OLED's are brighter than LEDs, OLED's do not require Backlighting. They are easier to produce and can be made to larger sizes. They are expensive, water easily damages them.
LG has stated their OLED TV will be released in early Q3 2012. Samsung has indicated there release will be in Q2.
ETL in OLED means electron transport layer.
Yes, AMOLED is a part of OLED only. Just that AMOLED are used only in mobile phones and cameras, whereas OLEDs are used by the TV manufacturers in making their OLED TV. I have even heard that LGs have unveiled their OLED TV in the recent CES and is planning to roll it out in the mid of this year.
So many brands are in line in making OLED TV. Some are Sony, Samsung, LG. Many more will be introducing the technology in the next year or two. Because of the simpler construction compared to LCD, OLED is likely to be the most common display in a few years from now.
OLED TV works on pixel emission concept and not on the backlight concept. So it takes less amount of power as compare LCD TV.
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OLED: Organic Light Emitting Diode.
The actual price hasn't been disclosed by any of the brands who unveiled their OLED TVs.
It is very true that everyone can not afford OLED TV. The expected price of LG OLED TV is into five figures. But it will be better confirmed when OLED TV will be launched.
An OLED screen is typically used in televisions that use a high definition display. The OLED light is what gives the high definition televisions a clear high definition picture.
Oled TVs use Organic light-emitting diodes. They are supposed to be crystal clear.