EN IEC 63181-2:2020

SLOVENSKI STANDARD
01-april-2021
Zaslonska oprema LCD z več zasloni - 2. del: Merilne metode (IEC 63181-2:2020)
LCD multi-screen display terminals - Part 2: Measuring methods (IEC 63181-2:2020)
LCD Multi-screen Anzeigeterminals - Teil 2: Messverfahren (IEC 63181-2:2020)
Terminaux d'affichage à plusieurs écrans LCD - Partie 2: Méthodes de mesure (IEC
63181-2:2020)
Ta slovenski standard je istoveten z: EN IEC 63181-2:2020
ICS:
33.160.60 Večpredstavni (multimedijski) Multimedia systems and
sistemi in oprema za teleconferencing equipment
telekonference
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63181-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2020
ICS 31.120
English Version
LCD multi-screen display terminals - Part 2: Measuring methods
(IEC 63181-2:2020)
Terminaux d'affichage à plusieurs écrans LCD - Partie 2: LCD Multi-screen Anzeigeterminals - Teil 2: Messverfahren
Méthodes de mesure (IEC 63181-2:2020)
(IEC 63181-2:2020)
This European Standard was approved by CENELEC on 2020-07-16. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63181-2:2020 E

European foreword
The text of document 100/3413/FDIS, future edition 1 of IEC 63181-2, prepared by IEC/TC 100
"Audio, video and multimedia systems and equipment" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN IEC 63181-2:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-04-16
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-07-16
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 63181-2:2020 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60107-1:1997 NOTE Harmonized as EN 60107-1:1997 (not modified)
IEC 61747-30-1:2012 NOTE Harmonized as EN 61747-30-1:2012 (not modified)

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC/TS 63181-1 - LCD multi-screen display terminals - Part - -
1: Conceptual model
IEC 63181-2 ®
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
LCD multi-screen display terminals –

Part 2: Measuring methods
Terminaux d'affichage à plusieurs écrans LCD –

Partie 2: Méthodes de mesure
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.120 ISBN 978-2-8322-8444-5

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CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Measuring conditions . 5
4.1 Standard measuring environmental conditions . 5
4.2 Optical measuring distance . 6
5 Measurement methods of structure test for LCD multi-screen display terminals . 6
5.1 Physical gap . 6
5.1.1 General . 6
5.1.2 Method of measurement . 6
5.2 Optical gap . 7
5.2.1 General . 7
5.2.2 Method of measurement . 7
5.3 Splicing deviation . 7
5.3.1 General . 7
5.3.2 Method of measurement . 8
5.4 LCD multi-screen display terminals installation deviation . 8
5.4.1 General . 8
5.4.2 Method of measurement . 9
6 Measuring methods of LCD multi-screen display terminals' optical-electrical
performance . 10
6.1 Measuring methods of LCD multi-screen display terminals' luminance –
uniformity . 10
6.1.1 LCD splicing screen luminance uniformity . 10
6.1.2 Luminance uniformity of adjacent LCD units . 11
6.2 Measuring methods of chromatic uniformity for LCD splicing screen . 13
6.2.1 Chromatic uniformity of centre points of LCD units . 13
6.2.2 Chromatic uniformity of adjacent edge-centre points of adjacent LCD
units . 13
Bibliography . 15

Figure 1 – Illustration for physical gap and optical gap . 7
Figure 2 – Illustration for test signal . 8
Figure 3 – Illustration for diagonal distances . 9
Figure 4 – Illustration for ∠EBD . 10
Figure 5 – Illustration for testing units . 11
Figure 6 – Example for luminance measurements of edge-centre point pairs . 12

Table 1 – Example for luminance performance calculation of edge-centre point pairs
P . 13
1~4
IEC 63181-2:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LCD MULTI-SCREEN DISPLAY TERMINALS –

Part 2: Measuring methods
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
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agreement between the two organizations.
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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.
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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.
International Standard IEC 63181-2 has been prepared by IEC technical committee 100:
Audio, video and multimedia systems and equipment.
The text of this International Standard is based on the following documents:
FDIS Report on voting
100/3413/FDIS 100/3441/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 63181 series, published under the general title LCD multi-screen
display terminals, can be found on the IEC website.

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The committee
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