IEC 62341-6-4:2017

Organic light emitting diode (OLED) displays - Part 6-4: Measuring methods of transparent properties

IEC 62341-6-4:2017(E) specifies the standard measurement conditions and measuring methods for determining the optical performance of transparent properties of organic light emitting diode (OLED) display panels and modules. This document includes the display performance under darkroom conditions, and front and back illumination.

General Information

• Status: Published
• Publication Date: 17-May-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 5 - TC 110/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 26-May-2017
• Completion Date: 18-May-2017

Standards Content (Sample)

IEC 62341-6-4 ®
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –
Part 6-4: Measuring methods of transparent properties
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IEC 62341-6-4 ®
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –

Part 6-4: Measuring methods of transparent properties

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.260 ISBN 978-2-8322-4297-1

– 2 – IEC 62341-6-4:2017  IEC 2017
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Measuring conditions . 7
4.1 Standard measuring environmental conditions . 7
4.2 Standard lighting conditions . 7
4.2.1 Darkroom conditions . 7
4.2.2 Ambient illumination conditions . 7
4.2.3 Ambient illumination spectra . 8
4.3 Standard setup conditions . 8
4.3.1 Starting conditions of measurements . 8
4.3.2 Conditions of measuring equipment . 9
5 Measuring methods of transparent properties . 10
5.1 Measuring methods of transmission performance . 10
5.1.1 Hemispherical transmittance factor with specular included . 10
5.1.2 Transmitted haze under hemispherical illumination . 12
5.1.3 Directional transmittance factor . 14
5.1.4 Measurement method of purity . 16
5.1.5 Colour variation caused by a transparent display . 19
5.2 Measuring methods of on-screen performance in a darkroom. 20
5.2.1 Luminance and its uniformity . 20
5.2.2 Chromaticity and colour non-uniformity . 23
5.2.3 Darkroom contrast ratio . 24
5.2.4 Grey scale and gamma characteristics . 25
5.2.5 Colour gamut . 27
5.2.6 Directional optical characteristics . 29
6 Measuring methods of reflection properties . 30
6.1 Hemispherical reflectance factor with specular included . 30
6.1.1 Purpose . 30
6.1.2 Measuring conditions . 30
6.1.3 Measuring method . 30
6.2 Directional reflectance factor . 31
6.2.1 Purpose . 31
6.2.2 Measuring conditions . 31
6.2.3 Measuring method . 31
7 Optical on-screen performance under ambient illumination . 31
7.1 Ambient contrast ratio . 31
7.1.1 Purpose . 31
7.1.2 Measuring conditions . 32
7.1.3 Measuring method . 32
7.2 Display ambient colour measurement . 33
7.2.1 Purpose . 33
7.2.2 Measuring conditions . 33
7.2.3 Measuring method . 34

Annex A (normative) Alternative method for measuring the hemispherical
transmittance factor of a transparent OLED display . 36
A.1 Purpose . 36
A.2 Measuring conditions . 36
A.3 Measuring the transmittance . 36
Bibliography . 39

Figure 1 – Layout diagram of measurement setup . 9
Figure 2 – Side view of measuring concept for the hemispherical transmittance factor
measurement with specular included or excluded . 12
Figure 3 – Schematic arrangement of haze measurement . 14
Figure 4 – Side view of measuring concept for the hemispherical transmittance factor
measurement with specular included or excluded . 16
Figure 5 – Measuring configuration for purity measurement . 18
Figure 6 – Test patterns for purity measurement . 18
Figure 7 – Test pattern for 4 % window luminance . 21
Figure 8 – Example of luminance loading measurement . 22
Figure 9 – Measurement locations . 23
Figure 10 – Measuring patterns for gamma measurement . 26
Figure A.1 – Measurement geometry using a sampling sphere . 37

Table 1 – Standard ambient conditions . 8
Table 2 –Measuring conditions of the ports . 14
Table 3 – Measured example for purity . 19
Table 4 – Working example for colour variation index . 20
Table 5 – Worked example for luminance loading . 22
Table 6 – Example of luminance non-uniformity . 23
Table 7 – Example of colour uniformity measurement . 24
Table 8 – Example of gamma measurement . 26
Table 9 – Reference areas for the colour reproduction range . 28
Table 10 – Example of measurement for the colour gamut variation ratio . 28
Table 11 – Example of measurement for the directional electro-optical characteristic . 30

– 4 – IEC 62341-6-4:2017  IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ORGANIC LIGHT EMITTING DIODE (OLED) DISPLAYS –

Part 6-4: Measuring methods of transparent properties

FOREWORD
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