LCD LED and Plasma HDTV Differences
LCD is an acronym for Liquid Crystal Display. Without going into the technical details, you can think of this technology as having an electronically adjusted filter for each pixel that can vary the color and brightness of the light. This requires a light source behind the LCD element, which is usually a fluorescent tube.
LED stands for Light Emitting Diode. The primary difference between this and the LCD displays is that LED sources replace the fluorescent tube. This results in much less heat generation and power consumption.I was looking for more information and found it here. This type of screen also provides a better picture quality than the LCD type.
Plasma TVs use tiny gas-filled capsules that are essentially miniature fluorescent bulbs. The light excites phosphors on the surface of the capsule that create the color and intensity of the pixel. This means that each pixel in the screen more or less functions as a small CRT. Plasma screens consume the most power and generate the most heat of the three types.
In addition, the different types of screens are better suited to different lighting and viewing conditions so you should do additional research to find which type of screen would perform best in your living room. These resources are readily available online.