LED TUBE LAMP
First Claim
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.
1 Assignment
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Accused Products
Abstract
An LED tube lamp is disclosed. An installation detection circuit is configured in the LED tube lamp configured to receive an external driving signal. The installation detection circuit is configured to detect during one or more pulse signals whether the LED tube lamp is properly installed on a lamp socket, based on detecting a signal generated from the external driving signal. The installation detection circuit includes a switch circuit coupled to the pulse generating circuit, wherein the one or more pulse signals control turning on and off of the switch circuit. The installation detection circuit is further configured to: when it is detected during one or more pulse signals that the LED tube lamp is not properly installed on the lamp socket, control the switch circuit to remain in an off state to cause a power loop of the LED tube lamp to be open; and when it is detected during one or more pulse signals that the LED tube lamp is properly installed on the lamp socket, control the switch circuit to remain in a conducting state to cause the power loop of the LED tube lamp to maintain a conducting state.
205 Citations
45 Claims
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1. A ballast bypass LED tube lamp adapted to install on a lamp socket, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A power supply module for a dual-ended ballast bypass LED tube lamp, comprising:
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a rectifying circuit, configured to receive an AC signal without the AC signal passing through a ballast, and to rectify the AC signal to produce a rectified signal; a filtering circuit, coupled to the rectifying circuit and configured to filter the rectified signal to produce a filtered signal; a driving circuit, coupled to the filtering circuit and configured to perform power conversion on the filtered signal and produce a driving signal; and an installation detection module, configured to determine whether to limit a current on a current path of the power supply module 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 whether a risk of electric shock exists and generates the installation detection result. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 43)
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42. A power supply method for an LED tube lamp, comprising:
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receiving an AC signal, without the AC signal passing through a ballast, from respective ends of the LED tube lamp; rectifying and filtering the AC signal to produce a filtered signal; converting the filtered signal into a driving signal by a power conversion means; providing the driving signal to an LED module of the LED tube lamp for emitting light; detecting a signal feature on a detection path on the LED tube lamp and generating an installation detection result; and limiting a current on a current path of the LED tube lamp when the installation detection result indicates a risk of electric shock exists. - View Dependent Claims (44, 45)
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Specification