公开(公告)号：US20160073463A1

公开(公告)日：2016-03-10

申请号：US14943140

申请日：2015-11-17

Applicant: Rohm Co., Ltd.

Inventor： Eiichiro Niikura ,  Kazuaki Kitaga ,  Satoshi Yamada ,  Masamichi Iwaki

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/0815

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.

公开(公告)号：US09888538B2

公开(公告)日：2018-02-06

申请号：US14943140

申请日：2015-11-17

Applicant: Rohm Co., Ltd.

Inventor： Eiichiro Niikura ,  Kazuaki Kitaga ,  Satoshi Yamada ,  Masamichi Iwaki

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/0815

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.