IEC 61747-30-4:2016

IEC 61747-30-4 ®
Edition 1.0 2016-08
INTERNATIONAL
STANDARD
colour
inside
Liquid crystal display devices –
Part 30-4: Measuring methods for liquid crystal display modules –
Dynamic backlight units
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IEC 61747-30-4 ®
Edition 1.0 2016-08
INTERNATIONAL
STANDARD
colour
inside
Liquid crystal display devices –

Part 30-4: Measuring methods for liquid crystal display modules –

Dynamic backlight units
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120 ISBN 978-2-8322-3608-6

– 2 – IEC 61747-30-4:2016 © IEC 2016
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references. 6
3 Terms, definitionsand abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 6
4 Standard measuring equipment . 7
5 Measuring conditions . 7
5.1 Standard measuring environmental conditions . 7
5.2 Power supply . 7
5.3 Warm-up time . 7
5.4 Standard measuring dark-room conditions . 8
5.5 Standard set-up conditions . 8
5.6 Signal patterns . 8
5.6.1 Full screen pattern . 8
5.6.2 Checkerboard patterns . 9
5.6.3 Increasing window patterns . 9
5.6.4 Line patterns . 10
5.6.5 Moving image . 10
5.6.6 Video signal . 11
6 Measuring methods . 11
6.1 Optical performance . 11
6.1.1 Luminance and uniformity . 11
6.1.2 Chromaticity and uniformity . 12
6.1.3 Window size dependence of luminance and chromaticity . 14
6.1.4 Contrast ratio . 15
6.1.5 Flicker . 16
6.1.6 Judder . 19
6.2 Power consumption . 21
6.2.1 Static power consumption . 21
6.2.2 Dynamic power consumption . 22
Annex A (informative) Example of flicker measurement . 23
Bibliography . 26

Figure 1 – DUT set-up conditions . 8
Figure 2 – Full screen pattern . 9
Figure 3 – Checkerboard patterns . 9
Figure 4 – Increasing window patterns . 10
Figure 5 – Line patterns . 10
Figure 6 – Moving image . 11
Figure 7 − Example of input signal level dependence on chromaticity . 13
Figure 8 – Window size dependence on luminance and chromaticity . 15
Figure 9 – Apparatus arrangement . 17
Figure 10 – Temporal contrast sensitivity function . 18
Figure 11 – Example of the luminance waveform by weighting TCSF . 19

Figure 12 – Dynamic curve of the judder . 21
Figure A.1 – Luminance as a function of time L(t) . 23
Figure A.2 – Power spectrum with Fourier Transform . 23
Figure A.3 – Perceptive power spectrum of example flicker . 24
Figure A.4 – Luminance of example screen flicker by weighting TCSF . 24

Table 1 – APL of increasing window patterns . 10
Table 2 – Temporal contrast sensitivity function . 18
Table A.1 – Luminance values of L'(t). 25

– 4 – IEC 61747-30-4:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIQUID CRYSTAL DISPLAY DEVICES –

Part 30-4: Measuring methods for liquid crystal
display modules – Dynamic backlight units

FOREWORD
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International Standard IEC 61747-30-4 has been prepared by IEC technical committee 110:
Electronic display devices.
The text of this standard is based on the following documents:
FDIS Report on voting
110/753/FDIS 110/769/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 61747 series, published under the general title Liquid crystal
display devices, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

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