EN 61747-5-3:2010

SLOVENSKI STANDARD
SIST EN 61747-5-3:2010
01-september-2010
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Liquid crystal display devices - Part 5-3: Environmental, endurance and mechanical test
methods - Glass strength and reliability (IEC 61747-5-3:2009, modified)
Flüssigkristall-Anzeige-Bauelemente - Teil 5-3: Verfahren zur Messung von
Glasfestigkeit und Zuverlässigkeit (IEC 61747-5-3:2009, modifiziert)
Dispositifs d'affichage à cristaux liquides - Part 5-3: Méthodes d'essais d'environnement,
d'endurance et mécaniques - Résistance et fiabilité du verre (CEI 61747-5-3:2009,
modifiée)
Ta slovenski standard je istoveten z: EN 61747-5-3:2010
ICS:
31.120 Elektronske prikazovalne Electronic display devices
naprave
SIST EN 61747-5-3:2010 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61747-5-3:2010

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SIST EN 61747-5-3:2010

EUROPEAN STANDARD
EN 61747-5-3

NORME EUROPÉENNE
May 2010
EUROPÄISCHE NORM

ICS 31.120


English version


Liquid crystal display devices -
Part 5-3: Environmental, endurance and mechanical test methods -
Glass strength and reliability
(IEC 61747-5-3:2009, modified)


Dispositifs d'affichage à cristaux liquides - Flüssigkristall-Anzeige-Bauelemente -
Part 5-3: Méthodes d'essais Teil 5-3: Verfahren zur Messung
d'environnement, d'endurance von Glasfestigkeit und Zuverlässigkeit
et mécaniques - (IEC 61747-5-3:2009, modifiziert)
Résistance et fiabilité du verre
(CEI 61747-5-3:2009, modifiée)




This European Standard was approved by CENELEC on 2010-05-01. 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 Central Secretariat 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 Central Secretariat 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61747-5-3:2010 E

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SIST EN 61747-5-3:2010
EN 61747-5-3:2010 – 2 –
Foreword

The text of the International Standard IEC 61747-5-3:2009, prepared by IEC TC 110, Flat panel display
devices, together with the common modifications prepared by the CENELEC Reporting Secretariat 110
(NL), was submitted to the CENELEC formal vote and was approved by CENELEC as EN 61747-5-3 on
2010-05-01.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.

The following dates were fixed:

– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-05-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-05-01
Annex ZA has been added by CENELEC.
__________

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SIST EN 61747-5-3:2010
– 3 – EN 61747-5-3:2010
Endorsement notice
The text of the International Standard IEC 61747-5-3:2009 was approved by CENELEC as a European
Standard with the following common modifications.

COMMON MODIFICATIONS

4 Abbreviated terms

Delete:
MC mirror constant
MR mirror radius
SCSC stress corrosion susceptibility constant

8.2 Quasistatic biaxial strength (parent glass)
Replace the title by:
8.2 Quasistatic biaxial failure stress (parent glass)

8.3 Quasistatic edge strength (parent glass)
Replace the title by:
8.3 Quasistatic edge failure stress (parent glass)

Under equation 2, replace the following definition:
σ is the edge failure stress.
e

9 Fatigue and reliability calculations

9.1 General

Replace Equation 3 by:
t
F
n n−2
σ (t)dt ≈ BS

∫
0

Under Equation 3 replace the following definitions:
σ(t) is the applied stress over time,
t is the time to failure,
F

9.2 Fatigue constant calculation
Replace the title by:
9.2 Dynamic fatigue calculation

9.3 Weibull parameter calculation from dynamic failure stress data

st
Replace the last sentence of the 1 paragraph by:
For each, the effective strength, Seff is calculated as
K

Under Equation 7 add the following definition:
Seff   is the Weibull scaling factor for Seff
0

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SIST EN 61747-5-3:2010
EN 61747-5-3:2010 – 4 –
9.4 Fatigue constant calculation
Replace the title by:
9.4 Extrapolated static fatigue and Weibull distribution calculation

Replace Equation 8 by:
n 1
ln(Seff) = ln(σ ) + ln(t )
a F
n −2 n −2

Replace Equation 9 by:
mn m
ln(−ln(1−F)) +mln(Seff ) = ln(σ ) + ln(t )
0 a F
n −2 n −2

Annex A (informative) Worked test example

Replace the sentence under table A.1 by:
The failure stress value can also be estimated by measuring the mirror radius, R of the specimen’s
m
fracture surface, as shown in Figures A.2 and A.3, and using Equation (A.1).

Add the following note to Equation A.1:
σ is the failure stress for a given sample.
f

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SIST EN 61747-5-3:2010
– 5 – EN 61747-5-3:2010
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year
IEC 61747-1 - Liquid crystal and solid-state display devices - EN 61747-1 -
Part 1: Generic specification
IEC 61747-5 1998 Liquid crystal and solid-state display devices - EN 61747-5 1998
Part 5: Environmental, endurance and
mechanical test methods

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SIST EN 61747-5-3:2010

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SIST EN 61747-5-3:2010
IEC 61747-5-3
®
Edition 1.0 2009-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Liquid crystal display devices –
Part 5-3: Environmental, endurance and mechanical test methods – Glass
strength and reliability

Dispositifs d'affichage à cristaux liquides –
Partie 5-3: Méthodes d’essais d’environnement, d’endurance et mécaniques –
Résistance et fiabilité du verre

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
R
CODE PRIX
ICS 31.120 ISBN 2-8318-1037-8
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 61747-5-3:2010
– 2 – 61747-5-3 © IEC:2009
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Abbreviated terms .7
5 Apparatus.7
5.1 General .7
5.2 Method A: Quasistatic biaxial strength.8
5.3 Method B: Quasistatic edge strength (parent glass).8
5.4 Method C: Quasistatic strength (module).9
5.5 Method D: Fatigue constant.10
6 Test sample.10
6.1 General .10
6.2 Parent glass .11
6.3 Full size module .11
7 Procedure: Quasistatic loading .11
8 Stress calculations .11
8.1 General .11
8.2 Quasistatic biaxial strength (parent glass) .11
8.3 Quasistatic edge strength (parent glass) .12
8.4 Quasistatic failure load (LCD module) .12
9 Fatigue and reliability calculations .12
9.1 General .12
9.2 Fatigue constant calculation .13
9.3 Weibull parameter calculation from dynamic failure stress data .13
9.4 Fatigue constant calculation .13
10 Reporting requirements .14
Annex A (informative) Worked test example.15
Bibliography.18

Figure 1 – Schematic of ROR test fixture for measuring biaxial strength of parent glass .8
Figure 2 – Vertical bend test fixture for measuring the edge strength of parent glass .9
Figure 3 – Schematic of strength measurement for full-size LCD module .10
Figure A.1 – Weibull plot of biaxial strength of abraded glass with different thicknesses .15
Figure A.2 – Fracture surface of parent glass with 0,089 mm mirror radius .16
Figure A.3 – Plot of calculated strength versus 1/square root of mirror radius .16
Figure A.4 – Weibull distribution of the strength of 17” module.17

Table A.1 – Example of strength data before and after abrasion .15
Table A.2 – Example of strength data for all modules and low strength modules .17

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SIST EN 61747-5-3:2010
61747-5-3 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________

LIQUID CRYSTAL DISPLAY DEVICES –

Part 5-3: Environmental, endurance and mechanical test methods –
Glass strength and reliability


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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
International Standard IEC 61747-5-3 has been prepared by IEC technical committee 110:
Flat panel display devices.
This International Standard replaces the IEC/PAS 61747-5-3, published in 2007.
There have been no significant revisions since the publication of the PAS version.
This part of IEC 61747 is a sectional specification for liquid crystal display cells. It is to be
read in conjunction with the IEC 61747-1 to which it refers.

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SIST EN 61747-5-3:2010
– 4 – 61747-5-3 © IEC:2009
The text of this standard is based on the following documents:
FDIS Report on voting
110/169/FDIS 110/177/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
A list of all parts of the IEC 61747 series, under the general title Liquid crystal display devices,
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.

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SIST EN 61747-5-3:2010
61747-5-3 © IEC:2009 – 5 –
INTRODUCTION
IEC 61747-5-3 facilitates the characterization of mechanical strength properties of LCD
modules and their component glass. Analysis and testing are performed on LCD Module
component glass as well as finished LCD modules. Statistics of mechanical strength of the
modules are determined allowing a prediction of module failure probability at a given stress
level or for a given probability of failure, the maximum recommended safe loading stress for
the module.

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SIST EN 61747-5-3:2010
– 6 – 61747-5-3 © IEC:2009
LIQUID CRYSTAL DISPLAY DEVICES –

Part 5-3: Environmental, endurance and mechanical test methods –
Glass strength and reliability



1 Scope
This part of IEC 61747 applies to commercially available liquid crystal displays (LCDs).
This standard applies to all LCD types, including transmissive, reflective or transflective liquid
crystal display (LCD) modules using either segment, passive or active matrix and achromatic
or colour type LCDs that are equipped with their own integrated source of illumination or
without their own source of illumination.
The objective of this standard is to establish uniform requirements for accurate and reliable
measurements of the following LCD parameters:
a) quasistatic strength,
b) quasistatic fatigue.
The methods described in this standard apply to all sizes, small and large, liquid crystal
displays.
NOTE Methods for measuring the fatigue constant are described in this standard and are taken from the
1
referenced literature, see [13] to [20]. The primary results are formulae for estimated allowable stress for the
specified lifetime or estimated failure rate for the specified stress level. As an example, limited data for strength
and fatigue behaviour of LCD glass are included in an informative Annex A. Similarly, limited data for static
strength of LCD modules are also included and compared with that of parent glass.
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.
IEC 61747-1, Liquid crystal and solid-state display devices – Part 1: Generic specification
IEC 61747-5:1998, Liquid crystal and solid-state display devices – Part 5: Environmental,
endurance and mechanical test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
strength
stress at which a sample fails for a given loading condition
3.2
LCD surface strength
biaxial strength wherein surface flaws with different orientations are subjected to uniform
tension during measurement
———————
1
 Figures in square brackets refer to the bibliography.

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SIST EN 61747-5-3:2010
61747-5-3 © IEC:2009 – 7 –
NOTE Refer to [1] to [4] in th
...