Eyewear Wireless Charging Coil Layout for Positional Freedom
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Solution Overview
Problem
Existing wireless charging systems for eyewear are limited by positional constraints due to the fixed location of receiver and transmitter antennas, which restrict the folding and storage of eyewear, and often require additional antennas and circuitry that increase bulk, cost, and interference.
Innovation Solution
Incorporating repeater antennas in opposing arms of eyewear to maintain separation distance and enhance positional freedom, using lightweight and efficient antennas like wire wound or PCB antennas, and implementing damping circuits to improve signal quality and reduce thermal constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless charging is implemented in eyewear using a charging case, then charging convenience is improved, but the charging coil assembly occupies valuable internal space and increases device complexity
Solution Approach 1:
The patent transitions from a three-dimensional embedded coil assembly within the eyewear to a two-dimensional planar coil structure that lies flat against the temple. This dimensional change allows the charging interface to extend outward from the eyewear frame rather than being confined within it, effectively moving the charging function to a different spatial dimension and eliminating internal space constraints.
Solution Approach 2:
The charging coil is extracted from the internal volume of the eyewear temple and repositioned on the external surface. By removing the coil assembly from the constrained internal space and placing it on the outer temple surface, the patent eliminates the space occupation problem while maintaining the wireless charging functionality through contact with the charging case.
2Ease of operation
If a charging case with integrated coil is used, then wireless charging capability is achieved, but the coil assembly adds weight and bulk to the eyewear system
Solution Approach 1:
By repositioning the coil from a three-dimensional embedded assembly to a two-dimensional planar structure on the temple surface, the patent reduces the volumetric displacement and associated weight. The flattened coil configuration minimizes material usage while maintaining electromagnetic coupling capability with the charging case.
Solution Approach 2:
The patent employs a thin-film planar coil structure that can be integrated into the temple without adding significant bulk or weight. This thin-film approach allows the charging interface to be lightweight yet functional, eliminating the need for heavy enclosed coil assemblies while maintaining wireless charging capability.
3Area of stationary object
If the charging coil is positioned on the temple surface, then space utilization is improved, but the coil becomes more vulnerable to external damage and interference
Solution Approach 1:
The planar coil is integrated within or protected by the temple structure itself, which serves as a protective shell. The temple frame naturally shields the coil from external damage while allowing electromagnetic field penetration for charging. This integrated approach provides mechanical protection without requiring additional protective layers that would interfere with charging functionality.
Solution Approach 2:
The patent merges the charging coil structure with the temple framework, combining the structural support function with the electromagnetic charging function. The temple itself becomes both the structural element and the protective housing for the coil, eliminating the need for separate protective components and reducing overall vulnerability.
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
Enables flexible folding of eyewear while maintaining wireless charging efficiency, reducing bulk and cost, and improving thermal performance and data transmission quality.
Implementation Method 1
the first coil assembly and the second coil assembly are configured to wirelessly provide power to the electronic component
Data Source
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AI summary
Eyewear and receptacles for housing such eyewear include components of a wireless power transfer system. The eyewear includes a receiver system for receiving power from a transmission system associated with the receptacle(s). The receiver system includes at least one receiver antenna, for receiving wireless power from the transmission system, and a repeater antenna for repeating the wireless power signal to the receiver antenna. The receiver antenna is positioned proximate to a first arm of the eyewear and the repeater is positioned proximate to a second arm of the eyewear. Positioning of the receiver and repeater antennas allows for positional freedom of the eyewear and/or the arms of the eyewear, when mechanically received by the receptacle.