Title:
LED LIGHTING DEVICE
Document Type and Number:
Japanese Patent JP2013218918
Kind Code:
A
Abstract:
To improve attention arousing performance to a driver of a subsequent vehicle without adding excessive stress to an LED and a lighting device.
A brightness and darkness determination part 10a determines that circumstances of a vehicle are bright when a switch 2t for a tail lamp is turned off, and determines that the circumstances are dark when the switch is turned on. A control part 10 controls a DC/DC converter part 12 to make an LED 11s for a stop lamp perform normal lighting when the circumstances of the vehicle are dark, and shortens a time from a power feed starting time to normal lighting to steeply turn on the LED 11s when the circumstances are bright.
Inventors:
KONO YASUHIKO
Application Number:
JP2012089342A
Publication Date:
October 24, 2013
Filing Date:
April 10, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H05B37/02
Domestic Patent References:
| JP2005029019A | 2005-02-03 | |||
| JP2004237963A | 2004-08-26 | |||
| JPH0964411A | 1997-03-07 | |||
| JP2007230382A | 2007-09-13 |
Foreign References:
| WO2007069371A1 | 2007-06-21 |
Attorney, Agent or Firm:
Hideaki Tazawa
Hamada Hatsune
Kume Teruyo
Hideo Kawamura
Hamada Hatsune
Kume Teruyo
Hideo Kawamura