BS EN 62341-5-2:2013
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Organic light emitting diode (OLED) displays – Mechanical endurance testing methods
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 32 |
This part of IEC 62341 defines testing methods for evaluating mechanical endurance quality of Organic Light Emitting Diode (OLED) display panels and modules or their packaged form for transportation. It takes into account, wherever possible, the environmental testing methods outlined in specific parts of IEC 60068. The object of this standard is to establish uniform preferred test methods for judging the mechanical endurance properties of OLED display devices.
There are generally two categories of mechanical endurance tests: those relating to the product usage environment and those relating to the transportation environment in packaged form. Vibration, shock, quasistatic strength, four-point bending test and peel strength test are introduced here for usage environment, while transportation drop test is applicable to the transportation environment. Mechanical endurance tests may also be categorized into mobile application, notebook computer or monitor application and large size TV application. Special considerations or limitations of test methods according to the size or application of the specimen will be noted.
NOTE This standard is established separately from IEC 61747-5-3, because the technology of organic light emitting diodes is considerably different from that of liquid crystal devices in such matters as:
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used materials and structure;
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operation principles;
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measuring methods.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | English CONTENTS |
| 8 | 1 Scope 2 Normative references |
| 9 | 3 Terms and definitions 4 Abbreviations 5 Standard atmospheric conditions 6 Evaluations 6.1 Visual examination and verification of dimensions |
| 10 | 6.2 Reporting 7 Mechanical endurance test methods 7.1 General 7.2 Vibration (sinusoidal) 7.2.1 General 7.2.2 Purpose 7.2.3 Test apparatus 7.2.4 Test procedure |
| 11 | Tables Table 1 – Frequency range – Lower end Table 2 – Frequency range – Upper end |
| 12 | Table 3 – Recommended frequency ranges Table 4 – Recommended vibration amplitudes |
| 13 | 7.2.5 Evaluation 7.3 Shock 7.3.1 General 7.3.2 Purpose 7.3.3 Test apparatus 7.3.4 Test procedure Figures Figure 1 – Configuration of OLED shock test set-up |
| 14 | 7.3.5 Evaluation 7.4 Quasistatic strength 7.4.1 General 7.4.2 Purpose Table 5 – Conditions for shock test |
| 15 | 7.4.3 Specimen 7.4.4 Test apparatus 7.4.5 Test procedure Figure 2 – Schematic of quasistatic strength measurement apparatus example |
| 16 | 7.4.6 Evaluation 7.5 Four-point bending test 7.5.1 General 7.5.2 Purpose 7.5.3 Specimen |
| 17 | 7.5.4 Test apparatus 7.5.5 Test procedure Figure 3 – Schematics of test apparatus and pinned bearing edges Figure 4 – Specimen configuration under four-point bending test |
| 18 | 7.5.6 Post-testing analysis Table 6 – Examples of test parameter combinations |
| 19 | 7.5.7 Evaluation 7.6 Transportation drop test 7.6.1 General 7.6.2 Purpose 7.6.3 Test sample 7.6.4 Test procedure |
| 20 | 7.6.5 Evaluation 7.7 Peel strength test 7.7.1 Purpose 7.7.2 Test procedure Figure 5 – Order of transportation package drop Table 7 – Example of package drop sequence |
| 21 | 7.7.3 Evaluation Figure 6 – Example of peeling strength test |
| 22 | Annex A (informative) Example of the raw test data reductionfor four-point bending test Figure A.1 – Specimen dimensions used for sample test |
| 23 | Figure A.2 – Examples of test results: load-displacement curves Table A.1 – Results of raw test data |
| 24 | Figure A.3 – Finite element model of test specimen |
| 25 | Figure A.4 – Displacement contour map after moving down loading-bar by 2 mm Figure A.5 – Contour map of maximum principal stress distribution |
| 26 | Figure A.6 – Maximum principal stress and maximum stress along the edge Figure A.7 – Final relationship between panel strength and failure load |
| 27 | Figure A.8 – Extraction of conversion factor by linear fitting Table A.2 – Example of conversion factor (t = 0,4 mm, test span = 20 mm/40 mm) |
| 28 | Table A.3 – Failure load and converted strength data |
| 29 | Figure A.9 – Example of Weibull distribution of strength data and statistical outputs Figure A.10 – Fitted failure probability distribution of strength data |
| 30 | Bibliography |
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BS EN 62341-5-2:2013
Organic light emitting diode (OLED) displays – Mechanical endurance testing methods Published By Publication Date…
