Integrated Circuit Wireless Charging System for Electric Toothbrushes
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Solution Overview
Problem
Conventional electric toothbrushes with discrete component-based power transfer units are costly, complex, and difficult to design compactly due to the need for large enclosures to house all components.
Innovation Solution
An integrated circuit (IC) for wireless power transfer that includes a boost controller, oscillator, MOS driver, and power switch, which converts DC input to AC for a resonant circuit, reducing size and complexity by integrating key components and optimizing power transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If discrete components are used to construct the power transfer unit, then the functional blocks can be independently designed and assembled, but the design cost and complexity substantially increase
Solution Approach 1:
The patent merges multiple discrete functional blocks (controller, driver, protection circuits) into a single integrated circuit chip. This consolidation eliminates the need for separate discrete components while reducing overall design complexity and cost, directly resolving the contradiction between independent design capability and manufacturing complexity.
2Ease of manufacture
If discrete components are used in the power transfer unit, then each component can be optimized independently, but the overall unit size becomes large requiring a large enclosure
Solution Approach 1:
The patent integrates multiple independently optimized functional blocks onto a single IC chip, maintaining the benefits of independent component optimization while dramatically reducing the overall volume. The integrated circuit contains all necessary functional blocks in a compact form factor, eliminating the need for large enclosures required by discrete component assemblies.
3Device complexity
If an integrated circuit is used to consolidate functional blocks, then the size and complexity are reduced, but the integration of multiple functions into a single chip increases manufacturing difficulty
Solution Approach 1:
The patent designs a universal integrated circuit that can serve multiple functions (controller, driver, protection) within a single chip architecture. This multi-functional design approach simplifies the manufacturing process by using standardized IC fabrication techniques rather than requiring complex assembly of multiple discrete components, thereby reducing manufacturing difficulty while achieving size reduction.
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 IC-based system reduces the cost, complexity, and size of electric toothbrushes and charging stations while enhancing wireless power transfer efficiency and protection against overcurrent, overtemperature, and voltage surges.
Implementation Method 1
a boost controller configured to pump up a system input to a DC input voltage
Implementation Method 2
an oscillator configured to generate a frequency signal
Implementation Method 3
a resonant circuit connected to the integrated circuit
Implementation Method 4
The MOS driver may be configured to receive the frequency signal and drive the power switch to convert, based on the frequency signal, the DC input to an AC input
Data Source
AI summary
An integrated circuit for wireless power transfer is disclosed. The integrated circuit may comprise a boost controller configured to pump up a system input to a DC input, an oscillator configured to generate a frequency signal, a MOS (metal-oxide-semiconductor) driver coupled to the oscillator, and a power switch coupled to the MOS driver. The MOS driver may be configured to receive the frequency signal and drive the power switch to convert, based on the frequency signal, the DC input to an AC input to a resonant circuit connected to the integrated circuit.