What is AMOLED?

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AMOLED means Active Matrix Organic light emitting diode

Active matrix (AM) OLED displays stack cathode, organic, and anode layers on top of another layer - or substrate - that contains circuitry. The pixels are defined by the deposition of the organic material in a continuous, discrete "dot" pattern. Each pixel is activated directly: A corresponding circuit delivers voltage to the cathode and anode materials, stimulating the middle organic layer. AM OLED pixels turn on and off more than three times faster than the speed of conventional motion picture film - making these displays ideal for fluid, full-motion video.

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The worldwide AM-OLED market will grow to US$4.6 billion by 2014, representing a CAGR of 83.3 percent, up from US$67 million in 2007, according to iSuppli Corp. In terms of shipments that is expected to grow to 185.2 million units by 2014, rising at a compound annual growth rate (CAGR) of 84.2 percent up from 2.6 million units in 2007.
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Two primary TFT backplane technologies, poly-Silicon (poly-Si) and amorphous-Silicon (a-Si) are used today in AMOLEDs.
Passive-Matrix Structure ------------------------ Active Matrix Structure
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Devices with AM-OLED Displays:

Nokia N85

ZDNET about the Nokia N85 with a 2.6 inch 240×320 OLED display with support for up to 16 million colors:
The OLED display looks fantastic. The colors are bright and evenly lit with no side or backlighting. The display is viewable for virtually any angle and looks great in the dark and in direct sunlight.
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Nokia N85 with an 2.6" LCD TFT vs AMOLED Display

Cowon S9

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Engadget about the Cowon S9 3.3 inch AMOLED
We have to assume that the 3.3-inch AMOLED display is one of the S9's biggest selling points, and for good reason. The 480 x 272 resolution screen is positively gorgeous to look at, displaying rich, vivid colors on everything lucky enough to tickle its pixels. Video looked superb, images were almost unbelievably sharp and bright, and the overall user interface was quite a joy to gaze at. Couple that with the fact that it's a capacitive touchscreen and you can understand why we're pretty much head over heels on the panel. Other PMP makers should definitely give AMOLED a look; it sucks down less juice, it's brighter and sharper in every circumstance and it makes users (or us, at least) actually want to watch videos on it.

Compared to a traditional TFT-LCD screen, the Samsung WB1000's AMOLED consumes less power and offers a higher contrast ratio of 10,000:1, producing darker black levels, more vibrant colors, and a brighter display which can easily be viewed outdoors, and even in direct sunlight. Additionally, unlike a TFT-LCD, the WB1000's AMOLED screen has the ability to display images that can be reviewed at any angle, while fully maintaining the same color gamut.
See the different:

Kodak World first Wireless Photoframe

Eastman Kodak Company today introduced the world's first consumer-available wireless picture frame featuring innovative Organic Light Emitting Diode (OLED) technology, a Kodak invention that produces exceptionally sharp and vivid image quality. The frame will be on display at the Kodak booth (Hall 5.2) at Photokina.
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