Patent ID: 8610361
Filing Date: 2013-12-17
Classification: F21K,F21V,F21Y,H05B,Y02B

Abstract:
1. A LED tube, comprising: a substantially fluorescent-tube-shaped and fluorescent-tube-sized translucent or fluorescent tube having one or more LED components and a current control unit installed therein, both ends of the LED tube being provided with at least one contact pin for connecting the LED tube mechanically and electrically to tube holders of a fluorescent tube lighting fixture; and a safety unit arranged to switch electric power from the ends of the LED tube to the current control unit and the one or more LED components separately only after a voltage fed from the corresponding tube holder of the lighting fixture to said at least one contact pin has been detected at each end of the LED tube separately, and the supply of electric power or the control of the switching of electric power is cross-connected between the ends of the LED tube, wherein the safety unit comprises: a first and a second controlled switching device at a first and at a second end of the LED tube, respectively, configured to supply electric power to the current control unit and to the one or more LED components; a first voltage detector connected to detect the voltage from said at least one contact pin at the first end of the LED tube, and connected to control said second switching device at the opposite second end of the LED tube; and a second voltage detector connected to detect the voltage from said at least one contact pin at the second end of the LED tube, and connected to control said first switching device at the opposite first end of the LED tube.