Low-power and low-frequency data transmission for stylus and associated signal processing
US9798396B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2015 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Apr 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04108
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a controller includes one or more computer-readable non-transitory storage media embodying logic that is operable when executed to: initiate an acquisition of a first signal from an electrode of a touch sensor according to an acquisition frequency of the touch sensor, store a first modulated signal which includes a modulated form of the first signal, initiate an acquisition of a second signal from the electrode of the touch sensor according to the acquisition frequency of the touch sensor, reverse a polarity of the second signal to produce a third signal, store a second modulated signal which includes a modulated form of the third signal, generate a signal-timing waveform based on the first and second modulated signals, and retrieve information associated with a stylus from the generated signal-timing waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.