Lighting circuit

Details Lighting circuit Lighting circuit

2005-03-15

2005-03-15

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S077000

Reexamination Certificate

active

06867557

ABSTRACT:
A lighting circuit for lighting a vehicular lamp including a plurality of light sources each having at least one light-emitting diode, includes: a switching regulator for outputting an output voltage based on a power-supply voltage received from an external DC power supply; a light source selecting unit for selecting the respective light sources one by one and supplying a supply current to a selected one light source by applying the output voltage of the switching regulator to the selected one light source; and an output controlling unit for controlling the output voltage output by the switching regulator to the selected one light source based on the supply current supplied to the selected one light source.

REFERENCES:
patent: 5693986 (1997-12-01), Vettraino et al.
patent: 6515434 (2003-02-01), Biebl
patent: 6798152 (2004-09-01), Rooke et al.
patent: 61-48836 (1986-04-01), None
patent: 2001-215913 (2001-08-01), None
ESP@CENET Database—12, Publication No. JP2001215913, Publication Date: Aug. 10, 2001.

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