1、 IEC 62679-3-1 Edition 1.0 2014-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Electronic paper displays Part 3-1: Optical measuring methods Afficheurs de papier lectroniques Partie 3-1: Mthodes de mesures optiques IEC 62679-3-1:2014-04(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Co
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19、 sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 62679-3-1 Edition 1.0 2014-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Electronic paper displays Part 3-1: Optical measuring methods Afficheurs de papier lectroniques Partie 3-1: Mthodes de mesures optiques INTERN
20、ATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XA ICS 31.120; 31.260 PRICE CODE CODE PRIX ISBN 978-2-8322-1515-9 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that
21、 you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 IEC 62679-3-1:2014 IEC 2014 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms, definitions and abbreviations
22、. 7 3.1 Terms and definitions . 7 3.2 Abbreviations . 8 4 Standard measuring conditions 8 4.1 Standard measuring environmental conditions . 8 4.2 Viewing direction coordinate system 8 4.3 Standard lighting conditions . 9 4.3.1 General comments and remarks on the measurement of electronic paper displ
23、ays 9 4.3.2 Dark-room conditions 9 4.3.3 Standard ambient illumination spectra 10 4.3.4 Standard illumination geometries 11 4.4 Standard conditions of measuring equipment . 16 4.4.1 General 16 4.4.2 Adjustment of EPD . 16 4.4.3 Conditions of measuring equipment 16 4.4.4 Contact measurements with int
24、egrated illumination/detection instruments . 17 4.5 Working standards and references . 18 4.5.1 Diffuse reflectance standard . 18 4.5.2 Specular reflectance standard 18 4.6 Standard locations of measurement field 19 4.6.1 Matrix displays 19 4.6.2 Segment displays . 19 5 Optical measuring methods . 2
25、0 5.1 Reflection measurements . 20 5.1.1 Purpose 20 5.1.2 Measuring conditions 20 5.1.3 Measuring the hemispherical diffuse spectral reflectance factor 20 5.1.4 Measuring the reflectance factor for a directed light source 22 5.2 Display photometric in-plane uniformity 23 5.2.1 Purpose 23 5.2.2 Measu
26、ring equipment . 23 5.2.3 Measurement method . 23 5.2.4 Definitions and evaluations . 24 5.3 Contrast ratio . 24 5.3.1 Purpose 24 5.3.2 Measuring equipment . 24 5.3.3 Measurement method . 24 5.3.4 Definitions and evaluations . 25 5.4 Ambient contrast ratio 25 5.4.1 Purpose 25 5.4.2 Measuring conditi
27、ons 25 IEC 62679-3-1:2014 IEC 2014 3 5.4.3 Measuring method 25 5.5 Cross-talk 26 5.5.1 Purpose 26 5.5.2 Measuring equipment . 26 5.5.3 Greyscale matrix displays . 26 5.5.4 Black and white (two-level) matrix displays . 28 5.6 Display colour, colour gamut, and colour gamut area . 28 5.6.1 Purpose 28 5
28、.6.2 Measuring equipment . 28 5.6.3 Measurement method . 29 5.6.4 Definitions and evaluations . 29 5.6.5 Display colour gamut 30 5.6.6 Display colour gamut area 30 5.7 Display colorimetric in-plane uniformity 32 5.7.1 Purpose 32 5.7.2 Measuring equipment . 32 5.7.3 Measurement method . 32 5.7.4 Defi
29、nitions and evaluations . 33 5.8 Daylight display colour . 34 5.8.1 Purpose 34 5.8.2 Measuring conditions 34 5.8.3 Measuring method 34 5.9 Daylight colour gamut volume 35 5.9.1 Purpose 35 5.9.2 Measuring conditions 35 5.9.3 Measuring method 35 5.9.4 Reporting 37 5.10 Viewing direction dependence 37
30、5.10.1 Purpose 37 5.10.2 Measuring conditions 37 5.10.3 Measuring method 38 5.10.4 Definitions and evaluations . 39 5.11 Ghosting 41 5.11.1 Purpose 41 5.11.2 Measuring equipment . 41 5.11.3 Measuring method 41 5.11.4 Definitions and evaluations . 42 Annex A (informative) Calculation method of daylig
31、ht colour gamut volume . 43 A.1 Purpose . 43 A.2 Procedure for calculating the colour gamut volume 43 A.3 Surface subdivision method for CIELAB gamut volume calculation . 45 A.3.1 Purpose 45 A.3.2 Assumptions . 45 A.3.3 Algorithm 45 A.3.4 Software example . 45 Bibliography 50 4 IEC 62679-3-1:2014 IE
32、C 2014 Figure 1 Representation of the viewing direction, or direction of measurement, defined by the angle of inclination, and the angle of rotation (azimuth angle) in a polar coordinate system . 9 Figure 2 Illustrated examples for directional illumination 12 Figure 3 Example of the measuring setup
33、using directional illumination where S= 40 and R= 30 12 Figure 4 Example of the ring light illumination measuring setup where S = 35 5 and R= 20 13 Figure 5 Detailed schematic of ring light characteristics . 14 Figure 6 Example of measurement geometries for hemispherical illumination using an integr
34、ating sphere (left) and sampling sphere (right) 15 Figure 7 Layout diagram of measurement setup . 17 Figure 8 Standard measurement positions . 19 Figure 9 Window pattern for cross-talk measurement . 27 Figure 10 Example of display colour gamut 30 Figure 11 Example of evaluation results for the colou
35、r gamut area on the a*b* plane of the CIELAB colour space 32 Figure 12 An example of range in colours produced by a given display as represented by the CIELAB colour space 36 Figure 13 Illumination/detection geometry for measuring the viewing direction properties of the display 38 Figure 14 Example
36、of contrast ratio dependence on viewing direction 40 Figure 15 Display pattern used to characterize ghosting. . 42 Figure A.1 Analysis flow chart for calculating the colour gamut volume 43 Figure A.2 Graphical representation of the colour gamut volume for sRGB in the CIELAB colour space 44 Table 1 E
37、igenvalues M 1and M 2for CIE daylight Illuminants D50 and D75 21 Table 2 Input signals for CIELAB and CIE UCS uv colour gamut area measurements 31 Table 3 Example data of in-plane colour non-uniformity . 33 Table 4 Example of minimum colours required for gamut volume calculation of a 3- primary 8-bi
38、t display . 35 Table 5 Measured tristimulus values for the minimum set of colours (see Table 4) required for gamut volume calculation under the specified daylight illumination conditions . 37 Table 6 Colour gamut volume in the CIELAB colour space . 37 Table 7 Example format used for reporting viewin
39、g direction performance . 41 Table A.1 Tristimulus values of the sRGB primary colours . 44 Table A.2 Example of sRGB colour set represented in the CIELAB colour space . 44 Table A.3 Example of sRGB colour gamut volume in the CIELAB colour space 45 IEC 62679-3-1:2014 IEC 2014 5 INTERNATIONAL ELECTROT
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