This article gives the implementation and the structure of CCTV display system, introduces the application of multimedia display boards in TV display system.

介绍了闭路电视显示系统的组成和实现方法，叙述了多媒体显示屏在电视显示系统中的应用。

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LCD TV panels of light transmittance is very low, to produce TV backlight brightness the display needed will need to provide adequate light intensity, and backlight system needs to consume more power.

液晶面板的光透射率极低，要产生电视需要的显示亮度就需要背光提供足够的光强，背光系统需要消耗较多的电能。

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Set Top Box (STB) receives and transforms digital TV signals into the signals which analog TV sets can display. It's an important transition product of DTV System.

机顶盒用于数字电视系统中将数字信号转变成模拟电视可以接收的信号，它是数字电视的过渡型产品。

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