IEC 62977-3-4:2023

IEC 62977-3-4 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
colour
inside
Electronic displays –
Part 3-4: Evaluation of optical performances – High dynamic range displays

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IEC 62977-3-4 ®
Edition 1.0 2023-03
INTERNATIONAL
STANDARD
colour
inside
Electronic displays –
Part 3-4: Evaluation of optical performances – High dynamic range displays

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120; 31.260 ISBN 978-2-8322-6701-1

– 2 – IEC 62977-3-4:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 11
4 Standard measuring equipment . 12
4.1 Video signal generator . 12
4.2 Conditions of measuring equipment . 12
4.3 Measuring equipment block diagram . 12
5 Standard measuring conditions . 13
5.1 Standard measuring environmental conditions . 13
5.2 Power supply . 13
5.3 Warm-up time . 13
5.4 Standard darkroom conditions . 13
5.5 Adjustment of HDR display . 13
6 Measuring methods of optical characteristics . 14
6.1 HDR peak luminance . 14
6.1.1 HDR peak luminance variation by black and white pattern . 14
6.1.2 APL by the window and background level . 15
6.1.3 Test pattern for HDR peak luminance . 16
6.1.4 Measuring method . 16
6.2 Black luminance and contrast ratio . 17
6.2.1 Test patterns for black luminance . 17
6.2.2 Contrast ratio . 18
6.2.3 Local contrast ratio . 19
6.2.4 Measuring method . 19
6.2.5 Contrast ratio with ambient illumination . 20
6.3 Luminance loading . 20
6.3.1 General . 20
6.3.2 Measuring method . 21
6.4 Transition times and duration of peak luminance . 21
6.4.1 Test pattern for transition time . 21
6.4.2 Measurement of rise and fall times . 21
6.4.3 Measuring method of duration time and interval . 22
6.5 Tone reproduction . 23
6.5.1 General . 23
6.5.2 Information on the evaluation of tone reproduction . 23
6.6 HDR tone mapping . 24
6.6.1 General . 24
6.6.2 Information on the evaluation of tone mapping . 24
6.7 Chromaticity gamut area and colour reproduction . 25
6.7.1 Chromaticity gamut area evaluation . 25
6.7.2 Information on the evaluation of colour reproduction . 26
7 Reporting. 27

7.1 Reporting requirements . 27
7.2 Reporting of measurement results. 27
Annex A (informative) Example of tone reproduction measurement and evaluation . 29
A.1 General . 29
A.2 Test pattern for tone reproduction with constant APL . 29
A.3 Example inputs for tone reproduction measurement . 30
A.4 Measuring method of tone reproduction . 31
A.5 Grey scale tracking accuracy . 32
Annex B (informative) Example of tone mapping evaluation . 33
B.1 Inputs of tone mapping test patterns . 33
B.2 Evaluation method of tone mapping input value outside of the display
luminance range . 33
B.3 Supplemental measurement . 35
Annex C (informative) Example of colour reproduction measurement and evaluation . 36
C.1 General . 36
C.2 Test pattern for colour reproduction with constant APL . 36
C.3 Example inputs for colour reference pattern . 37
C.4 Measuring method of colour reproduction . 41
C.5 Colour reproduction accuracy . 42
Bibliography . 43

Figure 1 – Measuring layout for non-contact measurement . 12
Figure 2 – Measuring layout for close-up type LMD . 14
Figure 3 – Example of white luminance curve as function of the white window area,
expressed by its APL (%) . 15
Figure 4 – General window pattern with A % area . 16
Figure 5 – A % APL pattern with A % area white . 16
Figure 6 – Input patterns for black luminance . 18
Figure 7 – Graphical example of rise time and fall time of peak luminance . 22
Figure 8 – OETF and EOTF curves . 23
Figure 9 – Example of tone mapping for PQ curve . 24
Figure 10 – BT.2020 and DCI-P3 chromaticity gamut in xy chromaticity diagram . 25
Figure A.1 – Multi-colour pattern for grey scale measurement . 30
Figure B.1 – Black-to-colour image for PQ HDR with saturation . 34
Figure B.2 – Black-to-colour image for PQ HDR with no saturation . 34
Figure B.3 – Colour-to-white image for PQ HDR with saturation . 35
Figure B.4 – Colour-to-white image for PQ HDR with no saturation . 35
Figure C.1 – Multi-colour pattern with centre reference colour for colour reproduction
measurement . 36

Table 1 – Primary colours of BT.2020 and DCI-P3 . 25
Table A.1 – Examples of measuring range for PQ grey scale measurement . 31
Table B.1 – Code values for tone mapping test patterns . 33
Table C.1 – Conversion matrix between XYZ and RGB for BT.2020 colorimetry . 37
Table C.2 – Conversion matrix between XYZ and RGB for DCI-P3@D65 colorimetry . 37

– 4 – IEC 62977-3-4:2023 © IEC 2023
Table C.3 – Example of the colour reference pattern target values . 38
Table C.4 – Example RGB inputs of colour reference pattern for BT.2020 colorimetry . 39
Table C.5 – Example RGB inputs of colour reference pattern for DCI-P3@D65
colorimetry . 40

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRONIC DISPLAYS –
Part 3-4: Evaluation of optical performances –
High dynamic range displays
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides
...