• US 20180368233A1
  • Filed: 08/13/2018
  • Published: 12/20/2018
  • Est. Priority Date: 04/14/2015
  • Status: Active Grant
First Claim
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1. A light emitting diode (LED) tube lamp, comprising:

  • a lamp tube;

    two external connection terminals coupled to the lamp tube;

    a first rectifying circuit comprising diodes and connected to the two external connection terminals, wherein the two external connection terminals are for receiving an external driving signal and the first rectifying circuit is for rectifying the input external driving signal to produce a rectified signal;

    an LED module comprising LEDs for emitting light, the LED module configured to be driven based on the rectified signal;

    a driving circuit coupled between the first rectifying circuit and the LED module, and configured to drive the LED module; and

    a delay-control circuit coupled to the first rectifying circuit and comprising a control circuit and a switch, wherein the delay-control circuit is configured to receive the rectified signal and the control circuit is configured to control current conduction or cutoff of the switch depending on a driving signal derived from the rectified signal and received by the control circuit, andwherein when the external driving signal is a low frequency signal, the delay-control circuit is configured to cause the rectified signal to be used by the driving circuit for driving the LED module to emit light, depending on a property of the rectified signal.

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