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Transcript of 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
Future of OLEDs
Color balance issues
Efficiency of blue OLEDs