IEC 61747-5-2:2011

IEC 61747-5-2 ®
Edition 1.0 2011-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Liquid crystal display devices –
Part 5-2: Environmental, endurance and mechanical test methods – Visual
inspection of active matrix colour liquid crystal display modules

Dispositifs d'affichage à cristaux liquides –
Partie 5-2: Méthodes d'essais d'environnement, d'endurance et mécaniques –
Inspection visuelle des modules d'affichage à cristaux liquides couleurs à
matrice active
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IEC 61747-5-2 ®
Edition 1.0 2011-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Liquid crystal display devices –
Part 5-2: Environmental, endurance and mechanical test methods – Visual
inspection of active matrix colour liquid crystal display modules

Dispositifs d'affichage à cristaux liquides –
Partie 5-2: Méthodes d'essais d'environnement, d'endurance et mécaniques –
Inspection visuelle des modules d'affichage à cristaux liquides couleurs à
matrice active
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX N
ICS 31.120 ISBN 978-2-88912-533-3

– 2 – 61747-5-2  IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Visual inspection method and criteria . 12
4.1 Standard inspection conditions . 12
4.1.1 Ambient conditions . 12
4.1.2 Visual inspection conditions . 12
4.1.3 Electrical driving conditions . 12
4.2 Standard inspection method . 12
4.2.1 Setup of inspection equipment and liquid crystal display modules . 12
4.2.2 Inspector and limit sample for visual inspection . 13
4.2.3 Inspection and record of result . 13
4.3 Criteria . 13
4.3.1 Bright subpixel defects . 13
4.3.2 Dark subpixel defects . 13
4.3.3 Intermediate subpixel defects . 13
4.3.4 Cluster subpixel defects . 13
4.3.5 Bright line defect . 13
4.3.6 Dark line defect . 13
4.3.7 Scratch and dent defect . 14
4.3.8 Foreign material and bubble defect . 14
4.3.9 Light leakage defect . 14
Bibliography . 15

Figure 1 – Classification of defect by visual inspection. 7
Figure 2 – Example of bright subpixel and adjacent subpixel defects in case of RGB
primary colour display . 8
Figure 3 – Example of dark subpixel and adjacent subpixel defects in case of RGB
primary colour display . 9
Figure 4 – Examples of minimum distance between subpixel defects . 10
Figure 5 – Example of light leakage between top case and outer black matrix . 11
Figure 6 – Shape of scratch and dent defect . 14
Figure 7 – Shape of foreign material and bubble defect . 14

Table 1 – Criteria of scratch and dent defects . 14
Table 2 – Criteria for foreign material and bubble defect . 14

61747-5-2  IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
LIQUID CRYSTAL DISPLAY DEVICES –

Part 5-2: Environmental, endurance
and mechanical test methods –
Visual inspection of active matrix
colour liquid crystal display modules

FOREWORD
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International Standard IEC 61747-5-2 has been prepared by IEC technical committee 110:
Flat panel display devices.
The text of this standard is based on the following documents:
FDIS Report on voting
110/287/FDIS 110/306/RVD
Full information on the voting for the approval on 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.

– 4 – 61747-5-2  IEC:2011
A list of all parts of the IEC 61747 series, under the general title Liquid crystal display devices,
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 the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indic
...