US 2014/0368120 A1 · BALLAST WITH ANTI-STRIATION CIRCUIT

Abstract

A ballast comprises an inverter circuit for providing an oscillating current signal for energizing the at least one lamp. The inverter circuit comprises a first switching component and a second switching component each having a collector terminal, a base terminal, and an emitter terminal. And, each switching component is configured for alternately operating between a conductive state and a non-conductive state. A first collector-emitter circuit is connected between the collector terminal and the emitter terminal of the first switching component, wherein the first collector-emitter circuit has a first resistance of zero or more Ohms. A second collector-emitter circuit is connected between the collector terminal and the emitter terminal of the second switching component, wherein the second collector-emitter circuit has a second resistance of zero or more Ohms and the first resistance and the second resistance are unequal.

Claims14

Dependent claims

A ballast comprising:

an inverter circuit to provide an oscillating current signal to energize at least one lamp, wherein the inverter circuit comprises:
a first switching component having a collector terminal, a base terminal, and an emitter terminal, wherein the first switching component is configured to alternately operate between a conductive state and a non-conductive state;
a first collector-emitter circuit connected between the collector terminal and the emitter terminal of the first switching component, wherein the first collector-emitter circuit has a first resistance of zero or more Ohms;
a second switching component having a collector terminal, a base terminal, and an emitter terminal, wherein the second switching component is configured to alternately operate between a conductive state and a non-conductive state;
and
a second collector-emitter circuit connected between the collector terminal and the emitter terminal of the second switching component, wherein the second collector-emitter circuit has a second resistance of zero or more Ohms;
wherein the first resistance and the second resistance are unequal.

4 more elements

A ballast comprising:

an inverter circuit to provide an oscillating current signal to energize at least one lamp, wherein the inverter circuit comprises:
a first switching component having a collector terminal, a base terminal, and an emitter terminal, wherein the first switching component is configured to alternately operate between a conductive state and a non-conductive state;
a first diode connected between the collector terminal and the emitter terminal of the first switching component;
a second switching component having a collector terminal, a base terminal, and an emitter terminal, wherein the second switching component is configured to alternately operate between a conductive state and a non-conductive state, wherein the collector terminal of the second switching component is connected to the emitter terminal of the first switching component;
a second diode connected between the collector terminal and the emitter terminal of the second diode;
and
a resistive component connected in series with the first diode between the collector terminal and the emitter terminal of the first switching component so a greater resistance is generated across the collector terminal and the emitter terminal of the first switching component than is generated across the collector terminal and the emitter terminal of the second switching component.

4 more elements

A ballast comprising:

an inverter circuit for providing an oscillating current signal to energize at least one lamp, wherein the inverter circuit comprises:
a first switching component having a collector terminal, a base terminal, and an emitter terminal, wherein the first switching component is configured to alternately operate between a conductive state and a non-conductive state;
a first diode connected between the collector terminal and the emitter terminal of the first switching component;
a second switching component having a collector terminal, a base terminal, and an emitter terminal, wherein the second switching component is configured to alternately operate between a conductive state and a non-conductive state, wherein the collector terminal of the second switching component is connected to the emitter terminal of the first switching component;
a second diode connected between the collector terminal and the emitter terminal of the second diode;
and
a resistive component connected in series with the second diode between the collector terminal and the emitter terminal of the second switching component so a greater resistance is generated across the collector terminal and the emitter terminal of the second switching component than is generated across the collector terminal and the emitter terminal of the first switching component.

4 more elements

Dependencies are inferred from the claim text.

Ballast with anti-striation circuit

Life of this patent

Ballast with anti-striation circuit

Life of this patent

Abstract

Claims14