A Warmer, Cozier White Light: NXP Transforms LED Color Quality

A Warmer, Cozier White Light: NXP Transforms LED Color Quality 
"Sensorless Sensing" Technology Enables Accurate Correction of
Temperature Effects on LED Performance, Improving Light Quality While
Reducing Costs 
01/09/13 --  When comparing LEDs to incandescent light bulbs, there
is a noticeable difference in light quality: LED lamps when dimmed
are perceived to be "colder" than incandescents. At CES 2013 this
week, NXP Semiconductors (NASDAQ: NXPI) is demonstrating a
groundbreaking solution that allows LED lamps to closely mimic the
traditional incandescent light bulb, to produce a warmer, cozier
white light as they are dimmed. Featuring "sensorless sensing"
technology, developed and patented by NXP, this solution also has the
advantage of driving down LED system costs by eliminating external
temperature sensors, reducing the size of the heat sinks required for
LED system cooling, and significantly improving reliability. NXP's
tunable dimmable white LED demo can be viewed in its "Future
Innovations" area of its booth (CP8), and a demo video by NXP's R&D
organization is available here: http://youtu.be/bRieORS6g1w 
With incandescent light bulbs, the light color becomes warmer and
more atmospheric as they are dimmed and become less bright. In
contrast, LED lamps today are typically unable to match the colors
experienced by the users of conventional light bulbs, over the entire
dimming range. 
To enable the LED to mimic an incandescent when dimming, the NXP
solution has integrated three key features into the driving

--  Combining white and amber LEDs as a cost-effective way to create
    colors most pleasing to the human eye, following the black-body
    radiation curve
--  Implementing logarithmic correction for eye sensitivity using an
    analytical model that allows the desired color points to be achieved
    while dimming
--  Using sensorless sensing to measure LED junction temperature directly,
    enabling accurate, efficient real-time temperature correction, which
    is critical for reliable control of LED performance in any conditions

Through these features, the smart LED driver developed by NXP is able
to provide color and light output stability at any temperature and
regardless of the age of the LED. By directly measuring the LED
junction temperature through the two existing wires to the LED,
sensorless sensing tackles the challenge of LED temperature drift,
and delivers further benefits over conventional methods of LED
temperature measurement. Using sensorless sensing, no external
sensors or wiring is required, reducing the total number of
components and enabling more compact heat sinks. In addition,
sensorless sensing enables fast performance; accurate temperature
measurement (~ 1 degrees C res.); dynamic light control; independence
from the heat sink; independence from operating conditions; no need
for thermal modeling; and self-calibration to compensate for age. 
"Our research team originally set out to answer the question: What
would it take to inspire consumers to finally embrace LED lighting
with the same affection they have for incandescents? With sensorless
sensing technology, we're demonstrating a new way to achieve the warm
quality of light we associate with incandescent light bulbs, using
dimmable LED lamps. By reducing the number of components required,
sensorless sensing also helps to reduce total system costs, removing
another significant barrier to widespread LED adoption," said Michael
Bruno, senior director of business development, Advanced Technologies
and Future Innovations, NXP Semiconductors. "The elegance of this
approach significantly improves LED reliability and lifetimes, and
there is tremendous potential for sensorless sensing in other areas,
such as automotive SSL and commercial LED applications." 
For further information, please contact your NXP account manager, or
visit NXP this week at Central Plaza 8, CES 2013. 

--  VIDEO: Sensorless sensing / tunable dimmable white LED demo by NXP:

About NXP Semiconductors
 NXP Semiconductors N.V. (NASDAQ: NXPI)
provides High Performance Mixed Signal and Standard Product solutions
that leverage its leading RF, Analog, Power Management, Interface,
Security and Digital Processing expertise. These innovations are used
in a wide range of automotive, identification, wireless
infrastructure, lighting, industrial, mobile, consumer and computing
applications. A global semiconductor company with operations in more
than 25 countries, NXP posted revenue of $4.2 billion in 2011.
Additional information can be found by visiting www.nxp.com. 
Forward-looking Statements  
This document includes forward-looking statements which include
statements regarding NXP's business strategy, financial condition,
results of operations and market data, as well as other statements
that are not historical facts. By their nature, forward-looking
statements are subject to numerous factors, risks and uncertainties
that could cause actual outcomes and results to be materially
different from those projected. Readers are cautioned not to place
undue reliance on these forward-looking statements. Except for any
ongoing obligation to disclose material information as required by
the United States federal securities laws, NXP does not have any
intention or obligation to publicly update or revise any
forward-looking statements after NXP distributes this document,
whether to reflect any future events or circumstances or otherwise.
For a discussion of potential risks and uncertainties, please refer
to the risk factors listed in NXP's SEC filings. Copies of NXP's SEC
filings are available from the SEC website, www.sec.gov. 
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For further press information, please contact: 
NXP Semiconductors 
Eureka Endo
+44 795 828 7483
Melissa Chanslor
+1 415 593 8465
Jannet Chen
+86 21 22055883 
Lilian Li
+86 21 22052615
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