Fluorescent ballast with isolated system interface

Details Fluorescent ballast with isolated system interface Fluorescent ballast with isolated system interface

2005-03-22

2005-03-22

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S20000A, C315S220000, C315S277000, C315S291000, C315S307000

Reexamination Certificate

active

06870326

ABSTRACT:
A ballasting circuit is configured with a circuit having a capability of providing an isolated power supply to various external ballast accessories that interface with a circuit or device for determining the amount of illumination. The ballasting circuit also has a capability of providing isolated power for circuitry within itself such that they can be connected to communication wires external to a lighting fixture without the need of an additional power supply. The ballasting circuit includes one or more gas discharge lighting devices, a source of input power, an electronic ballasting circuit having a regulated direct current requirement and coupled between the one or more gas discharge lighting devices and the source of input power, a heater transformer, a low voltage direct current power supply, a switching device, a regulator circuit, a full wave rectifier, and windings.

REFERENCES:
patent: 4277728 (1981-07-01), Stevens
patent: 5371439 (1994-12-01), Griffin
patent: 5600211 (1997-02-01), Luger
patent: 5677602 (1997-10-01), Paul et al.
patent: 6072283 (2000-06-01), Hedrei et al.
patent: 6259215 (2001-07-01), Roman
patent: 6329761 (2001-12-01), Melis et al.
patent: 6696803 (2004-02-01), Tao et al.

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