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TECHNICAL
SEMINAR
“ORGANICLIGHT EMITTING DIODE"
DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING
Submitted by
ANANTHA...
CONTENTS
• INTRODUCTION
• WHAT IS OLED?
• HISTORY
• FEATURES
• WORKING PRINCIPLE
• MANUFACTURING OF OLED
• TYPES OF OLED
•...
INTRODUCTION
 Organic light emitting diode(OLED).
 Emerging Technology for displays in devices.
 Main principle behind ...
OLED 2013-14
WHAT IS AN OLED?
 OLEDs are solid state devices composed of thin
films of organic molecules that is 100 to 5...
DEPT OF ECE, CBIT, KOLAR 5
HISTORY
 The first OLED device was developed by Eastman
Kodak in 1987.
 In 1996, pioneer prod...
DEPT OF ECE, CBIT, KOLAR 6
HISTORY (CONTD.)
 In 2002, approximately 3.5 million passive matrix
OLED sub-displays were sol...
DEPT OF ECE, CBIT, KOLAR 7
FEATURES
 Flexibility.
 Emissive Technology.
 Light weight and thin.
 Low power consumption...
DEPT OF ECE, CBIT, KOLAR 8
STRUCTURE OF OLED(FIGURE)
OLED 2013-14
DEPT OF ECE, CBIT, KOLAR 9
How OLED Works
OLED 2013-14
DEPT OF ECE, CBIT, KOLAR 10
WORKING PRINCIPLE
 A voltage is applied across the anode and cathode.
 Current flows from ca...
MANUFACTURING OF OLED
• Vacuum deposition or Vacuum Thermal evaporation
(VTE)
• Organic vapor phase deposition (OVPD)
• In...
DEPT OF ECE, CBIT, KOLAR 12
Types of OLEDs
• Passive-matrix OLED
• Active-matrix OLED
• Transparent OLED
• Top-emitting OL...
DEPT OF ECE, CBIT, KOLAR 13
1. Passive-Matrix OLED (PMOLED)
• Perpendicular cathode/anode
strip orientation
• Light emitte...
DEPT OF ECE, CBIT, KOLAR 14
• Full layers of cathode, anode,
organic molecules
• Thin Film Transistor matrix
(TFT) on top ...
DEPT OF ECE, CBIT, KOLAR 15
3. Transparent OLED(TOLED)
• Transparent substrate,
cathode and anode
• Bi-direction light emi...
DEPT OF ECE, CBIT, KOLAR 16
4. Top-emitting OLED(TEOLED)
• Non-transparent or
reflective substrate
• Transparent Cathode
•...
DEPT OF ECE, CBIT, KOLAR 17
5. Foldable OLED
• Flexible metallic foil
or plastic substrate
• Lightweight and
durable
• Red...
DEPT OF ECE, CBIT, KOLAR 18
6. White OLED
• Emits bright white light
• Replace fluorescent
lights
• Reduce energy cost for...
Advantages of OLED
DEPT OF ECE, CBIT, KOLAR 19
1. Very thin panel of approximately 1mm
2. Low power consumption
3. High br...
Advantages of OLED display over TFT-LCD
display
DEPT OF ECE, CBIT, KOLAR 20
1. Contrast Ratio
 Higher contrast ratio than...
DEPT OF ECE, CBIT, KOLAR 21
2.Viewing Angle
 Higher viewing angle up to 170 for constant
contrast ratio
OLED 2013-14
DEPT OF ECE, CBIT, KOLAR 22
3. Response Time
 Fast time response in order of <50 us
 Comparison by graphical point of vi...
DEPT OF ECE, CBIT, KOLAR 23
4. Backlight Function
 No backlight required in OLED display
 During black background OLED i...
DEPT OF ECE, CBIT, KOLAR 24
5. Power Efficiency
 OLED display is more power efficient
than TFT-LCD display
 For the same...
DEPT OF ECE, CBIT, KOLAR 25
OLED Disadvantages
• Lifetime
• White, Red, Green  46,000-230,000 hours
• About 5-25 years
• ...
DEPT OF ECE, CBIT, KOLAR 26
APPLICATIONS
Major applications of OLED technology are
 OLED TV.
 Mobile phones with OLED sc...
DEPT OF ECE, CBIT, KOLAR 27
OLED TV
OLED 2013-14
DEPT OF ECE, CBIT, KOLAR 28
MOBILE PHONES WITH OLED SCREEN
OLED 2013-14
SMART WATCH WITH OLED DISPLAY
DEPT OF ECE, CBIT, KOLAR 29
OLED 2013-14
DEPT OF ECE, CBIT, KOLAR 30
CONCLUSION
• Limited use caused by degradation of materials.
• OLED will replace current LED a...
DEPT OF ECE, CBIT, KOLAR 31
THANK YOU
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OLED 2014 PPT

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OLED 2014 PPT

  1. 1. TECHNICAL SEMINAR “ORGANICLIGHT EMITTING DIODE" DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING Submitted by ANANTHAKRISHNA G USN-1CK10EC002 UNDER THE GUIDANCE OF Mrs. KAVYA S Asst. Professor DEPT. OF ECE, CBIT KOLAR DEPT OF ECE, CBIT, KOLAR 1
  2. 2. CONTENTS • INTRODUCTION • WHAT IS OLED? • HISTORY • FEATURES • WORKING PRINCIPLE • MANUFACTURING OF OLED • TYPES OF OLED • ADVANTAGES AND DISADVANTAGES • APPLICATIONS • CONCLUTION DEPT OF ECE, CBIT, KOLAR 2 OLED 2013-14
  3. 3. INTRODUCTION  Organic light emitting diode(OLED).  Emerging Technology for displays in devices.  Main principle behind OLED technology is electroluminescence.  Offers brighter, thinner, high contrast, flexible displays. OLED 2013-14 DEPT OF ECE, CBIT, KOLAR 3
  4. 4. OLED 2013-14 WHAT IS AN OLED?  OLEDs are solid state devices composed of thin films of organic molecules that is 100 to 500 nanometres thick.  They emits light with the application of electricity.  They doesn’t require any backlight. i.e., they are self emitting.  They are made from carbon and hydrogen. DEPT OF ECE, CBIT, KOLAR 4
  5. 5. DEPT OF ECE, CBIT, KOLAR 5 HISTORY  The first OLED device was developed by Eastman Kodak in 1987.  In 1996, pioneer produces the world’s first commercial PMOLED.  In 2000, many companies like Motorola, LG etc developed various displays.  In 2001, Sony developed world’s largest fullcolor OLED OLED 2013-14
  6. 6. DEPT OF ECE, CBIT, KOLAR 6 HISTORY (CONTD.)  In 2002, approximately 3.5 million passive matrix OLED sub-displays were sold, and over 10 million were sold in 2003.  In 2010 and 2011, many companies announced AMOLED displays.  Many developments had take place in the year 2012. OLED 2013-14
  7. 7. DEPT OF ECE, CBIT, KOLAR 7 FEATURES  Flexibility.  Emissive Technology.  Light weight and thin.  Low power consumption.  High contrast, brighter and perfect display from all angles. OLED 2013-14
  8. 8. DEPT OF ECE, CBIT, KOLAR 8 STRUCTURE OF OLED(FIGURE) OLED 2013-14
  9. 9. DEPT OF ECE, CBIT, KOLAR 9 How OLED Works OLED 2013-14
  10. 10. DEPT OF ECE, CBIT, KOLAR 10 WORKING PRINCIPLE  A voltage is applied across the anode and cathode.  Current flows from cathode to anode through the organic layers.  Electrons flow to emissive layer from the cathode.  Electrons are removed from conductive layer leaving holes.  Holes jump into emissive layer .  Electron and hole combine and light emitted. OLED 2013-14
  11. 11. MANUFACTURING OF OLED • Vacuum deposition or Vacuum Thermal evaporation (VTE) • Organic vapor phase deposition (OVPD) • Inkjet Printing DEPT OF ECE, CBIT, KOLAR 11 OLED 2013-14
  12. 12. DEPT OF ECE, CBIT, KOLAR 12 Types of OLEDs • Passive-matrix OLED • Active-matrix OLED • Transparent OLED • Top-emitting OLED • Foldable OLED • White OLED OLED 2013-14
  13. 13. DEPT OF ECE, CBIT, KOLAR 13 1. Passive-Matrix OLED (PMOLED) • Perpendicular cathode/anode strip orientation • Light emitted at intersection (pixels) • External circuitry – Turns on/off pixels • Large power consumption – Used on 1-3 inch screens – Alphanumeric displays OLED 2013-14
  14. 14. DEPT OF ECE, CBIT, KOLAR 14 • 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 2. Active-Matrix OLED (AMOLED) OLED 2013-14
  15. 15. DEPT OF ECE, CBIT, KOLAR 15 3. Transparent OLED(TOLED) • Transparent substrate, cathode and anode • Bi-direction light emission • Passive or Active Matrix OLED • Useful for heads-up display – Transparent projector screen – Glasses OLED 2013-14
  16. 16. DEPT OF ECE, CBIT, KOLAR 16 4. Top-emitting OLED(TEOLED) • Non-transparent or reflective substrate • Transparent Cathode • Used with Active Matrix Device • Smart card displays OLED 2013-14
  17. 17. DEPT OF ECE, CBIT, KOLAR 17 5. Foldable OLED • Flexible metallic foil or plastic substrate • Lightweight and durable • Reduce display breaking • Clothing OLED OLED 2013-14
  18. 18. DEPT OF ECE, CBIT, KOLAR 18 6. White OLED • Emits bright white light • Replace fluorescent lights • Reduce energy cost for lighting • True Color Qualities OLED 2013-14
  19. 19. Advantages of OLED DEPT OF ECE, CBIT, KOLAR 19 1. Very thin panel of approximately 1mm 2. Low power consumption 3. High brightness 4. High contrast ratio of 10,000 : 1 5. Wide viewing angle of 170 6. Foldable display panel OLED 2013-14
  20. 20. Advantages of OLED display over TFT-LCD display DEPT OF ECE, CBIT, KOLAR 20 1. Contrast Ratio  Higher contrast ratio than TFT-LCD display  Better impression for higher brightness OLED 2013-14
  21. 21. DEPT OF ECE, CBIT, KOLAR 21 2.Viewing Angle  Higher viewing angle up to 170 for constant contrast ratio OLED 2013-14
  22. 22. DEPT OF ECE, CBIT, KOLAR 22 3. Response Time  Fast time response in order of <50 us  Comparison by graphical point of view OLED 2013-14
  23. 23. DEPT OF ECE, CBIT, KOLAR 23 4. Backlight Function  No backlight required in OLED display  During black background OLED is turned OFF  In LCD backlight is still required OLED 2013-14
  24. 24. DEPT OF ECE, CBIT, KOLAR 24 5. Power Efficiency  OLED display is more power efficient than TFT-LCD display  For the same power OLED display is more brighter OLED 2013-14
  25. 25. DEPT OF ECE, CBIT, KOLAR 25 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 OLED 2013-14
  26. 26. DEPT OF ECE, CBIT, KOLAR 26 APPLICATIONS Major applications of OLED technology are  OLED TV.  Mobile phones with OLED screens.  Smart watch with OLED screens. OLED 2013-14
  27. 27. DEPT OF ECE, CBIT, KOLAR 27 OLED TV OLED 2013-14
  28. 28. DEPT OF ECE, CBIT, KOLAR 28 MOBILE PHONES WITH OLED SCREEN OLED 2013-14
  29. 29. SMART WATCH WITH OLED DISPLAY DEPT OF ECE, CBIT, KOLAR 29 OLED 2013-14
  30. 30. DEPT OF ECE, CBIT, KOLAR 30 CONCLUSION • Limited use caused by degradation of materials. • OLED will replace current LED and LCD technologies • Expensive • Flexibility and thinness will enable many applications OLED 2013-14
  31. 31. DEPT OF ECE, CBIT, KOLAR 31 THANK YOU

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