IEC 62977-3-5:2023

IEC 62977-3-5 ®
Edition 1.0 2023-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electronic displays –
Part 3-5: Evaluation of optical performance – Colour capabilities

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IEC 62977-3-5 ®
Edition 1.0 2023-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electronic displays –
Part 3-5: Evaluation of optical performance – Colour capabilities

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.120, 31.260 ISBN 978-2-8322-7551-1

– 2 – IEC 62977-3-5:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 10
4 Standard measuring equipment . 10
4.1 Video signal generator . 10
4.2 Conditions of measuring equipment . 10
4.3 Test equipment block diagram . 10
5 Standard measuring conditions . 12
5.1 Standard measuring environmental conditions . 12
5.2 Standard measuring darkroom conditions . 12
5.3 Standard setup conditions . 13
5.4 Standard test pattern . 13
6 Evaluation of colour and chromaticity capabilities . 14
6.1 Chromaticity gamut and primary colour . 14
6.1.1 Measured data for chromaticity gamut area . 14
6.1.2 Absolute chromaticity gamut area . 15
6.1.3 Chromaticity gamut intersection area . 16
6.1.4 Chromaticity and colour difference for primary colour additivity by
location on the screen . 18
6.1.5 Measuring method of chromaticity and colour difference for primary
colour additivity by location on the screen. 21
6.2 Chromaticity gamut area by input level. 22
6.2.1 Measured data . 22
6.2.2 Measuring method . 23
6.2.3 Evaluation of chromaticity gamut area by input level . 24
6.3 Chromaticity gamut area by viewing direction . 25
6.3.1 Measuring method . 25
6.3.2 Evaluation of chromaticity gamut area by viewing direction . 25
6.4 RGB primaries additivity of mixed colour . 26
6.4.1 Overview and measured data . 26
6.4.2 Measuring method . 28
6.4.3 Evaluation of additive colour mixture by input variation from colour to
white. 29
6.5 Colour reference-based colour reproduction accuracy . 31
6.5.1 Colour reference pattern . 31
6.5.2 Measuring method . 36
6.5.3 Evaluation of colour reproduction accuracy . 37
6.5.4 Evaluation of chromaticity shift by viewing direction . 38
6.6 Colour gamut volume by viewing direction . 40
6.6.1 Purpose . 40
6.6.2 Measuring method . 40
6.6.3 Evaluation of colour gamut volume by viewing direction . 41
6.7 Colour gamut intersection volume and gamut rings . 42

6.7.1 Purpose of colour gamut intersection volume . 42
6.7.2 Evaluation of colour gamut intersection volume . 42
6.7.3 Evaluation using Gamut Rings . 42
7 Reporting. 42
7.1 Reporting information requirements . 42
7.2 Measurement results requirements . 43
Annex A (informative) Alternative colour gamut volume evaluation . 45
A.1 General . 45
A.2 Measuring method for colour gamut volume at various viewing directions . 45
A.3 Interpolation of colour coordinates . 46
A.4 Alternative method for colour gamut intersection volume . 49
A.5 Spreadsheets for colour gamut related evaluation . 51
Annex B (normative) Tool for colour gamut calculation and visualization . 54
B.1 General . 54 ®
B.2 Installation and launching (Windows ) . 54
B.3 Reading input files . 54
B.4 Graph selection. 55
B.5 Graph layout . 55
B.6 CIE 1976 L*a*b* and CIE 1931 xyY plots . 56
B.7 CIE 1931 xy chromaticity diagram . 57
B.8 Gamut rings . 58
B.9 Exporting graphs . 60
B.10 Support . 61
Bibliography . 62

Figure 1 – Measuring layout for a telescopic LMD . 11
Figure 2 – Measuring layout for a close-up type LMD . 11
Figure 3 – Setup for viewing directional measurements. 12
Figure 4 – Standard multi-colour pattern for centre box measurement . 14
Figure 5 – Example of chromaticity gamut area measurements . 16
Figure 6 – Example of gamut area intersection in Recommendation ITU-R BT.709 . 18
Figure 7 – Example of absolute chromaticity gamut area dependence on input level
normalized to the value at maximum input level (255) .
...