Adjustable Lenses for Head-Mounted Devices
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Solution Overview
Problem
Head-mounted devices with fixed lenses often struggle to optimally present visual content to users due to the difficulty in adjusting lens shapes to accommodate individual users' vision needs.
Innovation Solution
The integration of adjustable lens elements within the head-mounted device, comprising a transparent substrate, a collapsible wall with a flexible membrane, and a lens shaping component that dynamically adjusts the lens power by controlling the height of the collapsible wall, allowing for customizable lens shape and power to suit different users' vision requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed lenses are used in head-mounted devices, then the device structure is simple and manufacturing is easier, but the lens cannot be adjusted to accommodate individual users' vision needs
Solution Approach 1:
The patent implements a dynamically adjustable lens system where the lens element can change its shape and optical power in real-time. The lens includes a flexible membrane that can be deformed by actuators to adjust focal length and accommodate different vision requirements, transforming the static lens into a dynamic, adaptable optical component.
Solution Approach 2:
The patent changes the physical parameters of the lens by using actuators to modify the shape of the flexible membrane, thereby altering the lens curvature and optical power. This allows the same lens structure to operate at multiple focal lengths and adapt to individual user needs without requiring multiple fixed lenses.
2Ease of operation
If adjustable lens elements with collapsible walls are used, then lens power can be dynamically adjusted, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent employs a flexible membrane as the lens element, which can be deformed into different shapes to create varying optical powers. This flexible shell approach simplifies the adjustment mechanism compared to traditional rigid lens systems, as the membrane can be actuated by simple pressure changes or mechanical forces to achieve the desired lens shape.
Solution Approach 2:
The patent introduces a collapsible wall structure with bellows as an intermediary mechanism between the actuator and the lens membrane. This bellows structure allows for controlled volume changes and pressure regulation, enabling precise lens adjustment while isolating the complex actuation mechanism from direct contact with the optical element.
3Stability of the object's composition
If reinforced portions are added to the collapsible wall, then lateral movement is minimized, but the manufacturing precision requirements increase
Solution Approach 1:
The patent divides the collapsible wall into multiple segments with reinforced portions at specific intervals. These segmented reinforcement structures provide localized support to prevent lateral buckling while allowing the overall structure to remain collapsible. The segmentation approach reduces the manufacturing precision requirements compared to a fully reinforced structure, as each segment can be manufactured independently and assembled.
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 precise adjustment of lens power to accommodate users with varying vision needs, enhancing the clarity and comfort of visual content presentation for both left and right eyes, thereby improving the overall user experience.
Implementation Method 1
The collapsible wall may have bellows that allow the collapsible wall to fold on itself when compressed, thereby minimizing unintended lateral movement of the collapsible wall.
Implementation Method 2
The adjustable lens element may include a lens shaping component that applies a force to the collapsible wall to adjust a height of the collapsible wall relative to the transparent substrate, which in turn may be used to adjust the shape of the flexible membrane and the lens power of the lens element.
Implementation Method 3
The flexible membrane on the collapsible wall that together define an interior volume... adjust the shape of the flexible membrane
Data Source
AI summary
A head-mounted device may include one or more adjustable lens elements. The adjustable lens element may include a transparent substrate, a collapsible wall that forms an enclosed perimeter on the transparent substrate, and a flexible membrane on the collapsible wall that together define an interior volume. The interior volume may be filled with a fluid. The adjustable lens element may include a lens shaping component that applies a force to the collapsible wall to adjust a height of the collapsible wall relative to the transparent substrate, which in turn may be used to adjust the shape of the flexible membrane and thus the lens power of the lens element. The collapsible wall may have bellows that allow the collapsible wall to fold on itself when compressed, thereby minimizing unintended lateral movement of the collapsible wall.