Head-Mounted Device Optical Adjustment Mechanism
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Solution Overview
Problem
Current head-mounted devices for computer-generated reality (CGR) lack effective mechanisms for adjusting optical components, such as interpupillary distance (IPD) and eye relief, to accommodate individual user preferences, leading to suboptimal viewing experiences.
Innovation Solution
A head-mounted device design featuring a two-part architecture with a shared first device portion and user-specific second device portion, incorporating adjustable optical modules, couplers, and adjuster mechanisms, including rails, springs, magnetic connectors, and pneumatic actuators, to allow precise adjustment of optical components based on user-specific settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed optical module configuration is used, then the device structure is simple, but the adaptability to different users is poor
Solution Approach 1:
The head-mounted device is divided into a first device portion and a second device portion that can be connected or disconnected. The optical modules are further segmented and can be adjusted independently within the first device portion, allowing customization for different users while maintaining a relatively simple overall structure.
Solution Approach 2:
The optical modules are designed to be dynamically adjustable through adjustment mechanisms that allow users to modify the position and orientation of optical components. This dynamic adjustability enables the same device to adapt to different users' anatomical features and preferences without requiring multiple fixed configurations.
2Manufacturing precision
If optical modules are made adjustable, then the viewing experience is improved, but the device complexity increases
Solution Approach 1:
Adjustment mechanisms serve as intermediary components between the user's manual input and the optical modules. These mechanisms translate simple user actions into precise optical adjustments, achieving high alignment precision without requiring complex direct manipulation of the optical components themselves.
Solution Approach 2:
The adjustment mechanisms are designed to be user-operable without requiring specialized tools or expertise. Users can independently adjust the optical modules to their preferred positions, and the mechanisms provide self-locking or self-retaining features that maintain the adjusted positions without continuous input.
3Adaptability or versatility
If a two-part device architecture is used, then the adaptability to user preferences is enhanced, but the connection reliability between parts may be reduced
Solution Approach 1:
The first and second device portions are designed to connect through coupling mechanisms that integrate the two separate parts into a unified structure during use. The coupling mechanisms ensure stable mechanical connection while allowing the parts to be easily separated when not in use, thus maintaining both connection reliability and user-specific adaptability.
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
Enables customized optical alignment and comfort for each user, improving the quality of the CGR experience by ensuring accurate IPD and eye relief settings, enhancing the overall usability and effectiveness of the device.
Implementation Method 1
magnetic connectors
Implementation Method 2
springs
Implementation Method 3
pneumatic actuators
Data Source
AI summary
A head-mounted device includes a first device portion and a second device portion. A first coupler portion of the first device portion is connectable to a second coupler portion of the second device portion to define a connected position in which the first device portion is connected to the second device portion and a disconnected position in which the first device portion is disconnected from the second device portion. A second adjuster portion of the second device portion causes a first adjuster portion of the first device portion to move a first optical module and a second optical module in response to movement of the first device portion and the second device portion from the disconnected position to the connected position.