Display Panel Vibration Control for Sound Pressure Intensity
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Solution Overview
Problem
Conventional display apparatuses with built-in speakers often have limited sound output characteristics, particularly in the lower register, due to the small size of the vibration plate compared to the display panel, resulting in inadequate sound pressure intensity.
Innovation Solution
Incorporating a vibration member attached to the display panel, a vibration control plate, and a damping member to transfer vibrations and control frequency, allowing the display panel to function as a vibration plate, thereby enhancing sound output characteristics by increasing sound pressure intensity and improving lower register sound output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional built-in speaker with a small vibration plate is used, then the device structure remains simple and compact, but the sound pressure intensity and lower register sound output are insufficient
Solution Approach 1:
The display panel is designed to serve dual functions: displaying images and acting as a vibration plate for sound output. By making the display panel itself capable of vibration, the invention eliminates the need for a separate small vibration plate, thereby increasing the effective vibration area and improving sound pressure intensity while maintaining device compactness
Solution Approach 2:
The invention merges the display panel and vibration plate into a single integrated component. The display panel is coupled to the vibration member through a vibration control plate, allowing the display panel to function both as the visual display surface and as the acoustic vibration surface, thus resolving the contradiction between device compactness and sound output capability
2Ease of operation
If the vibration plate area is increased to improve sound output, then sound pressure intensity improves, but the device size and complexity increase
Solution Approach 1:
The display panel serves multiple functions simultaneously - as the visual display interface and as the acoustic vibration plate. This multi-functionality allows the system to achieve improved sound output characteristics without adding separate dedicated components, thereby avoiding increased device complexity
Solution Approach 2:
The display panel itself performs the vibration function needed for sound output. By utilizing the display panel's own structure and material properties to generate vibrations, the system eliminates the need for additional dedicated vibration generation components, maintaining structural simplicity while improving sound output
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 significantly improves sound pressure intensity and output characteristics in the lower register by utilizing the display panel as a vibration plate, achieving better sound quality through controlled vibration transfer and absorption.
Implementation Method 1
the vibration member may include a piezoelectric element, a polyvinylidene fluoride ('PVDF'), an electro active polymer or a combination thereof
Implementation Method 2
the damping member absorbs the vibration of the display panel
Implementation Method 3
the vibration control plate controls a vibration frequency of the vibration transferred to the display panel from the vibration member
Data Source
AI summary
A display apparatus includes a display panel which displays an image and a vibration member attached to a surface of the display panel, where the vibration member receives a sound signal, generates a vibration in response to the sound signal, and transfers the vibration to the display panel to allow the display panel to output a sound.