IEC 62595-1-2-2016 Display lighting unit - Part 1-2 Terminology and letter symbols《显示照明装置 第1-2部分 术语和文字符号》.pdf

1、 IEC 62595-1-2 Edition 2.0 2016-02 INTERNATIONAL STANDARD Display lighting unit Part 1-2: Terminology and letter symbols IEC 62595-1-2:2016-02(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of

2、 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 either IEC or IECs member National Committee in the country of the requester. If you have any questions about IEC copyright

3、or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varemb Fax: +41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland ww

4、w.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under co

5、nstant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. IEC Catalogue - webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards, Technical S

6、pecifications, Technical Reports and other documents. Available for PC, Mac OS, Android Tablets and iPad. IEC publications search - www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,). It also gives informa

7、tion on projects, replaced and withdrawn publications. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published details all new publications released. Available online and also once a month by email. Electropedia - www.electropedia.org The worlds

8、 leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French, with equivalent terms in 15 additional languages. Also known as the International Electrotechnical Vocabulary (IEV) online. IEC Glossary - std.iec.ch/glossary 65 000 electrote

9、chnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002. Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR. IEC Customer Service Centre - webstore.iec.ch/csc If you wish to give us

10、 your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 62595-1-2 Edition 2.0 2016-02 INTERNATIONAL STANDARD Display lighting unit Part 1-2: Terminology and letter symbols INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.120; 31.260 I

11、SBN 978-2-8322-3170-8 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 62595-1-2:2016 IEC 2016 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references. 5 3 Terms and definiti

12、ons 5 3.1 Classification of terms . 5 3.2 Fundamental terms . 5 3.3 Terms related to passive optical components . 9 3.4 Terms related to solid-state light sources . 13 3.4.1 Light-emitting diode (LED) 13 3.4.2 LED light bar 14 3.5 Terms related to frontlight units . 15 3.6 Terms related to performan

13、ces and specifications 16 3.7 Terms related to backlight dimming . 18 4 Letter symbols (quantity symbols / unit symbols) 20 Annex A (informative) Supplementary figures . 21 Figure A.1 Backlighting concept for transmissive and transflective LCDs . 21 Figure A.2 Examples of edge-lit backlight units .

14、21 Figure A.3 Example of a direct-lit backlight unit 22 Figure A.4 Visual definition of the terms related to passive optical components such as bezel and case . 22 Figure A.5 Luminance uniformity on a backlight unit . 23 Figure A.6 Polar coordinate system for evaluation of the angular luminance dist

15、ribution 23 Figure A.7 Angular luminance on a backlight unit 24 Figure A.8 Examples of spectral power distribution of a display lighting unit 24 Figure A.9 Incoherent light spread function for evaluation of optical characteristics of a block in a block-wise dynamic backlight unit . 24 Figure A.10 Li

16、ght spread functions of three BLUs with different optical structures . 25 Figure A.11 Checkerboard pattern for evaluation of the luminance uniformity in a BLU . 26 Table 1 Letter symbols (quantity symbols / unit symbols) 20 IEC 62595-1-2:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ DI

17、SPLAY LIGHTING UNIT Part 1-2: Terminology and letter symbols FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co

18、operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred

19、to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in thi

20、s preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an internationa

21、l consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable ef

22、forts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publica

23、tions transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. In

24、dependent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) N

25、o liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs

26、 (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct applicat

27、ion of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62595-1-2 has been prepared by IEC tech

28、nical committee 110: Electronic display devices. This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) change in the serie

29、s title in order to handle frontlight units; b) new terms are added considering recent advances in display lighting unit (DLU) technology; c) some of terms and definitions are corrected and revised, particularly to be consistent with IEC 62595-2; d) some of the terms and definitions are corrected an

30、d revised, particularly to be consistent with IEC 60050 policy; 4 IEC 62595-1-2:2016 IEC 2016 e) clause structure is rectified for categorizing terms correctly; f) some of figures in Annex A are added or revised for better understanding. The text of this standard is based on the following documents:

31、 FDIS Report on voting 110/720/FDIS 110/734/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC

32、62595 series, under the general title Display lighting unit, can be found on the IEC website. Future standards in this series will carry the new general title as cited above. Titles of existing standards in this series will be updated at the time of the next edition. The committee has decided that t

33、he contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A biling

34、ual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a

35、 colour printer. IEC 62595-1-2:2016 IEC 2016 5 DISPLAY LIGHTING UNIT Part 1-2: Terminology and letter symbols 1 Scope This part of IEC 62595 gives the preferred terms, their definitions and symbols for display lighting units (DLUs) such as backlight units (BLUs) of transmissive and transflective LCD

36、s, and frontlight units (FLUs) of reflective LCDs and electronic paper (E-paper) displays, with the object of using the same terminology when publications are prepared in different countries. 2 Normative references The following documents, in whole or in part, are normatively referenced in this docu

37、ment and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-845, International Electrotechnical Vocabulary Part 845: Lighting 3 Terms and defi

38、nitions For the purposes of this document, the terms and definitions given in IEC 60050-845 1as well as the following apply. 3.1 Classification of terms Terms for display lighting units (DLUs), such as backlight units (BLUs) and frontlight units (FLUs) are classified as follows: a) fundamental terms

39、 related to display lighting units (3.2); b) terms related to passive optical components used in display lighting units (3.3); c) terms related to solid-state light sources used in display lighting units (3.4); d) terms related particularly to frontlight units (3.5); e) terms related to performances

40、 and specifications (3.6); f) terms related to backlight dimming (3.7). The following definitions are applied for international standardization of the backlight units. 3.2 Fundamental terms 3.2.1 display lighting unit DLU lighting unit for recognition of the displayed images on a non-emissive electr

41、onic display device _ 1Identical to CIE 17.4. 6 IEC 62595-1-2:2016 IEC 2016 3.2.2 backlight unit BLU display lighting unit that is set at the rear of a non-emissive electronic display device such as a transmissive or transflective liquid crystal (LC) device Note 1 to entry: For an example, see Figur

42、e A.1. 3.2.3 edge-lit backlight unit side-lit backlight unit edge-light backlight unit side-light backlight unit backlight unit in which an optically transparent medium (typically light-guide plate) is used in proximity with the light source(s) for introducing the light into the medium from one or s

43、everal sides of the medium to illuminate an LC device Note 1 to entry: For an example, see Figure A.2. 3.2.4 direct-lit backlight unit direct-view backlight unit backlight unit in which a light chamber is used in combination with light source(s) that are mounted inside the chamber, for illuminating

44、a transmissive LC device mounted on the light chamber for the purpose of image recognition Note 1 to entry: For an example, see Figure A.3. 3.2.5 side-driven direct-lit backlight unit backlight unit in which a light chamber is used in combination with light sources(s) that are mounted on the inner s

45、ides of the light chamber for illuminating a panel mounted on the light chamber for the purpose of image recognition 3.2.6 static backlight unit single or integrated flat illumination system that operates with direct or alternative current and possesses a unique optical characteristic 3.2.7 dynamic

46、backlight unit single or integrated illumination units that possess a unique electro-optical characteristic which is synchronized with the local picture and its contents displayed on an LC device 3.2.8 blinking backlight unit backlight unit that is periodically switched on and off for synchronically

47、 illuminating an LC device 3.2.9 scanning backlight unit backlight unit that is divided optically or spatially into several line blocks and is periodically switched on and off, block by block, for synchronous illumination of an LC device 3.2.10 directional backlight unit D-BLU backlight unit that co

48、llimates emergent light into an arbitrary solid angle or directs the collimated emergent light toward a spatial zone or surface on the back side of the LC device IEC 62595-1-2:2016 IEC 2016 7 3.2.11 multi-directional backlight unit backlight unit in which the light sources (LEDs or LDs) are spatiall

49、y mounted in an array around a micro- or submicro-featured (structured) light-guide plate (LGP) or light-guide film (LGF), for sequentially switching to create spatially and/or angularly directed light for rendering a 3D image on the LC device Note 1 to entry: LED and LD are defined later. 3.2.12 scanning directional backlight unit scanning D-BLU D-BLU that illuminates continuously or distinctively a wide solid angle and/or an area in front of the backlight unit, i.e. the back