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:
Jan. 05, 2016
Filed:
Jan. 05, 2015
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventors:
Ryosuke Kanemitsu, Kyoto, JP;
Masaaki Nakayama, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 33/08 (2006.01); G02F 1/1335 (2006.01); G09G 3/34 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0815 (2013.01); G02F 1/133603 (2013.01); G09G 3/3406 (2013.01); H05B 33/089 (2013.01); H05B 33/0827 (2013.01); H05B 33/0887 (2013.01); G02F 2001/133612 (2013.01); G09G 2320/0626 (2013.01); G09G 2330/12 (2013.01);
Abstract
The present invention provides a light emitting diode (LED) driving device, which comprises: a direct current/direct current (DC/DC) controller, for controlling an output segment that is used to generate an output voltage from an input voltage and supply the output voltage to an LED; an output current driver, for generating an output current of the LED; and an output discharging circuit, for performing, based on a predetermined control signal, discharging of the output voltage when a generation action of the output voltage and the output current stops.