IEC 62341-5:2009

IEC 62341-5 ®
Edition 1.0 2009-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Organic light emitting diode (OLED) displays –
Part 5: Environmental testing methods

Afficheurs à diodes électroluminescentes organiques (DELO) –
Partie 5: Méthodes d’essai d’environnement

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IEC 62341-5 ®
Edition 1.0 2009-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Organic light emitting diode (OLED) displays –
Part 5: Environmental testing methods

Afficheurs à diodes électroluminescentes organiques (DELO) –
Partie 5: Méthodes d’essai d’environnement

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 31.260 ISBN 978-2-88910-676-9
– 2 – 62341-5 © IEC:2009
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Terms, definitions and letter symbols .6
4 Structure of testing equipment.6
5 Standard conditions.6
5.1 Standard reference atmosphere .6
5.2 Standard atmospheric conditions for reference measurements and tests .6
5.3 Standard atmospheric conditions for measurements and tests.7
5.4 Standard atmospheric conditions for assisted drying .7
5.5 Recovery conditions .7
5.6 Standard measuring conditions .7
5.7 Operating conditions .7
5.8 Standard OLED display module test configuration .7
6 Measurements and analysis .7
7 Environmental tests.8
7.1 General .8
7.2 Storage at high temperature .8
7.3 Storage at low temperature .9
7.4 Damp heat, steady state, non-operational .9
7.5 Operation at high temperature.10
7.6 Operation at low temperature .10
7.7 Damp heat, steady state, operational .11
7.8 Damp heat, cyclic.12
7.9 Thermal shock.12
7.10 (Simulated) Sunlight exposure.13
7.11 Low air pressure.13
7.12 ESD .15

Table 1 – Standard conditions for reference measurements and tests .6
Table 2 – Application and luminance (examples) .7

62341-5 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
ORGANIC LIGHT EMITTING DIODE (OLED) DISPLAYS –

Part 5: Environmental testing 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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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.
International Standard IEC 62341-5 has been prepared by IEC technical committee 110: Flat
panel display devices.
The text of this standard is based on the following documents:
FDIS Report on voting
110/192A/FDIS 110/203/RVD
Full information on the voting for the approval on this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 62341-5 © IEC:2009
A list of all the parts in the IEC 62341 series, under the general title Organic light emitting
diode (OLED) displays, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
62341-5 © IEC:2009 – 5 –
ORGANIC LIGHT EMITTING DIODE (OLED) DISPLAYS –

Part 5: Environmental testing methods

1 Scope
This part of IEC 62341 defines testing methods for evaluating environmental endurance of
organic light emitting diode display modules (OLED display modules) for use and storage
under the assumed usage environment.
2 Normative references
The following referenced documents are indispensable for the application 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, International Electrotechnical Vocabulary (IEV)
IEC 60068-1:1988, Environmental testing – Part 1: General and guidance
IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-5, Environmental testing – Part 2: Tests – Test Sa: Simulated solar radiation at
ground level
IEC 60068-2-13, Environmental testing – Part 2: Tests-Test M: Low air pressure
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic (12 h
+ 12 h cycle)
IEC 60068-2-78:2001, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat,
steady state
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61747-5:1998, Liquid crystal and solid-state display devices – Part 5: Environmental,
endurance and mechanical test methods
IEC 62341-1-2, Organic light emitting diode displays – Part 1-2: Terminology and letter
symbols
IEC 62341-6-1:2009, Organic light emitting diode displays – Part 6-1: Measuring methods of
optical and electro-optical parameters

– 6 – 62341-5 © IEC:2009
3 Terms, definitions and letter symbols
For the purpose of this document, the terms, definitions and symbols defined in
IEC 62341-1-2, IEC 60068-1 and IEC 60050, as well as the following apply.
3.1
operating test pressure
P
op
air pressure at which the OLED display module is operated during the tests
3.2
storage test pressure
P
st
air pressure at which the OLED display module is stored in a non-operating state during the
tests
4 Structure of testing equipment
The system diagrams and/or operating conditions of the testing equipment shall comply with
the structure specified in each item.
5 Standard conditions
5.1 Standard reference atmosphere
Temperature: 25 °C
Air pressure: 101,3 kPa
NOTE No requirement for relative humidity is given because correction by calculation is generally not possible.
If the parameters to be measured depend on temperature and/or pressure, and their
dependence on temperature and pressure is known, the parameter values can be measured
under the conditions specified in 5.3 and corrected by calculation to the standard reference
atmosphere above.
5.2 Standard atmospheric conditions for reference measurements and tests
If the parameters to be measured depend on temperature, pressure and humidity and their
dependence on temperature, pressure and humidity is unknown, the atmospheres to be
specified shall be selected from the following values, as shown in Table 1. The selected
values shall be noted in the relevant specifications.
Table 1 – Standard conditions for reference measurements and tests

a b b
Temperature Relative humidity Air pressure
°C % RH kPa
20 ±2/ ±1
25 ±2/ ±1
45 to 75 86 to 106
30 ±2/ ±1
35 ±2/ ±1
a
The close tolerances may be used for the reference measurements. The wider tolerances may be used only

when allowed by the relevant specification
b
Inclusive values.
62341-5 © IEC:2009 – 7 –
5.3 Standard atmospheric conditions for measurements and tests
Unless otherwise specified, all tests and measurements shall be carried out under standard
atmospheric conditions.
a) Temperature : 15 °C to 35 °C.
b) Relative humidity : 25 % to 85 %, where appropriate.
c) Air pressure : 86 kPa to 106 kPa.
The absolute humidity of the atmosphere shall not exceed 22 g/m .
5.4 Standard atmospheric conditions for assisted drying
The conditions specified in 5.5 of IEC 60068-1:1988 shall be applied.
5.5 Recovery conditions
The recovery conditions specified in 5.4 of IEC 60068-1:1988 shall be applied.
5.6 Standard measuring conditions
The standard measuring conditions specified in IEC 62341-6-1:2009 shall be applied.
5.7 Operating conditions
Apply a white level (100 % grey level) to the full screen of the OLED display module. For
some display applications (such as video and still images), the luminance can be reduced.
Table 2 shows some examples of combinations of applications and luminance levels.
Table 2 – Application and luminance (examples)
Display applications Full screen luminance
TVs 15 % (of the 4 % window luminance)
Digital camera 20 % (of the 4 % window luminance)
Cell phone 30 % (of the 4 % window luminance)
NOTE  The 4 % window luminance is defined in IEC 62341-6-1:2009, 6.1.3.2.

If different conditions are used, they shall be noted in the report.
5.8 Standard OLED display module test configuration
Unless otherwise specified, the OLED display modules shall be tested without any protective
elements added, nor voltage applied.
6 Measurements and analysis
The following items may be evaluated on initial, intermediate and final measurements:
a) visual examination and inspection;
b) optical performance;
– 8 – 62341-5 © IEC:2009
c) electro-optical performance.
The measuring method, measuring frequency and evaluation criteria shall be specified in the
detailed specifications.
7 Environmental tests
7.1 General
The actual values used for all measurements such as temperature shall be noted in the report.
The environmental testing method is often used as one of several endurance testing methods.
When the testing method defined in this standard is used as one of these endurance testing
methods, review the testing period and/or conditions appropriately as specified in the relevant
specification.
7.2 Storage at high temperature
7.2.1 Purpose
The purpose of this test is to check the performance of the OLED display module after high
temperature storage.
7.2.2 Storage conditions
Test Bb of IEC 60068-2-2:2007 shall be applied with the following specific conditions.
Test Bb: Dry heat for non heat-dissipating specimens with gradual change of temperature.
a) Temperature
The temperature shall be selected from the values given below depending on application.
(X ± 3) °C  (X = 100, 95, 90, 85, 80, 75, 70, 65, 60, 55, 50, 45, 40, 35, 30)
The temperature used shall be noted in the report.
b) Duration
The duration shall be selected from the values given below depending on application.
2 h, 16 h, 24 h, 48 h, 72 h, 96 h, 120 h, 192 h, 240 h, 300 h, 500 h and 1 000 h
The duration used shall be noted in the report.
c) Humidity
The absolute humidity of the atmosphere should not exceed 20 g/m (corresponding
approximately to 50 % relative humidity at 35 °C).
7.2.3 Recovery
The OLED display module shall be subjected to the recovery procedure in the chamber or
otherwise as appropriate.
a) The OLED display module shall then remain under standard atmospheric conditions for
recovery for a period adequate for the attainment of temperature stability.

62341-5 © IEC:2009 – 9 –
b) If required by the relevant specification, the OLED display module shall be switched on or
loaded and measured continuously during the recovery period.
c) If the standard conditions given above are not appropriate for the OLED display module to
be tested, the relevant specification may call for other recovery conditions.
7.3 Storage at low temperature
7.3.1 Purpose
The purpose of this test is to check the performance of the OLED display module after low
temperature storage.
7.3.2 Storage conditions
Test Ab of IEC 60068-2-1:2007 shall be applied with the following specific conditions.
Test Ab: Cold for non heat-dissipating specimens with gradual change of temperature.
a) Temperature
The temperature shall be selected from the values given below depending on application.
(X ± 3) °C  (X = -50, -45, -40, -35, -30, -25, -20, -15, -10, -5, 0)
The temperature used shall be noted in the report.
b) Duration
The duration shall be selected from the values given below depending on application.
2 h, 16 h, 24 h, 48 h, 72 h, 96 h, 120 h, 192 h, 240 h, 300 h, 500 h and 1 000 h
The duration used shall be noted in the report.
7.4 Damp heat, steady state, non-operational
7.4.1 Purpose
The purpose of this test is to check the performance of the OLED display module after high
temperature and high humidity storage.
7.4.2 Storage conditions
IEC 60068-2-78:2001 shall be applied with the following specific conditions.
a) Temperature
The temperature shall be selected from the values given below depending on application.
(X ± 3) °C  (X = 60, 55, 50, 45, 40, 35, 30)
The temperature used shall be noted in the report.
b) Humidity  (93 ± 3) % RH or (85 ± 3) % RH
The humidity used shall be noted in the report.

– 10 – 62341-5 © IEC:2009
c) Duration
The duration shall be selected from the values given below depending on application.
2 h, 16 h, 24 h, 48 h, 72 h, 96 h, 120 h, 192 h, 240 h, 300 h, 500 h and 1 000 h
The duration used shall be noted in the report.
7.5 Operation at high temperature
7.5.1 Purpose
The purpose of this test is to check the performance of the OLED display module during and
after operation at high temperature operating conditions.
7.5.2 Test conditions
Test Bd or Be of IEC 60068-2-2:2007 shall be applied with the following specific conditions.
The relevant specification shall define the Test (Bd or Be) to be used.
Depending on application, the combination of temperature and operating time should be
considered.
Test Bd: Dry heat for heat-dissipating specimens with gradual change of temperature that are
not powered during the conditioning period.
Test Be: Dry heat for heat-dissipating specimens with gradual change of temperature that are
required to be powered throughout the test.
a) Temperature
The temperature shall be selected from the values given below depending on application.
(X ± 3) °C  (X = 80, 75, 70, 65, 60, 55, 50, 45, 40, 35, 30)
The temperature used shall be noted in the report.
b) Operating time
The operating time at test temperature shall be selected from the values given below
depending on application.
2 h, 4 h, 8 h, 12 h, 24 h, 48 h, 72 h and 96 h
The operating time used shall be noted in the report.
c) Operating conditions
The operating conditions are specified in 5.7.
7.6 Operation at low temperature
7.6.1 Purpose
The purpose of this test is to check the performance of the OLED display module during and
after operation at low temperature operating conditions.

62341-5 © IEC:2009 – 11 –
7.6.2 Test conditions
Test Ad or Ae of IEC 60068-2-1:2007 shall be applied with the following specific conditions.
The relevant specification shall define the Test (Ad or Ae) to be used.
Depending on application, the combination of temperature and operating time should be
considered.
Test Ad: Cold for heat-dissipating specimens with gradual change of temperature that are
powered after initial temperature stabilization.
Test Ae: Cold for heat-dissipating specimens with gradual change of temperature that are
required to be powered throughout the test.
a) Temperature
The temperature shall be selected from the values given below depending on application.
(X ± 3) °C  (X = -30, -25, -20, -15, -10, -5, 0)
The temperature used shall be noted in the report.
b) Operating time
The operating time at test temperature shall be selected from the values given below
depending on application.
2 h, 4 h, 8 h, 12 h, 24 h, 48 h, 72 h and 96 h
The operating time used shall be noted in the report.
c) Operating conditions
The operating conditions are specified in 5.7.
7.7 Damp heat, steady state, operational
7.7.1 Purpose
The purpose of this test is to check the performance of the OLED display module during and
after operation at high temperature and high humidity operating conditions.
7.7.2 Test conditions
No condensation on the OLED display module shall be generated.
IEC 60068-2-78:2001 shall be applied with the following specific conditions.
Depending on application, the combination of temperature and operating time should be
considered.
a) Temperature
The temperature shall be selected from the values given below depending on application.

– 12 – 62341-5 © IEC:2009
(X ± 3) °C   (X = 60, 55, 50, 45, 40, 35, 30)
The temperature used shall be noted in the report.
b) Humidity  (93 ± 3) % RH or (85 ± 3) % RH
The humidity used shall be noted in the report.
c) Operating time
The operating time at test temperature and humidity shall be selected from the values given
below depending on application.
2 h, 16 h, 24 h, 48 h, 72 h and 96 h
The operating time used shall be noted in the report.
d) Operating condition
The operating condition is specified in 5.7.
7.7.3 Testing procedure
Unless otherwise specified, Clause 7 of IEC 60068-2-78:2001 shall be applied.
7.8 Damp heat, cyclic
7.8.1 Purpose
The purpose of this test is to check the performance of the OLED display module under
conditions of high humidity – combined with cyclic temperature changes depending on
application.
7.8.2 Test
IEC 60068-2-30 shall be applied.
7.9 Thermal shock
7.9.1 Purpose
The purpose of this test is to check the ability of the OLED display module to withstand either
rapid change of temperature or specific change rate of temperature while the OLED display
module is turned off.
7.9.2 Test conditions
Subclauses 3.1.1 or 3.1.2 of IEC 61747-5:1998 shall be applied depending on application with
the following specific conditions.
3.1.1 of IEC 61747-5:1998, Rapid change of temperature,
3.1.2 of IEC 61747-5:1998, Specific change rate of temperature
a) Temperature
The temperature shall be specified in the relevant specification. The values of low
temperature and high temperature shall be selected from those given in 7.3.2 and 7.2.2
respectively.
62341-5 © IEC:2009 – 13 –
The temperature used shall be noted in the report.
b) Exposure time
The exposure time to low and high temperature shall be selected from the values given below,
respectively:
10 min, 30 min, 1 h, 2 h and 3 h
The exposure time used shall be noted in the report.
c) Transition time
The transition time for the rapid change of temperature test (3.1.1 of IEC 61747-5:1998) shall
be less than 3 min.
d) Number of cycles
Unless otherwise specified by the relevant specification, the number of cycles shall be
selected from the values given below.
5, 10, 20, 30
Maximum testing duration shall be 60 h.
7.10 (Simulated) Sunlight exposure
7.10.1 Purpose
The purpose of this test is to check the performance of the OLED display module under
(simulated) sunlight exposure.
7.10.2 Test equipment
IEC 60068-2-5 shall be applied with the following specific conditions.
A light source shall be capable of maintaining the specified test condition. The relevant
specification shall specify the light source.
7.10.3 Test conditions and testing procedures
IEC 60068-2-5 shall be applied, in which procedure A, B, or C can be selected depending on
application.
If a different test method is used, it shall be noted in the report.
7.11 Low air pressure
7.11.1 Purpose
The purpose of this test is to check the influence of air pressure on the assumption that the
OLED display module is used at high altitude area.

– 14 – 62341-5 © IEC:2009
7.11.2 Test conditions
7.11.2.1 General
IEC 60068-2-13 shall be applied with the following specific conditions.
7.11.2.2 Operating test
This test starts at ambient conditions. The OLED display module shall be turned on before
decreasing the pressure.
a) Pressure
Air pressure is reduced 1 kPa/min or slower, starting from atmospheric pressure (86 kPa to
106 kPa) down to P .
op
P shall be selected from the values given below.
op
(60 ± 5) kPa
(70 ± 5) kPa
(80 ± 5) kPa
The pressure used shall be noted in the report.
b) Operating conditions
The operating conditions are specified in 5.7.
7.11.2.3 Non-operating test
The following items are to be taken into consideration.
a) Pressure
Air pressure is reduced 4 kPa/min or slower, starting from atmospheric pressure (86 kPa to
106 kPa) down to P .
st
shall be selected from the values given be
...