ISO INTERNATIONAL STANDARD 9241-391 Firstedition 2016-02-01 Ergonomics of human-system interaction - Part 391: Requirements, analysis and compliance test methods for the reduction of photosensitive seizures Ergonomie de I'interaction homme-systeme- Partie 391: Exigences, analyses et methodes d'essai de conformité pour la reduction des saisies photosensibles Reference number IS0 9241-391:2016(E) SO International Organization for Standardization @ IS0 2016 TANDARDIZATION C1 5956617 ed without license from IHS IS0 9241-391:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS02016,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 copyright@iso.org www.iso.org Intenationai br PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZoISQ s.6 - All rights reserved I by IHS unde Not for Resale, 2016/4/26 01:58:56 etworking permitted without license from IHS IS0 9241-391:2016(E) Contents Page Foreword ..iv Introduction. ..vii 1 Scope. 2 Normative references ..1 3 Terms and definitions ..1 4 Image factors of photosensitive seizures ..2 5 Ergonomic requirements and recommendations .3 5.1 General .3 5.2 Flashes .3 5.2.1 Potentiallyharmful flashes .3 5.2.2 Rapid changes of image sequences 4 5.2.3 Potentially harmful red flashes 4 5.2.4 Cumulativerisk .4 5.2.5 Prior warning. 4 5.3 Potentiallyharmful regularpatterns 4 6 Conformance .5 6.1 General. .5 6.2 Testmethods ..5 6.3 Procedure of conformance .6 AnnexA (informative)0verviewoftheIs09241-series .7 AnnexB(informative)Abbreviatedterms ..8 Annex C (informative) Clinical aspects of photosensitivity .9 Annex D (informative) Viewing environments ..10 AnnexE (informative) Saturated red ..11 Annex F (informative) Typical relation between screen luminance and signal voltage. ..12 Annex G (informative) Sample procedure for assessing applicability and conformance ..13 Bibliography. .15 iii STANDARDIZATIONC15956617 thout license from IHS