Capacitive motion detection device and input device using the same
US8194049B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2009 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Jul 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When a motion in the X-axis direction is detected, first electrodes are set as drive electrodes, and second electrodes are set as detection electrodes. A switching circuit performs switching so as to electrically connect a drive circuit to the first electrodes, electrically connect a first detection circuit to one of the second electrodes, and electrically connect a second detection circuit to the other second electrode. In a motion detection circuit in which connections are established in this manner, the drive circuit drives the drive electrodes, and then the position of an object to be detected in the X-axis direction is obtained from the difference between capacitances detected by the first and second detection circuits at this time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.