Pupillary Adjustable Head Mounted Device Lens Alignment
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Solution Overview
Problem
Conventional near-eye display systems are sold with limited frame types, failing to accommodate consumers with unique pupillary distances, leading to suboptimal vision due to mismatched lens positions.
Innovation Solution
A pupillary lens adjustable head-mounted device (HMD) with a facebar, mirror/lens attachment mounts, and actuators allowing for three degrees of freedom in lens alignment, enabling precise adjustment to match individual pupillary distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If near-eye display systems are sold with specific frame types, then the device structure is simplified and easier to manufacture, but the adaptability to different pupillary distances is reduced
Solution Approach 1:
The patent implements adjustable lens mounts that can dynamically reposition the lenses along the temple pieces, allowing the device to adapt to different pupillary distances while maintaining a fixed frame structure. This dynamic adjustment capability resolves the contradiction by enabling versatility without requiring multiple frame types.
Solution Approach 2:
The lens mounting system is segmented into adjustable components that can be independently positioned. The lenses are separated from the fixed frame structure and mounted on adjustable holders that can be repositioned along the temple pieces, allowing customization for different pupillary distances while keeping the overall frame structure simple and manufacturable.
2Device complexity
If lenses are fixed in position on the frame, then the device complexity is reduced, but the precision of lens alignment with pupils is compromised
Solution Approach 1:
The lens mounting mechanism transitions from a fixed position to an adjustable position, allowing precise alignment with the user's pupils. The adjustable mounts can be repositioned along the temple pieces to match different pupillary distances, improving alignment precision while adding minimal complexity to the overall device.
3Adaptability or versatility
If adjustable lens mounts are added to accommodate different pupillary distances, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The adjustable lens mounting system serves multiple functions: it accommodates different pupillary distances, allows for customization to individual user needs, and maintains compatibility with the existing frame structure. This multi-functionality justifies the added complexity by providing versatile adaptability across different user requirements.
Data Source
AI summary
Embodiments of the present disclosure related to a head mounted display (HMD) that enable adjustment of lenses for a particular consumer. In some example embodiments, the HMD enables up to three-degrees of freedom of lens alignment with a consumer's pupils. For example, the HMD includes an actuation device or rotatable disc, both of which are in slidable engagement with at least one elongated members. Ends of the elongated members are coupled to a mirror/lens such that actuation of the actuation device or rotation of the disc translates the elongated member along an axis, which is in general alignment with a pupillary distance (PD) of the consumer. Additionally, the elongated members include mirror/lens interfaces to which the lenses are coupled. The mirror/lens interfaces are slidably and rotatably coupled to the elongated members thereby providing additional degrees of freedom for movement of the lenses.