Head-Mounted Display Eye Focus Alignment
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Solution Overview
Problem
Traditional virtual image generation systems fail to align with human vision physiology, leading to user discomfort such as dizziness and fatigue due to the need for constant re-focusing when head and body posture change.
Innovation Solution
A head-mounted display system that incorporates a display device, photographic device for eye focus position, sensing device for head rotation, and monitoring device for body movement, processing device to generate a display image centered on a reference axis based on eye focus position, head movement, and body movement information, mimicking human vision physiology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional virtual image generation systems track head movement by turning the head, then the system can adapt to head posture changes, but the user experiences discomfort such as dizziness and fatigue due to the need for constant re-focusing
Solution Approach 1:
The system dynamically adjusts the virtual image generation based on real-time eye focus position detection. Instead of static head-tracking, the system continuously adapts the display content to match the user's actual focal point, creating a dynamic alignment between visual output and physiological response that eliminates the need for constant re-focusing
Solution Approach 2:
The system implements a feedback loop by detecting eye focus position and using this information to adjust subsequent virtual image generation. The eye focus position is continuously monitored and fed back to the processing device, which modifies the display content accordingly, creating a closed-loop system that automatically compensates for posture changes without causing user discomfort
2Device complexity
If the display image is generated without considering eye focus position, then the system complexity is reduced, but the virtual image does not align with human vision physiology
Solution Approach 1:
The system introduces an intermediary component (eye focus position detection) that bridges the gap between simple head tracking and complex physiological alignment. This intermediary provides the necessary data to adjust virtual image generation without requiring a complete overhaul of the system architecture, achieving physiological alignment through a targeted addition rather than comprehensive redesign
Solution Approach 2:
The system performs preliminary detection of eye focus position before generating or updating the virtual image content. By determining the focal point in advance, the system can pre-adjust the display parameters to ensure proper alignment with human vision physiology, avoiding the need for complex real-time corrections during image rendering
Data Source
AI summary
An image processing method includes the following operations: generate a display image by a display device; obtain an eye focus position by a photographic device; sense a head rotation angle to generate a head movement information by a sensing device; sense a body movement to generate a body movement information by a monitoring device; generate a focus target in the display image according to the eye focus position, generate a reference axis according to the focus target, and generate the display image according to the reference axis, the head movement information and the body movement information by a processing device.