Insulated Charging Coil on Touch Panel Ground Trace
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Solution Overview
Problem
The efficiency of wireless charging is reduced due to electrical conductors like metal grounding during magnetic signal transmission, which occurs in electronic devices with metallic or plastic bodies.
Innovation Solution
A wireless charging device with a charging coil insulated from a ground trace layer, utilizing a ground trace layer with staggered traces to minimize shielding and enhance magnetic signal transmission, and an information processing method to control charging and touch recognition functions based on object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the charging coil is arranged on the front side or back side of the electronic apparatus body, then the wireless charging function can be implemented, but the magnetic signal transmission efficiency is reduced due to grounding through metallic or plastic body materials
Solution Approach 1:
The patent introduces an insulating layer as an intermediary between the charging coil and the ground trace layer. This insulating layer prevents direct electrical contact and grounding of the magnetic signal while allowing the magnetic field to pass through, thereby resolving the contradiction between implementing wireless charging and maintaining transmission efficiency
Solution Approach 2:
The patent segments the ground trace layer into isolated trace portions separated by insulating material. This segmentation prevents continuous grounding paths for the magnetic signal while maintaining the grounding function in controlled areas, thus improving magnetic signal transmission efficiency without compromising the wireless charging function
2Volume of moving object
If the charging coil is placed close to the ground trace layer to reduce device thickness, then device compactness is improved, but magnetic signal interference and grounding effects increase
Solution Approach 1:
The insulating layer serves as a mediator that enables close placement of the charging coil near the ground trace layer while preventing harmful magnetic signal interference and grounding effects. This allows the device to maintain compact thickness without suffering from increased interference
Solution Approach 2:
The patent applies insulating material specifically in the regions where the charging coil is located, creating local quality differentiation. The ground trace layer maintains its grounding function in non-coil areas while being isolated under the coil area, thus reducing interference while preserving overall device compactness
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
The insulation of the charging coil from the ground trace layer increases wireless charging efficiency and allows for intelligent control of charging and touch functions, ensuring optimal operation without interference.
Implementation Method 1
the transmission of a magnetic signal emitted by the charging coil
Data Source
AI summary
A wireless charging device, an electronic apparatus and an information processing method are provided. The wireless charging device includes a charging coil and a touch panel on which the charging coil is arranged, where the touch panel includes a ground trace layer, and the charging coil is insulated from the ground trace layer. With the wireless charging device, the efficiency of wireless charging can be increased.