epileds 有機發光二極體 organic light-emitting diodes 講師 : 侯政杰 2014/05/09
TRANSCRIPT
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EPILEDS
有機發光二極體Organic Light-Emitting Diodes
講師 : 侯政杰2014/05/09
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EPILEDS
Outline
Organic Light-Emitting Diodes Motivation How OLED works Types of OLEDs Advantages and Challenges Current and Future Applications
OLED Display and OLED Lighting Technology and Market Forecast OLED Display New OLED Display Products Technology Challenges and New Progress OLED Suppliers and New Fab Activities Past 11 Years Future 7 YearsOLED Lighting Market Drivers OLED Lighting Challenges OLED Lighting Market Forecast
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EPILEDS
Motivation
41 in Samsung Prototype
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EPILEDS
How OLED Works
• Cathode
• Emissive Layer
• Conductive Layer
• Anode
• Substrate
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EPILEDS
How OLED Works
1. Voltage applied across Cathode and Anode
1. Typically 2V-10V
2. Current flows from cathode to anode
1. Electrons flow to emissive layer
2. Electrons removed from conductive layer leaving holes
3. Holes jump into emissive layer
3. Electron and hole combine and light emitted
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EPILEDS
How OLED Works
• Different Colors – type of organic molecule
in the emissive layer – 3 molecules used -RGB
• Intensity/brightness– amount of current
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EPILEDS
Types of OLEDs
• Passive-matrix OLED
• Active-matrix OLED
• Transparent OLED
• Top-emitting OLED
• Flexible OLED
• White OLED
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EPILEDS
Passive-Matrix OLED (PMOLED)
• Perpendicular cathode/anode strip orientation
• Light emitted at intersection (pixels)
• External circuitry– Turns on/off pixels
• External circuitry• Large power consumption
– Used on 1-3 inch screens– Alphanumeric displays
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EPILEDS
• Full layers of cathode, anode, organic molecules
• Thin Film Transistor matrix (TFT) on top of anode– Internal circuitry to
determine which pixels to turn on/off
• Less power consumed then PMOLED– Used for larger displays
Active-Matrix OLED (AMOLED)
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EPILEDS
Transparent OLEDTOLED
• Transparent substrate, cathode and anode
• Bi-direction light emission
• Passive or Active Matrix OLED
• Useful for heads-up display– Transparent projector
screen– glasses
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EPILEDS
Top-emitting OLEDTEOLED
• Non-transparent or reflective substrate
• Transparent Cathode
• Used with Active Matrix Device
• Smart card displays
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EPILEDS
Flexible OLED
• Flexible metalic foil or plastic substrate
• Lightweight and durable
• Reduce display breaking
• Clothing OLED
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EPILEDS
White OLED
• Emits bright white light
• Replace fluorescent lights
• Reduce energy cost for lighting
• True Color Qualities
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EPILEDS
White OLED
Cellphone backlight white OLED vs standard LED from Organic Lighting Technologies LLC
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EPILEDS
OLED Advantages over LED and LCD
• Thinner, lighter and more flexible• Plastic substrates rather then glass• High resolution (<5um pixel size) and fast
switching (1-10um)• Do not require backlight, light generated• Low voltage, low power and emissive source• Robust Design (Plastic Substrate)• Larger sized displays• Brighter- good daylight visibility• Larger viewing angles -170o
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EPILEDS
OLED Disadvantages
• Lifetime– White, Red, Green 46,000-230,000 hours
• About 5-25 years
– Blue 14,000 hours• About 1.6 years
• Expensive
• Susceptible to water
• Overcome multi-billion dollar LCD market
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EPILEDS
Flexible OLEDs
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EPILEDS
Flexible OLEDs
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EPILEDS
OLED lighting
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EPILEDS
OLED lighting
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EPILEDS
OLED TV
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EPILEDS
Transparent OLEDs
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EPILEDS
有機發光二極體之顯示與照明技術及產業發展
OLED Display and OLED LightingTechnology and Market Forecast
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EPILEDS
OLED Display
New OLED Display Products
Technology Challenges and New Progress
OLED Suppliers and New Fab Activities
Past 11 Years
Future 7 Years
OLED Lighting
Market Drivers
OLED Lighting Challenges
OLED Lighting Market Forecast
Summary and Strategies
Outline
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EPILEDS
The World’s First >100” OLED Display is Passive Matrix
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EPILEDS
New AMOLED Products in the Market - Small Size
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EPILEDS
New AMOLED Products in the Market - Medium/Large Size
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EPILEDS
iPhone 4 vs. Samsung Galaxy S
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EPILEDS
AM OLED vs. AM LCD
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EPILEDS
Obstacles and Solutions for OLED TV
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EPILEDS
OLED Displays Shipment Share
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EPILEDS
AMOLED Supply and Demand
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EPILEDS
Past 11 years
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EPILEDS
Past 11 years
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EPILEDS
Long-Term Annual Revenue Forecast
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EPILEDS
AMOLED Entrance into Medium/Large Applications
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EPILEDS
Market Drivers for OLED Lighting
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EPILEDS
OLED Display and Lighting Differences
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EPILEDS
OLED Lighting: Opportunity is Evolving
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EPILEDS
OLED Lighting Market Forecast
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EPILEDS
Summary and Business Recommendations
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EPILEDS
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EPILEDS
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EPILEDS
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EPILEDS