LED 원리 및 Technology

소개

LED 원리 및 Technology에 관한 프레젠테이션

목차

Light-Emitting Diodes(LEDs)
Outlines
Introduction
- Historical view
- LED Applications
LED Principles
LED Materials
Evaluation factors for LEDs
High Efficiency LED structure
-AlInGaP Material system
-AlInGaN Material system
Conclusions

본문내용

Emerging solid-state lighting technology
- rapid development in efficiency, available emission spectrum, higher power and speed
- ruggedness, low-voltage operation, high reliability, low cost
LEDs into wide range of applications
- telecommunications, solid-state lighting, display…
Visible-spectrum LEDs replace conventional lighting technologies
- > 100lm/W
- AlGaInP & AlInGaN Material system
LED’s Perspectives
1. LED’s have clear advantages and utilization is increasing in applications requiring colored lighting
2. LED’s will be increasingly utilized for low power white lighting applications as the technology evolves
3. LED lamps will be far more expensive than incandescent, halogen or fluorescent lamps
for at least a decade.
4. The expensive LED lamp must pay for itself through lifetime energy and maintenance savings.

참고자료

· 1) J.Y.Tsao, IEEE Circuits & Devices Magazine May/June(2004) 28
· 2) E.F.Schubert, Light-Emitting Diodes (2002) Ch.5~7
· 3) S.M.Sze, Physics of Semiconductor Devices(1981) Ch.12
· 4) K.Streubel et.al., IEEE J. On Selected Topics in QE vol.8(2002) 321
· 5) Th. Gessmann et.al., APL. Vol.95(2004) 2203
· 6) T.Mukai, IEEE J. On Selected Topics in QE vol.8(2002) 264
· 7) J.J.Wierer et al., APL vol.78(2001) 3379
· 8) C-F.Chu et al., JAP vol.95(2004) 3916
· 9) W.S.Wong et al., APL vol.77(2000) 2822
· 10) T.Fujii et al., APL vol.84(2004) 855