1、BSI Standards PublicationPlasma display panelsPart 2-6: Measuring methods APL dependent gamma and colour characteristicsBS IEC 61988-2-6:2015National forewordThis British Standard is the UK implementation of IEC 61988-2-6:2015.The UK participation in its preparation was entrusted to TechnicalCommitt
2、ee 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 Standards Institution 2015
3、.Published by BSI Standards Limited 2015ISBN 978 0 580 82647 4ICS 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 April 2015.Amendments/corrigenda issued
4、since publicationDate Text affectedBRITISH STANDARDBS IEC 61988-2-6:2015IEC 61988-2-6 Edition 1.0 2015-03 INTERNATIONALSTANDARD Plasma display panels Part 2-6: Measuring methods APL dependent gamma and colourcharacteristics INTERNATIONALELECTROTECHNICALCOMMISSION ICS 31.260 ISBN 978-2-8322-2399-4 Re
5、gistered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colourinside 2 IEC 61988-2-6:2015 IEC 2015 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Terms, definitions and abbreviations 6 3.1
6、Terms and definitions 6 3.2 Abbreviations 7 4 Measurement equipment 7 4.1 Video signal generator 7 4.2 Non-contact LMD (light measurement device) 7 4.3 Contact LMD . 7 5 Measurement conditions 7 5.1 General . 7 5.2 Setup conditions . 7 5.3 Measuring layout . 8 5.4 Input signal level and picture leve
7、l . 9 6 Measuring methods of tone characteristics . 10 6.1 Purpose 10 6.2 Input signals . 11 6.2.1 General 11 6.2.2 11-step grey bar with fixed APL 11 6.2.3 Single grey window with fixed APL 12 6.2.4 11-step RGB bar and single colour window with fixed APL 13 6.3 Measuring procedure . 14 6.4 Expressi
8、on of results . 15 6.4.1 Measurement report . 15 6.4.2 Gamma calculation . 16 7 Measuring methods of colour gamut by APL . 19 7.1 Purpose 19 7.2 Primary and secondary colour patterns by APL 19 7.3 Measuring procedure . 19 7.4 Evaluation of colour accuracy 20 7.5 Evaluation of colour gamut 20 7.6 Exp
9、ression of results . 21 Annex A (informative) Use of ITU-R Rec. BT.709-5 signal . 25 Bibliography . 26 Figure 1 Measuring layout for non-contact measurement 8 Figure 2 Measuring layout for contact measurement . 9 Figure 3 Input signals and signal processing in a PDP module 10 Figure 4 An example of
10、an 11-step grey-bar pattern 12 Figure 5 Example of 4 % window pattern for measuring the tone characteristics 12 Figure 6 RGB bar and single window pattern 13 Figure 7 An example of results of gamma characteristics for each APL . 15 Figure 8 Example plots for calculated gamma values by APL 17 BS IEC
11、61988-2-6:2015IEC 61988-2-6:2015 IEC 2015 3 Figure 9 Example plots for CCT characteristics by APL . 18 Figure 10 Example plots for uv characteristics by APL . 18 Figure 11 4 % C, M, and Y single window pattern . 19 Figure 12 ITU-R Rec. BT.709-5 standard coordinates of primary and secondary colours .
12、 20 Figure 13 Example showing a measured primary, a reference, and an overlapped gamut area . 21 Figure 14 The measured colour gamut plots by APL . 24 Table 1 An example of a tone measurement report . 15 Table 2 Example of gamma reporting form (for each APL ) 17 Table 3 An example of gamut areas for
13、 evaluation of colour gamut . 21 Table 4 An example of primary and secondary colour measurement report 22 Table A.1 Digital data and signal level in ITU-R Rec. BT.709-5 . 25 BS IEC 61988-2-6:2015 4 IEC 61988-2-6:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PLASMA DISPLAY PANELS Part 2-6
14、: Measuring methods APL dependent gamma and colour characteristics 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 internatio
15、nal co-operation on all questions concerning 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 ref
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21、y. Independent certification bodies provide 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.
22、 7) No liability shall attach to IEC or its 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
23、costs (including legal fees) and expenses arising 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 app
24、lication of this publication. 9) Attention is 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 61988-2-6 has been prepared by IEC
25、 technical committee 110: Electronic display devices. The text of this standard is based on the following documents: FDIS Report on voting 110/636/FDIS 110/652/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This
26、 publication has been drafted in accordance with the ISO/IEC Directives, Part 2. BS IEC 61988-2-6:2015IEC 61988-2-6:2015 IEC 2015 5 A list of all the parts in the IEC 61988 series, under the general title Plasma display panels, can be found on the IEC website. The committee has decided that the cont
27、ents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual ve
28、rsion 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 understanding of its contents. Users should therefore print this document using a colou
29、r printer. BS IEC 61988-2-6:2015 6 IEC 61988-2-6:2015 IEC 2015 PLASMA DISPLAY PANELS Part 2-6: Measuring methods APL dependent gamma and colour characteristics 1 Scope This part of IEC 61988 defines the measuring methods for gamma and colour gamut characteristics as a function of the APL for a PDP m
30、odule (plasma display module). Generally, the luminance level of a PDP module is dependent on the APL (average picture level) of input images. Varying the input levels causes a change of the chromaticity of RGB primary colours. This standard also defines the measuring methods of tone characteristics
31、 and chromaticity characteristics with varying APLs. This standard is based on the assumption that the inverse-gamma circuit is inside the module. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applicatio
32、n. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60107-1, Methods of measurement on receivers for television broadcast
33、 transmissions Part 1: General considerations Measurements at radio and video frequencies IEC 61966-5, Multimedia system and equipment Colour measurement and management Part 5: Equipment using plasma display panels IEC 61988-1, Plasma display panels Part 1: Terminology and letter symbols IEC 61988-2
34、-1, Plasma display panels Part 2-1: Measuring methods Optical and optoelectrical CIE 15:2004, Colorimetry ITU-R Rec. BT.709-5, Parameter values for the HDTV standards for production and international programme exchange 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes
35、 of this document, the terms and definitions given in IEC 60068-1, IEC 60107-1 and IEC 61988-1, as well as the following apply. 3.1.1 tone characteristics of the relationship between input signal level and output luminance BS IEC 61988-2-6:2015IEC 61988-2-6:2015 IEC 2015 7 3.1.2 colour difference di
36、fference between two colour stimuli, defined as the Euclidean distance between the points representing them in a specific colour space such as CIE 1976 uv colour space. 3.1.3 colour gamut area two-dimensional maximum area of reproducible colours expressed in the CIE 1976 colour space defined in CIE
37、15 3.2 Abbreviations For the purposes of this document, the following abbreviations apply. APL Average picture level CCT Correlated colour temperature LMD Light measuring device PDP Plasma display 4 Measurement equipment 4.1 Video signal generator An analogue video signal generator or a digital vide
38、o signal generator is used. The signal characteristics shall match with the measured PDP module. Input signal, in this document, means a pre-gamma signal and APL means a post-gamma APL. 4.2 Non-contact LMD (light measurement device) When using a non-contact LMD, the non-contact LMD incorporates a sp
39、ectroradiometer or a non-contact colorimeter as shown in Figure 1. The detail conditions are defined in IEC 61988-2-1, where a non-contact LMD is described as an LMD. NOTE: See IEC 61966-5. 4.3 Contact LMD When using a contact LMD, the measurement probe shall be placed perpendicular to the display s
40、urface and include at least 500 pixels in the measurement aperture. It shall be confirmed that the results measured by the contact LMD are the same as the results measured by the non-contact LMD. 5 Measurement conditions 5.1 General The following standard setup conditions shall be used. Each conditi
41、on shall be noted on the relevant specification whenever any different conditions other than the standard setup conditions are applied. (See the measuring conditions in IEC 61966-5 and IEC 61988-2-1.) 5.2 Setup conditions All measurements shall be carried out in a dark room. Illuminance shall be les
42、s than 1 lx anywhere on the screen of the PDP module. When this illuminance significantly affects the measurement of the black level, the background subtraction method shall be used. When a BS IEC 61988-2-6:2015 8 IEC 61988-2-6:2015 IEC 2015 different illuminance or the background subtraction method
43、 is used, this shall be noted on the report. The warm-up time shall be longer than 30 minutes with a signal input set at 15 % grey level on full screen without gamma correction, unless other specified measuring methods are used. When different warm-up conditions are used, they shall be noted on the
44、report. For the measurement of tone characteristics, the conditions of contrast and colour enhancement functions to preserve the tone characteristics of the panel itself shall be applied and noted on the report. The image sticking preventing function (for a still image) shall be turned off, or some
45、procedures in which the function is kept inactive can be applied. 5.3 Measuring layout The measuring equipment shall be set as shown in Figure 1 for a non-contact LMD and in Figure 2 for a contact LMD. The optical axis of the non-contact LMD should be normal to the centre of the display surface. It
46、is recommended that the measuring distance 0 of LMD is 2,5V, where V is the effective screen height of the display. Figure 1 Measuring layout for non-contact measurement The measuring layout for a contact LMD is shown in Figure 2. A measurement probe shall be set to the surface of the display. IEC L
47、MD PDP module Measuring distance 0Control PC (if used) Pattern generator VBS IEC 61988-2-6:2015IEC 61988-2-6:2015 IEC 2015 9 Figure 2 Measuring layout for contact measurement 5.4 Input signal level and picture level For the measurement, analogue video signals or digital video signals are used as inp
48、ut signals. The input signal level is the level of the analogue video signal and is indicated in percent (0 % to 100 %, I0 %to I100 %respectively), while the conventional digital input data is the level of the digital input video signal having a value from 0 to 2N-1, where N is the number of the bit
49、s for the digital video signal. When N is 8, 256 grey steps are used. Basically these input video signals are pre-gamma signals having an applied gamma correction of 2,2. The output luminance level is related to 2,2thpower of the input signal level. The term picture level, which relates to luminance, is used for the output luminance level of the post-gamma signal. Figure 3 shows these relationships. NOTE In the ITU-R Rec. BT.709-5 8-bit di
