Inside-Out 6-DoF VR Tracking with Wireless Electromagnetic and Optical Sensors
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Solution Overview
Problem
Existing mobile VR systems with 6-DoF functionality are limited by field of view and require wired connections to PCs, making them inconvenient and costly for panoramic PC games that require inside-out 6-DoF tracking of both heads and hands.
Innovation Solution
A virtual reality system comprising a head-mounted display with a central processing unit, a binocular fisheye camera, an IR camera, a TOF camera, and a wireless connection module, along with an input device equipped with inertial measurement units and electromagnetic transmitters/receivers, enabling 6-DoF spatial positioning, obstacle avoidance, gesture recognition, eyeball tracking, and wireless data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired connection solution is used to support 6-DoF PC games, then positioning precision and reliability are improved, but ease of operation and adaptability deteriorate due to movement restrictions and inconvenience
Solution Approach 1:
The patent replaces the wired mechanical connection system with a wireless electromagnetic communication system. The head-mounted display and input devices use wireless communication modules to transmit positioning and control data to the PC terminal, eliminating physical cables and enabling free movement within the tracking space while maintaining 6-DoF positioning precision.
Solution Approach 2:
The patent creates a universal wireless tracking system that can simultaneously support multiple functions: 6-DoF head tracking, 6-DoF hand tracking, gesture recognition, and full-body motion capture. This multi-functional system replaces the need for separate wired solutions for different VR applications, providing both reliability and ease of operation across various game scenarios.
2Reliability
If external camera or light tower solution is used, then 6-DoF tracking capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the tracking cameras from the external environment and integrates them directly into the head-mounted display. The binocular fisheye cameras are built into the HMD, eliminating the need for separate external camera systems or light towers, thereby reducing device complexity and cost while maintaining 6-DoF tracking capability.
Solution Approach 2:
The head-mounted display performs self-tracking using its own integrated binocular fisheye cameras and inertial measurement units. The system captures its own spatial position and orientation data without requiring external tracking infrastructure, enabling the device to serve its own tracking needs and reducing overall system complexity.
3Area of stationary object
If optical or ultrasonic solutions are used for hand tracking, then field of view is improved, but adaptability to panoramic PC games deteriorates
Solution Approach 1:
The patent replaces optical and ultrasonic hand tracking solutions with an electromagnetic-based wireless communication system. The input devices (controllers, gloves, or suits) equipped with electromagnetic transmitters communicate with the head-mounted display's electromagnetic receiver, enabling 6-DoF hand tracking that is fully compatible with panoramic PC games while maintaining wide field of view.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves high-precision 360-degree panoramic tracking, supports Roomscale-level position tracking, enables low-latency wireless data transmission, and enhances interaction modes with gesture detection and eyeball tracking, making it suitable for PC game platforms with improved convenience and cost-effectiveness.
Implementation Method 1
A virtual reality system is disclosed, which introduces a Time Of Flight (TOF) camera to implement high-precision plane and obstacle detection
Implementation Method 2
tracking of a spatial position and a spatial attitude of the virtual reality system through two fisheye cameras and an inertial measurement unit (IMU)
Implementation Method 3
an electromagnetic receiver provided on the head-mounted display, a second inertial measurement unit provided on the input device and an electromagnetic transmitter provided on the input device
Data Source
AI summary
The present disclosure provides a virtual reality system. The virtual reality system of the disclosure, comprising: a head-mounted display, an input device and a positioning module, wherein the head-mounted display comprises a central processing unit, a camera module connected with the central processing unit and a wireless connection module; the camera module comprises a binocular fisheye camera, an IR camera and a TOF camera, the positioning module comprises a first inertial measurement unit and an electromagnetic receiver provided on the head-mounted display, a second inertial measurement unit and an electromagnetic transmitter provided on the input device; the central processing unit, configured to implement data interaction and command control with the binocular fisheye camera, the IR camera, the TOF camera, the wireless connection module, the first inertial measurement unit and the electromagnetic receiver.