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LED TUBE LAMP

  • US 20170290119A1
  • Filed: 06/19/2017
  • Published: 10/05/2017
  • Est. Priority Date: 03/10/2015
  • Status: Active Grant
First Claim
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1. A ballast bypass LED tube lamp adapted to install on a lamp socket, comprising:

  • a lamp tube;

    two end caps, each having a first external connection terminal, and each coupled to a respective end of the lamp tube, the first connection terminals of the two end caps for receiving an AC signal without the AC signal passing through a ballast on the lamp socket;

    an LED module, disposed in a power loop formed between the first external connection terminals and configured to be driven based on a driving signal for emitting light; and

    a power supply module, coupled to the first external connection terminals and the LED module and configured to drive the LED module by converting a received signal into the driving signal, wherein the power supply module comprises;

    a rectifying circuit, coupled to the first external connection terminals of the end caps, for rectifying the received signal to produce a rectified signal;

    a filtering circuit, coupled to the rectifying circuit, for filtering the rectified signal to produce a filtered signal;

    a driving circuit, coupled to the filtering circuit, for performing power conversion to the filtered signal and producing the driving signal; and

    an installation detection module, configured to determine whether to limit a current on the power loop to less than a predefined value according to an installation detection result,wherein the installation detection module causes a current to be conducted in a detection path for detecting an installation state between the LED tube lamp and the lamp socket and generating the installation detection result.

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