Lighting controller for lighting device for vehicle

Details Lighting controller for lighting device for vehicle Lighting controller for lighting device for vehicle

2006-10-31

2008-05-06

Tran, Thuy V. (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S082000

Reexamination Certificate

active

07368885

ABSTRACT:
A lighting controller for a lighting device for a vehicle includes a semiconductor light source; a power source for supplying electric power; and control circuitry for receiving the electric power from the power source and controlling a current supplied to the semiconductor light source. The control circuitry determines an amount of time the semiconductor light source is in a turned on state and an amount of time the semiconductor light source is in a turned off state. The control circuitry controls a value of the current supplied to the semiconductor light source based on both the determined amount of time the semiconductor light source is in a turned on state and the determined amount of time the semiconductor light source is in a turned off state. A method of controlling a lighting device for a vehicle includes receiving electric power from a power source; supplying a current to a semiconductor light source, determining an amount of time the semiconductor light source is in a turned on state and an amount of time the semiconductor light source is in a turned off state, and controlling a value of the current supplied to the semiconductor light source based on both the determined amount of time the semiconductor light source is in a turned on state and the determined amount of time the semiconductor light source is in a turned off state.

REFERENCES:
patent: 6297761 (2001-10-01), Barrenscheen et al.
patent: 6320275 (2001-11-01), Okamoto et al.
patent: 7158361 (2007-01-01), Horn
patent: 2004/0217712 (2004-11-01), Takeda et al.
patent: 2004-330819 (2004-11-01), None

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