Electronic Device Selective Coil Power Sharing
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Solution Overview
Problem
The efficiency of power transfer between electronic devices with coils of different sizes is compromised due to variations in coupling coefficients, leading to suboptimal power sharing and data communication.
Innovation Solution
An electronic device is configured with a power management circuit, a transceiver circuit, and coils connected in parallel or series based on identification information of external devices to optimize power transfer and payment signal transmission, utilizing a control circuit to manage switch states for efficient power sharing and data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If coils of different sizes are used for power transmission and reception, then the device can support power sharing with various external electronic devices, but the coupling coefficient decreases and power transfer efficiency becomes lower
Solution Approach 1:
The antenna is divided into multiple coils (first coil and second coil) with different sizes. The control circuit selectively activates appropriate coils based on the size and type of the external electronic device, ensuring optimal coupling efficiency for each device while maintaining versatility across different device types.
Solution Approach 2:
The system dynamically selects and switches between different coils based on real-time identification of external devices. The control circuit adjusts which coils are active based on device characteristics, enabling adaptive optimization of power transfer efficiency for each specific external device connected.
2Productivity
If multiple coils are connected in parallel to the transceiver circuit, then power sharing efficiency improves for devices with matching coil sizes, but the device complexity increases
Solution Approach 1:
The control circuit dynamically configures coil connections (series or parallel) based on the identified external device characteristics. This dynamic switching capability allows the system to optimize power transfer for different device types while managing complexity through automated control rather than manual configuration.
Solution Approach 2:
The system uses identification information from external devices to feedback into the control circuit, which then automatically determines the optimal coil connection configuration. This closed-loop control eliminates the need for manual setup and ensures optimal efficiency without requiring user knowledge of complex connection configurations.
3Reliability
If coils are connected in series to transmit payment signals, then the magnetic field strength increases and payment recognition rate improves, but the power transfer efficiency for charging decreases
Solution Approach 1:
The control circuit switches between series and parallel coil connections based on the operational mode detected from external device identification. For payment transactions, coils are connected in series to generate strong magnetic fields for reliable signal recognition. For charging operations, coils are connected in parallel to optimize power transfer efficiency, thus resolving the contradiction through dynamic reconfiguration.
Solution Approach 2:
The system periodically switches between different coil connection configurations based on the type of operation being performed (payment vs. charging). This periodic reconfiguration ensures optimal performance for each specific function, allowing strong magnetic fields during payment and efficient power transfer during charging without compromising either function.
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 configuration enhances power sharing efficiency and payment recognition by adjusting coil connections based on external device identification, improving the recognition rate and distance of wireless communication.
Implementation Method 1
A wireless charging technology capable of charging a battery of an electronic device even without connecting to a wired charger has been applied to various electronic devices
Implementation Method 2
The electronic device can improve a recognition rate of the payment by connecting the first coil and the second coil in series to the transceiver circuit so that a strong magnetic field is formed around the electronic device
Data Source
AI summary
An electronic device for supporting power sharing and data communication with an external electronic device, and a method therefor are provided. The electronic device includes a power management circuit, an antenna including a first coil and a second coil, a transceiver circuit configured to transmit a power signal received from the power management circuit to the antenna and to transmit a power signal received from the antenna to the power management circuit, the transceiver circuit including a first transceiver terminal and a second transceiver terminal, a first switch, and a control circuit electrically connected to the first switch and the transceiver circuit. A first end of the second coil may be connected to the first transceiver terminal. A second end of the second coil may be connected to the second transceiver terminal. A first end of the first coil may be connected to the first transceiver terminal through the first switch. A second end of the first coil may be connected to the second transceiver terminal. The control circuit may be configured to control the first switch based on identification information of an external electronic device received from the antenna through the transceiver circuit.