Skip to main content Accessibility help
×
Home

Analysis of high-power packages for white-light-emitting diode lamps with remote phosphor

  • Hong Luo (a1), Jong Kyu Kim (a2), Yangang Xi (a3), E. Fred Schubert (a4), Jaehee Cho (a5), Cheolsoo Sone (a6) and Yongjo Park (a7)...

Abstract

An optimized packaging configuration for high-power white-light-emitting diode (LED) lamps that employs a diffuse reflector cup, a remote phosphor and a hemi-spherically-shaped encapsulation is presented. Ray tracing simulations for this configuration show that the phosphor efficiency can be enhanced by up to 50% over conventional packages. It is experimentally shown that dichromatic LED lamps with remote phosphor and diffuse reflector cup configuration have higher phosphor efficiency by 15.4% for blue-pumped yellow phosphor and by 27% for ultraviolet-pumped blue phosphor over conventional packages. Those improvements are attributed to reduced absorption of the phosphorescence by the LED chip and the reduction of deterministic optical modes trapped inside the encapsulant.

Copyright

References

Hide All
1. Steranka, F. M., Bhat, J., Collins, D., Cook, L., Craford, M. G., Fletcher, R., Gardner, N., Grillot, P., Keuper, M., Khare, R., Kim, A., Krames, M., Harbers, G., Ludowise, M., Martin, P.S., Misra, M., Mueller, G., Mueller-Mach, R., Rudaz, S., Shen, Y.-C., Steigerwald, D., Stockman, S., Subramanya, S., Trottier, T., and Wierer, J.J., Phys. Status. Solidi A 194, 380 (2002).
2. Steigerwald, D. A., Bhat, J. C., Collins, D., Fletcher, R. M., Holcomb, M. W., Ludowise, M. J., Martin, P. S., and Rudaz, S. L., IEEE Journal on Selected Topics in Quantum Electronics 8, 310 (2002).
3. Mueller-Mach, R., Mueller, G., Krames, M., and Trottier, T., IEEE Journal on Selected Topics in Quantum Electronics 8, 339 (2002).
4. Kim, J. K., Luo, H., Schubert, E. F., Cho, J., Sone, C., and Park, Y., Japan. J. Appl. Phys. 44, L649 (2005)
5. Narendran, N., Narendran, N., Gu, Y., Freyssinier-Nova, J. P., and Zhu, Y., Phys. Status Solidi A 202, R60 (2005).
6. Goetz, W., 5th International Conference on Nitride Semiconductor, ICNS-5, Nara, Japan, May 25–30 (2003).
7. Kim, Jong Kyu, Gessmann, Thomas, Luo, Hong, and Fred Schubert, E., Appl. Phys. Lett. 84, 4508 (2004).

Keywords

Analysis of high-power packages for white-light-emitting diode lamps with remote phosphor

  • Hong Luo (a1), Jong Kyu Kim (a2), Yangang Xi (a3), E. Fred Schubert (a4), Jaehee Cho (a5), Cheolsoo Sone (a6) and Yongjo Park (a7)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed