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:
Jun. 01, 2021
Filed:
Oct. 11, 2018
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventors:
Yukihiro Iwamoto, Kyoto, JP;
Masaya Hirakawa, Kyoto, JP;
Assignee:
ROHM CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/327 (2006.01); G01R 27/26 (2006.01); H02H 1/00 (2006.01); H03K 17/96 (2006.01); G01R 31/00 (2006.01); H02H 3/00 (2006.01); G01R 31/28 (2006.01);
U.S. Cl.
CPC ...
G01R 31/3277 (2013.01); G01R 27/2605 (2013.01); G01R 31/005 (2013.01); G01R 31/2829 (2013.01); H02H 1/0007 (2013.01); H03K 17/962 (2013.01); H03K 17/9622 (2013.01); H02H 3/00 (2013.01); H03K 2217/94026 (2013.01);
Abstract
A controller controls a plurality of sensor electrodes. To a plurality of sense pins, the plurality of sensor electrodes are connected. A plurality of capacitance detection circuits respectively measure capacitance values of the corresponding sense pins. A calibration circuit calibrates the plurality of capacitance detection circuits. A relative relationship among the respective capacitance values of the plurality of sense pins is used for abnormality detection.