Flexible Vibration Motor Electrostatic Actuation for Tactile Feedback
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Solution Overview
Problem
Conventional flexible vibration motors for providing tactile feedback have limited vibration frequency ranges, unsatisfactory human-skin-interfacing usability, and short operation life, hindering their integration with flexible and optical functions.
Innovation Solution
A flexible vibration motor with a new motor vibration mechanism, comprising a passive vibration signal transmission layer and a vibration driving layer with an electrode array, generates vibrations through an electric field-induced charge interaction, expanding the vibration frequency range and enhancing usability and operation life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional hard motor driving device is used, then the structure is simple, but the vibration frequency range is small and the appearance is bulky
Solution Approach 1:
The patent replaces the conventional mechanical hard motor driving device with a flexible vibration motor that uses electrostatic attraction between electrodes to generate vibration. This substitution enables a much wider vibration frequency range (up to 1000 Hz) while maintaining structural simplicity through the use of thin-film electrodes and passive vibration signal transmission layers.
Solution Approach 2:
The patent changes the fundamental operating parameters by using electrostatic fields instead of mechanical rotation, allowing the vibration frequency to be controlled through electrical signals rather than mechanical speed. This enables frequency control from 0 to 1000 Hz, dramatically expanding the vibration frequency range compared to conventional motors.
2Adaptability or versatility
If a flexible vibration motor with expanded vibration frequency range is designed, then the vibration frequency range increases, but the device complexity increases
Solution Approach 1:
The patent divides the vibration motor into distinct functional layers: vibration driving layers containing electrode arrays for generating electric fields, and passive vibration signal transmission layers for transmitting vibration signals. This segmentation allows each layer to be optimized independently and simplifies the overall design by assigning specific functions to specific components.
Solution Approach 2:
The flexible vibration motor is designed to perform multiple functions: generating tactile feedback across a wide frequency range (0-1000 Hz), providing flexible system integration, and enabling optical function integration through transparent materials. This multi-functionality is achieved within a unified structure that combines electrostatic driving and passive vibration transmission.
3Adaptability or versatility
If transparent materials are used for optical function integration, then optical functions can be integrated, but the vibration output may be reduced
Solution Approach 1:
The patent employs composite material structures combining transparent electrostatic actuation layers with vibration-transmitting layers. The electrode arrays are formed on transparent substrates that allow optical function integration while the composite structure maintains sufficient vibration output through the coordinated action of electrostatic attraction and passive vibration signal transmission.
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 flexible vibration motor achieves a significantly expanded vibration frequency range up to 1000 Hz, improved human-skin-interfacing usability, and extended operation life, while integrating flexibility and optical functions, making it suitable for various applications.
Implementation Method 1
the electrode array is configured to generate an electric field when a control signal is applied to the electrode array, and the passive vibration signal transmission layer is configured to generate induced charges induced by the electric field
Implementation Method 2
the passive vibration signal transmission layer is further configured to generate vibration to provide tactile feedback under an interaction of the electric field and the induced charges
Data Source
AI summary
The present disclosure relates to the technical field of tactile feedback, which discloses a flexible vibration motor for providing tactile feedback, tactile feedback systems and an electronic device. The flexible vibration motor of the present disclosure includes a passive vibration signal transmission layer; and a vibration driving layer; the passive vibration signal transmission layer and the vibration driving layer are arranged adjacent to each other in a vertical direction; the vibration driving layer comprises an electrode array; the electrode array generates an electric field when a control signal is applied to the electrode array, and the passive vibration signal transmission layer is configured to generate induced charges induced by the electric field; the passive vibration signal transmission layer is further configured to generate vibration to provide tactile feedback under an interaction of the electric field and the induced charges.