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BS IEC 62908-12-10:2023

BS IEC 62908-12-10:2023

$189.07

Touch and interactive displays – Measurement methods of touch displays. Touch and electrical performance

Published By Publication Date Number of Pages
BSI 2023 48
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
7 FOREWORD
9 1 Scope
2 Normative references
3 Terms and definitions
4 Measuring conditions
4.1 Standard measuring environmental conditions
10 4.2 Standard atmospheric conditions for reference measurements and tests
4.3 Standard positioning equipment and setup
Tables
Table 1 – Standard conditions for reference measurements and tests
11 4.4 Human operator alternative to standard positioning equipment
Figures
Figure 1 – Composition of test equipment
Figure 2 – Concept of performance measurement
12 4.5 Test bar and touch pen
Figure 3 – Example of manual test tool (left), positioning without triggering a touch event (middle) and recording a touch event (right)
13 5 Touch performance measurement methods
5.1 General
5.2 Accuracy test
5.2.1 Purpose
5.2.2 Test procedure
Figure 4 – Examples of test bars
14 Figure 5 – Location of edge area and centre area
Figure 6 – Point grid
15 Figure 7 – Accuracy definition
17 5.2.3 Report
5.3 Repeatability or jitter test
5.3.1 Purpose
Figure 8 – Example of measurement result and calculation of accuracy
18 5.3.2 Test procedure
Figure 9 – Repeatability in the touch sensor module
20 5.3.3 Report
5.4 Linearity test
5.4.1 Purpose
5.4.2 Test procedure
Figure 10 – Example of measurement result for repeatability
21 Figure 11 – Dragging line for linearity test
Figure 12 – Linearity definition
23 5.4.3 Report
5.5 Reproducibility test
5.5.1 Purpose
Figure 13 – Example of measurement and calculation of linearity
24 5.5.2 Test procedure
Figure 14 – Example of reproducibility test results
25 5.5.3 Report
Figure 15 – Reproducibility test procedure
26 5.6 Signal-to-noise ratio (SNR) test
5.6.1 Purpose
Figure 16 – Examples of measurements of reproducibility – Velocity dependence
27 5.6.2 Test procedure
Figure 17 – SNR definition concept
28 5.6.3 Report
5.7 Report rate test
5.7.1 Purpose
5.7.2 Test procedure
Figure 18 – Dragging direction for reporting time measurement
29 5.7.3 Report
5.8 Latency test
5.8.1 Purpose
5.8.2 Test procedure
Figure 19 – Reporting time interval measurement
Figure 20 – Latency measurement
30 5.8.3 Report
5.9 Electrical noise immunity test
5.9.1 Purpose
5.9.2 Test procedure
Figure 21 – Example of the effect of external noise
31 5.9.3 Report
5.10 Water droplet immunity test
5.10.1 Purpose
Figure 22 – External noise injection
Figure 23 – Report of external noise immunity
32 5.10.2 Test procedure
5.10.3 Report
5.11 Optical noise immunity test
5.11.1 Purpose
Figure 24 – Example of water drop effect
Figure 25 – Water droplet test procedure
33 5.11.2 Test procedure
5.11.3 Report
5.12 Power consumption test
5.12.1 Purpose
5.12.2 Test procedure
5.12.3 Report
5.13 Perpendicular hover distance test
5.13.1 Purpose
5.13.2 Test procedure
34 5.13.3 Report
6 In-plane hovering performance measurement methods
6.1 General
6.2 Accuracy test
6.2.1 Purpose
6.2.2 Test procedure
Figure 26 – Perpendicular hover distance measurement
35 Figure 27 – Point grid
Figure 28 – Accuracy definition for in-plane of XY coordinates on the target projection plane (l) of the active area
36 Figure 29 – Accuracy definition for Z coordinate on the target projection plane (l) of the active area
37 6.2.3 Report
6.3 Repeatability or jitter test
6.3.1 Purpose
6.3.2 Test procedure
38 Figure 30 – Repeatability for in-plane of XY coordinates on the target projection plane (l) of the active area
Figure 31 – Repeatability for Z coordinate on the target projection plane (l) of the active area
40 6.3.3 Report
6.4 Report rate test
6.4.1 Purpose
6.4.2 Test procedure
41 Figure 32 – Dragging direction of in-plane for reporting time measurement
Figure 33 – Dragging direction of Z-axis for reporting time measurement
42 6.4.3 Report
Figure 34 – Reporting time interval measurement
43 Annex A (informative) Electrical performance measurement methods of touch sensors
A.1 Resistance
A.1.1 General
A.1.2 Test samples
A.1.3 Measurement equipment
A.1.4 Procedures
Table A.1 – Specification of LCR impedance meter
44 A.1.5 Data analysis
A.1.6 Report
A.2 Trans-capacitance
A.2.1 General
A.2.2 Test samples
A.2.3 Measurement equipment
A.2.4 Procedure
Figure A.1 – Diagrammatic representation of measurement of resistance
45 A.2.5 Data analysis
A.2.6 Report
Figure A.2 – Diagrammatic representation of measurement of capacitance
46 Bibliography

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BS IEC 62908-12-10:2023
$189.07