Each pixel in a plasma TV is made up of three phosphors - one red, one blue, and one green. They emit light when struck by beams of electrons. The quantity of light emitted depends on the intensity of the electron beam. It is the phosphors themselves that create the light one can see on a plasma screen.
On the other hand, LCD TVs use millions of crystal, which are suspended in a liquid that is sandwiched between transparent panels. A bright florescent light is in place behind this liquid crystal sandwich. The crystals are instructed to either let the light pass or block its passage. Color filters are used to determine color.
As far as size is concerned, both TVs were always thin, and so that question is something of a stalemate. For example, the difference between 3" and 5" seems to matter in case of certain models, but becomes almost immaterial when it comes to a large-screen TV.
In terms of the viewing area, however, plasma TVs have always been known for their larger sizes. And that holds true in general. Put in a different way, one will have a greater variety of plasma TVs to choose from when he/she is looking at the big models.But it should be kept in mind that LCD TVs, too, are steadily gaining ground.
Now comes the question of price. For a large-screen plasma TV and a large-screen LCD TV of the same size, the plasma TV would normally cost less. LCD TVs are, however, dropping in price, and it is highly likely that the two will be on equal footing in the price department quite soon. All else being equal, in the plasma vs. LCD TV battle, plasma tends to win on this one for the time being. But the battle goes on. About the Author