Method of driving and detection for capacitive touch screen and device thereof
US8730207B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2012 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Nov 16, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04166
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of driving and detection for a capacitive touch screen and a device thereof are provided. The method includes: sending, from a driving side, excitation signals through a plurality of channels simultaneously during the same driving and detection time period; receiving, by each of receiving channels at a receiving side, a charge signal generated from the excitation signals through coupling capacitances at corresponding touch detection points, and performing detection, which includes: converting and amplifying the charge signal into a voltage signal, and performing signal demodulation and analog-to-digital conversion on the voltage signal; and storing digital signals obtained from the analog-to-digital conversion, and analyzing the digital signals by a controller to obtain a detection result. This can achieve rapid scan, increase frame rate in detection, and meet the rapidity requirement for performing display driving and touch detection at different time slots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.