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Energy Express

  • Editor: Bernard Kippelen
  • Vol. 18, Iss. S2 — Jun. 21, 2010
  • pp: A201–A206

Conformal phosphor coating using pulsed spray to reduce color deviation of white LEDs

Hsin-Tao Huang, Chuang-Chuang Tsai, and Yi-Pai Huang  »View Author Affiliations

Optics Express, Vol. 18, Issue S2, pp. A201-A206 (2010)

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This work presents a novel “pulsed spray (PS)” process for the coating of yellow YAG:Ce3+ phosphor on blue InGaN-based light emitting diodes (LEDs). To coat a phosphor layer of high quality on an LED chip surface, the PS approach is used and studied because of the uniform color distribution, providing a wide range of color temperatures. This PS coating approach applies phosphor by exploiting mechanical principles without risk of chemical pollution. Additionally, it can be applied to wire-bonded LEDs and an array of LED chips on a substrate to fabricate a large-area, planar illumination system of high optical quality, which is easy to manufacture.

© 2010 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(350.4600) Other areas of optics : Optical engineering

ToC Category:
Light-Emitting Diodes

Original Manuscript: May 10, 2010
Revised Manuscript: June 3, 2010
Manuscript Accepted: June 3, 2010
Published: June 7, 2010

Hsin-Tao Huang, Chuang-Chuang Tsai, and Yi-Pai Huang, "Conformal phosphor coating using pulsed spray to reduce color deviation of white LEDs," Opt. Express 18, A201-A206 (2010)

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