Electronic stylus, capacitive touchpad module, and apparatus for touch input
US8564553B2 · kind B2 · utility
19Cited by
17References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2010 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Feb 25, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic stylus emits an excitation signal to apply to a trace of a capacitive touchpad module near a touch point when the electronic stylus touches the capacitive touchpad module, so as to change a waveform of a charging/discharging signal in the trace, and depending on the waveform variation, the capacitive touchpad module can identify the touch point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.