1、 IEC 61747-40-1 Edition 1.0 2013-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Liquid crystal display devices Part 40-1: Mechanical testing of display cover glass for mobile devices Guidelines Dispositifs daffichage cristaux liquides Partie 40-1: Essais mcaniques des verres protecteurs des affichag
2、es pour les dispositifs mobiles Lignes directrices IEC61747-40-1:2013 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 IEC, Geneva, Switzerland 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
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16、s: csciec.ch. IEC 61747-40-1 Edition 1.0 2013-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Liquid crystal display devices Part 40-1: Mechanical testing of display cover glass for mobile devices Guidelines Dispositifs daffichage cristaux liquides Partie 40-1: Essais mcaniques des verres protecteurs
17、 des affichages pour les dispositifs mobiles Lignes directrices INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE K ICS 31.120 PRICE CODE CODE PRIX ISBN 978-2-83220-862-5 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commi
18、ssion Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61747-40-1 IEC:2013 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Term
19、s and definitions . 6 3 Mechanical performance testing guidelines 7 3.1 General . 7 3.2 Mechanical testing guidelines for display cover glass for mobile devices . 8 4 Brief overview of mechanical test methods . 8 Bibliography 10 Table 1 Mechanical attributes and measurement methods . 8 61747-40-1 IE
20、C:2013 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ LIQUID CRYSTAL DISPLAY DEVICES Part 40-1: Mechanical testing of display cover glass for mobile devices Guidelines FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all nation
21、al 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
22、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. Int
23、ernational, 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 f
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28、tification bodies. 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 i
29、njury, 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 reference
30、s 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 iden
31、tifying any or all such patent rights. International Standard IEC 61747-40-1 has been prepared by IEC technical committee 110: Electronic display devices. The text of this standard is based on the following documents: FDIS Report on voting 110/464/FDIS 110/476/RVD Full information on the voting for
32、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. 4 61747-40-1 IEC:2013 A list of all the parts in the IEC 61747 series, under the general title Liquid crystal display
33、devices, can be found on the IEC website. 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. The committee has decided that the contents of this publication will remain unchange
34、d until the stability 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. 61747-40-1 IEC:2013 5 INTRODUCTION Mobile electronic device
35、s have become increasingly sophisticated and often incorporate displays for the purposes of user interface and viewing. Such displays commonly incorporate a transparent cover glass which aids in protecting the display against the introduction of damage through routine device transport and use, as we
36、ll as occasional or accidental misuse. The purpose of this standard is to provide mechanical testing guidelines for cover glasses utilized in such applications. Such glasses may or may not be strengthened, for example via an ion-exchange process, which acts to increase mechanical strength through th
37、e introduction of a surface compressive layer. It is assumed that all measurements described in detail in individual test method standards are performed by personnel skilled in the general art of mechanical property measurements. Furthermore, it should be assured that all equipment is suitably calib
38、rated as is known to skilled personnel and that records of the calibration data and traceability are kept. 6 61747-40-1 IEC:2013 LIQUID CRYSTAL DISPLAY DEVICES Part 40-1: Mechanical testing of display cover glass for mobile devices Guidelines 1 Scope This part of IEC 61747 is a mechanical performanc
39、e testing guideline for cover glass used in electronic flat panel displays in mobile devices. This document focuses on key mechanical testing performance parameters and covers mainly strength and damage resistance attributes. The test methods will focus on the cover glass level testing only. NOTE Th
40、e glass used for cover glasses for electronic mobile devices can be chemically strengthened by an ion-exchange process. This ion exchange process increases the mechanical strength of the glass. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1
41、abraded subjected to a defined process which introduces mechanical abrasive damage to a portion of the specimen to be placed under tension during subsequent flexural strength testing, for example, biaxial flexure via ring-on-ring 2.2 as-received representative of standard sample preparation and hand
42、ling practices, and therefore free of intentional mechanical damage such as abrasion, scratching, or indentation Note 1 to entry: The strength of glass is not an intrinsic material property, and like other brittle elastic materials, is highly dependent upon the surface flaw population. The term “as-
43、received” is meant to represent the surface condition upon specimen receipt and should be distinguished from a condition where damage has been intentionally introduced prior to testing. 2.3 central tension CT tensile stress generated within the interior of a glass article which serves to counteract
44、i.e., force balance) compressive stress acting at or near the article surface Note 1 to entry: This note applies to the French language only. 2.4 chemically strengthened subjected to a molten salt bath containing alkali ions typically larger than those residing in the glass, resulting in the genera
45、tion of residual compressive stress (2.5) and central tension (2.3) 2.5 compressive stress CS maximum residual stress in compression measured near the glass surface Note 1 to entry: This note applies to the French language only. 61747-40-1 IEC:2013 7 2.6 cover glass cover lens glass that typically p
46、rotects an optical component such as a display from damage 2.7 damage resistance ability to resist certain potential damage-inducing events such as abrasion, indentation or scratching 2.8 depth of layer DOL distance from the surface of a strengthened glass to the depth of zero stress or the depth of
47、 transition from compressive to tensile stress Note 1 to entry: The ability to approximate this depth is dependent upon the measurement methodology chosen. Note 2 to entry: This note applies to the French language only. 2.9 edge strength measured stress at failure in the case where failure is known
48、to have originated from a specimen edge 2.10 mobile device electronic device that includes a battery and is designed to be carried about by consumers 2.11 retained surface strength abraded surface strength measured stress at failure in the case where failure is known to have originated from a specim
49、en surface which has experienced a prescribed abrasion or mechanical damage event 2.12 strength stress at which a specimen fails for a given loading condition 2.13 thermally strengthened subjected to fast cooling of the glass exterior relative to the glass interior, resulting in the generation of residual compressive stress (2.5) and central tension (2.3) 3 Mechanical performance testing guidelines 3.1 General The appropriate a
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