LED tube lamp
DCFirst Claim
1. A light-emitting diode (LED) tube lamp, comprising:
- a lamp tube;
a first end cap, having a first external connection terminal and a second external connection terminal and coupled to one end of the lamp tube,a second end cap, having a third external connection terminal and coupled to the other end of the lamp tube, wherein the external connection terminals of the two end caps are for receiving an external driving signal;
a rectifying circuit, coupled to the external connection terminals of the end caps, for rectifying the external driving signal to produce a rectified signal;
a filtering circuit, coupled to the rectifying circuit, for filtering the rectified signal to produce a filtered signal;
an LED module, disposed on a power loop of the LED tube lamp, coupled to the filtering circuit and configured to be driven based on the filtered signal for emitting light; and
an installation detection module, coupled to the power loop and configured to generate a control signal having at least one pulse and to temporarily cause a current to be conducted in a detection path during the pulse-on time of the control signal for detecting an installation state between the LED tube lamp and a lamp socket,wherein the rectifying circuit comprises;
a first bridge arm, coupled to the first external connection terminal on the first end cap;
a second bridge arm, coupled to the second external connection terminal on the first end cap, and connected in parallel with the first bridge arm; and
a third bridge arm, coupled to the third external connection terminal on the second end cap and connected in parallel with the first and the second bridge arms,wherein any two of the bridge arms form a full-wave rectifier.
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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.
49 Citations
22 Claims
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1. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; a first end cap, having a first external connection terminal and a second external connection terminal and coupled to one end of the lamp tube, a second end cap, having a third external connection terminal and coupled to the other end of the lamp tube, wherein the external connection terminals of the two end caps are for receiving an external driving signal; a rectifying circuit, coupled to the external connection terminals of the end caps, for rectifying the external driving signal to produce a rectified signal; a filtering circuit, coupled to the rectifying circuit, for filtering the rectified signal to produce a filtered signal; an LED module, disposed on a power loop of the LED tube lamp, coupled to the filtering circuit and configured to be driven based on the filtered signal for emitting light; and an installation detection module, coupled to the power loop and configured to generate a control signal having at least one pulse and to temporarily cause a current to be conducted in a detection path during the pulse-on time of the control signal for detecting an installation state between the LED tube lamp and a lamp socket, wherein the rectifying circuit comprises; a first bridge arm, coupled to the first external connection terminal on the first end cap; a second bridge arm, coupled to the second external connection terminal on the first end cap, and connected in parallel with the first bridge arm; and a third bridge arm, coupled to the third external connection terminal on the second end cap and connected in parallel with the first and the second bridge arms, wherein any two of the bridge arms form a full-wave rectifier. - View Dependent Claims (2, 3, 4, 5)
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6. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; two end caps, each having at least one external connection terminal, and each coupled to a respective end of the lamp tube, the external connection terminals of the two end caps for receiving an external driving signal; a rectifying circuit, coupled to at least two external connection terminals of the end caps, for rectifying the external driving signal to produce a rectified signal; a filtering circuit, coupled to the rectifying circuit, for filtering the rectified signal to produce a filtered signal; an LED module, disposed in a power loop of the LED tube lamp, coupled to the filtering circuit and configured to be driven based on the filtered signal for emitting light; and an installation detection module, coupled on the power loop and configured to generate a control signal having at least one pulse and to temporarily cause a current to be conducted in a detection path during the pulse-on time of the control signal for detecting an installation state between the LED tube lamp and a lamp socket, wherein the control signal is used for resetting the pulse, and wherein at least a part of electronic components within the installation detection module are integrated as part of an integrated circuit. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An integrated three-terminal switch device configured in a light-emitting diode (LED) tube lamp to detect an installation state between the LED tube lamp and a lamp socket, wherein the integrated three-terminal switch device has a power terminal adapted to receive a driving voltage, a first switching terminal, and a second switching terminal, the first and the second switching terminals are part of a power loop of the LED tube lamp, and the integrated three-terminal switch device comprises:
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a signal processing unit, configured to output a control signal having at least one pulse to an output terminal; a signal generating unit, connected to the signal processing unit and configured to generate a pulse signal and transmit the pulse signal to the signal processing unit; a signal capturing unit, connected to the signal processing unit, and configured to sample an electrical signal passing through the power loop to generate a detection result signal indicating a detection result of the installation state and transmit the detection result signal to the signal processing unit; and a switch unit, disposed on the power loop, connected to the signal processing unit and the signal capturing unit, and configured to be switched according to the control signal, wherein the signal processing unit is configured to output the pulse signal as the control signal during a detection stage, and keep the signal level of the control signal at a high voltage level or a low voltage level according to the detection result signal, and wherein the signal processing unit feeds back the control signal to the signal generating unit as a reference for generating the pulse signal.
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Specification