IEC 62341-6-7:2024

Organic light emitting diode (OLED) displays - Part 6-7: Measuring methods of optical characteristics for display with under-screen feature

IEC 62341-6-7:2024 specifies the standard measuring conditions and measuring methods for determining the optical characteristics of an OLED display with under-screen camera; other under-screen features, such as under-screen fingerprint or under-screen time of flight (TOF) can also be applied. This document applies to OLED displays such as mobile phone, monitor and TV with under-screen features.
NOTE Under-screen feature will want the display to be partially transparent and partially non-transparent, and this can be achieved only by certain types of display technology, for example OLED. This document mainly focuses on OLED display with under-screen feature.

General Information

• Status: Published
• Publication Date: 02-Oct-2024
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 18 - TC 110/WG 18
• Current Stage: PPUB - Publication issued
• Start Date: 25-Oct-2024
• Completion Date: 03-Oct-2024

Standards Content (Sample)

IEC 62341-6-7 ®
Edition 1.0 2024-10
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –
Part 6-7: Measuring methods of optical characteristics for display with under-
screen feature
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IEC 62341-6-7 ®
Edition 1.0 2024-10
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –

Part 6-7: Measuring methods of optical characteristics for display with under-

screen feature
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.260  ISBN 978-2-8322-9754-4

– 2 – IEC 62341-6-7:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 8
4 Measuring conditions . 8
4.1 Standard measuring environmental conditions . 8
4.2 Standard darkroom conditions . 9
4.3 Standard measurement locations . 9
5 Measuring methods of display performance . 10
5.1 Reflectance difference . 10
5.1.1 General . 10
5.1.2 Measuring equipment . 10
5.1.3 Measuring procedure . 10
5.2 Uniformity . 11
5.2.1 General . 11
5.2.2 Measuring apparatus . 11
5.2.3 Measuring procedure . 11
5.3 Gamma . 12
5.3.1 General . 12
5.3.2 Measuring apparatus . 12
5.3.3 Measuring procedure . 12
5.4 Angular chromaticity shift . 13
5.4.1 General . 13
5.4.2 Measuring apparatus . 13
5.4.3 Measuring procedure . 13
5.5 Luminance degradation . 14
5.5.1 General . 14
5.5.2 Measuring apparatus . 15
5.5.3 Measuring procedure . 15
6 Measuring methods of transmittance performance . 16
6.1 Transmittance . 16
6.1.1 General . 16
6.1.2 Measuring apparatus . 16
6.1.3 Measuring procedure . 17
6.2 Clarity . 18
6.2.1 General . 18
6.2.2 Measuring method of modulation transfer function (MTF) . 18
6.2.3 Measuring method of spatial frequency response (SFR) . 20

Figure 1 – Example of measurement locations . 9
Figure 2 – Measurement geometries for reflectance . 11
Figure 3 – Example tone curve of the display . 13
Figure 4 – Viewing angle set up . 14

Figure 5 – Example of luminance decreases versus operating time . 15
Figure 6 – Example of the decrease of a luminance difference curve . 16
Figure 7 – Measurement geometry . 17
Figure 8 – Diffraction phenomenon of under-screen camera . 18
Figure 9 – Reference test pattern . 19
Figure 10 – Measurement configuration . 20

Table 1 – Measurement results . 14
Table 2 – Example of measured data . 16

– 4 – IEC 62341-6-7:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ORGANIC LIGHT EMITTING DIODE (OLED) DISPLAYS –

Part 6-7: Measuring methods of optical characteristics for
display with under-screen feature

FOREWORD
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IEC 62341-6-7 has been prepared by IEC technical committee 110: Electronic displays. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
110/1667/FDIS 110/1691/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 62341 series, published under the general title Organic light emitting
diode (OLED) displays, can be found on the IEC website.
The committee has decided that the contents of
...