ISO-9241-7-1998.pdf
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1、AReference number ISO 9241-7:1998(E) INTERNATIONAL STANDARD ISO 9241-7 First edition 1998-04-01 Ergonomic requirements for office work with visual display terminals (VDTs) Part 7: Requirements for display with reflections Exigences ergonomiques pour travail de bureau avec terminaux crans de visualis
2、ation (TEV) Partie 7: Exigences daffichage concernant les rflexions Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/28/2007 10:00:26 MDTNo reproduction or networking permitted without li
3、cense from IHS -,-,- ISO 9241-7:1998(E) ISO 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. I
4、nternational Organization for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internetcentraliso.ch X.400c=ch; a=400net; p=iso; o=isocs; s=central Printed in Switzerland ii ContentsPage 1 Scope1 2 Normative references1 3 Definitions and symbols .2 4 Guiding principles .7 5 Performance o
5、bjectives 7 6 Requirements.7 7 Measurements and calculations 9 8 Compliance.16 Annex A: Alternative test method.18 Annex B: Graphical report format.22 Annex C: Worked example.26 Annex D: Bibliography.31 Copyright International Organization for Standardization Provided by IHS under license with ISO L
6、icensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/28/2007 10:00:26 MDTNo reproduction or networking permitted without license from IHS -,-,- ISOISO 9241-7:1998(E) iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodi
7、es (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations
8、, governmental and non- governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulate
9、d to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 9241-7 was prepared by Technical Committee ISO/TC 159, Ergonomics, Subcommittee SC 4, Ergonomics of human system interaction.
10、 ISO 9241 consists of the following parts, under the general title Ergonomic requirements for office work with visual display terminals (VDTs): Part 1: General Introduction Part 2: Guidance on task requirements Part 3: Visual display requirements Part 4: Keyboard requirements Part 5: Workstation lay
11、out and postural requirements Part 6: Environmental requirements Part 7: Requirements for display with reflections Part 8: Requirements for displayed colours Part 9: Requirements for non-keyboard input devices Part 10: Dialogue principles Part 11: Guidance on usability Part 12: Presentation of infor
12、mation Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/28/2007 10:00:26 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 9241-7:1998(E) ISO iv Part 13: User
13、guidance Part 14: Menu dialogues Part 15: Command dialogues Part 16: Direct manipulation dialogues Part 17: Form-filling dialogues Annexes A, B, C and D of this part of ISO 9241 are for information only. Copyright International Organization for Standardization Provided by IHS under license with ISO
14、Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/28/2007 10:00:26 MDTNo reproduction or networking permitted without license from IHS -,-,- ISOISO 9241-7:1998(E) v Introduction Visual display terminals (VDTs) are subject to reflections of environmental luminance and illuminance from
15、 the display device surfaces. Under some conditions, the reflections become disturbing to the user and affect both comfort and task performance. The objective of this part of ISO 9241 is to maintain usable and acceptable VDT image quality in luminous environ- ments that can cause reflections from th
16、e screen. The document is intended for evaluators and users of VDTs. It is intended to be used with ISO 8995, ISO 9241-3, ISO 9241-6 and ISO 9241-8 to provide guidance for the visual ergonomics of the VDT workplace. Compliance with this part of ISO 9241 is dependent on the hardware characteristics o
17、f the VDT, except for polarity that can be application- dependent. This part of ISO 9241 contains requirements and methods for measurement of the image quality of VDTs used in luminous environments that can cause specular and diffuse reflections from the screen. ISO 9241-3 and ISO 9241-8 contain req
18、uirements that deal with luminance and luminance ratios for VDT images measured under conditions that exclude specular reflections. These parts of ISO 9241 interact with this part of ISO 9241. VDTs that meet the interacting requirements and recommendations of ISO 9241-3 and ISO 9241-8 do not necessa
19、rily meet those of this part ISO 9241 and vice versa. ISO 9241-6 and ISO 8995 contain specific recommendations concerning design of the workplace luminous environment to minimize sources of glare. The luminous environment conditions used to determine compliance with this part of ISO 9241 are drawn f
20、rom, or are consistent with recommendations and requirements of these International Standards. The luminous environment values used to determine compliance to this part of ISO 9241 do not constitute specific recommendations or requirements for workplace lighting. The burden of a visually acceptable
21、VDT workplace is a tradeoff between the display hardware and the VDT environment. To acknowledge that tradeoff, compliance with this part of ISO 9241 has been developed in three classes, each with rules for decision based on environmental assumptions. Although the decision rules are not expected to
22、be exactly duplicated in the workplace environment, they do correspond approximately to general types of workplace environment to which VDTs are expected to be suitable: Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards
23、1/9972545001 Not for Resale, 04/28/2007 10:00:26 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 9241-7:1998(E) ISO vi ClassEnvironment Isuitable for general office use IIsuitable for most, but not all, office environments IIIrequiring a specially controlled luminous en
24、vironment for use An alternative test method is provided for VDTs whose characteristics preclude use of the quantitative test method. NOTE ISO 13406 extends the definitions, requirements, and test method of this part of ISO 9241 for flat panels whose colour and/or luminance contrast is strongly depe
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