IEC TR 62977-1-31:2021/AMD1:2022

IEC TR 62977-1-31 ®
Edition 1.0 2022-03
TECHNICAL
REPORT
colour
inside
AMENDMENT 1
Electronic displays –
Part 1-31: Generic – Practical information on the use of light measuring devices

IEC TR 62977-1-31:2021-04/AMD1:2022-03(en)

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IEC TR 62977-1-31 ®
Edition 1.0 2022-03
TECHNICAL
REPORT
colour
inside
AMENDMENT 1
Electronic displays –
Part 1-31: Generic – Practical information on the use of light measuring devices

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120; 31.260 ISBN 978-2-8322-1087-8

– 2 – IEC TR 62977-1-31:2021/AMD1:2022
© IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRONIC DISPLAYS –
Part 1-31: Generic – Practical information
on the use of light measuring devices

AMENDMENT 1
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
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Amendment 1 to IEC 62977-1-31:2021 has been prepared IEC technical committee 110:
Electronic displays.
The text of this Amendment is based on the following documents:
Draft Report on voting
110/1380/DTR 110/1404A/DVDTR
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.

© IEC 2022
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accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications/.
The committee has decided that the contents of this document will remain unchanged until the
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specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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____________
INTRODUCTION to Amendment 1
This document provides additional information to IEC TR 62977-1-31:2021 regarding the
influence of spectral stray light and spectral bandwidth of a spectroradiometer on chromaticity
measurements. It is described in Annex E.
This document also provides the corrections of editorial errors of IEC TR 62977-1-31:2021. The
corrections are:
– Typos are fixed:
• “fiber” and “x(λ), y(λ), z(λ)” is replaced with “fibre” and “𝑥𝑥(𝜆𝜆),𝑦𝑦(𝜆𝜆),𝑧𝑧(𝜆𝜆)”, respectively in
Figure 2,
• “(%)” in the label of vertical axis is removed in Figure 9, Figure 10, and Figure 12,
• “0” label of the tick mark of vertical axis is replaced with “1” in Figure C.4.
– The lists for Formula (A.1) and Formula (B.1) are aligned.

– 4 – IEC TR 62977-1-31:2021/AMD1:2022
© IEC 2022
Figure 2 – Example of configurations for the input optics and detector
Replace, in Figure 2, Figure 2b) and Figure 2c) with the following new Figure 2b) and Figure
2c):
b) Colorimeter c) Spectroradiometer with spectrometer using
grating and array detector
5.5.2.1 General
Replace, in NOTE 2, the fourth sentence with the following new sentence:
Experimental data demonstrating the influence of spectral stray light in a specific application are shown in Annex E
[12].
Add, after NOTE 2, the following new NOTE 3:
NOTE 3 The influence of spectral bandwidth on chromaticity measurements of narrow spectral linewidth light is
shown in Annex E.
© IEC 2022
Figure 9 – Calculated chromaticity differences as a function of wavelength error
Replace Figure 9 with the following new figure:

a) DUT-1 (chromaticity coordinate, x) b) DUT-1 (chromaticity coordinate, y)

c) DUT-2 (chromaticity coordinate, x) d) DUT-2 (chromaticity coordinate, y)

e) DUT-3 (chromaticity coordinate, x) f) DUT-3 (chromaticity coordinate, y)

– 6 – IEC TR 62977-1-31:2021/AMD1:2022
© IEC 2022
Figure 10 – Calculated chromaticity differences as a function of spectral bandwidth
Replace Figure 10 with the following new figure:

a) DUT-1 (chromati
...