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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有機發光二極體Organic Light-Emitting Diodes
講師 : 侯政杰2014/05/09
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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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Motivation
41 in Samsung Prototype
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How OLED Works
• Cathode
• Emissive Layer
• Conductive Layer
• Anode
• Substrate
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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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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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Types of OLEDs
• Passive-matrix OLED
• Active-matrix OLED
• Transparent OLED
• Top-emitting OLED
• Flexible OLED
• White OLED
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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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• 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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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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Top-emitting OLEDTEOLED
• Non-transparent or reflective substrate
• Transparent Cathode
• Used with Active Matrix Device
• Smart card displays
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Flexible OLED
• Flexible metalic foil or plastic substrate
• Lightweight and durable
• Reduce display breaking
• Clothing OLED
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White OLED
• Emits bright white light
• Replace fluorescent lights
• Reduce energy cost for lighting
• True Color Qualities
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White OLED
Cellphone backlight white OLED vs standard LED from Organic Lighting Technologies LLC
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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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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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Flexible OLEDs
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Flexible OLEDs
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OLED lighting
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OLED lighting
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OLED TV
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Transparent OLEDs
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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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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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The World’s First >100” OLED Display is Passive Matrix
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New AMOLED Products in the Market - Small Size
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New AMOLED Products in the Market - Medium/Large Size
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iPhone 4 vs. Samsung Galaxy S
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AM OLED vs. AM LCD
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Obstacles and Solutions for OLED TV
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OLED Displays Shipment Share
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AMOLED Supply and Demand
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Past 11 years
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Past 11 years
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Long-Term Annual Revenue Forecast
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AMOLED Entrance into Medium/Large Applications
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Market Drivers for OLED Lighting
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OLED Display and Lighting Differences
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OLED Lighting: Opportunity is Evolving
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OLED Lighting Market Forecast
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Summary and Business Recommendations
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