Headset Adjustment Assembly for IPD and Eye Relief Alignment
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Solution Overview
Problem
Conventional HMDs require separate manual mechanisms for adjusting interpupillary distance and eye relief distance, leading to bulkiness and adjustment difficulties, which can be cumbersome for users with varying distances.
Innovation Solution
An integrated adjustment assembly that allows simultaneous adjustment of interpupillary and eye relief distances using a single mechanism, incorporating a turnbuckle and slide system, with optional motor-driven operation and user input, and includes sensors for precise alignment based on individual user measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate manual mechanisms are used for adjusting interpupillary distance and eye relief distance, then adjustment functionality is provided, but the HMD becomes heavy and bulky
Solution Approach 1:
The patent combines separate adjustment mechanisms for interpupillary distance and eye relief distance into a single integrated adjustment assembly. This assembly includes a first adjustment mechanism for interpupillary distance and a second adjustment mechanism for eye relief distance that are mechanically integrated, allowing both adjustments to be made through one unified structure rather than separate mechanisms, thereby reducing overall weight and bulk.
Solution Approach 2:
The adjustment assembly is designed to perform multiple functions simultaneously - adjusting both interpupillary distance and eye relief distance through an integrated structure. This multi-functional design eliminates the need for separate dedicated mechanisms for each adjustment type, reducing the overall mechanical complexity and weight of the HMD while maintaining full adjustment capabilities.
2Ease of operation
If separate manual mechanisms are used for adjusting interpupillary distance and eye relief distance, then adjustment functionality is provided, but adjustment difficulty increases
Solution Approach 1:
The patent integrates multiple adjustment functions into a single adjustment assembly that combines the first adjustment mechanism for interpupillary distance and the second adjustment mechanism for eye relief distance. This integration reduces the number of separate mechanical components and adjustment steps required, thereby simplifying the overall mechanical complexity while maintaining full adjustment functionality.
Solution Approach 2:
Within the integrated adjustment assembly, the patent maintains distinct first and second adjustment mechanisms for interpupillary distance and eye relief distance respectively. This segmentation allows each adjustment function to operate independently within the unified structure, enabling precise control over each parameter without interfering with the other, thus simplifying the adjustment process despite the integrated design.
3Device complexity
If a single integrated adjustment assembly is used, then mechanical complexity is minimized, but adjustment precision may be compromised
Solution Approach 1:
The integrated adjustment assembly is segmented into distinct first and second adjustment mechanisms, where the first mechanism specifically controls interpupillary distance and the second mechanism controls eye relief distance. This segmentation ensures that each adjustment function maintains its own precision control independent of the other, preventing cross-interference while benefiting from the overall integration that reduces mechanical complexity.
Data Source
AI summary
A headset includes an optical assembly, an adjustment assembly, and a measurement component. The measurement component is configured to measure an interpupillary distance provided by an adjustment assembly in a first direction and an eye relief distance provided by the adjustment assembly in a second direction, where the first direction is orthogonal to the second direction. The measurement component includes a first rheostat configured to measure the interpupillary distance and a second rheostat configured to measure the eye relief distance, wherein the second rheostat is placed parallel to the first rheostat. The measurement component further includes a linkage configured to translate a motion of the adjustment assembly in the second direction to the first direction.