In-Ceiling Smart Speaker Power Conversion Over Existing Speaker Wires
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Solution Overview
Problem
Existing smart devices require additional high voltage lines for power supply, which is inconvenient and unsightly, especially when hidden in ceilings or walls, and there is a need to convert AC power to low voltage for seamless integration with existing low voltage conductors.
Innovation Solution
A system that translates AC power from outlets or DIN rails into DC voltage over existing speaker wires, allowing smart devices to be powered using USB-C and housed within existing speaker enclosures, enabling interaction and concealment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If smart devices are hidden in ceiling or wall openings for aesthetic purposes, then the visual appearance is improved, but access for interaction and maintenance becomes difficult
Solution Approach 1:
The system separates the smart device into two functional parts: the main processing unit housed within the ceiling/wall opening for aesthetic purposes, and the audio output components (speakers, microphones) extending through the opening for interaction. This segmentation allows the device to be both hidden and accessible simultaneously.
Solution Approach 2:
The smart device is nested within the existing speaker enclosure structure, utilizing the cavity space for housing electronic components while maintaining the external appearance of a standard speaker grille for user interaction.
2Reliability
If additional high voltage lines are installed to power smart devices, then reliable power supply is improved, but installation complexity and visual clutter increase
Solution Approach 1:
The existing speaker wire infrastructure is repurposed to serve dual functions: audio signal transmission and power delivery. By integrating a power conversion unit that transforms high voltage AC to low voltage DC, the system eliminates the need for separate power wiring while maintaining reliable power supply to smart devices.
Solution Approach 2:
A power conversion unit acts as an intermediary device installed at the ceiling/wall opening location. This unit receives high voltage AC power through existing speaker wires, converts it to low voltage DC, and delivers it to the smart device, thereby eliminating the need to run new high voltage lines throughout the environment.
3Ease of operation
If smart devices are placed on tabletop surfaces for easy access, then ease of operation is improved, but aesthetic appearance and space utilization deteriorate
Solution Approach 1:
The system transitions the device location from horizontal surface (tabletop) to vertical integration (ceiling/wall structure), utilizing the third dimension of building architecture. This allows the device to be accessible through the speaker opening while maintaining clean visual lines in the room.
4Ease of manufacture
If existing speaker wire infrastructure is utilized for power delivery, then installation simplicity is improved, but power delivery capability deteriorates due to low voltage limitations
Solution Approach 1:
The system changes the electrical parameters of the power delivery system by introducing a voltage conversion stage. The power conversion unit transforms high voltage AC (suitable for long-distance transmission through speaker wires) to low voltage DC (suitable for smart device operation), thereby maintaining both installation simplicity and adequate power delivery capability.
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
Enables smart devices to be powered and integrated seamlessly within existing in-wall or in-ceiling speaker openings without the need for new high voltage lines, providing a clean and hidden installation solution.
Implementation Method 1
capturing AC power from an outlet or DIN rail-like source, translate into DC voltage over existing speaker wire
Data Source
AI summary
A speaker system, including an enclosure, a speaker positioned in the enclosure, an AC voltage source, a step-down voltage converter operationally connected to the AC voltage source, an AC to DC converter operationally connected to the step-down voltage converter, and a USB power delivery controller operationally connected to the AC to DC converter. The USB power delivery controller is operationally connected to the speaker.