1、 IEC 62341-6-2 Edition 2.0 2015-12 INTERNATIONAL STANDARD Organic light emitting diode (OLED) displays Part 6-2: Measuring methods of visual quality and ambient performance IEC 62341-6-2:2015-12(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, Switzerland All rig
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11、: Measuring methods of visual quality and ambient performance INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.260 ISBN 978-2-8322-3026-8 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour
12、 inside 2 IEC 62341-6-2:2015 IEC 2015 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms, definitions and abbreviations . 7 3.1 Terms and definitions 7 3.2 Abbreviations 10 4 Structure of measuring equipment . 10 5 Standard measuring conditions 10 5.1 Standard measuring environmental c
13、onditions 10 5.2 Standard lighting conditions 10 5.2.1 Dark-room conditions . 10 5.2.2 Ambient illumination conditions 11 5.3 Standard setup conditions . 16 5.3.1 General . 16 5.3.2 Adjustment of OLED display modules 16 5.3.3 Starting conditions of measurements . 16 5.3.4 Conditions of measuring equ
14、ipment . 16 6 Visual inspection of static images 17 6.1 General . 17 6.2 Classification of visible defects . 17 6.2.1 General . 17 6.2.2 Reference examples for subpixel defects . 17 6.2.3 Reference example for line defects 19 6.2.4 Reference example for mura defects . 19 6.3 Visual inspection method
15、 and criteria 20 6.3.1 Standard inspection conditions 20 6.3.2 Standard inspection method 21 6.3.3 Inspection criteria 23 7 Electro-optical measuring methods under ambient illumination 24 7.1 Reflection measurements 24 7.1.1 Purpose . 24 7.1.2 Measuring conditions . 24 7.1.3 Measuring the hemispheri
16、cal diffuse reflectance 25 7.1.4 Measuring the reflectance factor for a directional light source 26 7.2 Ambient contrast ratio . 28 7.2.1 Purpose . 28 7.2.2 Measuring conditions . 28 7.2.3 Measuring method . 28 7.3 Display daylight colour 29 7.3.1 Purpose . 29 7.3.2 Measuring conditions . 29 7.3.3 M
17、easuring method . 29 7.4 Daylight colour gamut volume . 30 7.4.1 Purpose . 30 7.4.2 Measuring conditions . 30 7.4.3 Measuring method . 31 IEC 62341-6-2:2015 IEC 2015 3 7.4.4 Reporting . 32 Annex A (informative) Measuring relative photoluminescence contribution from displays 34 A.1 Purpose 34 A.2 Mea
18、suring conditions 34 A.3 Measuring the bi-spectral photoluminescence of the display . 34 A.4 Determining the relative PL contribution from the display 34 Annex B (informative) Diagnostic for observing display luminance dependence from ambient illumination 37 B.1 Purpose 37 B.2 Measuring method 37 An
19、nex C (informative) Calculation method of daylight colour gamut volume . 38 C.1 Purpose 38 C.2 Procedure for calculating the colour gamut volume . 38 C.3 Surface subdivision method for CIELAB gamut volume calculation 40 C.3.1 Purpose . 40 C.3.2 Assumptions 40 C.3.3 Algorithm . 40 C.3.4 Software exam
20、ple execution 40 Bibliography 46 Figure 1 Example of visual inspection room setup for control of ambient room lighting and reflections 11 Figure 2 Example of measurement geometries for a uniform hemispherical diffuse illumination condition using an integrating sphere and sampling sphere 13 Figure 3
21、Directional source measurement geometry using an isolated source 15 Figure 4 Directional source measurement geometry using a ring light source . 15 Figure 5 Layout diagram of measurement setup . 16 Figure 6 Classification of visible defects 17 Figure 7 Bright subpixel defects . 18 Figure 8 Criteria
22、for classifying bright and dark subpixel defects 19 Figure 9 Bright and dark line defects 19 Figure 10 Sample image of line mura 20 Figure 11 Example of spot mura 20 Figure 12 Setup condition for visual inspection of electro-optical visual defects . 22 Figure 13 Shape of scratch and dent defect . 24
23、 Figure 14 Example of range in colours produced by a given display as represented by the CIELAB colour space . 32 Figure A.1 Scaled bi-spectral photoluminescence response from a display 35 Figure A.2 Decomposed bi-spectral photoluminescence response from a display . 35 Figure B.1 Example of display
24、luminance reduction caused by the high illuminance from a high intensity LED flashlight directed at the display surface . 37 Figure C.1 Analysis flow chart for calculating the colour gamut volume 38 Figure C.2 Graphical representation of the colour gamut volume for sRGB in the CIELAB colour space 39
25、 Table 1 Definitions for types of scratch and dent defects . 24 4 IEC 62341-6-2:2015 IEC 2015 Table 2 Eigenvalues M 1and M 2for CIE daylight Illuminants D50 and D75 . 26 Table 3 Example of minimum colours required for gamut volume calculation of a 3- primary 8-bit display . 31 Table 4 Measured trist
26、imulus values for the minimum set of colours (see Table 3) required for gamut volume calculation under the specified ambient illumination condition . 33 Table 5 Calculated white point in the darkened room and daylight ambient condition . 33 Table 6 Colour gamut volume in the CIELAB colour space . 33
27、 Table C.1 Tristimulus values of the sRGB primary colours . 39 Table C.2 Example of sRGB colour set represented in the CIELAB colour space 39 Table C.3 Example of sRGB colour gamut volume in the CIELAB colour space . 40 IEC 62341-6-2:2015 IEC 2015 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ORGANI
28、C LIGHT EMITTING DIODE (OLED) DISPLAYS Part 6-2: Measuring methods of visual quality and ambient performance FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees).
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39、dard IEC 62341-6-2 has been prepared by IEC technical committee 110: Electronic display devices. This second edition cancels and replaces the first edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect
40、 to the previous edition: a) Contents of 7.4 are changed. b) Contents and items of Annex C are changed. c) Annex B is added. 6 IEC 62341-6-2:2015 IEC 2015 The text of this standard is based on the following documents: FDIS Report on voting 110/695/FDIS 110/718/RVD Full information on the voting for
41、the approval of this standard can be found in the report on voting indicated in the above table. A list of all parts of the IEC 62341 series, published under the general title Organic light emitting diode (OLED) displays, can be found on the IEC website. This publication has been drafted in accordan
42、ce with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be rec
43、onfirmed, 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 logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understan
44、ding of its contents. Users should therefore print this document using a colour printer. IEC 62341-6-2:2015 IEC 2015 7 ORGANIC LIGHT EMITTING DIODE (OLED) DISPLAYS Part 6-2: Measuring methods of visual quality and ambient performance 1 Scope This part of IEC 62341 specifies the standard measurement
45、conditions and measurement methods for determining the visual quality and ambient performance of organic light emitting diode (OLED) display modules and panels. This document mainly applies to colour display modules. 2 Normative references The following documents, in whole or in part, are normativel
46、y referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050 (all parts), International Electrotechnical Vocabulary (a
47、vailable at www.electropedia.org) IEC 61966-2-1, Multimedia systems and equipment Colour measurement and management Part 2-1: Colour management Default RGB colour space - sRGB IEC 62341-1-2, Organic light emitting diode (OLED) displays Part 1-2: Terminology and letter symbols CIE 15:2004, Colorimetr
48、y 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050-845 and IEC 62341-1-2, as well as the following apply. 3.1.1 visual inspection means for checking image quality by human visual observation for classific
49、ation and comparison against limit sample criteria 3.1.2 subpixel defects all or part of a single subpixel, the minimum colour element, which is visibly brighter or darker than surrounding subpixels of the same colour. Note 1 to entry: Further classifications of subpixel defects are made depending on the number and configuration of multiple subpixel defects within a region of the display. Note 2 to entry: For monochromatic displays, the term “dot defect” m
