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. 14, 2026
Filed:
Jun. 02, 2023
Koito Manufacturing Co., Ltd., Tokyo, JP;
Shigemi Ishima, Shizuoka, JP;
KOITO MANUFACTURING CO., LTD., Tokyo, JP;
Abstract
Provided is a light-emitting device capable of turning on a plurality of light sources with a simple configuration. The light-emitting device includes n (n≥2) light sources, n power supply circuits each provided for the n light sources, and a switch provided between a ground-side node of each of the n light sources and a ground. Each power supply circuit generates a power supply voltage for a corresponding one of the n light sources on the basis of a first signal, and stops generating the power supply voltage on the basis of a second signal, and the switch is turned on the basis of a light-on instruction and is turned off on the basis of a light-off instruction when the power supply voltage for the one light source is generated.