Stacked Insulated Electrode Actuator for Spark-Free Rigidity
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Solution Overview
Problem
Existing technologies for electrically induced mechanical movement, such as ERM vibration motors, LRA, and piezoelectric actuators, face issues like high power consumption, low durability, short lifespan, complex designs, and poor scalability, especially on flexible surfaces.
Innovation Solution
A stacked structure with at least two active element layers, featuring a first and second conductive surface with active and connecting regions, an elastic layer with nodules spanning a compression space, and solid binding edges with non-conductive adhesive to prevent lateral displacement and enhance electrical isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrically induced mechanical movement devices (ERM, LRA, piezoelectric actuators) are used, then mechanical movement is achieved, but power consumption is high and durability is low
Solution Approach 1:
The patent replaces conventional mechanical actuation systems (ERM motors, LRA, piezoelectric actuators) with an electrostatic actuation system that uses electric fields to directly deform an elastomeric membrane, eliminating the need for rotating masses, magnetic fields, or high-power piezoelectric materials
Solution Approach 2:
The patent changes the actuation mechanism from high-power mechanical/electromagnetic systems to low-power electrostatic fields, and transforms the structural parameters by using a flexible stacked membrane design that enables large-area actuation with reduced power consumption
2Device complexity
If conventional actuator designs are used, then mechanical movement is achieved, but the design complexity increases with external motors and masses
Solution Approach 1:
The patent extracts and eliminates external motors, rotating masses, and complex mechanical components from the actuator design, retaining only the essential electrostatic actuation elements (electrodes, dielectric layer, elastomeric membrane) to simplify the overall system
Solution Approach 2:
The patent uses a flexible elastomeric membrane as the actuating element, replacing rigid mechanical components with a thin-film structure that can be stacked and scaled, significantly reducing design complexity while improving reliability
3Adaptability or versatility
If conventional actuation methods are used, then mechanical movement is achieved, but scalability on flexible surfaces is poor
Solution Approach 1:
The patent divides the actuator into multiple stackable layers (first elastomeric membrane, first electrode, dielectric layer, second electrode, second elastomeric membrane), allowing the structure to be scaled by adding or removing layers to achieve desired actuation force and area
Solution Approach 2:
The stacked membrane structure serves multiple functions simultaneously: it provides mechanical actuation, maintains electrical isolation between layers, enables scalability across different areas, and ensures long-term durability through the robust elastomeric material
4Strength
If multiple AE layers are stacked to improve rigidity, then structural stability is achieved, but electrical isolation becomes critical to prevent sparks
Solution Approach 1:
The patent introduces a dielectric layer as an intermediary between the first and second electrodes, providing electrical isolation that prevents sparks while allowing the stacked structure to achieve the desired rigidity for mechanical stability
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 solution achieves good rigidity, electrical isolation, and cost-effective manufacturing, preventing sparks between layers and improving the scalability and durability of electrically induced mechanical movement devices.
Implementation Method 1
an elastic layer formed on the active region of the first conductive surface or on an exposed surface of the second substrate, the elastic layer comprising a plurality of elastic nodules spanning the compression space and contacting the second substrate, the plurality of elastic nodules configured to be compressed by relative movement of the first conductive surface and the second conductive surfaces toward each other in response to a voltage difference
Implementation Method 2
a first solid binding edge formed at one side of the active region of the first conductive surface and the second conductive surface, and coupled to the first active region of the first conductive surface and the second substrate with non-conductive adhesive
Data Source
AI summary
A stacked structure formed of two active element layers includes: a first substrate; a first conductive surface including a first active region; a second substrate; a second conductive surface including a second active region; a compression space between the first active region of the first conductive surface and the second substrate; an elastic layer formed on the first active region of the first conductive surface or on an exposed surface of the second substrate, and including a plurality of elastic nodules compressed by relative movement of the first conductive surface and the second conductive surface toward each other in response to a voltage difference, or in response to an external force; and a first solid binding edge formed at one side of the first active region of the first conductive surface and the second conductive surface, and coupled to the first active region and the second substrate.