LED lighting device and illuminating device

Patent metadata

Field	Value
Publication number	US-9155143-B2
Application number	US-201414252339-A
Country	US
Kind code	B2
Filing date	Apr 14, 2014
Priority date	Nov 9, 2009
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

According to one embodiment, an LED lighting device comprises at least one normally-on type switching element, an output generation unit that generates DC output by an on-off operation of the switching element, a semiconductor light emitting element that is lit by the DC output generated by the output generation unit, and a driving control unit that causes the switching element to perform an off operation using a current passed through the semiconductor light emitting element.

First claim

What is claimed is:

1. A lighting device comprising:
an input end;
a chopper including:
a switching element electrically connected to the input end, the switching element having a control terminal,
a current control unit electrically connected to the switching element,
an inductor, a first current being passed in the inductor at least when the switching element is in an on state,
a diode, a second current being passed in the diode at least when the switching element is in…

Assignees

• Toshiba Lighting & Technology

Inventors

• Kitamura Noriyuki

Classifications

• H05B33/0815 Primary

  Electricity · mapped topic

• Y02B20/30

  Cross-Sectional Technologies · mapped topic

• H05B45/397

  Electricity · mapped topic

• H05B45/3725 Primary

  Electricity · mapped topic

• H05B45/39

  Electricity · mapped topic