Everybody confuses this with HDTV. Then, they confuse LCD, DLP, Plasma, and ED. Basically, if you take this down, the quality of the signal starts off with analog then digital. Then you are going to have your ED panels and your HD panels. That is all the picture quality that they are able to display. And then, you have different technologies that are LCD, DLP, LCD rear projection, and direct view Plasma. You still have the CRT tube televisions. Those are all the different types of technologies from TVs.
CRT tube televisions, the direct view tubes are basically a stand alone technology. They, however, are limited in size. The largest wide screen that is readily available at the consumer market is a 34-inches. They are still the best picture quality, but people do not like them because they are so deep and they take up so much space.
The next would be LCD rear projection and DLP rear projection with LCOS, which is liquid crystal on silicon. With those technologies, you have basically a light source and a light box that thins light down a path. It is reflected through a light wheel in the DLP and three LCD panels in the LCD. That it is a reflected picture that you are seeing. Then last, the plasma and LCD direct views are actually looking at the screen that is creating the image.
HDTV's can range in price. High Definition ready televisions can range anywhere from 699 dollars depending on what you are looking at. I have got projectors that range up to 30,000 dollars.
