IEC 62679-4-2:2016

Electronic paper displays - Part 4-2: Environmental test methods

IEC 62679-4-2:2016(E) specifies the environmental conditions to determine the environmental reliability of electronic paper display (EPD) panels and/or modules for storage under the assumed usage environment. The scope of this document is restricted to EPDs using either segment, passive, or active matrix with either monochromatic or colour type displays. The measuring methods are intended for EPDs operated in a reflective mode.

General Information

• Status: Published
• Publication Date: 28-Aug-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.120 - Electronic display devices
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 7 - TC 110/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 15-Dec-2016
• Completion Date: 29-Aug-2016

Standards Content (Sample)

IEC 62679-4-2 ®
Edition 1.0 2016-08
INTERNATIONAL
STANDARD
colour
inside
Electronic paper displays –
Part 4-2: Environmental test methods

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IEC 62679-4-2 ®
Edition 1.0 2016-08
INTERNATIONAL
STANDARD
colour
inside
Electronic paper displays –
Part 4-2: Environmental test methods

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120; 31.260 ISBN 978-2-8322-3607-9

– 2 – IEC 62679-4-2:2016 © IEC 2016
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 6
4 Measuring conditions . 7
4.1 Standard measuring environmental conditions . 7
4.2 Standard atmospheric conditions for reference measurements and tests . 7
4.3 Recovery conditions . 8
4.3.1 General . 8
4.3.2 Controlled recovery conditions . 8
4.3.3 Recovery procedure . 8
5 Measuring methods of environmental properties . 9
5.1 High temperature storage test . 9
5.1.1 Purpose . 9
5.1.2 Storage conditions . 9
5.2 Low temperature storage test . 9
5.2.1 Purpose . 9
5.2.2 Storage conditions . 9
5.3 Temperature shock test – Two chambers . 9
5.3.1 Purpose . 9
5.3.2 Storage conditions . 9
5.4 Specified change rate test of temperature – One chamber . 10
5.4.1 Purpose . 10
5.4.2 Storage conditions . 11
5.5 Combination temperature/humidity test . 12
5.5.1 Purpose . 12
5.5.2 Storage conditions . 12
5.6 Combination temperature/humidity cycle test . 12
5.6.1 Purpose . 12
5.6.2 Storage conditions . 12
5.6.3 Test cycle . 13
5.7 Low air pressure test . 16
5.7.1 Purpose . 16
5.7.2 Storage conditions . 17
5.8 Reporting . 17
6 Measuring methods of light exposure properties . 17
6.1 General remarks . 17
6.1.1 Overview . 17
6.1.2 Irradiance of the sunlight . 17
6.1.3 Spectral irradiance of the sunlight . 18
6.2 Conditioning . 18
6.2.1 General . 18
6.2.2 Temperature . 19
6.2.3 Humidity . 19
6.2.4 Surface contamination . 19
6.2.5 Mounting of device(s) . 19

6.2.6 Test facility . 19
6.2.7 Test apparatus . 19
6.2.8 Laboratory light source . 20
6.3 Procedures . 22
6.3.1 General . 22
6.3.2 Test patterns. 22
6.3.3 Measurements . 23
6.4 Light exposure testing . 23
6.4.1 General . 23
6.4.2 Procedure A – Direct sunlight . 23
6.4.3 Procedure B – Daylight through window glass . 23
6.4.4 Procedure C – Inner parts . 24
6.5 Reporting . 24
6.5.1 Information to be given in the relevant specification . 24
6.5.2 Reporting . 25
Bibliography . 26

Figure 1 – Temperature profile . 10
Figure 2 – Temperature profile . 11
Figure 3 – Combination temperature/humidity cycle followed by exposure to cold . 15
Figure 4 – Combination temperature/humidity cycle not followed by exposure to cold . 16
Figure 5 – Global solar spectral irradiance at sea level . 18
Figure 6 – Examples of test pattern for black and white EPD and for colour EPD . 23

Table 1 – Standard conditions for reference measurements and tests . 7
Table 2 – Spectral irradiance (condensed from CIE 085-1989, Table 4) . 18
a b
Table 3 – Relative spectral irradiance of xenon-arc lamps with daylight filters . 21
ab
Table 4 – Relative spectral irradiance for xenon-arc lamps with window glass filters . 22
Table 5 – Exposure cycles . 24

– 4 – IEC 62679-4-2:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRONIC PAPER DISPLAYS –
Part 4-2: Environmental test methods

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