Patent ID: 8604721
Filing Date: 2013-12-10
Classification: H05B,Y02B

Abstract:
1. A lamp tube switch circuit for providing power to a lamp tube selected from one of different type of lamp tubes including at least a light emitting diode (LED) lamp tube and a fluorescent lamp tube, the switch circuit comprising: a first connector comprising first and second ports and a second connector comprising third and fourth ports, wherein the first and second ports are for connecting two pins on an end of the lamp tube and the third and fourth ports are for connecting another two pins on an opposite end of the lamp tube; a power supply having a positive terminal and a negative terminal; a switch module comprising first, second and third switches, each of the first and second switches having a static terminal and first, second third and fourth dynamic terminals for selectively connecting with the static terminal thereof, the third switch having a static terminal and at least one dynamic terminal for connecting with the static terminal of the third switch, the static terminals of the first and second switches being respectively connected to the positive and negative terminals of the power supply, the static terminal of the third switch being connected to the second port; a ballast having a first end connected to the second dynamic terminal of the first switch and a second end connected to the first and fourth dynamic terminals of the first switch and the third port; and a starter having a first end connected to the at least one dynamic terminal of the third switch and a second end connected to the fourth port and the first and third dynamic terminals of the of the second switch, the third dynamic terminal of the first switch and the second and fourth dynamic terminals of the second switch connecting with the first port.