Sheet-like Electrode Wireless Power Receiver for Thin Devices
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Solution Overview
Problem
Conventional wireless power transmission systems for electronic devices like smartphones and tablets are bulky and lack the capability for wireless power transmission, necessitating external receiver devices that also require a larger form factor to efficiently transmit power.
Innovation Solution
The development of wireless power receiver, transmitter, and transceiver devices with sheet-like electrode configurations and insulation, incorporating step-down, rectifying, and inverting units to facilitate thinner and more compact designs, enabling efficient power transmission and reception while maintaining device usability and design aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wireless power receiver devices are used, then power transmission capability is achieved, but device thickness and size increase
Solution Approach 1:
The wireless power receiver device is divided into two main segments: a thin electrode sheet section (containing coplanar electrodes and lead lines) and a separate power receiver section (containing step-down, rectifying, and smoothing circuits). This segmentation allows the electrode structure to be made extremely thin while housing the bulkier electronic components in a separate module that can be strategically positioned.
Solution Approach 2:
The patent transitions from traditional three-dimensional stacked electrode configurations to a coplanar two-dimensional arrangement where both electrodes and lead lines lie in the same plane. This dimensional change enables the electrode sheet to be made extremely thin without compromising electrical functionality, directly addressing the thickness reduction goal.
2Adaptability or versatility
If external wireless power receiver devices are attached to electronic devices, then wireless power transmission is enabled, but the overall device size increases
Solution Approach 1:
The electrode sheet is constructed as an extremely thin flexible structure with coplanar electrodes and lead lines that can conform to the surface of electronic devices. This thin-film approach minimizes the volume added to the host device while maintaining wireless power reception functionality.
Solution Approach 2:
The wireless power receiver device is designed as a universal attachment that can be applied to various electronic devices regardless of their specific form factor. The coplanar electrode design and modular power receiver section create a standardized interface that works across different device types, maximizing adaptability while minimizing size.
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 solution allows for thinner and more compact wireless power devices that enhance power transmission efficiency, reduce heat generation and transmission loss, and maintain the design integrity of electronic devices, making them easier to carry and use.
Implementation Method 1
The electromagnetic induction type wireless power transmission system includes a wireless power transmitter device and a wireless power receiver device. The wireless power transmitter device includes a power transmitter coil, and the wireless power receiver device includes a power receiver coil. Electric power is transmitted between these coils.
Implementation Method 2
The capacitive coupling type wireless power transmission system includes a wireless power transmitter device and a wireless power receiver device. The wireless power transmitter device includes a power transmitter electrode, and the wireless power receiver device includes a power receiver electrode. Electric power is transmitted between these electrodes via electrostatic induction.
Data Source
AI summary
A wireless power receiver device includes a sheet-like electrode sheet section and a power receiver section. The electrode sheet section includes a power receiver side active electrode and a power receiver side passive electrode that are substantially coplanar and formed into sheet-like shapes; lead lines that are coplanar with both the electrodes, extended from the respective electrodes, and formed into sheet-like shapes; and an insulation sheet that covers both the electrodes and both the lead lines from both sides thereof. The power receiver section includes a step-down unit that steps down an alternating-current voltage induced between end portions of the lead lines; a power receiver module that rectifies and smoothes the alternating-current voltage that is stepped down by the step-down unit; and a connector for outputting an output voltage of the power receiver module.