Wireless charging system, chip, and wireless charging circuit
US11995251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2022 |
| Grant date | May 28, 2024 |
| Priority date | — |
| Expiry date | Jan 27, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B40/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.