Mobile Terminal Quick Charging Handshake via D+ Line
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Solution Overview
Problem
The existing quick charging technology faces challenges in optimizing the handshake negotiation process between charging adapters and mobile terminals, leading to inefficiencies in determining when and how to initiate quick charging, which affects charging speed and reliability.
Innovation Solution
The method involves the mobile terminal identifying the charging device type through level signals and initiating a handshake request on the D+ data line to determine quick charging support, allowing for seamless switching to the quick charging mode without conflicting with the D-data line, ensuring accurate and efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the adapter initiates the handshake negotiation process for quick charging, then the charging speed can be increased, but it is difficult to define the certain condition for initiating the handshake, leading to uncertainty and potential delays in the charging process
Solution Approach 1:
The patent inverts the traditional handshake initiation role from the adapter to the mobile terminal. The mobile terminal detects the adapter type first, then actively initiates the handshake negotiation process. This inversion resolves the uncertainty by making the terminal (which has clear knowledge of its own charging capabilities) the active party, eliminating the ambiguity of when the adapter should initiate the handshake.
Solution Approach 2:
The mobile terminal performs preliminary detection of the adapter type through level signals before initiating the handshake negotiation. This preliminary action allows the terminal to prepare the handshake request in advance with accurate adapter type information, reducing the overall negotiation time and ensuring the handshake is initiated at the optimal moment.
2Measurement precision
If the mobile terminal uses the D-data line for communication, then it can identify the charging device type, but it cannot simultaneously use the same line for handshake negotiation, causing potential conflicts and delays
Solution Approach 1:
The patent segments the communication functions by assigning different data lines for different purposes. The D-data line is dedicated for adapter type identification through level signals, while the D+ data line is used for handshake negotiation. This segmentation eliminates signal conflicts and allows both functions to operate simultaneously without interference, improving overall charging setup efficiency.
3Loss of time
If the handshake negotiation process is optimized to reduce time, then charging speed improves, but reliability may be compromised if the negotiation process is too streamlined
Solution Approach 1:
The patent implements a feedback mechanism where the mobile terminal detects adapter type through level signals, uses this information to determine whether to initiate handshake negotiation, and receives confirmation responses from the adapter. This structured feedback loop ensures reliable quick charging activation only when conditions are met, preventing premature or incorrect mode switching while maintaining efficient timing.
Data Source
AI summary
Provided are a charging control method and a mobile terminal. The charging control method includes the follows. The mobile terminal receives a level signal transmitted from the charging device through a D-data line of a charging interface, so as to determine the type of the charging device. The mobile terminal transmits a handshake request signal to the charging device through a D+ data line of the charging interface if it is determined that the charging device is an adapter or a mobile power supply, and the handshake request signal is used to query whether the charging device supports a quick charging mode.