SIST EN ISO 15008:2017

Road vehicles - Ergonomic aspects of transport information and control systems - Specifications and test procedures for in-vehicle visual presentation (ISO 15008:2017)

This document specifies minimum requirements for the image quality and legibility of displays
containing dynamic (changeable) visual information presented to the driver of a passenger car by onboard
transport information and control systems (TICS) used while the vehicle is in motion. Heavy
vehicles are excluded for the requirements of contrast and font size since these chapters reference
ISO 4513 which is only applicable for passenger vehicles. These requirements are intended to be
independent of display technologies. Reference to test methods and measurements for assessing
compliance with them have been included where necessary.
This document is applicable mainly to perceptual, and some basic cognitive, components of the
visual information, including character legibility and colour recognition. It is not applicable to other
factors affecting performance and comfort, such as coding, format and dialogue characteristics, or to
displays using:
— characters presented as a part of a symbol or pictorial information (e.g.CD symbol);
— superimposed information on the external field (e.g. head-up displays);
— pictorial images (e.g. rear view camera);
— maps and topographic representations (e.g. those for setting navigation systems); or
— quasi-static information (e.g. AM/PM, km/miles, kPa/PSI, On/Off information).

Straßenfahrzeuge - Ergonomische Aspekte von Fahrerinformations- und Assistenzsystemen - Anforderungen und Bewertungsmethoden der visuellen Informationsdarstellung im Fahrzeug (ISO 15008:2017)

Diese Internationale Norm legt Mindestanforderungen an die Bildqualität und Lesbarkeit von Anzeigen, für die Darstellung von dynamischen (sich ändernden) visuellen Informationen fest, die dem Fahrer eines Personenkraftfahrzeuges von einem internen Fahrerinformations- und Assistenzsystem (en: Transport Information and Control System, TICS) während der Fahrt bereitgestellt werden. Schwerlastfahrzeuge sind von diesen Anforderungen an Kontraste und Schriftgrößen ausgeschlossen, da diese Kapitel ISO 4513 referenzieren, die nur für Personenkraftfahrzeuge angewendet wird. Diese Anforderungen sollen unabhängig von speziellen Anzeige-Technologien gelten. Verweisungen auf Test- und Messmethoden sind dort eingefügt worden, wo sie zur Überprüfung und Einhaltung der Anforderungen notwendig sind.
Diese Norm betrifft hauptsächlich Wahrnehmungskomponenten und einige grundlegende kognitive Komponenten der visuellen Information; diese schließen Lesbarkeit von Zeichen und Farberkennung ein. Sie ist nicht anwendbar auf andere Faktoren, welche die Wahrnehmungsleistung und den Komfort beeinflussen, wie z. B. Kodierung, Format und Dialog-Formen, oder auf Anzeigesysteme, die
   Zeichen verwenden, die Teil eines Symbols oder einer bildhaften Information sind (z. B. CD-Symbol),
   dem externen Sichtfeld überlagerte Informationen enthalten (z. B. Head-up Displays),
   bildhafte Informationen darstellen (z. B. Rückfahrkamera),
   Karten und topographische Darstellungen anzeigen (z. B. für Einstellmöglichkeiten von Navigationssystemen), oder
   quasi-statische Informationen anzeigen (z. B. AM/PM, km/Meilen, kPa/PSI, An/Aus-Informationen).

Véhicules routiers - Aspects ergonomiques des systèmes de commande et d'information des transports - Spécifications et modes opératoires pour la présentation visuelle à bord du véhicule (ISO 15008:2017)

L'ISO 15008 :2017 spécifie les exigences minimales de qualité d'image et de lisibilité d'image des afficheurs qui fournissent au conducteur d'une voiture particulière des informations visuelles dynamiques (changeantes) issues des systèmes de commande et d'information des transports (TICS) embarqués utilisables pendant que le véhicule est en mouvement. Les véhicules lourds sont exclus pour les exigences de contraste et de taille de police de caractères, car ces paragraphes font référence à la norme ISO 4513 qui ne s'applique qu'aux voitures particulières. Ces exigences sont indépendantes des technologies d'affichage utilisées, alors que les méthodes d'essai et les mesures qui permettent d'évaluer la conformité aux spécifications sont indiquées si nécessaire.
L'ISO 15008 :2017 est applicable principalement aux composantes perceptives et à certaines composantes cognitives fondamentales de l'information visuelle, y compris la lisibilité des caractères et la reconnaissance des couleurs. Elle n'est pas applicable à d'autres facteurs affectant les performances et le confort, tels que le codage, le format et les caractéristiques du dialogue, ni aux afficheurs utilisant:
-      des caractères présentés comme une partie d'un symbole ou d'information graphique (par exemple symbole CD),
-      des informations superposées à la scène extérieure au véhicule (par exemple affichages tête haute),
-      des images graphiques (par exemple d'une caméra de vue arrière),
-      des cartes et des représentations topographiques (par exemple celles pour régler les systèmes de navigation), ou
-      des informations quasi statiques (par exemple a.m./p.m., km/miles, kPa/psi, information On/Off).

Cestna vozila - Ergonomski vidiki transportnih informacij in kontrolnih sistemov - Specifikacije in postopki preskušanja vizualne predstavitve v vozilu (ISO 15008:2017)

Ta dokument določa minimalne zahteve za kakovost slike in berljivost zaslonov, ki vsebujejo dinamične (spremenljive) vizualne informacije, ki jih vozniku potniškega vozila prikazujejo
transportne informacije in kontrolni sistemi v vozilu (TICS), ki se uporabljajo, ko se vozilo premika. Zahteve glede kontrasta in velikosti pisave ne veljajo za težka vozila, ker se ta poglavja sklicujejo na standard ISO 4513, ki se uporablja le za potniška vozila. Te zahteve niso odvisne od tehnologij za prikaz. Po potrebi so bili vključeni sklici na preskusne metode in meritve za ocenjevanje skladnosti z njimi.
Ta dokument se uporablja predvsem za zaznavne in nekatere osnovne kognitivne komponente vizualnih informacij, vključno z berljivostjo znakov in prepoznavanjem barv. Ne uporablja se za druge dejavnike, ki vplivajo na zmogljivost in udobje, kot so kodiranje, oblika in značilnosti zapisa, ali za zaslone, ki uporabljajo:
– znake, ki so predstavljeni kot del simbola ali slikovne informacije (npr. simbol za CD);
– informacije, prikazane na zunanjem polju (npr. zasloni v višini oči);
– slike (npr. kamera za vzvratno vožnjo);
– zemljevidi in topografske predstavitve (npr. za nastavitev navigacijskih sistemov); ali
- navidezno statične informacije (npr. AM/PM, km/milje, kPa/PSI, informacije o vklopu/izklopu).

General Information

• Status: Published
• Public Enquiry End Date: 21-Apr-2016
• Publication Date: 11-Sep-2017
• ICS: 13.180 - Ergonomics
• ICS: 43.040.15 - Car informatics. On board computer systems
• Technical Committee: ITC - Information technology
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Apr-2017
• Due Date: 11-Jun-2017
• Completion Date: 12-Sep-2017
• Ref Project: EN ISO 15008:2017 - Road vehicles - Ergonomic aspects of transport information and control systems - Specifications and test procedures for in-vehicle visual presentation (ISO 15008:2017)

Relations

• Replaces: SIST EN ISO 15008:2009 - Road vehicles - Ergonomic aspects of transport information and control systems - Specifications and test procedures for invehicle visual presentation (ISO 15008:2009)
• Effective Date: 22-Mar-2017

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 15008:2017
01-oktober-2017
1DGRPHãþD
SIST EN ISO 15008:2009
Cestna vozila - Ergonomski vidiki transportnih informacij in kontrolnih sistemov -
Specifikacije in postopki preskušanja vizualne predstavitve v vozilu (ISO
15008:2017)
Road vehicles - Ergonomic aspects of transport information and control systems -
Specifications and test procedures for in-vehicle visual presentation (ISO 15008:2017)
Straßenfahrzeuge - Ergonomische Aspekte von Fahrerinformations- und
Assistenzsystemen - Anforderungen und Bewertungsmethoden der visuellen
Informationsdarstellung im Fahrzeug (ISO 15008:2017)
Véhicules routiers - Aspects ergonomiques des systèmes de commande et d'information
des transports - Spécifications et modes opératoires pour la présentation visuelle à bord
du véhicule (ISO 15008:2017)
Ta slovenski standard je istoveten z: EN ISO 15008:2017
ICS:
13.180 Ergonomija Ergonomics
43.040.15 $YWRPRELOVNDLQIRUPDWLND Car informatics. On board
9JUDMHQLUDþXQDOQLãNLVLVWHPL computer systems
SIST EN ISO 15008:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 15008:2017

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SIST EN ISO 15008:2017


EN ISO 15008
EUROPEAN STANDARD

NORME EUROPÉENNE

March 2017
EUROPÄISCHE NORM
ICS 13.180; 43.040.15 Supersedes EN ISO 15008:2009
English Version

Road vehicles - Ergonomic aspects of transport
information and control systems - Specifications and test
procedures for in-vehicle visual presentation (ISO
15008:2017)
Véhicules routiers - Aspects ergonomiques des Straßenfahrzeuge - Ergonomische Aspekte von
systèmes de commande et d'information des Fahrerinformations- und Assistenzsystemen -
transports - Spécifications et modes opératoires pour Anforderungen und Bewertungsmethoden der
la présentation visuelle à bord du véhicule (ISO visuellen Informationsdarstellung im Fahrzeug (ISO
15008:2017) 15008:2017)
This European Standard was approved by CEN on 25 February 2017.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

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





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15008:2017 E
worldwide for CEN national Members.

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SIST EN ISO 15008:2017
EN ISO 15008:2017 (E)
Contents Page
European foreword . 3
2

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SIST EN ISO 15008:2017
EN ISO 15008:2017 (E)
European foreword
This document (EN ISO 15008:2017) has been prepared by Technical Committee ISO/TC 22 “Road
vehicles” in collaboration with Technical Committee CEN/TC 278 “Intelligent transport systems” the
secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2017, and conflicting national standards
shall be withdrawn at the latest by September 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 15008:2009.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 15008:2017 has been approved by CEN as EN ISO 15008:2017 without any modification.

3

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SIST EN ISO 15008:2017

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SIST EN ISO 15008:2017
INTERNATIONAL ISO
STANDARD 15008
Third edition
2017-02
Road vehicles — Ergonomic aspects
of transport information and control
systems — Specifications and test
procedures for in-vehicle visual
presentation
Véhicules routiers — Aspects ergonomiques des systèmes de
commande et d’information des transports — Spécifications et modes
opératoires pour la présentation visuelle à bord du véhicule
Reference number
ISO 15008:2017(E)
©
ISO 2017

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SIST EN ISO 15008:2017
ISO 15008:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

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SIST EN ISO 15008:2017
ISO 15008:2017(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements and measurement methods . 4
4.1 General . 4
4.2 Design viewing position and illumination range . 5
4.2.1 Design viewing position . 5
4.2.2 Illumination range . 7
4.3 Display illumination, minimum contrast, luminance and polarity . 7
4.3.1 Display illumination . 7
4.3.2 Minimum contrast ratio . 7
4.3.3 Display mode .10
4.4 Colour combinations .10
4.5 Alphanumerical character dimensions .11
4.5.1 General.11
4.5.2 Height .11
4.5.3 Width by height ratio: Proportion of the typeface .11
4.5.4 Stroke width by height ratio: Weight of the typeface .12
4.5.5 Spacing .12
4.5.6 Case .13
4.6 Pixel matrix character format .14
4.6.1 Upper and lower case of alphanumeric Latin, Greek, Cyrillic characters .14
4.6.2 Automotive symbols .15
4.6.3 Non-Latin characters . .16
4.7 Reflections and glare .16
4.8 Characteristics of presentation .16
4.8.1 Image instability.16
4.8.2 Image flashing .16
4.9 Redundant information displays .17
Annex A (normative) Definition and measurement of character dimensions .18
Annex B (informative) Colour combinations .20
Annex C (informative) Terminology of typographic terms and visual dictionary .21
Bibliography .25
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SIST EN ISO 15008:2017
ISO 15008:2017(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www . i so .org/ iso/ foreword .html.
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 39,
Ergonomics.
This third edition cancels and replaces the second edition (ISO 15008:2009), which has been technically
revised with the following changes:
— Introduction was modified;
— Scope was modified (heavy vehicles partly excluded);
— test conditions for direct sunlight have been changed;
— character height was modified;
— character proportion was modified;
— character weight criterion was modified;
— intercharacter spacing was modified;
— word spacing was modified;
— a new subclause on text case was added;
— the subclause on character outlines was modified;
— a new subclause on character shadows was added;
— the subclause on Non-Roman text was modified and renamed Non-Latin.
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SIST EN ISO 15008:2017
ISO 15008:2017(E)

Introduction
Driving is a complex task requiring continuous allocation of attentional resources to both driving
and non-driving tasks. Because of this, driving is an interactive balance between cognitive, physical,
somatosensory, visual and psychomotor skills.
Driver and vehicle form an integrated system that includes the environment, vehicle controls, and
displays collectively defined as the transport information and control systems (TICS). Since driving
is an interactive systems activity, vehicle characteristics in combination with human capabilities
constitute important factors in the performance of this TIC system.
In order to achieve optimal driver performance, the purpose of TICS is to support drivers in their
primary task such that performance, comfort and safety are increased and overall driver workload is
not negatively influenced by the use of TICS. One set of factors influencing this process involves the
characteristics of visual displays. Specifically, those aspects of displays designed to accommodate
human capabilities, the range of illumination conditions and location of the display with respect
to the driver. This is especially important since visual specifications must include a wide range of
environmental conditions and constitute only one necessary condition for adequate performance,
comfort and workload. The purpose of this document is to standardize visual presentation.
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SIST EN ISO 15008:2017
INTERNATIONAL STANDARD ISO 15008:2017(E)
Road vehicles — Ergonomic aspects of transport
information and control systems — Specifications and test
procedures for in-vehicle visual presentation
1 Scope
This document specifies minimum requirements for the image quality and legibility of displays
containing dynamic (changeable) visual information presented to the driver of a passenger car by on-
board transport information and control systems (TICS) used while the vehicle is in motion. Heavy
vehicles are excluded for the requirements of contrast and font size since these chapters reference
ISO 4513 which is only applicable for passenger vehicles. These requirements are intended to be
independent of display technologies. Reference to test methods and measurements for assessing
compliance with them have been included where necessary.
This document is applicable mainly to perceptual, and some basic cognitive, components of the
visual information, including character legibility and colour recognition. It is not applicable to other
factors affecting performance and comfort, such as coding, format and dialogue characteristics, or to
displays using:
— characters presented as a part of a symbol or pictorial information (e.g.CD symbol);
— superimposed information on the external field (e.g. head-up displays);
— pictorial images (e.g. rear view camera);
— maps and topographic representations (e.g. those for setting navigation systems); or
— quasi-static information (e.g. AM/PM, km/miles, kPa/PSI, On/Off information).
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.
ISO 4513, Road vehicles — Visibility — Method for establishment of eyellipses for driver’s eye location
CIE 85:1989, Solar spectral irradiance
SAE J1757/1:2015, Standard Metrology for Vehicular Displays
CIE S 017/E:2011 ILV, International lighting vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in CIE S 017/E:2011 ILV 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
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SIST EN ISO 15008:2017
ISO 15008:2017(E)

3.1
adaptation
adjustment of the eye’s sensitivity to the brightness (3.2) of the observed visual field by chemical and
physical processes within the eye
Note 1 to entry: Dark adaptation occurs at a slower rate than does light adaptation.
3.2
brightness
subjective attribute of light sensation by which a stimulus appears to be more or less intense or to emit
more or less light
3.3
chromatic
having hue or being coloured, appearing different in quality from a neutral grey having the same
brightness (3.2)
Note 1 to entry: It is related to the colour properties of a visual stimulus.
3.4
contrast ratio
R
C
ratio between the luminance L and the luminance L
high low
L
high
Note 1 to entry: R = .
C
L
low
Note 2 to entry: Terms and definitions related to photometric quantities (e.g. illuminance, luminance, luminance
contrast and saturation) are given in CIE S 017/E:2011 ILV. In CIE S 017/E:2011 ILV, it is referred as luminance
contrast ratio.
3.5
critical specular line
CSL
line from the centre of the display to the centre of the eyellipse (3.10)
3.6
cyclopean eyellipse
elliptical volume combining the left and the right eyellipse (3.10) of the driver into one single volume
located in the centre between them
3.7
day condition
condition with diffuse ambient light
3.8
direct sunlight condition
condition under which the viewing conditions are mainly influenced by direct light from the sun on the
display surface
3.9
dynamic information
information that has more than two stages of change
3.10
eyellipse
elliptical shape of the driver eye range
Note 1 to entry: As defined in ISO 4513.
Note 2 to entry: See definition of 95th percentile eyellipse in ISO 4513.
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Note 3 to entry: It is the contraction of the words “eye” and “ellipse”.
3.11
flash
intended periodic variation of the luminance of a light or visual information, normally from “OFF” to a
given value, typically used for attracting attention
Note 1 to entry: Terms and definitions related to photometric quantities (e.g. illuminance, luminance, luminance
contrast ratio (3.4), saturation) are given in CIE S 017/E:2011 ILV.
3.12
flicker
unintended perceived temporal variation of the brightness (3.2) of a visual stimulus, usually generated
by refresh process of the display content or by variation of the luminance of the backlight
Note 1 to entry: Terms and definitions related to photometric quantities (e.g. illuminance, luminance, luminance
contrast ratio (3.4), saturation) are given in CIE S 017/E:2011 ILV.
3.13
disability glare
dazzling or disabling effect produced by a bright light
Note 1 to entry: This is a retinal effect, primarily caused by light scatter in the eye, which produces a luminous
veil over the retinal image and thus reduces contrast.
3.14
discomfort glare
distracting or disrupting effect of bright point sources in the field of view
Note 1 to entry: This is a perceptual effect, interfering with visual attention and selection.
3.15
jitter
unintended periodic movement of an image or parts of it
3.16
legibility
visual properties of a character or graphics representation that determine the ease with which it can be
recognized
Note 1 to entry: See also readability (3.21).
3.17
map
representation on plane surface of the features of a connected part of the earth surface (especially
of the road and traffic environment), shown in their representative forms, sizes and relationship in
accordance with some convention of representation
3.18
night condition
condition of low ambient illumination under which the adaptation (3.1) level of the driver is mainly
influenced by the portion of the road ahead covered by the vehicle’s own headlights and surrounding
street lights, and display and instrument brightness (3.2)
Note 1 to entry: Low ambient illumination is less than 50 lx.
3.19
pixel
smallest selectively addressable element of the display surface capable of reproducing the full range of
luminance and colours
Note 1 to entry: “Pixel” is an abbreviated term for “picture element”.
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ISO 15008:2017(E)

Note 2 to entry: Terms and definitions related to photometric quantities (e.g. illuminance, luminance, luminance
contrast ratio (3.4), saturation) are given in CIE S 017/E:2011 ILV.
3.20
quasi-static information
information that has a limited number of states, where one or another state
is always displayed and does not change frequently
EXAMPLE AM/PM, km/miles, kPa/PSI, on/off information.
3.21
readability
visual properties of a series of characters or words that determine the ease with which they can be read
Note 1 to entry: See also legibility (3.16).
3.22
redundantly presented information
information which is presented in parallel by different means or at different positions
EXAMPLE 1 Speed can be displayed in both analogue and digital format.
EXAMPLE 2 Turn-by-turn navigation can be displayed on a central display and in parallel in the instrument
cluster.
3.23
segment
pre-defined geometric form that can be used to create a character or symbol in whole or in part
EXAMPLE Stroke.
3.24
static information
information that does not change, especially physical units
EXAMPLE km, miles, kPa, PSI, mph, kph.
3.25
twilight condition
condition between night condition (3.18) and day condition (3.7)
Note 1 to entry: In twilight condition, the setting of the display illumination might be in day or night setting.
4 Requirements and measurement methods
4.1 General
The following requirements shall be complied with to ensure that images on the visual displays used in
on-board TICS equipment are legible.
Conformity of the presented images to the requirements specified in this document shall be tested at
an ambient temperature within the range of 18 °C to 28 °C. The test shall not start until the illumination
has reached a stable state. The requirements are accompanied by standard measurement conditions in
terms of ambient illuminance and observer positions. Methods for measurement of contrast shall be in
accordance with SAE J1757/1.
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4.2 Design viewing position and illumination range
4.2.1 Design viewing position
The requirements in this subclause are applicable to displays in their installed vehicle locations, as seen
from any point in the driver eyellipses according to ISO 4513 (for passenger vehicles only).
If the display is fixed to the vehicle, the relevant requirements shall be complied with from the
rearmost point of the cyclopean eyellipse. If the orientation of the display is adjustable, the display may
be adjusted so that a position can be found in which all the relevant requirements are complied with
simultaneously. For direct sunlight conditions, the requirements of contrast (see 4.3.2) shall only be
fulfilled in the direction of the critical specular line (CSL) (see Figure 1).
Standard default values for angles (45°/20°) as an alternative for direct sunlight measurements are
acceptable (see SAE J1757/1).
a)  Display at right-hand side of driver
© ISO 2017 – All rights reserved 5

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SIST EN ISO 15008:2017
ISO 15008:2017(E)


b)  Side view
c)  Plan view
Key
1 display 4L left eyellipse
2 centre of the display 4R right eyellipse
3 rearmost point of the cyclopean eyellipse 5 centre of the cyclopean eyellipse
4C cyclopean eyellipse N display perpendicular direction
Figure 1 — Design viewing position
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SIST EN ISO 15008:2017
ISO 15008:2017(E)

4.2.2 Illumination range
4.2.2.1 The design illumination range establishes the four conditions of:
— night;
— twilight;
— day with diffuse ambient light; and
— day with direct sunlight.
4.2.2.2 Night condition is replicated in a dark environment, such that the maximum illuminance on
the object to be measured shall not exceed 10 lx, with a relative tolerance of ±5 %. For the measurement
procedure, see SAE J1757/1:2015, Table 1.
4.2.2.3 Twilight condition is replicated with a measurement condition specified in SAE J1757/1:2015,
4.1.2.4 and Table 1. The ambient light measured on the surface of the display (on the standard diffuse
reflector) shall be 250 lx, with a relative tolerance of ±5 %. If the display setting is brought into the night-
time setting manually or automatically (e.g. triggered by the head lamp switch or a sun load sensor), the
displayed information shall meet the twilight requirements in 4.3.2 in the night-time setting. If the driver
can manually change the setting of the display to a higher contrast, the measurement may be made in
that display setting.
4.2.2.4 Day condition with diffuse ambient light is replicated with ambient light omni-directional
to the point of measurement. The ambient light measured on the surface of the display (on the standard
diffuse reflector) shall be 5 klx, with a relative tolerance of ±5 %. For the measurement procedure,
see SAE J1757/1:2015, 4.1 and Table 1.
4.2.2.5 Direct sunlight condition is replicated with a standard measurement condition. The
illuminance at the point of measurement shall be 45 klx, with a relative tolerance of ±5 %. For the
measurement proce
...