IEC 62341-5-3:2019

IEC 62341-5-3 ®
Edition 2.0 2019-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –
Part 5-3: Measuring methods of image sticking and lifetime

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IEC 62341-5-3 ®
Edition 2.0 2019-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Organic light emitting diode (OLED) displays –

Part 5-3: Measuring methods of image sticking and lifetime

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120; 31.260 ISBN 978-2-8322-7506-1

– 2 – IEC 62341-5-3:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Measuring configuration . 7
4.1 General . 7
4.2 Light measuring device (LMD) . 8
5 Standard measuring conditions . 8
5.1 Standard measuring environmental conditions . 8
5.2 Standard measuring darkroom conditions . 8
5.3 Standard setup conditions . 8
5.3.1 General . 8
5.3.2 Adjustment of OLED display modules . 9
5.3.3 Starting conditions of measurements . 9
5.3.4 Test patterns . 9
5.3.5 Conditions of measuring equipment . 12
6 Measuring methods of image sticking . 12
6.1 Purpose . 12
6.2 Measuring method . 12
6.2.1 Measuring equipment . 12
6.2.2 Measuring procedure . 13
6.3 Analysis and report . 14
6.3.1 Analysis . 14
6.3.2 Report . 16
7 Measuring methods of the luminance lifetime . 18
7.1 Purpose . 18
7.2 Measuring method . 18
7.2.1 Measuring equipment . 18
7.2.2 Measuring procedure . 19
7.2.3 Estimation of luminance lifetime . 19
7.3 Analysis and report .
Annex A (informative)  Calculation method of equivalent signal level Calculating
method for equivalent signal level to reflect the characteristics of the OLED display . 24
A.1 Purpose . 24
A.2 Determining the equivalent signal level . 24
A.2.1 General . 24
A.2.2 Calculation of the normalized luminance intensity . 24
A.2.3 Extraction of the equivalent signal level from the IEC 62087:2011 10-
min video loop Examples of extracted equivalent signal level . 27
Annex (informative) Acceleration test of lifetime measurement.
Annex B (informative) Colour difference with CIEDE2000 . 36
B.1 Purpose . 36
B.2 Calculation of colour difference . 36
Bibliography . 37

Figure – Test pattern for image sticking .
Figure – An example of the burn-in image .
Figure – An example of Weibull distribution of lifetime .
Figure – Accumulated colour intensity of IEC 62087:2011 10-min video loop in RGB
subpixel format with equivalent signal distribution chart based on the left images,
respectively .
Figure – Accumulated colour intensity of the IEC 62087:2011 10-min video loop in W,
R, G, and B format, with equivalent signal distribution chart based on the left images,
respectively .
Figure – Examples of Weibull distributions of accelerated lifetime test .
Figure 1 – Measuring system and arrangement . 7
Figure 2 – Test pattern for SDR displays. 11
Figure 3 – Image sticking measuring area . 11
Figure 4 – Test pattern for HDR displays . 12
Figure 5 – Example of the resulting image after image stress . 14
Figure 6 – Example of luminance behavior in operation for an OLED display panel or
module . 19
Figure 7 – Example of lifetime estimation with the extrapolation method . 21
Figure 8 – Examples of estimated lifetime depending on the time elapsed . 22
2 2
Figure A.1 – Measured 10 mA/cm to 80 mA/cm OLED degradation values and
corresponding modelled functions with m = 1 / 1,7 . 25
Figure A.2 – Example of accumulated colour intensity of IEC 62087:2011 10-min video
loop in RGB subpixel format with equivalent signal distribution chart based on the left

images . 30
Figure A.3 – Example of accumulated colour intensity of the IEC 62087:2011 10-min
video loop in W, R, G, and B format, with equivalent signal distribution chart based on
the left images . 32

Table – An example of measuring distance and radius size .
Table – An example of typical value .
Table – An example of the image sticking time with reference .
Table – An example of the image sticking data at target time .
Table – Examples of lifetime measurement .
Table – Summary of the acceleration test results in Figure B.1 .
Table – Statistical analysis results of the accelerated lifetime test in Figure B.1 .
Table 1 – Examples of maximum and average code value extracted from video
samples . 11
Table 2 – Information on test pattern . 17
Table 3 – Example of typical value . 17
Table 4 – Reporting format of the image sticking data at target time . 18
Table 5 – Reporting format of the image sticking time with threshold . 18
Table A.1 – Examples of the maximum and the minimum average equivalent signal
levels (8 bits) . 28

– 4 – IEC 62341-5-3:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ORGANIC LIGHT EMITTING DIODE (OLED) DISPLAYS –

Part 5-3: Measuring methods of image sticking and lifetime

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes
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International Standard IEC 62341-5-3 has been prepared by IEC technical committee 110:
Electronic displays.
This second edition replaces the first edition published in 2013. This edition constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the measurement vehicle for lifetime is only for the module;
b) the measurement method for monitor or TV devices is modified;
c) the digital signage display is included as an example of OLED devices;
d) the measurement method with HDR (high dynamic range) for image sticking is added;
e) the analysis method with CIEDE 2000 is added for image sticking;
f) the information method for evaluating image sticking is modified.
The text of this standard is based on the following documents:
FDIS Report on voting
110/1134/FDIS 110/1154/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 62341 series, under the general title Organic light emitting
diode (OLED) displays, 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 62341-5-3:2019 RLV © IEC 2019
ORGANIC LIGHT EMITTING DIODE (OLED) DISPLAYS –

Part 5-3: Measuring methods of image sticking and lifetime

1 Scope
This part of IEC 62341 specifies the standard measurement conditions and measurement
measuring methods for determining the image sticking and lifetime of organic light emitting
diode (OLED) display panels and modules, except finalized display products for end
customers, such as TV sets, monitor sets and mobile phones. It The measuring method for
the lifetime mainly applies to modules.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60050 (all parts), International Electrotechnical Vocabulary (available at
)
IEC 60050-845, International Electrotechnical Vocabulary (IEV) – Part 845: Lighting
(available at )
IEC 62087:2011, Methods of measurement for the power consumption of audio, video and
related equipment
IEC 62341-1-2:2007, Organic light emitting diode (OLED) displays – Part 1-2: Terminology
and letter symbols
IEC 62341-6-1:20092017, Organic light emitting diode (OLED) displays – Part 6-1: Measuring
methods of optical and electro-optical parameters
IEC 61966-2-1:1999, Multimedia systems and equipment – Colour measurement and
management – Part 2-1: Colour management –Default RGB colour space – sRGB
ISO 11664-1, Colorimetry – Part 1: CIE standard colorimetric observers
CIE 15-2004, Colorimetry
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62341-1-2:2007 and
IEC 60050-845:1987 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/

• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
equivalent current density
average current density of a certain pixel calculated from a varying luminance per frame
image in a moving picture so that luminance degradation becomes similar at the same time
Note 1 to entry: See Annex A.
3.1.2
equivalent signal level
digital code value from 0 to 255 (in the case of 8 bits) transformed from the normalized
luminance of a certain pixel by a gamma specified opto-electronic transfer function (OETF)
Note 1 to entry: See Annex A.
3.2 Abbreviated terms
For the purposes of this document, the following abbreviated terms apply.
APL average picture level
CIELAB CIE 1976(L*a*b*) colour space
DUT devices under test
EOTF electro-optical transfer function
FWHM full-width-at-half-maximum
HDR high dynamic range
LMD light measuring device
OETF opto-electronic transfer function
OLED organic light emitting diode
PQ perceptual quantizer
SDR standard dynamic range
4 Measuring configuration
4.1 General
The system diagrams and/or operating conditions of the measuring equipment shall comply
with the structure specified in each item. The measuring system and its arrangement are
shown in Figure 1. The details are given in Clause 5.

Figure 1 – Measuring system and arrangement

– 8 – IEC 62341-5-3:2019 RLV © IEC 2019
4.2 Light measuring device (LMD)
The LMD as defined in IEC 62341-6-1:2009 shall be used. Specifically, the accuracy of the
LMD at 1 degree of the measurement field angle is recommended as being ≤ ±3%, and with a
repeatability ≤ ±0,5%.
The optical properties of displays shall generally be expressed in photometric or colorimetric
units using the CIE 1931 standard colorimetric two-degree observer (see ISO 11664-1).
Luminance can be measured by a photometer, and the CIE tristimulus values (X, Y, Z) or CIE
chromaticity coordinates by a colorimeter. A spectroradiometer can also obtain photometric
and colorimetric values through a numerical conversion of the measured spectral radiance
data (see, for example, [1] ). The following requirements are given for these instruments:
The LMD shall be a luminance meter, colorimeter, or a spectroradiometer. For DUTs that
have sharp spectral peak full-width-at-half-maximums (FWHMs) smaller than 20 nm, a
spectroradiometer should be used. A filter colorimeter should generally not be used for light
sources with sharp spectral peaks. If they are used, the colorimeter shall be calibrated with a
narrow bandwidth spectroradiometer to give the same results for the specific spectrum.
Report the characteristics of the spectroradiometer which is used for calibration. For light
sources with sharp spectral peaks, the maximum bandwidth of the spectroradiometer shall be
≤ 5 nm. The higher resolution spectroradiometer produces a more accurate colour
measurement. In those cases, the wavelength accuracy shall be within ±0,5 nm. The
spectroradiometer shall be capable of measuring spectral radiance over at least the 380 nm to
780 nm wavelength range, with a maximum bandwidth of 10 nm for smooth broadband
spectra (i.e. broad spectrum with no sharp spikes).
Care shall be taken to ensure that the LMD has enough sensitivity and dynamic range to
perform the required task. Before measuring the DUT, the LMD specification shall be checked.
5 Standard measuring conditions
5.1 Standard measuring environmental conditions
The standard measuring environmental conditions specified in IEC 62341-6-1:20092017, 5.1,
shall be applied. For image sticking measurements, the environmental temperature shall be
controlled at 25 °C ± 2 3 °C, otherwise a temperature-controlled detector shall be used. (The
stability of the LMD shall be less than 1/5 of the intended detecting difference levels of
luminance and colour.)
5.2 Standard measuring darkroom conditions
The standard measuring darkroom conditions specified in IEC 62341-6-1:20092017, 5.2, shall
be applied.
5.3 Standard setup conditions
5.3.1 General
For the measurement area, the minimum radius for measurement with the distance and
aperture angle is explained in Table 1.
____________
Numbers in square brackets refer to the Bibliography.

Table 1 – An example of measuring distance and radius size
Radius of measurement
Distance Aperture angle
field
(mm) (degree)
(mm)
2 10
1 5
0,2 1
0,1 0,5
Standard setup conditions are given below. Any deviations from these conditions shall be
recorded.
5.3.2 Adjustment of OLED display modules
The adjustment of the OLED display modules specified in IEC 62341-6-1:20092017, 5.3.12,
shall be applied.
5.3.3 Starting conditions of measurements
Warm-up time is defined as the time elapsed from the moment of switching on the supply
voltage until repeated measurements of the display show a variation in luminance of less than
2 %/min. Repeated measurements shall be taken for a period of at least 15 min after starting.
The luminance variations shall also not exceed 5 % during the total measurement.
5.3.4 Test patterns
The test patterns for display devices such as mobile phones, table PCs, monitors and TVs are
shown in Figure 2. In the case of mobiles and tablet PCs, depending on the size of the OLED
display panels or modules and measurement distance between the display and the LMD, if the
pattern size is a smaller area than a 10 mm radius at a 500 mm measurement distance with a
2-degree aperture angle of the LMD, then the aperture angle of the LMD should be set to
cover the pattern area as set in Table 1. The measuring distance and the aperture angle may
be adjusted to achieve a measuring field greater than 500 pixels if the setting of the aperture
angle is difficult. For all applications, the test pattern is used in Figure 2a), and usage method
case for monitors and TVs such as Figure 2b) may be used. In order to get repeatability of
measurement, the measuring location from P to P for TVs type as shown in Figure 2c) are
0 4
set, considering the uniformity of the OLED display panels or modules.

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IEC  2152/13 IEC  2153/13
a) – The test pattern for display b) – The test pattern for monitor
devices except monitors and TV devices
and TVs
IEC  215413
c) – Image sticking measuring location
Figure 2 – Test pattern for image sticking
5.3.4.1 SDR displays
The test patterns for SDR display devices such as mobile phones, tablet PCs, monitors, TVs
and digital signage are shown in Figure 2. The test pattern for SDR displays is divided into
two groups.
1) Test pattern for mobiles and tablet PC displays
In the case of mobiles and tablet PCs, the measurement distance between the display and the
LMD depends on the size of the OLED display panels or modules. The measuring distance
and the aperture angle may be adjusted to achieve a measuring field greater than 500 pixels
if the setting of the measurement field angle is not applied. For display devices except
monitors, TVs and digital signage, the test pattern with a white level at the 4 % window box
located in the centre and a black level in the background, is used in Figure 2a).
2) Test pattern for monitors, TVs and digital signage displays
For monitors, TVs and digital signage, the test pattern is extracted by video analysis to reflect
the characteristics of the video sample. For the test pattern, the maximum code value is
allocated at the 4 % window box in the centre and the average code value is in the
background. The examples of the maximum and average gray code values are shown in
Table 1. The example of the test pattern is shown in Figure 2b). The maximum and average
code values between 0 and 255 (in the case of 8 bits) could be extracted from the
accumulating image for all frames of the video sample, which is converted as equivalent
grayscale from each colour channel.
NOTE 1 Image sticking is influenced by the characteristics of the OLED displays [5], [7]. Some manufacturers of
OLED displays apply various algorithms to optimize the quality of each device, and this also influences the image

sticking. To consider the characteristics of an OLED display, the method in Annex A is used for the test pattern
reflecting the characteristics of the OLED display.

a) Test pattern for mobiles b) Test pattern for monitors, TVs
and tablet PC displays and digital signage displays
Figure 2 – Test pattern for SDR displays
Table 1 – Examples of maximum and average code value extracted from video samples
Examples of test video Maximum code value Average code value
IEC 62087:2011 107 84
Broadcast video sample 183 102

NOTE 2 For the test pattern, any video samples could be selected as needed. Table 1 shows two kinds of
representative examples. The broadcast video sample example is constructed by considering the viewing ratio of
the content of TV programmes based on the Korea broadcast media use environmental survey report:
entertainment (30,9%), news (20,2 %), drama (16,8 %), and so on [4]. The average gray level and test pattern size
are different between SDR and HDR in TVs. Depending on the purpose of the test, Figure 2b) or Figure 4a) would
apply.
3) Measuring area
In order to get repeatability of measurement, the measuring area from P to P for displays is
0 4
set to consider the uniformity of the OLED display panels or modules, as shown in Figure 3. If
the centre window size is changed, then it should be reported in Table 2.

Figure 3 – Image sticking measuring area
4) Checking the test pattern
For SDR displays, the output luminance can be different although they have the same digital
code value inputs. To check the brief information of the selected test pattern, the output
luminance for the test pattern should be measured and reported.

– 12 – IEC 62341-5-3:2019 RLV © IEC 2019
Apply the test pattern on OLED displays and measure the output luminance on the measuring
area from P to P as shown in Figure 3. The results of the output luminance of the test
0 4
pattern should be reported in Table 2.
5.3.4.2 HDR displays
In 5.3.4.1, the test pattern for SDR displays is described. The test pattern for HDR displays is
shown in Figure 4a). It is based on the PQ curve and 10 bits. The test pattern for HDR
displays is proposed separately because the characteristics of the contents of the SDR and
HDR are different. The test pattern for SDR or HDR can be used as needed. The background
code value should be 510. The size of the box window should be 10 %, which is located in the
centre. The code value of the 10 % box window should be 710. The measured luminance of
the box window and the background luminance should be reported. To get repeatability of the
measurement data, the measuring area from P to P is the centre of the boxes, as shown in
0 4
Figure 4b). The measurement data should be reported in Table 2.

a) HDR test pattern b) Measurement area
Figure 4 – Test pattern for HDR displays
NOTE The code value of the 10 % box window and background is the result of the analysed data of HDR contents
which are HDR games, drama and documentary.
5.3.5 Conditions of measuring equipment
The general conditions in IEC 62341-6-1:20092017, Clause 5, shall be applied.
6 Measuring methods of image sticking
6.1 Purpose
The purpose of this method is to measure the image sticking of an OLED display panels or
modules.
6.2 Measuring method
6.2.1 Measuring equipment
The following equipment defined in IEC 62341-6-1:20092017, 6.1.2 5.3.4, shall be used:
a) power supplies and signal sources for driving,
b) LMD.
6.2.2 Measuring procedure
The OLED display modules shall be set in darkroom conditions for measurement.
a) Initial measurements on full screen pattern
Apply a full white screen driving signal to the OLED display modules over the full screen, and
set all power supplies to the standard operation conditions. However, for some display
applications, the full screen luminance can be reduced, according to 7.3.1 of IEC 62341-6-
1:2009.
Measure the initial spectral radiance or tristimulus values of white at P to P as shown in
0 4
Figure 2c) 3. The initial spectra radiance or tristrimulus values of the primary colours may also
be measured individually.
b) Image burn-in stress using the test pattern
For the test pattern for display devices (except monitors and TVs), set the test input signal
to the OLED display modules to generate a 0 % luminance level over the full screen and a
peak luminance at the test pattern which is located at the centre of the display as shown in
Figure 2a). For monitor and TV, set the peak luminance level over the 4 % window pattern
located in the centre of the display with a 15 % luminance level of the peak luminance
over the background area. For information about guidance, see Annex C of
IEC 62087:2011. If the other pattern is used, it should be based on Annex A of this
document and reported.
For image stress, the test pattern based on 5.3.4 for display devices should be applied to the
OLED display.
Keep the test pattern until the specified time, considering the luminance degradation curve.
For example, the measurement time can be every 1 h during the first 6 h, and every 24 h
during the first 120 h, then every 72 h until the target time in the standard measurement
condition. Alternatively keep the test pattern until the target time in the standard measurement
condition.
c) Measurements on full screen pattern after image stress
Before the measurement, turn off the OLED display and stabilize it to the standard operation
condition. Then turn on the OLED display again and apply a full white screen driving signal to
the OLED display modules over the full screen. Set all power supplies also to the standard
operation conditions. Measure the spectral radiance or the tristimulus values at the same
measuring location as the initial measurement. The initial and final spectra radiance or
tristrimulus values of the individual primary colours may also be measured and reported.
For the measurement method, only white tone is considered. For the other primary colours
such as red, green and blue, each test pattern should be designed following the methods of
5.3.4, and each full primary colour screen pattern should be used for measurement.
All measurements shall be done at the target time of 400 and 500 h and shall be reported. In
Figure 3 5, an example of the burn-in image stress is shown.

– 14 – IEC 62341-5-3:2019 RLV © IEC 2019

IEC  2155/13
Figure 3 – An example of the burn-in image

Figure 5 – Example of the resulting image after image stress
6.3 Analysis and report
6.3.1 Analysis
6.3.1.1 Luminance and chromatic deviation method
Image sticking can be characterized by luminance and chromatic deviation.
The image sticking of luminance IS(t) for white is calculated as follows:
{ Lt()}/L ()t
∑ i 0
i=1
(1)
IS()t =1−×100 (%)
{ Lt()}/L ()t
∑
i 0 00
i=1
where
t is the specified measurement time;
t is the initial measurement time;
L is the luminance of the measurement location from P .
i i
Chromatic deviation Δu’v’(t) caused by image sticking at P over time for white is calculated
0 0
as follows:
∆u 'vt'( ) {u '(t)− u '(t )}+−{vt'( ) vt'( )} (2)
00 0
where
=
t is the specified measurement time;
t is the initial measurement time;
(u’(t), v’(t)) is the white chromaticity value at the specified time;
(u’(t ), v’(t )) is the white chromaticity value at the initial time.
0 0
The average of the chromatic deviation Δu’v’(t) caused by image sticking between
AVG
different measuring locations from P to P for white is calculated as follows:
1 4
∆uv' '()t ( {u ' ()t− u ' ()t }+−{v ' ()t v ' ()t } ) / 4 (3)
AVG ∑ ii0 0
i=1
where
t is the specified measurement time;
(u’ (t), v’ (t)) are the chromaticity coordinates of the measuring locations of P (i = 1, 2, 3, 4).
i i i
The value of u' and v' can be calculated from the tristimulus value X, Y, and Z using the
following formula:
u ' 4XX/(++15Y 3Z)
(4)
v ' 9YX/(++15Y 3Z)
6.3.1.2 Colour difference method
6.3.1.2.1 General
The image sticking shall be analyzed with ∆E* of the three-dimensional, CIE 1976 L*a*b*
ab
colour space (see CIE 15-2004) following the procedure in 6.2.2. Additional three-dimensional
uniform colour spaces and colour spaces may also be used and identified in the test report.
Each colour point can be plotted on the L*, a*, and b* axes of the CIE L*a*b* colour space by
referencing the peak white tristimulus value (X , Y , Z ) in the measuring location P at the
n n n 0
initial time t and using the following transformation formula:
L* ()t=116×−f (Y ()t / Y ) 16
i in
a* ()t=500×−[ f (X ()t / X ) f (Y ()t / Y )] (5)
i i n in
b* ()t=200×−[ f (Y ()t / Y ) f (Z ()t / Z )]
i in i n
where
1/3 3

xx > (/6 29)

fx() =

1 29 4
() x + otherwise

3 6 29

t is the specified measurement time;
L*a*b* L* a* b* is the CIELAB colour coordinates of the measuring locations of P
i i i I i
(i = 0, 1, 2, 3, 4);
(X , Y , Z ) is the tristimulus value of the reference white in the measuring location P at
n n n 0
the initial time t .
6.3.1.2.2 CIE 1976
The colour difference formula ΔE* (t) caused by image sticking at P over time for white is
ab 0 0
calculated as follows:
=
=
=
– 16 – IEC 62341-5-3:2019 RLV © IEC 2019
2 22
(6)
∆E * (t) {L* (t)− L* (t )}+{a* (t)− a* (t )}+−{bt* ( ) bt* ( )}
ab 0 0 0 0 0 00 0 00
where
t is the specified measurement time;
t is the initial measurement time;
L*a*b* L* a* b* are the CIELAB colour coordinates of the measuring locations of P .
0 0 0 0 0
The average of the colour difference formula ΔE* (t) caused by image sticking between
ab AVG
different measuring locations from P to P for white is calculated as follows:
1 4

2 22
(7)
∆E * ()t {L* ()t− L* (t )}+{a * ()t− a * (t )}+{b* ()tb− * (t )} / 4
∑
ab AVG i 0 0 ii00 0 0
i=1
where
t is the specified measurement time;
L*a*b* L* a* b* are the chromaticity coordinates of the measuring locations of P (i = 1,
i  i i i i
2, 3, 4).
6.3.2 Report
6.3.2.1 General
The typical value of image sticking can be reported with specified time, as shown in Table 2.
If other primary colours are used such as red, green and blue, it should be reported.
Table 2 – An example of typical value
Measurement data
time
P Average of P ~ P
Colour
0 1 4
(hour)
X Y Z X Y Z
0 White
1 White
6.3.2.2 Image sticking time
The estimated time of image sticking can be reported with the result of the comparison
between the reference luminance ratio, the chromatic deviation, and the colour difference, as
shown in Table 3.
Table 3 – An example of the image sticking time with reference
Factor Threshold Estimated time
Luminance ratio (IS) 3 %
Chromatic deviation ∆u’v’(t) at P
0 0
0,004
Average of chromatic deviation ∆u’v’(t)
AVG
Colour difference ∆E* (t) at P
ab 0 0
Average of colour difference ∆E* (t)
ab AVG
=
=
…
6.3.2.3 Image sticking data
The image sticking can be reported after target time, as shown in Table 4.
Table 4 – An example of the image sticking data at target time
Time
Factor Result data
(hours)
Luminance ratio (IS)
Chromatic deviation ∆u’v’(t) at P
0 0
Average of chromatic deviation ∆u’v’(t)
AVG
Colour difference ∆E* (t) at P
ab 0 0
Average of colour difference ∆E* (t)
ab AVG
6.3.2.1 Information of test pattern
Before reporting the measurement data, information on the used test pattern should be
reported, as shown in Table 2. It includes the type of test pattern, the size of the window box,
the allocated code values located at the centre and background, and the output luminance of
OLED displays for the test pattern. If other test patterns not listed in 5.3.4 are used, they
should be reported in accordance with Table 2.
Table 2 – Information on test pattern
Types of test pattern (SDR, HDR, etc.)
Size of window box - %
Centre – (based on 8 or 10 bits)
Code value
Background – (based on 8 or 10 bits)
Centre (P )
Output
luminance
Background (average of from P to P )
1 4
6.3.2.2 Measurement data record
The typical value of image sticking can be reported following the format shown in Table 3. For
the typical value, the initial data should be reported and other data at the specified time can
be selected following the measuring procedure of image stress.
Table 3 – Example of typical value
Measurement data
Time
Colour P Average of P to P
0 1 4
(hour)
X Y Z X Y Z
0 White
1 White
White
6.3.2.3 Image sticking data
Image sticking should be reported with the result of the comparison between the reference
luminance ratio, the chromatic deviation, and the colour difference, following the format
shown in Table 4. Each result data should be calculated from Formulae (1) to (7), and should

– 18 – IEC 62341-5-3:2019 RLV © IEC 2019
be reported in Table 4. The designated time is 500 h. If the time is changed, it should be
reported.
Table 4 – Reporting format of the image sticking data at target time
Time
Factor Result data
(hours)
Luminance ratio (IS)
Chromatic deviation Δu’v’(t) at P
0 0
Average of chromatic deviation Δu’v’(t)
AVG
Colour difference ΔE* (t) at P
ab 0 0
Average of colour difference ΔE* (t)
ab AVG
It is recommended to refer to ΔE* using the method in Annex B, if it is necessary to
calculate the colour difference with CIEDE2000 instead of ΔE* .
ab
6.3.2.4 Image sticking time
Image sticking can also be reported as the estimated time with the thresholds as shown in
Table 5. The thresholds of the image sticking can be set depending on the display size, peak
luminance and so on. They can be selected as needed and should be reported.
Table 5 – Reporting format of the image sticking time with threshold
Factor Threshold Estimated time
Luminance ratio (IS) -
Chromatic deviation Δu’v’(t) at P
0 0
-
Average of chromatic deviation Δu’v’(t)
AVG
Colour difference ΔE* (t ) at P
ab 0 0
-
Average of colour difference ΔE* (t)
ab AVG
It is recommended to refer to ΔE* using the method in Annex B, if it is necessary to
calculate colour difference with CIEDE2000 instead of ΔE* .
ab
7 Measuring methods of the luminance lifetime
7.1 Purpose
The purpose of this met
...