1、Printed electronicsPart 502-1: Quality assessment Organic light emitting diode (OLED) elements Mechanical stress testing of OLED elements formed on flexible substratesBS IEC 62899-502-1:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British
2、 Standard is the UK implementation of IEC 62899-502-1:2017. The UK participation in its preparation was entrusted to TechnicalCommittee AMT/9, Printed Electronics.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to inc
3、lude all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 91286 3ICS 29.035.01; 31.260Compliance with a British Standard cannot confer immunity fromlegal obligations.
4、This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS IEC 62899-502-1:2017IEC 62899-502-1 Edition 1.0 2017-03 INTERNATIONAL STANDARD Printed electronics
5、 Part 502-1: Quality assessment Organic light emitting diode (OLED) elements Mechanical stress testing of OLED elements formed on flexible substrates INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.035.01; 31.260 ISBN 978-2-8322-4078-6 Registered trademark of the International Electrotechnical Comm
6、ission Warning! Make sure that you obtained this publication from an authorized distributor. colourinsideBS IEC 62899-502-1:2017 2 IEC 62899-502-1:2017 IEC 2017 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 3.1 General terms . 8 3.2 Terms related
7、 to optical and electrical properties 8 3.3 Terms related to mechanical stress test 9 4 Standard atmospheric condition for measurements and tests . 9 5 Evaluation methods of optical and electrical properties 9 5.1 General . 9 5.2 Sample preparation of OLED element(s) for optical and electrical measu
8、rements 9 5.3 IVL characteristics 10 5.4 Luminous flux . 10 5.5 Luminance uniformity 10 6 Mechanical stress test methods . 10 6.1 General . 10 6.2 Bending test 10 6.2.1 General . 10 6.2.2 Testing apparatus 10 6.2.3 Testing procedure 10 6.2.4 Evaluation . 11 6.2.5 Testing conditions . 11 6.3 Rolling
9、test 12 6.3.1 General . 12 6.3.2 Testing apparatus 12 6.3.3 Testing procedure 12 6.3.4 Evaluation . 13 6.3.5 Testing conditions . 13 6.4 Torsion test . 14 6.4.1 General . 14 6.4.2 Testing apparatus 14 6.4.3 Testing procedure 14 6.4.4 Evaluation . 15 6.4.5 Testing conditions . 15 6.5 Tension test 16
10、6.5.1 General . 16 6.5.2 Testing apparatus 16 6.5.3 Testing procedure 16 6.5.4 Evaluation . 16 6.5.5 Testing conditions . 16 7 Failure criteria . 17 Annex A (normative) Measurement methods of IVL characteristics 18 A.1 General . 18 A.2 Measurement method . 18 BS IEC 62899-502-1:2017IEC 62899-502-1:2
11、017 IEC 2017 3 A.2.1 General . 18 A.2.2 Measurement apparatus 18 A.2.3 Measurement procedure 18 A.2.4 Acceptance 18 A.2.5 Items for relevant specification 18 Annex B (normative) Measurement methods of luminous flux . 20 B.1 General . 20 B.2 Measurement method . 20 B.2.1 General . 20 B.2.2 Measuremen
12、t apparatus 20 B.2.3 Measurement procedure 21 B.2.4 Acceptance 22 B.2.5 Terms for additional definition 22 Figure 1 Apparatus for bending test . 12 Figure 2 Apparatus for rolling test 13 Figure 3 Apparatus for torsion test . 15 Figure 4 Example of sample alignment for torsion testing . 15 Figure 5 A
13、pparatus for tension test 17 Figure A.1 Layout of luminous measurement system 19 Figure B.1 Example of measurement apparatus for luminous flux using an integral sphere 21 BS IEC 62899-502-1:2017 4 IEC 62899-502-1:2017 IEC 2017 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PRINTED ELECTRONICS Part 502-
14、1: Quality assessment Organic light emitting diode (OLED) elements Mechanical stress testing of OLED elements formed on flexible substrates FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committ
15、ees (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 R
16、eports, 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 an
17、d 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 agreemen
18、ts 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
19、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 in
20、ternational 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 i
21、n 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 u
22、sers 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 o
23、ther 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
24、. 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 pat
25、ent rights. International Standard IEC 62899-502-1 has been prepared by IEC technical committee 119: Printed electronics. The text of this International Standard is based on the following documents: FDIS Report on voting 119/138/FDIS 119/148/RVD Full information on the voting for the approval of thi
26、s 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. BS IEC 62899-502-1:2017IEC 62899-502-1:2017 IEC 2017 5 A list of all parts in the IEC 62899 series, published under the genera
27、l title Printed electronics, can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the documen
28、t will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the corr
29、ect understanding of its contents. Users should therefore print this document using a colour printer. BS IEC 62899-502-1:2017 6 IEC 62899-502-1:2017 IEC 2017 INTRODUCTION In contrast to existing lighting tiles formed on heavy and rigid substrates, printed flexible organic light emitting diodes (OLED
30、) are expected to be thin and light-weight, and to be used as flexible lighting elements for emerging applications such as newly designed lighting for, architecture, automobile, aircraft and so on. It is highly beneficial to standardize quality assessment methods of printed flexible OLED elements fo
31、r both manufacturers and users at an early stage of the growing market for the devices. In addition, the standardization helps to settle the contents for the technological development. The standardization of testing conditions for mechanical stress is very much expected to evaluate the printed flexi
32、ble OLED elements and to accelerate the expansion of the printed electronics (PE) market opportunities for flexible device applications. This document defines testing conditions for mechanical stress, in the form of curving, rolling, and/or folding on printed flexible OLED elements. The mechanical s
33、tresses for the test are applied as specific forms under defined conditions, which depend on the specific applications including rigidly fixed lighting for the printed flexible OLED elements. This document also defines coexisting environmental conditions such as temperature, humidity and air pressur
34、e. This document includes evaluation methods of optical and electrical properties for the performance change induced by the stress test on the printed flexible OLED elements. BS IEC 62899-502-1:2017IEC 62899-502-1:2017 IEC 2017 7 PRINTED ELECTRONICS Part 502-1: Quality assessment Organic light emitt
35、ing diode (OLED) elements Mechanical stress testing of OLED elements formed on flexible substrates 1 Scope This part of IEC 62899 specifies the quality assessment methods, especially the mechanical stress test methods, for reliability assessment. This document is applicable to flexible OLED elements
36、 formed on flexible substrates by printed electronics technology excluding those OLED products, which are intended to be used for lighting purposes. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of
37、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 62715-6-1, Flexible display devices Part 6-1: Mechanical stress test methods IEC 62341-5:2009, Organic light emitting dio
38、de (OLED) displays Part 5: Environmental testing methods IEC 62341-6-1, Organic light emitting diode (OLED) displays Part 6-1: Measuring methods of optical and electro-optical parameters IEC 62595-2-1:2016, Display lighting unit Part 2-1: Electro-optical measurement methods of LED backlight unit IEC
39、 62922, Organic light emitting diode (OLED) panels for general lighting Performance requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 62922 and IEC 62715-6-1, and the following apply. ISO and IEC maintain terminological databases for use i
40、n standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp. BS IEC 62899-502-1:2017 8 IEC 62899-502-1:2017 IEC 2017 3.1 General terms 3.1.1 OLED element light emitting element formed with a
41、t least one light emitting organic semiconductor film layered with an anode electrode and a cathode electrode and classified into two categories, lighting and display Note 1 to entry: For display usage, printed OLED elements are applicable for back-lighting, etc. 3.1.2 printed OLED element light emi
42、tting element formed with at least one printed layer in OLED structure, where the printed layer is selected from an anode electrode, hole injection layer, hole transport layer, light emitting layer, electron transport layer, electron injection layer, charge generation layer, cathode electrode, passi
43、vation layer, smoothing layer, etc. 3.1.3 flexible substrate substrate with flexibility on which a flexible light emitting element is attached such as plastic film, thin glass, metal foil, paper, or cloth 3.1.4 flexibility mechanically bendable property upon stress, which is restored to its original
44、 state after removal of the stress and which is deformed from its initial state 3.1.5 flexible OLED element mechanically bendable element in at least one step among substrate handling, manufacturing storage, use, operation, shipping and relocation 3.2 Terms related to optical and electrical properti
45、es 3.2.1 IVL characteristics correlation between electric power, product of current (I) and voltage (V), applied to the OLED element with a defined electrical condition and light flux (L) emitted from the OLED element 3.2.2 luminous flux total flux from the light source Note 1 to entry: This is expr
46、essed as lumen (lm). 3.2.3 maintenance of luminous flux changes in the luminous flux of the OLED element for driving and/or storage to the initial luminous flux 3.2.4 luminance uniformity qualifying value of the distribution of luminance on OLED element(s) luminance uniformity or non-uniformity of t
47、he OLED element is evaluated as defined in IEC 62595-2-1:2016 BS IEC 62899-502-1:2017IEC 62899-502-1:2017 IEC 2017 9 3.3 Terms related to mechanical stress test 3.3.1 bending test deformation caused by external stress in the perpendicular direction on the flat plane of the OLED element 3.3.2 rolling
48、 test deformation caused by external stress which forms a rolledl shape from a flat shape, on at least one area of the front-side surface facing the back-side surface of the OLED element 3.3.3 torsion test deformation which twists the OLED element plane, pulling each edge in different directions 3.3
49、.4 tension test pulling force applied to at least one direction of the OLED element along the plane 4 Standard atmospheric condition for measurements and tests Standard atmospheric conditions defined in IEC 62341-5:2009, 5.3, shall apply. 5 Evaluation methods of optical and electrical properties 5.1 General Both before and after mechanical stress testing in Clause 6, the following measurements on the electrical and optical characteristics of OLED element(s) sh
