Electrostatic Sound Assembly for Directional Audio Focusing
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Solution Overview
Problem
Existing display devices require external sound assemblies, increasing costs and failing to meet the audiovisual needs of users in multiple scenarios.
Innovation Solution
A sound assembly with a carrier, first and second electrode structures, and a vibration diaphragm, where the electrode structures apply forces with different magnitudes and directions to the diaphragm to control sound direction and focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single directional sound assembly is used, then the device structure is simple, but it cannot satisfy audiovisual experience in multiple scenarios
Solution Approach 1:
The sound assembly is divided into multiple independent sound emission units (first sound assembly and second sound assembly) that can be controlled separately. Each unit has its own vibration diaphragm and electrode structure, allowing independent control of sound direction and timing to create immersive audiovisual experiences.
Solution Approach 2:
The patent introduces spatial dimensionality by positioning sound emission units at different locations and orientations. The first sound assembly emits sound in a first direction while the second sound assembly emits in a second direction, creating a multi-dimensional sound field that enhances adaptability across various viewing angles and scenarios.
2Power
If external sound assembly is connected to display device, then sound output capability is improved, but device cost increases
Solution Approach 1:
The sound assembly is merged with the display device structure, with sound emission units integrated into the display panel itself. The vibration diaphragms are positioned within the display device housing, eliminating the need for separate external sound boxes and reducing overall device complexity and cost.
Solution Approach 2:
The display device serves dual functions: visual display and sound emission. The same device structure that displays images also houses the sound emission units, making the device universal for both functions and eliminating the need for separate dedicated sound equipment.
3Ease of operation
If electrode structures apply forces with different magnitudes and directions to the diaphragm, then sound direction control is improved, but manufacturing precision requirements increase
Solution Approach 1:
Different regions of the vibration diaphragm are associated with different electrode structures that apply forces with different magnitudes and directions. The first electrode structure applies a first force while the second electrode structure applies a second force, creating localized control zones that enable precise sound directionality without requiring uniform precision across the entire device.
Solution Approach 2:
The system uses dynamic control of electrode forces to adjust sound direction in real-time. By varying the magnitude and direction of forces applied by the electrode structures, the sound emission direction can be dynamically adjusted without requiring fixed precision in the manufacturing process.
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
Enhances audio experience by directing sound to a specific focus point, improving user interaction with display devices.
Implementation Method 1
The first electrode structure and the second electrode structure are configured to cooperate with each other to provide a first force that acts on a first end of the vibration diaphragm and a second force that acts on a second end of the vibration diaphragm
Data Source
AI summary
A sound assembly includes a carrier, a first electrode structure, a second electrode structure, and a vibration diaphragm. The first electrode structure is arranged on one side of the carrier. The second electrode structure is arranged facing and insulated from the first electrode structure. The vibration diaphragm is arranged on one side of the second electrode structure that faces away from the first electrode structure. The first electrode structure and the second electrode structure are configured to cooperate with each other to provide a first force that acts on a first end of the vibration diaphragm and a second force that acts on a second end of the vibration diaphragm. Magnitudes and/or acting directions of the first force and the second force are different.