Title:
LIGHT SOURCE CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/161215
Kind Code:
A1
Abstract:
A semiconductor light source control device (100) is provided with: a flyback regulator (102) that converts a battery voltage (Vbat) to a target voltage (Vt); a flywheel diode (142) connected in parallel to an output capacitor (128) of the flyback regulator (102); a second switching element (140) provided on the path of a drive current (Iout) that from one end of the output capacitor (128), reaches multiple LEDs (2-1 to 2-N) to be driven, and from the multiple LEDs, returns to the other end of the output capacitor (128), said second switching element (140) being provided between the output capacitor (128) and the flywheel diode (142); and an inductor (144) provided on the path of the drive current (Iout), between the flywheel diode (142) and the multiple LEDs.
Inventors:
MURAMATSU TAKAO (JP)
ITO MASAYASU (JP)
YANAGIDU SHOUHEI (JP)
ITO MASAYASU (JP)
YANAGIDU SHOUHEI (JP)
Application Number:
PCT/JP2013/002576
Publication Date:
October 31, 2013
Filing Date:
April 16, 2013
Export Citation:
Assignee:
KOITO MFG CO LTD (JP)
International Classes:
H05B37/02
Foreign References:
| JP2012029534A | 2012-02-09 | |||
| JP2011233264A | 2011-11-17 | |||
| JPH10106763A | 1998-04-24 |
Attorney, Agent or Firm:
MORISHITA, SAKAKI (JP)
Sakaki Morishita (JP)
Sakaki Morishita (JP)
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