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:
Dec. 14, 2021
Filed:
Aug. 26, 2020
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Hiroshi Yoshida, Kanagawa, JP;
Shoji Ootaka, Kanagawa, JP;
Katsuya Nonin, Kanagawa, JP;
Masaki Nishikawa, Kanagawa, JP;
Masayoshi Oshiro, Tokyo, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo, JP;
Abstract
A distance measurement apparatus of an embodiment includes a first device provided in a vehicle and a second device provided in a key-fob, and calculates a distance between the vehicle and the key-fob based on carrier phase detection. In at least one of the first device and the second device, transmission powers at which a plurality of first distance measurement signals are respectively transmitted when the key-fob is inside the vehicle are set to be lower than transmission powers at which a plurality of first distance measurement signals are respectively transmitted when the key-fob is outside the vehicle.