Liquid crystal display television brightness adjustment system and method

Abstract

The invention provides a liquid crystal display television brightness adjustment system, which comprises a control device, an adjustment signal decoder, an adjustment signal selector, an image adjustment module, a backlight adjustment module, a liquid crystal display screen and a backlight, wherein the control device is used for generating an image brightness adjustment command, the adjustment signal decoder is used for receiving and decoding the image brightness adjustment command, the adjustment signal selector is used for generating a corresponding image adjustment signal to the image adjustment module or a brightness adjustment signal to the backlight adjustment module according to an adjustment mode designated by the decoded image brightness adjustment command, the image adjustment module is used for receiving the image adjustment signal to adjust the image brightness of the liquid crystal display screen, and the backlight adjustment module is used for receiving the brightness adjustment signal to adjust the glow brightness of the backlight. Since the system adopts a method of controlling the glow brightness of the backlight to control the image brightness of the liquid crystal display television, no impact is caused to the gray level of the image signal, the image quality at low brightness can be ensured and the goals of saving energy and prolonging the service life of the backlight are achieved at the same time.

Description

technical field [0001] The invention relates to backlight control technology, in particular to a liquid crystal television brightness adjustment system and method. Background technique [0002] At present, the LCD TV market is expanding rapidly. Due to the advantages of high brightness and high gray scale, LCD TVs are being favored by consumers and gradually becoming the mainstream products in the market. However, since the LCD screen is a passive display device, a separate backlight source must be provided to display images through the liquid crystal as a controllable light valve. Therefore, the current LCD TV has the following shortcomings: At night or when the ambient brightness is low, the glasses are prone to fatigue due to the high brightness of the screen. [0003] The existing method of adjusting the brightness of the LCD TV image is usually to change the brightness of the image by adjusting the gray scale of the image signal. This adjustment will reduce the gray sc...

AI Technical Summary

Problems solved by technology

However, since the LCD screen is a passive display device, a separate backlight source must be provided to display images through the liquid crystal as a controllable light valve. Therefore, the current LCD TV has the following shortcomings: At night or when the ambient brightness is low, the glasses are prone to fatigue due to the high brightness of the screen

[0003] The existing method of adjusting the brightness of the LCD TV image is usually to change the brightness of the image by adjusting the gray scale of the image signal. This adjustment will reduce the gray scale of the image and affect the image quality. It has not changed, which will not only cause loss of electric energy, but also shorten the service life of the backlight

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