SIST EN 62629-22-1:2013

3D Display Devices - Part 22-1: Measuring methods for Autostereoscopic displays - Optical

This part of IEC 62629-22 specifies optical measuring methods for autostereoscopic display devices. It defines general measuring procedures for optical characteristics of two-view and multi-view displays and integral imaging displays.

/

/

La CEI 62629-22-1:2013 spécifie les méthodes de mesure optique des dispositifs d'affichage autostéréoscopiques. Elle définit les procédures générales de mesure des caractéristiques optiques des écrans à deux fenêtres, multifenêtre et d'imagerie intégrale.

3D-prikazovalniki - 22-1. del: Merilne metode za avtostereoskopske prikazovalnike - Optično

Ta del IEC 62629-22 določa metode optičnega merjenja za autostereoskopske naprave za prikaz. Določa splošne merilne postopke za optične karakteristike zaslonov z dvema in več prikazi ter integralne prikazne zaslone.

General Information

• Status: Published
• Publication Date: 28-May-2013
• ICS: 33.160.99 - Other audio, video and audiovisual equipment
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 28-May-2013
• Due Date: 02-Aug-2013
• Completion Date: 29-May-2013
• Ref Project: EN 62629-22-1:2013 - 3D display devices - Part 22-1: Measuring methods for autostereoscopic displays - Optical

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 62629-22-1:2013
01-julij-2013
'SULND]RYDOQLNLGHO0HULOQHPHWRGH]DDYWRVWHUHRVNRSVNHSULND]RYDOQLNH
2SWLþQR
3D Display Devices - Part 22-1: Measuring methods for Autostereoscopic displays -
Optical
/
/
Ta slovenski standard je istoveten z: EN 62629-22-1:2013
ICS:
33.160.99 Druga avdio, video in Other audio, video and
avdiovizuelna oprema audiovisual equipment
SIST EN 62629-22-1:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62629-22-1:2013

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SIST EN 62629-22-1:2013

EUROPEAN STANDARD
EN 62629-22-1

NORME EUROPÉENNE
May 2013
EUROPÄISCHE NORM

ICS 31.120; 31.260


English version


3D display devices -
Part 22-1: Measuring methods for autostereoscopic displays -
Optical
(IEC 62629-22-1:2013)


Dispositifs d'affichage 3D -  3D-Anzeigen -
Partie 22-1 : Méthodes de mesure des Teil 22-1: Messverfahren für auto-
écrans autostéréoscopiques - stereoskopische Anzeigen -
Optique Optisch
(CEI 62629-22-1:2013) (IEC 62629-22-1:2013)





This European Standard was approved by CENELEC on 2013-03-13. 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, Former Yugoslav Republic of Macedonia, 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


© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62629-22-1:2013 E

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SIST EN 62629-22-1:2013
EN 62629-22-1:2013 - 2 -
Foreword
The text of document 110/428/FDIS, future edition 1 of IEC 62629-22-1, prepared by IEC/TC 110
"Electronic display devices" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 62629-22-1:2013.
The following dates are fixed:
(dop) 2013-12-13
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-03-13
• latest date by which the national
standards conflicting with the
document have to be withdrawn

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 62629-22-1:2013 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 61747-6:2004 NOTE Harmonised as EN 61747-6:2004 (not modified).
IEC 62341-6-1:2009 NOTE Harmonised as EN 62341-6-1:2011 (not modified).
ISO 9241-302:2008 NOTE Harmonised as EN ISO 9241-302:2008 (not modified).
ISO 9241-305:2008 NOTE Harmonised as EN ISO 9241-305:2008 (not modified).
ISO 9241-306:2008 NOTE Harmonised as EN ISO 9241-306:2008 (not modified).

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SIST EN 62629-22-1:2013
- 3 - EN 62629-22-1:2013
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

1) 1)
IEC 62629-1-2 - 3D Display devices - EN 62629-1-2 -
Part 1-2: Generic - Terminology and letter
symbols


CIE 15 2004 Colorimetry - -


CIE 69 1987 Methods of characterizing illuminance - -
meters and luminance meters




1)
At draft stage.

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SIST EN 62629-22-1:2013

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SIST EN 62629-22-1:2013



IEC 62629-22-1

®


Edition 1.0 2013-02




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











3D display devices –

Part 22-1: Measuring methods for autostereoscopic displays – Optical




Dispositifs d'affichage 3D –

Partie 22-1: Méthodes de mesure des écrans autostéréoscopiques – Optique
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX V


ICS 31.120; 31.260 ISBN 978-2-83220-614-0



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 62629-22-1:2013
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CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 7
4 Standard measuring conditions . 8
4.1 Standard environmental conditions . 8
4.1.1 Temperature, humidity and pressure conditions . 8
4.1.2 Illumination conditions . 8
4.2 Light measuring device . 8
4.2.1 General . 8
4.2.2 Aperture size . 9
4.3 Measuring setup . 9
4.3.1 Designed viewing distance . 9
4.3.2 Measurement area . 10
4.3.3 Measuring layout . 10
4.4 Test signal . 12
4.5 Standard measuring points . 13
5 Measuring method for two-view/multi-view displays . 14
5.1 Maximum luminance direction . 14
5.1.1 General . 14
5.1.2 Measuring equipment . 14
5.1.3 Measuring conditions . 15
5.1.4 Measuring procedure . 15
5.1.5 Measurement report . 15
5.2 Lobe angle and lobe angle variation on screen . 16
5.2.1 General . 16
5.2.2 Measuring equipment . 16
5.2.3 Measuring conditions . 16
5.2.4 Measuring procedure . 16
5.2.5 Measurement report . 16
5.3 Luminance, screen luminance uniformity, and angular luminance variation . 17
5.3.1 Luminance and screen luminance uniformity . 17
5.3.2 Angular luminance variation . 19
5.4 White chromaticity, white chromaticity uniformity on screen, and white
chromaticity variation in angle . 20
5.4.1 White chromaticity and white chromaticity uniformity on screen . 20
5.4.2 White chromaticity angular variation . 21
5.5 3D crosstalk (luminance components ratio), 3D crosstalk variation on screen,
and 3D crosstalk variation in angle . 23
5.5.1 3D crosstalk (luminance components ratio) and 3D crosstalk variation
on screen . 23
5.5.2 3D crosstalk angular variation. 25
6 Standard measuring method for integral imaging displays (1-D/2-D) . 26
6.1 General . 26
6.2 Lobe angle and lobe angle variation on screen . 27

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SIST EN 62629-22-1:2013
62629-22-1 © IEC:2013 – 3 –
6.3 Luminance, screen luminance uniformity, and angular luminance variation . 27
6.3.1 Luminance and screen luminance uniformity . 27
6.3.2 Angular luminance variation . 27
6.4 White chromaticity, white chromaticity uniformity on screen, and white
chromaticity variation in angle . 27
6.4.1 White chromaticity and white chromaticity uniformity on screen . 27
6.4.2 White chromaticity variation in angle. 27
Annex A (informative) Principle of autostereoscopic display . 28
Annex B (informative) Angular profile of luminance . 32
Bibliography . 33

Figure 1 – Measuring system . 9
Figure 2 – Measuring layout for centre point measurement . 10
Figure 3 – Measuring layout for multi-point measurement (side view). 11
Figure 4 – Other measuring layout for multi-point measurement (side view) . 11
Figure 5 – Measuring layout for horizontal viewing direction dependency . 12
Figure 6 – Measuring layout for vertical viewing direction dependency . 12
Figure 7 – Two examples of the relation between pixel and lenslet in multi-view display
(number of views is N) . 13
Figure 8 – Measuring points for the centre and multi-point measurement . 14
Figure 9 – Example of n by m measuring points . 14
Figure 10 – Example of measurement results for angular luminance profile . 15
Figure 11 – Example of lobe angle measurement . 17
Figure 12 – Example of 3D crosstalk variation on screen . 23
Figure 13 – Example of acquired images in multi-view display . 24
Figure 14 – Spatial luminance data acquirement (left) and example of calculated
spatial crosstalk graph (right) . 25
Figure A.1 – Structure of two-view display . 28
Figure A.2 – Basic principle of two-view display . 29
Figure A.3 – Structure of multi-view display . 29
Figure A.4 – Basic principle of multi-view display . 30
Figure A.5 – Basic principle of integral imaging display . 31
Figure B.1 – Example of angular profile of luminance. 32

Table 1 – Example of reported specification of two dimensional LMD . 9
Table 2 – Example of measurement results for maximum luminance direction . 16
Table 3 – Example of measurement results for lobe angle variation on screen . 17
Table 4 – Example of measurement results for luminance and screen luminance non-
uniformity . 18
Table 5 – Example of measurement results for angular luminance variation . 20
Table 6 – Example of measurement results for white chromaticity and white
chromaticity uniformity on screen . 21
Table 7 – Example of measurement results for white chromaticity variation in angle . 23
Table 8 – Example of measurement results for 3D crosstalk variation on screen . 25
Table 9 – Example of measurement results for 3D crosstalk angular variation . 26

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Table B.1 – Example of measurement results . 32

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SIST EN 62629-22-1:2013
62629-22-1 © IEC:2013 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

3D DISPLAY DEVICES –

Part 22-1: Measuring methods for autostereoscopic displays –
Optical


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 62629-22-1 has been prepared by IEC technical committee 110:
Electronic display devices.
The text of this standard is based on the following documents:
FDIS Report on voting
110/428/FDIS 110/455/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 62629 series, under the general title 3D display devices, can be
found on the IEC website.

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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.

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SIST EN 62629-22-1:2013
62629-22-1 © IEC:2013 – 7 –
3D DISPLAY DEVICES –

Part 22-1: Measuring methods for autostereoscopic displays –
Optical



1 Scope
This part of IEC 62629-22 specifies optical measuring methods for autostereoscopic display
devices. It defines general measuring procedures for optical characteristics of two-view and
multi-view displays and integral imaging displays.
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.
1
IEC 62629-1-2, 3D display devices – Part 1-2: Generic – Terminology and letter symbols
CIE 15:2004, Colorimetry, 3rd Edition
CIE 69:1987, Methods of characterizing illuminance meters and luminance meters
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purpose of this document, the terms and definitions given in IEC 62629-1-2 apply.
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
Abbreviation Definition
CCD charge-coupled device
DVD designed viewing distance
FWHM full width half maximum
FWTQM full width at three-quarter maximum
LMD light measuring device

—————————
1
 To be published.

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4 Standard measuring conditions
4.1 Standard environmental conditions
4.1.1 Temperature, humidity and pressure conditions
Standard environmental conditions shall be applied for the measurements of autostereoscopic
display devices.
The standard environmental conditions for the measurements of autostereoscopic display
devices are (25 ± 5) °C temperature, 45 % to 75 % relative humidity, and 86 kPa to 106 kPa
pressure.
4.1.2 Illumination conditions
Standard dark room conditions shall be applied.
In standard dark room conditions, the illuminance at any position on the screen (the display
device screen) is below 0,3 lx in all directions.
NOTE Illuminance is measured without the measured display or in conditions where the display is turned off.
4.2 Light measuring device
4.2.1 General
The LMD used for measurements of the displays shall be checked for the following criteria
and specified accordingly:
• aperture size (window function of LMD) (see 4.2.2);
• sensitivity of the measured quantity;
• errors caused by veiling glare and lens flare (i.e. stray light in optical system);
• timing of data-acquisition, low-pass filtering and aliasing-effects;
• linearity of detection and data-conversion;
• resolution and moiré in the use of two-dimensional LMD.
A point-measurement LMD, such as a spot luminance meter, or a two-dimensional LMD such
as a CCD area detector shall be used for these measurements. A conoscopic type LMD can
be used for some measurements. When using a two-dimensional LMD and/or a conoscopic
type LMD, they shall be calibrated, so that the measurement results correspond to those of
the point-measurement LMD. The specification of the LMD used shall be noted in the report
as in the example shown in Table 1.
NOTE 1 The point-measurement LMD measures the luminance and/or colour coordinate at each measurement
point on the screen. A two-dimensional LMD measures the map of luminance and/or colour coordinate over the
measurement area of the screen. A conoscopic type LMD measures the directional characteristics of luminance
and/or colour coordinate at each measurement point on the screen.
NOTE 2 A point-measurement LMD usually has higher sensitivity than a two-dimensional LMD. A two-dimensional
LMD measures the uniformity of the measuring area more easily than a point-measurement LMD.

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SIST EN 62629-22-1:2013
62629-22-1 © IEC:2013 – 9 –
Table 1 – Example of reported specification of two dimensional LMD
CCD resolution
4 096 × 2 048
CCD A/D dynamic range More than 12 bits = 4 096 gray scale levels
Wavelength range 380 nm to 780 nm
System accuracy Luminance variation ± 3 %
CIE 1931 chromaticity coordinates (x, y)
± 0,003
0
Colorimetric filters CIE 1931 colour matching functions for a 2 observer

4.2.2 Aperture size
The aperture size (entrance pupil, see CIE 69) of an LMD including point measurement and
two-dimensional type LMDs (smaller than the size of the object lens of the LMD) shall be
equal to or smaller than 8 mm. When a larger aperture LMD is used, the measurement results
shall be checked so that the results are equivalent to those of the smaller aperture LMD. The
aperture size shall be reported by the supplier (the manufacturer of the 3D display device) in
the relevant specification.
NOTE In the measurement of autostereoscopic displays, the aperture size of the LMD greatly affects the
measurement results. So the LMD aperture size is defined in this document. The aperture size similar to the size of
the pupil of an eye is ideal for the measurements (e.g. crosstalk), but smaller aperture decreases sensitivity. The
size of 8 mm is small enough for the measurement and large enough for the sensitivity. The exact value of the
aperture size of LMD used will be informed by the LMD supplier. The relation among the aperture size, measuring
area size and measuring distance is shown in Figure 1 and explained in 4.3. When a larger aperture LMD is used,
the measuring distance is increased as long as the measuring distance does not affect the measurement results by
changing the measuring distance.
Measurement area
Aperture area

(measurement field)
(acceptance area)
Angular aperture


Measurement area angle
(measurement field angle)
LMD
Measuring distance
Screen
IEC  219/13

Figure 1 – Measuring system
4.3 Measuring setup
4.3.1 Designed viewing distance
A DVD shall be defined by the supplier in the relevant specification. The DVD is the distance
from which proper stereoscopic views are intended to be observed, and/or the characteristics
of an autostereoscopic display are measured accurately.
For the measurements, the designed viewing distance shall be applied as the measuring
distance. The measuring distance shall be fixed when items planned to be evaluated are

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measured. Only one designed viewing distance shall be defined and applied to an
autostereoscopic display device.
4.3.2 Measurement area
The LMD shall be set at a proper measurement area angle (measurement field angle, see
Figure 1) less than or equal to 2 degrees, and shall have a measurement area of at least
500 pixels whose diameter is less than 10 % of the screen height. This area corresponds to
including a circular measurement area of at least 26 lines in diameter when the screen has a
square pixel consisting of 3 subpixels. If the above conditions cannot be applied, the applied
measurement area shall include as many pixels as possible. The applied measuring
conditions shall be noted in the report.
NOTE Based on the information given by the supplier, such as number of views and lobe angle, the measurement
field angle, aperture angle and measuring distance are determined. The aperture angle is small so that the angular
luminance profile can be measured precisely. In general, the more the number of views increases, the smaller the
required aperture angle is. In theory, when a smaller aperture is applied, a smaller field angle is desirable. In
addition, some autostereoscopic displays are designed so that the screen produces different distribution of light
rays to improve 3D observation. When considering these points, the field angle is introduced. The range of
measuring distance is decided by the size of aperture and measurement field. The measuring distance and the field
angle are adjusted to achieve a viewing area greater than 500 pixels, whose diameter is less than 10 % of the
screen height, if it is difficult to set the field angle above.
4.3.3 Measuring layout
4.3.3.1 Centre point measurement
The measuring layout for a centre point measurement is shown in Figure 2. The aperture of
LMD shall be set at the designed viewing distance.
Screen
Screen
LMD LMD


Screen
centre






Centre line
Measuring distance
Measuring distance
IEC  220/13 IE
...