project on solar mobile charger electronics project amd electrical project on using arduino

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Submitted By: Under Guidance of:
G. Rajashekar Ms. Farheen Sulthana
20C35A0411 Assistant Professor
ECE Department ECE Department
DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING
TECHNICAL SEMINAR
ON
OLED Technology

2. • Abstract
• Introduction
• What is an OLED
• Features
• Structure of OLED
• Working Principle
• Types of OLED
• Advantages
• Applications
• Conclusion
CONTENTS:
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OLED is a display device that sandwiches carbon based films of organic
molecules that is 100 to 500 nanometres thick between the two electrodes and
when voltage is applied creates light.
OLED doesn't require any backlight. i.e., they are self-emitting.
OLEDs are made from carbon and hydrogen.
As the OLEDs are made of organic compounds, they are called as Organic
Light Emitting Diode.
 OLEDs have dynamic power consumption when displaying different images.
The power consumption of the OLED panel is only dependent on the pixels that
are lit in the images.
Abstract

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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.

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WHAT IS AN OLED?
OLEDs are solid state devices composed of thin films of
organic molecules that is 100 to 500 nano meters 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.

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

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SRUCTURE OF OLED
 Substrate.
 Anode.
 Organic layer.
-Conductive layer (Hole Transport Layer).
made up of polyaniline or metal-phthalocyanine. -
Emissive layer( Electron Transport Layer).
made up of polyfluorene or metal chelates.
 Cathode.

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SRRUCTURE OF OLED(FIGURE)

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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.

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WORKING
PRINCIPLE(FIGURE)

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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).

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1.Passive matrix OLED (PMOLED). 2.Active matrix OLED(AMOLED). 3.Transparent OLED(TOLED).
4.Top emitting OLED. 5.Flexible OLED(FOLED). 6.White OLED(WOLED).

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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.

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APPLICATIONS
Major applications of OLED technology are
 OLED TV.
 Mobile phones with OLED screens.
 Rolltop Laptop.

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CONCLUSION
 Organic Light Emitting Diodes are evolving as the next generation
displays.
 High power consumption
 Limited viewing angles
 Poor contrast ratios.

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