LED 분석(영문)

목차

1. History
2. Principle
3. Structure
4. Ad&Disad
5. Application
6. Prospect
7. Q&A

본문내용

History
In 1907 H.J. Round found photo emission phenomena
In 1923 found injection luminescence from SiC
In1962 GE developed semiconductor LED
-> Red color LED become commercialized by GaAsP
In 1970s developed all color of LED except blue color
In the middle of 1990s developed blue color LED in Japan
->All natural color developed
In 2000s
-White LED be used widely
-Energy cut down remarkably
-semi-permanence
-brightness changed so can use widely in industry

익사이테이션과 재결합은 LED의 주요 원리입니다.
Excitation and recombination are major principle of LED.

참고 자료

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