Acoustic Wave Transmitting Structure for High-Intensity Display Sound
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Solution Overview
Problem
Existing display devices face challenges in maintaining high sound intensity due to interference and loss of acoustic waves during transmission through materials with mismatched acoustic impedances.
Innovation Solution
The acoustic wave transmitting structure comprises a first layer, a second layer, and an intermediate layer with specific acoustic impedance ratios, ensuring (Z1+Z2)/6.8≤Z3≤(Z1+Z2)/0.6, to minimize sound intensity loss and maintain high sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If acoustic waves are transmitted through display panel materials, then sound components can be integrated into display devices, but sound intensity is reduced due to acoustic impedance mismatch
Solution Approach 1:
An intermediate layer is introduced between the first layer (acoustic wave generator side) and the second layer (display panel side). This intermediate layer has an acoustic impedance Z3 that satisfies (Z1+Z2)/6.8≤Z3≤(Z1+Z2)/0.6, serving as an acoustic impedance bridge to reduce reflection and transmission loss at the interface, thereby maintaining high sound intensity while enabling integration of sound components into the display device.
2Manufacturing precision
If display quality is improved with larger size and higher resolution, then consumer requirements are met, but acoustic wave transmission is interfered with by the display elements
Solution Approach 1:
The acoustic wave transmitting structure is designed with spatially varying properties: the intermediate layer is positioned specifically between the acoustic wave generator and the display elements, allowing acoustic waves to pass through with minimal interference. This localized optimization enables the display elements to maintain high resolution and quality while the intermediate layer compensates for acoustic impedance mismatch in the critical transmission path.
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 structure effectively maintains high sound intensity by optimizing acoustic impedance compatibility between layers, ensuring the second sound intensity is at least 50% to 100% of the initial sound intensity emitted by the acoustic wave generator.
Implementation Method 1
The intermediate layer is disposed between the first layer and the second layer, and has a third acoustic impedance Z3. Z1, Z2, and Z3 satisfy a relation: (Z1+Z2)/6.8≤Z3≤(Z1+Z2)/0.6
Data Source
AI summary
An acoustic wave transmitting structure and a display device are provided. The acoustic wave transmitting structure includes a first layer, a second layer, and an intermediate layer. The first layer has a first acoustic impedance Z1. The second layer has a second acoustic impedance Z2. The intermediate layer is disposed between the first layer and the second layer, and has a third acoustic impedance Z3. Z1, Z2, and Z3 satisfy a relation: (Z1+Z2)/6.8≤Z3≤(Z1+Z2)/0.6. The display device includes a display panel and an acoustic wave generator. The display panel has a substrate. A plurality of display elements are disposed on one side of the substrate. The acoustic wave generator is disposed on the other side of the substrate of the display panel through the acoustic wave transmitting structure. The other side of the substrate is opposite to the one side of the substrate.