Organic Light Organic Light Emitting DiodesEmitting DiodesPresentad by: Mydul IslamPresentad by: Mydul Islam

What is an OLED?An OLED is an electronic device made by placing a series of organic thin An OLED is an electronic device made by placing a series of organic thin films between two conductors. When electrical current is applied, a bright films between two conductors. When electrical current is applied, a bright light is emitted.light is emitted.

LED Monitor OLED MonitorLED Monitor OLED Monitor

The OLED Structure

How OLEDs Emit Light• Supply: Battery or Power. Supply: Battery or Power.

Applies a voltage across the Applies a voltage across the OLED.OLED.

• Current flows: Cathode to the Current flows: Cathode to the anode through the organic layers.anode through the organic layers.

• Boundary between the emissive Boundary between the emissive and the conductive layersand the conductive layers

• Electrons find electron holes.Electrons find electron holes.

• The OLED emits light.The OLED emits light.

Types of OLEDs• Passive-matrixPassive-matrix

• Active-matrixActive-matrix

• TransparentTransparent

• Top-emittingTop-emitting

•FlexibleFlexible

•WhiteWhite

Advantages• Thinner, lighter and more flexibleThinner, lighter and more flexible

• BrighterBrighter

• Consume much less powerConsume much less power

• Easier to produce and make into larger sizesEasier to produce and make into larger sizes

• Large field of viewLarge field of view

Disadvantages• LifetimeLifetime

• ManufacturingManufacturing

• WaterWater

OLED/LED: What’s the diff?

• Both OLED and LED use the same principle of Both OLED and LED use the same principle of electroluminescence- the optical and electrical phenomenon where electroluminescence- the optical and electrical phenomenon where certain materials emit light in response to an electric current certain materials emit light in response to an electric current passing through it.passing through it.

• OLEDOLED– Lighter weightLighter weight– Perform at lower efficienciesPerform at lower efficiencies– Less power consumptionLess power consumption– Organic based chemicalsOrganic based chemicals

OLED’s Today• Various Mp3 playersVarious Mp3 players

– Muzio JM-200 Muzio JM-200 – Sony NW-E015F Walkman Sony NW-E015F Walkman – Arcos 204Arcos 204

• Kodak’s LS633 3mpx digital camera Kodak’s LS633 3mpx digital camera – Priced at 399$ Priced at 399$ – Good battery life Good battery life – 2.2” OLED screen 2.2” OLED screen – Mobile devicesMobile devices

– Apple iPhoneApple iPhone– Sony Ericsson W51S Sony Ericsson W51S

Future of OLEDs?

Companies

• Samsungs 17 inch AMOLED Samsungs 17 inch AMOLED displaydisplay– 12mm thick12mm thick– 1600x1200 aspect ratio1600x1200 aspect ratio

• Sony intends to give OLED Sony intends to give OLED technology a shot in 2008, technology a shot in 2008, making OLED TV’s.making OLED TV’s.

• Toshiba is holding off until 2015-Toshiba is holding off until 2015-20162016

Prototypes

Referance• http://ezinearticles.com/?OLED-Lighting-and-LED-Lighting:--The-

Difference-between-LED-and-OLED&id=460933

• http://en.wikipedia.org/wiki/Oled

• http://www.universaldisplay.com/index.html

• http://www.oled-info.com/oledTV

• http://www.youtube.com/watch?v=3Ufs9Wx0VXQ