IEC 62341-6-1:2022

Organic light emitting diode (OLED) displays - Part 6-1: Measuring methods of optical and electro-optical parameters

IEC 62341-6-1:2022 specifies the standard measuring conditions and measuring methods for determining the 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 edition includes the following significant technical changes with respect to the previous edition:
- measuring methods for power consumption of displays that have an embedded video connection terminal are added;
- the contents description including video signal for power consumption is modified.

General Information

• Status: Published
• Publication Date: 13-Oct-2022
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 18 - TC 110/WG 18
• Current Stage: PPUB - Publication issued
• Start Date: 18-Nov-2022
• Completion Date: 14-Oct-2022

Relations

• Revises: IEC 62341-6-1:2017 - Organic light emitting diode (OLED) displays - Part 6-1: Measuring methods of optical and electro-optical parameters
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62341-6-1 ®
Edition 3.0 2022-10
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 Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
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.

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IEC 62341-6-1 ®
Edition 3.0 2022-10
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 978-2-8322-5856-9

– 2 – IEC 62341-6-1:2022 © IEC 2022
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 . 9
5.1 Standard measuring environmental conditions . 9
5.2 Standard measuring dark room conditions . 9
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 . 12
6 Measuring methods for optical parameters . 17
6.1 Primary luminance, colour, and uniformity of full-colour high-resolution
modules . 17
6.1.1 Purpose . 17
6.1.2 Measuring conditions . 17
6.1.3 Measuring methods for high-resolution full-colour modules . 17
6.1.4 Maximum luminance of white and RGB primaries . 19
6.1.5 Average colour of maximum white and RGB primaries . 19
6.1.6 Luminance uniformity of white and RGB primaries . 20
6.1.7 Colour non-uniformity of maximum white and RGB primaries . 20
6.1.8 Colour additivity of maximum white and RGB primaries . 21
6.1.9 White correlated colour temperature . 21
6.2 Primary luminance, colour, and uniformity of low-resolution modules . 21
6.2.1 Purpose . 21
6.2.2 Measuring conditions . 22
6.2.3 Measuring methods for low-resolution modules and segmented displays . 22
6.3 Signal loading . 22
6.3.1 Purpose . 22
6.3.2 Measuring conditions . 22
6.3.3 Measuring methods . 22
6.4 Dark room contrast ratio . 23
6.4.1 Purpose . 23
6.4.2 Measuring conditions . 23
6.4.3 Measuring method . 23
6.5 Display colour gamut, colour gamut area, and colour gamut volume . 24
6.5.1 Purpose . 24
6.5.2 Measuring conditions . 24
6.5.3 Measuring methods . 24
6.5.4 Display colour gamut . 24

6.5.5 Display colour gamut area in the CIE 1976 chromaticity diagram . 25
6.5.6 Colour gamut volume . 25
7 Measuring methods for power consumption . 27
7.1 Purpose . 27
7.2 Measuring conditions . 27
7.3 Measuring methods . 27
7.3.1 Measuring the power consumption relevant to luminance of the OLED
display module without a signal decoding process . 27
7.3.2 Measuring the power consumption of the OLED display module’s

embedded video connection terminal with a signal decoding process . 29
Annex A (normative) Response time of passive matrix display panels . 31
A.1 Purpose . 31
A.2 Measuring conditions . 31
A.3 Measuring methods . 31
Annex B (normative) Luminance current efficiency . 33
B.1 Purpose . 33
B.2 Measuring conditions . 33
B.3 Measuring methods . 33
Annex C (informative) Veiling glare frustum . 35
Annex D (informative) Methods to obtain the correlated colour temperature (CCT) from
chromaticity coordinates . 36
D.1 Method 1: Use of McCamy’s approximate formula . 36
D.2 Method 2: Use of Javier Hernandez-Andres’s approximate formula . 36
D.3 Method 3: Graphical determination of correlated colour temperature . 37
Annex E (informative) Measuring performance of modern colour-managed displays

and panels . 40
E.1 Legacy displays . 40
E.2 Modern displays . 40
E.3 Results . 42
E.4 Conclusion . 45
Annex F (informative) Simple window luminance and colour measurements . 46
F.1 Background. 46
F.2 Measuring conditions . 46
F.3 Maximum full screen luminance . 46
F.4 4 % window luminance . 46
F.5 Sampled luminance non-uniformity . 46
F.6 4 % window centre colour . 47
F.7 Sampled colour non-uniformity . 48
Bibliography . 49

Figure 1 – Layout diagram of measurement setup . 10
Figure 2 – Standard measurement positions in the display active area . 12
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

– 4 – IEC 62341-6-1:2022 © IEC 2022
Figure 6 – Standard low APL RGBCMY test pattern used for centre luminance and
colour measurements . 15
Figure 7 – Optional medium signal loading RGBCMY test pattern used for centre

luminance and colour measurements . 16
Figure 8 – Sequence for measuring luminance and colour at the nine standard display
positions for all coloured tile patterns . 18
Figure 9 – Colour of blackbody source at various temperatures as represented on the
CIE 1931 chromaticity diagram . 21
Figure 10 – Example of representation of the same primary colours in the CIE 1931

(left) and CIE 1976 (right) chromat
...

IEC 62341-6-1 ®
Edition 3.0 2022-10
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 Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
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 corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 19 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 62341-6-1 ®
Edition 3.0 2022-10
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 978-2-8322-5895-8

– 2 – IEC 62341-6-1:2022 RLV © IEC 2022
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 . 9
5.1 Standard measuring environmental conditions . 9
5.2 Standard measuring dark room conditions . 9
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. 12
5.5 Standard test patterns . 12
6 Measuring methods for optical parameters . 18
6.1 Primary luminance, colour, and uniformity of full-colour high-resolution
modules . 18
6.1.1 Purpose . 18
6.1.2 Measuring conditions . 18
6.1.3 Measuring methods for high-resolution full-colour modules . 18
6.1.4 Maximum luminance of white and RGB primaries . 20
6.1.5 Average colour of maximum white and RGB primaries . 20
6.1.6 Luminance uniformity of white and RGB primaries . 21
6.1.7 Colour non-uniformity of maximum white and RGB primaries . 21
6.1.8 Colour additivity of maximum white and RGB primaries . 22
6.1.9 White correlated colour temperature . 22
6.2 Primary luminance, colour, and uniformity of low-resolution modules . 22
6.2.1 Purpose . 22
6.2.2 Measuring conditions . 23
6.2.3 Measuring methods for low-resolution modules and segmented displays . 23
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 . 24
6.5 Display colour gamut, colour gamut area, and colour gamut volume . 25
6.5.1 Purpose . 25
6.5.2 Measuring conditions . 25
6.5.3 Measuring methods . 25
6.5.4 Display colour gamut . 25

6.5.5 Display colour gamut area in the CIE 1976 chromaticity diagram . 26
6.5.6 Colour gamut volume . 26
7 Measuring methods for power consumption . 28
7.1 Purpose . 28
7.2 Measuring conditions . 28
7.3 Measuring methods . 28
7.3.1 Measuring the power consumption relevant to luminance of the OLED
display module without a signal decoding process . 28
7.3.2 Measuring the power consumption of the OLED display module’s

embedded video connection terminal with a signal decoding process . 30
Annex A (normative) Response time of passive matrix display panels . 33
A.1 Purpose . 33
A.2 Measuring conditions . 33
A.3 Measuring methods . 33
Annex B (normative) Luminance current efficiency . 35
B.1 Purpose . 35
B.2 Measuring conditions . 35
B.3 Measuring methods . 35
Annex C (informative) Veiling glare frustum . 37
Annex D (informative) Methods to obtain the correlated colour temperature (CCT) from
chromaticity coordinates . 38
D.1 Method 1: Use of McCamy’s approximate formula . 38
D.2 Method 2: Use of Javier Hernandez-Andres’s approximate formula . 38
D.3 Method 3: Graphical determination of correlated colour temperature . 39
Annex E (informative) Measuring performance of modern colour-managed displays

and panels . 42
E.1 Legacy displays . 42
E.2 Modern displays . 42
E.3 Results . 44
E.4 Conclusion . 49
Annex F (informative) Simple window luminance and colour measurements . 50
F.1 Background. 50
F.2 Measuring conditions . 50
F.3 Maximum full screen luminance . 50
F.4 4 % window luminance . 50
F.5 Sampled luminance non-uniformity . 50
F.6 4 % window centre colour . 51
F.7 Sampled colour non-uniformity . 52
Bibliography . 53

Figure 1 – Layout diagram of measurement setup . 11
Figure 2 – Standard measurement positions in the display active area . 12
Figure 3 – Test pattern scaling used to define the area size of the coloured rectangles

in the active area of the display . 13
Figure 4 – Low APL loading series of red, green, blue, and white test patterns used for
basic luminance, colour, and uniformity measurements . 14
Figure 5 – Medium (top) and high (bottom) APL loading versions of CTR pattern . 15

– 4 – IEC 62341-6-1:2022 RLV © IEC 2022
Figure 6 – Standard low APL RGBCMY test pattern used for centre luminance and
colour measurements . 16
Figure 7 – Optional medium APL signal loading RGBCMY test pattern used for centre
luminance and colour measurements . 17
Figure 8 – Sequence for measuring luminance and colour at the nine standard display
positions for all coloured tile patterns . 19
Figure 9 – Colour of blackbody source at various temperatures as represented on the
CIE 1931 chromaticity diagram . 22
Figure 10 – Example of representation of the same primary colours in the CIE 1931

(left) and CIE 1976 (right) chromaticity diagrams . 26
Figur
...