IEC 62715-6-23:2024
(Main)Flexible displays devices – Part 6-23: Mechanical test methods - Mechanical misaligned folding test method
Flexible displays devices – Part 6-23: Mechanical test methods - Mechanical misaligned folding test method
IEC 62715-6-23:2024 specifies the standard measuring methods to evaluate the mechanical durability of foldable display modules, especially mechanical durability under the condition reflecting the actual usage environment.
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IEC 62715-6-23 ®
Edition 1.0 2024-12
INTERNATIONAL
STANDARD
colour
inside
Flexible displays devices –
Part 6-23: Mechanical test methods – Mechanical misaligned folding test method
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IEC 62715-6-23 ®
Edition 1.0 2024-12
INTERNATIONAL
STANDARD
colour
inside
Flexible displays devices –
Part 6-23: Mechanical test methods – Mechanical misaligned folding test method
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120 ISBN 978-2-8327-0044-0
– 2 – IEC 62715-6-23:2024 © IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Standard atmospheric conditions . 7
5 Test sample preparation . 7
5.1 General . 7
5.2 Visual inspection . 7
5.3 Sample preparation . 7
6 Mechanical test method . 8
6.1 General . 8
6.2 Purpose . 8
6.3 Test apparatus . 8
6.3.1 Cyclic folding test . 8
6.3.2 Drop test . 9
6.4 Test procedure . 10
6.4.1 Cyclic folding test . 10
6.4.2 Drop test . 11
6.5 Reporting . 12
Bibliography . 13
Figure 1 – Example of test apparatus for in-folding type sample . 8
Figure 2 – Example of test apparatus for out-folding type sample . 9
Figure 3 – Example of drop test apparatus . 9
Table 1 – Example of cyclic folding test conditions . 10
Table 2 – Example of drop test conditions . 11
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FLEXIBLE DISPLAY DEVICES –
Part 6-23: Mechanical test methods –
Mechanical misaligned folding test method
FOREWORD
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IEC 62715-6-23 has been prepared by IEC technical committee 110: Electronic displays. It is
an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
110/1702/FDIS 110/1717/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
– 4 – IEC 62715-6-23:2024 © IEC 2024
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 62715 series, published under the general title Flexible display
devices, 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 webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
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INTRODUCTION
The market for foldable panels has been growing steadily. The first foldable product which has
foldable panel was launched in 2019 as a smartphone. Since then, many other manufacturers
have released a variety of foldable smartphones. In the future, it is expected that various types
of foldable products such as smartphones, tablets or laptop computers, etc. will be released
continuously.
These foldable products would be folded and unfolded repeatedly by users. This means that as
the period of use increases, the number of times for folding and unfolding the foldable product
increases. For this reason, the mechanical robustness of the foldable panel is expected to vary
depending on the duration of use and the user style (e.g. heavy users). [1] This document will
introduce the mechanical durability test to reflect the actual usage environment. This test
method can also be an important evaluation item as much as the mechanical durability test for
the initial foldable panel state.
The example of an actual usage environment can be demonstrated in the below situation. As
mentioned earlier, when the usage time increases, the number of folding and unfolding of the
foldable product also increases. Taking smartphones as an example, users unfold the foldable
product in order to use it, then fold it again to easily hold or carry it. Users repeat this action
several times in a day: they unfold and fold foldable products repeatedly to receive calls, to
send text messages or to search the Internet. Users often drop foldable products or bump their
foldable products somewhere because they hold their smartphone almost every day.
If the users repeatedly fold and unfold the device, or if the device is subjected to shocks (such
as dropping or pressing in local area), it can cause the misaligned state of the foldable product.
In this document, the situation that can cause misalignment of the foldable product is limited to
the state of being shocked by dropping or being pressed after repeated folding and unfolding.
The test simulates all of these processes and is defined as the mechanical misaligned folding
test. Therefore, this mechanical misaligned folding test consists of a cyclic folding test and a
drop test.
This document introduces the measurement conditions and measurement methods of the
mechanical misaligned folding test method, which is an objective mechanical durability test
method that takes into consideration the actual usage environment of the foldable panel.
___________
Numbers in square brackets refer to the Bibliography.
– 6 – IEC 62715-6-23:2
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