The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1998
Filed:
Apr. 13, 1995
Takahiko Funahashi, Otone-machi, JP;
WACOM Co., Ltd., , JP;
Abstract
An angular information input system detects the inclined angle of a pointing device with a high accuracy without possible errors. This system is constituted so as to detect the induction voltage distribution in each axial direction generated by sensing coils (Ci) arranged under a display screen (16) by electromagnetic wave from a tuning circuit (34) contained in a pointing device (34). This system includes calculating means for calculating normalized values vpax, vpbx, vpay, and vpby in each axial direction by using a ratio between main peak voltage (Vp) representing the pointed coordinate by the pointing device (34) and auxiliary peak voltages (Vpa, Vpb). These normalized values are function parameters for calculating the inclined angles (.multidot..theta.x, .theta.y) in respective axial directions to input data representing the inclined angle .theta. and inclined direction of the pointing device into the associated computer.