Control system for playing back video and audio in liquid crystal television

Abstract

The invention discloses an audio-visual playing control system of a liquid crystal television, which is used for controlling an audio system, a display system and a backlight source system of a liquid crystal television. The control system of the present invention mainly maintains the activated state through an audio-visual control unit under normal conditions, and the audio-visual control unit receives a signal transmitted from an external control interface to decide to output an activation signal to single-activate the audio processing unit or single-activate the image The processing unit and the backlight system, or jointly activate the audio processing unit, the image processing unit and the backlight system, so as to realize the digital control of the LCD TV and achieve the purpose of energy saving.

Description

technical field [0001] The invention relates to an audio-visual play control system of a liquid crystal television, in particular to a control system applied to a single play mode or a joint play mode of video and audio of the liquid crystal TV. Background technique [0002] The electric drive method of the existing LCD TV is to convert the AC power input by the AC power supply into low-voltage DC power through an AC-to-DC power supply (the existing specifications are 5V, 12V, 24V, 48V, etc., and the output specifications are made by each manufacturer. set), the low-voltage direct current is provided to the low-voltage load of the TV, which may include display driver panels, video processing circuit boards, speakers and other equipment, and the low-voltage direct current is output separately to a high-voltage power conversion system, the high-voltage conversion system makes the low-voltage direct current boosted to output high-voltage electricity to drive a high-voltage load...

AI Technical Summary

Problems solved by technology

[0003] However, the use of LCD TVs with digital functions only involves changing the image signal processing method to digital encoding, and therefore can add many digital functions to LCD TVs, such as adding digital image memory card readers to digital TVs. After inserting the digital image memory card shot and recorded by the digital camera, the user can transform the LCD TV into an LCD electronic photo frame to watch photos, and it can also be used to add a radio tuner function to the LCD TV, or directly connect an audio-visual digitally The player enables the LCD TV to play music directly. However, it can be seen from the existing products that when the user selects either the photo viewing function or the music playback function, all the power systems of the LCD TV are fully turned on. In this way, the components that do not need to be operated will still consume power, especially when the user uses the music playback function alone, if the backlight system and the image processing system are still turned on, not only the power consumption will increase, but also cause Its service life is shortened rapidly and LCD TVs are eliminated in advance

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