1、 IEC 61747-40-2 Edition 1.0 2015-01 INTERNATIONAL STANDARD Liquid crystal display devices Part 40-2:Mechanical testing of display cover glass for mobile devices Uni-axial flexural strength(4-point bend)IEC 61747-40-2:2015-01(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC,Geneva,Switze
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10、c.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.IEC 61747-40-2 Edition 1.0 2015-01 INTERNATIONAL STANDARD Liquid crystal display devices Part 40-2:Mechanical testing of display cover glass for mobile de
11、vices Uni-axial flexural strength(4-point bend)INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.120 ISBN 978-2-8322-2210-2 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC 61747-40-2:2015 I
12、EC 2015 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references.6 3 Terms,definitions and abbreviations.6 3.1 Terms and definitions.6 3.2 Abbreviations.7 4 General.7 5 Apparatus.7 5.1 Testing environment and pre-conditioning.7 5.2 Testing frame.7 5.3 Test fixture and setup.9 5.4 Test fix
13、ture dimensions.12 5.5 Loading rate.13 6 Procedure.13 6.1 Safety.13 6.1.1 Hazard Broken glass.13 6.1.2 Crush hazard Only one person may operate the testing frame.13 6.1.3 Crush hazard Take care when installing or removing a specimen.13 6.1.4 Hazard Press the emergency stop button when an unsafe cond
14、ition is observed.14 6.1.5 Flying debris hazard Ensure that specimens are installed correctly.14 6.1.6 Hazard Protect control cables from damage or disconnection.14 6.2 Sample.14 6.3 Individual specimen.14 6.4 Complete the report.16 7 Calculations.17 7.1 Strength calculations.17 7.2 Statistical calc
15、ulations.17 8 Reporting.18 8.1 Information to be reported for each test.18 8.2 Information to be made available upon request.19 9 Specifications.19 Figure 1 Testing frame.9 Figure 2 Support assembly(side view).10 Figure 3 Support assembly(top view).10 Figure 4 Load assembly(side view).11 Figure 5 Lo
16、ad assembly(bottom view).11 Figure 6 Example load traces for appropriate and inappropriate span settings.13 Figure 7 Edge fracture originating from between the load bars.15 Figure 8 Edge fracture originating from underneath the load bar.16 Figure 9 Surface fracture originating from between the load bars.16 Figure 10 Example Weibull plot.18 IEC 61747-40-2:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ LIQUID CRYSTAL DISPLAY DEVICES Part 40-2:Mechanical testing of display cover glass
