FLEXIBLE DISPLAYS

NEERAJ KUMAR DAS

Reg.: 1305209006

MCA 4th semester

SILICON INSTITUTE OF TECHNOLOGY

CONTENTS

• Introduction

• OLED

• Structure of OLED

• Working principle of OLED

• Flexible OLED

• Advantages of Flexible displays

• Disadvantages of Flexible displays

• Concept devices

• Conclusion

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.

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.

STRUCTURE OF OLED

1. Cathode (-)

2. Emissive layer

3. Emission of Radiation

4. Conductive layer

5. Anode (+)

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.

FLEXIBLE OLED

A flexible OLED is a type of OLED

incorporating a flexible plastic

substrate on which the

electroluminescent organic

semiconductor is deposited.

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

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)

SAMSUNG YOUM

LG G FLEX

APPLE SMARTWATCH

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.

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