Light-Emitting Diode TV Led TV Purposes and eco-compatible TV Digital terrestrial TV Two major types of broadcasting exist for television; the so-called analogue and digital television. The analogue television appeared the first. This is widely spread around the world. However, this type of diffusion is ageing and not very innovative. For this reason analogue television is currently tending to disappear to give way to digital television. Digital television is largely based on analogue television. The s because of their drop in energy consumption, are said to be \Led\; the acronym of Light-Emitting Diode in English. We will retain all short \diode\. General principle : a white light colour and form images When examined closely, each point on the screen is actually composed of three sub-items : the sub-pixels (red, green, blue), each more or less intensely lit. These points, behind white \lamps\ which emit a light constituting the backlight; backlight in English.