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:
Mar. 15, 2016
Filed:
Oct. 25, 2013
Applicant:
Sharp Kabushiki Kaisha, Osake, JP;
Inventor:
Masahiro Hirokane, Osaka, JP;
Assignee:
SHAPR KABUSHIKI KAISHA, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01); H05B 33/08 (2006.01); G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0818 (2013.01); G02F 1/133603 (2013.01); H05B 37/02 (2013.01); G02F 2001/133612 (2013.01);
Abstract
As a result of being provided with an enable signal generating unit that supplies, to an LED driver, an enable signal that is dependent on a low state period of a PWM signal, it is possible to realize a light emitting diode driver circuit that can suppress a booster circuit starting up suddenly and an excess current flowing in a power source in the case where the PWM signal enters a high state (on state) after having been held in a low state (off state) for a prescribed period or longer.