OLED (organic light-emitting diode) is an emerging display technology that uses thin films of organic molecules to emit light when electricity is applied. Key advantages of OLEDs include thinner/lighter/more flexible displays without needing a backlight, as well as higher contrast ratios, brighter colors, and wider viewing angles. The first OLED device was developed in 1987, and now many companies are developing various OLED displays for applications like phones, TVs, and more. The basic structure of an OLED involves organic layers sandwiched between an anode and cathode, and different layer deposition and pixel approaches can generate red, green, and blue colors or white light.

1. U.NIKHILESH – 18JN1A0419
C.RAJESH – 18JN1A0420

2. OLED
ORGANIC LIGHT
EMITTING DISPLAY

3. Introduction
• Uses 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

4. What is an OLED?
• OLEDs are solid state devices composed of thin films of
organic molecules that is100 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.

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.

6. Features
• Flexibility.
• Emissive Technology.
• Light weight and thin.
• Low power consumption.
• High contrast, brighter and perfect display from all
angles.

7. Structure of OLED(Figure)

8. OLED Fabrication
• Substrate preparation.
• Device deposition
• Deposit and pattern anode.
• Pattern organic layers.
• Vacuum deposit and pattern cathode.
• Encapsulation.
• Also involves making backplane.

9. OLED Deposition
• Organic layers can be applied to the
substrate using the following methods.
- Evaporation and shadow masking.
- Inkjet printing.
- Organic vapor phase deposition.

10. Colour Generation
• Different approaches for fabricating red, green and
blue pixels.
- Red, green and blue individual pixels.
- White emitter and colour filters.
- Blue emitter and colour converters.
- Stacked OLED

11. Colour Generation(figure)

12. 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.

13. Working Principle(figure)

14. Types of OLED
Passive matrix OLED(PMOLED).
Active matrix OLED(AMOLED).
Transparent OLED(TOLED).
Top emitting OLED.
Flexible OLED(FOLED).
White OLED(WOLED).

15. OLED Advantages
• Thinner, lighter and more flexible.
• Do not require backlighting like LCDs.
• Can be made to larger sizes.
• Large fields of view, about 170 degrees.
• Faster response time.
• Brighter.
• High resolution, <5μm pixel size.

16. OLED Disadvantages
• Expensive.
• Lifespan.
• Water damage.
• Colour balance issues .

17. References
• www.google.com
• www.wikipedia.com
• https://www.oled-info.com/
• www.pptplanet.com

18. Conclusion
• Organic Light Emitting Diodes are evolving as the next
generation displays.
• As OLED display technology matures, it will be better able
to improve upon certain existing limitations of LCD
including
• high power consumption
• limited viewing angles
• poor contrast ratios

19. THANK
YOU……