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:
Feb. 11, 2020
Filed:
Dec. 05, 2017
Yazaki Corporation, Tokyo, JP;
Terumitsu Sugimoto, Makinohara, JP;
Koji Ikegaya, Makinohara, JP;
YAZAKI CORPORATION, Minato-ku, Tokyo, JP;
Abstract
A light emitting device capable of reducing the number of parts while suppressing temperature rise of a light source board. Each of a plurality of LED units has an LED boards, and constant current boards. LED board is equipped with a blue LED, a red LED, and a green LED, LED board is equipped with a blue LED, a red LED, and a green LED. A constant board is equipped with a constant current circuit supplying constant current to the red LEDs and having the largest driving current. The constant current board is equipped with constant current circuits supplying constant current to the remaining blue LEDs, and the green LEDs.