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Hans Juneby

on 22 October 2014

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Transcript of OLED

What is an OLED?
An OLED is any light emitting diode in which an emissive electroluminescent layer is composed of a film of organic compounds.
How do OLEDs Emit Light?
Types of OLEDs
Transparent OLEDs have only transparent components (substrate, cathode and anode) and, when turned off, are up to 85 percent as transparent as their substrate.

Top-emitting OLEDs have a substrate that is either opaque or reflective. They are best suited to active-matrix design. Manufacturers may use top-emitting OLED displays in smart cards.
Freudenrich, Ph.D., Craig. "How OLEDs Work" 24 March 2005. HowStuffWorks.com. <http://electronics.howstuffworks.com/oled.htm> 12 October 2014.

The organic layer is between strips of cathode and anode that run perpendicular.
The intersections form the pixels
Easy to make
Use more power
Best for small screens
Full layers of cathode and anode
Anode over lays a thin film transistor (TFT).
Requires less power
Higher refresh rates
Suitable for large screens
Advantages and Disadvantages of LEDS
Lower cost in the future
Lightweight and flexible plastic substrates
Wider viewing angles and improved brightness
Better power efficiency and thickness
Response time
Future of OLEDs
Short lifetime
Color balance issues
Expensive manufacturing
Water damage
Efficiency of blue OLEDs
Outdoor performance
Power consumption
Transparent OLED
Flexible OLED
Full transcript