A display that produces an image by using a matrix of transparent electrodes, positioned in front of a gas- (plasma) filled cavity. The gas is contained in hundreds of thousands of tiny cells between the two plates, and when excited by the electrodes, acts like tiny fluorescent lights. Each pixel of the image comprises a red fluorescent light, a green one and a blue one. Just like a CRT television, the plasma display varies the intensities of the different lights to produce a full range of colours. Most plasma displays are not technically televisions, since they do not include a television tuner. They must be connected to a tuner, cable box or some other source such as a DVD or VCR. Plasma displays are popular because even large-screen models are only a few inches thick.
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