Panel Speaker Actuator Insulation via Chassis Protrusion
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Solution Overview
Problem
The vibration actuator in display speakers can become shorted out with the display panel when it comes into contact with the back chassis, leading to reduced vibration and poor sound output.
Innovation Solution
A panel speaker design that includes a vibration actuator with a screw fastening mechanism and a back chassis with a protrusion, which reduces contact between the actuator and the chassis, ensuring electrical insulation and maintaining vibration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vibration actuator is mounted on the back surface of the display panel, then it is possible to transmit vibration to the display panel, but the vibration actuator may come into contact with the back chassis and become shorted out
Solution Approach 1:
The patent introduces a protrusion on the back chassis that serves as an intermediary structural element. This protrusion positions the back chassis away from the vibration actuator, creating a physical barrier that prevents direct contact while maintaining the compact overall structure. The protrusion acts as a mediator that resolves the spatial conflict between the vibration actuator and back chassis.
Solution Approach 2:
The patent solves the contact problem by utilizing the depth dimension (z-axis) rather than just the planar dimensions. By adding a protrusion that extends toward the vibration actuator in the depth direction, the design creates vertical separation between components that would otherwise contact in the planar view, effectively using dimensional thinking to avoid interference.
2Strength
If the back chassis is designed to cover the display speaker, then it provides structural support and protection, but it reduces the space available for the vibration actuator to operate without contact
Solution Approach 1:
The back chassis is segmented into different regions: a main body portion that provides structural support and coverage, and a protrusion portion that creates clearance. This segmentation allows the back chassis to simultaneously fulfill its structural support function while providing the necessary volume clearance for the vibration actuator through the protrusion structure.
Solution Approach 2:
The back chassis has non-uniform geometry with a protrusion in the specific region facing the vibration actuator. This local quality change (adding the protrusion) provides the necessary clearance volume locally where the vibration actuator operates, while the rest of the back chassis maintains its structural support and coverage functions.
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 design prevents electrical short-circuiting and enhances sound quality by minimizing contact between the vibration actuator and the back chassis, allowing for effective sound wave transmission and improved output.
Implementation Method 1
a vibration actuator 300 having first and second oppositely-facing surfaces, the first surface facing the panel... with a piezoelectric element
Data Source
AI summary
A panel speaker includes: a panel; a vibration actuator having first and second oppositely-facing surfaces, the first surface facing the panel; a screw that fastens the vibration actuator to the panel, the screw having a head that protrudes beyond the second surface of the vibration actuator; and a back chassis that faces the second surface of the vibration actuator. The back chassis has a protrusion protruding toward the vibration actuator in a portion of the back chassis that faces the head of the screw.