3D display devices - Part 22-1: Measuring methods for autostereoscopic displays - Optical

IEC 62629-22-1:2013 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.

3D-Anzeigen - Teil 22-1: Messverfahren für auto-stereoskopische Anzeigen - Optisch

Dispositifs d'affichage 3D - Partie 22-1 : Méthodes de mesure des écrans autostéréoscopiques - Optique

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
16-May-2013
Current Stage
6060 - Document made available
Due Date
13-Jun-2013
Completion Date
17-May-2013

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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
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
– 2 – 62629-22-1 © IEC:2013
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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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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SIST EN 62629-22-1:2013
– 6 – 62629-22-1 © IEC:2013

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.

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
—————————
To be published.
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SIST EN 62629-22-1:2013
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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
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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SIST EN 62629-22-1:2013
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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
...

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