Head-Mounted Optics Customization for Eye Pupil Alignment
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Solution Overview
Problem
Existing display optical equipment, such as head-mounted devices, lack user-specific customization, leading to inconsistent virtual image placement and reduced field of view for different users due to non-adaptation to individual face anatomy and preferences.
Innovation Solution
A method for customizing head-mounted devices by determining the 3D eye pupil position and adjusting the device's components, such as light sources, scanning elements, and reflective elements, to align the virtual image focus area with the user's eye pupil, ensuring correct focus and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If standard display optical equipment is used, then the device is simple and easy to manufacture, but the virtual image placement is inconsistent and the field of view is reduced for different users
Solution Approach 1:
The patent implements dynamic customization of the head-mounted device based on real-time detection of the user's eye pupil position and gaze direction. The device adjusts optical parameters such as focus area position and field of view dynamically to match each user's anatomical characteristics, transforming a static standard device into an adaptive system that automatically adapts to individual users without requiring manual configuration.
Solution Approach 2:
The patent changes key optical parameters including the position of the focus area, the field of view, and the optical axis orientation based on detected user-specific parameters. By modifying these parameters according to each user's eye pupil position and gaze direction, the system achieves precise virtual image placement while maintaining a standardized device structure.
2Area of stationary object
If the display device is adapted for an average user, then the device is easy to manufacture, but the virtual image is not entirely visible to users with different face anatomy, limiting the virtual field of view
Solution Approach 1:
The system dynamically adjusts the field of view and focus area position based on real-time detection of each user's eye pupil position and gaze direction. This dynamic adaptation ensures that the virtual image remains fully visible within each user's visual field regardless of their specific anatomical characteristics, transforming a fixed field of view into an adaptable optical parameter that automatically adjusts to individual users.
3Ease of operation
If conventional optical equipment is used, then the device structure is simple, but each individual user does not have the same visual experience when using the standard display optical device
Solution Approach 1:
The system performs self-service customization by automatically detecting the user's eye pupil position and gaze direction, then autonomously adjusting the optical parameters to optimize the visual experience. This eliminates the need for manual user configuration while ensuring each user receives a customized visual experience tailored to their anatomical characteristics and preferences.
Solution Approach 2:
The patent implements a feedback mechanism where the system continuously monitors the user's eye pupil position and gaze direction, adjusts the optical parameters accordingly, and maintains optimal visual alignment. This closed-loop feedback system ensures consistent visual comfort by automatically compensating for variations in user anatomy and viewing preferences.
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
Ensures that the virtual image is visible and focused through the user's pupil independently of face anatomy and wearing preferences, improving comfort and visual experience by aligning the image focus with the user's gaze direction.
Implementation Method 1
a scanning element configured to receive the light beam and to scan the received light beam towards the reflective element
Implementation Method 2
a reflective element configured to receive and redirect the light beam towards the focus area
Data Source
Figure 1~2A
Figure 2B~3C
Figure 4~5
AI summary
A method for customizing a head mounted device adapted to generate a virtual image for a wearer, the method comprises: - obtaining a 3D eye pupil position of the wearer in a reference frame and corresponding to a predetermined gaze direction, and - customizing the head-mounted device based on the 3D eye pupil position so that the position of a focus area (EMB) at least partly coincides with the position of the eye pupil in the predetermined gaze direction, wherein customizing the head-mounted device comprises controlling a recording of a holographic mirror based on the 3D eye pupil position in the reference frame.