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:
Nov. 05, 2019
Filed:
Feb. 10, 2017
Applicant:
Rohm Co., Ltd., Ukyo-Ku, Kyoto, JP;
Inventors:
Masao Yonemaru, Kyoto, JP;
Kenichi Fukumoto, Kyoto, JP;
Assignee:
ROHM CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/34 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
G09G 3/342 (2013.01); H05B 33/0815 (2013.01); G09G 2320/064 (2013.01); G09G 2320/0633 (2013.01);
Abstract
A control circuit of a driving circuit of a backlight LED is provided. The driving circuit includes a DC/DC converter that supplies a driving current to the backlight LED. The control circuit includes a pulse signal generating circuit configured to switch between a quasi-resonant mode and a continuous current mode to generate a pulse signal based on a selected mode and a driver configured to drive the DC/DC converter based on the pulse signal.