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6 June 2008


Lumiramic phosphor technology reduces LED binning

Philips Lumileds of San Jose, CA, USA has introduced Lumiramic phosphor technology, which it says has reduced the number of white color bins for its warm-white Luxeon Rebel LEDs. The new technology is part of the firm's roadmap to deliver a supportable supply of color-consistent, white power LEDs for general lighting.

“For all the acknowledged benefits of power LEDs, such as efficiency, sustainability, and durability, we believe that providing a supportable, high color-quality supply of white LEDs is the single biggest challenge facing the power LED industry and today Philips Lumileds is addressing this head on with a superior technical solution for our Luxeon LEDs,” says Philips Lumileds’ CEO Michael Holt.

According to the firm, the binning of white LEDs is a ‘work-around’ to manage the variation in white color and tint that result from current manufacturing processes, but the inefficiencies of binning create vulnerability in the supply chain.

Philips Lumileds says that its patented Lumiramic phosphor technology enables specific targeting for correlated color temperature, for the first time putting the manufacturer in control of the color temperature and tint and allowing for production variance to be minimized. The technology will result in a single row of white bins along the black-body locus, each sized to represent a total space no more than 3 MacAdam ellipses.

Lumiramic phosphor technology utilizes a ceramic phosphor plate and Lumileds’ thin-film flip-chip (TFFC) technology. The process matches royal-blue (pump) TFFC die that have been characterized and sorted by wavelength to pre-measured ceramic phosphor plates (Lumiramic). By matching Lumiramic plates of the appropriate thickness with the correct wavelength of TFFC die in advance of final manufacturing, a specific correlated color temperature can be targeted.

With a reduction in bin spaces for warm-white LEDs in place, Philips Lumileds says it will now turn its attention to a similar reduction for neutral- and cool-white Luxeon Rebel products. After this, the process to remove additional bins and shrink remaining bins on the black-body locus will begin.

See related item:

Lumileds boosts Luxeon Rebel LED to 100lm

Search: Lumileds Luxeon Rebel Warm-white LEDs

Visit: www.philipslumileds.com