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. 08, 2025
Filed:
Oct. 12, 2021
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 45/54 (2020.01); B60Q 1/14 (2006.01); B60Q 1/30 (2006.01); B60Q 1/32 (2006.01); H05B 45/44 (2020.01); H05B 47/16 (2020.01);
U.S. Cl.
CPC ...
H05B 45/54 (2020.01); H05B 45/44 (2020.01); H05B 47/16 (2020.01); B60Q 1/14 (2013.01); B60Q 1/30 (2013.01); B60Q 1/32 (2013.01);
Abstract
A semiconductor integrated circuit for driving a light emitting element forms at least part of a light emitting element driving device configured to change the number of light emitting elements that are lit among a plurality of light emitting elements connected in series. The semiconductor integrated circuit includes a variable resistor controller configured to increase the resistance value of a variable resistor connected in series with the plurality of light emitting elements immediately before, or at the same time as, the time point at which the number of light emitting elements that are lit is reduced.