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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.:

US 11910504 B1

PDFFull Text
Date of Patent:
Feb. 20, 2024

Filed:

Mar. 10, 2021

Light source module and lighting circuit

Applicant:

Koito Manufacturing Co., Ltd., Tokyo, JP;

Inventors:

Tomoyuki Ichikawa, Shizuoka, JP;

Atsushi Ozawa, Shizuoka, JP;

Mariko Miwa, Shizuoka, JP;

Yutaka Matsumoto, Shizuoka, JP;

Assignee:

KOITO MANUFACTURING CO., LTD., Tokyo, JP;

Attorney:

Pearne & Gordon LLP

Primary Examiner:

Wei (Victor) Y Chan

Int. Cl.
CPC ...
H05B 45/54 (2020.01); H05B 45/345 (2020.01); B60Q 11/00 (2006.01); F21V 29/76 (2015.01); B60Q 1/30 (2006.01); B60Q 1/44 (2006.01); H05B 45/20 (2020.01); H05B 45/325 (2020.01); H05B 45/36 (2020.01);
U.S. Cl.
CPC ...
H05B 45/54 (2020.01); B60Q 11/005 (2013.01); H05B 45/345 (2020.01); B60Q 1/303 (2022.05); B60Q 1/44 (2013.01); F21V 29/763 (2015.01);
Abstract

There is provided a rear sign lamp capable of enhancing safety. An LED string () includes four LEDs (_to_) connected in series. An LED driver circuit () receives a battery voltage (V) and supplies a drive current (I) stabilized at a target current (I) to the LED string (). A bypass circuit () is provided in parallel with a bypassed portion () including two adjacent LEDs (_and_) of the LED string (), and sinks a bypass current (I) according to a battery voltage (V).

Find Patent Forward Citations

Ichikawa, Tomoyuki. (2024). Light source module and lighting circuit (U.S. Patent No. 11910504). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11910504

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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