PRODUCT SELECTOR GUIDE
JENCOLOR®: LED COLOR MANAGEMENT
MAZeT - THE EXPERTS IN COLOR SENSING TECHNOLOGIES & COLOR MANAGEMENT
LED Light Color
Management
JENCOLOR® | AVNET LightSpeed
LED COLOR MANAGEMENT SOLUTIONS
THE PROBLEM: COLOR DRIFTS AND ACCURACY LOSS DUE TO BINNING, AGING & TEMPERATURE
Aside of the benefits of LEDs, the technology also comes with many downsides that can
AGING EFFECTS - Even though the lifecycle of LED data sheets document beneficial
result to serious problem during the development. The most common problems and
statistics compared to the traditional light bulb - LEDs also experience brightness drifts
interference factors are color drifts based on binning, temperature dependencies or
from the first day of usage. Usually, the lifecycle of an LED is based on a brightness loss
aging of LEDs. These effects cause major problems if it is the goal to maintain
of more than 70 % compared to the original values. Far before the 70 % loss-level,
standardized CCT, color values or color brightness levels. Especially, when looking at not
differences
only one but multiple illumination fixtures or lighting systems. High maintenance costs,
lighting effects can be experienced.
and
heterogeneous
increased exchange cycles and restocking costs are common side effects. But what can
be done to avoid these common problems?
These sample values from OSRAM
demonstrate
the
brightness
TEMPERATURE DEPENDENCIES - The dependence of the brightness and the wavelength
characteristics of a RGB LED within
in correlation to given temperatures are known negative issues of LED light sources. It is
the first 10,000 hours of operation.
a known fact that the dependence of a red LED is greater than compared to a blue LED.
An interesting fact is that not only
The brightness decreases by almost 40 % during temperature drifts of 5°C (41°F) to 70°C
brightness
(158°F). Shifts within the color perception and brightness of mixed light are inevitable.
experienced, but also a temporary
Additionally, the user must decide how to calibrate the light source, depending on the
increase of the light output has been
environmental influences (such as temperature or pressure) and desired output of light
recorded.
color. Especially in larger projects, consisting of multiple light sources it is problematic to
differ, depending on the used materials within red, green and blue LEDs. It has been
maintain stable light color conditions. Even inexperienced viewers can see color
proven that the brightness loss even within the first 5,000 operating hours can vary
differences and heterogeneous light color conditions at color point tolerance levels of ∆E
between 5 % to 25 %. In other words - drift effects that can be seen by the average human
= 2.5 to 3.
eye. Achieving long-term color point stability is also a requirement to meet Energy Star
loss
These
could
be
characteristics
Image Source: ©OSRAM—
regulations.
SUMMARY: Binning, temperature and aging drift effects make it hard to exchanging
single LEDs within a lighting system. Environmental effects or damage can increase
Example: A specific characteristic of the human eye is to react to color differences -
these factors and result to expensive maintenance tasks. These maintenance and running
whereas the evaluation of the absolute color value is problematic without comparison
costs can be drastically reduced via feedback control options, also allowing to monitor
values. These differences in color perception can even be increased by varying the
characteristics such as the CCT, color values, CRI, color brightness or estimated life-time
brightness levels. Therefore slight color variances in LED panels, multiple fixtures or
of a LED system. Applications: LED lighting systems, LED spot lights, cabin lighting,
backlighting solutions can result into a major technological issue.
backlight displays, daylight management or Human Centric Lighting applications (HCL)
JENCOLOR® | AVNET LightSpeed
LED
SOLUTIONS
LEDCOLOR
COLORMANAGEMENT
MANAGEMENT
SOLUTIONS
THE SOLUTION: JENCOLOR® LED LIGHT COLOR MANAGEMENT
® LED LIGHT COLOR MANAGEMENT
THE
SOLUTION:
ELLIMINATION
OFJENCOLOR
COLOR DRIFTS
DUE TO BINNING, AGE & TEMPERATURE
ELLIMINATION OF COLOR DRIFTS DUE TO BINNING, AGE & TEMPERATURE
THE SOLUTION - There are known solutions to stabilize the current and voltage of
THE BENEFITS - The given solution sets itself apart from traditional lighting systems
LEDs. There are also solutions that measure the temperature of LEDS (as far as
by utilizing control options of LED sources, eliminating negative aging, temperature
technological possible) and report these values to the LED driver to create a
and light color shifts, generating long-term stability and reducing potential future
temperature control-loop. These solutions are indirect regulation solutions. An
maintenance costs. For example: A production hall can coordinate the maintenance
alternative method is the direct regulation via light color. This concept is shown in the
cycles due to the monitored life time of multiple LED fixtures. Standardized color or
following image.
CCT values can be achieved regarding Energy Star or government-specific regulations.
It is important to choose a sensor that does not show aging-effects itself and is based
on the perception of the human eye. The JENCOLOR® sensors by MAZeT offer exactly
these characteristics.
TRUE COLOR SENSOR - MTCSiCF - The MTCSiCF is a True Color sensor IC with a filter
function based on CIE 1931/DIN 5033 in a compact QFN16 package. The MTCSiCF is
long-term stable over the entire product life-time and resistant to external influences
such as temperature drifts, due to the special JENCOLOR® interference technology.
SIGNAL CONDITIONER IC - MCDC04EQ - The MCDC04EQ converts multi-channel photo
currents via digital charge-integration (16 bit) directly to optical sensors (e.g. color
sensors). The data is transferred to a host via I²C. Process programmable settings,
such as amplification and integration time, allow the converter to perform at a very
high dynamic range of 1 to 1,000,000.
The demonstrated solution differs from the (unregulated) control option by
implementing a color sensor, depending on the lighting concept, to send RGB or other
color values to the micro controller to directly regulate the LED light output. The
software of the micro controller compares the given and set values and directs these
to the output driver. This concept works for any LED light source, either RGB, RGBW or
RGBx and in various applications.
True Color Sensor
Signal Conditioner IC
Integrated TC Sensor
OEM Boards I²C
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JENCOLOR® | AVNET LightSpeed
THE BENEFITS OF JENCOLOR® INTERFERENCE FILTER TECHNOLOGY
The secret behind MAZeT’s sensors is the worldwide unique JENCOLOR® interference filter
technology. Interference filters with micro stacks only let specific wavelengths reach the
CONTACT & QUOTATIONS
Advanced LED and SSL Solutions from Avnet
detector and do not drift in wavelength over time or via temperature influences. Other than
15231 Avenue of Science, Suite 150 | San Diego, California 92128
absorption filter based sensors (standard of common color sensors), the interference filter
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technology does not rely on degradable filter materials. Therefore, they are an ideal solution for
long-term stable compensation and correction of specific color values such as CCT, color
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brightness or coordinates. High transmission ranges and low cut-off in the region beyond 95 %
allow for pin-point accuracy even in challenging tasks and environments.
Utilizing the standard observer function CIE 1931 (human eye perception) it allows to see color at
an accuracy that is not achievable by standard RGB or common color sensors. True Color sensor
Cary Eskow - Global Director, LED and Smart Lighting Programs
Email: [email protected]
Office: 858.385.7555
output values are directly measured in XYZ and allow simple calculations within various color
spaces. True Color sensors utilized in an LED system for feedback control enable an accuracy
of up to 1-2 MacAdams ellipses.
True Color
(Interference Filter)
RGB or other
Absorption Filters
Human eye perception
RGB values limited to the
(CIE 1931/DIN 5033) as XZY
specific wavelengths
No drift effects from aging or
Have wavelengths drifts over
temperature
temperature and time
Phosphor aging
Guaranteed compensation
Depends on application
Brightness levels
High dynamic range
Limited dynamic range
Temperature range
Up to 100°C possible
Commonly limited to 65°C
Color accuracy
Color drift effects
JENCOLOR® | AVNET LightSpeed
CONTACT & SUPPORT
MAZeT GmbH | Göschwitzer Straße 32 | 07745 Jena | Germany
Phone: +49.3641.2809.0 | Fax +49.3641.2809.12 | [email protected]
www.mazet.de
Kevin Jensen - International Sales & Marketing
Email: [email protected]
Office: +49-3641-2809-9911
Mobile: +49-173-8150990
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