1、Flexible display devices Part 5-2: Measuring methods of optical characteristics from the vantage point for curved displays PD IEC/TS 62715-5-2:2016 BSI Standards PublicationNational foreword This Published Document is the UK implementation of IEC/TS 62715-5-2:2016. The UK participation in its prepar
2、ation was entrusted to Technical Committee EPL/47, Semiconductors. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applica
3、tion. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 89737 5 ICS 31.120 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Com
4、mittee on 30 June 2016. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD IEC/TS 62715-5-2:2016 IEC TS 62715-5-2 Edition 1.0 2016-04 TECHNICAL SPECIFICATION Flexible display devices Part 5-2: Measuring methods of optical characteristics from the vantage point fo
5、r curved displays INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.120 ISBN 978-2-8322-3300-9 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside PD IEC/TS 62715-5-2:2016 2 IEC TS 62
6、715-5-2:2016 IEC 2016 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Terms, definitions and abbreviations 6 3.1 Terms and definitions 6 3.2 Abbreviations 8 4 Standard measuring equipment 8 4.1 Video signal generator 8 4.2 Non-contact LMD 8 5 Standard measuring conditions 9 5.1 Standard
7、measuring environmental conditions . 9 5.2 Power supply 9 5.3 Warm-up time . 9 5.4 Standard measuring dark room conditions . 9 5.5 Adjustment of display modules 9 5.6 Measuring geometry for vantage point . 10 5.6.1 General . 10 5.6.2 Measuring geometry in horizontal vantage point . 10 5.6.3 Measurin
8、g geometry in vertical vantage point . 10 5.7 Measuring layout for viewing position 11 5.7.1 General . 11 5.7.2 Measuring layout by moving LMD . 11 5.7.3 Measuring layout by rotating the display module . 12 5.8 Minimum curvature radius for the measurement . 13 5.9 Screen visual angle . 14 5.9.1 Scre
9、en visual angle of a flat display module . 14 5.9.2 Screen visual angle of concave type display module . 14 6 Measuring methods of optical characteristics 15 6.1 General . 15 6.1.1 Measuring items . 15 6.1.2 Measuring point locations . 15 6.1.3 Test pattern . 16 6.2 Measuring method . 17 6.2.1 Measu
10、ring method at the screen centre position . 17 6.2.2 Measuring method at viewing angle position . 18 6.3 Optical characteristics of white box by viewing angle . 18 6.3.1 Luminance variation by viewing angle . 18 6.3.2 Contrast ratio variation by viewing angle . 19 6.3.3 Chromaticity variation by vie
11、wing angle 20 6.4 Optical characteristics of colour box by viewing angle 20 6.4.1 Colour gamut area variation by viewing angle . 20 6.4.2 Chromaticity variation and by viewing angle . 21 6.5 Uniformity and uniformity variation . 22 6.5.1 General . 22 6.5.2 Luminance uniformity and uniformity variati
12、on by viewing angle 23 6.5.3 Chromaticity uniformity and uniformity variation by viewing angle 23 PD IEC/TS 62715-5-2:2016IEC TS 62715-5-2:2016 IEC 2016 3 6.6 Half-luminance and half-contrast viewing angle 23 6.6.1 Half-luminance viewing angle range . 23 6.6.2 Half-contrast viewing angle range . 24
13、7 Reporting 24 7.1 Requirements of reporting . 24 7.2 Recommendations of measurement results reporting . 25 Bibliography . 30 Figure 1 Measuring layout for non-contact measurement 9 Figure 2 Measuring geometry in horizontal vantage point (top view) 10 Figure 3 Measuring geometry in vertical vantage
14、point (side view) 11 Figure 4 Measuring geometry by horizontal viewing angles (top view) . 12 Figure 5 Measuring geometry by horizontal display directions (top view) . 13 Figure 6 Minimum concave type curvature radius for the measurement (top view) 14 Figure 7 Screen visual angle of concave type dis
15、play device (top view) . 15 Figure 8 9-point locations for vantage-point measurement 16 Figure 9 Nine white boxes for vantage-point measurement 16 Figure 10 Nine measuring points for vantage-point black measurement . 17 Figure 11 Nine-colour boxes of R, G and B for vantage-point measurement 17 Figur
16、e 12 Measuring directions of 9 vantage points 17 Figure 13 Measuring directions (right side) by viewing angle 0 o , 15 o , 30 o and 45 o. 18 Figure 14 Measuring directions (right side) by viewing angle 0, 15, 30 and 45 (front upper view) 18 Figure 15 Measuring method for half-luminance viewing angle
17、 23 Table 1 Example of measurement results for the optical characteristics. 26 Table 2 Calculation results from the measurement data of Table 1 28 PD IEC/TS 62715-5-2:2016 4 IEC TS 62715-5-2:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FLEXIBLE DISPLAY DEVICES Part 5-2: Measuring method
18、s of optical characteristics from the vantage point for curved displays 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 inter
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29、 International Standards. In exceptional circumstances, a technical committee may propose the publication of a technical specification when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts, or the subject is still under technical deve
30、lopment or where, for any other reason, there is the future but no immediate possibility of an agreement on an International Standard. Technical specifications are subject to review within three years of publication to decide whether they can be transformed into International Standards. IEC TS 62715
31、-5-2, which is a technical specification, has been prepared by IEC technical committee 110: Electronic display devices. PD IEC/TS 62715-5-2:2016IEC TS 62715-5-2:2016 IEC 2016 5 The text of this standard is based on the following documents: Enquiry draft Report on voting 110/715/DTS 110/739/RVC Full
32、information on the voting for the approval of this technical specification can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 62715 series, published under the general
33、title Flexible display devices, can be found on the IEC website. 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, th
34、e publication will be transformed into an International standard, reconfirmed, withdrawn, replaced by a revised edition, or amended. 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 understandi
35、ng of its contents. Users should therefore print this document using a colour printer. PD IEC/TS 62715-5-2:2016 6 IEC TS 62715-5-2:2016 IEC 2016 FLEXIBLE DISPLAY DEVICES Part 5-2: Measuring methods of optical characteristics from the vantage point for curved displays 1 Scope This part of IEC 62715,
36、which is a technical specification, specifies the general rules and the details of optical measuring methods from a fixed point (the so-called vantage point) for curved emissive and transmissive type displays such as OLED and LCD in dark room conditions. This document focuses on concave shape large
37、screen displays (non-portable) around a horizontal and/or vertical axis with fixed or variable curvature radius. The measuring method stipulated in this technical specification is applied to the curved display modules under the following states: vantage-point luminance variation by viewing angles va
38、ntage-point contrast ratio variation by viewing angles vantage-point chromaticity variation of white colour by viewing angles vantage-point colour gamut area variation by viewing angles vantage-point chromaticity variation of primary colours by viewing angles luminance uniformity and its uniformity
39、variation by viewing angles chromaticity uniformity and its uniformity variation by viewing angles viewing angle of half-luminance viewing angle of half-contrast 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for
40、 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 62715-1-1, Flexible display devices Part 1-1: Terminology and letter symbols 3 Terms, definitions and abbreviations 3.
41、1 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 62715-1-1 as well as the following apply. 3.1.1 curved display display that has a single curvature radius along the screen horizontally and/or vertically Note 1 to entry: The curvature radius of each sc
42、reen position is fixed by the manufacturer or user controllable curvature radius. Note 2 to entry: The direction of curvature might be concave or convex from the viewers position. PD IEC/TS 62715-5-2:2016IEC TS 62715-5-2:2016 IEC 2016 7 Note 3 to entry: The curved screen display is also called curve
43、d display, as in curved TV and curved monitor. 3.1.2 vantage-point measurement test configuration in which measurements are taken at various measuring points on the display screen through a common observation point in space in front of the screen Note 1 to entry: The observer (at the viewing distanc
44、e D) is at a fixed point, the so-called vantage point or viewing point, and then from that fixed vantage point, the angle of view from the screen centre to the corners is changed according to human viewing directions toward the screen. Note 2 to entry: In this document, the vantage point for the mea
45、surement is located on the same horizontal plane as the display centre, and on a line between the display centre and the displays axis of rotation. 3.1.3 screen visual angle maximum range of vantage-point viewing directions VAmeasured from the vantage point towards the edges of the display Note 1 to
46、 entry: The horizontal screen visual angle is the range of vantage-point viewing directions between the left and right edges of the screen. Note 2 to entry: The vertical screen visual angle is the range of vantage-point viewing directions between the top and bottom edges of the screen. 3.1.4 viewing
47、 angle angle between the normal direction of the screen surface and the measurement or viewing direction Note 1 to entry: If there is no indication about the screen position, the viewing angle is based on the screen centre. Note 2 to entry: The horizontal viewing angle is the angle between the scree
48、n normal direction and the vantage point, both lying on the same horizontal plane. Note 3 to entry: The vertical viewing angle is the angle between the screen normal direction and the vantage point, both lying on the same vertical plane. 3.1.5 luminance variation by viewing angle percent difference
49、of display white luminance, between normal incidence (at 0 viewing angle) and a specific viewing angle at each screen measuring point or averaged over the screen measuring points 3.1.6 contrast ratio variation by viewing angle percent difference of contrast ratio between normal incidence (at 0 viewing angle) and a specific viewing angle at each screen measuring point or averaged over the screen measuring points 3.1.7 chromaticity variation by viewing angl
