LED lamp system
First Claim
1. An LED lamp system designed to fit into a fluorescent lamp fixture and to utilize a fluorescent lamp power supply contained in the fluorescent lamp fixture;
- the fluorescent lamp power supply receiving power from AC mains and having a ballast condition that can be at least either a two-wire magnetic ballast or a three-wire magnetic ballast;
the LED lamp system including an LED driver arrangement which comprises;
a) a power factor corrected driver circuit for presenting a power factor to the AC mains of at least about 0.8 when either a two-wire magnetic ballast or a three-wire magnetic ballast is present in the fluorescent lamp power supply; and
b) a logic and electrical condition current control circuit, responsive to the presence of a three-wire magnetic ballast in the fluorescent lamp power supply for increasing an LED operating current above a nominal rated LED operating current and to a level sufficient to achieve power factor of the LED driver arrangement of at least about 0.8;
c) wherein the two-wire magnetic ballast is configured so that;
i) first and second conductors from a power source applying a potential therebetween are respectively coupled directly to a first end of said LED lamp system and to a first terminal of the two-wire magnetic ballast;
ii) said LED lamp system receives power from said first conductor and from a third conductor connected between a second terminal of the two-wire magnetic ballast and a second end of said LED system; and
iii) said lamp system has a power factor greater than 0.8 when operated from a two-wire magnetic ballast; and
d) wherein the three-wire magnetic ballast is configured so that;
i) first and second conductors from a power source applying a voltage potential therebetween are respectively coupled directly to two terminals of the three-wire magnetic ballast;
ii) said LED lamp system receives power from said first conductor at a first end of said LED lamp system and from a third conductor at a second end of said LED lamp system connected to a further terminal of the three-wire magnetic ballast;
iii) when powering a fluorescent lamp, said three-wire ballast attains a power factor of greater than 0.8; and
iv) said lamp system has a power factor below 0.8 when the LED operating current is at the nominal rated LED operating current.
3 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is an LED lamp system designed to fit into a fluorescent lamp fixture and to utilize a fluorescent lamp power supply contained in the fixture and receiving power from AC mains. The LED lamp system includes an LED driver which comprises a power factor corrected driver circuit for achieving a power factor of at least about 0.8. The LED driver further comprises a current control circuit, responsive to the presence of a three-wire magnetic ballast in the fluorescent lamp power supply, for increasing the LED operating current above the nominal rated LED operating current and to a level sufficient to achieve power factor of the LED driver of at least about 0.8.
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Citations
10 Claims
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1. An LED lamp system designed to fit into a fluorescent lamp fixture and to utilize a fluorescent lamp power supply contained in the fluorescent lamp fixture;
- the fluorescent lamp power supply receiving power from AC mains and having a ballast condition that can be at least either a two-wire magnetic ballast or a three-wire magnetic ballast;
the LED lamp system including an LED driver arrangement which comprises;a) a power factor corrected driver circuit for presenting a power factor to the AC mains of at least about 0.8 when either a two-wire magnetic ballast or a three-wire magnetic ballast is present in the fluorescent lamp power supply; and b) a logic and electrical condition current control circuit, responsive to the presence of a three-wire magnetic ballast in the fluorescent lamp power supply for increasing an LED operating current above a nominal rated LED operating current and to a level sufficient to achieve power factor of the LED driver arrangement of at least about 0.8; c) wherein the two-wire magnetic ballast is configured so that; i) first and second conductors from a power source applying a potential therebetween are respectively coupled directly to a first end of said LED lamp system and to a first terminal of the two-wire magnetic ballast; ii) said LED lamp system receives power from said first conductor and from a third conductor connected between a second terminal of the two-wire magnetic ballast and a second end of said LED system; and iii) said lamp system has a power factor greater than 0.8 when operated from a two-wire magnetic ballast; and d) wherein the three-wire magnetic ballast is configured so that; i) first and second conductors from a power source applying a voltage potential therebetween are respectively coupled directly to two terminals of the three-wire magnetic ballast; ii) said LED lamp system receives power from said first conductor at a first end of said LED lamp system and from a third conductor at a second end of said LED lamp system connected to a further terminal of the three-wire magnetic ballast; iii) when powering a fluorescent lamp, said three-wire ballast attains a power factor of greater than 0.8; and iv) said lamp system has a power factor below 0.8 when the LED operating current is at the nominal rated LED operating current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- the fluorescent lamp power supply receiving power from AC mains and having a ballast condition that can be at least either a two-wire magnetic ballast or a three-wire magnetic ballast;
Specification