Electronic writing systems and methods
US7342575B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2004 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | May 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03545
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Electronic writing systems and methods are described. In one aspect, an electronic writing system includes an elongated housing, an inertial sensor, an optical sensor, and a tracking module. The elongated housing has an optical input. The inertial sensor is attached to the housing and is operable to generate data indicative of movement of the housing relative to an inertial reference frame. The optical sensor is attached to the housing and is operable to generate data from light received through the optical input. The tracking module is operable to compute relative displacement data from inertial movement data corresponding to data generated by the inertial sensor. The tracking module also is operable to detect at least one calibrated position from calibration data encoded in optical data generated from light received by the optical sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.