Patent ID: 8531109

Claim:
LED tube system for driving at least one LED assembly ( 14 , 200 ), the LED tube system comprising: an LED tube housing ( 1 ) for containing the at least one LED assembly ( 14 , 200 ); a first pair of mains input terminals (A, B) provided at a first end of the LED tube housing ( 1 ) and a second pair of mains input terminals (C, D) provided at a second, opposing, end of the LED tube housing ( 1 ) for receiving a mains supply voltage (V mns ) between a respective one of the first pair of mains input terminals (A, B) and a respective one of the second pair of mains input terminals (C, D) and for supplying the mains supply voltage (V mns ) to an internal part of the LED tube system for driving the at least one LED assembly ( 14 , 200 ), and a switching circuit ( 100 ) being electrically connected with all mains input terminals (A, B, C, D) and being arranged for: i) electrically connecting the first pair of mains input terminals (A, B) in a first state (2/ON) of the switching circuit ( 100 ) and electrically separating the first pair of mains input terminals (A, B) in a second state (1/OFF) of the switching circuit ( 100 ); ii) electrically connecting the second pair of mains input terminals (C, D) in the first state (2/ON) of the switching circuit ( 100 ) and electrically separating the second pair of mains input terminals (C, D) in the second state (1/OFF) of the switching circuit ( 100 ); iii) electrically connecting a coupling capacitor (C 10 , C 11 ) between a respective one of the first pair of mains input terminals (A, B) and a respective one of the second pair of mains input terminals (C, D) in the first state (2/ON) of the switching circuit ( 100 ) and electrically separating the respective one of the first pair of mains input terminals (A, B) and the respective one of the second pair of mains input terminals (C, D) in the second state (1/OFF) of the switching circuit ( 100 ).