System and method of communication between a capacitive touch screen and an active stylus
US10185454B2 · kind B2 · utility
2Cited by
5References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2017 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Nov 15, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.