1、Electronic paper displaysPart 4-2: Environmental test methodsBS IEC 62679-4-2:2016BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of IEC 62679-4-2:2016.The UK participation in its preparation was entrust
2、ed to TechnicalCommittee EPL/47, Semiconductors.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Stan
3、dards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 90142 3 ICS 31.120; 31.260Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September
4、 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS IEC 62679-4-2:2016IEC 62679-4-2 Edition 1.0 2016-08 INTERNATIONAL STANDARD Electronic paper displays Part 4-2: Environmental test methods INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.120; 31.260 ISBN 978-2-8
5、322-3607-9 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colourinsideBS IEC 62679-4-2:2016 2 IEC 62679-4-2:2016 IEC 2016 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Terms and
6、 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 metho
7、ds 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 Spe
8、cified 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
9、 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.
10、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 BS IEC 62679-4-2:2016IEC 62679-4-2:2016 IEC 2016 3 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
11、 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
12、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 Glo
13、bal 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 Table 3 Relative spectral irradianc
14、e of xenon-arc lamps with daylight filters a b21 Table 4 Relative spectral irradiance for xenon-arc lamps with window glass filters ab22 Table 5 Exposure cycles 24 BS IEC 62679-4-2:2016 4 IEC 62679-4-2:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRONIC PAPER DISPLAYS Part 4-2: Envi
15、ronmental test 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 international co-operation on all questions concerning
16、 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 pre
17、paration 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
18、 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
19、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 techn
20、ical 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 exte
21、nt 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
22、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
23、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 ar
24、ising 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 i
25、s 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 62679-4-2 has been prepared by IEC technical committee 110: Electronic display
26、 devices. The text of this standard is based on the following documents: CDV Report on voting 110/730/CDV 110/773A/RVC 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 a
27、ccordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 62679 series, published under the general title Electronic paper displays, can be found on the IEC website. BS IEC 62679-4-2:2016IEC 62679-4-2:2016 IEC 2016 5 The committee has decided that the contents of this document wi
28、ll 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 i
29、ssued at a later date. IMPORTANT The colour inside logo on the cover page of this publication 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. BS IEC 62679-4-2:2016 6
30、 IEC 62679-4-2:2016 IEC 2016 ELECTRONIC PAPER DISPLAYS Part 4-2: Environmental test methods 1 Scope This part of IEC 62679 specifies the environmental conditions to determine the environmental reliability of electronic paper display (EPD) panels and/or modules for storage under the assumed usage env
31、ironment. 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. 2 Normative references The following documents are referred to in t
32、he 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 62679-1-1, Electronic paper displays
33、Part 1-1: Terminology IEC 62679-3-1, Electronic paper displays Part 3-1: Optical measuring methods IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60068-2-38:2009, Environmental testing Part 2: Tests Test Z/AD: Composite temperature/humidity cyclic test CIE 085-1989, Solar spectr
34、al irradiance 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 62679-1-1, IEC 60068-1 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/ww
35、w.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 3.1 air mass path length that light from a celestial object takes through the earths atmosphere relative to the length at the zenith where air mass = 1 Note 1 to entry: The air mass is 1/sin (gamma), where gamma is
36、the elevation angle of the sun. 3.2 black standard temperature temperature of an insulated stainless-steel plate, having a black coating BS IEC 62679-4-2:2016IEC 62679-4-2:2016 IEC 2016 7 Note 1 to entry: The black standard temperature represents the maximum surface temperature of specimens exposed
37、to radiation. Note 2 to entry: The black coated surface absorbs at least 90 % of the incident radiation flux below = 2 500 nm. Note 3 to entry: The plate is attached to a 5 mm thick baseplate made of a weather resistant polymer for the insulation. 3.3 black panel temperature temperature of an un-ins
38、ulated stainless-steel plate, having a black coating Note 1 to entry: The back of the metal plate is open to the atmosphere. 3.4 solar constant E0irradiance by the sunlight on a plane perpendicular to the incident radiation outside the earths atmosphere at the mean earth-sun distance Note 1 to entry
39、: The value of the solar constant is E0= 1 367 W/m2. 3.5 optical depth measure of how much light is absorbed when travelling through a medium Note 1 to entry: A completely transparent medium has an optical depth of zero. 4 Measuring conditions 4.1 Standard measuring environmental conditions Measurem
40、ents shall be carried out under the standard environmental conditions: temperature: 25 C 3 C, relative humidity: 25 %RH to 85 %RH, atmospheric pressure: 86 kPa to 106 kPa. When different environmental conditions are used, they shall be noted in the measurement report. 4.2 Standard atmospheric condit
41、ions 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 selecte
42、d values shall be noted in the relevant specifications. Table 1 Standard conditions for reference measurements and tests Temperature aRelative humidity a, bAir pressure aC % RH kPa 20, 25, 30, and 35 3 45 to 75 86 to 106 aIncluding extreme values. bAbsolute humidity 22 g/m3. BS IEC 62679-4-2:2016 8
43、IEC 62679-4-2:2016 IEC 2016 4.3 Recovery conditions 4.3.1 General After the conditioning period and before making the final measurements, the specimens should be allowed to stabilize at the ambient temperature, i.e. the temperature at which the measurements are to be made. The controlled recovery co
44、nditions (see 4.3.2) shall be applied if the electrical parameters to be measured are affected by the absorbed humidity or surface conditions of the specimens and change rapidly, for example if the insulation resistance rises considerably within approximately 2 h after removal of the specimens from
45、a humidity chamber. If the electrical parameters of the specimens affected by the absorbed humidity or surface conditions do not vary rapidly, recovery may be carried out in the conditions of 4.2. If recovery and measurements are performed in separate chambers, the combination of temperature and hum
46、idity conditions shall be such that condensation on the surface of the specimens does not occur when the specimen is transferred to the measurement chamber. Most test procedures give the appropriate recovery conditions and duration. These conditions apply unless otherwise prescribed by the relevant
47、specification. 4.3.2 Controlled recovery conditions The controlled recovery conditions are as follows: Temperature: actual laboratory temperature 1 C provided that it is within the limits fixed in 4.2, that is, between + 15 C and + 35 C. Relative humidity: between 45 % and 75 %. Air pressure: betwee
48、n 86 kPa and 106 kPa. Recovery period: to be stated in the relevant specification if different from that given in the appropriate method of test. If, for specific cases, different recovery conditions are necessary, they shall be prescribed by the relevant specification. 4.3.3 Recovery procedure The
49、specimen shall be placed in the recovery chamber within 10 min of removal from the conditioning environment. Where the relevant specification requires measurements to be made immediately after the recovery period, these measurements shall be completed within 30 min of removal from the recovery chamber. Those characteristics which are expected to change most rapidly after the specimen is removed from the recovery atmosphere shall
