Adjustable HMD Arm Links for Eye Relief
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Solution Overview
Problem
Head-mounted displays (HMDs) often cause eye strain due to a fixed distance between the display panels and the user's face, leading to discomfort over extended use periods.
Innovation Solution
The implementation of adjustable arms with links that allow the front end assembly to be adjusted in height, distance, and angle relative to the back end assembly, comprising a front end assembly link, an interlink, and a back end assembly link, enabling rotatable connections and sliding movements along guiding tracks for optimal positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed distance is used between display panels and user's face, then the structure is simple and stable, but eye strain occurs after extended use
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed arm structure into an adjustable one. The arm assembly includes multiple links (front end assembly link, interlink, back end assembly link) connected by rotatable joints, allowing the distance between the front end assembly and back end assembly to be dynamically adjusted. This enables users to customize the display position to reduce eye strain while maintaining structural stability through the constrained rotational movements of the links.
2Ease of operation
If adjustable links are added to the arm assembly, then user comfort is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the arm assembly into multiple functional links: front end assembly link, interlink, and back end assembly link. Each link is connected through rotatable joints, allowing independent adjustment of each segment. This segmentation enables fine-grained control over the position and orientation of the front end assembly, providing users with comprehensive adjustability while keeping each individual component relatively simple.
Data Source
AI summary
Embodiments relate to adjustable arms in a head-mounted display. Each adjustable arm includes three separate links that are configured to allow a user to move a front end assembly in numerous ways in order to promote eye relief. Each adjustable arm is composed of a front end assembly link, an interlink, and a back end assembly link. These three links connect to each other in a rotatable manner, allowing a user to adjust the front end assembly into a position that provides the greatest degree of eye relief.