Tunable Lens Module Using Fluid Pressure to Adjust Dual Surfaces
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Solution Overview
Problem
Head-mounted devices often have lenses with fixed shapes and properties, making it difficult to optimally present content to each user without manual adjustment.
Innovation Solution
A head-mounted device with a lens module comprising a first transparent lens element, a lens shaping structure, and actuators that adjust the position of a semi-rigid second transparent lens element, changing its curvature through gauge pressure, allowing dynamic adjustments without additional actuators on the second lens element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional actuators are added to adjust the second transparent lens element, then the adjustability of the lens module is improved, but the device complexity increases
Solution Approach 1:
A fluid-filled chamber is introduced as an intermediary between the first and second transparent lens elements. The actuators adjust the first lens element, which changes the gauge pressure in the fluid-filled chamber, thereby indirectly adjusting the curvature of the second lens element without direct mechanical connection
Solution Approach 2:
The patent uses a fluid-filled chamber to transmit pressure changes from the first lens element to the second lens element. By manipulating the fluid pressure through actuator-driven adjustment of the first lens, the curvature of the second lens is controlled hydraulically, eliminating the need for separate actuators
2Device complexity
If fixed lenses are used in head-mounted devices, then the device complexity is reduced, but the ability to optimally present content to each user deteriorates
Solution Approach 1:
The patent transforms fixed lenses into dynamic, adjustable lenses. Both transparent lens elements can change their curvature through actuator control, enabling the lens module to adapt to different users' visual requirements while maintaining a relatively simple overall structure
Solution Approach 2:
The lens module is designed with multi-functionality to serve multiple users with different visual needs. The adjustable curvature of both lens elements allows the same device to optimize content presentation for various users, making the device universally adaptable without requiring user-specific customization
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 dynamic adjustment of lens curvature to accommodate individual user needs, enhancing the presentation of visual content without increasing device complexity or weight.
Implementation Method 1
When the actuators adjust the curvature of the first transparent lens element, the gauge pressure applied to the second transparent lens element is changed. This causes a change in curvature of the second transparent lens element.
Implementation Method 2
the second transparent lens element may be a semi-rigid transparent lens element. When the actuators adjust the curvature of the first transparent lens element, the gauge pressure applied to the second transparent lens element is changed. This causes a change in curvature of the second transparent lens element.
Data Source
AI summary
A lens module may include a first lens element, a lens shaping structure that is coupled to the first lens element, and a plurality of actuators that are configured to adjust a position of the lens shaping structure to adjust the first lens element. The lens module may also include a second lens element and a fluid-filled chamber between the first and second lens elements. To allow dynamic adjustments of the second lens element without requiring additional actuators, the second lens element may be a semi-rigid lens element. When the actuators adjust the curvature of the first lens element, the gauge pressure applied to the second lens element is changed. This causes a change in curvature of the second lens element. The actuators may therefore adjust the curvature of both the first and second lens elements even though none of the actuators are attached to the second lens element.