Overview
IEC 62908-42-10:2025 - "Touch and interactive displays - Part 42-10" defines standardized measurement methods for motion-tracking image-control response time of interactive projection displays. It specifies standard measurement and environmental conditions and fundamental procedures to quantify latency when a projector’s image is interactively controlled in response to motion detected by sensors (e.g., cameras, LiDAR). The standard covers both full-frame and raster‑scanning projectors and supports repeatable laboratory testing using simple tools such as small projection patterns, photodiodes (PDs), and a high‑speed oscilloscope.
Key topics and technical requirements
- Scope and principle: Defines what constitutes motion‑tracking image‑control response time for interactive projection displays and why latency matters for safety and tracking fidelity.
- Standard measuring conditions: Environmental (dark‑room) and Device Under Test (DUT) setup requirements to ensure consistent measurements.
- Measurement setup & coordinate system: Guidance for physical arrangement of projector, sensors and measurement devices; coordinate systems for motions of the first, second and third objects in the interaction space.
- Measurement methods:
- Response time for motions of the first and second objects (typical moving surfaces/objects).
- Response time and waveform detection for third‑object intrusion (e.g., a person entering a projected region).
- Response envelope waveform analysis and reporting.
- High‑speed response procedures, including special considerations for raster‑scanning RGB laser projectors.
- Measurement instrumentation: Requirements and roles of light measuring devices (LMDs), photodiodes, and high‑speed oscilloscopes.
- Reporting: Standardized reporting elements to document measurement conditions and results for reproducibility.
Practical applications
- Projection mapping on moving platforms (vehicles, drones, performers) where synchronization between object motion and image must be verified.
- Interactive installations (museums, entertainment, retail) where user motion triggers projection changes and low latency is critical for perceived responsiveness.
- Safety systems that shut down or dim high‑intensity beams when a human body enters a protected region (photobiological safety).
- R&D and QA for projector manufacturers and system integrators validating motion‑tracking control loops and display responsiveness.
Who should use this standard
- Display and projector manufacturers
- System integrators implementing interactive projection and mapping
- Test laboratories and certification bodies
- Safety engineers and product developers working with motion‑tracking or high‑intensity projection systems
Related standards
- Other parts of the IEC 62908 series (Touch and interactive displays) and IEC technical committee 110 outputs provide complementary guidance for interactive-display testing and terminology.
Open preview (PDF)Touch and interactive displays - Part 42-10: Measurement methods of motion-tracking image-control response time for interactive projection display
