EN 62595-2:2013
(Main)LCD backlight unit - Part 2: Electro-optical measurement methods of LED backlight unit
LCD backlight unit - Part 2: Electro-optical measurement methods of LED backlight unit
IEC 62595-2:2012 specifies the standard measurement conditions and measuring methods for determining electrical, optical, and electro-optical parameters of LED backlight units for liquid crystal displays. NOTE: Other backlights (Cold Cathode Fluorescent Lamps (CCFLs), External Electrode Fluorescent Lamps (EEFLs), Hot Cathode Fluorescent Lamps (HCFLs), Carbon Nano Tube (CNT), etc.) are excluded from this standard.
LCD-Hinterleuchtungseinheiten - Teil 2: Elektro-optische Messverfahren für LED-Hinterleuchtungseinheiten
Ecran LCD à rétro-éclairage - Partie 2: Méthodes de mesures électro-optiques d'un écran à retro-éclairage à DEL
La CEI 62595-2:2012 spécifie les conditions de mesure et des méthodes de mesure normalisées en vue de déterminer des paramètres électriques, optiques et électro-optiques d'écrans à rétro-éclairage à DEL pour afficheurs à cristaux liquides. NOTE: D'autres rétro-éclairages (les lampes fluorescentes à cathode froide (CCFL), les lampes fluorescentes à électrode externe (EEFL), les lampes fluorescentes à cathode chaude (HCFL), les nanotubes de carbone (CNT), etc.) sont exclus de la présente norme.
Zaslon LCD z osvetlitvijo ozadja - 2. del: Elektrooptične merilne metode pri zaslonih LCD
Ta del serije IEC 62595 določa standardne pogoje merjenja in načine merjenja za določanje električnih, optičnih in elektro-optičnih parametrov enot za osvetlitev z diodami LED za zaslone s tekočimi kristali.
OPOMBA: Druge osvetlitve (hladnokatodne fluorescentne luči (CCFL), zunanje elektrodne fluorescentne luči (EEFL), toplokatodne fluorescentne luči (HCFL), ogljikova nano cev (CNT), itd.) niso vključene v ta standard.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2013
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LCD backlight unit - Part 2: Electro-optical measurement methods of LED backlight unit
LCD-Hinterleuchtungseinheiten - Teil 2: Elektro-optische Messverfahren für LED-
Hinterleuchtungseinheiten
Ecran LCD à rétro-éclairage - Partie 2: Méthodes de mesures électro-optiques d'un
écran à retro-éclairage à DEL
Ta slovenski standard je istoveten z: EN 62595-2:2013
ICS:
31.120 Elektronske prikazovalne Electronic display devices
naprave
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 62595-2
NORME EUROPÉENNE
February 2013
EUROPÄISCHE NORM
ICS 31.120; 31.260
English version
LCD backlight unit -
Part 2: Electro-optical measurement methods of LED backlight unit
(IEC 62595-2:2012)
Ecran LCD à rétro-éclairage - LCD-Hinterleuchtungseinheiten -
Partie 2: Méthodes de mesures Teil 2: Elektro-optische Messverfahren
électro-optiques d'un écran für LED-Hinterleuchtungseinheiten
à retro-éclairage à DEL (IEC 62595-2:2012)
(CEI 62595-2:2012)
This European Standard was approved by CENELEC on 2012-11-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations 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 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 versions.
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, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management 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 62595-2:2013 E
Foreword
The text of document 110/384/FDIS, future edition 1 of IEC 62595-2, prepared by IEC/TC 110
"Electronic display devices" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 62595-2:2013.
The following dates are fixed:
(dop) 2013-08-08
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-11-01
• latest date by which the national
standards conflicting with the
document have to be withdrawn
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
patent rights.
Endorsement notice
The text of the International Standard IEC 62595-2:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61747-1 NOTE Harmonised as EN 61747-1.
ISO 11664-1:2007 NOTE Harmonised as EN ISO 11664-1:2011 (not modified).
ISO 11664-5:2009 NOTE Harmonised as EN ISO 11664-5:2011 (not modified).
- 3 - EN 62595-2:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding 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 amendments) 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 60050 Series International Electrotechnical Vocabulary - -
(IEV)
IEC 61747-6 - Liquid crystal and solid-state display EN 61747-6 -
devices -
Part 6: Measuring methods
for liquid crystal modules - Transmissive type
IEC 62595-1-2 - LCD backlight unit - EN 62595-1-2 -
Part 1-2: Terminology and letter symbols
CIE publication 15 2004 Colorimetry - -
IEC 62595-2 ®
Edition 1.0 2012-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
LCD backlight unit –
Part 2: Electro-optical measurement methods of LED backlight unit
Écran LCD à rétro-éclairage –
Partie 2: Méthodes de mesures électro-optiques d'un écran à rétro-éclairage à
DEL
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX P
ICS 31.120; 31.260 ISBN 978-2-83220-344-6
– 2 – 62595-2 © IEC:2012
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General measurement conditions . 5
4.1 Standard atmospheric conditions for LED BLU . 5
4.2 Measuring setup . 5
4.3 Warm-up time . 6
5 Measurement methods . 7
5.1 Electrical measurement methods . 7
5.1.1 Conditions . 7
5.1.2 Current . 7
5.1.3 Voltage . 7
5.1.4 Power consumption . 7
5.2 Optical measurement methods . 8
5.2.1 Conditions . 8
5.2.2 Luminance . 8
5.2.3 Luminance uniformity. 8
5.2.4 Spectral power distribution . 10
5.2.5 Chromaticity . 10
5.2.6 Colour uniformity . 10
5.2.7 Correlated colour temperature . 11
5.2.8 Angular luminance uniformity . 11
5.2.9 Angular colour uniformity . 11
5.2.10 Measurement methods of block-wise BLU. 12
Annex A (informative) Practical measurement methods of block-wise BLU . 14
Bibliography . 16
Figure 1 – Example of measuring setup for LED BLU . 6
Figure 2 – Example of warm-up characteristic of BLU . 7
Figure 3 – Definition of zenith angle θ and azimuth angle ϕ. . 8
Figure 4 – Examples of measurement point layout . 10
Figure 5 – Angular luminance uniformity measurement . 11
Figure 6 – Example of test pattern (8 × 10 segments) for block-wise BLU . 12
Figure 7 – Example of incoherent point spread function . 12
Figure 8 – Example of test pattern of incoherent point spread function . 13
Figure 9 – Example of test pattern of crosstalk . 13
Figure A.1 – Measurement of average slope of incoherent point spread function . 14
Figure A.2 – Black box pattern for crosstalk measurement using LCD . 15
Figure A.3 – Example of crosstalk measurement results using LCD . 15
62595-2 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LCD BACKLIGHT UNIT –
Part 2: Electro-optical measurement methods of LED backlight unit
FOREWORD
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all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application 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 62595-2 has been prepared by IEC Technical Committee 110:
Electronic display devices.
The text of this standard is based on the following documents:
FDIS Report on voting
110/384/FDIS 110/406/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.
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