Charging detection circuit, charging case, communication apparatus of earphone and earphone
US11349328B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2019 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Apr 8, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/1025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a charging detection circuit, a charging case and a communication apparatus of charging. The charging detection circuit includes: a first touch point, a second touch point, a switching circuit, a charging circuit, a detecting circuit and a first communication circuit, where the switching circuit is connected to the first touch point; the charging circuit is connected to the detecting circuit via the second touch point; the first communication circuit is connected to the first touch point and/or the second touch point; when a supply voltage of the first touch point is a system voltage, and the first touch point and the second touch point are both in contact with a first device, the detecting circuit triggers the first communication circuit to acquire a state of charge of the first device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.