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Philips Lumileds implements Lumiramic phosphor technology as part of its roadmap to deliver a supportable supply of white LEDs for general lighting

May 28, 2008

Philips


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LIGHTFAIR INTERNATIONAL, LAS VEGAS — The general lighting industry can look forward
to dramatic improvements in the manufacture and supportability of color-consistent, white
power LEDs under a new technology roadmap for Lumiramic phosphor technology. As a
kickoff to the new technology, an immediate reduction in the number of white color bins for the
company’s warm white LUXEON Rebel has been implemented.
“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 headon
with a superior technical solution for our
LUXEON LEDs,” said Michael Holt, CEO of Philips
Lumileds.
The binning of white LEDs is a “work-around” to
manage the variation in white color and tint that
are the result of today’s manufacturing processes.
The inefficiencies of binning create structural vulnerability in the supply chain for the market.
To date, there have been no solutions that decrease or eliminate this risk. The only way most
manufacturers can consistently produce sufficiently large quantities of the desired bins for
general lighting has been to increase the volume of white LEDs manufactured and discard those
Warm white bins at top right are being eliminated
immediately for LUXEON Rebel
that don’t fit in the desired color spaces. However, this does little to address the supply chain
risk and produces tremendous waste, the cost of which must be absorbed by the market.
Over the last 18 months, flux improvements have resulted in power LEDs delivering upwards of
80 lm/W. Light output and efficiency has been a primary obstacle to adoption. Now that solidstate
lighting systems can outperform fluorescent, the industry must continue to improve the
quality, consistency and availability of white LEDs.
Philips Lumileds patented Lumiramic phosphor
technology enables specific targeting for
correlated color temperature which for the first
time puts the manufacturer in control of the
color temperature and tint and allows for
production variance to be minimized. The new
technology and production innovation from
Philips Lumileds will result in a single row of
white bins along the black body locus. Each bin
will be sized to represent a total space no more
than 3 MacAdam ellipses. Controlling the production process for white LEDs enables Philips
Lumileds to accelerate growth of the general lighting market.
With a reduction in bin spaces for warm white already in place, Philips Lumileds will turn its
attention to a similar reduction for neutral and cool white LUXEON Rebel products. When
complete, the process to remove additional bins and shrink remaining bins on the black body
locus will commence.
About Lumiramic Phosphor Technology
Philips expertise in phosphors and Lumileds
power LED technologies uniquely combined to
create the powerful phosphor conversion process
that will bring supply-chain stability to the solidstate
lighting market. Lumiramic phosphor
technology utilizes a ceramic phosphor plate and
Philips Lumileds’ Thin Film Flip Chip (TFFC)
Philips Lumileds white binning chart with full
implementation of Lumiramic phosphor technology.
Lumiramic phosphor plate
Thin Film Flip Chip
LUXEON TFFC die with Lumiramic Phosphor Plate
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. While
the concept is well understood, years of invention were required to identify phosphors and
create the ceramic plates that would be stable in the intended environments. The solution also
required that an LED die with an unobstructed surface be created to which the ceramic plate
could be bonded. This optical alignment in which there is no anode or cathode in the light path
is unique to Philips Lumileds TFFC die.
About Philips Lumileds
Philips Lumileds is the world's leading provider of power LEDs for everyday lighting applications.
The company's recent records for light output, efficacy and thermal management are direct
results of the ongoing commitment to advancing solid-state lighting technology and enabling
lighting solutions that are more environmentally friendly, help reduce CO2 emissions and reduce
the need for power plant expansion. Philips Lumileds' LUXEON LEDs are enabling never before
possible applications in the general lighting, automotive, digital imaging, display, and signage
markets. More information about the company's LUXEON® LED products and solid-state
lighting technologies can be found at www.philipslumileds.com.
About Royal Philips Electronics
Royal Philips Electronics of the Netherlands (NYSE: PHG, AEX: PHI) is a global leader in
healthcare, lighting and consumer lifestyle, delivering people-centric, innovative products,
services and solutions through the brand promise of “sense and simplicity”. Headquartered in
the Netherlands, Philips employs approximately 134,200 employees in more than 60 countries
worldwide. With sales of USD 42 billion (E26 billion) in 2007, the company is a market leader in
medical diagnostic imaging and patient monitoring systems, energy efficient lighting solutions, as
well as lifestyle solutions for personal wellbeing. News from Philips is located at
www.philips.com/newscenter.



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