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
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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
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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
