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:
Oct. 15, 2024
Filed:
Mar. 07, 2024
Toshiba Lighting & Technology Corporation, Kanagawa, JP;
Daisuke Kosugi, Ehime-ken, JP;
Toshiba Lighting & Technology Corporation, Kanagawa, JP;
Abstract
A vehicle lighting device includes: a socket; a substrate provided on one end side of the socket; a light-emitting element provided on the substrate; a control element provided on the substrate and including a current driver whose output side is electrically connected to the light-emitting element and a current setting circuit whose output side is electrically connected to the current driver; a first circuit provided on the substrate, electrically connected to a first input side of the current setting circuit, and whose resistance value changes depending on an ambient temperature of the light-emitting element; and a second circuit provided on the substrate, electrically connected to a second input side of the current setting circuit, and whose resistance value changes depending on the ambient temperature of the light-emitting element. Amount or ratio of output current flowing to the light-emitting element is changed according to an ambient temperature of the light-emitting element.