Method of detecting touch and apparatus for detecting touch using the same
US9274663B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2014 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Jun 25, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are an apparatus for detecting touch and a method for detecting touch with reduced effect of noise. The apparatus includes a signal source configured to generate a variable frequency signal changed from a starting frequency to an ending frequency, a touch panel including a plurality of driving electrodes and a plurality of sensing electrodes, wherein the variable phase signal is applied to one of the plurality of driving electrodes, and the sensing electrode outputs a touch signal that is modulated by the variable frequency signal, a demodulation unit configured to demodulate the touch signal using the variable frequency signal, and an accumulation unit configured to accumulate the demodulated touch signal to detect the touch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.