Enhancement of Luminous Efficacy by Random Patterning of Phosphor Matrix

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概要

• 論文の詳細を見る

• We have demonstrated the ability to increase the luminous flux and luminous efficacy of white light-emitting diodes (LEDs) by randomly patterning the surface of the yellow phosphor matrix. The phosphor was moved away from the LED die by placing it on top of a silicone optic and then roughening the surface of the phosphor/resin mixture. It was found that the roughening increases the luminous flux and efficacy by 10% over the smooth, non-patterned phosphor mixture. The roughened sample's operating voltage, luminous flux, luminous efficacy, CCT, color coordinates, and CRI were 3.2 V, 7.4 lm, 115.6 lm/W, 4244 K, (0.388, 0.448), and 61 at 20 mA, CW, and room temperature operation. A brief presentation on phosphor scattering is introduced to help explain the effect of the roughening.

著者

• Nakamura Shuji

  Materials Department University Of California

• Masui Hisashi

  Department Of Electrical And Computer Engineering University Of California

• DENBAARS Steven

  Electrical and Computer Engineering Department, University of California

• FELLOWS Natalie

  Materials Department and Electrical Engineering Department, University of California

• DENBAARS Steven

  Materials Department and Electrical Engineering Department, University of California

• MASUI Hisashi

  Materials Department, University of California

• DIANA Frederic

  Materials Department, University of California

• Denbaars Steven

  Jst-erato中村pj:ucsb

• Masui Hisashi

  Materials Department College Of Engineering University Of California

• Fellows Natalie

  Solid State Lighting And Energy Center Materials Department University Of California

• Denbaars Steven

  Electrical And Computer Engineering Department University Of California

• Denbaars Steven

  Materials Department University Of California

• Denbaars Steven

  Nicp/erato Jst Ucsb Group University Of California

• Diana Frederic

  Materials Department University Of California

• Masui Hisashi

  Solid State Lighting And Energy Center Materials Department University Of California

• Nakamura Shuji

  Materials Department University Of Cahfornia

• DenBaars Steven

  Materials Department and Electrical and Computer Engineering Department, University of California, Santa Barbara, CA 93106, U.S.A.

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