Segmented Electrode Tactile Reproduction Device
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Solution Overview
Problem
Existing tactile reproduction devices using piezoelectric materials do not effectively utilize the piezoelectric ceramic film below the interdigital electrodes, limiting the efficiency of texture simulation.
Innovation Solution
A tactile reproduction device with a substrate and array-arranged piezoelectric units, each comprising a first electrode, a piezoelectric section, and a second electrode, where the second electrodes include comb electrodes with intersecting teeth and shank electrodes, and the first electrodes have non-connected electrode units within the projections of the comb electrodes, allowing for enhanced electric field generation and vibration of the piezoelectric sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If interdigital electrodes are used in piezoelectric tactile reproduction devices, then the device structure is simplified and manufacturing is easier, but the piezoelectric ceramic film below the interdigital electrodes is not effectively utilized, reducing texture simulation efficiency
Solution Approach 1:
The first electrode is divided into multiple isolated electrode units that are not connected to each other, allowing each unit to independently generate electric fields with the corresponding second electrode. This segmentation enables effective utilization of the entire piezoelectric ceramic film area, transforming the low-utilization interdigital electrode structure into a high-utilization segmented electrode structure while maintaining manufacturing simplicity
Solution Approach 2:
The patent transitions from the traditional planar interdigital electrode configuration to a three-dimensional stacked configuration with first electrodes (electrode units) and second electrodes (comb electrodes) arranged in layers. This dimensional change allows the electric fields to be generated throughout the volume of the piezoelectric ceramic film, dramatically improving utilization efficiency while preserving the ease of manufacture through standard lamination processes
2Productivity
If more piezoelectric sections are utilized, then texture simulation efficiency improves, but parasitic capacitance increases, reducing device reliability
Solution Approach 1:
By dividing the first electrode into multiple isolated electrode units, the patent creates electrically independent segments that can be individually controlled. This segmentation increases the effective utilization of piezoelectric sections for texture simulation while managing parasitic capacitance through proper electrical isolation and spacing of the units
Solution Approach 2:
The patent applies different electrode configurations to different regions: electrode units are strategically positioned and sized to optimize local electric field generation where needed for texture simulation, while maintaining appropriate spacing and isolation to minimize parasitic capacitance in other regions. This localized optimization achieves high texture simulation efficiency without compromising device reliability
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
This configuration increases the effective utilization of piezoelectric sections, enhancing the efficiency of texture simulation by improving the coefficient of friction and reducing parasitic capacitance, thereby improving the reliability and performance of the device.
Implementation Method 1
each of the piezoelectric units includes: a first electrode, a piezoelectric section, and a second electrode, which are laminated on the substrate in sequence
Data Source
AI summary
A tactile reproduction device, a method for driving the same, and a tactile reproduction apparatus. Tactile reproduction device may simulate textures to implement tactile reproduction. tactile reproduction device includes a plurality of piezoelectric units, includes: first electrode, piezoelectric section, and second electrode which are laminated, wherein the second electrode includes: first comb electrode and second comb electrode; the first comb electrode includes: a plurality of first comb-teeth electrodes and a first comb-shank electrode connecting the plurality of first comb-teeth electrodes; the second comb electrode includes: a plurality of second comb-teeth electrodes and a second comb-shank electrode connecting the plurality of second comb-teeth electrodes; the plurality of first comb-teeth electrodes and the plurality of second comb-teeth electrodes are mutually intersected; the first electrode includes a plurality of electrode units which are not connected to each other. The present disclosure is applicable to the production of tactile reproduction devices.