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IEC 62341-5-2
Edition 2.0 2019-03
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –
Part 5-2: Mechanical endurance test methods
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IEC 62341-5-2
Edition 2.0 2019-03
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –
Part 5-2: Mechanical endurance test methods
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.260 ISBN 978-2-8322-6603-8
– 2 – IEC 62341-5-2:2019 © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Abbreviated terms . 7
5 Standard atmospheric conditions . 7
6 Evaluation . 7
6.1 Visual examination and verification of dimensions . 7
6.2 Reporting . 8
7 Mechanical endurance test methods . 8
7.1 General . 8
7.2 Vibration (sinusoidal) . 8
7.2.1 General . 8
7.2.2 Purpose . 8
7.2.3 Test apparatus . 8
7.2.4 Test procedure . 8
7.2.5 Evaluation . 12
7.3 Shock . 12
7.3.1 General . 12
7.3.2 Purpose . 12
7.3.3 Test apparatus . 12
7.3.4 Test procedure . 12
7.3.5 Evaluation . 13
7.4 Quasistatic strength . 13
7.4.1 General . 13
7.4.2 Purpose . 13
7.4.3 Specimen . 14
7.4.4 Test apparatus . 14
7.4.5 Test procedure . 14
7.4.6 Evaluation . 15
7.5 Four-point bending test . 15
7.5.1 General . 15
7.5.2 Purpose . 15
7.5.3 Specimen . 15
7.5.4 Test apparatus . 16
7.5.5 Test procedure . 17
7.5.6 Post-testing analysis . 17
7.5.7 Evaluation . 18
7.6 Transportation drop test . 18
7.6.1 General . 18
7.6.2 Purpose . 18
7.6.3 Test sample . 18
7.6.4 Test procedure . 18
7.6.5 Evaluation . 19
7.7 Peel strength test . 19
7.7.1 Purpose . 19
7.7.2 Test procedure . 19
7.7.3 Evaluation . 20
7.8 Shock test for large size display . 20
7.8.1 Purpose . 20
7.8.2 Test procedure . 20
Annex A (informative) Example of raw test data reduction for four-point bending test . 21
A.1 Purpose . 21
A.2 Sample test results . 21
A.3 Finite element analysis . 22
A.4 Use of conversion factor . 26
A.5 Evaluation . 27
Bibliography . 29
Figure 1 – Example of the specimen and jig . 9
Figure 2 – Directions of vibration test . 9
Figure 3 – Configuration of OLED shock test set-up . 12
Figure 4 – Schematic of quasistatic strength measurement apparatus example . 14
Figure 5 – Schematics of test apparatus and pinned bearing edges . 16
Figure 6 – Specimen configuration under four-point bending test . 16
Figure 7 – Order of transportation package drop . 19
Figure 8 – Example of peeling strength test . 20
Figure A.1 – Specimen dimensions used for sample test . 21
Figure A.2 – Examples of test results: Load-displacement curves . 22
Figure A.3 – Finite element model of test specimen . 23
Figure A.4 – Displacement contour map after moving the loading bar down by 2 mm . 24
Figure A.5 – Contour map of maximum principal stress distribution . 24
Figure A.6 – Maximum principal stress and maximum stress along the edge . 25
Figure A.7 – Final relationship between panel strength and failure load . 25
Figure A.8 – Extraction of conversion factor by linear fitting . 26
Figure A.9 – Example of Weibull distribution of strength data and statistical outputs . 28
Figure A.10 – Fitted failure probability distribution of strength data and B strength . 28
Table 1 – Frequency range – Lower end . 10
Table 2 – Frequency range – Upper end . 10
Table 3 – Recommended frequency ranges . 11
Table 4 – Recommended vibration amplitudes . 11
Table 5 – Conditions for shock test . 13
Table 6 – Examples of test parameter combinations . 17
Table 7 – Example of package drop sequence . 19
Table A.1 – Results of raw test data . 22
Table A.2 – Example of conversion factor (t = 0,4mm, test span = 20mm/40mm) . 26
Table A.3 – Failure load and converted strength data . 27
– 4 – IEC 62341-5-2:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ORGANIC LIGHT EMITTING DIODE (OLED) DISPLAYS –
Part 5-2: Mechanical endurance test methods
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 i
...