IEC 62715-5-1-2017 Flexible display devices - Part 5-1 Measuring methods of optical performance《软性显示装置 第5-1部分 光学性能的测量方法》.pdf

《IEC 62715-5-1-2017 Flexible display devices - Part 5-1 Measuring methods of optical performance《软性显示装置 第5-1部分 光学性能的测量方法》.pdf》由会员分享，可在线阅读，更多相关《IEC 62715-5-1-2017 Flexible display devices - Part 5-1 Measuring methods of optical performance《软性显示装置 第5-1部分 光学性能的测量方法》.pdf（54页珍藏版）》请在麦多课文档分享上搜索。

1、 IEC 62715-5-1 Edition 1.0 2017-05 INTERNATIONAL STANDARD Flexible display devices Part 5-1: Measuring methods of optical performance IEC 62715-5-1:2017-05(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specifie

2、d, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requester. If you have any questions about I

3、EC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varemb Fax: +41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch S

4、witzerland www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is

5、kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. IEC Catalogue - webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards

6、, Technical Specifications, Technical Reports and other documents. Available for PC, Mac OS, Android Tablets and iPad. IEC publications search - www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,). It also

7、gives information on projects, replaced and withdrawn publications. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published details all new publications released. Available online and also once a month by email. Electropedia - www.electropedia.o

8、rg The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French, with equivalent terms in 16 additional languages. Also known as the International Electrotechnical Vocabulary (IEV) online. IEC Glossary - std.iec.ch/glossary 65

9、000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002. Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR. IEC Customer Service Centre - webstore.iec.ch/csc If you wi

10、sh to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 62715-5-1 Edition 1.0 2017-05 INTERNATIONAL STANDARD Flexible display devices Part 5-1: Measuring methods of optical performance INTERNATIONAL ELECTROTECHNICAL COMMI

11、SSION ICS 31.120 ISBN 978-2-8322-4354-1 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 62715-5-1:2017 IEC 2017 CONTENTS FOREWORD . 5 INTRODUCTION . 7 1 Scope 8 2 Normative

12、 references 8 3 Terms, definitions and abbreviated terms 8 3.1 Terms and definitions 8 3.2 Abbreviated terms . 9 4 Structure of measuring equipment . 9 4.1 Measuring configuration Display mounting . 9 4.1.1 General . 9 4.1.2 Display mounting for uniformity measurements 10 4.1.3 Display mounting for

13、viewing direction measurements . 10 4.2 Light measuring device . 11 4.3 Light source configurations . 13 4.3.1 General . 13 4.3.2 Uniform hemispherical diffuse illumination . 13 4.3.3 Directed source illumination . 14 5 Standard measuring conditions 15 5.1 Standard measuring environmental conditions

14、 15 5.2 Standard lighting conditions 15 5.2.1 Dark room conditions . 15 5.2.2 Standard ambient illumination spectra . 15 5.2.3 Standard illumination geometries . 17 5.2.4 Diffuse reflectance standard 17 5.3 Standard setup conditions . 17 5.3.1 Adjustment of display modules 17 5.3.2 Starting conditio

15、ns of measurements . 17 5.3.3 Conditions of measuring equipment . 18 5.4 Standard locations of measurement field. 18 6 Optical measuring methods in dark room conditions 18 6.1 Luminance and its uniformity. 18 6.1.1 General . 18 6.1.2 Measuring equipment 19 6.1.3 Screen centre luminance measuring met

16、hod 19 6.1.4 Luminance uniformity measuring method . 19 6.1.5 Luminance uniformity definition and evaluation 20 6.2 Contrast ratio 20 6.2.1 General . 20 6.2.2 Measuring equipment 20 6.2.3 Measuring method . 20 6.2.4 Definition and evaluation . 20 6.3 Chromaticity, colour uniformity, and colour gamut

17、 area . 21 6.3.1 General . 21 6.3.2 Measuring equipment 21 6.3.3 Screen centre chromaticity measuring method . 21 6.3.4 Screen centre colour gamut and colour gamut area measuring method 22 IEC 62715-5-1:2017 IEC 2017 3 6.3.5 Colour uniformity measuring method 24 6.4 Peak white field correlated colou

18、r temperature 25 6.4.1 General . 25 6.4.2 Measuring equipment 25 6.4.3 Measuring method . 25 6.5 Viewing direction dependence . 25 6.5.1 General . 25 6.5.2 Measuring equipment 25 6.5.3 Measuring method . 26 6.5.4 Definition and evaluation . 27 6.6 Cross-talk with display in bent state 28 6.6.1 Gener

19、al . 28 6.6.2 Measuring equipment 28 6.6.3 Measuring method . 29 7 Optical measuring method under ambient illumination . 31 7.1 Reflection measurements 31 7.1.1 General . 31 7.1.2 Measuring conditions . 32 7.2 Ambient contrast ratio . 35 7.2.1 General . 35 7.2.2 Measuring conditions . 36 7.2.3 Measu

20、ring method . 36 7.3 Ambient display colour 36 7.3.1 General . 36 7.3.2 Measuring conditions . 37 7.3.3 Measuring method . 37 7.4 Ambient colour gamut volume . 38 7.4.1 General . 38 7.4.2 Measuring conditions . 38 7.4.3 Measuring method . 38 7.4.4 Reporting . 40 Annex A (informative) Calculation met

21、hod of ambient colour gamut volume . 42 A.1 Purpose 42 A.2 Procedure for calculating the colour gamut volume . 42 A.3 Surface subdivision method for CIELAB gamut volume calculation 44 A.3.1 Purpose . 44 A.3.2 Assumptions 44 A.3.3 Algorithm . 44 A.3.4 Software example execution 45 Bibliography 49 Fig

22、ure 1 Example of the coordinate system used for a convex display of a constant radius of curvature about the y-axis 10 Figure 2 Top view example of how a convex display can be rotated within the measurement field 10 Figure 3 Top view example of display mount that rotates in the x-z plane for viewing

23、 direction measurements 11 Figure 4 Optical characteristics of a spot photometer, colorimeter, or spectroradiometer . 12 4 IEC 62715-5-1:2017 IEC 2017 Figure 5 Example of the relationship between measurement field diameter and inclinations angles 13 Figure 6 Example of reflection measurement geometr

24、ies for spherical illumination 14 Figure 7 Example of convex display illuminated by a directed light source . 14 Figure 8 Example of convex display illuminated by a ring light source 15 Figure 9 Standard measurement positions . 18 Figure 10 Test pattern used for 4 % area window measurements . 19 Fig

25、ure 11 Examples of the colour gamut as represented in two common chromaticity diagrams . 23 Figure 12 Example of contrast ratio dependence on viewing direction 27 Figure 13 Cross-talk pattern with diagonal 4 % white window boxes on grey background . 29 Figure 14 Cross-talk pattern with diagonal 4 %

26、black window boxes on grey background . 30 Figure 15 Cross-talk pattern with perpendicular 4 % white window boxes on grey background . 30 Figure 16 Cross-talk pattern with perpendicular 4 % black window boxes on grey background . 31 Figure 17 Example of the range in colours produced by a display 40

27、Figure A.1 Analysis flow chart for calculating the colour gamut volume . 42 Figure A.2 Graphical representation of the colour gamut volume for sRGB in the CIELAB colour space 43 Table 1 Input signals for CIELAB, CIE 1931 and CIE 1976 UCS colour gamut measurements 22 Table 2 Example of CIE 1976 UCS c

28、hromaticity non-uniformity 24 Table 3 Example format used for reporting viewing direction performance . 28 Table 4 Eigenvalues M 1and M 2for CIE daylight Illuminants D50 and D75 33 Table 5 An example of minimum colours required for gamut volume calculation of a 3-primary 8-bit display 39 Table 6 Mea

29、sured tristimulus values for the minimum set of colours . 41 Table 7 Calculated white point in the dark room and ambient illumination conditions 41 Table 8 Colour gamut volume in the CIELAB colour space 41 Table A.1 Tristimulus values of the sRGB primary colours . 43 Table A.2 Example of sRGB colour

30、 set represented in the CIELAB colour space 43 Table A.3 Example of sRGB colour gamut volume in the CIELAB colour space . 44 IEC 62715-5-1:2017 IEC 2017 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FLEXIBLE DISPLAY DEVICES Part 5-1: Measuring methods of optical performance FOREWORD 1) The Internati

31、onal 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 standardization in the electrical and electroni

32、c 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 preparation is entrusted to technical committees; a

33、ny 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 with the International Organization for Standa

34、rdization (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 subjects since each technical committee has rep

35、resentation 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 technical content of IEC Publications is accurate, I

36、EC 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 extent possible in their national and regional publ

37、ications. 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 conformity assessment services and, in some are

38、as, 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 directors, employees, servants or agents includ

39、ing 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 arising out of the publication, use of, or relian

40、ce 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 is drawn to the possibility that some of the ele

41、ments 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 62715-5-1 has been prepared by IEC technical committee 110: Electronic display devices. The text of this International Standa

42、rd is based on the following documents: FDIS Report on voting 110/859/FDIS 110/870/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 Direc

43、tives, Part 2. A list of all parts of the IEC 62715 series, published under the general title Flexible display devices, can be found on the IEC website. 6 IEC 62715-5-1:2017 IEC 2017 The committee has decided that the contents of this document will remain unchanged until the stability date indicated

44、 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. IMPORTANT The colour inside log

45、o 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. IEC 62715-5-1:2017 IEC 2017 7 INTRODUCTION This part of IEC 62715 was designe

46、d for the standardization of measuring methods and detailed setup conditions that are used to characterize the optical performance of flexible display devices. The surface conditions and shape of flexible displays can change depending on the application. For example, a smart watch may have a fixed c

47、onvex display, a cell phone or TV a fixed concave display, and a bendable display may have either a concave or convex shape with a variable radius of curvature. Up to now, all of these displays would usually be characterized in their flat state. However, since it is possible that mechanical stress i

48、nduced by bending the display can change its optical characteristics, the display should be measured in its designed bent state. This ensures that the displays optical performance is representative of its intended application. This document specifies the necessary conditions and methods to measure t

49、he optical performance of a display in a bent state. 8 IEC 62715-5-1:2017 IEC 2017 FLEXIBLE DISPLAY DEVICES Part 5-1: Measuring methods of optical performance 1 Scope This part of IEC 62715 specifies the standard measuring conditions and measuring methods for determining the optical performance of flexible displays in the dark or under ambient illumination. This document mainly applies to display modules that are bendable about one axis. The dis