Charging Case Pin Multiplexing for Wireless Earphone Data
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Solution Overview
Problem
Conventional wireless earphones and charging cases face challenges in implementing charging and communication functions efficiently, leading to high development complexity, material costs, and poor stability due to the need for specialized chips or processors.
Innovation Solution
A communication control method and system that utilize a single-pole double-throw switch and level conversion circuits to transmit data between the charging case and wireless earphones through power supply pins, eliminating the need for additional communication chips and improving stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a special communication chip is provided for charging and communication functions, then communication reliability is improved, but device complexity and material cost increase
Solution Approach 1:
The patent applies multi-functionality by enabling the power supply pins to serve dual purposes: both power delivery and data communication. The charging case and wireless earphone use the same physical connection pins for both charging and bidirectional communication, eliminating the need for separate communication chips and reducing overall device complexity while maintaining communication reliability
Solution Approach 2:
The patent merges the power supply function and communication function into a single integrated system. By combining power transmission and data transmission through the same pin connections and using a unified communication protocol, the system reduces component count and simplifies the overall architecture without compromising communication reliability
2Adaptability or versatility
If a special CPLD or processor controlling an external switch is adopted, then communication control capability is improved, but device complexity and material cost increase
Solution Approach 1:
The patent implements self-service by enabling the wireless earphone to automatically detect communication requirements and initiate communication protocols without external processor intervention. The earphone autonomously manages the communication state by detecting voltage levels and switching between power-only and power-plus-communication modes, reducing the need for complex external control circuits
Solution Approach 2:
The patent applies dynamics by implementing a variable communication mode that adapts based on real-time conditions. The system dynamically switches between different operational states (power only, power plus communication, full communication) depending on the detected voltage levels and communication requirements, providing flexible control without needing complex fixed-architecture processors
3Ease of manufacture
If 2-pin contacts are used for charging and communication, then ease of manufacture is improved, but communication stability deteriorates
Solution Approach 1:
The patent applies parameter changes by utilizing voltage level variations as a communication medium. By detecting different voltage levels (such as 3.7V indicating charging completion) and using these voltage parameters to encode communication states, the system achieves stable communication through simple 2-pin contacts without requiring complex signaling protocols or additional pins
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 approach simplifies the charging and communication process, reduces material costs, and enhances product stability by enabling efficient data transmission between the charging case and wireless earphones using basic circuits.
Implementation Method 1
controlling a first single-pole double-throw switch to connect the first power supply pin with a first TxRx and level conversion circuit, sequentially transmitting a predetermined start code and the first to-be-transmitted data to the first wireless earphone through the first power supply pin
Implementation Method 2
controlling a first single-pole double-throw switch to connect the first power supply pin with a first TxRx and level conversion circuit
Data Source
AI summary
Disclosed are a communication control method, apparatus and system, and a charging case and a wireless earphone. The method includes: acquiring, when a charging case is connected with a first wireless earphone though a first power supply pin and a second power supply pin, first to-be-transmitted data if the charging case is to communicate with the first wireless earphone; and controlling a first single-pole double-throw switch to connect the first power supply pin with a first TxRx and level conversion circuit, sequentially transmitting a predetermined start code and the first to-be-transmitted data to the first wireless earphone through the first power supply pin, where the first wireless earphone controls a first predetermined charging pin to be connected with a second TxRx and level conversion circuit based on the predetermined start code, and receives the first to-be-transmitted data.