IEC 62977-2-1:2021

Electronic displays - Part 2-1: Measurements of optical characteristics - Fundamental measurements

IEC 62977-2-1:2021(E) specifies standard measurement conditions and measuring methods for determining the optical characteristics of electronic display modules and systems. These methods apply to emissive and transmissive direct view displays that render real 2D images on a flat panel. This document evaluates the optical characteristics of these displays under darkroom conditions. This document applies to the testing of display performance in response to standard analogue or digital input signals that are not absolute luminance encoded. The input signal is relative RGB without metadata information that codes for real luminance, colour space or colour coordinates. These methods are limited to input signals with typical OETFs such as defined in IEC 61966-2-1, ITU BT. Rec. 601, ITU BT. Rec.709, and ITU BT. Rec.2020. The tests in this document are not approved for use with HDR input signals.
NOTE A flat panel or flat panel display is a display with a flat surface and minimal depth that emits visible light from the surface. The display is subdivided into an array of electronically driven pixels which can be light valves modulating a backlight, or self-luminous. Emissive/transmissive/reflective hybrid displays can be flat panel or flat panel displays.

General Information

• Status: Published
• Publication Date: 04-Jan-2021
• 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: 25-Jan-2021
• Completion Date: 05-Jan-2021

Standards Content (Sample)

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
...