Noise reduction method, device and system on the basis of touch detection of a capacitive screen
US9170675B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2012 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Feb 2, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
It is provided a noise reduction method, device and system on the basis of touch detection of a capacitive screen. The noise reduction method includes: sending a first scanning waveform to all receiving terminals by a first sending terminal and then sending a second scanning waveform to all the receiving terminals by a second sending terminal during a detection time period, wherein the phase of the first scanning waveform is continuous with that of the second scanning waveform and the first scanning waveform has a same frequency as that of the second scanning waveform; and filtering a signal received by the receiving terminals after demodulating it. Non-gap scanning can be achieved by performing continuation process to the scanning waveform, i.e. by achieving that the phases are continuous and the frequencies are the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.