Piezoelectric Device Multi-Layer Stacking Voltage Reduction
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Solution Overview
Problem
Existing haptic feedback technologies require high driving voltage due to the use of thicker piezoelectric layers to increase intensity, leading to inefficiencies and increased power consumption.
Innovation Solution
A piezoelectric device with alternately stacked electrode layers and piezoelectric layers, where odd-numbered electrode layers are electrically connected and even-numbered layers are insulated, allowing for parallel operation of multiple piezoelectric structures to achieve equivalent haptic feedback intensity with reduced driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If thicker piezoelectric layers are used to increase haptic feedback intensity, then the haptic feedback intensity is improved, but the driving voltage increases
Solution Approach 1:
The patent divides a single thick piezoelectric layer into multiple thinner piezoelectric layers (e.g., five layers) stacked in series. Each layer is separated by electrode layers, allowing the system to achieve the required total piezoelectric thickness for haptic feedback intensity while using thinner individual layers that require lower driving voltage. This segmentation resolves the contradiction by distributing the voltage requirement across multiple series-connected piezoelectric elements.
Solution Approach 2:
The patent transitions from a single-layer thick piezoelectric structure to a multi-layer stacked configuration, adding the dimension of layer stacking. By arranging piezoelectric layers in series along the thickness direction with intermediate electrode layers, the system achieves equivalent or enhanced haptic feedback intensity through cumulative effect while reducing the voltage requirement per layer. This dimensional reconfiguration allows intensity maintenance with voltage reduction.
2Force
If thicker piezoelectric layers are used to increase haptic feedback intensity, then the haptic feedback intensity is improved, but the power consumption increases
Solution Approach 1:
The patent segments the piezoelectric structure into multiple thinner layers connected in series, where each layer operates at a lower voltage. This segmentation reduces the total power consumption compared to a single thick layer requiring high voltage, while maintaining the cumulative haptic feedback intensity through the series arrangement of multiple piezoelectric elements.
Solution Approach 2:
The patent reconfigures the piezoelectric structure from a single thick layer to multiple thinner layers stacked in series, adding the dimension of layered arrangement. This dimensional change allows the system to achieve equivalent haptic feedback intensity through the cumulative effect of multiple layers while reducing power consumption by distributing the voltage requirement across series-connected elements.
3Use of energy by moving object
If multiple piezoelectric layers are stacked in parallel to reduce driving voltage, then the driving voltage is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the piezoelectric structure into multiple thin piezoelectric layers stacked in series, separated by electrode layers. This segmentation reduces the driving voltage required for each layer while maintaining the overall device functionality. The series arrangement of multiple piezoelectric elements with intermediate electrodes provides a systematic approach to voltage reduction that manages complexity through structured layering.
Solution Approach 2:
The patent transitions from a single-layer structure to a multi-layer stacked configuration, adding the dimension of vertical layering. By arranging piezoelectric layers in series along the thickness direction with intermediate electrode layers, the system achieves reduced driving voltage through the series connection configuration, managing device complexity through a systematic layered architecture.
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 reduces the driving voltage required for achieving the same haptic feedback intensity by allowing the piezoelectric layers to operate in parallel, effectively lowering the voltage needed while maintaining or enhancing the haptic feedback experience.
Implementation Method 1
a piezoelectric layer between every two adjacent electrode layers
Data Source
AI summary
A piezoelectric device, a vibration panel, and a haptic feedback device. The piezoelectric device includes: at least three electrode layers stacked alternately, and a piezoelectric layer located between every two adjacent electrode layers. For all the electrode layers, the electrode layers located on the odd-numbered layers are electrically connected to each other, the electrode layers located on the even-numbered layers are electrically connected to each other, and the electrode layers located on the odd-numbered layers are insulated from the electrode layers located on the even-numbered layers.