Vibration Type Touch-Sensing Panel Matrix Actuation
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Solution Overview
Problem
Conventional touch-sensing display panels cannot generate local vibrations perceivable by the human body, as existing methods using electric motors or piezoelectrical materials are limited in intensity and cannot produce vibrations greater than 30 μm, failing to meet user demands for both overall and local vibrations.
Innovation Solution
A vibration type touch-sensing panel comprising a substrate with a matrix of vibration units, each consisting of a first electrode layer, a second electrode layer, and an electret layer, where a control module applies driving voltages to generate relative vibrations, and a switching unit transmits driving and sensing signals to enable selective generation of overall or local vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional piezoelectrical materials (PVDF or PZT) are used as actuators to generate vibration, then the touch-sensing display panel can generate vibrations, but the vibration intensity is insufficient (cannot exceed 30 μm) and not perceivable by human body
Solution Approach 1:
The patent segments the actuator into multiple independent piezoelectric elements arranged in a matrix pattern, where each element corresponds to a specific region of the display panel. This segmentation allows selective activation of individual elements or groups of elements to generate local vibrations with sufficient intensity in specific areas, while maintaining the overall structural integrity of the display panel.
Solution Approach 2:
The patent applies local quality by enabling different regions of the display panel to have different vibration characteristics. Each piezoelectric element can be independently controlled to generate vibrations with specific amplitude and frequency, allowing the system to provide locally perceivable vibrations (greater than 30 μm) in targeted areas while keeping other areas static or differently activated.
2Adaptability or versatility
If electric motors or piezoelectrical materials are coupled with the touch-sensing display panel to generate vibrations, then overall vibrations can be generated, but local vibrations cannot be generated
Solution Approach 1:
The patent implements multi-functionality by designing a single actuator system that can perform both overall vibration and local vibration functions. The matrix arrangement of piezoelectric elements, controlled by a switching unit, allows the system to activate all elements simultaneously for overall vibrations or select specific elements for local vibrations, making one system capable of multiple vibration modes.
Solution Approach 2:
The patent applies dynamics by enabling the actuator system to dynamically reconfigure its operation mode. The switching unit can dynamically select which piezoelectric elements to activate based on the required vibration type, transitioning between overall vibration mode (all elements active) and local vibration mode (specific elements active), providing adaptive versatility without physical reconfiguration.
3Adaptability or versatility
If separate piezoelectrical materials are arranged into a matrix with each corresponding to a different portion of the touch-sensing display panel, then local vibrations can be generated, but the vibration intensity remains insufficient
Solution Approach 1:
The patent combines multiple piezoelectric elements that can be selectively activated. By merging the capabilities of individual elements through a common control system (switching unit), the system achieves both local vibration capability (by activating specific elements) and sufficient vibration intensity (by coordinating the combined output of multiple elements when needed).
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 allows for the generation of vibrations with varying intensities, enabling both overall and local vibrations perceivable by the human body, addressing the limitations of existing technologies by providing a more effective means to produce vibrations of greater intensity.
Implementation Method 1
the control module provides a driving voltage between the first electrode layer and the second electrode layer so that the electret layer and one of the first electrode layer and the second electrode layer can generate a relative vibration
Data Source
AI summary
A vibration type touch-sensing panel includes a substrate, a plurality of vibration units, and a control module, wherein the vibration units are disposed on the substrate to form a matrix. Each one of the vibration units includes a first electrode layer, a second electrode layer, and an electret layer, wherein the first electrode layer is disposed on the substrate. The electret layer is disposed between the first electrode layer and the second electrode layer and located on one of the first electrode layer and the second electrode layer. The control module provides a driving voltage between the first electrode layer and the second electrode layer so that the electret layer and one of the first electrode layer and the second electrode layer generate a relative vibration.