TEN° binning – the new OSRAM Opto Semiconductors 10° Binning

Superb Color Consistency with TENº binning

SOLERIQ® S featuring TENº binning offers unprecedented color consistency!

TENº binning addresses color consistency by adding a more representative CIE 2015 10° Observer Color Binning Scheme to the industry standard CIE 1931 2° color space. This breakthrough is necessary to cater for the typical general lighting applications where color consistency is judged under a 10° field of view rather than a 2°.

What is TEN° binning?

Imagine you are illuminating a scene with three spotlights. The white light from these three spotlights may look a bit different. You are measuring the color coordinates and they are not only within 1SDCM but they are exactly the same still they look different! How can this happen?
This problem is caused by some inaccuracies in the CIE 1931 2° xy color diagram which everyone is using right now for LED white binning. It may happen, that LEDs with different spectral composition may be measured to have exactly the same color coordinates but the visual perception still shows color differences! This spectral differences can be caused by different wavelengths of the blue chip or the converter compositions.

How can we solve this problem and measure more accurately the visual impression of color differences? With the introduction of TENº binning we are also applying the recent CIE 170-2:2015 technical report to LED binning. This report is using the latest cone fundamentals from 2006 to create a fundamental chromaticity diagram with physiological axes to ensure that the visible color differences are also captured in the measurement and binning accordingly! The new color matching functions are now summarizing 85 years of research.

What exactly is the new OSRAM Opto Semiconductors TENº binning? The introduction of the new TENº binning is implementing three important and innovative steps to the white binning of LEDs to ensure that a 3SDCM binning really only shows up to 3UNIT real color differences and not more!

  1. The change from the CIE 1931 to the latest fundamental color matching functions ensures a correct measurement of the color coordinates in a color diagram with physiologically significant axes.
  1. The move from the 2° to the 10° field of view allows a much closer match of measurement and assessment of color differences in real general lighting applications. The 2° is roughly a 20mm disc at 0,5m. The 10° field of view is equivalent to a 90mm disc at 0,5m and therefore much closer to most real life situations.
  1. The move from the xy scale with the MacAdam ellipses to a u’v’ scale that transforms the ellipses into circles creates a unified color space where color differences in all directions are equally scaled. This makes life much easier to determine if the color differences measured are equivalent to the visual color differences in all directions.

How will the luminaire manufacturer benefit from the TENº binning? The following simulated production distribution of white LEDs demonstrates the risk with a 1SDCM binning and the solution with TENº binning.
(Simulation parameters: CCT=4000K; CRI=80; blue wavelength variation=15nm)

We are using two sets of LEDs. One is binned in a tight 1SDCM binning. The other one comes in the “TENº binning”.

The 1SDCM binning looks very narrow and suggests a very small color discrepancy. The TEN° binning is a standard 3SDCM binning in the 1931 2° color diagram fulfilling all industry standards.

As we learned, the 1931 2° color space is not able to measure color differences correctly and it may happen that LEDs with a very small color difference in the old color space still have a very large color difference in the 2015 10°.

If the LEDs are measured in the 2015 10° color space, the 1SDCM binning widens significantly and shows color differences even more than 3UNITs! The TEN° binned LEDs are safely within the 3UNITs boundary and don’t lead to this kind of unpleasant surprises.

Therefore the TEN° Binning is outperforming even a 1SDCM when it comes to color differences induced by a large variation of spectral differences!

The new TEN° Binning will completely comply with the existing 1931 2° standard 3SDCM binning and can fulfill all requirements of existing designs and standards. The new 2015° 10° 3UNIT feature is an addition to provide a better protection against unexpected large color differences!

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TEN° binning – the new OSRAM Opto Semiconductors
10° Binning

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