Magnetically Fastened Display Module With Shielded Wireless Charging
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Solution Overview
Problem
Existing display devices face challenges in implementing wireless rechargeability and maintaining efficient wireless communication due to magnetic field interference between coupling magnets and charging coils.
Innovation Solution
Incorporating a shield part made of high magnetic permeability materials like Fe, Ni, or ferrite between the coupling magnet and charging coil to prevent magnetic field interference, while using a layered structure with high heat conductivity materials for efficient heat dissipation and forming an uneven surface area to enhance wireless charging and communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a coupling magnet is placed near a charging coil for wireless power transfer, then wireless charging functionality is achieved, but magnetic field interference degrades charging efficiency and communication quality
Solution Approach 1:
The patent divides the display device into separate functional modules: a coupling magnet module for magnetic coupling and a charging coil module for wireless power transfer. By spatially segmenting these components and introducing a shield part between them, the magnetic field interference is isolated, allowing both wireless charging functionality and communication quality to be maintained simultaneously.
Solution Approach 2:
A shield part made of magnetic shielding material is introduced as an intermediary element between the coupling magnet and the charging coil. This shield part acts as a mediator that blocks and redirects magnetic field lines, preventing the coupling magnet's magnetic field from interfering with the charging coil's electromagnetic field, thus resolving the contradiction between achieving wireless charging and maintaining communication quality.
2Reliability
If magnetic shielding material is added to block interference, then communication quality improves, but device complexity increases
Solution Approach 1:
The shield part is designed to serve multiple functions simultaneously: it provides magnetic field shielding to protect wireless communication quality, acts as a structural support element, and can be integrated with the housing or internal framework of the display device. This multi-functionality approach reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved communication quality.
3Productivity
If coupling magnet and charging coil are positioned close together, then wireless power transfer efficiency improves, but magnetic field interference with communication signals increases
Solution Approach 1:
The patent applies local quality by positioning the shield part specifically in the region where magnetic field interference occurs between the coupling magnet and communication antennas. The shield part is strategically placed to block magnetic field lines only in the critical interference zones, while allowing the coupling magnet and charging coil to maintain their close positioning for efficient power transfer. This localized shielding approach addresses the harmful magnetic field interference without compromising overall wireless power transfer efficiency.
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
Facilitates wireless charging efficiency and enhances the quality of wireless communication by isolating magnetic fields, allowing for flexible and efficient power supply to display modules without interference.
Implementation Method 1
a shield part located between the coupling magnet and the charging coil to cut off a magnetic field of the coupling magnet so as to prevent the magnetic field from affecting the charging coil
Implementation Method 2
The shield part may include heat-dissipating material... High heat conductivity material and high magnetic permeability material may configure a layered structure in the shield part
Data Source
AI summary
Disclosed is a display device, including a body frame having a transmitting coil supplying power, a display module having a charging coil supplied with the power from the transmitting coil and located on a front side of the body frame, a fastening part fastening the display module to the body frame with a magnetic force, and a shield part located between the coupling magnet and the charging coil to cut off a magnetic field formed by the fastening unit so as to prevent the magnetic field from affecting the charging coil. Accordingly, the display module can be recharged by wireless charging, thereby facilitating installation of the display module in the body frame.