Display Panel Blocking Element for Front-Facing Sound Balance
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Solution Overview
Problem
Display devices often output high-frequency sounds towards the front and low-frequency sounds towards the rear, creating a disjointed audio experience for users.
Innovation Solution
Incorporating a blocking element with specific buffer layers and sound propagation coefficients to enhance sound output towards the front side of the display device, utilizing the display panel as a diaphragm for both low and high-frequency sounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a woofer is disposed on the rear surface of the display device to output low-frequency sound, then low-frequency sound can be outputted toward the rear side, but the user experiences disjointed audio presence compared to high-frequency sound outputted toward the front side
Solution Approach 1:
The display panel serves dual functions as both a visual display and a sound generation diaphragm. The blocking element is designed to serve multiple purposes: blocking harmful vibrations, managing acoustic pressure, and enabling unified sound output direction. This multi-functionality resolves the contradiction by improving sound quality through unified front-facing output while avoiding the complexity of separate front and rear speakers.
Solution Approach 2:
The blocking element extracts and isolates the sound generation function from the display panel's primary display function. By placing the blocking element between the sound generating device and display panel, it separates the acoustic management responsibilities while allowing the display panel to serve as the common diaphragm for both high and low-frequency sound output toward the front.
2Ease of operation
If the blocking element compresses the buffer layer to increase sound propagation coefficient, then sound pressure balance is improved, but the buffer layer density increases which may affect vibration control
Solution Approach 1:
The patent applies parameter changes by controlling the compression of the buffer layer to achieve optimal sound propagation coefficients. The blocking element is designed with specific structural parameters (thickness, material properties, compression ratio) that transform the buffer layer's physical state to balance sound pressure across frequencies while maintaining vibration control through carefully selected material and structural parameters.
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
Improves sound quality by achieving sound pressure balance across various frequency ranges, allowing both low and high-frequency sounds to be outputted towards the front, enhancing the overall audio experience.
Implementation Method 1
a first sound propagation coefficient value of the first buffer layer and a second sound propagation coefficient value of the second buffer layer satisfy the following Eq. (1): C1/C2 = cs2/cs1
Data Source
AI summary
A display device includes a display panel including a substrate including a first side extending in a first direction and a second side extending in a second direction intersecting the first direction, and a light emitting element layer positioned on a first surface of the substrate, a first vibrating element disposed on a second surface of the substrate and that vibrates the display panel to output a first sound, a first buffer layer disposed on the second surface of the substrate and disposed between the first side and the first vibrating element, and a second buffer layer disposed on the second surface of the substrate and disposed between the second side and the first vibrating element. The first buffer layer includes a first pore, and the second buffer layer includes a second pore.