Road vehicles — Visibility — Requirements and recommendations for automotive interior display systems

This document specifies requirements and recommendations regarding performance criteria for display systems in vehicles as a guideline for suppliers and manufacturers under normal operating conditions. This document applies to in-vehicle display systems designed to provide vital information to the driver and passenger. This document applies to the system as a whole as well as its relevant components, such as cover lenses, coatings, and properties of the device itself. This document covers display systems in passenger vehicles (including sport utility vehicles and light trucks) and commercial vehicles (including heavy trucks and buses). NOTE Static and dynamic laboratory testing and dynamic field operational assessment to measure display and cover glass attributes are also included, where available, in the scope of this document. This document is not applicable for: — technology and type of display device (e.g. LED, LCD, OLED); — manufacturing and handling of components in production; — electrical setup and integration into the vehicle; — EMC requirements for electrical subassemblies; — head-up display (HUD) and e-mirror displays [e.g. camera monitoring system (CMS)]; — behaviour in accidents besides the regulatory head impact test (HIT).

Véhicules routiers — Visibilité — Exigences et recommandations relatives aux systèmes d'affichage intérieur des véhicules automobiles

General Information

Status
Published
Publication Date
10-Sep-2025
Current Stage
6060 - International Standard published
Start Date
11-Sep-2025
Due Date
24-May-2025
Completion Date
11-Sep-2025
Ref Project
Technical specification
ISO/TS 8231:2025 - Road vehicles — Visibility — Requirements and recommendations for automotive interior display systems Released:11. 09. 2025
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34 pages
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ISO/DTS 8231 - Road vehicles – Visibility – Requirements and recommendations for automotive interior display systems Released:15. 04. 2025
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REDLINE ISO/DTS 8231 - Road vehicles – Visibility – Requirements and recommendations for automotive interior display systems Released:15. 04. 2025
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Standards Content (Sample)


Technical
Specification
ISO/TS 8231
First edition
Road vehicles — Visibility
2025-09
— Requirements and
recommendations for automotive
interior display systems
Véhicules routiers — Visibilité — Exigences et recommandations
relatives aux systèmes d'affichage intérieur des véhicules
automobiles
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Vehicle related terms .2
3.2 Device-related terms.3
3.3 Location-related terms.4
3.4 Optical- and display-related terms .5
3.5 Material-related terms .6
3.6 Coating-related terms .7
3.7 Test-related terms .8
4 1Considerations for the requirements of the display system . 8
4.1 General .8
4.2 Readability requirements .8
4.2.1 General .8
4.2.2 Readability .8
4.2.3 Visual comfort .8
4.2.4 Screen luminance.9
4.2.5 Screen luminance auto adjustment and flickering .9
4.2.6 Display response time .9
4.2.7 Glasses and sunglasses .9
4.2.8 Viewing area .9
4.2.9 Viewing angle .9
4.2.10 Two-dimensional (2D) and three-dimensional (3D) displays .9
4.3 Display and screen requirements .10
4.3.1 Cover lens .10
4.3.2 Luminance .10
4.3.3 Contrast .10
4.3.4 Ghosting .11
4.3.5 Black mura .11
4.3.6 Glare. 12
4.3.7 Sparkle . 12
4.3.8 Reflection and reflectance. 12
4.3.9 Colour and its attributes.14
4.3.10 Gamma .14
4.3.11 Haze .14
4.4 Environmental impact on interior displays . 15
4.4.1 General . 15
4.4.2 Illumination . 15
4.4.3 Automatic and adaptive display brightness . 15
4.4.4 Temperature range . 15
4.4.5 Humidity .16
4.5 Misuse resistance considerations .16
4.5.1 General .16
4.5.2 Scratches and dents .16
4.5.3 Severe push- and pull loads .16
4.5.4 Spilled liquids, lotions, and creams .17
4.5.5 Reset .17
5 Specific considerations for cover lenses . 17
5.1 General .17
5.2 Coatings of cover lenses .17
5.2.1 Anti-glare (AG) .18

iii
5.2.2 Anti-reflection (AR) .18
5.2.3 Easy-to-clean coating (ETCC) .18
5.2.4 Anti-fingerprint coating (AFC) .18
5.3 Breakage and frangibility .18
6 Reliability and durability requirements .18
6.1 General .18
6.2 Vibrations and mechanical shock .19
6.3 Scratch resistance .19
6.4 Abrasion resistance . .19
6.5 Severe push- and pull loads .19
6.6 Temperature and humidity testing .19
6.6.1 General .19
6.6.2 Temperature endurance testing . 20
6.6.3 Temperature cycling testing . 20
6.6.4 Humidity testing . . 20
6.6.5 Damp heat testing .
...


FINAL DRAFT
Technical
Specification
ISO/DTS 8231
ISO/TC 22/SC 35
Road vehicles – Visibility
Secretariat: UNI
– Requirements and
Voting begins on:
recommendations for automotive
2025-04-29
interior display systems
Voting terminates on:
2025-06-24
Véhicules routiers — Visibilité — Exigences et recommandations
pour les systèmes d'affichage dans l'habitacle des véhicules
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/DTS 8231:2025(en) © ISO 2025

FINAL DRAFT
ISO/DTS 8231:2025(en)
Technical
Specification
ISO/DTS 8231
ISO/TC 22/SC 35
Road vehicles – Visibility
Secretariat: UNI
– Requirements and
Voting begins on:
recommendations for automotive
interior display systems
Voting terminates on:
Véhicules routiers — Visibilité — Exigences et recommandations
pour les systèmes d'affichage dans l'habitacle des véhicules
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DTS 8231:2025(en) © ISO 2025

ii
ISO/DTS 8231:2025(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Vehicle related terms .2
3.2 Device-related terms.3
3.3 Location-related terms.5
3.4 Optical- and display-related terms .5
3.5 Material-related terms .7
3.6 Coating-related terms .7
3.7 Test-related terms .8
4 Considerations for the requirements of the display system . 8
4.1 General .8
4.2 Readability requirements .8
4.2.1 General .8
4.2.2 Readability .9
4.2.3 Visual comfort .9
4.2.4 Screen luminance.9
4.2.5 Screen luminance auto adjustment and flickering .9
4.2.6 Display response time .9
4.2.7 Glasses and sunglasses .9
4.2.8 Viewing area .9
4.2.9 Viewing angle .10
4.2.10 Two-dimensional (2D) and three-dimensional (3D) displays .10
4.3 Display and screen requirements .10
4.3.1 Cover lens .10
4.3.2 Luminance .10
4.3.3 Contrast .11
4.3.4 Ghosting .11
4.3.5 Black mura . 12
4.3.6 Glare. 12
4.3.7 Sparkle . 12
4.3.8 Reflection and reflectance. 13
4.3.9 Colour and its attributes.14
4.3.10 Gamma .14
4.3.11 Haze . 15
4.4 Environmental impact on interior displays . 15
4.4.1 General . 15
4.4.2 Illumination . 15
4.4.3 Auto and adaptive display brightness . 15
4.4.4 Temperature range .16
4.4.5 Humidity .16
4.5 Misuse resistance considerations .16
4.5.1 General .16
4.5.2 Scratches and dents .16
4.5.3 Severe push- and pull loads .17
4.5.4 Spilled liquids, lotions, and creams .17
4.5.5 Reset .17
5 Specific considerations for cover lenses . 17
5.1 General .17
5.2 Coatings of cover lenses .18
5.2.1 Anti-glare (AG) .18

iii
ISO/DTS 8231:2025(en)
5.2.2 Anti-reflection (AR) .18
5.2.3 Easy-to-clean coating (ETCC) .18
5.2.4 Anti-fingerprint coating (AFC) .18
5.3 Breakage and frangibility .19
6 Reliability and durability requirements . 19
6.1 General .19
6.2 Vibrations and mechanical shock .19
6.3 Scratch resistance .
...


© ISO TS8231 – All rights reserved
ISO/DTS _TS_8231
ISO/TC 22/SC 35/WG 2/ WG3
Secretariat: CUNI UNI
Date: 2025-04-14
Road vehicles – Visibility – Requirements and recommendations
for automotive interior display systems

DTS stage
Warning for WDs and CDs
This document is not an ISO International Standard. It is distributed for review and comment. It is subject to change
without notice and may not be referred to as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

ISO #####-#: ####(X)
Véhicules routiers — Visibilité — Exigences et recommandations pour les systèmes d'affichage dans l'habitacle
des véhicules
2 © ISO #### – All rights reserved

ISO TS/DTS 8231:####(X:(en)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
© ISO #### 2025 – All rights reserved
iii
ISO TS/DTS 8231:####(X:(en)
Contents
Foreword . Error! Bookmark not defined.
Introduction . Error! Bookmark not defined.
1 Scope . Error! Bookmark not defined.
2 Normative references . Error! Bookmark not defined.
3 Terms and definitions . Error! Bookmark not defined.
3.1 Vehicle related terms . Error! Bookmark not defined.
3.2 Device-related terms . Error! Bookmark not defined.
3.3 Location-related terms . Error! Bookmark not defined.
3.4 Optical- and display-related terms . Error! Bookmark not defined.
3.5 Material-related terms . Error! Bookmark not defined.
3.6 Coating-related terms . Error! Bookmark not defined.
3.7 Test-related terms . Error! Bookmark not defined.
4 Considerations for the requirements of the display system . Error! Bookmark not defined.
4.1 General . Error! Bookmark not defined.
4.2 Readability requirements . Error! Bookmark not defined.
4.3 Display and screen requirements . Error! Bookmark not defined.
4.4 Environmental impact on interior displays . Error! Bookmark not defined.
4.5 Misuse resistance considerations . Error! Bookmark not defined.
5 Specific considerations for cover lenses . Error! Bookmark not defined.
5.1 General . Error! Bookmark not defined.
5.2 Coatings of cover lenses . Error! Bookmark not defined.
5.3 Breakage and frangibility . Error! Bookmark not defined.
6 Reliability and durability requirements . Error! Bookmark not defined.
6.1 General . Error! Bookmark not defined.
6.2 Vibrations and mechanical shock . Error! Bookmark not defined.
6.3 Scratch resistance . Error! Bookmark not defined.
6.4 Abrasion resistance . Error! Bookmark not defined.
6.5 Severe push- and pull loads . Error! Bookmark not defined.
6.6 Temperature and humidity testing . Error! Bookmark not defined.
6.7 UV Light and weathering testing . Error! Bookmark not defined.
6.8 Chemical substance resistance . Error! Bookmark not defined.
6.9 Breakability tests of displays . Error! Bookmark not defined.
7 Behaviour in accidents . Error! Bookmark not defined.
7.1 Head impact test (HIT) . Error! Bookmark not defined.
(informative) Colour measurements . Error! Bookmark not defined.
(Informative) Test methods for coatings on cover lenses . Error! Bookmark not defined.
Bibliography . Error! Bookmark not defined.

© ISO #### 2025 – All rights reserved
iv
ISO TS/DTS 8231:####(X:(en)
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 documentsdocument 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 drawnISO draws attention to the possibility that some of the elementsimplementation of this
document may beinvolve the subjectuse of (a) patent(s). ISO takes no position concerning the evidence,
validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this
document, ISO had notreceived notice of (a) patent(s) which may be required to implement this document.
However, implementers are cautioned that this may not represent the latest information, which may be
obtained from the patent database available at www.iso.org/patents. 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 ).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, 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 www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road Vehiclesvehicles, Subcommittee SC 35,
Lighting and Visibilityvisibility.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
© ISO #### 2025 – All rights reserved
v
ISO TS/DTS 8231:####(X:(en)
Introduction
Display systems are increasingly replacing traditional instrument clusters in cars, trucks and other vehicles.
Transportation information and vehicle control systems (TICS) are now being integrated with one or two
digital display systems to provide vital information to drivers and passengers.
This display system can be located anywhere in front of the driver as the instrument cluster display, in the
centre of the vehicle, in front of the passenger on front or rear seats, or throughout the dashboard, or anywhere
in the vehicle.
The display system is intended to provide vehicle data, navigation, infotainment and other information such
as comfort and warning systems.
In the past, display systems were designed for static applications in the home or workplace, such as TV screens
or computer monitors. Mainly There are many IEC TC 110 and IEC TC 108 have workedstandards on electronic
display systems and established many standards.
An in-vehicle display system is not only exposed to the elements, but also to constant shock and vibration. A
touch screen will assemble fingerprint marks. Therefore, it is important that it can withstand cleaning
solutions, beverage and food spills. In addition, the display is subjected to misuse like scratches and dents.
Large displays put a significant area of glass in front of the passenger. The glass should not cause any bodily
injury if it breaks for any reason. The in-vehicle display system should function in all the environmental
operating and storage conditions for which the vehicle is designed. The display should also remain readable
and operable even after years of use.
The IEC has published standards for display device systems for video, TV and IT, covering operational, optical
and safety requirements. IEEE has published reports and articles about in-vehicle display technology,
recognizing the special requirements for displays as information systems in vehicles. The German Display
Forum (DFF) has established a European Original Equipment Manufacturer (OEM )) specification for in-
vehicle displays. Another source of information about optical measurements can be found in the Society for
Information Displays (SID) and its International Committee for Display Metrology (ICDM) standard.
© ISO #### 2025 – All rights reserved
vi
ISO TS/DTS 8231:####(X:(en)
Road vehicles – Visibility – Requirements and recommendations for
automotive interior display systems
1 Scope
The purpose of this document is to standardize definitionsspecify requirements and to
recommendrecommendations regarding performance criteria for display systems in vehicles as a guideline
tofor suppliers and manufacturers under normal operating conditions.
This document applies to in-vehicle display systems designed to provide vital information to the driver and
passenger. This document applies to the system as a whole as well as its relevant components, such as cover
lenses, coatings, and properties of the device itself.
This display system can be located anywhere in front of the driver as the instrument cluster display, in the
centre of the vehicle, in front of the passenger on front or rear seats, or throughout the dashboard, or anywhere
in the vehicle.The display system is intended to provide vehicle data, navigation, infotainment and other
information such as comfort and warning systems.This document covers display systems in passenger cars
(including sport utility vehicles and light trucks) and commercial vehicles (including heavy trucks and buses).
NOTE Static and dynamic laboratory testing and dynamic field operational assessment to measure display and cover
glass attributes are also included, where available, in the scope of this document.
This document is not applicable for:
— technology and type of display device (e.g. LED, LCD, OLED);
— electrical setup and integration into the vehicle;
— EMC requirements for electrical subassemblies;
— head-up (HUD) and e-mirror displays;
— behaviour in accidents besides the regulatory head impact test (HIT).
This document does not apply to head-up and e-mirror displays and does not deal with the handling of display
devices and its components in manufacturing and installation. I
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 15008, Road vehicles — Ergonomic aspects of transport information and control systems — Specifications
and test procedures for in-vehicle visual presentation
IEC 62977-2-1, Electronic displays - Part 2-1: Measurements of optical characteristics - Fundamental
measurements
IEC 62977-2-11 ED1, Electronic displays – Part 2-11: Measurement method of localof optical characteristics -
Local luminance and uniformity
IEC 62977-3-9 ED1:, Electronic displays - Part 3-9: Evaluation of optical performance - Measurements of
displayDisplay sparkle contrast
© ISO #### 2025 – All rights reserved
ISO TS/DTS 8231:####(X:(en)
IEC 63211-2–-21, Durability test methods for electronic displays – Part 2-21: Environmental tests – Test methods
for heat and humidity
IEC IEC 63211, -3-2, , Durability test methods for electronic displays - Part 3-2: Mechanical tes
...

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