Color temperature tunable white light emitting diodes packaged with an omni-directional reflector

Jung-Chieh Su; Chun-Lin Lu

doi:10.1364/OE.17.021408

Abstract

This study proposed a correlated color temperature (CCT) tunable phosphor-converted white light emitting diode (LED) with an omni-directional reflector (ODR). Applying current to each individual InGaN based ultraviolet, purple and blue source LED chip of the white LED package, we can achieve the CCT tunability. The optimum color properties of the resulting white light are (0.3347, 0.3384), 5398 K, 81, 3137~8746 K for color coordinates, CCT, color rendering index (CRI) and CCT tuning range, respectively. Roughening the ODR substrate, we solve the non-uniformity color distribution caused by the reflectance of the ODR and positioning of source LED chips.

Full Article | PDF Article

OSA Recommended Articles

Excellent color rendering indexes of multi-package white LEDs

Ji Hye Oh, Su Ji Yang, Yeon-Goog Sung, and Y. R. Do
Opt. Express 20(18) 20276-20285 (2012)

Highly-efficient, tunable green, phosphor-converted LEDs using a long-pass dichroic filter and a series of orthosilicate phosphors for tri-color white LEDs

Ji Hye Oh, Jeong Rok Oh, Hoo Keun Park, Yeon-Goog Sung, and Young Rag Do
Opt. Express 20(S1) A1-A12 (2012)

Design and fabrication of white light emitting diodes with an omnidirectional reflector

Jung-Chieh Su, Chun-Lin Lu, and Cheng-Wei Chu
Appl. Opt. 48(26) 4942-4946 (2009)

References

View by:
Article Order
|
Year
|
Author
|
Publication

K. N. Hui, P. T. Lai, and H. W. Choi, “Spectral conversion with fluorescent microspheres for light emitting diodes,” Opt. Express 16(1), 13–18 ( 2008).
[Crossref] [PubMed]
S.-W. Chen, J.-C. Su, C.-L. Lu, S.-F. Song, and J.-H. Chen, “Phosphors-conversion white light LEDs with an omni-directional reflector,” in Photonics, Devices, and Systems IV (SPIE, 2008), pp. 71382D–71388.
K. Sakuma, K. Omichi, N. Kimura, M. Ohashi, D. Tanaka, N. Hirosaki, Y. Yamamoto, R.-J. Xie, and T. Suehiro, “Warm-white light-emitting diode with yellowish orange SiALON ceramic phosphor,” Opt. Lett. 29(17), 2001–2003 ( 2004).
[Crossref] [PubMed]
K. Man, and I. Ashdown, “Accurate colorimetric feedback for RGB LED clusters,” in Sixth International Conference on Solid State Lighting (SPIE, San Diego, CA, USA, 2006), pp. 633702–633708.
Lumileds, “Luxeon Product Binning and Labeling,” in Technical Datasheet AB21 (Lumileds Lighting LLC, San Jose, CA).
N. Narendran and Y. Gu, “Life of LED-Based White Light Sources,” J. Display Technol. 1(1), 167–171 ( 2005).
[Crossref]
I. Speier, and M. Salsbury, “Color temperature tunable white light LED system,” in Sixth International Conference on Solid State Lighting (SPIE, San Diego, CA, USA, 2006), pp. 63371F–63312.
J.-C. Su, C.-L. Lu, and C.-W. Chu, “Design and fabrication of white light emitting diodes with an omnidirectional reflector,” Appl. Opt. 48(26), 4942–4946 ( 2009).
[Crossref] [PubMed]

Other (4)

S.-W. Chen, J.-C. Su, C.-L. Lu, S.-F. Song, and J.-H. Chen, “Phosphors-conversion white light LEDs with an omni-directional reflector,” in Photonics, Devices, and Systems IV (SPIE, 2008), pp. 71382D–71388.

K. Man, and I. Ashdown, “Accurate colorimetric feedback for RGB LED clusters,” in Sixth International Conference on Solid State Lighting (SPIE, San Diego, CA, USA, 2006), pp. 633702–633708.

Lumileds, “Luxeon Product Binning and Labeling,” in Technical Datasheet AB21 (Lumileds Lighting LLC, San Jose, CA).

I. Speier, and M. Salsbury, “Color temperature tunable white light LED system,” in Sixth International Conference on Solid State Lighting (SPIE, San Diego, CA, USA, 2006), pp. 63371F–63312.