The document discusses flexible displays, particularly those using organic light-emitting diode (OLED) technology, highlighting their structure, working principles, advantages, and disadvantages. It emphasizes the benefits of flexibility, reduced power consumption, and broader viewing angles while noting challenges such as shorter lifespans for some colors and expensive manufacturing processes. The conclusion suggests that flexible displays are evolving and have the potential to surpass traditional LCD and LED technologies.

1. FLEXIBLE DISPLAYS
NEERAJ KUMAR DAS
Reg.: 1305209006
MCA 4th semester
SILICON INSTITUTE OF TECHNOLOGY

2. CONTENTS
• Introduction
• OLED
• Structure of OLED
• Working principle of OLED
• Flexible OLED
• Advantages of Flexible displays
• Disadvantages of Flexible displays
• Concept devices
• Conclusion

3. INTRODUCTION
• A flexible display is a display which is flexible in nature.
• Uses organic light emitting diode (OLED).
• Offers brighter, thinner, high contrast, flexible displays.

5. OLED
• Main principle behind OLED technology is electroluminescence.
• They emit 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.

6. STRUCTURE OF OLED
1. Cathode (-)
2. Emissive layer
3. Emission of Radiation
4. Conductive layer
5. Anode (+)

7. WORKING PRINCIPLE OF OLED
• A voltage is applied across the OLED such that the anode is positive with
respect to the cathode.
• Current flows from cathode to anode through the organic layers.
• Cathode gives electrons to the emissive layer.
• Anode withdraws electrons from the conductive layer, leaving electron holes.
• Holes move into emissive layer .
• Electron and hole combine and emit light.

9. FLEXIBLE OLED
A flexible OLED is a type of OLED
incorporating a flexible plastic
substrate on which the
electroluminescent organic
semiconductor is deposited.

10. ADVANTAGES OF FLEXIBLE DISPLAYS
• Thinner, lighter ,flexible (uses plastic substrate instead of glass).
• Backlight not required hence consume less power.
• Large field of view about 170 degrees
• Low heat generation
• Low Power requirement
• Less prone to breakage when dropped

11. DISADVANTAGES OF FLEXIBLE DISPLAYS
• Lifetime - Red and green OLED films have longer lifetimes (46,000 to
230,000 hours), blue organics currently have much shorter lifetimes (up
to around 14,000 hours
• Manufacturing - Manufacturing processes are expensive right now.
• Water - Water can easily damage OLEDs. (As plastics are
semipermeable)

12. SAMSUNG YOUM

13. LG G FLEX

14. APPLE SMARTWATCH

15. CONCLUSION
• Flexible displays are evolving as the next generation displays.
• As FOLED display technology matures, it will be able to improve upon
certain existing limitations of LCD and LED.

16. REFERENCES
• http://en.wikipedia.org/wiki/Flexible_display
• http://en.wikipedia.org/wiki/OLED
• http://en.wikipedia.org/wiki/Flexible_organic_light-emitting_diode#Technical_details_and_applications
• http://www.cnet.com/news/what-you-should-know-about-flexible-displays-faq
• http://electronics.howstuffworks.com/oled.htm