Method of driving at least one led string thereof

Abstract

The Light Emitting Diode (LED) lamp is adapted for mounting in a fluorescent tube mount having a selectively activatable magnetic ballast powering two pairs of sockets with AC power upon activation. The LED lamp has a body having connectors at both opposite ends adapted to the corresponding pair of sockets, at least one LED string extending along at least a portion of the body, a driver inside the body connecting the connectors to the LED string, the driver including a transistor, an inductor, and a rectifier in a switch mode converter configuration, for converting the AC power of the sockets into a DC power of a voltage adapted to power the LED string; and a pulse mode controller for controlling the transistor in an intermittent manner upon activation of the multiple fluorescent tube mount, until conduction across the at least one LED string is achieved.

1 - 9 . (canceled) 
     
     
         10 . A method of driving at least one LED string, the method comprising providing a progressive voltage increase to the at least one LED string during a period of time of at least 1 ms following activation of the magnetic ballast. 
     
     
         11 . (canceled) 
     
     
         12 . The method of  claim 10  wherein the period of time is of at least 10 ms following activation of the magnetic ballast.