Telegraphy – Systems – Position coordinate determination for writing
Patent
1984-03-02
1986-03-18
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
178 19, G08C 2100
Patent
active
045770573
ABSTRACT:
A digitizing tablet system of the type including a tablet, a stylus and associated electronics which is constructed to correct for tilt errors when the stylus axis is tilted relative to the tablet is disclosed. The tablet includes a housing having a rectangular coordinate grid of electrical conductors. The stylus includes an elongated tubular member having a tip at one end, a first coil which is located at a first axial distance from the tip and a second coil which is located at a second axial distance from the tip, the second distance being different from the first distance. A voltage signal is applied to each coil sequentially. The signal applied to each coil induces a voltage in each conductor in the grid. The induced voltages are processed to produce a first and a second data signal, the first data signal corresponding to the position of the first coil relative to the grid and the second data signal corresponding to the position of the second coil relative to the grid, with the difference in the two data signals, if any, being caused by tilt of the stylus. The two data signals are then processed to produce a third data signal corresponding to the position of the tip of the stylus relative to the grid of conductive elements.
REFERENCES:
patent: 3700809 (1972-10-01), Nadon
patent: 3705956 (1971-01-01), Dertouzos
patent: 3735044 (1973-05-01), Centner et al.
patent: 3873770 (1975-03-01), Ioannou
patent: 3999012 (1976-12-01), Dym
patent: 4088842 (1978-05-01), Ikedo
patent: 4240065 (1980-12-01), Howbrook
patent: 4246439 (1981-01-01), Romein
patent: 4289927 (1981-09-01), Rodgers
patent: 4368351 (1983-01-01), Zimmer
patent: 4375081 (1983-02-01), Blesser
Asher Robert M.
Pencept, Inc.
Schreyer Stafford D.
LandOfFree
Digitizing tablet system having stylus tilt correction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digitizing tablet system having stylus tilt correction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digitizing tablet system having stylus tilt correction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2307428