WHAT IS AN OLED?
An OLED is any light emitting diode in which organic layers are
responsible for light emission.
OLEDs are solid state devices composed of thin films of organic
molecules that is 100 to 500 nanometers thick.
They doesn’t require any backlight, i.e. they are self-emitting.
They are made from carbon and hydrogen.
The first OLED device was developed by Eastman Kodak in 1987.
In 1996, Pioneer produced the world’s first commercial PMOLED.
In 2000, many companies like Motorola, LG etc developed various
In 2001, Sony developed world’s largest full color OLED.
In 2010 & 2011, many companies announced AMOLED displays.
Emissive Layer : Transports electrons from
Cathode Layer : Injection of electrons when
current flows through.
Substrate Layer : Thin sheet of glass with a
transparent conductive layer. It supports OLED
Anode Layer : Active layer & removes
electrons. Electrons are replaced by electron
Conductive Layer : Hole transport layer.
Transports hole from anode layer.
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 combines and light emits.
ADVANTAGES OF OLED
Very thin panel of approximately 1mm.
Low power consumption.
High contrast ratio of 10000:1
Wide viewing angle of 170 degree.
Foldable display panel.
Faster response time.