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. 30, 2024
Filed:
Oct. 02, 2019
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Shunpei Yamazaki, Tokyo, JP;
Takayuki Ikeda, Kanagawa, JP;
Kiyotaka Kimura, Kanagawa, JP;
Yuki Tamatsukuri, Kanagawa, JP;
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Abstract
A vehicle alarm device () having a novel structure is provided. The vehicle alarm device () includes a sound-source detection device (), and the sound-source detection device () includes a plurality of microphones () and a delay circuit (). As a transistor included in a signal retention circuit () inside the delay circuit (), a transistor including an oxide semiconductor (OS transistor) is used. By the sound-source detection device (), an extraneous sound is obtained and the sound-source position of the extraneous sound is identified. In the case where it is judged from the relative velocity or the like between the sound source whose position has been identified and the vehicle that the sound source and the vehicle are likely to collide, an acoustic signal for calling attention of the vehicle occupant is output.