To put it simply, the LCD module is the screen + backlight assembly. The display component of the LCD TV is the liquid crystal module, which is equivalent to the picture tube in the CRT. Other parts include power supply circuits, signal processing circuits, etc., and of course the housing. Modules are mainly divided into screen and backlight components. The two parts are assembled together, but are independent of each other when working (that is, the circuits are not related).

The principle of liquid crystal display is that the backlight assembly emits uniform surface light, and the light is transmitted to our eyes through the LCD screen. The function of the screen is to process these lights by pixels to display images. Both parts contain a large number of components, so I won't go into details here. At present, the best technology is Sharp, followed by Samsung Sony.