Display Panel Sound Output via Exciter and Passive Radiator
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Solution Overview
Problem
Conventional electronic apparatuses require separate speakers to produce sound, which occupy space and restrict design and arrangement, especially in flat display panel technology where sound is output through vibration of the display panel.
Innovation Solution
An electronic apparatus is designed with a display panel, a rear cover, an exciter, and a passive element, where the exciter vibrates the display panel to produce sound, and the passive element, such as a passive radiator or duct, enhances the sound output in directions different from the image display, achieving three-dimensional sound without a separate speaker unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate speaker is used to output sound, then sound quality is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent merges the speaker function with the display panel by using the display panel itself as the vibrating element that generates sound. The exciter unit vibrates the display panel to produce sound waves, eliminating the need for a separate speaker component and reducing device complexity while maintaining sound output functionality.
Solution Approach 2:
The display panel is given dual functionality: it serves both as the visual display interface and as the acoustic sound source. By making the display panel universal for both image display and sound generation, the patent eliminates the need for separate dedicated speaker components.
2Reliability
If a separate speaker is used to output sound, then sound quality is improved, but space occupation increases
Solution Approach 1:
The patent merges the speaker function with the display panel by using the display panel itself as the vibrating element that generates sound. The exciter unit vibrates the display panel to produce sound waves, eliminating the need for a separate speaker component and reducing device complexity while maintaining sound output functionality.
Solution Approach 2:
The patent utilizes the thickness dimension of the display panel to create an air cavity space for sound wave generation and transmission. By vibrating the display panel in the thickness direction and utilizing the air cavity, the system achieves three-dimensional sound output without requiring additional external speaker components.
3Device complexity
If sound is output through display panel vibration only in the thickness direction, then device complexity is reduced, but sound spatial distribution is limited
Solution Approach 1:
The patent utilizes the thickness dimension of the display panel to create an air cavity space for sound wave generation and transmission. By vibrating the display panel in the thickness direction and utilizing the air cavity, the system achieves three-dimensional sound output without requiring additional external speaker components.
Solution Approach 2:
The patent divides the sound output function into multiple components: the exciter unit that generates vibrations, the display panel that transmits vibrations, the air cavity that amplifies and directs sound waves, and the passive radiator that enhances low-frequency sound. This segmentation allows each component to specialize in specific aspects of sound generation, achieving comprehensive spatial sound distribution.
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 electronic apparatus effectively outputs sound in multiple directions, including upward and lateral directions, creating a three-dimensional sound experience without the need for a separate speaker unit, thus enhancing immersion and reducing spatial constraints.
Implementation Method 1
an exciter including a vibrator disposed in the inner space to vibrate the display panel
Implementation Method 2
the passive element may be a passive radiator vibrated by an air vibrating in the inner space
Implementation Method 3
the passive element may be a duct. a duct opening may be defined through the duct
Data Source
AI summary
An electronic apparatus includes a display panel including a first surface through which an image is displayed and a second surface opposite to the first surface, a rear cover including a rear surface portion spaced apart from the display panel with an inner space interposed therebetween and a sidewall portion connected to the rear surface portion and surrounding the inner space, an exciter including a vibrator disposed in the inner space to vibrate the display panel and a supporter fixed to the rear surface portion, and a passive element outputting a sound. A reinforcement opening is defined in the sidewall portion, the exciter overlaps the reinforcement opening in a direction penetrating through the reinforcement opening, and the passive element is disposed in the reinforcement opening.