IEC 62908-12-10:2023

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
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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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