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LED tube lamp

  • US 10,612,731 B2
  • Filed: 05/03/2019
  • Issued: 04/07/2020
  • Est. Priority Date: 09/28/2014
  • Status: Active Grant
First Claim
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1. A driving method for driving a light-emitting diode (LED) tube lamp having at least a first and second external connection terminal, comprising:

  • receiving an external driving signal from the first and second external connection terminals;

    controlling a first current path to detect whether an external impedance is electrically connected to the LED tube lamp; and

    while the external driving signal is being received and when an external impedance is not electrically connected to the LED tube lamp, the driving method further comprises;

    transmitting current to drive an LED module of the LED tube lamp to emit light via a second current path, wherein the second current path is electrically connected to the LED module to form a power loop; and

    cutting off the first current path.

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