Patent ID: 9204504
Filing Date: 2015-12-01
Classification: H05B,Y02B

Abstract:
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: d) wherein the three-wire magnetic ballast is configured so that: