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:
Dec. 22, 2015
Filed:
Jul. 03, 2012
Eiichiro Niikura, Kyoto, JP;
Kazuaki Kitaga, Kyoto, JP;
Satoshi Yamada, Kyoto, JP;
Masamichi Iwaki, Kyoto, JP;
Eiichiro Niikura, Kyoto, JP;
Kazuaki Kitaga, Kyoto, JP;
Satoshi Yamada, Kyoto, JP;
Masamichi Iwaki, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A driving current generation circuit includes a semiconductor device configured to operate with a variable voltage as a reference voltage, a driving current generator configured to generate a driving current for driving an LED (Light Emitting Diode) based on an instruction received from the semiconductor device, and a dimming voltage converter configured to generate a second dimming voltage set based on the variable voltage from a first dimming voltage set based on a ground voltage, wherein the semiconductor device performs a driving control of the driving current generator based on the second dimming voltage.