Speaker Enclosure Using Display Cavity Back-Volume
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Solution Overview
Problem
Current wireless devices face challenges in speaker performance due to inadequate back-volume, which restricts the movement of the speaker's cone, affecting frequency response and efficiency, and existing solutions require complex sealing geometries and increased device size.
Innovation Solution
An enclosure for the speaker is created using the space between the transparent cover and the display, with sealing material forming the walls of the enclosure, providing a back-volume without the need for additional volume or complex sealing, utilizing dust and acoustic sealing materials like silicon or thermoplastic elastomer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a back-volume is provided by placing the speaker in an enclosure, then speaker performance is improved, but device thickness increases
Solution Approach 1:
The patent merges the back-volume enclosure with the device's existing internal structure by utilizing the cavity formed between the display and the back cover. The sealing structure integrates with the display assembly and back cover, combining the speaker enclosure function with the device's structural framework, thereby avoiding additional thickness while providing adequate back-volume for speaker performance
Solution Approach 2:
The patent redistributes the back-volume space along the thickness dimension by optimizing the cavity height between the display and back cover. Instead of increasing overall device thickness, the solution utilizes the available vertical space within the existing device profile, effectively using another dimensional approach to accommodate the required volume
2Length of stationary object
If existing cavities are used as back-volume, then device size is maintained, but sealing complexity increases
Solution Approach 1:
The sealing structure serves multiple functions simultaneously: it seals the back-volume cavity, provides structural support for the speaker assembly, and integrates with the display and back cover components. This multi-functionality eliminates the need for separate dedicated sealing components, reducing overall complexity while maintaining device size constraints
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 solution maintains the device's thickness, eliminates the need for additional sealing, reduces costs, and ensures adequate back-volume for improved speaker performance without increasing the device's size.
Implementation Method 1
sealing material forming the walls of the enclosure... utilizing dust and acoustic sealing materials like silicon or thermoplastic elastomer
Data Source
AI summary
An enclosure for a magnetic speaker of a wireless device is provided. The wireless device has a display mounted in a case and a transparent cover mounted over at least the display. The enclosure comprises: an upper surface of the display at least partially spaced from a lower surface of the transparent cover to form at least a portion of an enclosed back-volume formed within the case for the magnetic speaker, the magnetic speaker being mounted proximate to the enclosed back-volume, and at least one of the transparent cover and the case having an opening formed therein for emitting sound from the magnetic speaker.