Introductino of Phosphors (형광체)
- 최초 등록일
- 2011.10.28
- 최종 저작일
- 2010.11
- 13페이지/
MS 파워포인트
- 가격 1,000원
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형광체의 전반적인 이해
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본문내용
In the US, 22% of electricity is consumed for lighting. This costs about $50 billion per year.
High efficiency (>50%) solid-state lighting devices could save up to $42 billion per year.
GaAsP, AlGaAs
Indicator
Material Quality
Sub-candela Brightness
InGaN, AlGaInP
Full Color Display
Material Quality
Candela Brightness
InGaN, AlGaInP
Mobile, LCD BLU, Auto
Efficiency, Integration
120 lm/W
InGaN, AlGaInP
Digital Lighting
Efficiency, Cost
200 lm/W
LEDs are made from inorganic semiconductors.
They contain a p-doped and an n-doped layer.
Application of an electrical bias produces holes (+) and electrons (-).
Recombination of electrons and holes produces light.
Monochromatic light emitted.
Phosphors can be used to create white light.
Blue LEDs are used. Some blue light escapes.
Some blue light is captured by a phosphor and is down-converted to yellow.
The combined blue and yellow emission appears to be white.
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