Multilayer Fluidic Membranes for High-Resolution Wearable Haptics
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Solution Overview
Problem
Traditional haptic devices are limited by single actuation resolution, restricting their haptic capabilities and often require bulky designs that are uncomfortable for users, making them unsuitable for wearable applications.
Innovation Solution
A multilayer membrane with fluidic transducers, where each layer can be actuated independently to produce different actuation resolutions, allowing for a combination of actuations to achieve higher resolution haptic feedback, integrated into wearable devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer electroactive polymer is used, then the device structure is simple, but the actuation resolution is limited
Solution Approach 1:
The patent divides the single-layer structure into multiple layers, each with different actuation resolutions. The first layer has a first actuation resolution and the second layer has a second actuation resolution, allowing the system to achieve multiple actuation resolutions by selectively actuating different layers.
Solution Approach 2:
The patent adds a vertical dimension by stacking multiple layers with different actuation resolutions. This multi-layer configuration enables the system to achieve fine actuation resolution without increasing the horizontal footprint, effectively solving the contradiction between device complexity and actuation precision.
2Manufacturing precision
If traditional haptic devices are designed to provide high actuation resolution, then the haptic capability is enhanced, but the device becomes bulky and uncomfortable for wearables
Solution Approach 1:
The patent utilizes the vertical stacking of multiple layers to achieve high actuation resolution without increasing the lateral dimensions. This approach maintains a compact form factor suitable for wearable devices while providing fine actuation control through the multi-layer structure.
Solution Approach 2:
The patent embeds multiple functional layers within a compact structure, where the first and second layers of fluidic transducers are positioned at different heights. This nested arrangement allows high-resolution haptic feedback to be achieved within a small volume, making the device suitable for wearable applications.
3Manufacturing precision
If multiple layers of fluidic transducers are stacked, then multiple actuation resolutions are achieved, but the device complexity increases
Solution Approach 1:
The patent segments the actuation function across multiple layers, with each layer responsible for a specific actuation resolution. This segmentation allows the system to achieve multiple actuation resolutions while maintaining manageable complexity through modular layer design.
Solution Approach 2:
The patent designs the multilayer membrane to serve multiple functions simultaneously - each layer can be independently actuated to provide different actuation resolutions, and the layers can work together to produce combined haptic effects. This multi-functionality justifies the increased device complexity by delivering superior haptic performance.
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
The multilayer membrane provides enhanced haptic feedback with multiple actuation resolutions in a space-efficient form, suitable for wearable devices, enabling more immersive artificial reality experiences without the bulkiness of traditional haptic devices.
Implementation Method 1
applying a first electric potential to at least one of the first and second electrodes of a first transducer to actuate the first transducer may generate a first attractive force between the first and second electrodes of the first transducer
Implementation Method 2
Each layer of the multilayer membrane may include fluidic transducers which may use fluidic pressure to selectively deform portions of the multilayer membrane to produce haptic feedback
Data Source
AI summary
The disclosed device may include a first layer of fluidic transducers and a second layer of fluidic transducers. Each transducer in the first layer may include a first electrode coupled to a first substrate of the first layer, a second electrode coupled to a second substrate of the first layer, and a fluid channel between the first and second electrodes of the first layer. Each transducer in the second layer may include a first electrode coupled to a first substrate of the second layer, a second electrode coupled to a second substrate of the second layer, and a fluid channel between the first and second electrodes of the second layer. The second layer of fluidic transducers may be positioned on the first layer of fluidic transducers. Various other methods, systems, and computer-readable media are also disclosed.