Wireless Charging Frequency Cancellation for Display Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Frequency interference between the operating frequency of a wireless charger and components of an electronic device, such as a display or pen, can cause malfunctions during wireless charging, and changing the charging voltage or current to cancel this interference may lead to unnecessary re-recognition or cut-off of the charging process.
Innovation Solution
The electronic device includes a processor that adjusts the charging current and voltage levels in response to the display being switched on during charging, transmitting packets to the wireless charger to synchronize these levels and minimize interference, thereby maintaining stable wireless charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the charging voltage or current is changed to cancel frequency interference, then component malfunctions are prevented, but unnecessary wireless charging re-recognition or cut-off occurs
Solution Approach 1:
The patent changes the operating frequency parameter of the wireless charger to resolve frequency interference with display components, instead of changing charging voltage or current. This involves adjusting the resonant frequency of the magnetic resonance wireless charging system to avoid overlapping with the display's operating frequency, thereby eliminating interference while maintaining stable charging without triggering re-recognition or cut-off events.
2Reliability
If the operating frequency of the wireless charger is adjusted to avoid interference, then component malfunction is prevented, but charging efficiency may be affected
Solution Approach 1:
The patent implements dynamic frequency adjustment capability in the wireless charger, allowing the operating frequency to be adaptively changed based on detected interference conditions. The system can dynamically switch between different frequency points while maintaining magnetic resonance coupling efficiency, ensuring both component protection and charging performance through real-time frequency optimization.
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 effectively prevents component malfunctions due to frequency interference and ensures stable wireless charging by dynamically adjusting charging parameters to align with the wireless charger's settings.
Implementation Method 1
A wireless charging-enabled electronic device receives charging power from another electronic device via magnetic induction coupling or magnetic resonant coupling
Implementation Method 2
A wireless charging-enabled electronic device receives charging power from another electronic device via magnetic induction coupling or magnetic resonant coupling
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An electronic device and method are provided for frequency interference cancellation. The electronic device includes a coil, a wireless power receive circuit, a charging circuit, a display, and a processor. The processor may be configured to perform wireless charging with power wirelessly received from a wireless charger, change, via the charging circuit, a charging current of the electronic device from an initial current level to a first current level, based on the display being switched on during wireless charging, change, via the wireless power receive circuit, a charging voltage of the electronic device from an initial voltage level to a first voltage level, transmit, via the coil, a packet for changing a charging voltage of the wireless charger, change, via the wireless power receive circuit, the charging voltage of the electronic device to a second voltage level upon transmission of the packet, and change the charging current to the initial current level.