Touch sensing system and method for driving the same by changing a frequency of a resonant inductive signal
US9927929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2014 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Oct 30, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch sensing system and a method for driving the same. The touch sensing system includes a pen with a resonant circuit embedded therein, XY electrodes including X electrodes and Y electrodes substantially perpendicular to the X electrodes, an antenna surrounding the XY electrodes, and a first touch driving circuit. The first touch driving circuit supplies a resonant inductive signal to the XY electrodes, analyzes a resonance signal received through the antenna, and decides a location and a pen pressure of the pen. The resonant inductive signal includes N periods each having a different duration, and wherein N is a positive integer equal to or greater than 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.