OLED Displays Presentation - Andreas Schrader · 2003-11-02 · Your Guide to: OLED Displays...

Your Guide to: OLED DisplaysOctober 28, 2003

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OLED Displays

Presented bySönke Dohrn

Your Guide to: OLED DisplaysOctober 28, 2003

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OverviewTechnology - wazzup!The Edge Ahead – Application AreasTimeline – “Event Horizon”

Proprietary Technology

Hot Stuff – Eye CandiesQuestions?!

Your Guide to: OLED DisplaysOctober 28, 2003

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TechnologyOrganic Light Emitting DiodesLight emittation based on fluorescenceCarbon-based designer molecules

PolythiophenePolyfluorenePolyphenylenevinylene

Your Guide to: OLED DisplaysOctober 28, 2003

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Getting them to glow...Polymer layer sandwitched between two electrodes

Thinner than 500 nm

Electrons in benzene rings are excited by an external voltage of 3 to 5 V.Upon returning to ground state, they radiate a soft bright lightLeave no trace of afterglowIlluminating power is comparable to a conventional 100 W light bulb.

Your Guide to: OLED DisplaysOctober 28, 2003

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MatrixPassive

Individual pixels get activated passivelyIllumination to row and column line

Brightness determined by amount of current flowingTechnically difficult to activate more than one million pixels (size of 8 inch display)

ActiveEvery light spot gets its own thin film transistor (TFT)Additional layer of polycrystalline silicon

Improving life spot's life span

Your Guide to: OLED DisplaysOctober 28, 2003

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Manufacturing ProcessCheap and simple

Production process similar to an Ink Jet printerBUT: Production rooms need to be air-tightLatest: Organic Vapor Phase Deposition (OVPD) by UDC

Displays require hermetic sealingIn use was thin classNow: flexible plastics

Whole new application possibilities

Your Guide to: OLED DisplaysOctober 28, 2003

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The Edge AheadOLED's have a simpler structurePolymers form solid coverNo more complex reorientation of lightMuch brighterNearly 180° viewing angle with 90% surface coveredRefresh rate (great for video) Not adversely affecting energy balance

Your Guide to: OLED DisplaysOctober 28, 2003

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ApplicationFlexible plastics enable rollable displaysWoven into clothingWalls and ceilings painted with OLED'sNo other technology can produce such thin and versatile light sources.

Your Guide to: OLED DisplaysOctober 28, 2003

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Timeline1985: First discovery by Ching Tang2005: Glass flat-panels will land2005 – 2008: Transition to plastic displays2009: Volume shipments of notebook displays2012: Market expected to reach $3 billion.

Your Guide to: OLED DisplaysOctober 28, 2003

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High Efficiency MaterialsElectrophosphorescence by United Display Corporation Use of both singlet and triplet excited statePotential of 100% efficiency

Your Guide to: OLED DisplaysOctober 28, 2003

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Proprietary UDC TechnologyTOLED's [@ www.universaldisplay.com/toled.php]

EmittingTop-onlyBottom-only emittingBoth (transparent)

Improves daylight readibility

Your Guide to: OLED DisplaysOctober 28, 2003

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Proprietary UDC TechnologySOLED's [@ www.universaldisplay.com/soled.php]

Stacking of red, green and blue subpixelsImproving display resolutionEnhances full-colour qualityOnly a third of space required

Useful for wireless web-applications

Your Guide to: OLED DisplaysOctober 28, 2003

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Major PlayersKodak just branded its OLEDs NuVue Display TechnologyDuPont recently launched Olight brandSiemens expert on surface efficiencyAll other major players are licensees of Kodak or Cambridge Display Technology

Your Guide to: OLED DisplaysOctober 28, 2003

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Hot StuffSony 10-inch notebook diplay

Your Guide to: OLED DisplaysOctober 28, 2003

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Hot StuffElectronic Newspaper by IBMKodak EasyShareOther:

Mobile phonesDigital cameras

Your Guide to: OLED DisplaysOctober 28, 2003

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OLED's

Thank you.

Your questions, please.