Baton and X, Y, Z, position sensor
US6222522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Sep 18, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2220/425
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A position sensor is used in conjunction with one or more batons, each baton having a transmitter that transmits a distinct radio frequency signal at a position in space. The position sensor determines the current position of each baton transmitter in terms of X, Y, and Z coordinates. The position sensor includes a tablet having a flat support member, with at least two pairs of electrodes coupled to the flat support member. Each of the electrodes is a separate antenna. A first pair of the electrodes is shaped so that the amount of capacitive coupling between each baton transmitter and the first pair of electrodes corresponds to the position of the baton transmitter with respect to the X axis. A second pair of the electrodes is shaped so that the amount of capacitive coupling between each baton transmitter and the second pair of electrodes corresponds to the position of the baton transmitter with respect to the Y axis. The regions forming the first pair electrodes are preferably interleaved with the regions forming the second pair of electrodes. The X, Y position of the baton can be computed with uniform accuracy anywhere in the X-Y plane by measuring the capacitance values between …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.