1、INTERNATIONALSTANDARDIEC61947-1First edition2002-08Electronic projection Measurement and documentationof key performance criteria Part 1:Fixed resolution projectorsReference numberIEC 61947-1:2002(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SU
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8、ON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONALSTANDARDIEC61947-1First edition2002-08Electronic projection Measurement and documentationof key performance criteria Part 1:Fixed resolution projectors IEC 2002 Copyright-all rights reserve
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11、 BOOK SUPPLY BUREAU.2 61947-1 IEC:2002(E)CONTENTSFOREWORD.3INTRODUCTION.41Scope.52Normative references.53Definitions.64General requirements.105Light output measurement and specification.115.1Light output specifications.125.2Light output uniformity.135.3Contrast ratio.135.4Light transmission for fixe
12、d resolution projection systems:liquid-crystalimaging devices(LCD)used with an overhead projector(OHP).135.5Small area contrast ratio for alternating black and white pixel lines.146Fixed resolution projectors characteristics.156.1Displayable format(IEC resolution).156.2Aspect ratio.156.3Viewing angl
13、e(half/gain)specification for devices with an integral screen.156.4Input signal format compatibility.166.5Response time.166.6Colour measurements.166.7Number of colours.176.8Keystone correction.177Range of focus and image size.178Audio characteristics.189Light source specification.1810Maximum acousti
14、cal noise level.1811Power consumption.1812Weight.1813Dimensions.1914Sync hierarchy Recommended practice.19Annex A(normative)Figures.20Annex B(normative)Pattern generator specifications.23Annex C(informative)Considerations in formulating this standard.24Annex D(normative)Complete sample specification
15、.26Annex E(informative)Conversion equations.27Annex F(informative)Possible causes of photometric measurement errors.28Annex G(informative)Photometer precision and veiling glare.29Annex H(informative)Light measuring devices.31Annex I(Informative)Figure of merit for projection display colour gamut.32B
16、ibliography.34LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61947-1 IEC:2002(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION_ELECTRONIC PROJECTION MEASUREMENT AND DOCUMENTATION OFKEY PERFORMANCE CRITERIAPart 1:Fixed resolution projectorsFOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardization comprisingall national electrotechnical committees(IEC National Committees).The object of
