TV wise what are the real differences in an LCD, LED, and plasma TV?

TV wise what are the real differences in an LCD, LED, and plasma TV?
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1 Answer

Answer :

LCD – Liquid Crystal Display LED – Light Emitting Diode An LCD screen uses tiny liquid crystal ‘light valves’ to let light through from behind, or not. The light behind is typically a cold-cathode flourescent tube that’s always on behind the LCD layer. Most “LED” tvs are LCD TVs that use LED backlight instead of flourescent and those consume less power than flourescent but they are always on too. There are some OLED (organic light emitting diode) tvs that actually emit light from tiny colored LEDs and have no backlight. They not only consume way less power because there is no backlight but can achieve much blacker blacks for higher contrast. OLED are also Very Expensive at this time. A plasma screen operates like the old picture tubes (CRT cathode ray tube) but has a few million electron emitters at the back of the screen instead of one big one. Plasma screens can be brighter than the other two flat screen technologies but they also consume a lot more power than they do. @jerv gave a great description recently of why counter-intuitively LCD/LED TVs consume the least power when displaying an all-white screen. While traditional CRT tube TVs, and the newest OLED consume the least with a black screen
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