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:
May. 30, 2023
Filed:
Mar. 08, 2019
Koito Electric Industries, Ltd., Shizuoka, JP;
Tadashi Fujii, Aichi, JP;
Hideto Sanui, Aichi, JP;
Jun Ito, Aichi, JP;
Hajime Suzuki, Aichi, JP;
Youmei Kaminaga, Shizuoka, JP;
Takayuki Izumi, Shizuoka, JP;
Kazuo Maruyama, Shizuoka, JP;
KOITO ELECTRIC INDUSTRIES, LTD., Shizuoka, JP;
Abstract
A lighting device includes an indoor lamp (), being provided in the cabin of a railroad vehicle () in order to wholly irradiate the inside of the cabin over the longitudinal direction of the vehicle, a vehicle body power supply (), supplying electric power to the indoor lamp (), and a storage battery (), being charged with a voltage applied by the vehicle body power supply (). The indoor lamp () includes a general lamp light source () and a standby lamp light source (), being lighted at an illuminance lower than that at which the general lamp light source () is lighted, and the general lamp source () being supplied with electric power from the vehicle body power supply () not through the storage battery (), while the standby lamp light source () being supplied with electric power from the vehicle body power supply () through the storage battery (). In an emergency, electric power is supplied from the storage battery () only to the standby lamp light source (), and the standby lamp light source () is continued to be lighted at the low illuminance.