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:
Oct. 15, 2024
Filed:
Sep. 13, 2023
Alps Alpine Co., Ltd., Tokyo, JP;
Teiichi Ichikawa, Fukushima, JP;
Shohei Yoshida, Fukushima, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
A proximity detection device according to the present invention includes: a plurality of light emitting elements; a plurality of light receiving elements; a drive circuit configured to sequentially drive the plurality of light emitting elements; a measurement circuit configured to measure a light reception signal of a corresponding light receiving element when the plurality of light emitting elements are sequentially driven; and a control unit configured to i) control a drive current of a light emitting element such that a light emission amount of the light emitting element is suppressed, and ii) amplify a detection signal of a light receiving element to compensate for the suppressed light emission amount during measurement with a relatively short distance between the light emitting element and the light receiving element.