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:
Nov. 03, 1998
Filed:
Aug. 05, 1996
Kinya Inoue, Iwaki, JP;
Alps Electric Co., Ltd., , JP;
Abstract
A coordinate input apparatus capable of preventing inaccurate detection of a position caused by chattering or a disturbed timing, thereby ensuring accurate detection of a position. Open check for determining whether the resistance of contact between a first resistive film and a second resistive film exceeds a preset value for a predetermined time is carried out before and after obtaining a signal of an X-coordinate position and also before and after obtaining a signal of a Y-coordinate position. In addition, there is provided a processing circuit, which detects the signals from tablet electrodes for multiple times within a predetermined time to obtain the position signals, converts them into digital values, calculates the difference between the values, and performs arithmetic processing and output only if the difference is a reference value or less.