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:
Mar. 10, 2026
Filed:
Jun. 22, 2023
Applicant:
Tdk Corporation, Tokyo, JP;
Inventor:
Yongfu Cai, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 5/16 (2006.01); G01D 5/14 (2006.01); G03B 30/00 (2021.01); H02K 11/215 (2016.01); H04N 23/54 (2023.01);
U.S. Cl.
CPC ...
G01D 5/16 (2013.01); G01D 5/147 (2013.01); G03B 30/00 (2021.01); H02K 11/215 (2016.01); H04N 23/54 (2023.01);
Abstract
A position detection device includes a magnetic field generator and a magnetic sensor. The magnetic field generator is configured so that a mode of variation of a direction of a target magnetic field relative to variations in a position of a lens is such that the direction of the target magnetic field varies nonlinearly relative to the variations in the position of the lens. The magnetic sensor is configured so that a mode of variation of a detection signal relative to variations in the direction of the target magnetic field is such that the detection signal varies nonlinearly relative to the variations in the direction of the target magnetic field.