IEC 62341-6-2:2012

Organic light emitting diode (OLED) displays - Part 6-2: Measuring methods of visual quality and ambient performance

IEC 62341-6-2:2012 specifies the standard measurement conditions and measurement methods for determining the visual quality and ambient performance of organic light-emitting diode (OLED) display modules and panels. This document mainly applies to colour display modules.

Afficheurs à diodes électroluminescentes organiques (OLED) - Partie 6-2: Méthodes de mesure de la qualité visuelle et des caractéristiques de fonctionnement sous conditions ambiantes

La CEI 62341-6-2:2012 spécifie les conditions et les méthodes de mesure normalisées, en vue de déterminer la qualité visuelle et les caractéristiques de fonctionnement dans les conditions ambiantes des modules et des panneaux d'affichage à diodes électroluminescentes organiques (OLED). Le présent document s'applique principalement aux modules d'affichage couleur.

General Information

• Status: Published
• Publication Date: 23-Jan-2012
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 5 - TC 110/WG 5
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 04-Dec-2015

Relations

• Revised: IEC 62341-6-2:2015 - Organic light emitting diode (OLED) displays - Part 6-2: Measuring methods of visual quality and ambient performance
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62341-6-2 ®
Edition 1.0 2012-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Organic light emitting diode (OLED) displays –
Part 6-2: Measuring methods of visual quality and ambient performance

Afficheurs à diodes électroluminescentes organiques (OLED) –
Partie 6-2: Méthodes de mesure de la qualité visuelle et des caractéristiques de
fonctionnement sous conditions ambiantes

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IEC 62341-6-2 ®
Edition 1.0 2012-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Organic light emitting diode (OLED) displays –

Part 6-2: Measuring methods of visual quality and ambient performance

Afficheurs à diodes électroluminescentes organiques (OLED) –

Partie 6-2: Méthodes de mesure de la qualité visuelle et des caractéristiques de

fonctionnement sous conditions ambiantes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 31.260 ISBN 978-2-88912-893-8

– 2 – 62341-6-2 © IEC:2012
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 9
4 Structure of measuring equipment . 9
5 Standard measuring conditions . 9
5.1 Standard measuring environmental conditions . 9
5.2 Standard lighting conditions . 10
5.2.1 Dark-room conditions . 10
5.2.2 Ambient illumination conditions . 10
5.3 Standard setup conditions . 15
5.3.1 General . 15
5.3.2 Adjustment of OLED display modules . 15
5.3.3 Starting conditions of measurements . 16
5.3.4 Conditions of measuring equipment . 16
6 Visual inspection of static images . 17
6.1 General . 17
6.2 Classification of visible defects . 17
6.2.1 Classification scheme . 17
6.2.2 Reference examples for subpixel defects . 17
6.2.3 Reference example for line defects . 19
6.2.4 Reference example for mura defects . 19
6.3 Visual inspection method and criteria . 20
6.3.1 Standard inspection conditions . 20
6.3.2 Standard inspection method . 21
6.3.3 Inspection criteria . 23
7 Electro-optical measuring methods under ambient illumination . 24
7.1 Reflection measurements . 24
7.1.1 Purpose . 24
7.1.2 Measuring conditions . 24
7.1.3 Measuring the hemispherical diffuse reflectance factor . 25
7.1.4 Measuring the reflectance factor for a directed light source . 27
7.2 Ambient contrast ratio . 29
7.2.1 Purpose . 29
7.2.2 Measuring conditions . 29
7.2.3 Measuring method . 30
7.3 Ambient display colour . 30
7.3.1 Purpose . 30
7.3.2 Measuring conditions . 30
7.3.3 Measuring method . 30
7.4 Ambient colour gamut volume . 31
7.4.1 Purpose . 31
7.4.2 Measuring conditions . 32
7.4.3 Measuring method . 32

62341-6-2 © IEC:2012 – 3 –
7.4.4 Reporting . 33
Annex A (informative)  Measuring relative photoluminescence contribution from
displays . 35
Annex B (informative) Calculation method of ambient colour gamut volume . 38
Bibliography . 44

Figure 1 – Example of visual inspection room setup for control of ambient room
lighting and reflections . 10
Figure 2 – Example of measurement geometries for diffuse illumination condition
using an integrating sphere and sampling sphere . 13
Figure 3 – Directional source measurement geometry using an isolated source . 15
Figure 4 – Directional source measurement geometry using a ring light source . 15
Figure 5 – Layout diagram of measurement set up . 16
Figure 6 – Classification of visible defects . 17
Figure 7 – Bright subpixel defects . 18
Figure 8 – Criteria for classifying bright and dark subpixel defects . 19
Figure 9 – Bright and dark line defects . 19
Figure 10 – Sample image of line mura defect associated with TFT non-uniformity . 20
Figure 11 – Example of spot mura defect in a grey background . 20
Figure 12 – Setup condition for visual inspection of electro-optical visual defects . 22
Figure 13 – Shape of scratch and dent defect . 24
Figure 14 – An example of range in colours produced by a given display as
represented by the CIELAB colour space . 33
Figure A.1 – Scaled bi-spectral photoluminescence response from a display . 36
Figure A.2 – Decomposed bi-spectral photoluminescence response from a display . 36
Figure B.1 – Analysis flow chart for calculating the colour gamut volume . 38
Figure B.2 – Graphical representation of the colour gamut volume for sRGB in the
CIELAB colour space . 39

Table 1 – Definitions for type of scratch and dent defects . 24
Table 2 – Eigenvalues M and M for CIE Daylight Illuminants D50 and D75 . 26
1 2
Table 3 – Example of minimum colours required for gamut volume calculation of a 3-
primary 8-bit display . 32
Table 4 – Measured tristimulus values for the minimum set of colours (see Table 3)
required for gamut volume calculation under the specified ambient illumination
condition .
...