Head-Mounted Display Gesture Space Collision Avoidance
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Solution Overview
Problem
Existing head-mounted displays (HMDs) do not effectively avoid collisions between users due to gesture operations, particularly when users are facing different directions or have shielding objects, and may adjust operating spaces too narrowly, reducing convenience.
Innovation Solution
The HMD includes a distance image acquisition unit to detect gesture operations and nearby persons or objects, a position information acquisition unit for self and other HMDs, and a control unit to adjust operating spaces to avoid collisions by exchanging information and adjusting the projection of mixed reality objects to prevent overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gesture operations are performed without HMDs, then convenience is high, but collision between users may occur
Solution Approach 1:
The patent introduces an intermediary system consisting of cameras, markers, and control units that mediate between users performing gesture operations. The system detects user positions and gesture spaces through cameras and markers, then uses control units to adjust operating spaces to prevent collision, allowing users to maintain convenience while avoiding harmful interactions
Solution Approach 2:
The patent implements feedback mechanisms where the system continuously monitors user positions and gesture operations through cameras and distance image acquisition units. Based on this feedback, the control unit dynamically adjusts operating spaces and provides notifications to prevent collision, enabling real-time adaptation to user movements
2Object-affected harmful factors
If operating spaces are adjusted to avoid overlap between HMD users, then collision is avoided, but operating spaces become excessively narrow
Solution Approach 1:
The patent applies dynamics by making operating spaces adjustable and adaptive rather than fixed. The control unit dynamically modifies operating space boundaries based on real-time detection of user positions, gesture operations, and detected objects. This allows the system to expand operating spaces when safe and contract them only when necessary to avoid collision, maintaining convenience while preventing harmful interactions
Solution Approach 2:
The patent changes parameters of operating spaces such as size, position, and boundaries based on detected conditions. When no objects are detected or when users are sufficiently distant, operating spaces maintain larger dimensions for convenience. When objects or users are detected within potential collision zones, the system adjusts parameters to reduce overlap, balancing safety with usability
3Device complexity
If marker detection is used to determine HMD position, then operating space adjustment is enabled, but detection fails when HMD faces opposite direction or shielding object exists
Solution Approach 1:
The patent makes the detection system universal by combining multiple detection methods: camera-based marker detection, distance image acquisition unit detection, and object detection functions. This multi-functional approach ensures that if one detection method fails (e.g., marker not visible due to orientation or shielding), other methods can still detect user positions and operating spaces, maintaining reliability across various scenarios
Solution Approach 2:
The patent introduces an intermediary detection layer using distance image acquisition units and object detection functions that can operate independently of marker visibility. These intermediary detection mechanisms can perceive user positions and spatial relationships even when markers are not detectable, ensuring continuous and reliable operation across different environmental conditions
Data Source
AI summary
A head-mounted display (HMD) 1, which is operated by a gesture operation performed by a user 3, is provided with a distance image acquisition unit 106 that detects a gesture operation, a position information acquisition unit 103 that acquires position information of the HMD 1, and a communication unit 2 that performs communication with another HMD 1′. A control unit 205 sets and displays an operating space 600 where a gesture operation performed by the user 3 is valid, exchanges position information and operating space information of the host HMD 1 and the other HMD 1 therebetween by the communication unit 2, and adjusts the operating space of the host HMD so that the operating space 600 and an operating space 600′ of the other HMD 1 do not overlap each other.