AR Head-Mounted Display Depth Calculation for Stable Virtual Overlay
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Solution Overview
Problem
Conventional AR head-mounted display devices fail to effectively integrate virtual information with the environment due to lack of depth calculation, leading to poor user experience and eye discomfort from frequent focal length adjustments.
Innovation Solution
A binocular see-through AR head-mounted display device that automatically adjusts the depth of field by mapping pupil center and stared point coordinates to screen coordinates, allowing virtual information to be seamlessly integrated with the environment without altering the optical structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional AR head-mounted display devices display virtual information without depth calculation, then the device structure remains simple, but the virtual information does not integrate well with the environment and causes eye discomfort
Solution Approach 1:
The patent changes the parameter of depth information by calculating depth values for virtual information elements and adjusting their display positions along the optical axis based on these depth values. This allows virtual information to be displayed at different depths corresponding to the real environment, improving integration quality without fundamentally changing the device structure.
2Reliability
If mechanical adjustment of optical lens group is used to adjust virtual image depth, then depth adjustment can be achieved, but the head-mounted device becomes bulky and costly
Solution Approach 1:
The patent replaces the mechanical adjustment system of optical lens groups with a computational approach. By calculating depth information and adjusting the display positions of virtual information elements in the image source, the system achieves depth adjustment without any mechanical movement of optical components, thereby avoiding increased device complexity and cost.
Solution Approach 2:
Instead of mechanically changing the optical path, the patent changes the display parameters of virtual information by adjusting their coordinates in the image source based on calculated depth values. This parameter-based approach achieves the same effect as mechanical optical adjustment but with simpler device structure.
3Device complexity
If virtual information is displayed without depth integration, then the display system remains simple, but user experience deteriorates due to poor environmental integration
Solution Approach 1:
The patent improves user experience by calculating depth values for virtual information and adjusting their display positions along the optical axis according to these depth parameters. This creates a more natural integration with the real environment, making the AR display more comfortable and intuitive for users without significantly complicating the display system.
Data Source
AI summary
A binocular see-through AR head-mounted display device and an information display method therefor are disclosed. The present invention uses the scene depth image and the user stared point to calculate the position of the target object stared by the user and maps coordinates to the screen coordinate system to determine the overlapping position of AR information. In addition, the present invention can tolerate small changes of human eye sight, and the AR information can be stably stacked in the same position with good robustness. The present invention can distinguish the target object stared by the user from the background, and when the user eye sight is put on different parts of the target object, the AR information is still superimposed at the same position without frequent movement with changes of the eye sight.