Flexible OLED Display

A Technical Seminar on

By,Malla Bhargav (09E51A0450)

Under the Guidance of,Mrs S.V.Devika,M.Tech, (PhD), MIEEEAssociate professor

Introduction

This technology is mainly aimed at revolutionizing both displays (i.e. TV or Smartphone screens) and lighting. OLED stands for Organic Light Emitting Diode, but since the light-producing technology is lightweight and can be applied to bendable surfaces, the term is often used to reference to flexible displays.

The display technology that has been used in these flexible displays is FAMOLED (i.e., Flexible Active Matrix Organic Light Emitting Diode).

What is an OLED?

An OLED or Organic Light Emitting Diode is a light emitting device based on the principle of electroluminescence of organic crystals.

An OLED is a solid-state semiconductor device that is 100 to 500 nanometres thick or about 200 times smaller than a human hair.

Layers & Principle of Operation

Types of OLEDs

There are two types of OLEDs namely Passive Matrix Active Matrix

Differences b/w the Types

Passive Matrix Active Matrix

1. The organic layer is between cathode & anode run perpendicular

Full layers of cathode and anode

2. The intersections form the pixels. Anode over lays a thin film transistor

3. Suitable for 2-3’’ screens (cell phones, PDA, MP3)

Suitable for large displays (computer monitors, TVs)

4. Consumes more power, due to the power needed for external circuitry

Consumes less power, because TFTarray requires less power than external circuitry

5. Easy to produce Faster refresh rates sosuitable for video

More expensive

Brighter and sharper images

Comparision of Layers b/w OLED, LCD & FAMOLED

Revolutionary Features of FAMOLED

Flexibility

Ultra-lightweight, thin form

Durability

Cost-effective processing

Advantages & Disadvantages

Lower cost in the future

Light weight & flexible

plastic substrates

Wider viewing angles &

improved brightness

Better power efficiency

Response time

Poor outdoor performance

Screen burn-in

UV sensitivity

Less Lifetime

Expensive Manufacturing

Susceptible to water

Applications

Lighting: 1.Flexible / bendable 2.lighting• 3.Wallpaper lighting • 4.defining new ways to light a space• 5.Transparent lighting doubles as a

window • 6.Heads up display.

Cell Phones :• 1. Nokia 888• 2. Samsung Skin…etc

Organic Light Emitting Diodes are evolving as the next generation of light sources. Presently researchers have been going on to develop a 1.5 emitting device. This wavelength is of special interest for telecommunications as it is the low-loss wavelength for optical fiber communications. Organic full-color displays may eventually replace liquid crystal displays for use with lap top and even desktop computers. Researchers are going on this subject and it is sure that OLED will emerge as future solid state light source.

Conclusion

ThankYou