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While all three types of HDTV's have their own unique advantages and disadvantages, LCD has made strides to match the advantages of Plasma while maintaining the lowest price. LED's may have the most advantages, but their steep price is too much for the average consumer to afford.
Flat-panel LCD will continue to be the most popular HDTV technology due to falling prices and strong manufacturer support.
Many tiny cells between two panels of glass hold a mixture of noble gases. The gas in the cells is electrically turned into plasma which emits ultraviolet light which then excites phosphors to create visable light.
More 50-inch and larger models will be released. However, plasma televisions will remain less popular than LCD's.
A semiconductor diode is switched to cause electrons to combine with holes within the device which then releases energy in the form of photons. This effect is called electroluminescence and the color of light is determined by the energy gap of the semiconductor.
Many pixels filled with liquid crystals are positioned in front of a backlight to produce color images.
LED TV's will gradually replace LCD's over time. However, LED televisions will cost a premium in the upcoming years.