Computer graphics processing and selective visual display system – Display peripheral interface input device – Stylus
Reexamination Certificate
2006-06-20
2006-06-20
Eisen, Alexander (Department: 2674)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Stylus
C345S173000
Reexamination Certificate
active
07064750
ABSTRACT:
The present invention relates to a device intended for locating the tip of a pen on a writing board, the pen and the board being part of a writing digitizing system further comprising at least two magnetic dipoles, each being coupled with a current source so as to create distinct magnetic fields which are perpendicular to the writing board.According to the invention, the pen comprises a first sensor intended for measuring the magnetic fields produced by each magnetic dipole, and a second sensor intended for measuring the inclination angle θ of the pen with respect to the vertical, and transmission means for delivering data supplied by the first and second sensors to a processing unit to compute the position of the pen tip onto the writing surface in terms of the measured magnetic fields and angle θ values.
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Commissariat a l''Energie Atomique
Eisen Alexander
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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