IEC 63286:2022

Flexible organic light emitting diode (OLED) panels for general lighting - Performance requirements

IEC 632186:2022 specifies the performance requirements of 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.

Panneaux à diodes électroluminescentes organiques (OLED) flexibles destinés à l'éclairage général - Exigences de performance

L'IEC 63286:2022 spécifie les exigences de performance 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 analogue, et conçus pour être pliés pendant le processus de fabrication de luminaires incurvés.

General Information

• Status: Published
• Publication Date: 27-Sep-2022
• ICS: 29.140.99 - Other standards related to lamps
• Technical Committee: SC 34A - Electric light sources
• Drafting Committee: WG 3 - TC 34/SC 34A/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 28-Sep-2022
• Completion Date: 21-Oct-2022

Overview

IEC 63286:2022 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies the performance requirements for flexible organic light emitting diode (OLED) panels intended for general lighting applications. This standard applies to OLED tiles and panels designed for indoor use, powered by supplies up to 120 V ripple-free DC, and engineered for bending during the manufacturing of curved luminaires.

The standard emphasizes type testing to ensure that flexible OLED panels meet strict performance and reliability criteria. It supports innovation in curved and flexible lighting designs, helping manufacturers, designers, and quality control professionals maintain consistent lighting quality and safety.

Key Topics

• Scope and Application
  IEC 63286:2022 focuses on flexible OLED panels used indoors in general lighting, particularly those capable of being bent during manufacturing for curved luminaires. It covers performance evaluation under defined electrical and environmental conditions, ensuring product suitability for modern lighting designs.

• Performance Requirements
  The standard defines detailed testing for photometric and electrical characteristics including:

  • Input power and luminous flux
  • Luminous efficacy
  • Chromaticity coordinates and correlated color temperature (CCT)
  • Color rendering index (CRI)
  • Luminance in flat, convex, and concave configurations
  • Luminance and chromaticity uniformity

• Reliability Testing
  To guarantee long-term performance, IEC 63286 specifies tests under high temperature and high humidity conditions for both operation and storage scenarios. The standard also assesses the reliability of electrical connections to prevent failures during use.

• Marking and Documentation
  Clear marking requirements are outlined to provide traceability and essential information about the OLED panels, including mandatory and additional markings related to electrical ratings and reliability data.

• Measurement Methods
  Annex A of the standard provides normative measurement procedures for assessing luminance and photometric characteristics in different panel shapes (flat, convex, concave), ensuring consistent and reproducible test results.

Applications

• Curved Luminaire Manufacturing
  Enables designers and manufacturers to produce innovative curved lighting fixtures with flexible OLED panels, ensuring that panels maintain performance despite mechanical bending.

• Indoor General Lighting
  Applicable for residential, commercial, and architectural indoor lighting solutions where flexible OLEDs offer advantages in design freedom, thin form factor, and energy efficiency.

• Quality Assurance in OLED Production
  Helps production and quality engineers validate OLED panel performance to meet international standards, reducing risks of early failure or inconsistent lighting quality.

• Research & Development
  Supports R&D efforts in advancing OLED lighting by providing benchmarks for performance, enabling comparison across different flexible OLED technologies.

Related Standards

• IEC 60050-845: International Electrotechnical Vocabulary – Lighting
  Provides standardized terminology related to lighting technology, supporting clear communication and understanding of terms used in IEC 63286.

• IEC 62504: General Lighting – LED Products
  Covers performance requirements for LED products, complementing the OLED focus of IEC 63286 and facilitating integration of different solid-state lighting technologies.

Practical Value

Adherence to IEC 63286:2022 ensures that flexible OLED panels for general lighting meet consistent international performance and reliability benchmarks. This translates into:

• Higher customer satisfaction from dependable and uniform light quality
• Reduced product development cycles through standardized testing processes
• Enhanced market acceptance by complying with recognized global standards
• Facilitated innovation in lighting design, especially with curved and flexible luminaires

Manufacturers, designers, and lighting professionals benefit from the clear and comprehensive criteria provided by IEC 63286 in advancing the use of flexible OLED technology in modern indoor lighting solutions.

Standards Content (Sample)

IEC 63286 ®
Edition 1.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Flexible organic light emitting diode (OLED) panels for general lighting –
Performance requirements
Panneaux à diodes électroluminescentes organiques (OLED) flexibles destinés à
l'éclairage général – Exigences de performance

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IEC 63286 ®
Edition 1.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Flexible organic light emitting diode (OLED) panels for general lighting –

Performance requirements
Panneaux à diodes électroluminescentes organiques (OLED) flexibles destinés à

l'éclairage général – Exigences de performance

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.99 ISBN 978-2-8322-5705-0

– 2 – IEC 63286:2022 © IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General statement and test conditions . 7
4.1 General . 7
4.2 General test conditions . 7
4.3 Stabilization . 8
4.3.1 General requirements for stabilization. 8
4.3.2 Current-driven stabilization . 8
4.3.3 Voltage-driven stabilization . 8
5 Marking . 8
5.1 Mandatory marking . 8
5.2 Additional marking . 9
5.3 Information on reliability of electrical connection . 10
6 Initial photometric and electrical characteristics . 10
6.1 General . 10
6.2 Input power . 10
6.3 Luminous flux . 10
6.4 Luminous efficacy . 11
6.5 Chromaticity coordinates . 11
6.6 Correlated colour temperature (CCT) . 11
6.7 Colour rendering index (CRI) . 11
6.8 Average luminance . 12
6.8.1 Initial average luminance (flat configuration) . 12
6.8.2 Initial average luminance (convex configuration) . 12
6.8.3 Initial average luminance (concave configuration) . 12
6.9 Luminance uniformity . 12
6.10 Luminous intensity distribution . 13
6.11 Surface chromaticity uniformity . 13
6.12 Angular chromaticity uniformity . 13
7 Maintained photometric characteristics . 14
7.1 General . 14
7.2 Luminous flux maintenance . 14
7.3 Maintained operating voltage . 14
7.4 Maintained chromaticity coordinates . 14
8 Reliability . 14
8.1 General . 14
8.2 High temperature and high humidity operation test . 14
8.3 High temperature and high humidity storage test . 15
8.4 Reliability of connection . 15
Annex A (normative) Measuring methods for convex and concave configurations . 16
A.1 General . 16
A.2 Luminous flux . 16
A.2.1 General . 16
A.2.2 Integrating sphere measurements . 16

A.2.3 Goniophotometric measurements . 17
A.3 Average luminance – LMD . 17
A.4 Angular chromaticity uniformity . 18
Bibliography . 22

Figure A.1 – 4π geometry sphere measurement set-ups . 16
Figure A.2 – Goniophotometer measurement set-ups . 17
Figure A.3 – Average luminance measurement set-ups (Case 1) . 18
Figure A.4 – Average luminance measurement set-ups (Case 2) . 18
Figure A.5 – Set-up for angular chromaticity measurements in the flat configuration . 20
Figure A.6 – Set-up for angular chromaticity measurements in the convex configuration . 20
Figure A.7 – Set-up for angular chromaticity measurements in the concave
configuration . 20
Figure A.8 – Schematic view of the concave configuration where the viewing angle is
smaller than 80° . 21
Figure A.9 – Schematic view of the concave configuration which enables
measurements up to 45° viewing angle . 21

Table 1 – Mandatory marking and location of marking . 8
Table 2 – Additional marking . 10

– 4 – IEC 63286:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FLEXIBLE ORGANIC LIGHT EMITTING DIODE (OLED) PANELS
FOR GENERAL LIGHTING – PERFORMANCE REQUIREMENTS

FOREWORD
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IEC 63286 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/2291/FDIS 34A/2303/RVD
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the above table.
The language used for the development of this International Standard is English.
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– 6 – IEC 63286:2022 © IEC 2022
FLEXIBLE ORGANIC LIGHT EMITTING DIODE (OLED) PANELS
FOR GENERAL LIGHTING – PERFORMANCE REQUIREMENTS

1 Scope
This document specifies the performance requirements of 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.
The requirements of this document relate only to type testing.
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 60050-845, International Electrotechnical Vocabulary (IEV) – Part 845: Lighting, available
at http://www.electropedia.org
IEC 62504, General lighting – Light emitting diode (LED) products and related equipment –
Terms and definitions
IEC 62868-2-3, Organic light emitting diode (OLED) light sources for general lighting – Safety
– Part 2-3: Particular requirements – Flexible OLED tiles and panels
IEC 62922:2016, Organic light emitting diode (OLED) panels for general lighting – Performance
requirements
IEC 62922:2016/AMD1:2021
IEC TS 62972, General lighting – Organic light emitting diode (OLED) products and related
equipment – Terms and definitions
CIE 025:2015, Test Method for LED Lamps, LED Luminaires and LED Modules
CIE S 025-SP1:2019, Test Method for OLED Luminaires and OLED Light Sources
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-845,
IEC 62504, IEC 62868-2-3, IEC 62922, and IEC TS 62972 and the following apply.
ISO and IEC maintain terminology 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
minimum bending radius
limit radius to which a flexible OLED panel can be bent in either a convex or
concave curvature without causing an operating failure
Note 1 to entry: The minimum bending radius is normally declared by the manufacturer or responsible vendor.
3.2
maximum bent condition
condition of the panel bent to the minimum bending radius
3.3
maximum bending cycle
maximum number of times a flexible OLED panel can be bent in either a
convex and concave curvature without causing an operating failure
Note 1 to entry: The maximum bending cycle is normally declared by the manufacturer or responsible vendor.
3.4
convex configuration
convex curvature
configuration where a flexible OLED is curved along a surface of curvature with its light-emitting
side directed outward
3.5
concave configuration
concave curvature
configuration where a flexible OLED is curved along a surface of curvature with its light-emitting
side directed inward
3.6
flat configuration
configuration where a flexible OLED is without curvature whatever the direction
4 General statement and test conditions
4.1 General
The requirements of this document apply in addition to the requirements of IEC 62868-2-3.
It is understood that reference to a flexible OLED panel also includes reference to flexible OLED
tiles in the requirements and tests of this document.
4.2 General test conditions
Unless otherwise specified, all measurements shall be made in an ambient temperature of
(25 ± 5) °C under a draught-free condition.
The tests shall be carried out using a flexible OLED panel in the maximum of three
configurations: flat configuration under the test conditions specified in IEC 62922, bent to the
maximum bent condition specified by the manufacturer in both the concave and convex
configurations. For those flexible OLED panels which are specified for a specific curvature, the
test for the bent condition shall be conducted using a shape and condition specified by the
manufacturer.
The tests shall be conducted at the rated current or voltage unless otherwise specified in this
document.
– 8 – IEC 63286:2022 © IEC 2022
The test conditions for constant current and constant voltage operation according to
IEC 62922:2016, 4.2 apply.
4.3 Stabilization
4.3.1 General requirements for stabilization
Stabilization is conducted in a draught-free room at a temperature of (25 ± 5) °C. The
temperature shall be maintained within ±2 °C during stabilization. The temperature shall be
measured in the integrating sphere or the point within 1,5 m from the OLED panel. If stabilization
conditions, according to 4.3.2 or 4.3.3, are not achieved within 60 min, the measurement may
be started and the observed fluctuations shall be reported.
Stabilization shall be carried out using a flexible OLED panel bent to the maximum bent
condition. For those flexible OLED panels which are specified for a specific curvature, the test
shall be conducted using the shape and condition specified by the manufacturer.
4.3.2 Current-driven stabilization
The requirements according to IEC 62922:2016, 4.3.2 apply.
4.3.3 Voltage-driven stabilization
The requirements according to IEC 62922:2016, 4.3.3 apply.
5 Marking
5.1 Mandatory marking
Information on the parameters shown in Table 1 shall be provided by the manufacturer or
responsible vendor and be located as described.
Table 1 – Mandatory marking and location of marking
Product data
Parameters Product Packaging sheet, leaflet or
website
Configuration
flat x
a) Rated total luminous flux (lm) convex x

concave x
flat x
b) Rated average luminance (cd/m ) convex x

concave x
flat x
c) Rated chromaticity coordinates

and chromaticity coordinates convex x
range
concave x
flat x
d) Rated correlated colour
convex x
temperature (K)
concave x
flat x
e) Rated colour rendering index convex x

concave x
f) Rated luminous efficacy (lm/W) flat x

Product data
Parameters Product Packaging sheet, leaflet or
website
Configuration
convex x
concave x
flat x
g) Luminous intensity distribution convex x

concave x
flat x
h) Luminance uniformity (%) convex x

concave x
flat x
i) Surface chromaticity uniformity convex x

concave x
flat x
j) Angular chromaticity uniformity convex x

concave x
convex x
a
k) Minimum bending radius
(performance) (mm)
concave x
a convex x
l) Maximum bending cycle
(performance) (times)
concave x
flat x
m) Rated median useful life (h) convex x

concave x
flat x
n) Rated luminous flux maintenance

convex x
factor (%)
concave x
flat x
o) Rated maintained operating
convex x
voltage (V)
concave x
flat x
p) Rated maintained chromaticity convex x

concave x
a
These values can be different from those of safety.

5.2 Additional marking
For flexible OLED panels, additional information of the parameters related to configurations
other than flat or the maximum bent condition, may be provided by the manufacturer or
responsible vendor. See Table 2 as an example.

– 10 – IEC 63286:2022 © IEC 2022
Table 2 – Additional marking
Configuration
Minimum
Additional bending radius
bending
(convex or concave)
radius
Parameters
flat
XX XX ……. XX
1 2 ｎ
a a
a
(mm) (mm)
(mm)
a a a a
a) rated luminous flux (lm) …….
YYY YYY YYY YYY
0 1 2 n
a a a a
b) rated average luminance uniformity (%) …….
ZZZ ZZZ ZZZ ZZZ
0 1 2 n
a
Values to be declared by the manufacturer or responsible vendor.

5.3 Information on reliability of electrical connection
The requirements according to IEC 62922:2016, 5.2 apply.
6 Initial photometric and electrical characteristics
6.1 General
The initial photometric and electrical measurement of the flexible OLED panel shall be
conducted in the flat configuration, the maximum bent condition and other configurations if
declared according to Table 2.
The panel shall be supported by a semi-cylinder for each configuration.
In case some measurements cannot be conducted in the maximum bent condition, appropriate
conditions shall be declared in the data sheet.
The initial values of photometric characteristics shall be measured after stabilization of the
flexible OLED panel.
For operation, stabilization and test conditions of the flexible OLED panel, 4.2 and 4.3 apply.
Unless otherwise specified, for general conditions of photometric and colorimetric
measurements, CIE S 025 and CIE S 025-SP1 shall apply.
6.2 Input power
The input power test of the flexible OLED panel shall be conducted with the rated DC current
or DC voltage.
Compliance:
For all the tested samples, the measured input power shall not exceed the rated power by more
than 10 % after stabilization.
6.3 Luminous flux
For the measurement of the luminous flux of a flexible OLED panel in the flat configuration,
IEC 62922:2016, 7.2 applies. For the convex or concave configurations, Annex A applies.

Compliance:
For all the tested samples, the initial luminous flux (flat configuration), the initial luminous flux
(convex configuration) and the initial luminous flux (concave configuration) shall not deviate by
more than 10 % from the rated initial values.
6.4 Luminous efficacy
A flexible OLED panel efficacy shall be calculated from the measured initial luminous flux of the
individual OLED panel, divided by the measured initial input power of the same individual
flexible OLED panel in each configuration.
Compliance:
For all the tested samples, the initial luminous efficacy (flat configuration), the initial luminous
efficacy (convex configuration) and the initial luminous efficacy (concave configuration) shall
not be less than 90 % of their respective rated initial values.
6.5 Chromaticity coordinates
If the spectral information is obtained through the luminous flux measurement, the chromaticity
coordinates can be calculated in accordance with IEC 62922:2016, 7.4 and
IEC 62922:2016/AMD1:2021, 7.4. Otherwise, the spectral power distribution measurement shall
be conducted and the chromaticity coordinates shall be calculated from the spectral distribution
in each configuration and shall be reported. For the bent configurations, Annex A applies.
The measurement set-up shall correspond to the OLED panel configuration as specified in
Annex A for the selected measurement method.
Compliance:
Where only a rated chromaticity coordinate pair is given in the data sheet: the chromaticity
difference Δ(u',v') between the rated and measured chromaticity coordinates shall be less than
0,005. Where a range of chromaticity coordinates is declared, the measured chromaticity
coordinates of an OLED panel shall not fall outside the rated range of chromaticity coordinates.
6.6 Correlated colour temperature (CCT)
If the spectral information is obtained through the luminous flux measurement, the CCT can be
calculated in accordance with IEC 62922:2016, 7.5. Otherwise, the spectral power distribution
measurement shall be conducted and the CCT shall be calculated from the spectral distribution
in each configuration and shall be reported. For the bent configurations, Annex A applies.
The measurement set-up shall correspond to the OLED panel configuration as specified in
Annex A for the selected measurement method.
A requirement is not needed here as it is given for chromaticity coordinates already.
6.7 Colour rendering index (CRI)
If the spectral information is obtained through the luminous flux measurement, the CRI can be
calculated in accordance with IEC 62922:2016, 7.6. Otherwise, the spectral power distribution
measurement shall be conducted and the CRI shall be calculated from the spectral distribution
in each configuration and shall be reported. For the bent configurations, Annex A applies.
The measurement set-up shall correspond to the OLED panel configuration as specified in
Annex A for the selected measurement method.

– 12 – IEC 63286:2022 © IEC 2022
Compliance:
The calculated values of the initial CRI shall not be lower than 5 points from the rated CRI of
the same configuration.
6.8 Average luminance
6.8.1 Initial average luminance (flat configuration)
The initial average luminance of a flexible OLED panel in flat configuration is measured in
accordance with IEC 62922:2016, 7.7.1 and IEC 62922:2016/AMD1:2021, 7.7.1. The
measurement point locations on the flexible panel shall be the same as the locations specified
in IEC 62922:2016/AMD1:2021, Clause G.4.
Compliance:
For all the tested samples, the initial average luminance (flat configuration) shall not deviate by
more than 10 % from the rated initial average luminance (flat configuration).
6.8.2 Initial average luminance (convex configuration)
A flexible OLED panel shall be placed on a semi-cylindrical base whose radius is the minimum
bending radius in the convex configuration. The number and the positions of the spots on the
flexible OLED panel to be measured shall be identical to the flat configuration. For the
measurement, Annex A applies.
The arithmetic average of all luminance values of the measured areas is taken as the initial
average luminance in the convex configuration.
Compliance:
For all the tested samples, the initial average luminance (flat configuration) shall not deviate by
more than 10 % from the rated initial average luminance (flat configuration).
6.8.3 Initial average luminance (concave configuration)
A flexible OLED panel shall be placed on a semi-cylindrical base whose radius is the minimum
bending radius in the concave configuration. The number and the positions of the spots on the
flexible OLED panel to be measured shall be identical to the flat configuration. For the
measurement, Annex A applies.
The arithmetic average of all luminance values of the measured areas is taken as the initial
average luminance in the concave configuration.
Compliance:
For all the tested samples, the initial average luminance (flat configuration) shall not deviate by
more than 10 % from the rated initial average luminance (flat configuration).
6.9 Luminance uniformity
The initial luminance uniformity shall be not more than 5 % (flat configuration)/15 % (convex or
concave configuration) below the rated luminance uniformity.

The initial luminance uniformity shall be calculated from the luminance distributions derived
from the average luminance measurement. The initial luminance uniformity in the flat, convex
and concave configurations are derived from the average luminance distribution measured in
each configuration, respectively. The luminance uniformity, U (expressed in per cent), of the
panel is characterized by the following formula, as specified in IEC 62922. L and L denote
max min
the maximum and the minimum luminance values in the measured luminance distribution for
each configuration.
   
U=1− L − L /L + L ×100=2× L /L + L ×100%
( ) ( ) ( ) (1)
max min max min min max min
   
6.10 Luminous intensity distribution
Luminous intensity distribution data shall be available. This data shall be provided in
accordance with an established international or regional format. It shall be available in an
electronic file format (see IEC 62922:2016, Annex A).
The luminous intensity distributions shall be obtained for the flexible panel in flat, convex and
concave configurations. Unless otherwise specified by the manufacturer, the luminous intensity
distribution of a flexible OLED panel shall be measured in far-field conditions, where the
inverse-square law is sufficiently satisfied.
6.11 Surface chromaticity uniformity
The chromaticities at different points of the grid specified in IEC 62922:2016/AMD1:2021,
Clause G.4 are measured. These chromaticity coordinates are used to determine the
chromaticity difference between all pairs of areas i and j, where i ≠ j by applying Formula (2).
′ ′ ′ ′ 2 ′ ′ 2
𝛥𝛥(𝑢𝑢,𝑣𝑣 ) = (𝑢𝑢 −𝑢𝑢 ) +(𝑣𝑣 −𝑣𝑣 ) (2)
�
𝑖𝑖𝑖𝑖
𝑖𝑖 𝑖𝑖 𝑖𝑖 𝑖𝑖
The surface chromaticity uniformity is defined as the largest chromaticity difference Δ(u′, v′)

ij
between any two areas.
The surface chromaticity uniformity is calculated in flat, convex and concave configurations,
based on the corresponding data set.
Compliance:
The surface chromaticity uniformity values for flat, convex and concave configurations shall not
deviate by more than 0,003 from their respective rated values.
6.12 Angular chromaticity uniformity
For the measurement of the angular chromaticity uniformity of a flexible OLED panel in flat,
convex and concave configurations, Annex A shall apply.
The angular chromaticity uniformity is the average of the chromaticity differences between all
pairs of chromaticity coordinates.
Compliance:
The angular chromaticity uniformity values for flat, convex and concave configurations shall not
deviate by more than 0,003 from their respective rated values.

– 14 – IEC 63286:2022 © IEC 2022
7 Maintained photometric characteristics
7.1 General
For the measurement of the maintained characteristics of a flexible OLED panel in flat, convex
and concave configurations, IEC 62922 apply. Aging shall be conducted while maintaining the
flexible OLED panel at the minimum bending radius. Additional attachments are allowed to hold
the curved shape. The temperature change caused by the attachment shall be less than 3 K.
7.2 Luminous flux maintenance
IEC 62922:2016/AMD1:2021, 8.1. applies.
7.3 Maintained operating voltage
IEC 62922:2016/AMD1:2021, 8.2. applies.
7.4 Maintained chromaticity coordinates
IEC 62922:2016/AMD1:2021, 8.3. applies.
8 Reliability
8.1 General
Reliability tests shall be carried out using a flexible OLED panel in all relevant product
configurations as follows.
– flat configuration;
– bent to the maximum bent condition specified by the manufacturer or responsible vendor in
the concave configuration;
– bent to the maximum bent condition specified by the manufacturer or responsible vendor in
the convex configuration.
8.2 High temperature and high humidity operation test
A flexible OLED panel shall sustain operation under high temperature and high humidity
conditions.
A flexible OLED panel shall be kept in a humidity cabinet having a relative humidity of (90 ± 5) %
for 48 h. The ambient temperature in the cabinet shall be maintained within (60 ± 2) °C. The
test shall be conducted so that no condensation or water droplets appear on any part of the
device under test. The flexible OLED panel shall be in normal operation with the rated current
and rated power inside the humidity cabinet where humidity and temperature shall be
maintained. After the period in the humidity cabinet, the luminous flux and chromaticity of the
flexible OLED panel shall be measured following stabilization at normal operating conditions.
Compliance:
There shall be no visible defect (such as dark spots) larger than 0,5 mm when the flexible OLED
panel is switched on.
The measured total luminous flux of flexible OLED panels shall not be less than 90 % of the
initial total luminous flux.
The chromaticity difference between the measurements taken before and after the test shall
not exceed 0,005 in the u′, v′ colour space.

For constant current operation, the measured voltage shall not deviate by more than 5 % from
the initial voltage. For constant voltage operation, the measured current shall not deviate by
more than 10 % from the initial current.
8.3 High temperature and high humidity storage test
A flexible OLED panel shall sustain storage under high temperature and high humidity
conditions.
A flexible OLED panel shall be kept in a humidity cabinet having a relative humidity of (90 ± 5) %
for 500 h The ambient temperature in the cabinet shall be maintained within (60 ± 2) °C. The
flexible OLED panel shall be placed in the humidity cabinet where humidity and temperature
are maintained without supplying power to the OLED panel. The test shall be conducted so that
no condensation or water droplets appear on any part of the device under test. After the high
temperature and high humidity storage test, the luminous flux and chromaticity of the flexible
OLED panel are measured according to 6.3 and 6.5, respectively. Any convenient mounting
position may be used during storage. The mounting position shall be recorded in the test report.
Compliance:
The measured total luminous flux of flexible OLED panels shall not be less than 90 % of the
initial total luminous flux.
There shall be no visible defect (such as dark spots) larger than 0,5 mm when the flexible OLED
panel is switched on.
The chromaticity difference between the measurements taken before and after the test shall
not exceed 0,005 in the u′, v′ colour space.
For constant current operation, the measured voltage shall not deviate by more than 5 % from
the initial voltage. For constant voltage operation, the measured current shall not deviate by
more than 10 % from the initial current.
8.4 Reliability of connection
The information on reliability of connection shall be accurate.
The test sample shall be installed as instructed in the manufacturer's literature. Then the sample
shall be subjected to all the test methods for which the manufacturer has made performance
claims (e.g. pull force) in the instructions.
Compliance:
The measured performance shall not be less than 95 % of the claimed performance.
No parts of the flexible OLED panel shall become detached during the test. There shall not be
any visible defect on the OLED panel when switched on after the test.

– 16 – IEC 63286:2022 © IEC 2022
Annex A
(normative)
Measuring methods for convex and concave configurations
A.1 General
Annex A describes the measuring method of typical characteristics of flexible OLED panels for
the convex and concave configurations.
An image luminance measurement device (ILMD) is not recommended to measure the
luminance of flexible OLED panels in convex or concave configurations, as the distance
between the ILMD and the flexible OLED panel does not remain the same due to the curvature.
NOTE For use of ILMD, see CIE 242:2020.
A.2 Luminous flux
A.2.1 General
There are two typical methods of measuring luminous flux: one is a spherical photometer
method with an integrating sphere and the other is a light distribution measurement method
with a goniophotometer of any type.
A.2.2 Integrating sphere measurements
The initial luminous flux of a flexible OLED panel in the convex or concave configuration is
measured in the maximum bent condition. Additional measurement of the luminous flux is
optional, in case the additional luminous flux data is provided by the manufacturer or
responsible vendor.
Integrating spheres with 4π geometry can be used to measure flexible OLED panels in convex
or concave configurations. The flexible OLED panel shall be installed in such a way that light
emitted from edges is included in the measured value. Figure A.1 shows exemplary
measurement set-ups. For all configurations of the sample (flat, convex or concave), the centre
of the light emitting surface of the sample shall be placed at the centre of the sphere, with the
light-emitting area facing upwards, in accordance with IEC 62922.
NOTE For general guidance on the use of integrating sphere, see CIE 242:2020, 4.1, CIE S 025:2015 and CIE S
025-SP1:2019, 6.2.
a) flat b) convex c) concave
Figure A.1 – 4π geometry sphere measurement set-ups

A.2.3 Goniophotometric measurements
Goniophotometry can be used for flexible OLED panels of all sizes as an alternative to
integrating sphere photometry. Ensure the emitted light from the edges is included in the
measurement.
In the absence of an integrating sphere of appropriate size relative to the flexible OLED panel
to be measured, a goniophotometer shall be used, as shown in Figure A.2.
In the case of convex or concave configuration of flexible OLED panel, measurement shall be
conducted by aligning the rotation centre at the vertex of the source.
NOTE For general guidance on the use of goniophotometers, see CIE 084, CIE 239, CIE S 025:2015, 4.5 and 6.2
and CIE 242:2020, 4.2.
Figure A.2 – Goniophotometer measurement set-ups
A.3 Average luminance – LMD
If using a spot luminance measurement device (LMD), the measurement of average luminance
shall be carried out in a perpendicular direction to the targeted spot of the light output surface
of a flexible OLED panel.
The initial average luminance of a flexible OLED panel is measured in accordance with
IEC 62922:2016, 7.7.1 and IEC 62922:2016/AMD1:2021, 7.7.1. The measurement point
locations on the flexible panel shall be the same as the locations specified in
IEC 62922:2016/AMD1:2021, Clause G.4. All measuring point locations of convex and concave
configurations are the same as those of the flat configuration, shown in Figure A.3 and
Figure A.4.
To measure a flexible OLED panel in a convex o
...