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Proceedings Article

Lumiramic: a new phosphor technology for high performance solid state light sources

[+] Author Affiliations
Helmut Bechtel, Peter Schmidt, Wolfgang Busselt, Baby S. Schreinemacher

Philips Research Europe Aachen (Germany)

Proc. SPIE 7058, Eighth International Conference on Solid State Lighting, 70580E (September 02, 2008); doi:10.1117/12.794941
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From Conference Volume 7058

  • Eighth International Conference on Solid State Lighting
  • Ian T. Ferguson; Tsunemasa Taguchi; Ian E. Ashdown; Seong-Ju Park
  • San Diego, California, USA | August 10, 2008

abstract

A new phosphor technology for phosphor converted light-emitting diodes (pcLEDs) is presented. A polycrystalline ceramic plate (LumiramicTM) of Ce (III) doped yttrium gadolinium aluminum garnet (Y,GdAG:Ce) is combined with a blue LED to produce white light in the range of 5000 K correlated color temperature. Scattering and light extraction means of the Lumiramic ceramic color converter plates enable production of reliable and efficient white pcLEDs. Measurement of the optical properties of the Lumiramic plates before the final LED assembly allows pick and place packaging with exact targeting of the desired white color point of the LED. Combination with a red phosphor powder layer, coated onto the Lumiramic plate, results in high quality white pcLEDs with any color temperature required for the general lighting market.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Helmut Bechtel ; Peter Schmidt ; Wolfgang Busselt and Baby S. Schreinemacher
"Lumiramic: a new phosphor technology for high performance solid state light sources", Proc. SPIE 7058, Eighth International Conference on Solid State Lighting, 70580E (September 02, 2008); doi:10.1117/12.794941; http://dx.doi.org/10.1117/12.794941


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