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:
Jul. 22, 2025
Filed:
Dec. 21, 2023
Alps Alpine Co., Ltd., Tokyo, JP;
Alps Alpine Co., Ltd., Tokyo, JP;
Abstract
A coordinate input apparatus includes an insulating substrate, sensor electrodes having detecting positions, a top panel including an operating surface that allows an operation with a pointer and covering the sensor electrodes, a measuring circuit that measures capacitances of the detecting positions, and a calculating circuit that calculates a position of the pointer in two-axis directions of the operating surface, wherein, at a detecting position at which a maximum measured value is obtained and detecting positions next to the detecting position, the calculating circuit applies a quadratic curve to the maximum value and the measured values measured at the adjacent detecting positions to calculate a position of a vertex of the quadratic curve, and wherein, when the detecting position at which the maximum value is obtained is at an extreme end in either of the two-axis directions, the calculating circuit corrects the position of the pointer toward the extreme end.