Asymmetric Subwoofer Crossover Frequency Selection for Slim Displays
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Solution Overview
Problem
Conventional 2.1 speaker systems integrated into electronic displays face challenges in reproducing low-frequency audio due to slim profile constraints, leading to unbalanced stereo output and directionality issues, as a conventionally sized subwoofer requires a large enclosure.
Innovation Solution
The system selects a crossover frequency based on the subwoofer's position relative to the enclosure's center axis, using digital or analog crossover networks to configure speakers and subwoofer to reproduce frequencies above and below the crossover frequency, respectively, and adjusts based on user proximity and application context to achieve balanced and omni-directional output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventionally sized subwoofer is used to reproduce low-frequency audio, then audio quality is improved, but the enclosure size increases which conflicts with slim profile constraints
Solution Approach 1:
The patent changes the operating parameters of the subwoofer by selecting an optimal crossover frequency based on the subwoofer's position relative to the center axis. This allows a smaller subwoofer to achieve acceptable low-frequency reproduction by operating in an optimized frequency range rather than attempting to reproduce all low frequencies with an oversized driver.
Solution Approach 2:
The system dynamically adjusts the crossover frequency based on the subwoofer's position and operating conditions. This dynamic parameter adjustment allows the compact subwoofer to maintain optimal performance across different scenarios, effectively resolving the contradiction between size and audio quality without requiring a fixed large enclosure.
2Volume of moving object
If the subwoofer is positioned asymmetrically to fit slim profile constraints, then enclosure size is reduced, but stereo balance and omni-directional output are degraded
Solution Approach 1:
The patent compensates for asymmetric positioning by dynamically adjusting the crossover frequency parameter. When the subwoofer is positioned off-center, the system selects a crossover frequency that accounts for this asymmetry, thereby maintaining balanced stereo output and omni-directional bass response despite the compact asymmetric enclosure design.
3Device complexity
If crossover frequency is fixed, then system complexity is reduced, but audio quality and adaptability to different user positions are degraded
Solution Approach 1:
The system implements dynamic crossover frequency selection that adapts to the subwoofer's position and user proximity. This dynamic approach maintains high audio quality across different scenarios while keeping the control logic relatively simple - the system automatically selects from predefined crossover frequencies based on detected conditions, avoiding the need for complex real-time calculation while still achieving adaptability.
Data Source
AI summary
Systems and methods for selecting crossover frequencies for 2.1 speaker systems integrated into electronic displays are described. In an embodiment, an electronic display may include: a left speaker coupled to a left side of an enclosure, a right speaker coupled to a right side of the enclosure, and a subwoofer coupled to the left or right side of the enclosure. In another embodiment, a method may include: determining a position of an asymmetric subwoofer integrated into a display, and selecting a crossover frequency between the asymmetric subwoofer and a set of stereo speakers integrated into the display based, at least in part, upon the position.