Piezoelectric Tactile Feedback Electrode Layout for Multi-Mode Amplitude
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tactile feedback apparatuses are limited in amplitude adjustment across different vibration modes, constraining the richness of tactile experiences.
Innovation Solution
A tactile feedback apparatus with a laminated structure of a base substrate, first and second electrode layers, and a piezoelectric layer, where electrode pairs form driving units that can be adjusted in number and configuration to match specific vibration modes, allowing for enhanced amplitude and flexibility in tactile sensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed electrode configuration is used, then the structure is simple, but the amplitude in multiple vibration modes is limited
Solution Approach 1:
The electrode structure is segmented into multiple independent electrode pairs arranged in sequence, where each electrode pair can be independently controlled to generate different vibration modes. This segmentation allows the system to achieve multiple vibration modes with high amplitude by selectively activating different electrode pairs, resolving the contradiction between structural simplicity and adaptability.
Solution Approach 2:
The patent implements dynamic electrode configuration by allowing the controller to selectively activate different combinations of electrode pairs based on the desired vibration mode. The electrode pairs can be dynamically grouped into driving units with varying numbers of pairs, enabling the system to adapt its vibration characteristics in real-time while maintaining a relatively simple physical structure.
2Adaptability or versatility
If electrode pairs are combined into driving units with different numbers, then multiple vibration modes are achieved, but the control complexity increases
Solution Approach 1:
The electrode pairs serve multiple functions by being combinable into different driving units with varying numbers of pairs. Each electrode pair can participate in different vibration modes depending on how it is grouped, allowing a single electrode structure to achieve multiple vibration modes without requiring separate control mechanisms for each mode, thus reducing overall control complexity.
Solution Approach 2:
The system achieves different vibration modes by changing the parameter of the number of electrode pairs in each driving unit. The controller adjusts this parameter by selecting different combinations of electrode pairs, which simplifies the control process compared to managing independent control signals for each electrode, as it reduces the control dimension to primarily selecting the number of pairs per driving unit.
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 apparatus achieves maximum amplitude in various vibration modes, providing a more delicate and adjustable tactile experience by matching electrode configurations to desired vibration modes.
Implementation Method 1
a piezoelectric layer, and a second electrode layer that are laminated sequentially. A plurality of electrode pairs arranged sequentially along a row direction are formed in a portion where the first electrode layer and the second electrode layer overlap with each other
Data Source
AI summary
A tactile feedback apparatus includes a tactile feedback substrate and a controller. The tactile feedback substrate includes a base substrate, a first electrode layer, a piezoelectric layer, and a second electrode layer that are laminated sequentially. A plurality of electrode pairs arranged sequentially along a row direction are formed in a portion where the first electrode layer and the second electrode layer overlap with each other. The controller is configured to be capable of determining one driving mode from a plurality of driving modes as a target driving mode. In any of the driving modes, the electrode pairs are combined to form a plurality of driving units adjoined in sequence along the row direction. The number of the electrode pairs in each driving unit is different in different driving modes. The controller is further configured to drive one or more of the driving units of the target driving mode.