Display Frame Acoustic Layout for Thin Portable Electronics
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Solution Overview
Problem
Existing electro-optical devices in portable electronic apparatuses face challenges in reducing size and thickness due to the separate mounting of display and sound-production units, which restricts acoustic design and optical optimization, and often result in increased thickness or size when trying to minimize these dimensions.
Innovation Solution
An electro-optical device design that integrates a holding frame for the electro-optical panel and a sound-production frame with a sound-production air space at the rear, featuring an internal sound-guiding path to efficiently emit sound waves, allowing independent acoustic design and reducing the influence of internal structure on sound production, while maintaining compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the display section and sound-production section are disposed to overlap each other to reduce case thickness, then the thickness of the case is reduced, but the size of the apparatus is inevitably increased
Solution Approach 1:
The sound-production unit is positioned in the backlight case, utilizing the depth dimension of the apparatus rather than expanding the front area. This allows the display and sound-production sections to overlap in the front view while maintaining compact apparatus size by using the rear depth space for acoustic functions
2Ease of manufacture
If the sound-production unit is disposed in the electronic apparatus, then acoustic design can be performed, but the design of the case may be restricted and sufficient reduction in size or thickness cannot be achieved
Solution Approach 1:
The apparatus is divided into functionally independent sections: the display section with its holding frame and the sound-production section with its dedicated air space. This segmentation allows acoustic design to be performed independently in the sound-production unit without restricting the overall case design, as each section can be optimized for its specific function
3Volume of moving object
If the speaker is disposed in the backlight case, then compactness is achieved, but the sound-production space of the speaker is restricted by the structure of the backlight case and optimum acoustic design is difficult to perform
Solution Approach 1:
A dedicated sound-production air space is created within the backlight case, providing a localized environment optimized for acoustic performance. This separate air space allows the speaker to be positioned compactly in the backlight case while maintaining sufficient sound-production space and acoustic design freedom through the dedicated air chamber
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
This design enables a compact electro-optical device with improved acoustic design freedom, reducing the influence of internal structure on sound and allowing for efficient sound emission, thereby enhancing the design flexibility and usability of portable electronic apparatuses.
Implementation Method 1
a piezoelectric sound-production unit is used in which a piezoelectric vibrating body formed by laminating a vibration plate, and the piezoelectric body is fixed to the case
Data Source
AI summary
An electro-optical device includes an electro-optical panel, a holding frame that holds the electro-optical panel, and a sound-production frame that is attached to the holding frame, constitutes a sound-production air space at the rear of the holding frame, and holds a sound-production unit. The holding frame is provided with an internal sound-guiding path that is connected to the inside of the sound-production air space and opens to the outside.