comparative study with other display options and applications.

1. 3/6/2013 1

2. Introduction
How OLED works?
Advantages over other technologies
Applications
Challenges
Conclusion
References
2

3. OLED (organic light-emitting diode) is a display
technology for use in mobile devices and televisions.
OLED describes a specific type of thin-film display
technology in which organic compounds form the
electroluminescent material.
3

4. Cathode
• Injects electrons
Emissive Layer
• polyflourene
Conductive Layer
• polyaniline
Anode
• Removes electrons
Substrate
• Clear plastic
4

5. Voltage applied across cathode and
anode
• Typically 2v-10v
Current flows from cathode to anode
• Electrons flow to emissive layer
• Electrons removed from conductive layer
leaving holes
• Holes jump into emissive layer
Electron and hole combine and light
emitted
5

6. Different colours
• Type of organic molecule in the
emissive layer
• 3 molecules used –RGB
Intensity / Brightness
• Amount of current
6

7. 7

8. Perpendicular cathode/anode
strip orientation
Light emitted at intersection
(pixels)
External circuitry
• Turns on/off pixels
Large power consumption
8

9. Full layers of
cathode, anode, organic molecules
Thin Film Transistor matrix (TFT)
on top of anode
• Internal circuitry to determine which
pixels to turn on/off
Less power consumed then Passive
Matrix OLED
• Used for larger displays
9

10. • Thinner, lighter and more flexible
• Plastic substrates rather then glass
• High resolution (<5um pixel size) and fast switching (1-10um)
• Do not require backlight, light generated
• Low voltage, low power and emissive source
• Robust Design (Plastic Substrate)
• Brighter- good daylight visibility
• Larger viewing angles -170o
10

11. 11

12. •The power consumption of the OLED panel is only
dependent on the pixels that are lit in the images.
•OLEDs have dynamic power consumption when
displaying different images.
•LCD with backlights consumes essentially constant power
disregarding the images that are displayed.
12

13. 13

14. Transparent OLED
• Only have transparent
components
(substrate, cathode and anode)
• When turned off, are up to 85
percent as transparent as their
substrate.
• When turned on, it allows light
to pass in both directions.
14

15. Foldable OLED
• substrates made of very flexible
metallic foils or plastics.
• Very lightweight and durable
reduces breakage.
• Attached to fabrics to create
"smart" clothing, such as
outdoor survival clothing.
15

16. White OLED
• White OLEDs emit white light
that is brighter, more uniform
and more energy efficient than
that emitted by fluorescent
lights.
• It can replace fluorescent lights
that are currently used in
homes and buildings.
16

17. • blue organics have much shorter lifetimes
• Expensive
• Susceptible to water
• Overcome multi-billion dollar LCD market
17

18. Expensive
Flexibility and thinness will enable many applications
OLED will replace current LED and LCD technologies
Integrated touch OLED display will be potential competitive item.
A good candidate of green solution for display.
18

19. Yu-Hsin Lin, Shih-Feng Hsu, Chung-Chun Lee, Wei-Pang Huanga AU Optronics Corp., “AMOLED AS A
GREEN SOLUTION FOR DISPLAY”. Organic Light Emitting Materials and Devices XIII, edited by Franky
So, Chihaya Adachi, Proc. of SPIE Vol. 7415, 74150W · © 2009 SPIE · CCC code: 0277-786X/09/$18
Bardsley, James. "International OLED Technology Roadmap." IEEE JOURNAL OF SELECTED TOPICS IN
QUANTUM ELECTRONICS. Jan. 2004. IEEE.
<http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=01288066>.
Freudenrich, Craig, Ph.D. "How OLEDs Work”. Howstuffworks. 2008.
<http://electronics.howstuffworks.com/oled.htm>.
OLED-info. "OLED Lights and Sony OLEDs." OLED displays and television resources, info and news.
2008.<http://www.oled-info.com/>.
19

20. THANK YOU
20

21. QUERIES
21