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IEC 62908-12-20
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
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inside
Touch and interactive displays –
Part 12-20: Measurement methods of touch displays – Multi-touch performance
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IEC 62908-12-20
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
colour
inside
Touch and interactive displays –
Part 12-20: Measurement methods of touch displays – Multi-touch performance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120 ISBN 978-2-8322-7433-0
– 2 – IEC 62908-12-20:2019 IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Standard measuring conditions . 6
4.1 Standard environmental conditions . 6
4.2 Measuring equipment . 7
4.3 Test bar . 7
4.4 Test bar position . 7
5 Touch performance measuring methods . 8
5.1 Multi-touch support . 8
5.1.1 Purpose . 8
5.1.2 Test procedure . 8
5.1.3 Report . 8
5.2 Adjacent touch distance . 8
5.2.1 Purpose . 8
5.2.2 Test procedure . 9
5.2.3 Report . 9
5.3 Adjacent touch accuracy . 9
5.3.1 Purpose . 9
5.3.2 Test procedure . 10
5.3.3 Report . 10
5.4 Rotation . 10
5.4.1 Purpose . 10
5.4.2 Test procedure . 10
5.4.3 Report . 13
5.5 Pinch motion drifting . 14
5.5.1 Purpose . 14
5.5.2 Test procedure . 14
5.5.3 Report . 16
5.6 Multi-touch sliding . 16
5.6.1 Purpose . 16
5.6.2 Test procedure . 16
5.6.3 Report . 17
5.7 Multi-touch crosstalk . 17
5.7.1 Purpose . 17
5.7.2 Test procedure . 17
5.7.3 Report . 18
5.8 Fast tap . 18
5.8.1 Purpose . 18
5.8.2 Test procedure . 18
5.8.3 Report . 19
Figure 1 – Composition of measuring equipment . 7
Figure 2 – Examples of test bars . 7
Figure 3 – Location of edge area and centre area . 8
Figure 4 – Example of adjacent touch distance . 9
Figure 5 – Example of adjacent test bars on the X axis . 10
Figure 6 – Example of full circular rotation . 11
Figure 7 – Position of the centre of rotation . 11
Figure 8 – Definition of R , R and R . 14
min ref max
Figure 9 – Start points of test bars . 15
Figure 10 – Example of pinch motion drifting in the horizontal direction . 16
Figure 11 – Example of the multi-touch slide of three test bars in the vertical direction . 17
Figure 12 – Example of multi-touch crosstalk in the horizontal direction . 18
Figure 13 – Example of fast tap . 19
– 4 – IEC 62908-12-20:2019 IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TOUCH AND INTERACTIVE DISPLAYS –
Part 12-20: Measurement methods of touch displays –
Multi-touch performance
FOREWORD
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International Standard IEC 62908-12-20 has been prepared by IEC technical committee 110:
Electronic displays.
The text of this International Standard is based on the following documents:
FDIS Report on voting
110/1129/FDIS 110/1148/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62908 series, published under the general title Touch and
interactive displays, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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