IEC 62868-2-3:2021
(Main)Organic light emitting diode (OLED) light sources for general lighting - Safety - Part 2-3: Particular requirements - Flexible OLED tiles and panels
Organic light emitting diode (OLED) light sources for general lighting - Safety - Part 2-3: Particular requirements - Flexible OLED tiles and panels
IEC 62868-2-3:2021 specifies the safety requirements for flexible organic light emitting diode tiles and panels for use on supplies up to 120 V ripple free DC for indoor and similar general lighting purposes and designed for being bent during the manufacturing process of curved luminaires.
Sources lumineuses à diodes électroluminescentes organiques (OLED) destinées à l'éclairage général - Sécurité - Partie 2‑3: Exigences particulières - Dalles et panneaux OLED flexibles
L'IEC 62868-2-3:2021 spécifie les exigences de sécurité des dalles et panneaux à diodes électroluminescentes organiques flexibles destinés à être utilisés avec des alimentations jusqu'à 120 V en courant continu sans ondulation pour l'éclairage général intérieur ou similaire, et conçus pour être pliés pendant le processus de fabrication de luminaires incurvés.
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IEC 62868-2-3 ®
Edition 1.1 2025-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
Organic light emitting diode (OLED) light sources for general lighting – Safety –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
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IEC 62868-2-3 ®
Edition 1.1 2025-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
Organic light emitting diode (OLED) light sources for general lighting – Safety –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.140.99 ISBN 978-2-8327-0279-6
REDLINE VERSION – 2 – IEC 62868-2-3:2021+AMD1:2025 CSV
© IEC 2025
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General . 7
4.1 General requirements . 7
4.2 General test requirements . 7
5 Marking . 8
5.1 Contents and location . 8
5.2 Durability and legibility of marking . 8
6 Construction . 8
6.1 General . 8
6.2 Mechanical strength . 8
6.2.1 Requirements . 8
6.2.2 Vibration test . 9
6.2.3 Strength and impact test . 9
6.3 Internal short circuit . 10
6.4 Wireways . 10
6.5 Resistance to dust, solid objects and moisture . 10
7 Mechanical hazard . 11
8 Fault conditions . 11
8.1 General . 11
8.2 Overpower Overload condition . 11
8.3 Input stability test . 11
8.4 Overbending . 11
8.5 Excess bending cycles . 11
9 Insulation resistance and electric strength . 12
9.1 General requirements . 12
9.12 Insulation resistance . 12
9.23 Electric strength . 12
10 Thermal stress . 12
11 Creepage distances and clearances . 12
12 Resistance to heat and fire . 12
12.1 Resistance to heat . 12
12.2 Resistance to fire flame and ignition . 12
13 Photobiological safety . 12
14 Terminals . 12
15 Information for luminaire design . 12
16 Protection against accidental contact with live parts . 13
17 Screws, current-carrying parts and connections . 13
18 Resistance to corrosion . 13
19 Provisions for protective earthing. 13
Annex A (informative) Construction of flexible OLED tiles and panels . 14
Annex B (normative) Classification of flexible OLED tiles and panels . 15
© IEC 2025
Bibliography . 16
Figure A.1 – Schematic diagram of glass flexible OLED tile for lighting . 14
Figure A.2 – Schematic diagram of film flexible OLED panel for lighting . 14
Table 1 – Additional marking . 8
Table 2 – Mechanical attributes and measurement methods . 9
Table B.1 – Flexible OLED classification . 15
REDLINE VERSION – 4 – IEC 62868-2-3:2021+AMD1:2025 CSV
© IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ORGANIC LIGHT EMITTING DIODE (OLED) LIGHT
SOURCES FOR GENERAL LIGHTING – SAFETY –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
FOREWORD
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This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 62868-2-3 edition 1.1 contains the first edition (2021-10) [documents 34A/2254/FDIS
and 34A/2261/RVD] and its amendment 1 (2025-02) [documents 34A/2424/FDIS and
34A/2434/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red
text. A separate Final version with all changes accepted is available in this publication.
© IEC 2025
IEC 62868-2-3 has been prepared by subcommittee 34A: Electric light sources, of IEC technical
committee 34: Lighting. It is an International Standard.
The language used for the development of this International Standard is English.
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/standardsdev/publications.
A list of all parts in the IEC 62868 series, published under the general title Organic light emitting
diode (OLED) light sources for general lighting – Safety, can be found on the IEC website.
This International Standard is to be used in conjunction with IEC 62868-1:2020.
In this document, the following print type is used:
– compliance statements: in italic type.
The committee has decided that the contents of this document and its amendment 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.
REDLINE VERSION – 6 – IEC 62868-2-3:2021+AMD1:2025 CSV
© IEC 2025
ORGANIC LIGHT EMITTING DIODE (OLED) LIGHT
SOURCES FOR GENERAL LIGHTING – SAFETY –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
1 Scope
This part of IEC 62868 specifies the safety requirements for flexible organic light emitting diode
(OLED) tiles and panels for use on supplies up to 120 V ripple free DC for indoor and similar
general lighting purposes and designed for being bent during the manufacturing process of
curved luminaires.
NOTE The construction of flexible OLED tiles and panels is given in Annex A.
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 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 61747-40-1:2019, Liquid crystal display devices – Part 40-1: Mechanical testing of display
cover glass for mobile devices – Guidelines
IEC 62504, General lighting – Light emitting diode (LED) products and related equipment –
Terms and definitions
IEC 62715-6-3:2020, Flexible display devices – Part 6-3: Mechanical test methods – Impact
and hardness tests
IEC 62868-1:2020, Organic light emitting diode (OLED) light sources for general lighting –
Safety – Part 1: General requirements and tests
IEC 62868-1:2020/AMD1:2024
IEC TS 62972:2016, General lighting – Organic light emitting diode (OLED) products and
related equipment – Terms and definitions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62504, IEC 62868-1
and IEC TS 62972 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
flexible OLED
OLED that is mechanically bendable in one or more of the steps of substrate handling,
manufacturing, storage, use, operation, shipping, and relocation
© IEC 2025
3.2
flexible OLED tile
smallest functional flexible OLED which cannot be separated into smaller flexible OLED lighting
elements containing at least one contact ledge with at least one positive and one negative pole
for connection to the electrical power supply
3.3
flexible OLED panel
independently operable unit flexible OLED product light source containing a flexible OLED tile
and means of connection to the electrical supply such as a connector, printed circuit board
(PCB), passive electronic components and optionally a frame
3.4
glass-based flexible OLED
flexible OLED light source having a substrate and/or encapsulation material that are composed
of thin glass
3.5
film-based flexible OLED
flexible OLED light source having components that are made of either barrier film or metal foil
3.6
barrier film
film that keeps water vapour out of an OLED light source
3.7
minimum bending radius
limit radius to which the flexible OLED panel may be bent in either a convex or
concave curvature without damaging the panel
3.8
maximum bending cycle
maximum number of times a flexible OLED panel may be bent without damaging
the panel
3.9
as-received
representative of standard sample preparation and handling 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-received" is meant to represent the surface
condition upon specimen receipt and is distinguished from a condition where damage has been intentionally
introduced prior to testing.
[SOURCE: IEC 61747-40-1:2019, 3.2]
4 General
4.1 General requirements
The requirements of IEC 62868-1:2020 and IEC 62868-1:2020/AMD1:2024, 4.1 apply.
4.2 General test requirements
The requirements of IEC 62868-1:2020, 4.2 and IEC 62868-1:2020/AMD1:2024, 4.2 apply.
The ambient temperature and mounting requirements of IEC 62868-1:2020, 4.2 and
IEC 62868-1:2020/AMD1:2024, 4.2 apply.
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© IEC 2025
The tests shall be carried out using a flexible OLED panel bent with the minimum bending radius
specified by the manufacturer. For those flexible panels which are specified for a specific
curvature, the test shall be conducted using the shape and condition specified by the
manufacturer in the installation instructions.
The tests shall be conducted at the design voltage or current, unless otherwise specified in this
document.
For those flexible panels which are specified for a specific curvature, the test shall be conducted
using the shape and condition specified by the manufacturer in the installation instructions.
Stabilization shall be conducted in the same conditions and position, for example the position
and (e.g., flat or bent), as in the tests.
5 Marking
5.1 Contents and location
The requirements of IEC 62868-1:2020, 5.1 apply. IEC 62868-1:2020, Table 1 applies together
with Table 1 of this document.
Table 1 – Additional marking
Packaging or product
Parameters Product
datasheet or leaflet
a
Mandatory
Flexible OLED classification
b
Mandatory
Minimum bending radius
(safety)
b
Mandatory
Maximum bending cycles
(safety)
a
See Table B.1 for flexible OLED classification.
b
These values can be different from those of the performance.
5.2 Durability and legibility of marking
The requirements of IEC 62868-1:2020 and IEC 62868-1:2020/AMD1:2024, 5.2 apply.
6 Construction
6.1 General
The requirements of IEC 62868-1:2020, 6.1 apply.
The construction of flexible OLED tiles and panels is illustrated in Annex A.
6.2 Mechanical strength
6.2.1 Requirements
The OLED panel shall have sufficient mechanical strength which shall be checked by 6.2.2 and
6.2.3.
© IEC 2025
6.2.2 Vibration test
Compliance is checked by carrying out the test in accordance with IEC 62868-1:2020, 6.2 and
IEC 62868-1:2020/AMD1:2024, 6.2.
Electrical contacts which could not be touched before the vibration test (e.g. those in flexible
OLED panels according to Figure A.1 and Figure A.2) shall not have become accessible after
the test.
6.2.3 Strength and impact test
The strength and impact test shall be conducted depending on the classification of the OLED
panel (see Annex B and Table B.1).
a) Glass-based flexible OLED product light source
The strength and impact test shall be conducted according to Table 2, in accordance with
IEC 61747-40-1:2019, 5.1, 5.2 and 5.4.
Test (1) shall be conducted if the edges of bare panels are exposed after installation in the
luminaire. As long as the panel is installed into the luminaire and no edge has been exposed,
this test is not mandatory.
Where no glass edge is exposed, such as being installed into a luminaire or being covered with
protecting films, tests (2) and (3) shall be conducted.
Where no glass surface is exposed, such as being installed into a luminaire or being covered
with protecting films, tests (1) and (2) shall be conducted.
Table 2 – Mechanical attributes and measurement methods
Test Failure Failure Subject Attribute Test method Unit Corresponding
location mechanism (typical) document
(1) Edge Overstress As-received Edge Uniaxial MPa IEC 61747-40-2
of edge glass strength flexure
flaws strength
(four-point
bend)
(2) Surface Overstress As-received Surface Biaxial J IEC 61747-40-3
from blunt glass impact flexure
impact resistance energy-to-
failure (ball
drop)
(3) Surface Overstress As-received Surface Biaxial N IEC 61747-40-4
of surface glass strength flexure stress
flaws (ring-on-ring)
Sharp contact J IEC 61747-40-5
(4) Surface Sharp As-received Resistance
contact glass against impact under
damage surface rigid support
introduction sharp condition
propagated contact (ball drop on
by central damage and coated
tension propagation abrasives)
under rigid under rigid
support support
condition condition
REDLINE VERSION – 10 – IEC 62868-2-3:2021+AMD1:2025 CSV
© IEC 2025
(5) Surface Sharp Abraded glass Retained Abraded N IEC 61747-40-6
contact strength biaxial
damage in flexural
combination strength
with or (abraded
followed ring-on-ring)
immediately
by flexural
stress
NOTE This table is reproduced from IEC 61747-40-1:2019, Table 1.
Compliance:
Compliance is checked by carrying out the following tests specified in Table 2.
After each test, the OLED panel is checked by inspection. As the inside of the panel might have
been damaged, conducting fault condition check is desirable. Fault condition is checked in
accordance with 8.1. The OLED product light source shall be deemed to have failed the test if:
• any of the glass is splintered or broken,
• fire, smoke or flammable gas is produced,
• there are any loosened parts which could impair safety.
b) Film-based flexible OLED panel
Impact testing for film-based flexible OLED panels shall be carried out by the following tests, in
accordance with IEC 62715-6-3:2020, 6.2 to 6.5:
• ball drop test;
• hitting test;
• pendulum side impact test;
• scratch and abrasion test.
Compliance:
After the tests, the OLED panel shall be checked by inspection. As the inside of the panel might
have been damaged, conducting a fault condition check is desirable. Fault condition is checked
in accordance with 8.1. The OLED panel shall be deemed to have failed the test if:
• fire, smoke or flammable gas is produced,
• there are any loosened parts which could impair safety.
6.3 Internal short circuit
The requirements of IEC 62868-1:2020, 6.3 apply.
6.4 Wireways
The requirements of IEC 62868-1:2020, 6.4 apply.
6.5 Resistance to dust, solid objects and moisture
The requirements of IEC 62868-1:2020, 6.5 apply.
© IEC 2025
7 Mechanical hazard
The requirements of IEC 62868-1:2020, Clause 7 apply.
8 Fault conditions
8.1 General
An OLED panel shall not impair safety under fault conditions that may occur during the intended
use.
Fault condition tests shall be conducted at an ambient temperature of (25 ± 5) °C unless
otherwise specified by the manufacturer or responsible vendor. The temperature shall be
maintained within ±2 °C during the test.
The requirements of IEC 62868-1:2020/AMD1:2024, 8.1 apply.
8.2 Overpower Overload condition
The requirements and compliance provisions of IEC 62868-1:2020/AMD1:2024, 8.2 apply.
8.3 Input stability test
The flexible OLED panel shall be operated with the rated current. The input power and voltage
shall be monitored at the input side. The test shall be continued for 15 min.
Compliance:
The voltage shall remain within the range of the rated voltage ±10 % during the test.
The requirements and compliance provisions of IEC 62868-1:2020/AMD1:2024, 8.3 apply.
8.4 Overbending
Overbending tests shall be conducted under a bending radius 70 % smaller than the minimum
bending radius specified by the manufacturer.
Compliance:
After the test, the OLED panel is checked by inspection. Any splintered or broken glass is not
accepted (for glass-based flexible OLED panel). Fire, smoke or flammable gas shall not be
produced. The OLED panel shall have no loosened parts which could impair safety.
8.5 Excess bending cycles
The OLED product light source shall be repeatedly bent for at least 1,5 times of the maximum
bending cycles.
Compliance:
After the test, the OLED panel is checked by inspection. The glass-based flexible OLED panel
shall not have any splintered or broken glass. Fire, smoke or flammable gas shall not be
produced. The OLED panel shall have no loosened parts which could impair safety.
REDLINE VERSION – 12 – IEC 62868-2-3:2021+AMD1:2025 CSV
© IEC 2025
9 Insulation resistance and electric strength
9.1 General requirements
The requirements of IEC 62868-1:2020/AMD1:2024, 9.1 apply.
9.19.2 Insulation resistance
The requirements of IEC 62868-1:2020/AMD1:2024, 9.12 apply.
9.29.3 Electric strength
The requirements of IEC 62868-1:2020/AMD1:2024, 9.23 apply.
10 Thermal stress
The requirements of IEC 62868-1:2020, Clause 10 apply.
11 Creepage distances and clearances
The requirements of IEC 62868-1:2020, Clause 11 and IEC 62868-1:2020/AMD1:2024,
Clause 11 apply.
12 Resistance to heat and fire
12.1 Resistance to heat
The requirements of IEC 62868-1:2020, 12.1 apply.
12.2 Resistance to fire flame and ignition
The requirements of IEC 62868-1:2020, 12.2 and IEC 62868-1:2020/AMD1:2024, 12.2 apply.
13 Photobiological safety
OLED products are not expected to reach a level of UV, infrared or blue light hazard that
requires marking or measurement.
The requirements of IEC 62868-1:2020, Clause 13 and IEC 62868-1:2020/AMD1:2024,
Clause 13 apply.
14 Terminals
The requirements of IEC 62868-1:2020, Clause 14 and IEC 62868-1:2020/AMD1:2024,
Clause 14 apply.
15 Information for luminaire design
Information for luminaire design is given in IEC 62868-1:2020, Annex B and
IEC 62868-1:2020/AMD1:2024, Annex B.
© IEC 2025
16 Protection against accidental contact with live parts
The requirements of IEC 62868-1:2020/AMD1:2024, Clause 16 apply.
17 Screws, current-carrying parts and connections
The requirements of IEC 62868-1:2020/AMD1:2024, Clause 17 apply.
18 Resistance to corrosion
The requirements of IEC 62868-1:2020/AMD1:2024, Clause 18 apply.
19 Provisions for protective earthing
The requirements of IEC 62868-1:2020/AMD1:2024, Clause 19 apply.
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© IEC 2025
Annex A
(informative)
Construction of flexible OLED tiles and panels
Figure A.1 and Figure A.2 provide schematic diagrams of glass-based flexible OLED tiles and
panels.
NOTE The diagram on the left represents the front view while that on the right gives the rear view. The OLED tile
is the most elementary OLED panel consisting of a substrate, encapsulation, OLED stack and metal ledge without a
printed circuit board (PCB), electrical connec
...
IEC 62868-2-3 ®
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Organic light emitting diode (OLED) light sources for general lighting – Safety –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
Sources lumineuses à diodes électroluminescentes organiques (OLED)
destinées à l'éclairage général – Sécurité –
Partie 2-3: Exigences particulières – Dalles et panneaux OLED flexibles
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IEC 62868-2-3 ®
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Organic light emitting diode (OLED) light sources for general lighting – Safety –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
Sources lumineuses à diodes électroluminescentes organiques (OLED)
destinées à l'éclairage général – Sécurité –
Partie 2-3: Exigences particulières – Dalles et panneaux OLED flexibles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.99 ISBN 978-2-8322-1036-2
– 2 – IEC 62868-2-3:2021 © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General . 7
4.1 General requirements . 7
4.2 General test requirements . 7
5 Marking . 8
5.1 Contents and location . 8
5.2 Durability and legibility of marking . 8
6 Construction . 8
6.1 General . 8
6.2 Mechanical strength . 8
6.2.1 Requirements . 8
6.2.2 Vibration test . 8
6.2.3 Strength and impact test . 9
6.3 Internal short circuit . 10
6.4 Wireways . 10
6.5 Resistance to dust, solid objects and moisture . 10
7 Mechanical hazard . 10
8 Fault conditions . 10
8.1 General . 10
8.2 Overpower condition . 11
8.3 Input stability test . 11
8.4 Overbending . 11
8.5 Excess bending cycles . 11
9 Insulation resistance and electric strength . 11
9.1 Insulation resistance . 11
9.2 Electric strength . 11
10 Thermal stress . 11
11 Creepage distances and clearances . 11
12 Resistance to heat and fire . 12
12.1 Resistance to heat . 12
12.2 Resistance to fire . 12
13 Photobiological safety . 12
14 Terminals . 12
15 Information for luminaire design . 12
Annex A (informative) Construction of flexible OLED tiles and panels . 13
Annex B (normative) Classification of flexible OLED tiles and panels . 14
Bibliography . 15
Figure A.1 – Schematic diagram of glass flexible OLED tile for lighting . 13
Figure A.2 – Schematic diagram of film flexible OLED panel for lighting . 13
Table 1 – Additional marking . 8
Table 2 – Mechanical attributes and measurement methods . 9
Table B.1 – Flexible OLED classification . 14
– 4 – IEC 62868-2-3:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ORGANIC LIGHT EMITTING DIODE (OLED) LIGHT
SOURCES FOR GENERAL LIGHTING – SAFETY –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
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 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 agreements 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 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 international 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 in 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 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 injury, 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 references 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 identifying any or all such patent rights.
IEC 62868-2-3 has been prepared by subcommittee 34A: Electric light sources, of IEC technical
committee 34: Lighting. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
34A/2254/FDIS 34A/2261/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.
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/standardsdev/publications.
A list of all parts in the IEC 62868 series, published under the general title Organic light emitting
diode (OLED) light sources for general lighting – Safety, can be found on the IEC website.
This International Standard is to be used in conjunction with IEC 62868-1:2020.
In this document, the following print type is used:
– compliance statements: in italic type.
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,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
– 6 – IEC 62868-2-3:2021 © IEC 2021
ORGANIC LIGHT EMITTING DIODE (OLED) LIGHT
SOURCES FOR GENERAL LIGHTING – SAFETY –
Part 2-3: Particular requirements – Flexible OLED tiles and panels
1 Scope
This part of IEC 62868 specifies the safety requirements for flexible organic light emitting diode
tiles and panels for use on supplies up to 120 V ripple free DC for indoor and similar general
lighting purposes and designed for being bent during the manufacturing process of curved
luminaires.
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 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 61747-40-1:2019, Liquid crystal display devices – Part 40-1: Mechanical testing of display
cover glass for mobile devices – Guidelines
IEC 62504, General lighting – Light emitting diode (LED) products and related equipment –
Terms and definitions
IEC 62715-6-3:2020, Flexible display devices – Part 6-3: Mechanical test methods – Impact
and hardness tests
IEC 62868-1:2020, Organic light emitting diode (OLED) light sources for general lighting –
Safety – Part 1: General requirements and tests
IEC TS 62972:2016, General lighting – Organic light emitting diode (OLED) products and
related equipment – Terms and definitions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62504, IEC 62868-1
and IEC TS 62972 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
flexible OLED
OLED that is mechanically bendable in one or more of the steps of substrate handling,
manufacturing, storage, use, operation, shipping, and relocation
3.2
flexible OLED tile
smallest functional flexible OLED which cannot be separated into smaller flexible OLED lighting
elements containing at least one contact ledge with at least one positive and one negative pole
for connection to the electrical power supply
3.3
flexible OLED panel
independently operable unit flexible OLED product containing a flexible OLED tile and means
of connection to the electrical supply such as a connector, printed circuit board (PCB), passive
electronic components and optionally a frame
3.4
glass-based flexible OLED
flexible OLED light source having a substrate and/or encapsulation material that are composed
of thin glass
3.5
film-based flexible OLED
flexible OLED light source having components that are made of either barrier film or metal foil
3.6
barrier film
film that keeps water vapour out of an OLED light source
3.7
minimum bending radius
limit radius to which the flexible panel may be bent in either a convex or concave
curvature without damaging the panel
3.8
maximum bending cycle
maximum number of times a flexible panel may be bent without damaging the panel
3.9
as-received
representative of standard sample preparation and handling 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-received" is meant to represent the surface
condition upon specimen receipt and is distinguished from a condition where damage has been intentionally
introduced prior to testing.
[SOURCE: IEC 61747-40-1:2019, 3.2]
4 General
4.1 General requirements
The requirements of IEC 62868-1:2020, 4.1 apply.
4.2 General test requirements
The requirements of IEC 62868-1:2020, 4.2 apply.
– 8 – IEC 62868-2-3:2021 © IEC 2021
The tests shall be carried out using a flexible OLED panel bent with the minimum bending radius
specified by the manufacturer. For those flexible panels which are specified for a specific
curvature, the test shall be conducted using the shape and condition specified by the
manufacturer in the installation instructions.
Stabilization shall be conducted in the same conditions, for example the position and flat or
bent, as the tests.
5 Marking
5.1 Contents and location
The requirements of IEC 62868-1:2020, 5.1 apply. IEC 62868-1:2020, Table 1 applies together
with Table 1 of this document.
Table 1 – Additional marking
Packaging
Parameters Product or
product datasheet or leaflet
a
Mandatory
Flexible OLED classification
b
Mandatory
Minimum bending radius
b
Mandatory
Maximum bending cycles
a
See Table B.1 for flexible OLED classification.
b
These values can be different from those of the performance.
5.2 Durability and legibility of marking
The requirements of IEC 62868-1:2020, 5.2 apply.
6 Construction
6.1 General
The requirements of IEC 62868-1:2020, 6.1 apply.
The construction of flexible OLED tiles and panels is illustrated in Annex A.
6.2 Mechanical strength
6.2.1 Requirements
The OLED panel shall have sufficient mechanical strength which shall be checked by 6.2.2 and
6.2.3.
6.2.2 Vibration test
Compliance is checked by carrying out the test in accordance with IEC 62868-1:2020, 6.2.
6.2.3 Strength and impact test
The strength and impact test shall be conducted depending on the classification of the OLED
panel (see Annex B and Table B.1).
a) Glass-based flexible OLED product
The strength and impact test shall be conducted according to Table 2, in accordance with
IEC 61747-40-1:2019, 5.1, 5.2 and 5.4.
Test (1) shall be conducted if the edges of bare panels are exposed after installation in the
luminaire. As long as the panel is installed into the luminaire and no edge has been exposed,
this test is not mandatory.
Where no glass edge is exposed, such as being installed into a luminaire or being covered with
protecting films, tests (2) and (3) shall be conducted.
Where no glass surface is exposed, such as being installed into a luminaire or being covered
with protecting films, tests (1) and (2) shall be conducted.
Table 2 – Mechanical attributes and measurement methods
Test Failure Failure Subject Attribute Test method Unit Corresponding
location mechanism (typical) document
(1) Edge Overstress As-received Edge Uniaxial MPa IEC 61747-40-2
of edge glass strength flexure
flaws strength
(four-point
bend)
(2) Surface Overstress As-received Surface Biaxial J IEC 61747-40-3
from blunt glass impact flexure
impact resistance energy-to-
failure (ball
drop)
(3) Surface Overstress As-received Surface Biaxial N IEC 61747-40-4
of surface glass strength flexure stress
flaws (ring-on-ring)
Sharp As-received Resistance Sharp contact
(4) Surface J IEC 61747-40-5
contact glass against impact under
damage surface rigid support
introduction sharp condition
propagated contact (ball drop on
coated
by central damage and
tension propagation abrasives)
under rigid under rigid
support support
condition condition
(5) Surface Sharp Abraded glass Retained Abraded N IEC 61747-40-6
contact strength biaxial
damage in flexural
combination strength
with or (abraded
followed ring-on-ring)
immediately
by flexural
stress
NOTE This table is reproduced from IEC 61747-40-1:2019, Table 1.
– 10 – IEC 62868-2-3:2021 © IEC 2021
Compliance:
Compliance is checked by carrying out the following tests specified in Table 2.
After each test, the OLED panel is checked by inspection. As the inside of the panel might have
been damaged, conducting fault condition check is desirable. Fault condition is checked in
accordance with 8.1. The OLED product shall be deemed to have failed the test if:
• any of the glass is splintered or broken,
• fire, smoke or flammable gas is produced,
• there are any loosened parts which could impair safety.
b) Film-based flexible OLED panel
Impact testing for film-based flexible OLED panels shall be carried out by the following tests, in
accordance with IEC 62715-6-3:2020, 6.2 to 6.5:
• ball drop test;
• hitting test;
• pendulum side impact test;
• scratch and abrasion test.
Compliance:
After the tests, the OLED panel shall be checked by inspection. As the inside of the panel might
have been damaged, conducting a fault condition check is desirable. Fault condition is checked
in accordance with 8.1. The OLED panel shall be deemed to have failed the test if:
• fire, smoke or flammable gas is produced,
• there are any loosened parts which could impair safety.
6.3 Internal short circuit
The requirements of IEC 62868-1:2020, 6.3 apply.
6.4 Wireways
The requirements of IEC 62868-1:2020, 6.4 apply.
6.5 Resistance to dust, solid objects and moisture
The requirements of IEC 62868-1:2020, 6.5 apply.
7 Mechanical hazard
The requirements of IEC 62868-1:2020, Clause 7 apply.
8 Fault conditions
8.1 General
An OLED panel shall not impair safety under fault conditions that may occur during the intended
use.
Fault condition tests shall be conducted at an ambient temperature of (25 ± 5) °C unless
otherwise specified by the manufacturer or responsible vendor. The temperature shall be
maintained within ±2 °C during the test.
8.2 Overpower condition
The requirements and compliance of IEC 62868-1:2020, Clause 8 apply.
8.3 Input stability test
The flexible OLED panel shall be operated with the rated current. The input power and voltage
shall be monitored at the input side. The test shall be continued for 15 min.
Compliance:
The voltage shall remain within the range of the rated voltage ±10 % during the test.
8.4 Overbending
Overbending tests shall be conducted under a bending radius 70 % smaller than the minimum
bending radius specified by the manufacturer.
Compliance:
After the test, the OLED panel is checked by inspection. Any splintered or broken glass is not
accepted (for glass-based flexible OLED panel). Fire, smoke or flammable gas shall not be
produced. The OLED panel shall have no loosened parts which could impair safety.
8.5 Excess bending cycles
The OLED product shall be repeatedly bent for at least 1,5 times of the maximum bending
cycles.
Compliance:
After the test, the OLED panel is checked by inspection. The glass-based flexible OLED panel
shall not have any splintered or broken glass. Fire, smoke or flammable gas shall not be
produced. The OLED panel shall have no loosened parts which could impair safety.
9 Insulation resistance and electric strength
9.1 Insulation resistance
The requirements of IEC 62868-1:2020, 9.1 apply.
9.2 Electric strength
The requirements of IEC 62868-1:2020, 9.2 apply.
10 Thermal stress
The requirements of IEC 62868-1:2020, Clause 10 apply.
11 Creepage distances and clearances
The requirements of IEC 62868-1:2020, Clause 11 apply.
– 12 – IEC 62868-2-3:2021 © IEC 2021
12 Resistance to heat and fire
12.1 Resistance to heat
The requirements of IEC 62868-1:2020, 12.1 apply.
12.2 Resistance to fire
The requirements of IEC 62868-1:2020, 12.2 apply.
13 Photobiological safety
OLED products are not expected to reach a level of UV, infrared or blue light hazard that
requires marking or measurement.
14 Terminals
The requirements of IEC 62868-1:2020, Clause 14 apply.
15 Information for luminaire design
The information for luminaire design of IEC 62868-1:2020, Annex B apply.
Annex A
(informative)
Construction of flexible OLED tiles and panels
Figure A.1 and Figure A.2 provide schematic diagrams of glass-based flexible OLED tiles and
panels.
NOTE The diagram on the left represents the front view while that on the right gives the rear view. The OLED tile
is the most elementary OLED panel consisting of a substrate, encapsulation, OLED stack and metal ledge without a
printed circuit board (PCB), electrical connecting parts, and casing.
Figure A.1 – Schematic diagram of glass flexible OLED tile for lighting
NOTE The diagram on the left represents the front view while that on the right gives the rear view. The OLED panel
consists of an OLED tile and PCB or flexible PCB for electrical contacts, and electrical connecting parts.
Figure A.2 – Schematic diagram of film flexible OLED panel for lighting
– 14 – IEC 62868-2-3:2021 © IEC 2021
Annex B
(normative)
Classification of flexible OLED tiles and panels
Flexible OLED panels are classified as follows depending on the substrate and the
encapsulation substra
...
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