Position detecting device and position input device
US8665211B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2011 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Oct 19, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/047
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A position detecting device is provided, which is configured to minimize leakage of magnetic flux in an electromagnetic induction system. The position detecting device includes: a sensor unit including a plurality of first loop coils arranged in a first direction and a plurality of second loop coils arranged in a second direction intersecting with the first direction; a yoke sheet provided on a side of the sensor unit that is opposite to a side that faces a position indicator; an auxiliary loop coil provided at a corner part of the sensor unit; a signal transmitter configured to transmit a signal to one of the coils in order to generate a magnetic field to induce an induced current in a coil of the position indicator; and a controller configured to select one of the coils, and to control whether to transmit a signal from the signal transmitter to the selected one of the coils or to make the selected one of the coils receive a signal from the position indicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.