1、 IEC 61947-2 Edition 1.0 2001-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Electronic projection Measurement and documentation of key performance criteria Part 2: Variable resolution projectors Projection lectronique Mesure et documentation des critres principaux de performance Partie 2: Projecteu
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16、on 1.0 2001-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Electronic projection Measurement and documentation of key performance criteria Part 2: Variable resolution projectors Projection lectronique Mesure et documentation des critres principaux de performance Partie 2: Projecteurs rsolution varia
17、ble INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE X ICS 33.160.60; 35.140; 37.020 PRICE CODE CODE PRIX ISBN 978-2-83220-597-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale War
18、ning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61947-2 IEC:2001 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope . 7 2 Normative references 7 3 Definitions 8 4 General
19、 requirements . 12 5 Light output measurement and specification 13 5.1 Light output specifications 14 5.1.1 Light output specification for projectors with a separate screen 14 5.1.2 Full-black light level specification . 15 5.1.3 Luminance specification for devices with an integral screen 15 5.2 Lig
20、ht output uniformity . 15 5.2.1 Example of a uniformity specification . 15 5.3 Contrast ratio . 15 5.4 Blanking measurement and specification 15 5.5 Effective blanking time . 16 5.6 Blanking specification 16 6 Variable resolution projector characteristics 17 6.1 Visual resolution measurement and spe
21、cification . 17 6.1.1 Description and general requirements 17 6.1.2 Horizontal resolution 17 6.1.3 Vertical resolution 18 6.1.4 Procedure 18 6.2 Video frequency response specifications 20 6.2.1 Frequency response specifications . 20 6.3 Viewing angle (half/gain) specification for devices with an int
22、egral screen 20 6.4 Input signal format compatibility . 20 6.5 Response time 20 6.6 Colour measurements 21 6.6.1 Colour chromaticity 21 6.6.2 Colour uniformity . 21 6.7 Keystone correction . 22 7 Range of focus and image size . 22 8 Audio characteristics . 22 9 Light source specification 22 10 Noise
23、: maximum sound level. 23 11 Power consumption 23 12 Weight 23 13 Dimensions . 23 14 Recommended practices . 23 14.1 Recommended practice 1 Sync hierarchy 23 14.2 Recommended practice 2 DC restoration 23 14.3 Recommended practice 3 Sync . 24 14.4 Recommended practice 4 Scan range labelling . 24 Anne
24、x A (normative) Figures 25 61947-2 IEC:2001 3 Annex B (normative) Pattern generator specifications . 29 Annex C (informative) Considerations in formulating this standard 30 C.1 General 30 C.2 Light output measurement. 30 C.3 Visual resolution measurement . 31 C.4 Possible causes for measurement erro
25、rs. 31 C.5 Input signal levels . 31 Annex D (normative) Complete sample specification . 33 Annex E (informative) Other issues, outside the scope of this standard, that may affect picture clarity 35 Annex F (informative) Possible causes of photometric measurement errors 36 F.1 Size of measured spot 3
26、6 F.2 Colour measurement 36 Annex G (normative) Alternative method for measuring resolution using the NIDL grille contrast method 37 Annex H (informative) Photometer precision and veiling glare . 39 H.1 Photometer precision 39 H.2 Integration time . 39 H.3 Veiling glare . 39 Annex I (informative) Li
27、ght measuring devices 41 Annex J (informative) Figure of merit for projection display colour gamut 42 Bibliography 44 Figure A.1 Test patterns/measurements set-up . 25 Figure A.2 Thirteen-point measuring grid 26 Figure A.3 Contrast measurement 26 Figure A.4 Vertical alternating lines 26 Figure A.5 H
28、orizontal alternating lines 27 Figure A.6 Resolution equipment set-up/depth of modulation measurement 27 Figure A.7 Sync and blanking timing . 28 Figure C.1 Simulation of lowered resolution 32 4 61947-2 IEC:2001 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRONIC PROJECTION MEASUREMENT AND DOCUME
29、NTATION OF KEY PERFORMANCE CRITERIA Part 2: Variable resolution projectors FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promot
30、e international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested
31、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. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with
32、 conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all intereste
33、d National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote internation
34、al unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the
35、latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
36、of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61947-2 has been prepared by subcommittee 100C: Audio, video and multimedia subsystems and equipment, of IEC technical committee 100: Audio, video and multimedia systems
37、and equipment. This bilingual version (2013-03) corresponds to the monolingual English version, published in 2001-09. The text of this standard is based on the following documents: FDIS Report on voting 100/268/FDIS 100/418/RVD Full information on the voting for the approval of this standard can be
38、found in the report on voting indicated in the above table. The French version of this standard has not been voted upon. Annexes A, B, D, and G form an integral part of this standard. Annexes C, E, F, H, I and J are for information only. This publication has been drafted in accordance with the ISO/I
39、EC Directives, Part 3. 61947-2 IEC:2001 5 The committee has decided that the contents of this publication will remain unchanged until 2004. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. 6 61947-2 IEC:2001 INTRODUCTION This standard was devel
40、oped to ensure a common, meaningful description of key performance parameters for variable resolution projectors (for example, CRT or laser projectors). The measurement methods and test signals correlate closely to typical uses involving computer-generated text and graphics displays. These measureme
41、nts evaluate the actual viewable image that emanates from variable resolution projectors. The resulting performance specifications are conservative in nature and allow any display device to be used beyond its rated specifications with degraded performance. The point at which this degraded performanc
42、e is no longer useful is highly subjective and strongly affected by the environment and the application. This standard is designed to specify a means of measuring and quantifying the performance of variable resolution projectors and is not intended to provide design goals for manufacturers of such e
43、quipment. 61947-2 IEC:2001 7 ELECTRONIC PROJECTION MEASUREMENT AND DOCUMENTATION OF KEY PERFORMANCE CRITERIA Part 2: Variable resolution projectors 1 Scope This part of IEC 61947 specifies requirements for measuring and documenting key performance parameters for CRT and laser-based projectors and ot
44、her variable resolution projectors that are capable of multiple variable resolutions and in which the image is raster- scanned. The provisions of this standard are designed to codify the measurement of the performance of variable resolution projectors and are not intended to provide design goals for
45、 manufacturers of such equipment. This standard is intended for variable resolution projectors (including projection displays that are capable of multiple variable resolutions) that are designed for use with primarily discrete colour (RGB) raster-scanned video, text, and graphics signals generated b
46、y computer equipment. NOTE These devices may also accept composite or component television video signals encoded to NTSC/RS170A, PAL, SECAM, or future HDTV, or ATV standards, which are fully described in their respective documentation and are not within the scope of this part of IEC 61947. In this p
47、art of IEC 61947, all of these signals are referred to as television video (TV video) (see IEC 60107-1 27). Displays with fixed resolutions (i.e. individual pixel light sources or matrix displays such as liquid crystal, DMD, plasma, or electroluminescent panels), are not fully addressed by this stan
48、dard, and reference should be made to IEC 61947-1. Factors outside the scope of this standard that may have a bearing on projector performance are listed in annex E. A discussion of considerations informing the development of standard appears in annex C. 2 Normative references The following normativ
49、e documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61947. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 61947 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated be
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