1、BSI Standards PublicationLCD backlight unitPart 1-1: Generic specificationBS EN 62595-1-1:2013National forewordThis British Standard is the UK implementation of EN 62595-1-1:2013. It isidentical to IEC 62595-1-1:2013.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/47,
2、 Semiconductors.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2013Published
3、by BSI Standards Limited 2013ISBN 978 0 580 72745 0ICS 31.120; 31.260Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicati
4、onAmd. No. Date Text affectedBRITISH STANDARDBS EN 62595-1-1:2013EUROPEAN STANDARD EN 62595-1-1 NORME EUROPENNE EUROPISCHE NORM July 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung M
5、anagement Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62595-1-1:2013 E ICS 31.120; 31.260 English version LCD backlight unit - Part 1-1: Generic specification (IEC 62595-1-1:201
6、3) Ecran LCD rtroclairage - Partie 1-1 : Spcification gnrique (CEI 62595-1-1:2013) LCD-Hinterleuchtungseinheiten Teil 1-1: Allgemeine Anforderungen (IEC 62595-1-1:2013) This European Standard was approved by CENELEC on 2013-05-14. CENELEC members are bound to comply with the CEN/CENELEC Internal Reg
7、ulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC
8、 member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official ve
9、rsions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
10、the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 62595-1-1:2013EN 62595-1-1:2013 - 2 - Foreword The text of document 110/387/CDV, future edition 1 of IEC 62595-1-1, prepared by IEC/TC 110 “Electronic display devi
11、ces“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62595-1-1:2013. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-02-14 latest date b
12、y which the national standards conflicting with the document have to be withdrawn (dow) 2016-05-14 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such pa
13、tent rights. Endorsement notice The text of the International Standard IEC 62595-1-1:2013 was approved by CENELEC as a European Standard without any modification. BS EN 62595-1-1:2013- 3 - EN 62595-1-1:2013 Annex ZA (normative) Normative references to international publications with their correspond
14、ing European publications The following documents, in whole or in part, are normatively referenced in this document 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 am
15、endments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60027 all parts Letter symbols to be used in electrical technology - Part 1: General EN 60027 all parts IEC 60410
16、 1973 Sampling plans and procedures for inspection by attributes - - IEC 60617 all parts Graphical symbols for diagrams - - IEC 60747-1 + corr. August 2006 2008 Semiconductor devices - Part 1: General - - IEC 60747-10 1991 Semiconductor devices - Discrete devices - Part 10: Generic specifictaion for
17、 discrete divices and integrated circuits - - IEC 61747-10-2 Liquid crystal display devices - Part 10-2: Environmental, endurance and mechanical test methods - Environmental and endurance - - IEC 62595-1-2 2011 LCD backlight unit - Part 1-2: Terminology and letter symbols EN 62595-1-2 2012 IEC 62595
18、-2 LCD backlight unit - Part 2: Electro-optical measurement methods of LED backlight unit for liquid crystal displays EN 62595-2 ISO 80000-1 2009 Quantities and units - Part 1: General EN ISO 80000-1 2013 IEC QC 001002-2 1998 IEC Quality Assessment System for Electronic Components (IECQ) - Rules of
19、Procedure - Part 2: Documentation - - IEC QC 001002-3 2005 IEC Quality Assessment System for Electronic Components (IECQ) - Rules of Procedure - Part 3: Approval procedures - - BS EN 62595-1-1:2013 2 62595-1-1 IEC:2013 CONTENTS 1 Scope . 6 2 Normative references . 6 3 Technical aspects . 7 3.1 Order
20、 of precedence 7 3.2 Terminology, units and symbols 7 3.3 Preferred values of temperature, humidity and pressure 7 3.4 Marking . 7 3.4.1 BLU identification 7 3.4.2 BLU traceability . 7 3.4.3 Packing . 7 3.5 Categories of assessed quality 8 3.6 Screening 8 3.7 Handling 8 4 Quality assessment procedur
21、es 8 4.1 General . 8 4.2 Eligibility for qualification approval 8 4.3 Primary stage of manufacture 9 4.4 Commercially confidential information . 9 4.5 Formation of inspection lots . 9 4.6 Structurally similar devices 9 4.7 Granting of qualification approval 9 4.8 Quality conformance inspection . 9 4
22、.8.1 General . 9 4.8.2 Division into groups and subgroups . 9 4.8.3 Inspection requirements 11 4.8.4 Supplementary procedure for reduced inspection 12 4.8.5 Sampling requirements for small lots . 12 4.8.6 Certified records of released lots (CRRL) 12 4.8.7 Delivery of devices subjected to destructive
23、 or non-destructive tests . 12 4.8.8 Delayed deliveries . 13 4.8.9 Supplementary procedure for deliveries . 13 4.9 Statistical sampling procedures . 13 4.9.1 General . 13 4.9.2 AQL sampling plans . 13 4.9.3 LTPD sampling plans . 13 4.10 Endurance tests 13 4.11 Endurance tests where the failure rate
24、is specified 13 4.11.1 Specification of failure rate 13 4.11.2 General . 13 4.11.3 Selection of samples . 13 4.11.4 Failure . 13 4.11.5 Endurance test time and sample size 14 4.11.6 Procedure to be used if the number of observed failures exceed the acceptance number . 14 4.12 Accelerated test proced
25、ures 14 BS EN 62595-1-1:201362595-1-1 IEC:2013 3 4.13 Capability approval 14 5 Test and measurement procedures . 15 5.1 Standard atmospheric conditions . 15 5.2 Physical examination . 15 5.2.1 Visual examination 15 5.2.2 Dimensions 15 5.2.3 Permanence of marking . 15 5.3 Electrical and optical measu
26、rements . 15 5.3.1 General conditions and precautions . 15 5.3.2 Alternative methods . 16 5.4 Environmental tests . 16 Annex A (informative) Examples of BLU drawings 17 Annex B (informative) Lot tolerance percentage defective (LTPD) sampling plans . 19 Figure A.1 A front view of BLU . 17 Figure A.2
27、A rear view of BLU 17 Figure A.3 A lateral view of BLU 18 Figure A.4 Example of LED edge backlight unit 18 Figure A.5 Example of LED direct backlight unit . 18 Table B.1 LTPD sampling plans (1 of 2) . 20 Table B.2 Hypergeometric sampling plans for small lot sizes of 200 or less . 22 BS EN 62595-1-1:
28、2013 6 62595-1-1 IEC:2013 LCD BACKLIGHT UNIT Part 1-1: Generic specification 1 Scope This part of IEC 62595 is a generic specification for backlight unit (BLU) for liquid crystal displays. It defines general procedures for quality assessment and gives general rules for the measuring methods of elect
29、rical and optical characteristics, rules for climatic and mechanical tests, and rules for endurance tests. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the editio
30、n cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60027 (all parts), Letter symbols to be used in electrical technology IEC 60410:1973, Sampling plans and procedures for inspection by attributes IEC 60617 (all parts), Graph
31、ical symbols for diagrams IEC 60747-1:2006, Semiconductor devices Part 1: General IEC 60747-10:1991, Semiconductor devices Part 10: Generic specification for discrete devices and integrated circuits IEC 61747-10-2, Liquid crystal display devices Part 10-2: Environmental, endurance and mechanical tes
32、t methods Environmental and endurance1 IEC 62595-1-2:2012, LCD backlight unit Part 1-2: Terminology and letter symbols IEC 62595-2, LCD backlight unit Part 2: Electro-optical measurement methods of LED backlight unit IECQ QC 001002-2:1998, IEC Quality Assessment System for Electronic Components (IEC
33、Q System) Rules of Procedure Part 2: Documentation IECQ QC 001002-3:2005, IEC Quality Assessment System for Electronic Components (IECQ System) Rules of Procedure Part 3: Approval procedures ISO 80000-1:2009, Quantities and units Part 1: General 1To be published BS EN 62595-1-1:201362595-1-1 IEC:201
34、3 7 3 Technical aspects 3.1 Order of precedence Where there are conflicting requirements, documents shall rank in the following order of authority: a) the detail specification; b) the blank detail specification; c) the family specification, if any; d) the sectional specification; e) the generic spec
35、ification; f) the basic specification; g) any other international (e.g. IEC) documents to which reference is made; h) a national document. The same order of precedence shall apply to equivalent national documents. 3.2 Terminology, units and symbols For the purposes of this document, the terms, defin
36、itions, units, and symbols given in IEC 62595-1-2 apply. Units, graphical and letter symbols shall, wherever possible, be taken from IEC 60027, IEC 60617 and ISO 80000-1. Any other units, symbols or terminology peculiar to some parts of the BLU covered by this generic specification shall be taken fr
37、om the relevant IEC or ISO standards or derived in accordance with the principles of the standards listed above. 3.3 Preferred values of temperature, humidity and pressure Preferred values of temperature, humidity and pressure for the measurement of characteristics for tests and for operating condit
38、ions will be given in the detail specification. 3.4 Marking 3.4.1 BLU identification The marking on the BLU shall enable clear identification of the BLU. 3.4.2 BLU traceability The BLU shall be provided with a traceability code which enables back-tracing of the BLU to a certain production or inspect
39、ion lot. 3.4.3 Packing Marking on the packing shall state: a) the BLU identification code; b) the traceability code(s) of the enclosed BLU; c) the number of enclosed BLUs; d) the required precautions, if any. This marking shall be in accordance with custom regulations. BS EN 62595-1-1:2013 8 62595-1
40、-1 IEC:2013 NOTE Additional requirements can be specified in the relevant detail specification. 3.5 Categories of assessed quality This generic specification provides three categories of assessed quality. The BLUs are grouped in an identified and date-coded inspection lot, which is tested to the spe
41、cified quality categories. The AQLs or LTPDs associated with the same inspection group may vary for each category and shall be as specified in the detail specification or in the assessed quality which is negotiated with a customer. The minimum requirements of the categories are as follows: Category
42、I The type meets the requirements of qualification approval of categories II or III. Each lot meets the inspection requirements of group A which includes functional tests. Every three months, one lot meets the inspection requirements for interconnection ability. Annually, one lot meets the group B a
43、nd group C inspection requirements (see 4.8.1). Category II The lot meets the inspection requirements of group A and group B on a lot-by-lot basis, and of group C on a periodic basis. Category III The lot is 100 % screened and meets the inspection requirements of group A and group B on a lot-by-lot
44、basis, and of group C on a periodic basis. 3.6 Screening A screening is an examination or test applied to all BLUs in a lot. When required by the detail specification, all BLUs in the lot shall be screened by submitting them to one of the sequences given in the relevant table of the sectional or bla
45、nk detail specification, and all defectives removed. Other sequences not specified in this standard are applicable only where the above sequences are not correlated or are in contradiction with recognized failure mechanisms. When a part of the screening process as given in the relevant table of the
46、sectional or blank detail specification forms a part of the manufacturing process in the prescribed sequence, these procedures need not to be repeated. For the purpose of this specification, burn-in is defined as electrical stress applied to all BLUs in a lot for a specified period of time for the p
47、urpose of detecting and removing potential early failures. 3.7 Handling See IEC 60747-1:2006, Clause 8. Adequate warning shall be displayed in the case of harmful products. 4 Quality assessment procedures 4.1 General Quality assessment comprises the procedure for obtaining qualification approval as
48、defined in 4.7, followed by quality conformance inspection on a lot-by-lot basis (including screening if required) and on a periodic basis as qualified in the detail specification. The quality assessment tests are subdivided into group A, B and C tests; these are performed lot by lot or periodically
49、, as defined in 4.8.1. In some cases, group D tests may also be specified, for example, for qualification approval. 4.2 Eligibility for qualification approval A type of BLU becomes eligible for qualification approval when the rules of procedure of IECQ QC 001002-3:2005, are satisfied. BS EN 62595-1-1:201362595-1-1 IEC:2013 9 4.3 Primary stage of manufacture The primary stage of manufacture is defined in the sectional or blank detail specification. 4.4 Commercially confiden
