IEC 62715-6-2:2017

Flexible display devices - Part 6-2: Environmental testing methods

IEC 62715-6-2:2017(E) specifies testing methods for evaluating the environmental endurance of flexible display panels and modules for use, storage and transport under assumed usage environment. This part of IEC 62715 is applicable to flexible display panels and modules such as liquid crystal display devices (LCDs), electric paper display devices (EPDs), and organic light emitting diode display devices (OLEDs). This part of IEC 62715 will also be suitable for flexible panel or module with mechanical operation.

General Information

• Status: Published
• Publication Date: 23-May-2017
• ICS: 31.120 - Electronic display devices
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 8 - TC 110/WG 8
• Current Stage: PPUB - Publication issued
• Start Date: 16-Jun-2017
• Completion Date: 24-May-2017

Overview

IEC 62715-6-2:2017 - Flexible display devices: Part 6-2 Environmental testing methods - defines standardized test methods to evaluate the environmental endurance of flexible display panels and modules during use, storage and transport. The standard applies to flexible technologies such as LCD, EPD (electronic paper) and OLED displays, and is also suitable for flexible panels or modules with mechanical operation. It focuses on reproducible conditioning, measurement and recovery procedures so manufacturers and test laboratories can assess environmental robustness and comparability.

Key topics and requirements

• Scope of tests: Environmental endurance for use, storage and transport under assumed usage environments.
• Test types covered (representative list from the standard):
  • Storage at high and low temperature
  • Temperature change (storage) and specified change rates
  • Damp heat - steady state (storage) and cyclic (storage)
  • Operation at high and low temperature
  • Damp heat - steady state (operational)
• Standard conditions and atmospheres:
  • Standard reference atmosphere: 25 °C, 101.3 kPa (no RH required for reference).
  • Standard test atmosphere: temperature 15–35 °C, relative humidity 25–85% (where appropriate), air pressure 86–106 kPa.
  • Referee measurement options: specific temperature/RH combinations (e.g., 20 °C, 25 °C, 30 °C, 35 °C with specified RH ranges) for cases where humidity/pressure effects are unknown.
  • Assisted drying: typically 55 °C ±2 °C, RH ≤ 20 %, 86–106 kPa for 6 hours (unless otherwise specified).
• Recovery procedures and measurements: Recovery conditions per IEC 60068-1, guidance on stabilisation time and when to power/load the device during recovery.
• Measurement infrastructure: Requirements for the structure of measuring equipment and guidance on measurement and analysis procedures.

Practical applications and users

• Who uses this standard:
  • Flexible display manufacturers (design, reliability and QA teams)
  • Independent test laboratories and certification bodies
  • OEMs and integrators validating display modules for product reliability
  • R&D teams optimizing materials and packaging for environmental durability
• Why it matters:
  • Ensures consistent environmental qualification for flexible OLED, LCD and EPD modules.
  • Supports design decisions for storage, transport and end‑use climates.
  • Provides reproducible methods for comparing materials, barrier layers, adhesives and mechanical components under temperature and humidity stress.

Related standards

• IEC 60068 series (general environmental testing methods and guidance)
• Other parts of IEC 62715 (mechanical stress tests, optical and visual measurement methods)
• IEC 62341 series (OLED display measurement methods)

Using IEC 62715-6-2 helps organizations implement standardized environmental testing for flexible display devices, enabling reliable product performance across real-world storage, transport and operating conditions.

Standards Content (Sample)

IEC 62715-6-2 ®
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
Flexible display devices –
Part 6-2: Environmental testing methods

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IEC 62715-6-2 ®
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
Flexible display devices –
Part 6-2: Environmental testing methods

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120 ISBN 978-2-8322-4370-1

– 2 – IEC 62715-6-2:2017 © IEC 2017
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Structure of measuring equipment . 7
5 Standard conditions . 7
5.1 Standard reference atmosphere . 7
5.2 Standard atmospheric conditions for referee measurements and tests . 7
5.3 Standard atmospheric conditions for measurements and tests . 8
5.4 Recovery conditions . 8
5.5 Standard atmospheric conditions for assisted drying . 8
5.6 Operating conditions . 8
5.7 Standard flexible display test configuration . 8
6 Measurements and analysis . 9
7 Environmental testing methods . 9
7.1 General . 9
7.2 Storage at high temperature . 9
7.2.1 Purpose . 9
7.2.2 Test conditions . 9
7.3 Storage at low temperature . 10
7.3.1 Purpose . 10
7.3.2 Test conditions . 10
7.4 Temperature change, storage . 10
7.4.1 Purpose . 10
7.4.2 Rapid change of temperature . 10
7.4.3 Specified change rate of temperature . 10
7.5 Damp heat, steady state, storage . 11
7.5.1 Purpose . 11
7.5.2 Test conditions . 11
7.6 Damp heat, cyclic, storage . 11
7.6.1 Purpose . 11
7.6.2 Test conditions . 11
7.7 Operation at high temperature . 12
7.7.1 Purpose . 12
7.7.2 Test conditions . 12
7.8 Operation at low temperature . 12
7.8.1 Purpose . 12
7.8.2 Test conditions . 12
7.9 Damp heat, steady state, operational . 13
7.9.1 Purpose . 13
7.9.2 Test conditions . 13
Bibliography . 14

Table 1 – Standard conditions for referee measurements and tests . 7
Table 2 – Assisted drying condition . 8
Table 3 – Examples of the damp heat, steady state test conditions . 11

– 4 – IEC 62715-6-2:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FLEXIBLE DISPLAY DEVICES –
Part 6-2: Environmental testing methods

FOREWORD
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International Standard IEC 62715-6-2 has been prepared by IEC technical committee 110:
Electronic display devices.
The text of this International Standard is based on the following documents:
FDIS Report on voting
110/860/FDIS 110/871/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62715 series, published under the general title Flexible display
devices, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://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.
A bilingual version of this publication may be issued at a later date.

– 6 – IEC 62715-6-2:2017 © IEC 2017
FLEXIBLE DISPLAY DEVICES –
Part 6-2: Environmental testing methods

1 Scope
This part of IEC 62715 specifies testing methods for evaluating the environmental endurance
of flexible display panels and modules for use, storage and transport under assumed usage
environment. This part of IEC 62715 is applicable to flexible display panels and modules such
as liquid crystal display devices (LCDs), electric paper display devices (EPDs), and organic
light emitting diode display devices (OLEDs). This part of IEC 62715 will also be suitable for
flexible panel or module with mechanical operation.
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 60068-1:2013, Environmental testing – Part 1: General and guidance
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 62341-6-2, Organic light emitting diode (OLED) displays – Part 6-2: Measuring methods
of visual quality and ambient performance
IEC 62341-6-3, Organic light emitting diode (OLED) displays – Part 6-3: Measuring methods
of image quality
IEC 62715-1-1, Flexible display devices – Part 1-1: Terminology and letter symbols
, Flexible display devices – Part 5-1:
...