HMD Touch Calibration via Display Position Mapping
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Solution Overview
Problem
Existing head-mounted display (HMD) systems for virtual reality and augmented reality face limitations in user operability due to the need for camera-based tracking, which complicates the system, increases costs, and restricts user motion. Additionally, users wearing HMDs cannot easily interact with external real-world environments.
Innovation Solution
A method for controlling a head-mounted display apparatus through touch operations on a touch operation surface, where the system performs calibration by having the user touch specific display positions while conscious of those positions, allowing the system to associate touch positions with intended display positions without the need for camera-based tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If camera-based tracking is used to enable user operation in virtual space, then operability is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the camera component from the HMD system entirely, replacing camera-based tracking with a touch operation surface. The touchpad is integrated into the HMD without requiring external cameras or complex tracking infrastructure, thereby simplifying the system while maintaining operability.
Solution Approach 2:
The patent replaces the optical/mechanical camera-based tracking system with a direct touch interface. Instead of using cameras to detect operation member positions in 3D space, the system uses a touchpad that directly senses finger touches and maps them to virtual space coordinates through calibration.
2Ease of operation
If camera-based tracking is used to enable user operation, then operability is improved, but cost increases
Solution Approach 1:
The patent employs a touchpad that can be manufactured at low cost using standard touchsensor technologies. Instead of expensive camera modules, processors, and tracking infrastructure, the system uses a simple touch-sensitive surface with basic coordinate mapping capabilities.
3Adaptability or versatility
If HMD displays virtual space only, then immersion is improved, but user ability to interact with real world decreases
Solution Approach 1:
The touch operation surface serves multiple functions: it operates within the virtual space context when the HMD is worn, and can also be used for real-world interactions. The touchpad interface is versatile enough to handle both virtual object manipulation and external environment control without requiring separate input devices.
Data Source
AI summary
An information processing apparatus controls an HMD in accordance with touch operation on a touch operation surface. In calibration of the touch operation, the information processing apparatus controls the HMD such that a first display position, which is a position in an image displayed by the HMD, is identifiable, causes a user to perform touch on the touch operation surface while being conscious of the first display position, acquires information on a first touch position that is a position at which the touch is performed, controls the HMD such that a second display position that has a predetermined positional relation with the first display position is identifiable, causes the user to perform touch on the touch operation surface while being conscious of the second display position, and acquires information on a second touch position that is a position at which the touch is performed.