O.L.E.DO.L.E.D

(Organic(Organic LightLight Emitting Diode)Emitting Diode)

Presented by: Harsh Veer Singh Presented by: Harsh Veer Singh NirwanNirwan

88thth-sem ECE-sem ECE

☺ ☺

What is an OLED ?What is an OLED ?

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.

HISTORYHISTORY• 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. 

ARCHITECTURE OF OLEDARCHITECTURE OF OLED• SUBSTRATE.

• ANODE

• ORGANIC LAYER: 1-Conductive layer 2-Emmisive layer

• CATHODE.

TYPES OF OLEDTYPES OF OLEDPassive OLEDs• The organic layer is between cathode

& anode run perpendicular.

• The intersections form the pixels.

• Easy to make.

• Use more power.

• Best for small screens.

Active OLEDs• Full layers of cathode and

anode.

• Anode over lays a thin film transistor (TFT).

• Requires less power.

• Higher refresh rates.

• Suitable for large screens

APPLICATION OF OLEDAPPLICATION OF OLED• Televisions

• SONY• LG transparent TV

• Cell Phone screens

• Wrist Watch• Computer Screens

• Laptops• Desktops

• Bendable Devices• Portable Device displays

• Philips Go Gear MP3 Player

ADVANTAGESADVANTAGES

• 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

DISADVANTAGESDISADVANTAGES 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

FUTURE USES FOR OLEDFUTURE USES FOR OLED Manufacturers focusing on

finding a cheap way to produce.

"Roll-to-Roll" Manufacturing.

Increasing efficiency of blue luminance.

  Boosting overall lifespan

FUTURE USES FOR OLEDFUTURE USES FOR OLED 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

THANK YOUTHANK YOUFOR FOR

YOUR PATIENCEYOUR PATIENCE☺ ☺

• Electroluminescence (EL) is an optical phenomenon and electrical phenomenon in which a material emits light in response to an electric current passed through it, or to a strong electric field

• A pixel (or picture element) is the smallest item of information in an image

A thin-film transistor (TFT) is a special kind of field-effect transistor made by depositing thin films of a semiconductor active layer.

The refresh rate is the number of times in a second that display hardware draws the data it is being given

SONY XEL-1SONY XEL-1

The SONY XEL-1 released in December 2007 for customers in Japan. 200,000 Yen -- or about $1,700 U.S (Rs 8L+)• Released XEL-1 in February 2009.(Worldwide) • $2500 USD(Rs 12L+)• First OLED TV sold in sold in America..• 11'' screen, 3mm thin• Weighs approximately 1.9 kg • Wide 178 degree viewing angle• 1,000,000:1 Contrast ratio

The Sony.11-inch XEL-1 OLED TV

TVs almost as thin as a credit card

L.GL.G

Flexible OLED

LG Display 19-inch OLED

Samsung's 40-inch OLED TV

ROLL TO ROLL PRINTINGROLL TO ROLL PRINTING

•The flexible OLED element capable of being produced using roll-to-roll printing technology.•The ROLLED project under European researchers coordinated by VTT.

FAST RESPONSE TIMEFAST RESPONSE TIME

OLED LCD

Fast response time means full motion graphics can be time means full motion graphics can be displayeddisplayed

CONSTANT CONTRAST RATIOCONSTANT CONTRAST RATIO

• Wide viewing angle.

SONY PSP2 CONCEPTSONY PSP2 CONCEPT

• Oled rollable display.

A flexible OLED display that can be rolled around the main electronics core but, when charged, automatically stiffens with minimal bezel surround.

BENDABLE OLED DISPLAYBENDABLE OLED DISPLAY

Organic Light Emitting Diode (OLED) technology is threatening the Liquid Crystal Display, or LCD, standard because of its flexibility, low power consumption and versatility.

OLED DATA GLASSOLED DATA GLASS

Developed by Students at the Fraunhofer Institute in Germany A pair of interactive data eyeglasses that can project an image onto the retina from an organic light-emitting diode (OLED) micro- display, making the image appear as if it's a meter in front of the wearer. Similar headwear only throws up a static image, Just the movement of the eyeball, to scroll through information.

IN DIRECT SUNLIGHTIN DIRECT SUNLIGHT

Nokia N00 OLED Display Apple iPHONE LCD Display

WRIST WATCHWRIST WATCH