Transmissive Display Risk Overlay for Mobile Body Collision Avoidance
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Solution Overview
Problem
Current technologies lack effective measures to prevent collisions between users operating devices with transmissive display devices and other mobile bodies, such as robots or vehicles, especially when users enter shared working areas.
Innovation Solution
A transmissive display device that calculates and displays an interference risk region, determines the risk level based on the relative positional relationship between the user and mobile bodies, and provides notifications to the user to prevent collisions, using a combination of image display, sensor data, and planned trajectory information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a transmissive display device displays operation content to a user, then the user can operate the device efficiently, but the user may fail to recognize collision risks with mobile bodies in the working area
Solution Approach 1:
The working area is segmented into multiple risk levels (high-risk region, medium-risk region, low-risk region) based on distance from the mobile body. This segmentation allows the system to provide differentiated visual warnings while maintaining clear visibility of the operational environment, enabling users to operate efficiently while recognizing collision risks at appropriate detail levels.
Solution Approach 2:
Different color codes are assigned to different risk levels: red for high-risk regions, yellow for medium-risk regions, and green for low-risk regions. These color changes provide intuitive visual feedback to users about collision risks without obscuring the operational display content, thus maintaining both productivity and safety.
2Reliability
If the display device shows detailed interference risk information, then collision risk recognition is improved, but the display may obscure the outside scenery
Solution Approach 1:
The display overlay applies different transparency and detail levels to different regions of the display area. High-risk regions receive more prominent visual markers with lower transparency, while low-risk regions use subtler markers with higher transparency. This local quality differentiation ensures risk recognition is improved where needed without unnecessarily obscuring the outside scenery in safe areas.
Solution Approach 2:
The system applies visual risk indicators selectively only to portions of the field of view where actual risks exist, rather than overlaying the entire display area. This partial action approach provides sufficient risk information while maintaining clear visibility of the outside scenery in areas without potential hazards.
3Reliability
If the system provides continuous collision warnings, then safety is improved, but user distraction and operational interruption increase
Solution Approach 1:
The system provides collision warnings periodically based on the user's approach to different risk zones rather than continuously. As the user enters high-risk regions, visual warnings are activated; when the user moves to safer zones, the warnings are reduced or deactivated. This periodic warning approach maintains safety while minimizing operational interruptions and user distraction.
Solution Approach 2:
The warning system dynamically adjusts its intensity and presence based on real-time positional relationships between the user and mobile bodies. The visual indicators are activated or deactivated, and their prominence is adjusted according to the current risk level, providing safety information only when and where needed rather than continuously, thus maintaining operational continuity.
Data Source
AI summary
A transmissive display device includes an image display unit configured to transmit an outside scenery and display an image viewable with the outside scenery, an interference risk region calculation unit configured to calculate an interference risk region where there is a risk of interference between a user of the transmissive display device and a mobile body, a risk level determination unit configured to determine a risk level of the interference, based on a relative positional relationship between the user and the mobile body, and a display control unit configured to display, on the image display unit, an image indicating the interference risk region in a display mode according to the determined risk level.