The device doesn't have to power these pixels because they are originally black in the first place. Also this gives the device a lot longer time to leave the device on.
OLED burn-in occurs when certain pixels on the screen degrade faster than others, leading to permanent image retention. To prevent or minimize OLED burn-in, it is recommended to avoid displaying static images for extended periods, lower screen brightness, use screen savers, and enable pixel shifting features if available.
The basic OLED TV design (called a "True-OLED" TV) uses 3 color OLED sub-pixels (Red, Green and Blue) to create each 'pixel'. But some companies are using a different archicture, called WOLED-CF which uses four white OLED subpixels with color filters on top (RBG and W). This is also called a RGBW design. The WOLED-CF technology was developed by Kodak (and the IP is now owned by LG Display), and it should make the OLED panel easier to make. However it will also be less efficient. LG Display's OLED TVs which will be released in 2012 will be based on this design.
it has 20 megapixels
Red and black pixels.
They are most likely dead pixels.
OLED panels are more energy-efficient than LCD and Plasma panels because they do not require a backlight to produce light. LCD panels use a backlight to illuminate the pixels, while Plasma panels use charged gas to create light. OLED panels have simpler construction compared to LCD and Plasma panels because they consist of organic compounds that emit light when an electric current is applied, eliminating the need for additional layers found in LCD and Plasma panels.
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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.
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.