light emitting polymer- by m.s.koushik
DESCRIPTION
This presentation is about the next Gen display technology Light emitting polymer. It overcomes the disadvantages of LCD's and LED's and take you to to the next level of enjoying this technology.TRANSCRIPT
BY
M.S.KOUSHIK
ECE, GITAM HYD.
INTRODUCTION
• Light Emitting Polymer(LEP) is also called as
Organic Light Emitting Diode(OLED).• Different stages in display technology:
•
What is an OLED?• It is a polymer that emits light when voltage is
applied to it. • Polymers with metallic and semiconductor
characteristics are used in LEPs• Band gap of that material is 2.2 to 2.8 ev
Structure of an OLED
How LEPs Emit Light
Manufacturing
LEPs are manufactured in 2 ways.
1) Spin coating method :
2.Ink Jet Printing
Types of LEP’s based on matrix displays1)Active matrix OLED
2)Passive matrix OLED
Other types of LEP
Flexible Transparent Stacked
Top emitting OLED White OLED
Applications
• Cell phones • LEP TVs• Computer screens• Lights• Aircraft cockpit instrumentation• Photo voltaics
Advantages
• Low cost• Low power consumption• No viewing angle dependence• Better power efficiency• Less response time• Slimmer• Good for eyes• Self luminous• durability
Disadvantages
• Life span• Efficiency of blue OLEDs• Water damage• UV sensitivity
Conclusion
• OLEDs offer many advantages over both LEDs and LCDs.
• They are thinner, lighter and more flexible than the crystalline layers in an LED or LCD.
• They have large fields of view as they produce their own light.
• LEP technology is now set to change the products we use to view the world
References
• http://en.wikipedia.org/wiki/OLED• www.cdtltd.co.uk • www.research.philips.com • www.covion.com• www.lep-light.com• http://optics.org/cws/article/industry/37032 • http://www.oled-research.com/oleds/oleds-
history.html • http://www.technologyreview.com/energy/
21116• IEEE JOURNAL
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