Dynamic Frequency Adjustment for Mobile Device EMI Reduction
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Solution Overview
Problem
Mobile devices produce electromagnetic waves exceeding industry standards when multiple modules operate simultaneously due to frequency interference, posing a risk to human health and violating regulatory limits.
Innovation Solution
A method and apparatus that change the operating frequency of one module when another module is activated, specifically altering the charging frequency of a charger module when a camera module is in use, to prevent electromagnetic wave levels from exceeding safe limits by adjusting the frequency to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple modules operate simultaneously at their designated frequencies, then functional versatility and productivity are improved, but electromagnetic wave interference increases causing harmful factors to exceed safety standards
Solution Approach 1:
The patent changes the operating frequency parameter of the first module dynamically. When the second module is activated, the control unit changes the first operating frequency to a second operating frequency that is different from the first, thereby avoiding frequency interference and reducing electromagnetic wave magnitude to within safety standards.
Solution Approach 2:
The patent implements dynamic frequency adjustment where the operating frequency of the first module is not fixed but can be changed in real-time based on the operational state of other modules. The control unit monitors module activation and dynamically switches frequencies to prevent interference.
2Object-generated harmful factors
If the operating frequency of the first module is changed when the second module is activated, then electromagnetic wave interference is reduced, but system complexity and control difficulty increase
Solution Approach 1:
The patent implements a feedback mechanism where the control unit monitors the operational state of modules and automatically adjusts the frequency of the first module accordingly. When the second module is activated, the system detects this state and triggers the frequency change, creating a closed-loop control system that manages complexity through automation.
Solution Approach 2:
The control unit automatically manages frequency adjustment without requiring external intervention. The system self-regulates by detecting module activation states and autonomously changing frequencies to prevent interference, reducing the burden on users and simplifying operation.
Data Source
AI summary
A method and an apparatus for reducing electromagnetic waves in a mobile device are provided. According to the method, in a mobile device having the first and second modules with different functions, the apparatus operates the first module at the first operating frequency. If there is a request for operating the second module while the first module is operated, the apparatus changes the first operating frequency to a second operating frequency which is different from the first operating frequency, and operates the first module at the second operating frequency. The apparatus reduces a total magnitude of electromagnetic waves caused by a simultaneous operation of two or more modules, thereby enhancing the quality of the mobile device and minimizing any undesirable impact upon the human body.