Title:
A lighting device and a light
Document Type and Number:
Japanese Patent JP6153112
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a lighting device and the like which allows for stabilized lighting of solid light-emitting elements of different characteristics, where variation of optical output is suppressed with simple configuration.SOLUTION: A lighting device 1a for lighting an LED 4 has a DC power supply C1, a back converter 3, and a control circuit 5. The back converter 3 has a switching element Q1, an inductor L1, and a diode D1. The control circuit 5 has a current detection circuit 6 for detecting a current flowing through the switching element Q1, a voltage detection circuit 8 for detecting the voltage across the LED4 or the voltage across the inductor L1, a drive circuit 10 for turning the switching element Q1 off when detecting a fact that the current detected by the current detection circuit 6 has reached a predetermined current command value, and a correction circuit 9 for correcting the current command value depending on a voltage detected by the voltage detection circuit 8.
Inventors:
Daisuke Yamahara
Takeshi Kamoi
Keisuke Seki
Takeshi Kamoi
Keisuke Seki
Application Number:
JP2013161831A
Publication Date:
June 28, 2017
Filing Date:
August 02, 2013
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
H05B37/02; H02M3/155
Domestic Patent References:
| JP2012109141A | ||||
| JP2006222377A | ||||
| JP2010040509A | ||||
| JP2014229561A |
Attorney, Agent or Firm:
Hiromori Arai
Eisaku Teratani
Shinichi Michisaka
Eisaku Teratani
Shinichi Michisaka
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