IEC 62977-2-1:2021

IEC 62977-2-1 ®
Edition 1.0 2021-01
INTERNATIONAL
STANDARD
colour
inside
Electronic displays –
Part 2-1: Measurements of optical characteristics – Fundamental measurements

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IEC 62977-2-1 ®
Edition 1.0 2021-01
INTERNATIONAL
STANDARD
colour
inside
Electronic displays –
Part 2-1: Measurements of optical characteristics – Fundamental measurements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120; 31.260 ISBN 978-2-8322-9225-9

– 2 – IEC 62977-2-1:2021 © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 10
3.1 Terms and definitions . 10
3.2 Abbreviated terms . 11
4 General . 11
4.1 Measured basic quantities . 11
4.2 Electrical driving of the display (depending on the nature of the display) . 11
4.3 Data acquisition timing and display driving . 12
4.3.1 Stationary measurements . 12
4.3.2 Properties of display under test . 12
5 Standard measuring conditions . 12
5.1 Standard measuring environmental conditions . 12
5.2 Standard measuring darkroom conditions . 12
5.3 Standard setup conditions . 12
5.3.1 General . 12
5.3.2 Adjustment of display . 12
5.3.3 Starting conditions of measurements . 13
5.3.4 Conditions of measuring equipment . 13
5.4 Location of measurement field . 15
5.5 Standard test patterns . 16
5.6 Viewing direction coordinate system . 16
6 Simple box optical measurement methods . 17
6.1 General . 17
6.2 Test patterns. 17
6.3 Luminance . 18
6.3.1 Purpose . 18
6.3.2 Measuring conditions . 18
6.3.3 Measuring method . 18
6.4 Darkroom contrast ratio . 19
6.4.1 Purpose . 19
6.4.2 Measuring conditions . 19
6.4.3 Measuring method . 19
6.5 Luminance uniformity . 20
6.5.1 Purpose . 20
6.5.2 Measuring conditions . 20
6.5.3 Measuring method . 20
6.6 Chromaticity . 21
6.6.1 Purpose . 21
6.6.2 Measuring conditions . 21
6.6.3 Measuring method . 22
6.7 White chromaticity and correlated colour temperature . 22
6.7.1 Purpose . 22
6.7.2 Measuring conditions . 22

6.7.3 Measuring method . 22
6.8 Chromaticity non-uniformity . 23
6.8.1 Purpose . 23
6.8.2 Measuring conditions . 23
6.8.3 Measuring method . 23
6.9 Chromaticity/colour gamut area. 24
6.9.1 Purpose . 24
6.9.2 Measuring conditions . 24
6.9.3 Measuring method . 25
6.9.4 Chromaticity/colour gamut area in CIE 1931 and CIE 1976 chromaticity
diagram . 27
6.10 Luminance and colour variation with viewing direction . 28
6.10.1 Purpose . 28
6.10.2 Measuring conditions . 28
6.10.3 Measuring method . 28
7 Display multi-colour optical measuring methods . 30
7.1 General . 30
7.2 Test patterns. 30
7.3 Luminance . 33
7.3.1 Purpose . 33
7.3.2 Measuring conditions . 33
7.3.3 Measuring method . 34
7.4 Darkroom contrast ratio . 35
7.4.1 Purpose . 35
7.4.2 Measuring conditions . 35
7.4.3 Measuring method . 35
7.5 Luminance uniformity . 35
7.6 Chromaticity, tristimulus values, and spectra . 35
7.6.1 Purpose . 35
7.6.2 Measuring conditions . 36
7.6.3 Measuring method . 36
7.7 White chromaticity and correlated colour temperature . 36
7.7.1 Purpose . 36
7.7.2 Measuring conditions . 36
7.7.3 Measuring method . 36
7.8 Chromaticity/colour gamut area. 37
7.8.1 Purpose . 37
7.8.2 Measuring conditions . 37
7.8.3 Measuring method . 37
7.8.4 Chromaticity/colour gamut area in CIE 1931 and CIE 1976 chromaticity
diagram . 37
7.9 Chromaticity non-uniformity . 38
7.10 Luminance and colour variation with viewing direction . 38
7.10.1 Purpose . 38
7.10.2 Measuring conditions . 38
7.10.3 Measuring method . 38
8 CIELAB colour gamut volume . 39
8.1 Purpose . 39
8.2 Measuring conditions . 40

– 4 – IEC 62977-2-1:2021 © IEC 2021
8.3 Measuring method . 40
Annex A (normative) RGB boundary colours for CIE
...