Stylus Wireless Charging Chip With Direct Battery Output
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Solution Overview
Problem
Existing wireless charging systems have low charging efficiency and result in temperature rise during charging due to a lengthy charging link.
Innovation Solution
A wireless charging system with a chip designed as a single component combining RX and charger functions, shortening the charging link by directly outputting energy to the battery, utilizing a voltage-stabilizing charging circuit, boost charging circuit, or switched capacitor charging circuit, and including a micro-control unit and protocol encoding/decoding unit to manage energy transfer efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless charging link is shortened by integrating RX and charger functions into a single chip, then charging efficiency is improved and temperature rise is reduced, but device complexity is increased
Solution Approach 1:
The patent integrates the RX chip and charger chip into a single chip, combining multiple functions (rectification, voltage regulation, and battery charging) into one integrated component. This merging reduces the number of discrete components and interconnections, shortening the charging link and reducing energy loss, thereby improving charging efficiency while managing the inherent complexity through functional integration.
2Adaptability or versatility
If multiple charging circuits (voltage-stabilizing, boost, switched capacitor) are integrated into the chip, then adaptability to different charging scenarios is improved, but device complexity is increased
Solution Approach 1:
The charger unit is designed with multiple charging circuit types (voltage-stabilizing charging circuit, boost charging circuit, and switched capacitor charging circuit) integrated into a single chip. This multi-functional design allows the chip to adapt to different charging scenarios and battery requirements, providing universal compatibility while maintaining a compact form factor through integration.
3Loss of energy
If the charging link is shortened by direct energy output to battery, then energy loss is reduced and charging efficiency is improved, but manufacturing precision requirements are increased
Solution Approach 1:
The patent extracts and eliminates intermediate components and conversion stages from the traditional wireless charging link by integrating RX and charger functions directly. This extraction shortens the energy transfer path, reducing the number of interfaces and conversion steps where energy loss occurs, thereby improving overall charging efficiency while requiring precise manufacturing to ensure reliable direct connections.
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
Improves charging efficiency and reduces temperature rise during charging by shortening the wireless charging link and optimizing energy transfer, leading to faster and more effective battery charging.
Implementation Method 1
the first coil is configured to be coupled to the second coil to obtain an alternating current signal
Implementation Method 2
the rectifier is configured to rectify an input alternating current signal into a direct current signal
Data Source
AI summary
Embodiments of this application provide a wireless charging system, a chip, and a wireless charging circuit. The wireless charging system includes an electronic device and a stylus, where the electronic device is configured to wirelessly charge the stylus; and the stylus includes a wireless charging circuit. The wireless charging circuit includes a first coil, a chip, and a first battery, the chip includes a rectifier, a charger unit, a micro-control unit, and a protocol encoding/decoding unit. The charger unit includes a voltage-stabilizing charging circuit, a boost charging circuit, or a switched capacitor charging circuit; and the charger unit is configured to charge the first battery by using the direct current signal from the rectifier. For the stylus, energy is coupled from the coil, passes through the chip, and then is directly output to a battery of the stylus.