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:
Oct. 16, 2018
Filed:
Dec. 10, 2014
Applicant:
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Inventors:
Atsushi Yamashita, Osaka, JP;
Manabu Onozaki, Osaka, JP;
Tsuyoshi Ono, Osaka, JP;
Masataka Miyata, Osaka, JP;
Assignee:
SHARP KABUSHIKI KAISHA, Sakai, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 7/22 (2018.01); H05B 33/08 (2006.01); F21Y 115/10 (2016.01);
U.S. Cl.
CPC ...
H05B 33/0815 (2013.01); F21V 7/22 (2013.01); H05B 33/086 (2013.01); H05B 33/0818 (2013.01); H05B 33/0845 (2013.01); H05B 33/0887 (2013.01); F21Y 2115/10 (2016.08);
Abstract
To provide a circuit for reducing an afterglow of secondary light, a circuit includes an LED () which includes an LED chip () and a KSF phosphor (), and a first output circuit () and a second output circuit () which are coupled to a cathode (C). When a PWM signal goes to 'H', the first output circuit is driven thereby making IF flow from the cathode. When the PWM signal goes to 'L', the first output circuit stops driving, and the second output circuit makes an offset current flow from the cathode.