OLED OLED TECHNOLOGY TECHNOLOGY
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OLED OLED TECHNOLOGYTECHNOLOGY
CONTENTSCONTENTS……
What is an OLED?What is an OLED? How It Works?How It Works? Types of OLEDsTypes of OLEDs OLED OLED vsvs. Plasma/LCD. Plasma/LCD Advantages of OLEDAdvantages of OLED AMOLED AMOLED
AMOLED AMOLED typestypes AMOLED AMOLED devices/applicationsdevices/applications
What is an OLED?What is an OLED?
An OLED is any light emitting diode (LED) in which emissive An OLED is any light emitting diode (LED) in which emissive electroluminescent layer is composed of a film of organic electroluminescent layer is composed of a film of organic compoundscompounds
OLED - Organic Light Emitting Diode
Demonstration of a flexible OLED device
How It Works?How It Works? Composed of two substrate layers on the Composed of two substrate layers on the
outsideoutside Emissive and conductive layer lie between Emissive and conductive layer lie between
the cathode and the anode layers the cathode and the anode layers A current is applied across the LED, A current is applied across the LED,
where electrons move from cathode to where electrons move from cathode to anode anode
The cathode gives electrons to the The cathode gives electrons to the emissive layer, where the anode withdraws emissive layer, where the anode withdraws these electrons from the conductive layerthese electrons from the conductive layer
The emissive layer becomes rich in The emissive layer becomes rich in negative charge while the conductive layer negative charge while the conductive layer becomes more positively charged becomes more positively charged
The two charges recombine in the The two charges recombine in the emissive layer, creating a drop in energy emissive layer, creating a drop in energy levels of the electronslevels of the electrons
The drop in energy levels results in The drop in energy levels results in radiation that is on the visible spectrum, radiation that is on the visible spectrum, emitting light emitting light
Types of OLEDsTypes of OLEDs
Passive-matrix OLEDPassive-matrix OLED Active-matrix OLEDActive-matrix OLED Transparent OLEDTransparent OLED Top-emitting OLEDTop-emitting OLED Foldable OLEDFoldable OLED White OLEDWhite OLED
As OLEDs emit light, they can be used to make lighting panels - these will be thin, efficient, and potential transparent too. Your window can become a lamp at night
OLEDs can also be used to make white lighting panels. OLEDs provide great area lighting, and a curved or flexible
OLED will enable a wide range of beautiful lamp designs.
Types of OLED’STypes of OLED’SPassive OLEDsPassive OLEDs
• The organic layer is The organic layer is between strips of between strips of cathode and anode that cathode and anode that run perpendicularrun perpendicular
• The intersections form The intersections form the pixelsthe pixels
• Easy to makeEasy to make• Use more powerUse more power• Best for small screens Best for small screens
Active OLEDsActive OLEDs• Full layers of cathode Full layers of cathode
and anodeand anode• Anode over lays a thin Anode over lays a thin
film transistor (TFT)film transistor (TFT)• Requires less powerRequires less power• Higher refresh ratesHigher refresh rates• Suitable for large Suitable for large
screensscreens
ADVANTAGESADVANTAGESOLED OLED vsvs. Plasma/LCD. Plasma/LCD
• Much faster response timeMuch faster response time• Consume significantly less Consume significantly less
energy energy • Able to display "True Black" Able to display "True Black"
picture picture • Wider viewing anglesWider viewing angles• Thinner displayThinner display• Better contrast ratioBetter contrast ratio• Safer for the environmentSafer for the environment• Has potential to be mass Has potential to be mass
produced inexpensivelyproduced inexpensively• OLED’s refresh almost OLED’s refresh almost
1,000 times faster then 1,000 times faster then LCDsLCDs
ContinuedContinued…… DISADVANTAGESDISADVANTAGES
•Cost to manufacture is high
•Overall luminance degradation
•Constraints with lifespan •Easily damaged by water
•Limited market availability
• expensive compared to lcd/led display
AMOLEDAMOLED ((active-matrix organic light-emitting diodeactive-matrix organic light-emitting diode))
AMOLEDAMOLED
is a display technology for use in mobile devices and televisions
active matrix refers to the technology behind the addressing of pixels.
AMOLED technology is used in mobile phones, media players and digital cameras
When you display an image, you actually display it line by line (sequentially) as you can only change one line at a time. An AMOLED uses a TFT which contains a storage capacitor which maintains the line pixel states, and so
enables large size (and large resolution) displays.
Magnified image of the AMOLED screen
AMOLED AMOLED typestypes Super AMOLEDSuper AMOLED is the original display which added an integrated touch-layer is the original display which added an integrated touch-layer
to the classic AMOLED display. This results in a thinner display that behaves to the classic AMOLED display. This results in a thinner display that behaves much better under sunlight. Super AMOLED uses PenTile technologymuch better under sunlight. Super AMOLED uses PenTile technology
Super AMOLED PlusSuper AMOLED Plus is Samsung's more advanced technology - which is Samsung's more advanced technology - which ditches the PenTile in favor of the classic RGB Stripe matrix. So while the ditches the PenTile in favor of the classic RGB Stripe matrix. So while the displays look better, they provide less pixel density compared to Super displays look better, they provide less pixel density compared to Super AMOLED displays.AMOLED displays.
Super AMOLED HDSuper AMOLED HD is the HD version of the Super AMOLED displays - is the HD version of the Super AMOLED displays - there's no technology difference, but Samsung uses this brand (they there's no technology difference, but Samsung uses this brand (they sometimes call it HD Super AMOLED) to make sure we know that the sometimes call it HD Super AMOLED) to make sure we know that the resolution is HD (1280x720, or 720p).resolution is HD (1280x720, or 720p).
Samsung Galaxy nexus and Galaxy s3 uses Super AMOLED with Pentile Samsung Galaxy nexus and Galaxy s3 uses Super AMOLED with Pentile RGBG matrix(2 sub pixels/pixel) and Galaxy note2 uses RGB(3 sub RGBG matrix(2 sub pixels/pixel) and Galaxy note2 uses RGB(3 sub pixels/pixel)pixels/pixel)
AMOLED AMOLED devicesdevices Samsung Galaxy NoteSamsung Galaxy Note (HD Super AMOLED) (HD Super AMOLED) Samsung Galaxy SSamsung Galaxy S (Super AMOLED) (Super AMOLED) Samsung Galaxy S AdvanceSamsung Galaxy S Advance (Super AMOLED) (Super AMOLED) Samsung Galaxy S IISamsung Galaxy S II (Super AMOLED Plus) (Super AMOLED Plus) Samsung Galaxy S IIISamsung Galaxy S III (HD Super AMOLED) (HD Super AMOLED) Samsung Galaxy S PlusSamsung Galaxy S Plus (Super AMOLED) (Super AMOLED) Samsung Galaxy S Blaze 4GSamsung Galaxy S Blaze 4G (Super AMOLED) (Super AMOLED) Samsung Galaxy NexusSamsung Galaxy Nexus (HD Super AMOLED) (HD Super AMOLED) Samsung Droid ChargeSamsung Droid Charge (Super AMOLED Plus) (Super AMOLED Plus) Samsung Wave S8500Samsung Wave S8500 (Super AMOLED) (Super AMOLED) Samsung S8600 Wave IIISamsung S8600 Wave III (Super AMOLED) (Super AMOLED) Samsung FocusSamsung Focus (Super AMOLED) (Super AMOLED) Samsung Focus SSamsung Focus S (Super AMOLED Plus) (Super AMOLED Plus) Samsung Focus 2Samsung Focus 2 (Super AMOLED) (Super AMOLED) Samsung Omnia 7Samsung Omnia 7 (Super AMOLED) (Super AMOLED) Samsung Omnia WSamsung Omnia W (Super AMOLED) (Super AMOLED) Samsung Omnia MSamsung Omnia M (Super AMOLED) (Super AMOLED) Samsung Infuse 4G (SGH-i997)Samsung Infuse 4G (SGH-i997) (Super AMOLED Plus) (Super AMOLED Plus) Vertu Signature SVertu Signature S
Applications of OLED/AMOLEDApplications of OLED/AMOLED
• TVsTVs• Cell Phone screens Cell Phone screens • Computer ScreensComputer Screens• Keyboards (Optimus Maximus)Keyboards (Optimus Maximus)• LightsLights• Portable Device displaysPortable Device displays
AMOLED AMOLED typestypes
Super AMOLEDSuper AMOLED Super AMOLED Advanced
Super AMOLED PlusHD Super AMOLED
World’s first curved OLED tvWorld’s first curved OLED tv
Curved OLED mobileCurved OLED mobile
SourcesSources
http://ezinearticles.com/?OLED-Lighting-and-LED-Lighting:--http://ezinearticles.com/?OLED-Lighting-and-LED-Lighting:--The-Difference-between-LED-and-OLED&id=460933The-Difference-between-LED-and-OLED&id=460933
http://en.wikipedia.org/wiki/Oledhttp://en.wikipedia.org/wiki/Oled
http://www.universaldisplay.com/index.htmlhttp://www.universaldisplay.com/index.html
http://www.oled-info.com/oledTVhttp://www.oled-info.com/oledTV
http://www.youtube.com/watch?v=3Ufs9Wx0VXQhttp://www.youtube.com/watch?v=3Ufs9Wx0VXQ
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