2 Background Organic Light Emitting Diode (OLED) Kodak scientist Dr. Ching (1970’s)OLED materials reported in 1987Color improvements by 1989Becoming a major competetor with today’s LCD/plasma displays
3 OLED/LED: What’s the diff? Both OLED and LED use the same principle of electroluminescence- the optical and electrical phenomenon where certain materials emit light in response to an electric current passing through it.OLEDLighter weightPerform at lower efficienciesLess power consumptionOrganic based chemicals
4 How It Works Composed of two substrate layers on the outside Emissive and conductive layer lie between the cathode and the anode layersA current is applied across the LED, where electrons move from cathode to anodeThe cathode gives electrons to the emissive layer, where the anode withdraws these electrons from the conductive layerThe emissive layer becomes rich in negative charge while the conductive layer becomes more positively chargedThe two charges recombine in the emissive layer, creating a drop in energy levels of the electronsThe drop in energy levels results in radiation that is on the visible spectrum, emitting light
5 OLED’s Today Various Mp3 players Kodak’s LS633 3mpx digital camera Muzio JM-200Sony NW-E015F WalkmanArcos 204Kodak’s LS633 3mpx digital cameraPriced at 399$Good battery life2.2” OLED screen
6 Continued…Mobile devicesApple iPhoneSony Ericsson W51S
7 OLED vs. Plasma/LCD Advantages Brighter, clearer picture More efficient viewing angleThinner, lighter in weightLow poweredCan be printed on various surfaces
8 …continued Disadvantages Short term battery life Expense Doesn’t like water
9 Why so Expensive? Uses ink-jet printing technology Sprays conductive polymer substances, instead of ink.
10 Future Developments Smaller sized OLED TV’s Middle-larger sized in development
11 Companies Samsungs 17 inch AMOLED display 12mm thick1600x1200 aspect ratioSony intends to give OLED technology a shot in 2008, making OLED TV’s.Toshiba is holding off until
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