustment of the backlight amplitude, that is, count and process the real-time image content at regular time intervals to obtain the weighted brightness value of the image, and then set the weighted brightness value within the range o...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that under the static control of the LCD TV display screen in the prior art, the backlight value works at a fixed value according to the user setting, the dynamic contrast is poor, and the bright picture cannot be reproduced well. Working within a fixed threshold range, affected by the brightness difference of different LCD screens, it may be too bright or too dark, and the user cannot adjust it, and the brightness effect expected by the user cannot be obtained.