SIST EN 61988-2-1:2012

SLOVENSKI STANDARD
01-maj-2012
3ULND]RYDOQLNLVSOD]PRGHO0HULOQHPHWRGH2SWLþQHLQRSWRHOHNWULþQH
Plasma Display Panels - Part 2-1: Measuring methods - Optical and optoelectrical
Plasmabildschirme - Teil 2-1: Messverfahren - Optisch und Opto-Elektrisch
Panneaux d'affichage à plasma - Partie 2-1: Méthodes de mesure - Optiques, Méthodes
opto-électriques
Ta slovenski standard je istoveten z: EN 61988-2-1:2012
ICS:
31.120 Elektronske prikazovalne Electronic display devices
naprave
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61988-2-1
NORME EUROPÉENNE
March 2012
EUROPÄISCHE NORM
ICS 31.260 Supersedes EN 61988-2-1:2002, EN 61988-2-2:2003

English version
Plasma display panels -
Part 2-1: Measuring methods -
Optical and optoelectrical
(IEC 61988-2-1:2012)
Panneaux d'affichage à plasma -  Plasmabildschirme -
Partie 2-1: Méthodes de mesure - Teil 2-1: Messverfahren – Optisch und
Mesures optiques et opto-électriques opto-elektrisch
(CEI 61988-2-1:2012) (IEC 61988-2-1:2012)

This European Standard was approved by CENELEC on 2012-02-28. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61988-2-1:2012 E
Foreword
The text of document 110/337/FDIS, future edition 2 of IEC 61988-2-1, prepared by IEC TC 110, "Flat
panel display devices" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2012-11-28
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-02-28
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61988-2-1:2002 and EN 61988-2-2:2003.
1:2002:
– EN 61988-2-1:2002 and EN 61988-2-2:2003 were combined and reconstructed in this document.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61988-2-1:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61988-2-1 NOTE  Harmonized as EN 61988-2-1.
IEC 61988-2-2 NOTE  Harmonized as EN 61988-2-2.

- 3 - EN 61988-2-1:2012
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60068-1 - Environmental testing - EN 60068-1 -
Part 1: General and guidance
IEC 60107-1 - Methods of measurement on receivers for EN 60107-1 -
television broadcast transmissions -
Part 1: General considerations -
Measurements at radio and video frequencies

IEC 61988-1 - Plasma display panels - EN 61988-1 -
Part 1: Terminology and letter symbols

IEC 62087 - Methods of Measurement for the power EN 62087 -
consumption of audio, video and related
equipment
CIE 15 - Colorimetry - -
IEC 61988-2-1 ®
Edition 2.0 2012-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plasma display panels –
Part 2-1: Measuring methods – Optical and optoelectrical

Panneaux d’affichage à plasma –

Partie 2-1: Méthodes de mesure – Mesures optiques et opto-électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 31.260 ISBN 978-2-88912-892-1

– 2 – 61988-2-1  IEC:2012
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Structure of measuring equipment . 7
5 Standard measuring conditions . 7
5.1 Environmental conditions . 7
5.2 Set-up conditions . 7
5.2.1 General . 7
5.2.2 Measuring layout . 8
5.2.3 Field frequency . 8
5.2.4 Adjustment of PDP modules . 9
5.2.5 Warm-up condition of PDP modules . 9
5.3 Lighting conditions . 9
5.3.1 Dark-room conditions . 9
5.3.2 Bright-room conditions . 9
6 Measuring methods . 11
6.1 Measuring methods of 4 % window luminance . 11
6.1.1 Purpose . 11
6.1.2 Measuring equipment . 11
6.1.3 Measurement. 11
6.2 Measuring method of luminance uniformity . 12
6.2.1 Purpose . 12
6.2.2 Measuring equipment . 12
6.2.3 Measurement. 12
6.3 Measuring method of dark-room contrast ratio . 13
6.3.1 Purpose . 13
6.3.2 Measuring equipment . 13
6.3.3 Measurement. 14
6.4 Measuring method of bright-room contrast ratio 100/70 . 15
6.4.1 General . 15
6.4.2 Purpose . 15
6.4.3 Measuring equipment . 15
6.4.4 Measurement. 15
6.5 Measuring method of white chromaticity and chromatic uniformity . 16
6.5.1 Purpose . 16
6.5.2 Measuring equipment . 16
6.5.3 Measurement. 16
6.6 Measuring method of colour gamut . 17
6.6.1 Purpose . 17
6.6.2 Measuring equipment . 17
6.6.3 Measurement. 17
6.7 Measuring method of module power and current consumption . 18
6.7.1 Purpose . 18
6.7.2 Measuring equipment . 18
6.7.3 Measurement. 19

61988-2-1  IEC:2012 – 3 –
6.8 Measuring method of module power consumption using video signal . 21
6.8.1 General . 21
6.8.2 Measuring equipment . 21
6.8.3 Applied digital video signal . 21
6.8.4 Image processing board . 21
6.8.5 Measurement. 22
6.9 Measuring method of module luminous efficacy . 23
6.9.1 Purpose . 23
6.9.2 Measuring equipment . 23
6.9.3 Measurement. 23
6.10 Measuring method of panel luminous efficacy . 24
6.10.1 Purpose . 24
6.10.2 Measuring equipment . 24
6.10.3 Panel conditions . 25
6.10.4 Driving waveform . 26
6.10.5 Applied display patterns . 27
6.10.6 Measurement. 27
Annex A (informative) Clause cross-references from the previous edition of
IEC 61988-2-1:2002 and IEC 61988-2-2:2003 to IEC 61988-2-1:2011. 31
Bibliography . 33

Figure 1 – Measuring layout (side view) . 8
Figure 2 – Example of bright-room conditions . 10
Figure 3 – 4 % window luminance measuring pattern . 11
Figure 4 – Measuring points . 13
Figure 5 – Minimum luminance measuring pattern . 15
Figure 6 – Example of the colour gamut measurement . 18
Figure 7 – Example of power and current measuring diagram . 19
Figure 8 – System diagram of sustain power measurement . 25
Figure 9 – Driving system and waveform . 27

Table 1 – Example of luminance uniformity measurement . 13
Table 2 – Example of chromaticity measurement . 17
Table 3 – Example of power and current measurements (for a module that includes an
AC input) . 20
Table 4 – Example of power and current measurement (for a module with DC inputs
only) . 20
Table 5 – Example of measurement results of module power consumption using video
signal . 22
Table A.1 – Clause cross-references . 32

– 4 – 61988-2-1  IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
PLASMA DISPLAY PANELS –
Part 2-1: Measuring methods –
Optical and optoelectrical
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 in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61988-2-1 has been prepared by IEC technical committee 110:
Electronic display devices.
This second edition cancels and replaces the first edition published in 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– The first edition of IEC 61988-2-1 and IEC 61988-2-2 were combined and reconstructed in
this document.
61988-2-1  IEC:2012 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
110/337/FDIS 110/352/RVD
Full information on the voting for the approval on 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 the parts in the IEC 61988 series, under the general title Plasma display panels,
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 web site 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.
– 6 – 61988-2-1  IEC:2012
PLASMA DISPLAY PANELS –
Part 2-1: Measuring methods –
Optical and optoelectrical
1 Scope
This part of IEC 61988 determines the following measuring methods for characterizing the
performance of plasma display modules (PDP modules):
a) four per cent (4 %) window luminance;
b) luminance uniformity;
c) dark-room contrast ratio;
d) bright-room contrast ratio 100/70;
e) white chromaticity and chromatic uniformity;
f) colour gamut in the centre box;
g) module power and current consumption;
h) module power consumption using video signal;
i) module luminous efficacy, and
j) panel luminous efficacy.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-1, Environmental Testing – Part 1: General and guidance
IEC 60107-1, Methods of measurement on receivers for television broadcast transmissions –
Part 1: General considerations – Measurements at radio and video frequencies
IEC 61988-1, Plasma display panels – Part 1: Terminology and letter symbols
IEC 62087, Methods of measurement for the power consumption of audio, video and related
equipment
CIE 15:2004, Colorimetry
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61988-1,
IEC 60068-1, and IEC 60107-1, as well as the following, apply.

61988-2-1  IEC:2012 – 7 –
3.1
4 % window panel luminous efficacy
η
p0,04
panel luminous efficacy measured by displaying the patterns of 4 % white window and full
screen black
NOTE Ohmic loss is smaller than that of full screen panel luminous efficacy (see 3.4).
3.2
full screen panel luminous efficacy
η
p,fs
panel luminous efficacy measured by displaying the patterns of full screen white and full
screen black
NOTE Ohmic loss is larger than that of 4 % window panel luminous efficacy (see 3.4).
3.3
panel checker
system used to drive and test plasma display panel
NOTE Panel checker includes the same or the equivalent electric circuits as a PDP module.
3.4
panel luminous efficacy
luminous efficacy
η
incremental luminous flux (measured as the luminous flux of a white display minus the
luminous flux of a black display) divided by the incremental power input applied to the sustain
driver for operating the panel (measured as the white display power minus the black display
power)
NOTE Expressed in lumens/watt.
4 Structure of measuring equipment
The system diagrams and/or driving conditions of the measuring equipment shall comply with
the structure specified in each item.
5 Standard measuring conditions
5.1 Environmental conditions
Measurements shall be carried out under the standard environmental conditions, i.e. at a
temperature of 25 °C ± 3 °C, a relative humidity of 25 % to 85 %, and a pressure of 86 kPa to
106 kPa. When different environmental conditions are used, these shall be noted on the
report.
5.2 Set-up conditions
5.2.1 General
The following standard set-up conditions shall be used. Each condition shall be noted on the
relevant specification whenever any different conditions other than the standard set-up
conditions are applied.
– 8 – 61988-2-1  IEC:2012
5.2.2 Measuring layout
5.2.2.1 General
Measurements shall be carried out at the standard measuring layout shown in Figure 1. When
a different measuring layout is used, this shall be noted on the report.
5.2.2.2 Position of light measuring device
The light measuring device shall be aligned perpendicular to the area to be measured on the
screen of the PDP module.
5.2.2.3 Standard measuring distance
The standard measuring distance  is 2,5 V, where V is the screen height or the short side
xo
length of the screen. The measuring distance shall be between 1,6 V and 2,8 V. The
measuring distance shall be noted on the report.
5.2.2.4 Aperture angle of light measuring device
The light measuring device shall be set at a proper aperture angle less than or equal to
2 degrees, and shall measure an area of at least 500 pixels which has an extent less than
10 % of the screen height. This area corresponds to including a circular measurement area of
at least 26 lines in diameter in the case of a display panel having a square pixel consisting of
3 subpixels. The measuring distance and the aperture angle may be adjusted to achieve a
viewing area greater than 500 pixels, which has an extent less than 10 % of the screen height
if setting the above aperture angle is difficult. Such deviations from standard conditions shall
be noted on the report.
Display surface
Plasma display
module Light measuring device
Perpendicular to screen
Measuring point
Driving
Driving
signal
power
source equipment

Xo
IEC  44/12
Key
 standard measuring distance = 2,5 V, where V is the screen height or short side length of screen.
X0
Figure 1 – Measuring layout (side view)
5.2.3 Field frequency
The standard field frequency of the driving signal equipment shall be 60 Hz, unless the
module is intended to be used at a significantly different frequency. In any case, the field
frequency used shall be noted on the report.

61988-2-1  IEC:2012 – 9 –
5.2.4 Adjustment of PDP modules
For contrast adjustable PDP modules, adjust the contrast to the maximum value under the
standard environmental conditions.
Automatic control functions such as auto-power control (APC), image sticking prevention
function, etc. by which the display luminance could change during the measurement shall be
turned off or the activation of these functions shall be avoided by some measuring procedures
described below.
When the displayed luminance could be changed by some automatic control functions
included in the PDP module and turning off these functions is not convenient, a procedure
using sequentially changing input images or a procedure using a turn-on, measure and turn-
off sequence shall be applied.
For the procedure of sequentially changing input images, the input signals shall be changed
just before the display luminance is changed and the measurement shall be carried out when
the measured image is displayed. The input signal, except the measured image, should be
any suitable signal that disables the automatic control functions mentioned above.
For the procedure of using a turn-on, measure and turn-off sequence, the PDP module shall
be sequentially turned off and turned on just before the displayed luminance is changed. The
measurement shall be carried out when the measured image is displayed.
The displayed luminance of both procedures mentioned above usually remains constant for
several minutes which are enough for a stable measurement with a light measurement device.
5.2.5 Warm-up condition of PDP modules
The warm-up time shall be longer than 30 minutes with a signal input set at 15 % grey level
on full screen without gamma correction, unless other specified measuring methods are used.
When different warm-up conditions are used, they shall be noted on the report.
5.3 Lighting conditions
5.3.1 Dark-room conditions
Illuminance shall be less than 1 lx anywhere on the screen of the PDP module. When this
illuminance significantly affects the measurement of the black level, the background
subtraction method shall be used. When a different illuminance or the background subtraction
method is used, this shall be noted on the report.
5.3.2 Bright-room conditions
5.3.2.1 General
The lamp shall be adjusted so that the illuminance conditions on vertical and horizontal
planes are satisfied at the centre of the panel, which has been arranged vertically.
The illuminance precision shall be ± 5 % and the measured illuminance shall be clearly noted
on the report. When a different illuminance is used, it shall be noted on the report.
5.3.2.2 Illuminance on the panel
a) Vertical plane illuminance: 100 lx
b) Horizontal plane illuminance: 70 lx
5.3.2.3 Illumination source
AAA colour rendering daylight white (JIS Z 9112-1990 type N-EDL) straight tube fluorescent
lamp should be used. If another kind of lamp is used, it shall be noted on the report with the

– 10 – 61988-2-1  IEC:2012
detail information of the lamp. When the illuminance conditions cannot be met with one lamp,
a group of lamps may be used. It is permissible to use luminance adjustable lamps.
The fluorescent lamp(s) shall be used under the recommended operation conditions: for
example, after 100 hours of ageing but before they have been in use for 2 000 h. Photo
spectrum of the applied lamps shall be included in the detail information.
5.3.2.4 Placement of illumination source and display
The panel shall be mounted in a vertical plane. The long axis of lamp shall be arranged
horizontal to the floor and parallel to the plane of the panel. The centre of the lamp shall be
arranged within a normal vertical plane which is normal to the panel face and intersects the
centre of the panel (see Figure 2).

Luminance adjustable
(Ceiling height: 2,40 m)
fluorescent lamp(s)
Horizontal plane
(6 × 40 W tubes)
Black baffle
illuminance at
centre of panel
Plasma display
Vertical plane
module
illuminance
Light measuring
(Height at screen
device
centre: 0,70 m)
Side view
Horizontal distance
Movable
between lamp and
panel: 2,43 m
Plasma display
module
Luminance adjustable fluorescent

lamp(s) (6 × 40 W tubes)
Black baffle
Top view
Normal vertical plane
Light measuring device
NOTE Details in brackets are for example only.
IEC  45/12
Figure 2 – Example of bright-room conditions
5.3.2.5 Adjustment of illuminance
The illumination shall be adjusted – by adjusting the illumination source output and/or the
position of the lamp(s), and/or by moving the display panel – so that the vertical plane and
horizontal plane illuminance conditions are satisfied. When measuring the illuminance, the
display shall be moved from the measurement position, in order to avoid the light reflection
from the display.
61988-2-1  IEC:2012 – 11 –
5.3.2.6 Others
The walls shall be hung with black curtains, or shall be windowless and grey in colour with a
reflectivity no greater than 20 %. And the floor shall be grey in colour with a reflectivity no
greater than 20 %.
Consideration shall be given to the colour and placement of the measurement system,
including walls, floor, ceiling and persons making the measurements, so that reflected light
does not affect the measured illuminance. A black baffle plate shall be applied to reduce the
reflected light, without shadowing the panel. Once the light source has been turned on, the
illuminance shall be adjusted after it has reached a sufficient stability. An example of a
measurement room is shown in Figure 2.
6 Measuring methods
6.1 Measuring methods of 4 % window luminance
6.1.1 Purpose
The purpose of this method is to measure the luminance of a 4 % window of a PDP module.
6.1.2 Measuring equipment
The following equipment shall be used:
a) driving power source;
b) driving signal equipment; and
c) light measuring device.
6.1.3 Measurement
The PDP module shall be set in the standard measuring conditions and in the dark-room
conditions. The measuring layout is shown in Figure 1. Apply a 4 % window (H/5 × V/5) white
signal of level 100 % at the screen centre to the PDP module and measure the 4 % window
luminance L at the centre P of the white window A as shown in Figure 3.
DR0,04 0 0
2V/5
Measuring point
V/5
2H/5 H/5
H
IEC  46/12
Figure 3 – Four per cent (4 %) window luminance measuring pattern
V
– 12 – 61988-2-1  IEC:2012
6.2 Measuring method of luminance uniformity
6.2.1 Purpose
The purpose of this method is to measure the luminance uniformity of a PDP module.
6.2.2 Measuring equipment
The following equipment shall be used:
a) driving power source;
b) driving signal equipment; and
c) light measuring device.
6.2.3 Measurement
The PDP module shall be set in the standard measuring conditions and in the dark-room
conditions. The measuring layout is shown in Figure 1. Apply a full screen white signal of
level 100 % to the PDP module and measure the luminance L at the specified points P
i i
(where i is 0 to 8 or 0 to 4) on the display screen. Measurements shall be carried out at
five points or nine points. In the case of the display screen shown in Figure 4, measuring
points shall be chosen from P to P or from P to P for five points or nine points,
0 4 0 8
respectively. The luminance non-uniformity at P is:
i
∆L
i
× 100 (%)
L
av
Where, luminance deviation ∆L is given by:
i
∆L = L - L
i i av
Average luminance L for five points is given by:
av
L + L + L + L + L
0 1 2 3 4
L =
av
Or average luminance L for nine points is given by:
av
L + L + L + L + L + L + L + L + L

0 1 2 3 4 5 6 7 8
L =
av
The measured results should be recorded as shown in Table 1.

61988-2-1  IEC:2012 – 13 –
H/2
V/10
P P P
1 5 2
V/2
P P P
8 0 6
V
P P P
4 7 3
H/10
H
NOTE P to P ; Measuring points
0 8
IEC  47/12
Figure 4 – Measuring points
Table 1 – Example of luminance uniformity measurement
Luminance Luminance non-uniformity
Measuring point L ∆L / L × 100

i i av
cd/m
%
P 110 +1,6
P 107 -1,1
P 109 +0,7
P 106 -2,1
P 104 -3,9
P 111 +2,6
P 113 +4,4
P 105 -3,0
P 109 +0,7
Average luminance L : 108 cd/m
av
6.3 Measuring method of dark-room contrast ratio
6.3.1 Purpose
The purpose of this method is to measure the dark-room contrast ratio of a PDP module.
6.3.2 Measuring equipment
The following equipment shall be used:
a) driving power source;
b) driving signal equipment; and

– 14 – 61988-2-1  IEC:2012
c) light measuring device.
6.3.3 Measurement
6.3.3.1 General setting
The PDP module shall be set in the standard measuring conditions and in the dark-room
conditions. The measuring layout is shown in Figure 1.
6.3.3.2 Measurement of 4 % window luminance
Apply the testing input signal displaying the 4 % window A having a size of H/5 × V/5 (see
Figure 3) shall be applied to the PDP module from the driving signal equipment. Arrange the
testing input signal to obtain maximum luminance (100 %) on the 4 % window and minimum
luminance (0 %, black screen) on the other part of the screen. Measure the 4 % window
luminance L at the centre of the white window.
DR0,04
6.3.3.3 Measurement of minimum luminance
Apply the testing input signal displaying one by one each of the four white windows A to A
1 4
shown in Figure 5 to the PDP module from the driving signal equipment. Arrange the testing
input signals to obtain maximum luminance (100 %) on the white window and minimum
luminance (0 %, black screen) on the other part of the screen. Measure the luminance L
BRimin
in Figure 5 (same position in
(where i is 1 to 4) at the "luminance measuring position" P
Figure 3) when Ai (where i is 1 to 4) is lit with maximum luminance. Minimum luminance
L is defined as follows.
DRmin
L + L + L + L
DR1min DR2min DR3min DR4min
L
DRmin =
If the above four measurements L (where i is 1 to 4) are sufficiently uniform (less than
BRimin
5 % variation), it is permitted to measure only one luminance (e.g., L ) as minimum
BR1min
luminance L . In this case the measured display pattern shall be noted on the report.
BRmin
Use a black baffle in case stray light from A to A has an effect on the minimum luminance
1 4
measurement.
6.3.3.4 Procedure to determine the dark-room contrast ratio
The dark-room contrast ratio (DRCR) is given as follows:

61988-2-1  IEC:2012 – 15 –
L
DR0,04
DRCR =
L
DRmin
Luminance measuring position
V/5
(same position in Figure 3)
A A
1 2
V/5
V/5
A A
3 4
V/5
H/5 H/5 H/5 H/5
NOTE Light one window at a time.
IEC  48/12
Figure 5 – Minimum luminance measuring pattern
6.4 Measuring method of bright-room contrast ratio 100/70
6.4.1 General
The bright-room contrast ratio 100/70 (BRCR-100/70) is the value set in the condition where
the vertical plane illuminance is 100 lx and the horizontal plane illuminance is 70 lx.
6.4.2 Purpose
The purpose of this method is to measure the bright-room contrast ratio 100/70 of a PDP
module.
6.4.3 Measuring equipment
The following equipment shall be used:
a) driving power source;
b) driving signal equipment; and
c) light measuring device.
6.4.4 Measurement
6.4.4.1 General setting
The PDP module shall be set in the standard measuring conditions and in the bright-room
conditions. The measuring layout is shown in Figure 1 and Figure 2.
6.4.4.2 Measurement of 4 % window luminance
Apply the testing input signal displaying a 4 % window A having a size of H/5 × V/5 (see
Figure 3) to the PDP module from the driving signal equipment. Arrange the testing input
signal to obtain maximum luminance (100 %) on the 4 % window and minimum luminance
(0 %, black screen) on the other part of the screen.
at the centre of the white window.
Measure the 4 % window luminance L
BR0,04
– 16 – 61988-2-1  IEC:2012
6.4.4.3 Measurement of minimum luminance
Apply the testing input signal displaying one by one each of the four white windows (A to A )
1 4
having a size H/5 × V/5 (see Figure 5) to the PDP module from the driving signal equipment.
Arrange the testing input signals to obtain maximum luminance (100 %) on the white window
and minimum luminance (0 %, black screen) on the other part of the screen. Measure the
luminance L (where i is 1 to 4) at the "luminance measuring position" P in Figure 5
BRimin 0
(same position in Figure 3) when Ai (where i is 1 to 4) is lit with maximum luminance.
Minimum luminance L is defined as follows.
BRmin
L + L + L + L
BR1min BR2min BR3min BR4min
L
BRmin =
If the above four measurements L (where i is 1 to 4) are sufficiently uniform (less than
BRimin
5 % variation), it is permitted to measure only one luminance (e.g., L ) as minimum
BR1min
luminance L . In this case the measured display pattern shall be noted on the report.
BRmin
6.4.4.4 Procedure to determine the bright-room contrast ratio 100/70
The bright-room contrast ratio 100/70 (BRCR-100/70) is given as follows:
L
BR0,04
BRCR-100/70 =
L
BRmin
If AAA colour rendering daylight white (JIS Z 9112-1990 type N-EDL) straight tube fluorescent
lamp is not available and other kind of lamp is used for the illumination source, it should be
noted on the report with the detail information of the applied lamp.
6.5 Measuring method of white chromaticity and chromatic uniformity
6.5.1 Purpose
The purpose of this method is to measure the white chromaticity and chromatic uniformity
(defined as chromaticity deviation) of the display surface of a PDP module.
6.5.2 Measuring equipment
The following equipment shall be used:
a) driving power source;
b) driving signal equipment; and
c) light measuring device.
6.5.3 Measurement
The PDP module shall be set in the standard measuring conditions and in the dark-room
conditions. The measuring layout is shown in Figure 1. Apply a full screen white input signal
of 100 % to the PDP module and measure the white chromaticity C (x y) at the specified
measuring points on the display screen. Where x and y are CIE1931 chromaticity coordinates
defined in CIE 15. Measurement shall be carried out at 1 point (only for white chromaticity
measurement), five points, or nine points. In the case of the display screen shown in Figure 4,
measuring points shall be chosen from P , from P to P or from P to P for one point, five
0 0 4 0 8
points or nine points, respectively. The white chromaticity measured at P is defined as C (x
i i
y ). When each white chromaticity corresponding to P , P . . . P is C (x y ), C (x y ),. . .
i 0 1 8 0 0 0 1 1 1
C (x y ), each chromaticity deviation ∆x , ∆y is given by:
8 8 8 i i
∆x = x - x , ∆y = y - y
I i 0 I i 0
Where i is 1 to 8.
61988-2-1  IEC:2012 – 17 –
The measured results should be recorded as given in Table 2.
NOTE It is permitted to use the following chromaticity deviation ∆u' , ∆v' at each measuring point P after
i i i
transforming x, y chromaticity coordinates to u', v' chromatic coordinates.
∆u' = u' - u' , ∆v' = v' - v'
i i 0 i i 0
Where i is 1 to 8. And u' and v' are CIE 1976 UCS diagram coordinates defined in CIE 15. Where u' = 4x / (3 - 2x +
12y), v' = 9y / (3 - 2x + 12y).
Table 2 – Example of chromaticity measurement
Measuring point x ∆x y ∆y
i i i i
P 0,282 0,000 0,282 0,000
P 0,280 -0,002 0,283 +0,001
P 0,278 -0,004 0,280 -0,002
P 0,279 -0,003 0,285 +0,003
P 0,282 0,000 0,283 +0,001
P 0,277 -0,005 0,279 -0,003
P 0,274 -0,008 0,276 -0,006
P 0,283 +0,001 0,282 0,000
P 0,280 -0,002 0,285 +0,003
6.6 Measuring method of colour gamut
6.6.1 Purpose
The purpose of this method is to measure the colour gamut of a PDP module.
6.6.2 Measuring equipment
The following equipment shall be used:
a) driving power source;
b) driving signal equipment; and
c) light measuring device.
6.6.3 Measurement
The PDP module shall be set in the standard measuring conditions and in the dark-room
conditions. The measuring layout is shown in Figure 1. Apply monochromatic 4 % window
signals (H/5 x V/5) of 100 % level corresponding to colour signal R, G, and B to the PDP
module (see Figure 3). Input R signal and then measure the CIE 1931 chromaticity coordinate
(x y ) (see CIE 15) at the centre of the window. In the same way, measure the chromaticity
R R
coordinate (x y ) for G signal and the chromaticity coordinate (x y ) for B signal. Draw
G G B B
straight lines connecting the three points (x y ), (x y ), and (x y ) on the chromaticity
R R G G B B
diagram. An example of measuring results is shown in Figure 6.
NOTE It is permitted to use the following chromaticity coordinate u', v' of CIE 1976 UCS chromaticity diagram
(see CIE 15) transformed from chromaticity coordinate x, y given by:

– 18 – 61988-2-1  IEC:2012
4x 9y
u' =                   , v' =

3 - 2x + 12y 3 - 2x + 12y
0,9
0,8
(0,21 0,71)
0,7
0,6
y
0,5
...