Accessory Power Mode Switching for Single Connector Audio and Charging
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Solution Overview
Problem
Existing wireless devices face challenges in simultaneously using a single connector for both audio and charging functions without disrupting power supply, especially during calls when the user equipment's USB connector is occupied by a headset.
Innovation Solution
A method where an accessory, such as a headset, detects the coupling of a charger and sends an indication to the user equipment to change power modes, allowing power to flow from the charger to the user equipment via a digital interface, using a USB connector for both charging and audio operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single USB connector is used for both audio and charging functions, then device complexity is reduced and ease of operation is improved, but power supply disruption occurs during calls when the connector is occupied by a headset
Solution Approach 1:
The system dynamically switches the USB connector's functional mode between audio data transmission and power reception based on real-time detection of charger connection status. The accessory controller detects when a charger is connected and signals the host device to switch from audio mode to power reception mode, allowing the same physical connector to adapt its function dynamically without hardware changes.
Solution Approach 2:
The system changes the operational parameters of the USB connector by switching between different power modes (power source mode and power sink mode) and data modes (audio mode and charging mode). This parameter switching enables the connector to serve multiple functions sequentially, resolving the conflict between using a single connector for both audio and charging while maintaining power supply reliability.
2Ease of operation
If the USB connector is used for audio transmission during calls, then ease of operation is improved, but charging function cannot be performed simultaneously
Solution Approach 1:
The system implements periodic switching between audio mode and charging mode based on the connection status of the charger. When a charger is detected, the system periodically transitions from audio transmission to power reception and back, allowing both functions to be performed sequentially through the same connector without requiring simultaneous hardware support for both operations.
3Adaptability or versatility
If power mode switching is implemented, then adaptability is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The accessory includes a controller that continuously monitors the connection status of the charger and provides feedback signals to the host device. When the controller detects a charger connection, it sends a signal to the host's USB controller to switch from audio mode to power reception mode. This feedback mechanism enables automatic mode switching without requiring complex user intervention or additional hardware controls.
Solution Approach 2:
The system performs automatic mode switching based on the detected connection status without requiring manual user input. The accessory controller autonomously detects when a charger is connected and initiates the power mode switch, and similarly autonomously switches back to audio mode when the charger is disconnected, reducing the need for additional control mechanisms.
Data Source
AI summary
Methods and apparatus, including computer program products, are provided for charging and audio usage. In one aspect there is provided a method, which may include detecting, by an accessory including a first connector and a second connector configured to enable coupling to a user equipment, a charger being coupled to the first connector; sending, based on at least the detected charger, an indication to the user equipment to change to a power receive mode; detecting, by the accessory, the change to the power receive mode; and allowing, based on at least the detected change, power to flow from the first connector to the second connector. Related systems, apparatus, and articles of manufacture are also disclosed.