Stylus Light Emitter Tracking for Head-Mounted Device Interaction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current head-mounted devices lack effective means to track free-space movements of users' hands and interact with the physical environment while providing immersive computer-generated reality experiences, limiting user interaction and immersion in virtual and mixed reality environments.
Innovation Solution
A system comprising a head-mounted device and a stylus equipped with light emitters and cameras, allowing for self-contained tracking of the stylus in three-dimensional space, enabling users to interact with virtual objects and view occluded spaces by capturing images with the stylus's cameras and projecting them onto the device's display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If head-mounted devices provide immersive computer-generated reality experiences, then user immersion is improved, but user interaction with the physical environment and free-space hand movements are limited
Solution Approach 1:
The system separates tracking functionality into independent components: light emitters on the stylus and cameras on the head-mounted device. This segmentation allows the stylus to be tracked independently in 3D space, enabling hand movement tracking without compromising the immersive display system.
Solution Approach 2:
Light emitters serve as intermediaries between the stylus and the camera system. The emitters reflect light that is captured by the cameras, enabling optical tracking of the stylus position and orientation in free space without requiring direct mechanical or electronic connection.
2Measurement precision
If the stylus is equipped with light emitters and cameras for self-contained tracking, then tracking precision in 3D space is improved, but device complexity increases
Solution Approach 1:
The system merges the tracking functionality into the existing head-mounted device and stylus components. The cameras are integrated into the head-mounted device's housing, and light emitters are incorporated into the stylus body, creating a unified tracking system without requiring separate external equipment.
Solution Approach 2:
The stylus performs self-tracking through its own light emitters that are detected by the system's cameras. The system uses its existing camera resources to track the stylus, and the stylus provides its own optical signature through light emitters, eliminating the need for additional specialized tracking hardware.
3Adaptability or versatility
If the stylus includes cameras to capture images of occluded spaces, then user ability to view hidden spaces is improved, but energy consumption increases
Solution Approach 1:
The cameras in the stylus serve multiple functions: they enable viewing of occluded spaces and simultaneously provide data for tracking the stylus's position and orientation. This multi-functionality reduces the need for separate dedicated components, thereby managing energy consumption more efficiently.
Solution Approach 2:
The system captures images at discrete time intervals rather than continuously streaming video. This periodic capture approach significantly reduces energy consumption while still providing real-time viewing capability for occluded spaces and sufficient data for tracking.
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
Enhances user interaction and immersion by allowing precise tracking of the stylus in 3D space and providing real-time images of hidden spaces, improving the accuracy and confidence of tracking determinations and enabling users to interact with virtual objects in a more immersive and interactive manner.
Implementation Method 1
The stylus can include one or more light emitters
Implementation Method 2
an outward facing camera configured to transduce movements of the stylus based on detection of the light emitters
Data Source
AI summary
A tracking system includes a stylus comprising a light emitter, a head-mounted device comprising an optical sensor configured to detect the light emitter, and a processor communicatively coupled to the optical sensor and configured to determine a position of the stylus based on detection of the light emitter.