3-Dimensional digitizer pen
US4806707A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1988 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Feb 12, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/228
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic pen for a digitizer capable of providing signals to a computer for pen movement in three dimensions relative to a planar tablet. There is a hollow, pen-shaped body member having a writing tip end. A sensing coil is disposed in the body member adjacent the writing tip end and having wires thereof connectable to the computer for use in developing X- and Y-axis positional signals relative to movement of the writing tip end over the surface of the tablet. A pen member is disposed in the body member for longitudinal slidable movement within the body member. The pen member has a writing tip passing out through the body member at the writing tip end and an opposite inner end. Finally, there is a linear position transducer disposed within the body member for producing on output wires therefrom connected to the computer Z-axis positional signals relative to the pressing of the writing tip end against the surface of the tablet. In the preferred embodiment, the linear position transducer comprises, a source of a light beam; an opto-sensor for developing a signal at an output thereof proportional to light impinging on an input surface thereof; and, a reflector operably connected …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.