Wireless Power Transmitter Dynamic Frequency and Strength Control
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Solution Overview
Problem
Wireless power transmission devices using electromagnetic waves face interference between RF waves for charging and communication signals, leading to decreased data rates or efficiency due to similar frequency usage.
Innovation Solution
Incorporating a control circuit in wireless power transmission devices and electronic devices to receive and transmit information about the communication environment, allowing for adjustment of RF wave frequency and transmission strength to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If RF wave frequency is used for wireless power transmission, then power transmission efficiency is improved, but communication signal interference increases
Solution Approach 1:
The patent implements dynamic frequency selection where the wireless power transmission device adjusts the RF wave frequency based on real-time communication environment information. The control circuit receives communication environment data from the electronic device and dynamically selects an optimal frequency that avoids communication signals, thereby maintaining power transmission efficiency while reducing interference.
Solution Approach 2:
The patent changes the frequency parameter of the RF wave based on communication environment conditions. By receiving information about communication signal frequencies from the electronic device, the control circuit adjusts the RF wave frequency to a value that minimizes interference, thus resolving the contradiction between power transmission efficiency and communication interference.
2Productivity
If RF wave transmission strength is increased, then wireless charging efficiency is improved, but interference with communication signals increases
Solution Approach 1:
The patent implements dynamic transmission strength adjustment where the control circuit receives communication environment information and adjusts the RF wave transmission strength accordingly. When communication signals are detected in the environment, the transmission strength is reduced to minimize interference, while maintaining high efficiency when no communication signals are present.
Solution Approach 2:
The patent changes the transmission strength parameter of the RF wave based on communication environment conditions. By adjusting this parameter dynamically according to received communication environment information, the system optimizes wireless charging efficiency while preventing excessive interference with communication signals.
3Object-affected harmful factors
If communication environment information is collected and processed, then interference reduction is achieved, but device complexity increases
Solution Approach 1:
The patent merges the communication environment information collection function into the existing communication module of the electronic device. The same communication circuit used for data communication also collects communication environment information, which is then transmitted to the wireless power transmission device. This approach reduces additional hardware complexity while achieving interference reduction.
Solution Approach 2:
The patent uses the communication signal as an intermediary to convey communication environment information. Instead of requiring separate sensing hardware, the communication module itself serves as the intermediary that collects and transmits information about the communication environment, enabling the control circuit to adjust RF parameters without adding significant complexity.
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
Enhances the efficiency of wireless charging by optimizing RF wave conditions based on communication environment data, reducing interference and maintaining data throughput.
Implementation Method 1
a power transmission circuit configured to form an RF wave based on the source signal
Implementation Method 2
a power reception circuit configured to convert an RF wave formed from a wireless power transmission device into electrical energy
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
According to various embodiments, a wireless power transmission device comprises: a first-scheme communication circuit; a power source for generating a source signal; a power transmission circuit for forming an RF wave on the basis of the source signal; and a control circuit, wherein the control circuit can be configured to receive, from an electronic device supporting first-scheme communication and second-scheme communication, a communication signal including information on a communication environment according to the second-scheme communication through the first-scheme communication circuit, and to control, on the basis of the information on the communication environment according to the second-scheme communication, the frequency of the source signal generated by the power source and/or the transmission strength of the RF wave. Other various embodiments are possible.