Friday, March 27, 2009

Unleashing Plasma TV

It is a flat panel display, which is commonly used for large television screens. Plasma displays are bright and have a low-luminance level in relation to an LCD screen. Its power consumption depends largely on the picture content whereby brighter pictures draw more power than the darker ones. A plasma television display consists of two plates of glass that hold thousands of small cells containing xenon and neon gases. Long electrodes are placed between the glass plates on both sides of the cells. The control circuits of a plasma television charge the electrodes to generate a potential difference. The voltage difference results in the ionization of gases, forming plasma. The collision of the gas ions while they move towards the electrodes, results in the emission of photons. Each pixel of a plasma display is made of three subpixel cells of red, blue and green colored phosphors. The intensity of each of the subpixel colors can be increased or decreased by varying the current flowing through them, thus creating different combinations of red, green and blue. This is why, plasma TV can produce most of the visible colors and give an enriched user experience.

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