1、BRITISH STANDARD BS EN 61947-2:2002 Electronic projection Measurement and documentation of key performance criteria Part 2: Variable resolution projectors The European Standard EN 61947-2:2002 has the status of a British Standard ICS 33.160.60; 35.140; 37.020 NO COPYING WITHOUT BSI PERMISSION EXCEPT
2、 AS PERMITTED BY COPYRIGHT LAWBS EN 61947-2:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 16 April 2002 BSI 16 April 2002 ISBN 0 58
3、0 39439 5 National foreword This British Standard is the official English language version of EN 61947-2:2002. It is identical with IEC 61947-2:2001. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment, which has the
4、 responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the sect
5、ion entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.
6、 Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor r
7、elated international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 45 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issue
8、d. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 61947-2 NORME EUROPENNE EUROPISCHE NORM February 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Cen
9、tral Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61947-2:2002 E ICS 33.160.60;35.140;37.020 English version Electronic projection Measurement and documentation of key per
10、formance criteria Part 2: Variable resolution projectors (IEC 61947-2:2001) Projection lectronique Mesure et documentation des critres principaux de performance Partie 2: Projecteurs rsolution variable (CEI 61947-2:2001) Elektronische Projektion Messung und Dokumentation wichtiger Leistungsmerkmale
11、Teil 2: Projektoren variabler Auflsung (IEC 61947-2:2001) This European Standard was approved by CENELEC on 2001-11-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard wit
12、hout any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other langu
13、age made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France,
14、 Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN 64917-:20022 - 2 - Foreword The text of document 100/268/FDIS, future edition 1 of IEC 61947-2, prepared by SC 100C, Audio, video and multimedia subsystems an
15、d equipment, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61947-2 on 2001-11-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of
16、 an identical national standard or by endorsement (dop) 2002-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-11-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information
17、 only. In this standard, annexes A, B, D, G and ZA are normative and annexes C, E, F, H, I and J are informative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61947:2001 was approved by CENELEC as a European Standard without any modification. In
18、 the official version, for Bibliography, the following notes have to be added for the standards indicated: ISO 9241-8 NOTE Harmonized as EN ISO 9241-8:1997 (not modified). IEC 60107-1 NOTE Harmonized as EN 60107-1:1997 (not modified). _ Page2 EN619472:2002 BSI16April2002CONTENTS INTRODUCTION 5 1 Sco
19、pe 6 2 Normative references. 6 3 Definitions 7 4 General requirements11 5 Light output measurement and specification 12 5.1 Light output specifications13 5.1.1 Light output specification for projectors with a separate screen.13 5.1.2 Full-black light level specification .14 5.1.3 Luminance specifica
20、tion for devices with an integral screen14 5.2 Light output uniformity14 5.2.1 Example of a uniformity specification14 5.3 Contrast ratio.14 5.4 Blanking measurement and specification14 5.5 Effective blanking time.15 5.6 Blanking specification 15 6 Variable resolution projector characteristics.16 6.
21、1 Visual resolution measurement and specification16 6.1.1 Description and general requirements 16 6.1.2 Horizontal resolution 16 6.1.3 Vertical resolution 17 6.1.4 Procedure 17 6.2 Video frequency response specifications 19 6.2.1 Frequency response specifications.19 6.3 Viewing angle (half/gain) spe
22、cification for devices with an integral screen.19 6.4 Input signal format compatibility .19 6.5 Response time.19 6.6 Colour measurements20 6.6.1 Colour chromaticity 20 6.6.2 Colour uniformity20 6.7 Keystone correction .21 7 Range of focus and image size21 8 Audio characteristics.21 9 Light source sp
23、ecification21 10 Noise: maximum sound level.22 11 Power consumption.22 12 Weight22 13 Dimensions.22 14 Recommended practices.22 14.1 Recommended practice 1 Sync hierarchy 22 14.2 Recommended practice 2 DC restoration.22 14.3 Recommended practice 3 Sync .23 14.4 Recommended practice 4 Scan range labe
24、lling23 Page3 EN619472:2002 BSI16April2002Annex A (normative) Figures 24 Annex B (normative) Pattern generator specifications .28 Annex C (informative) Considerations in formulating this standard 29 C.1 General.29 C.2 Light output measurement.29 C.3 Visual resolution measurement30 C.4 Possible cause
25、s for measurement errors.30 C.5 Input signal levels .30 Annex D (normative) Complete sample specification.32 Annex E (informative) Other issues, outside the scope of this standard, that may affect picture clarity.34 Annex F (informative) Possible causes of photometric measurement errors 35 F.1 Size
26、of measured spot.35 F.2 Colour measurement.35 Annex G (normative) Alternative method for measuring resolution using the NIDL grille contrast method 36 Annex H (informative) Photometer precision and veiling glare .38 H.1 Photometer precision 38 H.2 Integration time.38 H.3 Veiling glare38 Annex I (inf
27、ormative) Light measuring devices 40 Annex J (informative) Figure of merit for projection display colour gamut 41 Annex ZA (normative) Normative references to international publications with their corresponding European publications 45 Bibliography 43 Figure A.1 Test patterns/measurements set-up.24
28、Figure A.2 Thirteen-point measuring grid 25 Figure A.3 Contrast measurement 25 Figure A.4 Vertical alternating lines.25 Figure A.5 Horizontal alternating lines.26 Figure A.6 Resolution equipment set-up/depth of modulation measurement 26 Figure A.7 Sync and blanking timing .27 Figure C.1 Simulation o
29、f lowered resolution 31 Page4 EN619472:2002 16April2002INTRODUCTION This standard was developed 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 close
30、ly to typical uses involving computer-generated text and graphics displays. These measurements 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
31、rated specifications with degraded performance. The point at which this degraded performance 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 re
32、solution projectors and is not intended to provide design goals for manufacturers of such equipment. Page5 EN619472:2002 BSI16April2002ELECTRONIC PROJECTION MEASUREMENT AND DOCUMENTATION OF KEY PERFORMANCE CRITERIA Part 2: Variable resolution projectors 1 Scope This part of IEC 61947 specifies requi
33、rements for measuring and documenting key performance parameters for CRT and laser-based projectors and other 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 measure
34、ment of the performance of variable resolution projectors and are not intended to provide design goals for 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
35、 for use with primarily discrete colour (RGB) raster-scanned video, text, and graphics signals generated by 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 des
36、cribed in their respective documentation and are not within the scope of this part of IEC 61947. In this part 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 display
37、s such as liquid crystal, DMD, plasma, or electroluminescent panels), are not fully addressed by this standard, 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 consideratio
38、ns informing the development of standard appears in annex C. 2 Normative references The following normative 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 the
39、se 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 below. For undated references, the latest edition of the normative document referred to
40、 applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60050(845):1987, International Electrotechnical Vocabulary (IEV) Chapter 845: Lighting IEC 61947-1, Electronic projection Measurement and documentation of key performance criteria Part 1: Fixed resolu
41、tion projectors 1) _ 1) To be published. Page6 EN619472:2002 BSI16April2002ISO 3741:1999, Acoustics Determination of sound power levels of noise sources using sound pressure Precision methods for reverberation rooms ISO 7779:1999, Acoustics Measurement of airborne noise emitted by information techno
42、logy and telecommunications equipment 3 Definitions For the purposes of this part of IEC 61947, the following definitions apply. 3.1 active matrix display display that uses switches at each pixel to select those pixels to which a voltage will be applied 3.2 active viewing area horizontal and vertica
43、l dimensions in millimetres (inches) of the boundary of the array of pixels. It may also be expressed in square millimetres or square inches 3.3 aperture ratio (fill factor) light transmitting/reflecting area of a pixel times the number of pixels divided by the active viewing area (light transmittin
44、g area and light blocking area) 3.4 aspect ratio proportions of a projected picture area, for example, the width compared to the height. It is usually expressed in standard ratios such as 4:3, 16:9, or others 3.5 blanking process of the beam turning off (blanking) which occurs during horizontal and
45、vertical retrace (flyback) 3.6 CIE Commission Internationale de lEclairage (International Commission on Illumination) NOTE The CIE is an organization devoted to international cooperation and exchange of information among its member countries on all matters relating to the art and science of lighting
46、. 3.7 CIE chromaticity values Cartesian coordinates used to define a colour in CIE colour space NOTE The 1931 chromaticity values are designated x and y. In 1976, the CIE defined a more uniform colour space. The 1976 CIE chromaticity values are u and v . 3.8 colour mapping means for accurately displ
47、aying colour signals or altering sets of colour signals in a controlled manner 3.9 contrast ratio luminance or illuminance ratio of a light area of the image to the dark area of the same image Page7 EN619472:2002 BSI16April20023.10 correlated colour temperature (CCT) of the white-point temperature,
48、in kelvins, of the black-body radiator, the chromaticity of which is closest to the chromaticity of a particular light, for example from a display screen, as measured in the 1960 CIE (u, v) uniform chromaticity space NOTE An algorithm for computing the CCT of the white-point, either from 1931 CIE (x
49、, y) coordinates or from 1960 (u, v) coordinates, appears in Wyszecki and Stiles 1. A graphical nomogram also appears in this work. Alternatively, a successful numerical approximation has been derived by C. S. McCamy 2. Given CIE 1931 coordinates (x, y), McCamys approximation is CCT = 437 n3 + 3 601 n2 + 6 831 n + 5 517, where n = (x - 0,3320)/(0,1858 y). This approximation, the second of three proposed, is close enough for any practica
