Title:
発光ダイオード駆動用半導体回路及び発光ダイオード駆動装置
Document Type and Number:
Japanese Patent JP4832313
Kind Code:
B2
Abstract:
A light emitting diode drives a semiconductor circuit in order to drive a light emitting diode that emits light by applying the output voltage of the rectifier circuit. The light emitting diode includes a switching element connected between the light emitting diode and the ground potential. An input voltage detection circuit detects the output voltage of the rectifier circuit to output a light emitting signal or a extinction signal. A current detection circuit detects the current flowing into the switching element. A control circuit intermittently controls on/off of the switching element at a predetermined oscillating frequency based on the output signal of the current detection circuit while the input voltage detection circuit is outputting the light emitting signal.
Inventors:
Kunimatsu Takashi
Application Number:
JP2006548883A
Publication Date:
December 07, 2011
Filing Date:
December 14, 2005
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H01L33/00; H05B37/02
Domestic Patent References:
| JP2004039289A | 2004-02-05 | |||
| JP2001313423A | 2001-11-09 | |||
| JPH0945481A | 1997-02-14 | |||
| JP2004214144A | 2004-07-29 |
Foreign References:
| WO2001045470A1 | 2001-06-21 |
Attorney, Agent or Firm:
Takuji Yamada
Mitsuo Tanaka
Kawabata Junichi
Mitsuo Tanaka
Kawabata Junichi