IEC TR 62977-2-3:2017

Electronic display devices - Part 2-3: Measurements of optical properties - Multi-colour test patterns

IEC TR 62977-2-3:2017 (E), which is a Technical Report, reviews the impact of test pattern colour content and image loading on the measured display's photometric and colorimetric performance. Experimental data for several display technologies is presented to demonstrate the need for using a broader range of colours in the test patterns, and measuring the display at an image loading level appropriate for the intended application.

General Information

• Status: Published
• Publication Date: 08-Mar-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.120 - Electronic display devices
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 13 - TC 110/WG 13
• Current Stage: PPUB - Publication issued
• Start Date: 13-Mar-2017
• Completion Date: 09-Mar-2017

Standards Content (Sample)

IEC TR 62977-2-3 ®
Edition 1.0 2017-03
TECHNICAL
REPORT
colour
inside
Electronic display devices –
Part 2-3: Measurements of optical properties – Multi-colour test patterns

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IEC TR 62977-2-3 ®
Edition 1.0 2017-03
TECHNICAL
REPORT
colour
inside
Electronic display devices –
Part 2-3: Measurements of optical properties – Multi-colour test patterns

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120; 31.260 ISBN 978-2-8322-4018-2

– 2 – IEC TR 62977-2-3:2017  IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 Colour-managed displays . 7
4.1 Legacy displays . 7
4.2 Modern displays . 7
5 Results . 8
6 Conclusion . 15
Bibliography . 16

Figure 1 – Legacy model . 7
Figure 2 – Example of modern drive models . 8
Figure 3 – Example of RGB checkerboard patterns . 9
Figure 4 – Example of test pattern with low colour content, where measurement
locations are identified by the circles . 10
Figure 5 – Example of RGB and white test pattern . 10
Figure 6 – Low APL loading series of red, green, blue, and white test patterns . 12
Figure 7 – Example signal loading behaviour for an WRGB (top) and RGB (bottom)
OLED display . 13
Figure 8 – Example of a low APL loading test pattern with small box size. 14
Figure 9 – Example of APL loading profiles of a WRGB OLED display (top) compared
to an RGB OLED display . 15

Table 1 – Example luminance data for an RGB and WRGB OLED display . 12
Table 2 – Scaling the size of the colour boxes in the APL loading pattern relative to
the screen dimensions . 14

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRONIC DISPLAY DEVICES –
Part 2-3: Measurements of optical properties –
Multi-colour test patterns
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC TR 62977-2-3, which is a technical report, has been prepared by IEC technical committee
110: Electronic display devices.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
110/781A/DTR 110/800A/RVDTR
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.

– 4 – IEC TR 62977-2-3:2017  IEC 2017
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62977 series, published under the general title Electronic display
devices, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
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INTRODUCTION
Current display measurement standards mainly use simple test patterns to estimate the
display performance. These test patterns would typically contain only one colour, or a colour
with a black background. However, as recent research has shown, modern display electronics
can be content-aware, and adjust the display rendering based on the input image content.
Therefore, multi-colour test patterns that more closely simulate realistic image content are
recommended in order to better represent the display performance.
This Technical Report discusses the impact of the display drive electronics and image
processing on the display rendering behaviour, and reviews research results that demonstrate
the need for multi-colour test patterns and average picture level loading considerations.

– 6 – IEC TR 62977-2-3:2017  IEC 2017
ELECTRONIC DISPLAY DEVICES –
Part 2-3: Measurements of optical properties –
Multi-colour test patterns
1 Scope
This part of IEC 62977, which is a Technical Report, reviews the impact of test pattern colour
content and image loading on the measured display's photometric and colorimetric
performance. Experimental data for several display technologies is presented to demonstrate
the need for using a broader range of colours in the test patterns, and measuring the display
at an image loading level appropriate for the intended application.
2 Normative references
There are no normative references in this document.
3 Terms, definitions and abbreviated terms
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Terms and definitions
3.1.1
signal pixel
smallest encoded picture element in the input image
3.1.2
pre-gamma average picture level
average input level of all signal pixels relative to an equivalent white pixel driven by a digital
RGB input
Note 1 to entry: Unless otherwise stated, the pre-gamma average picture level (APL) will simply be referred to as
average picture level in this document.
Note 2 to entry: the APL will normally be expressed as a percentage, where a full white screen at maximum drive
level would be 100 % APL.
3.2 Abbreviated terms
APL average picture level
CIE Commission Internationale de L’Eclairage (International Commission on Illumination)
LUT look-up tabl
...