IEC 62908-12-10:2023

Touch and interactive displays - Part 12-10: Measurement methods of touch displays - Touch and electrical performance

IEC 62908-12-10:2023 specifies the standard measuring conditions and measurement methods for determining touch and hovering performance of a touch sensor module. This document is applicable to touch sensor modules, where the structural relationship between touch sensor, touch controller, touch sensor module, display panel, touch display panel, and touch display module is defined in IEC 62908-1-2. This second edition cancels and replaces the first edition published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- added hovering performance measurement methods, especially in-plane characteristics at a constant distance from the touch sensor;
- added pen touch performance.

General Information

• Status: Published
• Publication Date: 29-Jan-2023
• ICS: 31.120 - Electronic display devices
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 9 - TC 110/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 27-Feb-2023
• Completion Date: 30-Jan-2023

Relations

• Revises: IEC 62908-12-10:2017 - Touch and interactive displays - Part 12-10: Measurement methods of touch displays - Touch and electrical performance
• Effective Date: 05-Sep-2023
• Revises: IEC 62908-12-10:2017/COR1:2018 - Corrigendum 1 - Touch and interactive displays - Part 12-10: Measurement methods of touch displays - Touch and electrical performance
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62908-12-10 ®
Edition 2.0 2023-01
INTERNATIONAL
STANDARD
colour
inside
Touch and interactive displays –
Part 12-10: Measurement methods of touch displays – Touch and electrical
performance
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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details all new publications released. Available online and once
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(IEV) online.
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If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 62908-12-10 ®
Edition 2.0 2023-01
INTERNATIONAL
STANDARD
colour
inside
Touch and interactive displays –

Part 12-10: Measurement methods of touch displays – Touch and electrical

performance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120 ISBN 978-2-8322-6393-8

– 2 – IEC 62908-12-10:2023 © IEC 2023
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Measuring conditions . 7
4.1 Standard measuring environmental conditions . 7
4.2 Standard atmospheric conditions for reference measurements and tests . 8
4.3 Standard positioning equipment and setup . 8
4.4 Human operator alternative to standard positioning equipment . 9
4.5 Test bar and touch pen . 10
5 Touch performance measurement methods . 11
5.1 General . 11
5.2 Accuracy test . 11
5.2.1 Purpose . 11
5.2.2 Test procedure . 11
5.2.3 Report . 15
5.3 Repeatability or jitter test . 15
5.3.1 Purpose . 15
5.3.2 Test procedure . 16
5.3.3 Report . 18
5.4 Linearity test . 18
5.4.1 Purpose . 18
5.4.2 Test procedure . 18
5.4.3 Report . 21
5.5 Reproducibility test . 21
5.5.1 Purpose . 21
5.5.2 Test procedure . 22
5.5.3 Report . 23
5.6 Signal-to-noise ratio (SNR) test . 24
5.6.1 Purpose . 24
5.6.2 Test procedure . 25
5.6.3 Report . 26
5.7 Report rate test . 26
5.7.1 Purpose . 26
5.7.2 Test procedure . 26
5.7.3 Report . 27
5.8 Latency test . 27
5.8.1 Purpose . 27
5.8.2 Test procedure . 27
5.8.3 Report . 28
5.9 Electrical noise immunity test . 28
5.9.1 Purpose . 28
5.9.2 Test procedure . 28
5.9.3 Report . 29
5.10 Water droplet immunity test . 29
5.10.1 Purpose . 29
5.10.2 Test procedure . 30

5.10.3 Report . 30
5.11 Optical noise immunity test . 30
5.11.1 Purpose . 30
5.11.2 Test procedure . 31
5.11.3 Report . 31
5.12 Power consumption test . 31
5.12.1 Purpose . 31
5.12.2 Test procedure . 31
5.12.3 Report . 31
5.13 Perpendicular hover distance test . 31
5.13.1 Purpose . 31
5.13.2 Test procedure . 31
5.13.3 Report . 32
6 In-plane hovering performance measurement methods . 32
6.1 General . 32
6.2 Accuracy test . 32
6.2.1 Purpose . 32
6.2.2 Test procedure . 32
6.2.3 Report . 35
6.3 Repeatability or jitter test . 35
6.3.1 Purpose . 35
6.3.2 Test procedure . 35
6.3.3 Report . 38
6.4 Report rate test . 38
6.4.1 Purpose . 38
6.4.2 Test procedure . 38
6.4.3 Report . 40
Annex A (informative) Electrical performance measurement methods of touch sensors . 41
A.1 Resistance . 41
A.1.1 General . 41
A.1.2 Test samples . 41
A.1.3 Measurement equipment . 41
A.1.4 Procedures . 41
A.1.5 Data analysis . 42
A.1.6 Report . 42
A.2 Trans-capacitance . 42
A.2.1 General . 42
A.2.2 Test samples . 42
A.2.3 Measurement equipment . 42
A.2.4 Procedure . 42
A.2.5 Data analysis . 43
A.2.6 Report . 43
Bibliography . 44

Figure 1 – Composition of test equipment . 9
Figure 2 – Concept of performance measurement . 9
Figure 3 – Example of manual test tool (left), positioning without triggering a touch

event (middle) and recording a touch event (right) . 1
...

IEC 62908-12-10 ®
Edition 2.0 2023-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Touch and interactive displays –
Part 12-10: Measurement methods of touch displays – Touch and electrical
performance
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 62908-12-10 ®
Edition 2.0 2023-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Touch and interactive displays –
Part 12-10: Measurement methods of touch displays – Touch and electrical
performance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120 ISBN 978-2-8322-6440-9

– 2 – IEC 62908-12-10:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Measuring conditions . 7
4.1 Standard measuring environmental conditions . 7
4.2 Standard atmospheric conditions for reference measurements and tests . 8
4.3 Standard positioning equipment and setup . 8
4.4 Human operator alternative to standard positioning equipment . 9
4.5 Test bar size, shape and material parameters touch pen. 10
5 Touch performance measuring measurement methods . 11
5.1 General . 11
5.2 Accuracy test . 11
5.2.1 Purpose . 11
5.2.2 Test procedure . 11
5.2.3 Report . 15
5.3 Repeatability or jitter test . 15
5.3.1 Purpose . 15
5.3.2 Test procedure . 16
5.3.3 Report . 18
5.4 Linearity test . 18
5.4.1 Purpose . 18
5.4.2 Test procedure . 18
5.4.3 Report . 21
5.5 Reproducibility test . 21
5.5.1 Purpose . 21
5.5.2 Test procedure . 22
5.5.3 Report . 23
5.6 Signal-to-noise ratio (SNR) test . 24
5.6.1 Purpose . 24
5.6.2 Test procedure . 25
5.6.3 Report . 26
5.7 Report rate test . 26
5.7.1 Purpose . 26
5.7.2 Test procedure . 26
5.7.3 Report . 27
5.8 Latency test . 27
5.8.1 Purpose . 27
5.8.2 Test procedure . 27
5.8.3 Report . 28
5.9 Electrical noise immunity test . 28
5.9.1 Purpose . 28
5.9.2 Test procedure . 28
5.9.3 Report . 29
5.10 Water droplet immunity test . 29
5.10.1 Purpose . 29
5.10.2 Test procedure . 30

5.10.3 Report . 30
5.11 Optical noise immunity test . 30
5.11.1 Purpose . 30
5.11.2 Test procedure . 31
5.11.3 Report . 31
5.12 Power consumption test . 31
5.12.1 Purpose . 31
5.12.2 Test procedure . 31
5.12.3 Report . 31
5.13 Perpendicular touch/hover distance test . 31
5.13.1 Purpose . 31
5.13.2 Test procedure . 31
5.13.3 Report . 32
6 In-plane hovering performance measurement methods . 32
6.1 General . 32
6.2 Accuracy test . 32
6.2.1 Purpose . 32
6.2.2 Test procedure . 32
6.2.3 Report . 35
6.3 Repeatability or jitter test . 35
6.3.1 Purpose . 35
6.3.2 Test procedure . 35
6.3.3 Report . 38
6.4 Report rate test . 38
6.4.1 Purpose . 38
6.4.2 Test procedure . 38
6.4.3 Report . 40
Annex A (informative) Electrical performance measuring measurement of touch
sensors . 41
A.1 Resistance . 41
A.1.1 General . 41
A.1.2 Test samples . 41
A.1.3 Measurement equipment . 41
A.1.4 Procedures . 41
A.1.5 Data analysis . 42
A.1.6 Report . 42
A.2 Trans-capacitance . 42
A.2.1 General . 42
A.2.2 Test samples . 42
A.2.3 Measurement equipment . 42
A.2.4 Procedure . 42
A.2.5 Data analysis . 43
A.2.6 Report . 43
Bibliography . 44

Figure 1 – Composition of test equipment . 9
Figure 2 – Concept of performance measurement . 9
Figure 3 – Example of manual test tool (left), positioning without triggering a touch
event (middle) and recording a touch event (right) . 10

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...