Piezoelectric Element Orientation on Curved Panel for Compact Vibration Sound
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Solution Overview
Problem
Existing electronic devices with piezoelectric elements on the main surface of panels require additional space, leading to increased panel size, which is undesirable.
Innovation Solution
The piezoelectric element is attached to a curved or bent portion of the panel, positioned such that its virtual plane is not orthogonal to the panel's main surface, allowing for reduced panel size without compromising vibration transmission capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the piezoelectric element is attached to the main surface of the panel, then the vibration transmission function is achieved, but the panel size increases
Solution Approach 1:
The piezoelectric element is positioned at an angle to the main surface of the panel, specifically with the perpendicular line to the main surface and the virtual plane including the main surface of the piezoelectric element being non-orthogonal. This angular positioning allows the element to be placed in a different dimensional orientation, utilizing the thickness direction and angular space rather than only the planar surface area, thereby achieving vibration transmission without increasing the panel's footprint.
Solution Approach 2:
The panel includes a curved portion or bent portion, and the piezoelectric element is attached to this curved surface. The curvature of the panel surface allows the piezoelectric element to be positioned at an angle relative to the main surface while maintaining contact and vibration transmission functionality. This curved positioning enables space-efficient placement that reduces the overall panel size requirement.
2Area of stationary object
If the panel size is reduced, then the device becomes more compact, but the space for piezoelectric element placement is limited
Solution Approach 1:
By positioning the piezoelectric element at an angle to the main surface rather than parallel to it, the design utilizes the third dimension (thickness direction) and angular orientation to accommodate the element. This dimensional change allows compact panel sizes while providing sufficient placement space for the piezoelectric element through optimized spatial arrangement.
Solution Approach 2:
The invention changes the orientation parameter of the piezoelectric element from being parallel to the main surface to being at a non-orthogonal angle. This parameter change in positioning orientation allows the element to fit within smaller panel dimensions while maintaining proper attachment and vibration transmission capability.
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 reduces the size of the electronic device while maintaining effective vibration-based sound transmission, allowing for a more compact design without the need for additional sound emission openings.
Implementation Method 1
a piezoelectric element attached to the panel, wherein deformation of the piezoelectric element causes the panel to vibrate
Data Source
AI summary
An electronic device 1 includes: a panel 10; a housing 60 holding the panel 10; and a piezoelectric element 30 attached to the panel 10, wherein the deformation of the piezoelectric element 30 causes the panel 10 to vibrate, to transmit human body vibration sound to an object in contact with the panel 10, and the perpendicular line or normal to the main surface of the panel 10 and the surface of the piezoelectric element 30 attached to the panel 10 are not orthogonal to each other.