Oled devices and applications
Download
1 / 23

OLED Devices and Applications - PowerPoint PPT Presentation


  • 74 Views
  • Uploaded on

OLED Devices and Applications. By Sarkis Arabyan 23449826 12/4/08. Outline. Motivation How OLED works Types of OLEDs Advantages and Challenges Current and Future Applications. Motivation. 41 in Samsung Prototype. How OLED Works. Cathode Emissive Layer Conductive Layer Anode

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'OLED Devices and Applications' - nile


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Oled devices and applications

OLED Devices and Applications

By Sarkis Arabyan

23449826

12/4/08


Outline
Outline

  • Motivation

  • How OLED works

  • Types of OLEDs

  • Advantages and Challenges

  • Current and Future Applications


Motivation
Motivation

41 in Samsung Prototype


How oled works
How OLED Works

  • Cathode

  • Emissive Layer

  • Conductive Layer

  • Anode

  • Substrate


How oled works1
How OLED Works

  • 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


How oled works2
How OLED Works

  • Different Colors

    • type of organic molecule in the emissive layer

    • 3 molecules used -RGB

  • Intensity/brightness

    • amount of current


Types of oleds
Types of OLEDs

  • Passive-matrix OLED

  • Active-matrix OLED

  • Transparent OLED

  • Top-emitting OLED

  • Foldable OLED

  • White OLED


1 passive matrix oled pmoled
1. Passive-Matrix OLED (PMOLED)

  • Perpendicular cathode/anode strip orientation

  • Light emitted at intersection (pixels)

  • External circuitry

    • Turns on/off pixels

  • External circuitry

  • Large power consumption

    • Used on 1-3 inch screens

    • Alphanumeric displays


2 active matrix oled amoled
2. Active-Matrix OLED (AMOLED)

  • 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 PMOLED

    • Used for larger displays


3 transparent oled toled
3. Transparent OLEDTOLED

  • Transparent substrate, cathode and anode

  • Bi-direction light emission

  • Passive or Active Matrix OLED

  • Useful for heads-up display

    • Transparent projector screen

    • glasses


4 top emitting oled teoled
4. Top-emitting OLEDTEOLED

  • Non-transparent or reflective substrate

  • Transparent Cathode

  • Used with Active Matrix Device

  • Smart card displays


5 foldable oled
5. Foldable OLED

  • Flexable metalic foil or plastic substrate

  • Lightweight and durable

  • Reduce display breaking

  • Clothing OLED


6 white oled
6. White OLED

  • Emits bright white light

  • Replace fluorescent lights

  • Reduce energy cost for lighting

  • True Color Qualities


6 white oled1
6. White OLED

Cellphone backlight white OLED vs standard LED from Organic Lighting Technologies LLC


Oled advantages over led and lcd
OLED Advantages over LED and LCD

  • 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)

  • Larger sized displays

  • Brighter- good daylight visibility

  • Larger viewing angles -170o


Oled disadvantages
OLED Disadvantages

  • Lifetime

    • White, Red, Green  46,000-230,000 hours

      • About 5-25 years

    • Blue  14,000 hours

      • About 1.6 years

  • Expensive

  • Susceptible to water

  • Overcome multi-billion dollar LCD market


Applications
Applications

Kodak LS633 EasyShare with OLED display

The Sony 11-inch XEL-1 OLED TV

  • Samsung Roadmap

    • 2009 - 14,15, and 21 inch OLED panel

    • 2010 - 40 to 42 inch full HD OLED panel

  • Toshiba Roadmap

    • 2009 – 30 inch Full HD panel


Applications1
Applications

From OLED Technology Roadmap


Applications2
Applications

A 2'x2' white light prototype by GE

World’s First OLED Lamp


Applications3
Applications

http://www.oled-info.com/buy-oled


Conclusions
Conclusions

  • Limited use caused by degradation of materials.

  • OLED will replace current LED and LCD technologies

  • Expensive

  • Flexibility and thinness will enable many applications


Work cited
Work Cited

  • 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/>.

  • Organic Lighting Technologies. "Technology." Organic Lighting Technologies LLC. 2006. <http://www.o- lite.com/technology.htm>.


Q&A

Thank You!


ad