AR Headset Eye Tracking Depth Alignment
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Solution Overview
Problem
Conventional see-through AR head-mounted display devices fail to accurately account for depth information, leading to virtual information drifting and poor user experience due to the need for frequent eye focal length adjustments, resulting in device bulkiness, high cost, and uncontrollable accuracy.
Innovation Solution
A binocular see-through AR head-mounted display device with a line-of-sight tracking system that captures and processes eye-centered coordinate data to accurately position virtual information on the image display source, allowing for automatic depth adjustment and optimal fusion with the environment without additional hardware or high costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical means are adopted to adjust the optical structure of the optical lens group for changing the image distance, then the depth of field of the virtual image can be adjusted, but the device volume increases, cost increases, and accuracy becomes uncontrollable
Solution Approach 1:
The patent replaces the mechanical adjustment system (lens group movement) with a computational approach using line-of-sight tracking and coordinate mapping. The eye-centered coordinate system and pixel pair coordinate system establish a mathematical relationship that enables virtual image positioning without physical optical component adjustment, thereby eliminating the need for mechanical depth adjustment mechanisms.
Solution Approach 2:
The patent changes the control parameter from physical lens position to digital coordinate mapping. By using line-of-sight angle information and pre-established mapping relationships, the system adjusts virtual image depth through parameter calculation rather than mechanical movement, achieving precise depth control without increasing device volume.
2Manufacturing precision
If mechanical means are adopted to adjust the optical structure of the optical lens group for changing the image distance, then the depth of field of the virtual image can be adjusted, but the cost increases
Solution Approach 1:
The patent replaces expensive mechanical depth adjustment mechanisms with a software-based coordinate mapping system. The line-of-sight tracking module and mapping relationship calculation eliminate the need for costly optical component assemblies, reducing both manufacturing complexity and cost while maintaining depth adjustment functionality.
Solution Approach 2:
The patent uses virtual coordinate copying and mapping instead of physical optical component replication. The eye-centered coordinate system is mapped to the pixel pair coordinate system through computational algorithms, creating a virtual model that replaces the need for multiple physical optical adjustment mechanisms.
3Device complexity
If conventional see-through AR head-mounted display device overlaps AR information ignoring depth information, then the device structure is simple, but the virtual information drifts and fusion with environment is poor
Solution Approach 1:
The patent replaces simple but inaccurate coordinate overlay with a sophisticated line-of-sight tracking system. By capturing eye movement data and establishing mapping relationships between eye-centered coordinates and display pixel coordinates, the system achieves precise virtual information positioning that adapts to user gaze direction, eliminating drift without complicating the overall device structure.
Solution Approach 2:
The patent introduces feedback through line-of-sight tracking. The system continuously monitors user eye position and adjusts virtual information positioning based on real-time gaze data. This closed-loop feedback mechanism ensures virtual information remains accurately positioned relative to the user's focus point, improving environmental fusion while maintaining device simplicity.
Data Source
AI summary
Disclosed are a binocular see-through AR head-mounted device and an information displaying method thereof. Sight mapping relationship η is preset in the head-mounted device, human eye spatial sight information data of a user is tracked and calculated by a sight tracking system, virtual information that needs to be displayed is displayed on the left and right lines of sight of the human eyes on the basis of a binocular see-through AR head-mounted device virtual image imaging principle and a human eye binocular vision principle, thus implementing accurate overlap of the virtual information to the proximity of the position of the fixation point of the human eyes, allowing a high degree of integration of the virtual information with the environment, and implementing enhanced virtual reality in the true sense. The present invention provides a simple solution, requires only the sight tracking system to complete the process, obviates the need for excessive hardware facilities, and is inexpensive.