Presented by:
Praveen Sheri 4JE10EC424
VIII- Sem ECE
Under Guidence of:
Prof. A Thyagaraja Murthy
Associate Professor
DEPARTMENT OF ELECTRONICS& COMMUNICATION ENGINEERING
SRI JAYACHAMARAJENDRA COLLEGE OF ENGINEERING
Mysore-57001

OLED - Organic Light Emitting
Diode
An OLED is a light emitting
diode (LED) which emissive
electroluminescent layer is
composed of a film of organic
compounds.

• First developed in the early 1950s in
France.
• 1960s-AC-driven electroluminescent cells using
doped anthracene was developed.
• In 1987 Chin Tang and Van Slyke introduced
the first light emitting diodes from thin organic
layers.
• In1990 electroluminescence in polymers was
discovered.

 SUBSTRATE.
 ANODE
 ORGANIC LAYER:
1-Conductive layer
2-Emmisive layer
 CATHODE.

• The organic layer is between cathode
& anode run perpendicular.
• The intersections
form the pixels.
• Easy to make.
• Use more power.
• Best for small screens.

• Substrate (clear plastic, glass, foil) - The substrate supports the OLED.
• Anode (transparent) - The anode removes electrons (adds
electron "holes") when a current flows through the device.
• Organic layer:
o Conducting layer-This layer is ma-de of organic
plastic molecules that transport "holes" from the
anode. One conducting polymer used in OLEDs
is polyaniline.
o Emissive layer - This layer is made of organic
plastic molecules (different ones from the
conducting layer) that transport electrons from
the cathode; this is where light is made. One
polymer used in the emissive layer is
polyfluorene.
• Cathode (may or may not be transparent depending on the type of OLED) - The cathode
injects electrons when a current flows through the device.

• Televisions
• SONY
• LG transparent TV
• Cell Phone screens
• Wrist Watch
• Computer Screens
• Laptops
• Desktops
• Bendable Devices
• Portable Device displays
• Philips Go Gear MP3 Player

• Faster response time than LCDs
• Consume significantly less energy
• Can be transparent when off
• Flexible and Conformal Displays
• Thinner display-No backlight required
• Better contrast ratio
• Safer for the environment
• Wider viewing angles; up to 170 degrees
• OLEDs refresh almost 1,000 times faster then LCDs
• Low cost materials and fabrication method
• Less Expensive than LCD due to lesser components
• Can be made using plastic screens; LCDs require glass
backing

OLED seems to be the perfect technology for all
types of displays, but it also has some problems:
• Lifetime - While 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 - Currently, manufacturing is
more expensive than LCDs
• Water - Water can easily damage OLEDs
• OLED screens are even worse than LCD in direct
sunlight
• Overall luminance degradation
• Limited market availability

 Manufacturers focusing on
finding a cheap way to
produce.
 "Roll-to-Roll"
Manufacturing.
 Increasing efficiency of
blue luminance.
 Boosting overall lifespan

 Data glass
 GPS system
 OLED – in future cars
 Curved OLED displays, placed on non-flat surfaces
 And many more we cannot even imagine today
Scroll Laptop
• Nokia concept OLED Laptop

REFERENCES
 Lahey, Byron, et al. "PaperPhone: understanding the use of bend
gestures in mobile devices with flexible electronic paper displays",
Proceedings of the SIGCHI Conference on Human Factors in
Computing Systems. ACM, pp 1303-1312, 2011
 Warren, Kristen, et al. "Bending the rules: bend gesture classification
for flexible displays."
 Proceedings of the SIGCHI Conference on Human Factors in
Computing Systems. ACM, PP

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