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. 23, 2024
Filed:
Jul. 19, 2022
Applicant:
Koito Manufacturing Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
KOITO MANUFACTURING CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 45/18 (2020.01); H05B 45/345 (2020.01);
U.S. Cl.
CPC ...
H05B 45/18 (2020.01); H05B 45/345 (2020.01);
Abstract
An automotive lamp includes a temperature-sensing element having an electrical state that changes according to the temperature T of a semiconductor light source, and a constant current driver that generates a driving current Ithat corresponds to the temperature T. The maximum value of the temperature differential of the driving current Iin a first temperature range from a reference temperature Tto a first temperature T(T>T) is smaller than the maximum value of the temperature differential of the driving current Iin a second temperature range from the first temperature Tto a second temperature T(T>T).