AR Headset Antenna Array Resolves Directional Ambiguity
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Solution Overview
Problem
Current augmented reality (AR) head-mounted display systems face challenges in accurately determining the direction of radio emitting objects due to ambiguity in signal reception patterns, particularly when objects are positioned directly behind the user, leading to incorrect positioning of augmented reality indicia.
Innovation Solution
The system employs a head-mounted display with multiple antennas, including dipole and fractal antennas, to receive and process electromagnetic signals, using signal strength and phase comparisons to triangulate the position of radio emitting objects, and employs Bayesian statistics and gyroscope data to resolve 180-degree ambiguities and improve positional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antenna is used to receive electromagnetic signals, then the device complexity is reduced, but the measurement precision of direction of arrival deteriorates due to 180-degree ambiguities
Solution Approach 1:
The single antenna is segmented into multiple antenna elements (at least two) with different orientations. Each antenna element receives the electromagnetic signal independently, allowing the system to compare signal characteristics from multiple perspectives to resolve directional ambiguities that a single antenna cannot distinguish.
Solution Approach 2:
The system transitions from a single-point reception (one antenna) to a spatial distribution of reception points (multiple antennas in different orientations). This dimensional expansion in the spatial domain enables the system to triangulate and resolve the 180-degree ambiguities by analyzing signal arrival patterns from multiple spatial dimensions.
2Measurement precision
If multiple antennas with directional gain are used, then the measurement precision of direction of arrival is improved, but the device complexity increases
Solution Approach 1:
The multiple antenna elements serve dual functions: they individually receive electromagnetic signals with their directional gain characteristics, and collectively they provide spatial diversity for ambiguity resolution. This multi-functionality allows the system to achieve high measurement precision without requiring separate dedicated components for each function.
Solution Approach 2:
The patent combines multiple antenna elements with different orientations into a unified receiving system. By merging these antennas into a single integrated apparatus, the system achieves improved directional accuracy while managing complexity through unified signal processing that compares phases and amplitudes across all antenna elements simultaneously.
3Measurement precision
If signal processing using phase and amplitude comparison is implemented, then the measurement precision of position determination is improved, but the use of energy increases
Solution Approach 1:
The system performs partial signal processing by comparing only the essential parameters (phase and amplitude) needed for direction determination, rather than performing exhaustive analysis of all signal characteristics. This selective processing approach achieves sufficient position determination accuracy while minimizing energy consumption compared to complete signal characterization.
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
This approach enables precise determination of the direction and distance of radio emitting objects, accurately positioning augmented reality indicia within the user's field of view, even when objects are behind the user, enhancing the overall AR experience.
Implementation Method 1
receive and process electromagnetic signals, using signal strength and phase comparisons to triangulate the position of radio emitting objects
Implementation Method 2
using signal strength and phase comparisons to triangulate the position of radio emitting objects
Implementation Method 3
employs Bayesian statistics and gyroscope data to resolve 180-degree ambiguities and improve positional accuracy
Implementation Method 4
employs Bayesian statistics and gyroscope data to resolve 180-degree ambiguities
Data Source
AI summary
In accordance with one example embodiment of the present invention, a plurality of antennas that are arranged according to a predetermined geometrical pattern receive radio emission signals from nearby radio emitting objects. Said radio emission signals are used, at least in part, to exhibit augmented reality indicia on a display, wherein the position of said augmented reality indicia on said display approximately indicates the direction of arrival of said radio emission signals and is organized or corrected according to predetermined criteria. One or more databases, either positioned on the cloud, or on the headset, or at an intermediate apparatus, may store the data, settings, and authorizations associated with said radio emitting object to permit and regulate the representation of said augmented reality indicia.