Wireless Headphone Charging Link for Two-Way Base Communication
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Solution Overview
Problem
Existing wireless headphones and bases with a three-wire design can only support single-wire half-duplex communication when the headphone is charged, limiting two-way communication capabilities due to structural limitations and conflicts in TXD wire connections.
Innovation Solution
Incorporating a base transistor and pull-up resistors in both the base and wireless headphone systems to separate TXD wires, allowing for two-way communication by configuring OC gates and ensuring proper voltage levels, thereby enabling two-way communication without increasing the number of contacts or using STM chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If three-wire design is used for charging connection, then charging function is achieved, but two-way communication cannot be implemented when headphone is charged
Solution Approach 1:
The patent segments the communication function by introducing separate TXD and RXD wires within the charging connection structure. The three-wire design (VCC, GND, LINK) is enhanced with internal differentiation where LINK connects to both TXD and RXD through transistors, allowing independent transmit and receive paths while maintaining the external three-wire simplicity.
Solution Approach 2:
The patent uses transistors as intermediary components to enable bidirectional communication through the single LINK wire. The transistor switches allow the LINK wire to function as both TXD and RXD at different times, mediating between the charging connection requirement and the communication requirement without needing separate dedicated wires for each function.
2Reliability
If TXD wires are directly connected for communication, then communication is established, but conflict and overload occur preventing reliable communication
Solution Approach 1:
The patent introduces transistors as intermediary components between the TXD wires of the base and headphone. These transistors act as switches that prevent direct connection conflicts by controlling when each side can transmit, eliminating the overload problem that would occur with direct TXD wire connection while maintaining communication functionality.
Solution Approach 2:
The patent implements dynamic switching of the communication paths using transistors controlled by control signals. The communication direction changes dynamically - when base needs to communicate with headphone, base transistor conducts; when headphone needs to communicate with base, headphone transistor conducts. This dynamic switching prevents conflicts while enabling two-way communication.
Data Source
AI summary
A wireless headphone system, a wireless headphone, and a base. The wireless headphone system includes the wireless headphone and the base. The base includes a base RXD wire, a base TXD wire, a base connection wire, and a base triode; and the wireless headphone includes a wireless headphone RXD wire, a wireless headphone TXD wire, a wireless headphone connection wire, and a wireless headphone transistor. The base RXD wire and the base TXD wire are connected together through the base transistor and led out through the base connection wire. The wireless headphone RXD wire and the wireless headphone TXD wire are connected together through the wireless headphone transistor and led out through the wireless headphone connection wire. When the headphone is charged on the base, two-way communication between the headphone and the base can still be implemented while maintaining the existing three-wire design.