IEC 62341-6-1:2017
(Main)Organic light emitting diode (OLED) displays - Part 6-1: Measuring methods of optical and electro-optical parameters
Organic light emitting diode (OLED) displays - Part 6-1: Measuring methods of optical and electro-optical parameters
IEC 62341-6-1:2017(E) specifies the standard measurement conditions and measuring methods for determining optical and electro-optical parameters of organic light-emitting diode (OLED) display modules and, where specified, OLED display panels. These methods are limited to flat displays measured in a dark room.
This second edition cancels and replaces the first edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) extends the applicability of the measuring methods to include OLED displays that have multi-primary or red, green, blue and white sub-pixels;
b) adds a method to characterize how the luminance is affected by the amount of content on the screen;
c) adds a method to determine the dark room colour gamut volume in the CIELAB colour space.
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IEC 62341-6-1 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
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Organic light emitting diode (OLED) displays –
Part 6-1: Measuring methods of optical and electro-optical parameters
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
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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
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IEC 62341-6-1 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –
Part 6-1: Measuring methods of optical and electro-optical parameters
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.260 ISBN 978-2-8322-3845-5
– 2 – IEC 62341-6-1:2017 © IEC 2017
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
4 Structure of measuring equipment . 8
5 Standard measuring conditions . 8
5.1 Standard environmental conditions for measurements . 8
5.2 Standard dark room conditions for measurements . 8
5.3 Standard setup conditions . 9
5.3.1 General . 9
5.3.2 Adjustment of OLED display modules . 9
5.3.3 Starting conditions of measurements . 9
5.3.4 Measuring equipment requirements . 9
5.4 Standard locations of measurement field. 11
5.5 Standard test patterns . 11
6 Measuring methods for optical parameters . 16
6.1 Primary luminance, colour, and uniformity of full-colour high-resolution
modules . 16
6.1.1 Purpose . 16
6.1.2 Measuring conditions . 16
6.1.3 Measuring method for high-resolution full-colour modules . 16
6.1.4 Maximum luminance of white and RGB primaries . 18
6.1.5 Average colour of white and RGB primaries . 18
6.1.6 Luminance uniformity of white and RGB primaries . 19
6.1.7 Colour non-uniformity of white and RGB primaries . 19
6.1.8 Colour additivity of white and RGB primaries . 20
6.1.9 White correlated colour temperature . 20
6.2 Primary luminance, colour, and uniformity of low-resolution modules . 21
6.2.1 Purpose . 21
6.2.2 Measuring conditions . 21
6.2.3 Measuring method for low-resolution modules and segmented displays . 21
6.3 Signal loading . 21
6.3.1 Purpose . 21
6.3.2 Measuring conditions . 21
6.3.3 Measuring methods . 21
6.4 Dark room contrast ratio . 22
6.4.1 Purpose . 22
6.4.2 Measuring conditions . 22
6.4.3 Measuring method . 23
6.5 Display colour gamut, colour gamut area, and colour gamut volume . 23
6.5.1 Purpose . 23
6.5.2 Measuring conditions . 23
6.5.3 Measuring method . 23
6.5.4 Display colour gamut . 24
6.5.5 Display colour gamut area in CIE 1976 chromaticity diagram . 24
6.5.6 Colour gamut volume . 24
7 Measuring methods for power consumption . 26
7.1 Purpose . 26
7.2 Measuring conditions . 26
7.3 Measuring method . 26
Annex A (normative) Response time of passive matrix display panels . 28
A.1 Purpose . 28
A.2 Measuring conditions . 28
A.3 Measuring method . 28
Annex B (normative) Luminance current efficiency . 30
B.1 Purpose . 30
B.2 Measuring conditions . 30
B.3 Measuring method . 30
Annex C (informative) Veiling glare frustum . 32
Annex D (informative) Methods to obtain the correlated colour temperature (CCT) from
chromaticity coordinates . 33
D.1 Method 1: using McCamy’s approximate formula. 33
D.2 Method 2: using Javier Hernandez-Andres’s approximate formula . 33
D.3 Method 3: graphical determination of correlated colour temperature. 34
Annex E (informative) Measuring the performance of modern colour-managed displays
and panels . 36
E.1 Legacy displays . 36
E.2 Modern displays . 36
E.3 Results . 38
E.4 Conclusion . 41
Annex F (informative) Simple window luminance and colour measurements . 42
F.1 Background. 42
F.2 Measuring conditions . 42
F.3 Maximum full-screen luminance . 42
F.4 4 % window luminance . 42
F.5 Sampled luminance non-uniformity . 42
F.6 4 % window centre colour . 43
F.7 Sampled colour non-uniformity . 44
Bibliography . 45
Figure 1 – Layout diagram of measurement setup . 10
Figure 2 – Standard measurement positions in the active area of the display . 11
Figure 3 – Test pattern scaling used to define the area size of the coloured rectangles
in the active area of the display . 12
Figure 4 – Low APL loading series of red, green, blue, and white test patterns used for
basic luminance, colour, and uniformity measurements . 13
Figure 5 – Medium (top) and high (bottom) APL loading versions of CTR pattern . 14
Figure 6 – Standard low APL RGBCMY test pattern used for centre luminance and
colour measurements . 15
Figure 7 – Optional medium APL RGBCMY test pattern used for centre luminance and
colour measurements . 16
– 4 – IEC 62341-6-1:2017 © IEC 2017
Figure 8 – Sequence for measuring luminance and colour at the nine standard display
positions for all coloured tile patterns . 17
Figure 9 – Colour of blackbody source at various temperatures as represented on the
CIE 1931 chromaticity diagram . 20
Figure 10 – Example representation of the same primary colours
...
IEC 62341-6-1 ®
Edition 2.0 2017-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –
Part 6-1: Measuring methods of optical and electro-optical parameters
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 Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland 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.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
IEC 62341-6-1 ®
Edition 2.0 2017-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –
Part 6-1: Measuring methods of optical and electro-optical parameters
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.260 ISBN 978-2-8322-3887-5
– 2 – IEC 62341-6-1:2017 RLV © IEC 2017
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, and units abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 9
4 Structure of measuring equipment . 9
5 Standard measuring conditions . 9
5.1 Standard measuring environmental conditions for measurements . 9
5.2 Standard measuring dark room conditions for measurements. 9
5.3 Standard setup conditions . 10
5.3.1 General . 10
5.3.2 Adjustment of OLED display modules . 10
5.3.3 Starting conditions of measurements . 10
5.3.4 Conditions of Measuring equipment requirements . 10
5.4 Standard locations of measurement field. 13
5.5 Standard test patterns . 13
6 Measuring methods for optical parameters . 18
6.1 Primary luminance, colour, and its uniformity of full-colour high-resolution
modules . 18
6.1.1 Purpose . 18
6.1.2 Measuring conditions . 18
6.1.3 Measuring method for high-resolution full-colour modules . 19
6.1.4 Maximum luminance of white and RGB primaries . 20
6.1.5 Average colour of white and RGB primaries . 20
6.1.6 Luminance uniformity of white and RGB primaries . 21
6.1.7 Colour non-uniformity of white and RGB primaries . 21
6.1.8 Colour additivity of white and RGB primaries . 22
6.1.9 White correlated colour temperature . 22
6.2 Primary luminance, colour, and uniformity of low-resolution modules . 23
6.2.1 Purpose . 23
6.2.2 Measuring conditions . 23
6.2.3 Measuring method for low-resolution modules and segmented displays . 23
6.3 Chromaticity, colour uniformity, colour gamut and white field correlated
colour temperature .
6.3.1 Purpose .
6.3.2 Measuring conditions .
6.3.3 Measuring method .
6.3 Signal loading . 23
6.3.1 Purpose . 23
6.3.2 Measuring conditions . 23
6.3.3 Measuring methods . 23
6.4 Dark room contrast ratio . 24
6.4.1 Purpose . 24
6.4.2 Measuring conditions . 24
6.4.3 Measuring method . 29
6.5 Display colour gamut, colour gamut area, and colour gamut volume . 29
6.5.1 Purpose . 29
6.5.2 Measuring conditions . 30
6.5.3 Measuring method . 30
6.5.4 Display colour gamut . 30
6.5.5 Display colour gamut area in CIE 1976 chromaticity diagram . 30
6.5.6 Colour gamut volume . 31
7 Measuring methods for power consumption . 32
7.1 Purpose . 32
7.2 Measuring conditions . 32
7.3 Measuring method . 33
7.3.1 Measuring the power consumption of the OLED display module .
Annex A (normative) Response time of passive matrix display panels . 35
A.1 Purpose . 35
A.2 Measuring conditions . 35
A.3 Measuring method . 35
Annex B (normative) Luminance current efficiency . 37
B.1 Purpose . 37
B.2 Measuring conditions . 37
B.3 Measuring method . 37
Annex C (informative) Veiling glare frustum . 39
Annex D (informative) Methods to obtain the correlated colour temperature (CCT) from
chromaticity coordinates . 40
D.1 Method 1: using McCamy’s approximate formula. 40
D.2 Method 2: using Javier Hernandez-Andres’s approximate formula . 40
D.3 Method 3: graphical determination of correlated colour temperature. 41
Annex E (informative) Measuring the performance of modern colour-managed displays
and panels . 43
E.1 Legacy displays . 43
E.2 Modern displays . 43
E.3 Results . 45
E.4 Conclusion . 48
Annex F (informative) Simple window luminance and colour measurements . 49
F.1 Background. 49
F.2 Measuring conditions . 49
F.3 Maximum full-screen luminance . 49
F.4 4 % window luminance . 49
F.5 Sampled luminance non-uniformity . 50
F.6 4 % window centre colour . 52
F.7 Sampled colour non-uniformity . 52
Bibliography . 53
Figure 1 – Layout diagram of measurement setup . 10
Figure 2 – Standard measurement positions in the active area of the display . 11
Figure 3 – Measurement points .
Figure 3 – Test pattern scaling used to define the area size of the coloured rectangles
in the active area of the display . 12
Figure 4 – Example of the colour gamut .
– 4 – IEC 62341-6-1:2017 RLV © IEC 2017
Figure 4 – Low APL loading series of red, green, blue, and white test patterns used for
basic luminance, colour, and uniformity measurements .
...
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