Headlamp control circuit

Details Headlamp control circuit Headlamp control circuit

2007-08-22

2010-02-09

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Special application

Vehicle

C307S010800

Reexamination Certificate

active

07659670

ABSTRACT:
A headlamp control circuit reduces a possibility that all headlamps become lights-out in a two-lamp system headlight, even if a switching element fails under a high-beam condition while the single switching element is driven to light two right and left high-beam filaments. A headlamp control circuit includes switch sections (SW1) and (SW2) for lighting low-beam filaments (21) and (31), a switch section (SW3) for lighting high-beam filaments (22) and (32) together, a diode (D1) for detecting an output voltage on the switch section SW3, and a control section (120) for turning the switch section (SW3) to an on-condition in the case where a high-beam indication is accepted and for turning the switch sections (SW1) and (SW2) to an on-condition in the case where a low-beam indication is accepted and in the case where a high-beam indication is accepted and the diode (D1) detects no high-beam lighting voltage.

REFERENCES:
patent: 4899083 (1990-02-01), Kataoka et al.
patent: 5517064 (1996-05-01), Murakami
patent: 5661368 (1997-08-01), Deol et al.
patent: 6281631 (2001-08-01), Schaffer et al.
patent: 6452337 (2002-09-01), Murata
patent: 6566816 (2003-05-01), Fushimi et al.
patent: 6734634 (2004-05-01), Kim
patent: 6958897 (2005-10-01), Kubota et al.
patent: 7075237 (2006-07-01), Sato et al.
patent: 2006/0097765 (2006-05-01), Asada
patent: 2000-233679 (2000-08-01), None
patent: 2002-144958 (2002-05-01), None
patent: 2004-291819 (2004-10-01), None
Infineon Profet ITS428L2—Smart High-Side Power Switch for Industrial Applications Mar. 16, 2006—pp. 1-13.

Affiliated with

Also associated with

Rating

Headlamp control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Headlamp control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Headlamp control circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4162806