Wireless Position Tracking Device for VR
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Solution Overview
Problem
Existing virtual reality controllers are bulky and inflexible, making it difficult to track objects or limbs in a hands-free state, and they are not easily adaptable to various sizes and user body types.
Innovation Solution
A wireless position tracking device with a rigid body, point light sources, a motion sensor, and a wireless transmission module that communicates with a head-mounted device to determine its position, allowing for flexible operation and wide applicability, including a wearable design for wrists with an ergonomic geometric shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional VR controller is used, then position tracking is achieved, but the volume and weight prevent flexible and convenient operation
Solution Approach 1:
The patent extracts the tracking functionality from a traditional bulky controller and implements it as a separate lightweight wearable device (wristband or finger ring) that can be worn on the user's body, eliminating the need to hold a heavy controller while maintaining tracking capability
Solution Approach 2:
The system segments the VR interaction into two parts: a lightweight wearable tracker on the user's body for position tracking, and a separate base station or handheld controller for other interactions, allowing the tracking function to be separated from the weight burden
2Adaptability or versatility
If a traditional VR controller is fastened to objects or limbs, then hands-free operation is achieved, but the device is not adaptable to various sizes and body types
Solution Approach 1:
The patent designs a universal wearable device with adjustable components (such as adjustable wristbands or finger rings) that can be fitted to different body parts and sizes, making it adaptable to various users and body types without requiring multiple specialized devices
Solution Approach 2:
The device incorporates dynamic adjustment mechanisms that allow the wearable tracker to be easily resized and reconfigured for different limbs and body types, enabling flexible adaptation rather than fixed sizing
3Ease of operation
If point light sources are arranged on a rigid body with inner concave surface, then the device fits ergonomically on limbs, but the structure becomes more complex
Solution Approach 1:
The patent employs curved and ergonomic designs in the wearable device, such as arc-shaped wristbands or contoured finger rings that naturally conform to the curved surfaces of human limbs, providing comfort and stability without requiring complex internal structures
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
Enables flexible and convenient operation by determining the posture of the tracking device relative to the head-mounted device, providing wide applicability and stability on different-sized limbs, and allowing the device to be easily fixed to various objects or users, enhancing interaction with virtual reality systems.
Implementation Method 1
a plurality of point light sources, wherein the point light sources are fixed to a plurality of positions outside the inner concave surface of the rigid body
Data Source
AI summary
A wireless position tracking device, a display system, and a wearable device are provided. The wireless position tracking device includes a rigid body, point light sources, a motion sensor, and a wireless transmission module. The rigid body has an inner concave surface, a head, a connecting portion, and a tail. The connecting portion connects the head and tail. The point light sources are fixed to positions outside the inner concave surface. The motion sensor locates in the rigid body for sensing a motion thereof and generating motion information. The wireless transmission module locates in the rigid body and electrically connects the motion sensor for wirelessly transmitting the motion information to the head-mounted device. An image capturing module of the head-mounted device captures a pattern formed by the point light sources. The head-mounted device calculates a relative position of the wireless position tracking device according to the pattern and motion information.