OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 2 — Jan. 10, 2011
  • pp: 177–182

Chromaticity stability of phosphor-converted white light-emitting diodes with an optical filter

Jung-Chieh Su, Siao-Fang Song, and Hung-Shing Chen  »View Author Affiliations


Applied Optics, Vol. 50, Issue 2, pp. 177-182 (2011)
http://dx.doi.org/10.1364/AO.50.000177


View Full Text Article

Enhanced HTML    Acrobat PDF (682 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

The thermal stability of blue LEDs and yellow YAG phosphor for blue-pumped white LEDs is critical to the performance of white LEDs, including the color properties and luminous efficacy. To investigate the thermal effect on the color properties of emitted white light, the junction temperature of the excitation blue LED was raised by increasing the supplied current. However, by choosing an optical filter with the appropriate transmittance spectrum for processing a portion of the blue light output and reexciting the secondary yellow emission, we observed a reduction in color instability and lower color temperature across the current range of 20 – 200   mA . Moreover, the color temperature distribution was improved.

© 2011 Optical Society of America

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(350.3950) Other areas of optics : Micro-optics

ToC Category:
Optical Devices

History
Original Manuscript: August 19, 2010
Revised Manuscript: November 6, 2010
Manuscript Accepted: November 16, 2010
Published: January 7, 2011

Citation
Jung-Chieh Su, Siao-Fang Song, and Hung-Shing Chen, "Chromaticity stability of phosphor-converted white light-emitting diodes with an optical filter," Appl. Opt. 50, 177-182 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-2-177

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited