Wireless Charging Assembly with Opposite-Side Touch Structure
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Solution Overview
Problem
Current wireless charging technologies face challenges in integrating both wireless charging and touch functionality effectively, particularly in thin and lightweight designs, where the electromagnetic induction type interferes with capacitive touch recognition, and existing solutions lack high recognition accuracy and multi-touch support.
Innovation Solution
A wireless charging assembly is developed with a charging emission trace and a capacitive touch structure on opposite sides of a substrate, allowing for independent operation of wireless charging and touch functions. The charging emission trace is directly manufactured on the substrate, potentially comprising multiple layers to enhance charging efficiency, and the touch structure is integrated into a display panel, utilizing self-capacitive or mutual-capacitive touch mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic induction type wireless charging is used, then wireless charging function is achieved, but touch recognition accuracy deteriorates due to electromagnetic interference
Solution Approach 1:
The patent divides the device surface into distinct functional regions: a first region dedicated to wireless charging with emission traces, and a second region dedicated to touch recognition with touch-sensitive elements. This spatial segmentation prevents electromagnetic interference from affecting touch recognition by isolating the two functions into separate areas.
Solution Approach 2:
The patent extracts the touch recognition function from areas with high electromagnetic field intensity by placing touch-sensitive elements in a second region that is spatially separated from the wireless charging emission traces in the first region. This extraction removes the source of interference from the touch recognition zone.
2Device complexity
If wireless charging and touch structure are integrated in the same region, then device complexity is reduced, but function interference occurs between charging and touch recognition
Solution Approach 1:
The patent segments the device surface into a first region for wireless charging and a second region for touch recognition. This segmentation maintains functional independence while achieving overall integration, preventing interference between charging and touch functions by assigning them to separate spatial zones.
Solution Approach 2:
The patent utilizes spatial dimensionality by distributing wireless charging emission traces and touch-sensitive elements across different regions of the device surface. This dimensional arrangement allows both functions to coexist without interference, transforming the problem from a two-dimensional overlap to a spatially distributed configuration.
3Reliability
If traditional wireless charging design is used, then charging function is achieved, but device thickness and weight increase
Solution Approach 1:
The patent employs thin-film technology for the wireless charging emission traces and touch-sensitive elements, allowing both functions to be integrated into a thin device structure. This approach maintains charging functionality while significantly reducing the weight and thickness compared to traditional wireless charging designs.
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 solution enables both wireless charging and touch recognition with high accuracy and multi-touch support, avoiding interference between the two functions, resulting in a thinner, lighter, and more adaptable wireless charging assembly that can be integrated into various devices like notebook computers.
Implementation Method 1
wireless charging technology has been applied in various electronic devices
Implementation Method 2
the touch structure is a self-capacitive touch structure or a mutual-capacitive touch structure
Data Source
AI summary
A wireless charging assembly includes a substrate and a charging emission trace on the substrate. The wireless charging assembly further includes a touch structure on a side, which is away from the charging emission trace, of the substrate. A preparation method of the wireless charging assembly, a terminal device and a wireless charging method for the terminal device are also provided.