Touch controller using simultaneously generated transmitting signals with different phases and associated chip, touch control system and touch control method
US11366554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2020 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Sep 1, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/9613
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The application discloses a touch controller to determine a position where a user touches a touchscreen. The touchscreen includes a first transmitting electrode, a second transmitting electrode and a receiving electrode. The touch controller includes a signal generation module and a demodulation module. The signal generation module is configured to perform an in-phase code transmission at a first time so that the receiving electrode receives an in-phase code receiving signal correspondingly, and perform an inverting-phase code transmission at a second time so that the receiving electrode receives an inverting-phase code receiving signal correspondingly. The demodulation module is configured to determine the position where the user touches the touchscreen according to the in-phase code receiving signal corresponding to the first time and the inverting-phase code receiving signal corresponding to the second time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.