IEC 61966-5:2000

INTERNATIONAL IEC
STANDARD
61966-5
First edition
2000-10
Multimedia systems and equipment –
Colour measurement and management –
Part 5:
Equipment using plasma display panels
Systèmes et appareils multimédia –
Mesure et gestion de la couleur –
Partie 5:
Appareils utilisant des afficheurs à plasma

Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are

available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base

publication incorporating amendments 1 and 2.

Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is to be found at the following IEC sources:
• IEC web site*
•
Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL IEC
STANDARD
61966-5
First edition
2000-09
Multimedia systems and equipment –
Colour measurement and management –
Part 5:
Equipment using plasma display panels
Systèmes et appareils multimédia –
Mesure et gestion de la couleur –
Partie 5:
Appareils utilisant des afficheurs à plasma

 IEC 2000  Copyright - all rights reserved
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Commission Electrotechnique Internationale
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International Electrotechnical Commission
For price, see current catalogue

– 2 – 61966-5  IEC:2000(E)
CONTENTS
Page
FOREWORD . 4

Clause
1 Scope . 6

2 Normative references. 6

3 Terms and definitions. 7
4 Letters and symbols. 8
5 Conditions. 8
5.1 Environmental conditions . 8
5.2 Conditions of measurements. 9
5.3 Input digital data . 10
6 Measurement equipment. 11
6.1 Spectroradiometer . 11
6.2 Colorimeter. 11
7 Spectral characteristics and intensity of the primaries and white . 12
7.1 Characteristics to be measured. 12
7.2 Measurement conditions . 12
7.3 Method of measurement . 12
7.4 Presentation of results . 12
8 Basic colorimetric characteristics . 13
8.1 Characteristics to be measured. 13
8.2 Method of calculation. 13
8.3 Presentation of results . 14
9 Tone characteristics. 15
9.1 Characteristics to be measured. 15
9.2 Measurement conditions . 15
9.3 Method of measurement . 15
9.4 Presentation of results . 16
10 Inter-channel dependency. 18
10.1 Characteristics to be measured. 18

10.2 Measurement conditions . 18
10.3 Method of measurement . 19
10.4 Presentation of results . 20
11 Spatial non-uniformity . 21
11.1 Characteristics to be measured. 21
11.2 Measurement conditions . 21
11.3 Method of measurement . 22
11.4 Presentation of results . 23
12 Temporal stability. 24
12.1 Short-term stability. 24
12.1.1 Characteristics to be measured. 24
12.1.2 Measurement conditions . 24

61966-5  IEC:2000(E) – 3 –
Clause Page
12.1.3 Method of measurement. 24

12.1.4 Presentation of results . 24

12.2 Mid-term stability . 25

12.2.1 Characteristics to be measured. 25

12.2.2 Measurement conditions . 25

12.2.3 Method of measurement. 25

12.2.4 Presentation of results . 26

13 Surface reflection. 27

13.1 Characteristics to be measured. 27
13.2 Measurement conditions . 27
13.3 Method of measurement . 27
13.4 Presentation of results . 28
14 Display area ratio characteristics . 28
14.1 Characteristics to be measured. 28
14.2 Measurement conditions . 28
14.3 Method of measurement . 28
14.4 Presentation of results . 29
Annex A (informative) External colour control for colour management in open systems . 30
A.1 Introduction .30
A.2 Colour control in terms of basic and tone characteristics . 30
A.3 Colour control in terms of overall characteristics . 31
Bibliography . 34

– 4 – 61966-5  IEC:2000(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
MULTIMEDIA SYSTEMS AND EQUIPMENT –

COLOUR MEASUREMENT AND MANAGEMENT –

Part 5: Equipment using plasma display panels

FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61966-5 has been prepared by IEC technical committee 100:
Audio, video and multimedia systems and equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
100/148/FDIS 100/166/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 3.
Annex A is for information only.
IEC 61966 consists of the following parts, under the general title: Multimedia systems and
equipment – Colour measurement and management:
Part 1: General
Part 2-1: Colour management – Default RGB colour space – sRGB
Part 3: Equipment using cathode ray tubes
Part 4: Equipment using liquid crystal display panels

61966-5  IEC:2000(E) – 5 –
Part 5: Equipment using plasma display panels

Part 6: Equipment for use on digital data projections

Part 7-1: Colour printers – Reflective prints – RGB inputs

Part 7-2: Colour printers – Reflective prints – CMYK inputs

Part 7-3: Colour printers – Transparent prints

Part 8: Multimedia colour scanners

Part 9: Digital cameras
Part 10: Quality assessment – Colour image in network systems

Part 11: Quality assessment – Impaired video in network systems
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until 2003. At this date the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 6 – 61966-5  IEC:2000(E)
MULTIMEDIA SYSTEMS AND EQUIPMENT –

COLOUR MEASUREMENT AND MANAGEMENT –

Part 5: Equipment using plasma display panels

1 Scope
A series of methods and parameters for colour measurements and management for use in

multimedia systems and equipment is applicable to the assessment of colour production and
reproduction. This part of IEC 61966 deals with equipment using plasma display panels (PDP)
to display colour images for use in multimedia applications.
The methods of measurement standardized in this part of IEC 61966 are designed to make
possible the objective performance assessment and characterization of colour reproduction of
PDP displays which accept red – green – blue analogue or digital signals from electrical input
terminals and output colour images on PDP display screens. For PDP displays to which
analogue signals are applicable, the corresponding digital signals are taken into account. The
measured results are intended to be used for the purpose of equipment specific colour control
in order to attain colour management in open multimedia systems.
This part of IEC 61966 defines input test signals, measurement conditions, methods of
measurement and reporting of the measured data, so as to make possible the colour
management and comprehensive comparison of the results of measurements.
Colour control within equipment is outside the scope of this part of IEC 61966. It does not
specify limiting values for various parameters.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of 61966. For dated references, subsequent amendments to,
or revisions of, any of these publications do not apply. However, parties to agreements based
on this part of 61966 are encouraged to investigate the possibility of applying the most recent
editions of the normative documents indicated below. For undated references, the latest
edition of the normative document referred to applies. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60050-845:1987, International Electrotechnical Vocabulary (IEV) – Chapter 845: Lighting

/ CIE 17.4: 1987, International Lighting Vocabulary (joint IEC/CIE publication)
IEC 61966-3:2000, Multimedia systems and equipment – Colour measurement and
management – Part 3: Equipment using cathode ray tubes
ISO 5-4:1995, Photography – Density measurements – Part 4: Geometric conditions for
reflection density
ISO 9241-8:1997, Ergonomic requirements for office work with visual display terminals (VDTs) –
Part 8: Requirements for displayed colours
ISO/CIE 10526:1999, CIE standard illuminants for colorimetry
ISO/CIE 10527:1991, CIE standard colorimetric observers
CIE 15.2:1986, Colorimetry
61966-5  IEC:2000(E) – 7 –
3 Terms and definitions
For the purpose of this part of IEC 61966, the definitions of IEC 60050-845/CIE 17.4, as well

as the following definitions, apply.

3.1
background
image on a screen of the PDP display other than the interested area of a colour patch

3.2
colour control
effort to convert equipment dependent colour image data to equipment independent data for a
specific colour space including tone characteristics
3.3
colour patch, test area
square colour image on a screen of the PDP display subject to be measured for colour
reproduction, in which input data for the red, green and blue channels are kept constant within
the image area
3.4
CRT
colorimetrically well-controlled equipment using cathode ray tubes to present colour images
with digital inputs for reference
3.5
PDP display
any multimedia equipment using plasma display panels to present colour images
3.6
effective screen height
vertical dimension of the effective screen area
3.7
effective screen area
area where a picture can be produced
3.8
normalized (image) signal
input signal normalized by its full scale value, whose level is of interest in calculation and
evaluation of colour control function within PDP display, see also equation (1)

3.9
uncertainty (of measurement)
parameter, associated with the result of a measurement, that characterizes the dispersion of
the values that could reasonably be attributed to the particular quantity subject to
measurement
1)
See also [16] .
________
1)
Figures in square brackets refer to the bibliography.

– 8 – 61966-5  IEC:2000(E)
4 Letters and symbols
The notations consistently adopted in this part of IEC 61966 are summarized below.

A display area ratio
N
number of bits in digital data for each channel

N −1
M
maximum integer for non-negative N -bit system; M = 2

D digital data applied to red channel

R
D digital data applied to green channel
G
D digital data applied to blue channel
B
R normalized input level to red channel
G normalized input level to green channel
B normalized input level to blue channel
X one of measured raw data using spectroradiometers and colorimeters
corresponding to tristimulus values
Y one of measured raw data using spectroradiometers and colorimeters
corresponding to tristimulus values in candela per square metre
Z one of measured raw data using spectroradiometers and colorimeters
corresponding to tristimulus values
R′ linearized data for red channel taking into account the tone characteristics of the
channel
G′ linearized data for green channel taking into account the tone characteristics of
the channel
B′ linearized data for blue channel taking into account the tone characteristics of
the channel
X ′ one of the tristimulus values normalized by Y (candela per square metre) for
n
peak white
′
Y one of the tristimulus values normalized by Y (candela per square metre) for
n
peak white
Z ′ one of the tristimulus values normalized by Y (candela per square metre) for
n
peak white
5 Conditions
5.1 Environmental conditions
All measurements specified in this standard shall be carried out in a dark room. Particular
attention should be paid to reflected illumination caused by the ambient objects (desktop,
wall, etc.) and to direct illumination from light-emitting indicators of measuring instruments.
A 1 h warm-up time should precede the measurements in 7.2, 9.2, 10.2, 11.2 and 14.2, if not
specified by the manufacturer of the equipment.
The mains voltage and frequency shall be at the rated values specified by the manufacturer of
a PDP display. When the mains voltage fluctuates, a regulated power supply should be used
to maintain the supply voltage within ±5 % of the rated value.
Other environmental conditions such as room temperature and relative humidity shall be
reported together with the results of the measurements.

61966-5  IEC:2000(E) – 9 –
If additional environmental conditions are described in the manufacturer’s specifications,

these should also be taken into account.

5.2 Conditions of measurements

Contrast, brightness and additional adjustments shall be set to the preset positions specified

by the manufacturer of the PDP display under measurement. When the adjustment is set to a

position other than the preset, the position or corresponding value should be reported with the

results of the measurements.
The equipment arrangement for non-contact measurements should be as shown in figure 1. It

incorporates a spectroradiometer or a non-contact colorimeter, depending on the character-
istics to be measured. The instrument optical axis should be normal to the centre of the
surface of the PDP display.
The distance d between the faceplate of the PDP display and the measuring instrument shall
be 4 h or larger, where h is the effective screen height of the display.
NOTE 1 It is recommended to take precautions so that the measurement is not influenced by vibration and that
there are no missing picture elements within the field of view of the measuring instrument.
NOTE 2 The measurement area in the colour patch should include more than 500 picture elements.
PDP
Spectroradiometer
or colorimeter
h
d
Data generator
IEC  1615/2000
Figure 1 – Equipment arrangement for non-contact measurements
The equipment arrangement for contact measurements should be as shown in figure 2, where
a measurement probe is placed on the faceplate of the PDP display.

PDP
Colorimeter
(measuring probe)
(main body)
Data generator
IEC  1616/2000
Figure 2 – Equipment arrangement for contact measurements

– 10 – 61966-5  IEC:2000(E)
Test signals applied to red, green and blue channels shall result in a colour patch of the size

shown in figure 3 on the PDP display. The positioning of the colour patch shall be referred to

by the centre as in figure 3. The background shall be black, unless otherwise specified.

centre
h/5
h/5
IEC  1617/2000
h the effective screen height
Figure 3 – Size of a colour patch
The area for measurement shall be circular, centred on the colour patch, with a diameter
between 0,05 h and 0.,15 h
5.3 Input digital data
The relationship between input digital data, D , D , D , of N bits and corresponding
R G B
normalized signal level for calculation shall be
D
R
i
R =
i
N
2 − 1
D
G
i
G = (1)
i
N
2 − 1
D
B
i
B =
i
N
2 − 1
where an index i denotes the i -th measurement step.
NOTE When the input signal is applicable in analogue voltage, the signal level normalized by the maximum input
voltage should correspond to the signal level for each step defined in equation (1).

61966-5  IEC:2000(E) – 11 –
6 Measurement equipment
6.1 Spectroradiometer
A spectroradiometer with the following specifications should be used for the measurements.

a) Wavelength range including 380 nm to 780 nm

b) Field of view
between 0,1° and 2,0°
c) Wavelength uncertainty less than 0,5 nm throughout the wavelength range
d) Scanning interval 5 nm or less
e) Bandpass 5 nm or less
f) Repeatability 0,001 in x, y and 0,5 % in luminance (cd/m )

g) Uncertainty 0,005 in x, y for red, green, blue and white of a CRT and 4 %
in luminance (cd/m ) for white of the CRT that has a definite
x, y and luminance value
The (x, y) is the CIE 1931 chromaticity coordinate specified in CIE 15.2.
NOTE 1 Periodic calibration should be done with a standard source of known spectral power distribution.
NOTE 2 Further technical details of the design, characterization, and calibration of spectroradiometers can be
found in CIE 63 [17] and JIS Z 8724 [7].
NOTE 3 The standard CRT is referred to because no standard PDP displays exist at the time of publication of this
part of IEC 61966. When it is available, the standard CRT should be replaced by the standard PDP display.
If the spectroradiometer used for measurements does not meet the above specifications, the
model name and specification of the equipment shall be reported together with the results of
measurements.
6.2 Colorimeter
The colorimeter should have the following specifications.
a) Measurement area (contact type) 0 t,05 h o 0,15 h , where h is the effective screen
height of the PDP display
b) Field of view (non-contact type)
any value between 0,1° and 2,0°
c) Spectral responsivity compliant to the CIE 2-degree colour matching func-
tions as defined in ISO/CIE 10527
d) Repeatability 0,001 in x, y and 0,5 % for luminance
e) Uncertainty 0,005 in x, y for red, green, blue and white of the
CRT and 4 % in luminance (cd/m ) for white of the
CRT that has a definite x, y and luminance value

The ( x, y ) is the CIE 1931 chromaticity coordinate defined in CIE 15.2.
NOTE 1 If the original uncertainty of the colorimeter does not meet this recommendation, correction methods are
available to improve the accuracy for the PDP display measurement. (See [5], [6] and [11].)
NOTE 2 The instrument should be calibrated periodically to assure the uncertainty recommendation given in item
e) above.
NOTE 3 The standard CRT is referred to because no standard PDP displays exist at the time of publication of this
part of IEC 61966. When it is available, the standard CRT should be replaced by the standard PDP display.
The readings of the colorimeter, X , Y (in candela per square metre), and Z shall be
normalized by the luminance level of a peak neutral colour (white), Y (in candela per square
n
metre), as follows:
– 12 – 61966-5  IEC:2000(E)
X
′
X =
Y
n
Y
′ =
Y (2)
Y
n
Z
′
Z =
Y
n
If the colorimeter used for measurements does not meet the above specifications, the model
name and specification of the equipment shall be reported together with the results of

measurements.
NOTE 1 It is known that small tilt angles of the contact-measuring head on the surface of the PDP display can
lead with some instruments to large chromaticity errors. Therefore, care should be taken.
NOTE 2 Synchronization of the colorimeter and scan timing of the PDP display should be taken into account.
7 Spectral characteristics and intensity of the primaries and white
7.1 Characteristics to be measured
Spectral radiance distributions and corresponding tristimulus values for the peak of three
primaries, red – green – blue, as well as white.
7.2 Measurement conditions
The arrangement of equipment shall be as in figure 1 with the spectroradiometer.
The colour signal shall be so generated that the colour patch is positioned at the centre of the
PDP display under measurement.
Digital data for the background shall be D = 0, 0D =, 0D.=
R G B
7.3 Method of measurement
The centred colour patches shall be generated following the measurement steps as shown in
N
table 1, where M=−21 and N is the number of bits per channel.
Table 1 – Input data for peak primaries and peak white
Steps Colours D D D
R G B
1 Peak red 00
M
2 Peak green 0 0
M
3 Peak blue 0 0
M
4 Peak white
MMM
Spectral radiance distributions r(λ), )g(λ, )b(λ, )w(λ for peak red, green, blue and white
images on the PDP display shall be measured successively by the spectroradiometer.
Readings of the spectroradiometer, X , Y , Z , shall also be noted, where the suffix C
C C C
corresponds to R, G, B for primary colours; and to W for the peak white, respectively.
7.4 Presentation of results
The measured data for spectral radiance distributions shall be reported for peak colours red,
green, blue, and white.
61966-5  IEC:2000(E) – 13 –
The spectral radiance distributions r(λ), )g(λ, )b(λ shall be plotted for peak colours red,

green, and blue, respectively, as illustrated in figure 4.

The readings of the spectroradiometer with an emulation function of colorimeters, X , Y ,

C C
Z , for peak red, green, blue and white shall be reported as a table as shown in table 2.
C
0,004
0,0035
r(λ)
0,003
0,0025
0,002
g(λ)
b(λ)
0,0015
0,001
0,0005
400 450 500 550 600 650 700 750
IEC  1618/2000
Wavelength (nm)
Figure 4 – An example of the spectral radiance distributions r(λ) , g(λ) , b(λ)
Table 2 – Example of reporting form for colours in maximum excitations
Colours
XY (cd/m ) Z
Peak red 34,77 19,73 0,64
Peak green 16,18 40,82 5,12
Peak blue 17,59 14,37 75,53
Peak white 67,83 73,73 82,59
8 Basic colorimetric characteristics
8.1 Characteristics to be measured
Linear relation between maximum input excitation and the tristimulus values of light output.

8.2 Method of calculation
The reported results of measurement in 7.4 shall be used to obtain tristimulus values to
characterize the three primaries, red - green - blue, as well as white. The luminance in
candela per square metre shall be normalized as in equation (3) for red, green, blue and white
replacing the suffix C by R, G, B, and W, respectively;
X
C
′
X =
C
Y
n
Y
C
Y ′ = (3)
C
Y
n
Z
C
Z ′ =
C
Y
n
where the normalization factor Y is the measured luminance value in candela per square
n
metre for peak white, which is reported in table 2.

Relative light output
– 14 – 61966-5  IEC:2000(E)
The CIE 1931 x, y chromaticity coordinate values, x , y , z shall be calculated for primary
C C C
colours and for white as defined in CIE 15.2, where suffix C corresponds to R, G, B for

primary colours, and to W for white, respectively.

X ′
C
x =
C
′ ′ ′
X + Y + Z
C C C
′
Y
C
y = (4)
C
X ′ + Y ′ + Z′
C C C
z =1− x − y
C C C
The elements of a 3 × 3 matrix, S , defined as

′
 X   R 
   
′
Y = S G (5)
   
   
′
Z B
   
shall be decided as in
 x / y x / y x / y  S 0 0 
R R G G B B R
  
S = 1 1 1 0 S 0 (6)
  
G
  
z / y z / y z / y 0 0 S
 R R G G B B  B 
where S , S , S are solutions of equation (7);
R G B
 x y x y x y   S   x y 
R R G G B B R W W
     
1 1 1 S = 1 (7)
     
G
     
z y z y z y S z y
 R R G G B B   B   W W 
and R , G and B are defined by equation (1) and have the values 0 or 1 corresponding to
peak excitations.
8.3 Presentation of results
The tristimulus values multiplied by 100 and the CIE 1931 x, y chromaticity coordinate values
shall be reported as a table, as shown in table 3.
Table 3 – Example of reporting form

Tristimulus values Chromaticity coordinates
Colours
y
x
X ′ Y ′ Z′
Peak red 47,16 26,76 0,87 0,636 0,358
Peak green 21,94 55,36 6,94 0,265 0,657
Peak blue 23,86 19,49 102,44 0,164 0,134
Peak white 92,00 100,00 112,02 0,303 0,329
′ ′
NOTE CIE 1976 UCS coordinate values, u , v and CIELAB values,
L * , a * , b * defined in CIE 15.2 may additionally be reported.
The coefficient matrix in equation (5) shall be reported as shown.
 0,463 3 0,213 5 0,243 2 
 
S = 0,262 9 0,538 5 0,198 6
 
 
0,008 5 0,067 6 1,044 1
 
61966-5  IEC:2000(E) – 15 –
The correlated colour temperature, defined in 5.5 of CIE 15.2, for peak white shall also be

calculated and reported in kelvins, together with the deviation δ .
uv
NOTE For the recommended procedure to calculate correlated colour temperatures, refer to [15].

9 Tone characteristics
9.1 Characteristics to be measured

Non-linear transfer relationship between the normalized input signal level applied to each of

the red, green and blue channels and the normalized tristimulus values measured on a PDP

display.
9.2 Measurement conditions
The arrangement of equipment shall be as in figure 1 with colorimeter or figure 2.
The input data D , D , D for measurement step i shall be so applied as to generate
R G B
i i i
colour patches positioned at the centre of the PDP display under measurement (see figure 3).
The digital input data for the background shall be D = 0, 0D =, 0D = .
R G B
NOTE 1 For the relationship between digital data D , D , D and values of R , G , B , see equation (1).
R G B
NOTE 2 If the analogue input is used, the input signal should be of the same level which corresponds to the
digital data.
9.3 Method of measurement
The centred colour patches shall be displayed for values of input data D , D and D from
R G B
1 2
N N N
0, 2 , 2 , …, to M 2 1
= −
m m
where
m + 1 is the number of data and should be at least 33;
N is the number of bits per channel.
For the red channel measurement, D = D = 0 ; for the green channel, D = D = 0, and for the
G B R B
blue channel, D = D = 0 shall be kept, respectively.
R G
The readings of the colorimeter for each colour patch on the PDP display shall be recorded
i i i
successively and noted as X , Y , Z , where the subscript C shall be replaced by R, G and
C C C
B, for the red, green, and blue channels, respectively; and the superscript i corresponds to
measurement steps, i = 0, 1, 2, . m .
The measured tristimulus values shall be normalized by the values corresponding to the
N
maximum excitation for the last step with input data = 2 −1.
m M
– 16 – 61966-5  IEC:2000(E)
i
X
C
X ′′ =
iC
m
X
C
i
Y
C
′′
Y = (8)
iC
m
Y
C
i
Z
C
′′
Z =
iC
m
Z
C
where the subscript C shall be replaced by R, G and B.

9.4 Presentation of results
1 1
0,9
0,8
0,7
0,1
0,6
0,5
0,4 0,01
0,3
0,2
0,1
0,001
0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 0,1 1
Normalized data input R Normalized data input R
1 1
0,9
0,8
0,7 0,1
0,6
0,5
0,4
0,01
0,3
0,2
0,1
0,001
0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 0,1 1
Normalized data input G Normalized data input G

1 1
0,9
0,8
0,7 0,1
0,6
0,5
0,4
0,01
0,3
0,2
0,1
0,001
0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 0,1 1
IEC  1619/2000
Figure 5 – Measured points and interpolated curves
Normalized light output Normalized light output
Normalized light output
Normalized light output Normalized light output
Normalized light output
61966-5  IEC:2000(E) – 17 –
X Y Z
The measured and normalized data ′′ , ′′ and ′′ for 0 ≤ i ≤ m shall be reported as linear
i i i
C C C
and logarithmic plots for C= R, G, B with the interpolated non-linear transfer relation, as

shown in figure 5.
The basic normalized data defined by equation (8) shall also be reported as shown in table 4.

Table 4 – An example set of basic normalized data for tone characteristics

i
X ′′ Y ′′ Z′′ X ′′ Y ′′ Z′′ X ′′ Y ′′ Z′′
R R R G G G B B B
0 0,004 9 0,008 1 0,205 0 0,003 7 0,002 2 0,017 6 0,0000 0,000 7 0,0000

1 0,005 5 0,009 1 0,212 5 0,004 3 0,002 0 0,002 0 0,000 6 0,000 7 0,000 1
2 0,014 0 0,019 6 0,226 8 0,008 7 0,007 4 0,007 8 0,002 8 0,004 9 0,001 5
3 0,020 8 0,026 4 0,232 1 0,016 7 0,014 0 0,015 6 0,004 5 0,005 6 0,006 2
4 0,021 7 0,027 3 0,233 0 0,018 5 0,015 7 0,021 5 0,005 7 0,006 3 0,007 7
5 0,026 2 0,031 8 0,237 1 0,021 0 0,021 1 0,029 3 0,011 4 0,012 5 0,014 2
6 0,033 8 0,039 4 0,242 7 0,030 3 0,028 9 0,029 3 0,015 9 0,018 1 0,020 8
7 0,042 1 0,047 5 0,248 7 0,040 2 0,039 0 0,039 1 0,022 7 0,024 4 0,029 9
8 0,056 2 0,061 6 0,258 7 0,047 0 0,049 8 0,052 7 0,036 4 0,038 3 0,042 5
9 0,069 9 0,075 3 0,270 9 0,064 3 0,066 2 0,064 5 0,044 9 0,048 7 0,054 3
10 0,084 4 0,089 7 0,282 6 0,079 1 0,082 4 0,072 3 0,058 0 0,062 6 0,071 0
11 0,103 3 0,108 5 0,295 8 0,095 8 0,100 7 0,093 8 0,071 6 0,077 9 0,086 7
12 0,123 4 0,128 5 0,308 3 0,118 7 0,123 8 0,103 5 0,093 8 0,100 2 0,107 1
13 0,144 0 0,149 0 0,327 0 0,140 3 0,145 1 0,136 7 0,116 0 0,120 4 0,128 6
14 0,169 9 0,174 7 0,347 6 0,168 1 0,172 5 0,169 9 0,141 0 0,146 8 0,155 8
15 0,197 3 0,202 0 0,368 1 0,197 2 0,201 5 0,185 5 0,164 9 0,172 6 0,180 9
16 0,229 2 0,233 8 0,394 5 0,226 2 0,231 9 0,218 8 0,194 4 0,202 5 0,210 0
17 0,258 4 0,262 9 0,411 4 0,258 3 0,264 2 0,250 0 0,224 6 0,232 4 0,239 8
18 0,293 1 0,297 3 0,440 6 0,292 3 0,298 3 0,287 1 0,263 2 0,270 7 0,275 9
19 0,330 3 0,334 5 0,467 5 0,333 7 0,340 0 0,330 1 0,302 4 0,311 8 0,313 8
20 0,370 2 0,374 0 0,498 9 0,369 6 0,375 7 0,351 6 0,343 9 0,351 4 0,356 9
21 0,412 2 0,415 8 0,530 6 0,414 7 0,421 6 0,406 3 0,386 0 0,395 3 0,399 4
22 0,460 1 0,463 6 0,585 9 0,448 1 0,456 1 0,447 3 0,434 9 0,441 9 0,444 7
23 0,502 7 0,505 7 0,616 4 0,500 6 0,509 1 0,496 1 0,480 4 0,488 5 0,493 3

24 0,551 8 0,554 7 0,658 3 0,546 4 0,552 0 0,543 0 0,533 3 0,540 0 0,544 8
25 0,604 9 0,607 4 0,689 4 0,597 7 0,603 7 0,599 6 0,585 0 0,590 8 0,595 3
26 0,661 1 0,663 5 0,735 9 0,652 0 0,656 4 0,650 4 0,634 5 0,639 5 0,640 1
27 0,713 7 0,715 8 0,761 4 0,705 8 0,711 5 0,707 0 0,690 7 0,697 3 0,697 3
28 0,775 6 0,777 6 0,817 0 0,766 4 0,770 3 0,761 7 0,757 2 0,761 3 0,762 2
29 0,832 1 0,833 2 0,876 2 0,819 5 0,822 3 0,818 4 0,825 5 0,826 7 0,829 5
30 0,885 2 0,886 0 0,914 5 0,880 1 0,885 8 0,882 8 0,885 7 0,888 0 0,885 2
31 0,951 5 0,951 9 0,970 4 0,949 3 0,951 5 0,951 2 0,943 7 0,944 3 0,943 5
32 1,000 0 1,000 0 1,000 0 1,000 0 1,000 0 1,000 0 1,000 0 1,000 0 1,000 0
NOTE For use of the reported data for external colour control of the PDP display, aiming at colour management in
open systems, refer to annex A.

– 18 – 61966-5  IEC:2000(E)
10 Inter-channel dependency
10.1 Characteristics to be measured

′ ′ ′
Inter-channel relationship between input data and tristimulus values, X , Y , Z , of displayed

colours.
The relationship depending upon channel interaction shall be defined as follows:

 1 
 
′
R
 
 
′
G
 
′
 X 
  ′
 B 
′
Y = S × T (9)
 
 
′ ′
R G
 
 
′
Z
 
 
′ ′
G B
 
′ ′
B R
 
 
′ ′ ′
R G B
 
′ ′ ′
where the variables R , G , B are data obtained by interpolation of measured data, which
′′ ′′ ′′
are reported as X , Y , Z in table 4, namely
R G B
′ ′′
R = X
R
′ ′′
G = Y (10)
G
B′ = Z ′′
B
′ ′ ′
and dependent variables X , Y , Z are measured and normalized tristimulus values of light
output in accordance with equation (2). In equation (9), S is the matrix reported in 8.3 and T
is 3 × 8 matrix as follows:
 s s s 
11 12 13
 
S = s s s
 
21 22 23
 
s s s
31 32 33
 
 
t t t t t t t t
0 1 2 3 4 5 6 7
 
X X X X X X X X
 
T= t t t t t t t t
0 1 2 3 4 5 6 7
Y Y Y Y Y Y Y Y
 
 t t t t t t t t 
0 1 2 3 4 5 6 7
Z Z Z Z Z Z Z Z
 
NOTE The matrix S obtained and reported in 8.3 defines the dominant relation, and the matrix T defines the
inter-channel relations among red – green – blue channels.
10.2 Measurement conditions
The arrangement of equipment should be as in figure 1 or figure 2.
The input signal shall be so applied as to generate the colour patch of figure 3 positioned at
the centre of the screen of the PDP display under measurement.
The input data for the background shall be D = 0, 0D = , and D = 0 .
R G B
61966-5  IEC:2000(E) – 19 –
10.3 Method of measurement
The centred colour patches shall be displayed with the input data following the measurement

steps as shown in table 5 for 32 colours.

Table 5 – Digital inputs to generate colour patches

for measurement of inter-channel dependency

D D D
Step, i Colour
R G B
1Grey 1 D D D
1 1 1
2Grey 2 D D D
2 2 2
3Grey 3 D D D
3 3 3
4Grey 4 D D D
4 4 4
5Grey 5 D D D
5 5 5
6Grey 6 D D D
6 6 6
7Grey 7 D D D
7 7 7
8Grey 8 D D D
8 8 8
9 Red 1 D D D
4 0 0
10 Red 2 D D D
6 2 2
11 Red 3 D D D
8 0 0
12 Red 4 D D D
8 4 4
13 Green 1 D D D
0 4 0
14 Green 2 D D D
2 6 2
15 Green 3 D D D
0 8 0
16 Green 4 D D D
4 8 4
17 Blue 1 D D D
0 0 4
18 Blue 2 D D D
2 2 6
19 Blue 3 D D D
0 0 8
20 Blue 4 D D D
4 4 8
21 Yellow 1 D D D
4 4 0
22 Yellow 2 D D D
6 6 2
23 Yellow 3 D D D
8 8 0
24 Yellow 4 D D D
8 8 4
25 Magenta 1 D D D
4 0 4
26 Magenta 2 D D D
6 2 6
27 Magenta 3 D D D
8 0 8
28 Magenta 4 D D D
8 4 8
29 Cyan 1 D D D
0 4 4
30 Cyan 2 D D D
2 6 6
31 Cyan 3 D D D
0 8 8
32 Cyan 4 D D D
4 8 8
In table 5, the values of data D shall be
k
N −3

2 k     for k = 0,.,7,
D =

k
N −3

2 k −1  for k = 8.

where N is the number of bits per channel.

– 20 – 61966-5  IEC:2000(E)
The tristimulus values ′ , ′ , ′, normalized in accordance with equation (2), shall
X Y Z
i i i
successively be measured by the colorimeter for i = 1 to i = 32 for all colour patches on the

PDP display.
The data R′ = X ′′ , G′ = Y ′′ , and B′ = Z′′ , corresponding to D , D , D in table 5, shall
i R i G i B R G B
i i i i i i
be calculated by interpolation using the set of data reported in table 4. Values of coefficient

matrix, T, defined in equation (9) shall be calculated as follows:

t
−1
 
−1 t t
T=S ()D D D A
 
 
where the matrices T and A are defined as follows:
 
1RG′′ B′ RG′′ G′B′ B′R′ RG′′B′
11 1 11 1 1 1 1 11 1
 
1RG′′ B′ RG′ ′ G′′B B′′R RG′′B′
 22 2 22 2 2 2 2 22 2 
=
D
 
� �� � � � � �
 
 
1RG′′ B′ RG′ ′ G′′B B′′R RG′′B′
 32 32 32 32 32 32 32 32 32 32 32 32
XY′′ Z′
 
11 1
 
XY′′ Z ′
 22 2 
A =
 
�� �
 
XY′′ Z′
 
32 32 32
10.4 Presentation of results
T
The matrix shall be reported as shown below.
 − 0,009 8 1,077 6 0,007 2 0,024 5 − 0,047 7 0,002 3 − 0,049 9 0,028 0
 
T = 0,003 9 − 0,008 9 0,995 2 − 0,007 6 0,076 4 0,082 1 0,015 5 − 0,191 3
 
 
0,004 3 − 0,006 7 − 0,004 3 1,055 0 0,012 0 0,064 6 0,049 5 − 0,129 4
 
The measured and normalized data shall also be reported as shown in table 6.

61966-5  IEC:2000(E) – 21 –
Table 6 – Example of normalized tristimulus values (the matrix A )

i
X ′ Y ′ Z′
1 0,011 4 0,013 5 0,011 3
2 0,044 2 0,048 7 0,053 4
3 0,109 3 0,120 9 0,131 2
4 0,209 4 0,228 9 0,254 8
5 0,346 9 0,376 7 0,429 4
6 0,519 7 0,558 3 0,647 1
7 0,724 5 0,774 0 0,898 8
8 0,938 7 1,000 0 1,164 2
9 0,108 5 0,062 2 0,001 7
10 0,292 2 0,190 0 0,058 0
11 0,495 9 0,281 3 0,008 4
12 0,601 7 0,453 1 0,262 9
13 0,049 5 0,124 8 0,016 2
14 0,153 9 0,321 9 0,090 2
15 0,215 5 0,541 5 0,069 6
16 0,381 2 0,650 9 0,310 5
17 0,058 3 0,048 8 0,236 7
18 0,179 8 0,159 6 0,608 3
19 0,265 0 0,215 3 1,111 5
20 0,424 6 0,403 0 1,129 5
21 0,148 1 0,184 9 0,012 7
22 0,390 1 0,469 4 0,092 4
23 0,701 7 0,838 7 0,077 7
24 0,764 4 0,892 4 0,329 8
25 0,165 1 0,109 6 0,247 2
26 0,419 8 0,298 1 0,630 7
27 0,748 6 0,490 0 1,154 9
28 0,803 3 0,624 7 1,171 9
29 0,127 4 0,192 2 0,270 6
30 0,312 1 0,457 5 0,666 0
31 0,507 7 0,802 2 1,235 9
32 0,616 3 0,859 8 1,236 6
NOTE For use of the reported data for external colour control of the PDP display, aiming at colour management in
open systems, refer to annex A.
11 Spatial non-uniformity
11.1 Characteristics to be measured
Non-uniformity of lightness (see IEV 845-03-54 and IEV 845-03-56) and chromaticity
coordinates over the entire PDP display screen.
11.2 Measurement conditions
The arrangement of the equipment should be as in figure 2.

– 22 – 61966-5  IEC:2000(E)
11.3 Method of measurement
The data D = M , D = M , and D = M shall be applied to display white over the entire PDP
R G B
N
display surface, where M=−21 and N is the number of bits per channel.

Tristimulus va
...