Wireless Earbud Charging Port Multiplexing for Box Communication
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Solution Overview
Problem
Current wireless earbuds require multiple connection points for charging and communication with charging boxes, leading to increased complexity and potential for signal interference.
Innovation Solution
A wireless earbud design that incorporates a charging port with a communication switching circuit, allowing for multiplexing of charging and communication functions at the charging port, reducing the number of contact points by switching between charging and communication modes based on voltage and signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate charging interface and communication interface are used, then charging and communication functions are independent and reliable, but the number of connection contacts increases and device complexity increases
Solution Approach 1:
The patent combines the charging interface and communication interface into a single charging port. The charging port is configured to be connected to an earbud charging voltage and receive/send communication signals, eliminating the need for separate interfaces and reducing the number of connection contacts while maintaining both functions
Solution Approach 2:
The charging port is designed to serve multiple functions: it can receive earbud charging voltage for power supply and simultaneously transmit/receive communication signals. This multi-functional design reduces the number of contacts needed while maintaining both charging and communication capabilities
2Device complexity
If multiplexing of charging and communication at charging port is implemented, then the number of contact points is reduced, but signal interference may occur between charging voltage and communication signals
Solution Approach 1:
The patent employs dynamic switching between charging mode and communication mode through control circuits. The communication switching circuit switches to off state when charging voltage is detected and to on state when communication signals are present, dynamically allocating the shared interface to prevent signal interference
Solution Approach 2:
The patent introduces control circuits including a communication switching circuit and charging on-off circuit as intermediaries between the charging port and the respective functional circuits. These switching circuits detect voltage and signal conditions to determine whether to connect the charging port to charging circuits or communication circuits, effectively mediating and preventing interference between the two functions
Data Source
AI summary
Disclosed is a wireless earbud, which includes: a charging port configured to be connected to an earbud charging voltage and receive/send a communication signal; a communication switching circuit including a first input/output terminal connected to the charging port and a second input/output terminal, the communication switching circuit is configured to switch to an off state when the charging port is connected to the earbud charging voltage, and switch to an on state when the charging port is connected to the communication signal; a communication on-off circuit connected to the second input/output terminal of the communication switching circuit; and an earbud control circuit configured to perform box entry detection on the wireless earbud and generate a corresponding detection signal to control the communication switching circuit to turn on/off an electrical connection between the earbud control circuit and the communication on-off circuit according to the detection signal.