Telegraphy – Systems – Position coordinate determination for writing
Patent
1990-09-17
1992-10-13
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
178 19, 338 2, G08C 2100
Patent
active
RE0340952
ABSTRACT:
A stylus switch is activated automatically when the tip of the stylus is pressed against a digitizer tablet with sufficent force. The pressure switch inlcudes a transducer in the form of an ink layer having electrical resistance which varies as a function of the pressure applied thereon. Electrodes of conductive ink contact the ink layer of the transducer, providing a circuit element including a variable resistance. The current which flows between the two conductive ink electrodes varies as a function of the force with which the stylus tip is pressed against the data tablet, thus providing an analog output which can be detected as a function of pressure or which can be detected to determine when the pressing force exceeds a predetermined value. Processing of the data representing the coordinates of the stylus tip is enabled only when the tip is being pressed with at least a predetermined force, i.e. the amount of force applied by a stylus user during writing. The ink layers of the electrodes and transducer, as well as the stylus anode, are applied on a single piece of flexible plastic film which is wrapped around a central assembly and inside a coaxial barrel. A collapsible dome of metal is arranged to provide tactile feedback to the user when the predetermined force is obtained.
REFERENCES:
patent: 3528295 (1970-09-01), Johnson et al.
patent: 4311980 (1982-01-01), Prudenziati
patent: 4318096 (1982-03-01), Thornburg et al.
patent: 4492819 (1985-01-01), Rodgers et al.
patent: 4532376 (1985-02-01), Rockwell
patent: 4580007 (1986-04-01), Searby et al.
patent: 4695680 (1987-09-01), Kable
Matthews Henry G.
Padula Michael J.
Schreyer Stafford D.
Summagraphics Corporation
LandOfFree
Digitizer stylus with pressure transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digitizer stylus with pressure transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digitizer stylus with pressure transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1292703