Telegraphy – Systems – Position coordinate determination for writing
Patent
1994-08-05
1999-12-21
Shankar, Vijay
Telegraphy
Systems
Position coordinate determination for writing
178 1801, 178 1802, 178 1903, G08C 2100
Patent
active
060052007
ABSTRACT:
The invention concerns digitizing tablets in portable computers, wherein position of a stylus, located on the tablet, is computed. The invention corrects for various errors which creep into the computation, in order to produce a more accurate stylus position. The digitizing tablet has multiple sensors used to determine the stylus' position with respect to the digitizing tablet. Error signals are generated by measuring the sensors outputs when the stylus is not inducing a signal into the digitizing tablet. In one embodiment, these error signals are used to modify certain parameters used in calculating the stylus position.
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"Suppression of Noise in Speech)" IEEE Transactions on Speech, vol. ASSP.27, No. 2, Apr. 1979; p. 113-120.
Bruno Kevin J.
Keck John S.
Petty William K.
Stanchak Carl M.
Hyundai Electronics America
NCR Corporation
Shankar Vijay
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