Patent ID: 10390396

Abstract:
A linear light-emitting diode (LED) lamp (LL lamp) comprising a front-end module, an LED driving circuit operable with a ballast and alternate current (AC) mains, an anti-electric-shock module, and a switch control module operates with the AC mains in a single end and double ends and with the ballast in the double ends without any risk of electric shock. Besides, the LL lamp passes an industry required electric shock test when an input AC voltage from a testing ballast is applied in the double ends. Whereas both the front-end module and the switch control module are coupled to a first ground reference, the LED driving circuit is coupled to a second ground reference. When the input AC voltage from the ballast is applied, the switch control module is enabled to couple the second ground reference to the first ground reference, allowing a current returned to operate the LL lamp.