IEC 61747-5-3:2009

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

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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 978-2-88910-554-0
– 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 failure stress (parent glass) . 11
8.3 Quasistatic edge failure stress (parent glass) . 12
8.4 Quasistatic failure load (LCD module) . 12
9 Fatigue and reliability calculations . 12
9.1 General . 12
9.2 Dynamic fatigue calculation . 13
9.3 Weibull parameter calculation from dynamic failure stress data . 13
9.4 Extrapolated static fatigue and Weibull distribution 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 – Photograph and 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

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
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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.

– 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
...