Plasma was the first type of large screen over 35 inches which came on the market. Panasonic has led this industry with their very reliable, extremely high quality panel sets which they have manufactured for well over 10 years. Plasma TV uses a plasma gas in a sealed panel which, by influencing the gas with the proper electrical impulses, allows the gas to both glow and provide imaging. Many people have heard that plasma TV is unreliable. This is just not true. Panasonic TV is the very highest rated brand according to Consumers Union.