Electronic device and control method thereof, touch control system, and chip system
US11977700B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2021 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Sep 14, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2019/085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A touch detection drive circuit in an electronic device inputs a touch excitation signal to a touch electrode, and receives a detection signal of the touch electrode. An isolation power supply circuit: receives the touch excitation signal and a primary power supply voltage; based on the touch excitation signal in a non-touch detection phase, short-circuits a first reference ground and a second reference ground, stores the primary power supply voltage, and transmits the primary power supply voltage to the touch detection drive circuit; and in a touch detection phase, disconnects the first reference ground from the second reference ground and discharges to the touch detection drive circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.