IEC PAS 62707-1:2011

LED - Binning - Part 1: General requirements and white grid

IEC/PAS 62707-1:2011(E) specifies general requirements, a grid and a corresponding code for the colour binning of white LEDs emitting incoherent, visible radiation.

General Information

• Status: Replaced
• Publication Date: 07-Mar-2011
• ICS: 29.140.99 - Other standards related to lamps
• Technical Committee: SC 34A - Electric light sources
• Drafting Committee: WG 6 - TC 34/SC 34A/WG 6
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 12-Dec-2013

Relations

• Replaced By: IEC 62707-1:2013 - LED-binning - Part 1: General requirements and white colour grid
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC/PAS 62707-1
®

Edition 1.0 2011-03
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside

LED – Binning –
Part 1: General requirements and white grid



IEC/PAS 62707-1:2011(E)

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2011 IEC, Geneva, Switzerland


All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: [e-mail]
Web: www.iec.ch

About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
 Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
 IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
 Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
 Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: [e-mail]
Tel.: [phone]
Fax: [phone]

---------------------- Page: 2 ----------------------
IEC/PAS 62707-1
®

Edition 1.0 2011-03
PUBLICLY AVAILABLE
SPECIFICATION

PRE-STANDARD
colour
inside

LED – Binning –
Part 1: General requirements and white grid


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
Q
ICS 29.140.99 ISBN 978-2-88912-402-2

® Registered trademark of the International Electrotechnical Commission

---------------------- Page: 3 ----------------------
– 2 – PAS 62707-1  IEC:2011(E)
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Chromaticity bins for white LEDs . 6
4.1 Grid for white LEDs . 6
4.2 White colour bins . 8
4.3 Code for the chromaticity of white LEDs . 8
4.3.1 Optional six digit code for the designation of white colour bins in x, y
colour space . 8
4.3.2 Other codes for the designation of white colour bins . 10
5 Bin code . 10
Annex A (informative) White binning grid coordinates . 11

Figure 1 – Extension of the Planckian locus beyond T . 7
∞
Figure 2 – Example of grid points with short (four digit) designation . 10
Figure 3 – Example of white colour bin “habB22” . 10

Table 1 – Code for |p| . 9
Table 2 – Code for |j| . 9
Table 3 – Code for m and n . 9
Table 4 – Examples for white colour bin codes . 9

---------------------- Page: 4 ----------------------
PAS 62707-1  IEC:2011(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

LED – BINNING –

Part 1: General requirements and white grid


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
A PAS is a technical specification not fulfilling the requirements for a standard, but made
available to the public.
IEC-PAS 62707-1 has been processed by subcommittee 34A: Lamps, of IEC technical
committee 34: Lamps and related equipment.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document
Draft PAS Report on voting
34A/1429/PAS 34A/1448/RVD

Following publication of this PAS, which is a pre-standard publication, the technical committee
or subcommittee concerned may transform it into an International Standard.

---------------------- Page: 5 ----------------------
– 4 – PAS 62707-1  IEC:2011(E)
This PAS shall remain valid for an initial maximum period of 3 years starting from the
publication date. The validity may be extended for a single period up to a maximum of 3 years,
at the end of which it shall be published as another type of normative document, or shall be
withdrawn.
A list of all the parts in the IEC 62707 series, published under the general title LED – Binning
can be found on the IEC website.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

---------------------- Page: 6 ----------------------
PAS 62707-1  IEC:2011(E) – 5 –
LED – BINNING –

Part 1: General requirements and white grid



1 Scope
This PAS specifies general requirements, a grid and a corresponding code for the colour
binning of white LEDs emitting incoherent, visible radiation.
Other parts of this series covering chromaticity of coloured LEDs, luminous flux/luminous
intensity, colour rendering and forward voltage are in preparation or under consideration.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
1
IEC/TS 62504,___ General lighting – LEDs and LED modules – Terms and definitions
ISO 11664-1 (CIE S 014-1/E), Colorimetry – Part 1: CIE standard colorimetric observers
ISO 11664-5 (CIE S 014-5/E), Colorimetry – Part 5: CIE 1976 L*u*v* Colour space and u', v'
uniform chromaticity scale diagram
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC/TS 62504 and the
following apply.
3.1
bin
restricted range of LED performance characteristic used to delimit a subset of LEDs near a
nominal LED performance as identified by chromaticity, photometric performance and forward
voltage
(IEC/TS 62504: ___, 3.5)
3.2
grid
entity specified by a set of grid points
3.3
grid point
colour coordinate in the u', v' colour space according to ISO 11664-5 (CIE S 014-5/E) (or its
equivalent in the x, y colour space according to ISO 11664-1 (CIE S 014-1/E)) identified by
two discrete indices, the first index p counting steps along the Planckian locus, and its
extension beyond the high temperature boundary towards blue colours, and second index j
along Judd isothermal lines
___________
1
 To be published

---------------------- Page: 7 ----------------------
– 6 – PAS 62707-1  IEC:2011(E)
3.4
white colour bin
area inside a quadrilateral defined by four grid points
4 Chromaticity bins for white LEDs
4.1 Grid for white LEDs
The grid shall be aligned parallel along the Planckian locus, and its extension beyond the high
temperature boundary towards blue colours, in the first direction (Planck-axis) and along Judd
isothermal lines in the second direction (Judd-axis).
The origin of the grid shall be on the Planckian locus at T (u’/v’) = (0,18006/0,39528).
∞
The distance between adjacent grid points along the Planckian locus and its extension
beyond the high temperature boundary towards blue colours and along Judd isothermal lines
in the u’, v’ colour space shall be s = 0,00174. Steps along the Planckian locus are counted
with a positive index p, steps toward blue with a negative index p. Steps towards the
saturated colour line (gamut) along the Judd-axis are counted with a positive index j and with
negative index j in the opposite direction.
NOTE 1 = 0,00174 has been chosen as providing for the best alignment with existing chromaticity requirements.
The extension of the Planckian locus beyond T (towards blue) shall be defined as follows
∞
(see Figure 1 for information):
• Quadratic Bézier locus defined by three points:
– P : T (u’/v’) = (0,18006/0,39528)
∞
1
– P : (u’/v’) = (0,14122/0,15593 )
2
– P : (u’/v’) = (0,25680/0,01659)
3
² ²
• The Bézier locus is B(t) = P x (1-t) + P x t x (1-t) + P x t ; t ∈ (0;1)
1 2 3
NOTE 2 P is the intersection of spectral locus of the u', v' colour space and tangent of Planckian locus at T in
2 ∞
direction of blue wavelength.
NOTE 3 P corresponds to a wavelength of 380 nm on the spectral locus of the u', v' colour space.
3

---------------------- Page: 8 ----------------------
PAS 62707-1  IEC:2011(E) – 7 –
0.0.5555
505000K00K
707000K00K
0.0.55
202000K00K
1212000000KK
0.0.4545
303000K00K
∞∞ KK
0.0.44
TT =P=P
∞∞ 11
0.0.3535
00.087087
0.0.33
DisDisttaannccee
ffrromom TT
0.0.2525 ∞∞
00.174174
alaloongng BBeeziziéérr
0.0.22
00.261261
0.0.1515
PP
22
0.0.11 00.348348
0.0.0505
PP
33
0.0.11 0.0.22 0.0.33 0.0.44 0.0.55 0.0.66
u'u'

Figure 1 – Extension of the Planckian locus beyond T

∞
The coordinates u’ (p) and v’ (p) of the grid points on the Planckian locus (BB = Black
BB BB
Body) are given in Annex A, as well as the unit increments Δu’ (p) and Δv’ (p) of the
BB BB
corresponding Judd isothermal lines.
The u’ and v’ coordinates of a grid point specified by the indices p and j are given by
u’(p, j) = u’ (p) + j x Δu’ (p)
BB BB
v’(p, j) = v’ (p) + j x Δv’ (p)
BB BB
or
u‘, v‘ (p, j) = (u’ (p) + j x Δu’ (p); v’ (p) + j x Δv’ (p))
BB BB BB BB
The index (p, j) = (0, 0) corresponds to the T point and the coordinates are (rounded to five
∞
digits):
u’ (0, 0) = 0,18006, v’ (0, 0) = 0,39528 or
u‘, v‘ (0, 0) = (0,18006; 0,39528)
v'v'

---------------------- Page: 9 ----------------------
– 8 – PAS 62707-1  IEC:2011(E)
Grid points in the u’, v’ coordinate system can be translated into equivalent grid points in the x,
y coordinate system using the following equations:
x(p, j) = 9u'(p, j)/(6u'(p, j) - 16v'(p, j) + 12)
y(p, j) = 4v'(p, j)/(6u'(p, j) - 16v'(p, j) + 12)
It is recommended to round grid point coordinates to 5 digits after the decimal sign.
4.2 White colour bins
White colour bins are specified as the area inside a quadrilateral. An origin (p, j) and a
positive step size m, n along the Planckian locus (or its extension beyond T ) and the Judd
∞
lines respectively is given. The quadrilateral is constructed by connecting the four grid points
[u’, v’ (p, j)], [u’, v’ (p+m, j)], [u’, v’ (p, j+n)] and [u’, v’ (p+m, j+n)]
or
[x, y (p, j)], [x, y (p+m, j)], [x, y (p, j+n)] and [x, y (p+m, j+n)]
It should be noted that white colour bins with step sizes of m or n equal 1 are not considered
to be practical in view of measurement accuracy.
4.3 Code for the chromaticity of white LEDs
4.3.1 Optional six digit code for the designation of white colour bins in x, y colour
space
This subclause specifies an optional code for white colour bins in the x, y colour space using
only six digits. The first four digits are reserved for the identification of the grid point
representing the origin of the white colour bin. The last two digits are reserved for the number
of steps along the Planckian locus (or its extension beyond T ) and the Judd lines
...