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:
Dec. 27, 2016
Filed:
Nov. 24, 2015
Koito Manufacturing Co., Ltd., Tokyo, JP;
Tomoyuki Ichikawa, Shizuoka, JP;
Toshihiko Kurebayashi, Shizuoka, JP;
KOITO MANUFACTURING CO., LTD., Tokyo, JP;
Abstract
A lighting circuit is configured to turn on or off a semiconductor light source in accordance with a turning-on/off instruction signal. The lighting circuit includes a pulse input determining circuit and a drive circuit. The pulse input determining circuit receives the turning-on/off instruction signal which is in pulse form in commanding turning-on and which is at a constant level in commanding turning-off. The pulse input determining circuit determines whether or not the turning-on/off instruction signal is in a turn-on state in which the turning-on/off instruction signal is in pulse form. The pulse input determining circuit generates a determination signal which is asserted if the turning-on/off instruction signal is in pulse form. The drive circuit supplies the semiconductor light source with a drive current if the determination signal is asserted. The drive circuit does not supply the semiconductor light source with the drive current if the determination signal is negated.