Integrated Charging and NFC Module for Mobile Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
NFC modules and non-contact charging modules in mobile terminals interfere with each other due to shared magnetic flux, leading to reduced communication and power transmission efficiency, and hinder miniaturization, especially when one surface of the device is used for display, making it difficult to downsize smartphones.
Innovation Solution
A mobile terminal design that integrates a non-contact charging coil, an NFC antenna, and magnetic sheets into a single module, allowing communication and power transmission in the same direction, with the battery pack and charging module arranged adjacent to each other to minimize interference and weight imbalance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NFC module and non-contact charging module are provided as separate modules with各自的 magnetic sheets, then communication efficiency and power transmission efficiency are improved, but device size increases and miniaturization is hindered
Solution Approach 1:
The patent combines the NFC module and non-contact charging module into a single integrated module, sharing common components including the magnetic sheet, coil structure, and housing. This merging eliminates the need for separate modules while maintaining both NFC communication and wireless charging functions, thereby reducing device size without compromising communication efficiency
Solution Approach 2:
The integrated module is designed to perform multiple functions simultaneously - both NFC communication and non-contact charging. The shared magnetic sheet and coil structure serve dual purposes: supporting NFC electromagnetic induction for communication and supporting power transmission for wireless charging, making the module universal and eliminating the need for separate dedicated components
2Reliability
If NFC module and non-contact charging module are provided as separate modules with各自的 magnetic sheets, then communication efficiency and power transmission efficiency are improved, but device complexity increases
Solution Approach 1:
The patent merges the NFC module and non-contact charging module into a single integrated unit, eliminating the need for separate module structures. The shared magnetic sheet, coil, and housing reduce structural complexity while maintaining power transmission efficiency through optimized electromagnetic induction design
Solution Approach 2:
Within the integrated module, the patent uses segmentation to separate different functional areas - the NFC antenna region and the charging coil region - while sharing common supporting structures. This segmentation allows each function to operate independently with optimal performance while reducing overall structural complexity through shared components
3Object-affected harmful factors
If communication directions of NFC module and non-contact charging module are made to differ to avoid mutual interference, then interference is reduced, but user convenience deteriorates as communication surface changes depending on communication type
Solution Approach 1:
The patent combines both communication functions in a single module with unified orientation, eliminating the need for different communication directions. The shared magnetic sheet and housing structure enable both NFC and charging functions to operate in the same direction without mutual interference, maintaining consistent communication surface and improving user convenience
Solution Approach 2:
The patent uses the shared magnetic sheet as an intermediary that mediates between NFC and charging functions. The magnetic sheet is designed to support both types of electromagnetic induction with optimized magnetic permeability, acting as a common platform that enables both functions to coexist in the same direction without interference
4Adaptability or versatility
If non-contact charging module is provided in mobile terminal, then wireless charging capability is added, but device thickness increases
Solution Approach 1:
The patent integrates the non-contact charging module with the NFC module into a single unified structure, sharing the magnetic sheet, coil, and housing. This merging eliminates redundant components and reduces overall module thickness, allowing wireless charging capability to be added without significantly increasing device thickness
Solution Approach 2:
The patent employs a nested structure where the NFC antenna is positioned within or adjacent to the charging coil structure, and both are supported by the same magnetic sheet. This nesting arrangement maximizes space utilization and minimizes the overall thickness of the integrated module, enabling wireless charging without proportionally increasing device thickness
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 design enhances power transmission and communication efficiency while reducing the device's thickness and size, improving user convenience by allowing charging and communication on the same surface without surface changes.
Implementation Method 1
electromagnetic induction is generated between the two coils at a frequency in a band between approximately 100 kHz and 200 kHz to thereby transfer electric power from the charger to the communication apparatus side
Implementation Method 2
NFC (Near Field Communication) antennas that utilize RFID (Radio Frequency IDentification) technology and use radio waves in the 13.56 MHz band
Implementation Method 3
an NFC antenna is provided with a magnetic sheet that improves the communication efficiency in the 13.56 MHz band and thus configured as an NFC antenna module. Technology has also been proposed in which a non-contact charging module is also provided with a magnetic sheet that improves the efficiency of communication in the band between approximately 100 kHz and 200 kHz
Data Source
AI summary
A mobile terminal is provided with a housing, a circuit board included in the housing and having a thickness direction normal to a plane of the circuit board, a battery pack included in the housing, and a non-contact charging module included in the housing. The non-contact charging module includes a charging coil formed of a wound conducting wire; a communication coil arranged adjacent to the charging coil; and a magnetic sheet on which the charging coil and the communication coil are arranged. The magnetic sheet has four edges that collectively define a rectangular profile of the magnetic sheet, and at most three pairs of adjacent edges respectively meet to form at most three corners. At least a portion of the non-contact charging module overlaps with the circuit board as viewed in the thickness direction of the circuit board.