Ergonomics — Accessible design — Accessibility of information presented on visual displays of small consumer products

This document specifies the methods to improve accessibility of the visual display on small consumer products in order to minimize inconveniences that a variety of users including people with disabilities and the elderly can experience while using those products. In particular, this document focusses on how to present information on small visual displays to make the product more accessible for older people and people with low vision or colour deficiency. The provision of different modalities or alternative ways of displaying information to make the product more accessible is not covered in this document. This document only covers accessibility with regard to visual presentation of information, not audio or tactile-based display methods. NOTE 1 Accessibility of a product can be enhanced by adopting alternative means to the visual presentation of the information, which is not covered in this document. For information about alternative forms of presentation, ISO/IEC Guide 71, ISO 9241‑112 and ISO 9241‑171 can be useful. NOTE 2 A comprehensive catalogue of accessibility needs and strategies for accommodation for all users (not only those with visual impairments) is out of scope for this document. Readers interested in this regard can refer to ISO/IEC 29138‑1. This document applies to various consumer products equipped with digital displays, in which the information about operation of the product is visually presented. The products are usually equipped with built-in display panels. The consumer products include those hand-held products that can be easily carried by the user or those that are not portable but equipped with small displays, though the size of the product or the display is not specified in this document. NOTE 3 This document focusses on the accessibility of small displays, regardless of the size of the consumer product. NOTE 4 Examples include, but are not limited to, electronic thermometers, digital cameras, air-conditioning systems, remote controllers. This document is not applicable to those products with high flexibility or adjustability in presenting information on the display. Some examples are web- or application-based displays of ICT devices such as smart phones, smart TVs, and tablet PCs. It is not applicable to touch-based displays that have both the functions of display and control. Some examples are touch interfaces of smart watches or digital cameras. Finally, accessibility issues relating to indicating lamps/lights used for simple alerts or alarm are covered in ISO 24550 and are not considered in this document. NOTE 5 There are many accessibility issues in the touch interface related to information presentation as well as control function and they need to be dealt with together. It is possible that some guidance of this document is not applicable to some products, such as oral or ear thermometers, which have extremely small in-built displays.

Ergonomie — Conception accessible — Accessibilité des informations présentées sur les écrans de visualisation des produits de consommation de petite taille

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Status
Published
Publication Date
10-Mar-2020
Current Stage
6060 - International Standard published
Start Date
11-Mar-2020
Completion Date
11-Mar-2020
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ISO 24552:2020 - Ergonomics -- Accessible design -- Accessibility of information presented on visual displays of small consumer products
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INTERNATIONAL ISO
STANDARD 24552
First edition
2020-03
Ergonomics — Accessible design —
Accessibility of information presented
on visual displays of small consumer
products
Ergonomie — Conception accessible — Accessibilité des informations
présentées sur les écrans de visualisation des produits de
consommation de petite taille
Reference number
ISO 24552:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 24552:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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ii © ISO 2020 – All rights reserved
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ISO 24552:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Basic design principles .................................................................................................................................................................................. 2

5 Display elements .................................................................................................................................................................................................. 3

5.1 Alphanumeric characters ............................................................................................................................................................... 3

5.2 Symbols and icons ................................................................................................................................................................................ 4

6 Presentation of information ..................................................................................................................................................................... 4

6.1 Arrangement of displayed elements .................................................................................................................................... 4

6.2 Displaying status and function .................................................................................................................................................. 4

6.3 Coding of visual information ....................................................................................................................................................... 5

7 Physical characteristics of digital displays ................................................................................................................................ 5

7.1 Luminance contrast ............................................................................................................................................................................ 5

7.2 Colour .............................................................................................................................................................................................................. 5

7.3 Blinking ......................................................................................................................................................................................................... 6

7.4 Time .................................................................................................................................................................................................................. 6

Bibliography ................................................................................................................................................................................................................................ 7

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 24552:2020(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 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 159, Ergonomics, Subcommittee SC 4,

Ergonomics of human-system interaction.

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.
iv © ISO 2020 – All rights reserved
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ISO 24552:2020(E)
Introduction

Visual displays are in-built in many consumer products to be used to present information about the

status, function or operation of the product to the users. If a product is big enough to adopt large

displays, it would be easy to make the various users including older or visually disabled people feel

comfortable in recognizing and understanding the presented information on the displays. Some small

consumer products, such as digital cameras and remote controllers of air conditioners, are equipped

with a small display because of the limited space on the product itself. The adoption of small display

can mean that many users experience difficulties in using those products because they cannot easily

recognize or understand the information visually presented on it. Among the many things that can be

done to make the product more accessible to the widest range of users, one thing is to carefully design

the visual information presented on the small display. This document provides design guidance on the

accessibility of visually presented information on small displays.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 24552:2020(E)
Ergonomics — Accessible design — Accessibility of
information presented on visual displays of small
consumer products
1 Scope

This document specifies the methods to improve accessibility of the visual display on small consumer

products in order to minimize inconveniences that a variety of users including people with disabilities

and the elderly can experience while using those products.

In particular, this document focusses on how to present information on small visual displays to make

the product more accessible for older people and people with low vision or colour deficiency. The

provision of different modalities or alternative ways of displaying information to make the product

more accessible is not covered in this document. This document only covers accessibility with regard to

visual presentation of information, not audio or tactile-based display methods.

NOTE 1 Accessibility of a product can be enhanced by adopting alternative means to the visual presentation of

the information, which is not covered in this document. For information about alternative forms of presentation,

ISO/IEC Guide 71, ISO 9241-112 and ISO 9241-171 can be useful.

NOTE 2 A comprehensive catalogue of accessibility needs and strategies for accommodation for all users (not

only those with visual impairments) is out of scope for this document. Readers interested in this regard can refer

to ISO/IEC 29138-1.

This document applies to various consumer products equipped with digital displays, in which the

information about operation of the product is visually presented. The products are usually equipped

with built-in display panels. The consumer products include those hand-held products that can be easily

carried by the user or those that are not portable but equipped with small displays, though the size of

the product or the display is not specified in this document.

NOTE 3 This document focusses on the accessibility of small displays, regardless of the size of the consumer

product.

NOTE 4 Examples include, but are not limited to, electronic thermometers, digital cameras, air-conditioning

systems, remote controllers.

This document is not applicable to those products with high flexibility or adjustability in presenting

information on the display. Some examples are web- or application-based displays of ICT devices such

as smart phones, smart TVs, and tablet PCs. It is not applicable to touch-based displays that have both

the functions of display and control. Some examples are touch interfaces of smart watches or digital

cameras. Finally, accessibility issues relating to indicating lamps/lights used for simple alerts or alarm

are covered in ISO 24550 and are not considered in this document.

NOTE 5 There are many accessibility issues in the touch interface related to information presentation as well

as control function and they need to be dealt with together.

It is possible that some guidance of this document is not applicable to some products, such as oral or ear

thermometers, which have extremely small in-built displays.
2 Normative references
There are no normative references in this document.
© ISO 2020 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 24552:2020(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
accessibility

extent to which products, systems, services, environments and facilities can be used by people from a

population with the widest range of user needs, characteristics and capabilities to achieve identified

goals in identified contexts of use

Note 1 to entry: Context of use includes direct use or use supported by assistive technologies.

[SOURCE: ISO 9241-112:2017, 3.15]
3.2
visual display panel

means of providing visible information to the user about the status of specific product functions and

operational characteristics

EXAMPLE An LCD display of a remote controller or an LCD display of a digital camera is a visual display

panel of the products.
3.3
visual coding
coding

method of displaying information composed of multiple levels or items separately by their physical

characteristics such as size, location, colour or luminance to enhance the degree of recognition,

identification or memorizing of the displayed information

EXAMPLE WLAN quality or battery status are displayed in a series of visual bars, where different colours

can indicate the overall status, e.g. red, yellow, green for low, medium or high network quality or battery capacity,

respectively.
4 Basic design principles

The following basic design principles should be considered in order to increase accessibility of the

information displayed on the visual display. The principles are applicable to displays of various sizes,

but if the product is large enough, the adoption of larger display should be considered first.

The design principles are mainly related to the accessibility of visual presentation of information,

which is within the scope of this document. However, it should be noted that the accessibility of the

product can be increased by adopting several modalities in presenting information either redundantly

or alternatively.
a) Information should be displayed in a simple and intuitive
...

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