LED tube lamp
First Claim
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1. A light emitting diode (LED) tube lamp, comprising:
- a lamp tube, having a first pin and a second pin at a first end of the lamp tube and a third pin at a second end of the lamp tube, for receiving an external driving signal;
a rectifying circuit for rectifying the external driving signal to produce a rectified signal, the rectifying circuit comprising a first rectifying circuit coupled to the first and second pins, wherein the first rectifying circuit comprises diodes;
the rectifying circuit comprising a second rectifying circuit coupled to the third pin, wherein the second rectifying circuit comprises two diodes, and a common node between the two diodes of the second rectifying circuit connects an anode and a cathode respectively of the two diodes of the second rectifying circuit;
an EMI reducing element coupled between the common node between the two diodes of the second rectifying circuit, and the third pin; and
a filtering circuit coupled to the rectifying circuit, for filtering the rectified signal to produce a filtered signal for driving an LED module to emit light, the filtering circuit comprising a capacitor connected in parallel with an LED unit included in the LED module,wherein the LED module is configured to receive the filtered signal for emitting light, and the filtering circuit is coupled between an anode of one of the two diodes of the second rectifying circuit, and a cathode of the other diode of the two diodes of the second rectifying circuit.
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Abstract
An LED tube lamp includes a lamp tube, an LED module, a power supply module, a micro switch, and an actuator. The lamp tube has pins for receiving an external driving signal. The power supply module is configured for supplying power to the LED module. The micro switch is coupled to the power supply module. And the actuator is configured to cause the micro switch to change to a closed-circuit position to allow the power supply module to supply power to the LED module for emitting light. When the LED tube lamp is properly installed into a lamp holder, the micro switch closes to electrically connect the power supply module to an external driving signal.
84 Citations
12 Claims
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1. A light emitting diode (LED) tube lamp, comprising:
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a lamp tube, having a first pin and a second pin at a first end of the lamp tube and a third pin at a second end of the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal, the rectifying circuit comprising a first rectifying circuit coupled to the first and second pins, wherein the first rectifying circuit comprises diodes;
the rectifying circuit comprising a second rectifying circuit coupled to the third pin, wherein the second rectifying circuit comprises two diodes, and a common node between the two diodes of the second rectifying circuit connects an anode and a cathode respectively of the two diodes of the second rectifying circuit;an EMI reducing element coupled between the common node between the two diodes of the second rectifying circuit, and the third pin; and a filtering circuit coupled to the rectifying circuit, for filtering the rectified signal to produce a filtered signal for driving an LED module to emit light, the filtering circuit comprising a capacitor connected in parallel with an LED unit included in the LED module, wherein the LED module is configured to receive the filtered signal for emitting light, and the filtering circuit is coupled between an anode of one of the two diodes of the second rectifying circuit, and a cathode of the other diode of the two diodes of the second rectifying circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification