AMOLED & OLED TECHNOLOGY

AMOLED & OLED TECHNOLOGY

PRESENTED BYV.V.SIVA KUMARREG NO:08R81A04C7IV YEAR-ECE1CONTENTSINTRODUCTION.WHAT IS OLED?WHAT IS AMOLED?STRUCTURE OF OLED.DIFFERENCE B/W AMOLED & PMOLED.WORKING OF OLED.APPLICATIONS.ADVANTAGES.DRAWBACKSFUTURE SCOPE.CONCLUSION.

2INTRODUCTIONFirst developed in the early 1950 s in france.

The first OLED products in the market used PMOLEDs - these were MP3 players, sub-displays on cell phones and radio decks for automobiles.

When AMOLED panels started to emerge in 2007 and 2008 we have seen these larger displays in mobile video players, digital cameras, mobile phones main displays and evenOLED TVs.3What is OLED?Anorganic light emitting diode(OLED) is alight emitting diode(LED) in which the emissive electroluminescentlayer is a film oforganic compoundsthat emits light when an electric current passes through it.

This layer oforganic semiconductor material is formed between two electrodes. Generally, at least one of these electrodes is transparent.

There are two types of OLED s are generally used.. they are (a) AMOLED (b) PMOLED

4What is AMOLED? Active-matrix OLED(Active-matrix organic light-emitting diodeorAMOLED) is a display technology for use in mobile devices and televisions.

OLEDdescribes a specific type of thin display technology which doesn't require abacklight, andActive-Matrixrefers to the technology behind the addressing of pixels.

AMOLED technology continues to make progress towards low-power and low-cost large size (e.g. 40-inch) for applications such as TV.

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OLED DISPLAY 6

Substrate (clear plastic, glass, foil)

Anode (transparent)

Organic layer: Conducting layerEmissive layer

Cathode (may or may not be transparent depending on the type of OLED)

Structure of OLED:7Difference between AMOLED & PMOLED:AMOLED means Active matrix organic light emitting diode.

AMOLEDs have a different driver electronics - each pixel is controlled directly.

AMOLEDs are more expensive, and much more difficult to create, but can be used for larger displays (current prototypes are up to 40") and are very power efficient.

PMOLED means Passive matrix organic light emitting diode.

Passive-Matrix OLEDs, the display is controlled by switching on rows and columns.

PMOLEDs are very easy and cheap to build, but they are limited to small sizes. The image displaying is a bit complicated. Also the power consumption is not as good as AMOLEDs. AMOLEDPMOLED8HOW OLED WORKS?OLEDs emit light in a similar manner to LEDs, through a process calledelectro-phosphorescence.Thebatteryor power supply of the device containing the OLED applies a voltage across the OLED.An electrical current flows from the cathode to the anode through the organic layers (an electrical current is a flow of electrons).The cathode gives electrons to the emissive layer of organic molecules.The anode removes electrons from the conductive layer of organic molecules. (This is the equivalent to giving electron holes to the conductive layer.)At the boundary between the emissive and the conductive layers, electrons find electron holes.When an electron finds an electron hole, the electron fills the hole.When this happens, the electron gives up energy in the form of a photon of light .

9APPLICATIONS:TVsCell Phone screens Computer ScreensKeyboards LightsPortable Device displays

10ADVANTAGES:Low power

Low cost

Thin, lightweight

Superior image quality

Wide-viewing angle

Rollable Display

11DRAWBACKS:Lifespan

Water damage

Manufacturing Cost

12Future Uses for OLED:LightingFlexible / bendable lightings.Transparent lighting doubles as a window Cell PhonesNokia 888Samsung

13QUERIES ?14THANK "U"15