Determining touch terminal and active stylus target operating frequency according to noise information
US9939975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2014 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Jul 23, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0442
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch terminal, an active stylus detection method, and a system are disclosed. The method includes the following steps: separately scanning, by a touch screen controller, multiple pieces of noise information on multiple operating frequencies of an active stylus of a touch screen; determining, by the touch screen controller, a target operating frequency according to the multiple pieces of noise information; and sending, by the touch screen controller, the target operating frequency to the active stylus, and adjusting an operating frequency of the active stylus to the target operating frequency, so that the active stylus and the touch screen operate jointly at the target operating frequency. In the method, the touch screen controller scans noise information on multiple operating frequencies of the active stylus, so as to determine a target operating frequency of the active stylus, so that the active stylus operates at the target operating frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.