seminar

1. SEMINAR PRESENTATION ON
OLED TECHNOLOGYAND ITS APPLICATIONS
ELECTRONICS AND COMMUNICATION
ENGINEERING
BY
P.JYOSHNA
18KF1A0418

2. 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.

3. 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.

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

5. STRUCTURE OF OLED:

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

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

8. 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

9. COLOUR GENERATION:

10. WORKING PRINCIPLE:
• 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.

11. TYPES OF OLED:
• Six types of OLEDs
• Passive matrix OLED(PMOLED).
• Active matrix OLED(AMOLED).
• Transparent OLED(TOLED).
• Top emitting OLED.
• Flexible OLED(FOLED).
• White OLED(WOLED).
•

12. 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.

13. OLED DISADVANTAGES:
• Expensive
• Lifespan
• Water damage
• Colour balance issues

14. APPLICATIONS:
• Major applications of OLED technology are
• OLED TV.
• Mobile phones with OLED screens.
• Rolltop Laptop.

15. 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.

16. THANK YOU