Video See-Through Head Mounted Display Dynamic Focus Adjustment
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Solution Overview
Problem
Current Video See-Through Head Mounted Display (VST-HMD) technologies fail to provide clear images outside the focus region, leading to an inconsistent user experience in Virtual Reality (VR), Mixed Reality (MR), and Augmented Reality (AR) applications.
Innovation Solution
The VST-HMD captures environmental image information using cameras and employs eye trackers to detect user eye motion, determining the eye focus region and depth information, which allows for dynamic adjustment of image positions on displays to maintain clear and stereoscopic visuals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed focus region is used in VST-HMD, then the image in the focus region is clear, but the image in other regions is not clear enough or not similar to the real world view
Solution Approach 1:
The patent implements dynamic adjustment of the focus region by detecting user eye motion and continuously updating the focus area on the display. The processor determines the eye focus region based on eye tracker data and adjusts the displayed image accordingly, allowing the system to adapt to changing user gaze directions and maintain clear images across different viewing regions rather than being fixed in one location
Solution Approach 2:
The system uses eye trackers to detect user eye motion and generates eye motion information as feedback. This feedback loop allows the processor to determine the current eye focus region and depth information, then adjust the image display position to keep the focused area sharp. The continuous monitoring and adjustment based on real-time eye tracking data resolves the contradiction between maintaining image clarity and covering a wider field of view
2Ease of operation
If the image position is adjusted dynamically based on eye motion, then the user experience is improved with clearer images, but the system complexity increases due to additional sensors and processing
Solution Approach 1:
The patent integrates multiple functions into a unified system where the eye tracker serves both as a detection device for user gaze and as a control input for image adjustment. The processor performs multiple tasks including determining eye focus region, calculating depth information, and adjusting display positions based on the same eye motion data, reducing the need for separate specialized components and simplifying the overall system architecture while maintaining enhanced user experience
Data Source
AI summary
A VST-HMD (Video See-Through Head Mounted Display) includes at least one camera, a first display device, a second display device, a first lens, a second lens, a first eye tracker, a second eye tracker, and a processor. The camera captures environmental image information. The first eye tracker detects left-eye motion information of a user. The second eye tracker detects right-eye motion information of the user. The processor determines an eye focus region of the user and depth information of the eye focus region according to the environmental image information, the left-eye motion information, and the right-eye motion information. The processor further monitors a displacement of the eye focus region and a change in the depth information, and accordingly determines whether to adjust image positions of the first display device and the second display device and/or focus of the camera.