IEC 62908-42-10:2025

Touch and interactive displays - Part 42-10: Measurement methods of motion-tracking image-control response time for interactive projection display

IEC 62908-42-10:2025 specifies standard measurement conditions and fundamental measurement methods of response time of interactive projection displays with sensors detecting the motion of the projector, the projected image on the object, or the third objects, interactively controlling the projection image responding to the motions.

General Information

• Status: Published
• Publication Date: 18-Mar-2025
• 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: 19-Mar-2025
• Completion Date: 11-Apr-2025

Standards Content (Sample)

IEC 62908-42-10 ®
Edition 1.0 2025-03
INTERNATIONAL
STANDARD
Touch and interactive displays –
Part 42-10: Measurement methods of motion-tracking image-control response
time for interactive projection display

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IEC 62908-42-10 ®
Edition 1.0 2025-03
INTERNATIONAL
STANDARD
Touch and interactive displays –

Part 42-10: Measurement methods of motion-tracking image-control response

time for interactive projection display

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120  ISBN 978-2-8327-0300-7

– 2 – IEC 62908-42-10:2025 © IEC 2025
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, abbreviated terms and symbols . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms. 8
3.3 Symbols . 8
4 Principle . 8
5 Standard measuring conditions . 9
5.1 General . 9
5.2 Standard measuring environmental conditions . 9
5.3 Standard measuring dark-room conditions . 9
5.4 Standard DUT conditions . 9
5.5 Standard light measuring device (LMD) requirements . 9
6 Standard measurement setup and coordinate system . 10
6.1 General . 10
6.2 Measurement setup . 10
6.3 Measurement coordinate system . 11
7 Measurement range . 12
8 Measurement methods . 12
8.1 General . 12
8.2 Response time measurement for the motion of the first object . 12
8.3 Response time measurement for the motion of the second object . 14
8.4 Response envelope waveform for the first or second object . 16
8.5 Response time measurement for the motion of the third object . 17
8.6 Response waveform for detecting the third object intrusion . 19
8.7 High-speed response time measurement . 19
8.8 High-speed measurement for raster-scanning laser projection display . 20
9 Report . 22
Annex A (informative) Example of response waveforms . 23
A.1 Example of the high-speed oscilloscope output for raster-scanning RGB
laser projection display. 23
A.2 Example of the high-speed oscilloscope output for a full-frame projection
display . 24
Annex B (informative) Example of projection patterns for measuring response time of
motions . 26
Annex C (informative) Examples of motion-tracking systems . 27
Bibliography . 29

Figure 1 – Categorization of motion . 10
Figure 2 – Measurement setup . 11
Figure 3 – Coordinate system related to the motion of the first and the second objects . 11
Figure 4 – Coordinate system related to the third object . 12
Figure 5 – Initial state before the motion of the first object . 13

Figure 6 – Motion status of the first object . 13
Figure 7 – Response detection status for the first object . 14
Figure 8 – Initial state before the motion of the second object . 15
Figure 9 – Motion status of the second object . 15
Figure 10 – Response detection status for the second object . 16
Figure 11 – Response envelope waveform displayed on oscilloscope for a small white
pattern on the dark background. 17
Figure 12 – Response envelope waveform displayed on oscilloscope for a small black
pattern on the white background . 17
Figure 13 – Initial state before the motion of the third object . 18
Figure 14 – Motion status of the third object . 18
Figure 15 – Response detection status for the motion of the third object . 19
Figure 16 – Response waveform displayed on oscilloscope when a black third object
enters the sensing range . 19
Figure 17 – Example of high-speed oscilloscope output of a pulse train repeating with
a period of the frame rate of a raster-scanning RGB laser projector . 20
Figure 18 – Example of high-speed oscilloscope output for measuring the response
time of a raster-scanning RGB laser projector when a small white pattern on the black
background disappears by a motion and then is controlled to reappear . 21
Figure 19 – Example of high-speed oscilloscope output for measuring the response
time of a raster-scanning RGB laser projector when a small black pattern on the white
background disappears by a motion and then is controlled to reappear . 21
Figure 20 – Example of higher-speed measurement using multiple PDs for raster-
scanning RGB laser projector . 22
Figure A.1 – Setup for measuring the PD output signal when the combined RGB laser
beams (white) is scanned across the PD . 23
Figure A.2 – Example of high-speed oscilloscope output when a PD detected the
scanning laser beams . 24
Figure A.3 – Example of measured response time displayed on a high-speed
oscilloscope for a raster-scanning laser projection display . 24
Figure A.4 – Example of measured response waveform including the PWM pulse
sequence for a full-frame projector . 25
Figure B.1 – Examples of the projection patterns for measuring the response time of
the motions of the first and the second objects . 26
Figure C.1 – Scanning angle of the LiDAR used in Figure C.2 . 27
Figure C.2 – Example of actual photo image (a) and the LiDAR 3D image data (b) . 28

Table 1 – Letter symbols . 8

– 4 – IEC 62908-42-10:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TOUCH AND INTERACTIVE DISPLAYS –

Part 42-10: Measurement methods of motion-tracking image-control
response time for interactive projection display

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