Piezoelectric Tactile Feedback Substrate for Multi-Mode Amplitude Control
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Solution Overview
Problem
Existing tactile feedback apparatuses are limited in amplitude adjustment across different vibration modes, constraining the richness and flexibility 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 adaptable to various vibration modes, allowing the controller to adjust the number and configuration of electrode pairs to maximize amplitude in each mode.
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 specific electrode pairs, thereby improving adaptability without requiring a completely complex reconfiguration of the entire electrode system.
Solution Approach 2:
The patent implements dynamic control of the electrode pairs through the controller, which can adjust the number and configuration of active electrode pairs based on the desired vibration mode. This dynamic adjustment capability enables the system to adapt to different vibration requirements in real-time, maximizing amplitude for each specific mode while maintaining a relatively simple base structure.
2Power
If the number of electrode pairs is increased, then the amplitude in target vibration mode is maximized, but the device complexity increases
Solution Approach 1:
The electrode pairs are designed with multi-functionality, where each electrode pair can contribute to multiple vibration modes depending on the control signals applied. This universal design allows a relatively small number of electrode pairs to achieve high amplitude across multiple vibration modes, eliminating the need to increase the total number of electrode pairs solely to maximize amplitude in specific modes.
Solution Approach 2:
The system achieves high amplitude by changing control parameters (driving signals) rather than increasing the physical number of electrode pairs. The controller adjusts the electrical parameters of the electrode pairs dynamically, allowing the same physical structure to produce high amplitude across different vibration modes through parameter optimization rather than hardware expansion.
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
Enhances amplitude and flexibility of tactile feedback across multiple vibration modes, providing a more nuanced and adjustable tactile experience.
Implementation Method 1
a piezoelectric layer, wherein 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
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AI summary
A tactile feedback apparatus and a driving method therefor, and an electronic device, relating to the technical field of tactile representation. The tactile feedback apparatus comprises a tactile feedback substrate (PNL) and a controller (CTR). The tactile feedback substrate (PNL) comprises a base substrate (BP), a first electrode layer (EP1), a piezoelectric layer (PE), and a second electrode layer (EP2) which are sequentially stacked; a plurality of electrode pairs (EE) which are sequentially arranged along the row direction are formed in the portion where the first electrode layer (EP1) and the second electrode layer (EP2) overlap with each other. The controller (CTR) is configured to be capable of determining one of a plurality of driving modes as a target driving mode, wherein in any driving mode, the electrode pairs (EE) are combined to form a plurality of driving units (DE) which are sequentially adjacent to each other, and each driving unit (DE) comprises electrode pairs (EE) that are adjacent to each other and having the same number; in different driving modes, the numbers of electrode pairs (EE) in the driving units (DE) are different. The controller (CTR) is further configured to drive one or more driving units (DE) in the target driving mode. According to the tactile feedback apparatus, the amplitudes under various different vibration modes can be increased.