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:
Aug. 06, 2024
Filed:
Sep. 10, 2021
Applicant:
Koito Manufacturing Co., Ltd., Tokyo, JP;
Inventors:
Tomoyuki Ichikawa, Shizuoka, JP;
Tetsuya Suzuki, Shizuoka, JP;
Atsushi Ozawa, Shizuoka, JP;
Toru Ito, Shizuoka, JP;
Assignee:
KOITO MANUFACTURING CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 45/30 (2020.01); H05B 45/345 (2020.01); F21Y 115/10 (2016.01);
U.S. Cl.
CPC ...
H05B 45/345 (2020.01); F21Y 2115/10 (2016.08);
Abstract
A semiconductor light source and a constant current circuit are arranged in series between an input terminal and a ground terminal. When an input voltage at the input terminal exceeds a predetermined threshold voltage, a load dump circuit cuts off or reduces a current that flows through the constant current circuit.