LIGHTING DEVICE PROVIDED WITH LED ELEMENTS

Title:

LIGHTING DEVICE PROVIDED WITH LED ELEMENTS

Document Type and Number:

WIPO Patent Application WO/2014/046254

Kind Code:

A1

Abstract:

[Problem] To provide a lighting device that uses simple-shaped light-emitting diodes (LEDs). [Solution] A lighting device that uses LEDs is characterized by being provided with an LED group (250) comprising a plurality of LEDs (252) connected in series, and a drive circuit (550) that supplies a light emission current to the LED group. The lighting device is further characterized in that: the drive circuit (550) has a parallel circuit having a peak current setting capacitor (222) and a resistor (220), which is connected in parallel to the peak current setting capacitor (222), and a full-wave rectifier circuit (230); the LED group (250) is connected to an output terminal of the full-wave rectifier circuit; the capacity of the peak current setting capacitor is a value within a region exhibiting a property in which the peak value of a pulsating current increases on the basis of an increase in the capacity of the peak current setting capacitor; and the pulsating current, which has a cutoff period determined on the basis of the number of serially-connected LEDs in the LED group and has a peak value that is determined on the basis of the capacity of the peak current setting capacitor, is supplied to the LED group.

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Inventors:

TAKATSU AKIO (JP)

Application Number:

PCT/JP2013/075553

Publication Date:

March 27, 2014

Filing Date:

September 20, 2013

Export Citation:

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Assignee:

HONDA KOUICHI (JP)

International Classes:

H05B37/02; F21S2/00; H05B44/00; F21V3/02; F21V19/00; F21V23/00; F21V29/00; F21Y101/02

Foreign References:

JP2000306685A	2000-11-02
JPH1197747A	1999-04-09
JP2003332625A	2003-11-21
JP2011113958A	2011-06-09
JP2005009093A	2005-01-13
JP2008010305A	2008-01-17
JP2012129090A	2012-07-05
JP2012069303A	2012-04-05

Other References: