Lamp current balancing device

Details Lamp current balancing device Lamp current balancing device

2007-08-07

2007-08-07

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S291000, C315S219000, C315S255000, C315S274000, C315S277000

Reexamination Certificate

active

11233137

ABSTRACT:
A lamp current balancing device comprises an electronic power switch, a transformer, a current transformer and a pulse width modulation (PWM) IC; the transformer having a primary side connected to the electronic power switch and both ends of a secondary side connected to one end of each one of two lamps respectively, with another end of each one of the two lamps connecting to one end of a primary side of the current transformer respectively, the PWM IC being coupled between a secondary side of the current transformer and the electronic power switch; since the two lamps being cascaded in series with a same current flowing through them, thus providing current balancing capability, furthermore, the current transformer being used to detect an operating current of the lamps and to feed back the operating current to the PWM IC, the PWM IC receiving and processing the operating current to obtain a control signal, then outputting the control signal to the electronic power switch to control a pulse width outputted by the electronic power switch, thereby controlling and maintaining a uniform brightness of the lamps.

REFERENCES:
patent: 6114814 (2000-09-01), Shannon et al.
patent: 7164240 (2007-01-01), Moyer et al.
patent: 2005/0218827 (2005-10-01), Ushijima et al.
patent: 2005/0225261 (2005-10-01), Jin
U.S. Appl. No. 11/225,066, filed Sep. 14, 2005, by Hsu.
U.S. Appl. No. 11/335,655, filed Jan. 20, 2006, by Hsu et al.

Affiliated with

Also associated with

Rating

Lamp current balancing device does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3873692