LED tube lamp
DC CAFCFirst Claim
1. An installation detection circuit configured in a light-emitting diode (LED) tube lamp configured to receive an external driving signal, the installation detection circuit comprising:
- a pulse generating circuit configured to output one or more pulse signals;
wherein the installation detection circuit is configured to detect during at least one of the 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; and
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;
wherein the installation detection circuit is further configured to;
when it is detected during one of the 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 of the 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,wherein the signal generated from the external driving signal is a sampling signal on the power loop, the installation detection circuit further comprises a detection determining circuit configured to detect the sampling signal for determining whether the LED tube lamp is properly installed on the lamp socket, and the power loop includes the switch circuit and the detection determining circuit, andwherein the pulse generating circuit is configured to output one or more pulse signals independent of whether the detection determining circuit detects the sampling signal.
1 Assignment
Litigations
1 Petition
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 includes: a pulse generating circuit configured to output one or more pulse signals; wherein 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; and 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.
51 Citations
35 Claims
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1. An installation detection circuit configured in a light-emitting diode (LED) tube lamp configured to receive an external driving signal, the installation detection circuit comprising:
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a pulse generating circuit configured to output one or more pulse signals;
wherein the installation detection circuit is configured to detect during at least one of the 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; anda switch circuit coupled to the pulse generating circuit, wherein the one or more pulse signals control turning on and off of the switch circuit; wherein the installation detection circuit is further configured to; when it is detected during one of the 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 of the 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, wherein the signal generated from the external driving signal is a sampling signal on the power loop, the installation detection circuit further comprises a detection determining circuit configured to detect the sampling signal for determining whether the LED tube lamp is properly installed on the lamp socket, and the power loop includes the switch circuit and the detection determining circuit, and wherein the pulse generating circuit is configured to output one or more pulse signals independent of whether the detection determining circuit detects the sampling signal. - View Dependent Claims (2, 3, 20, 31, 32, 33, 34, 35)
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4. An installation detection circuit configured in a light-emitting diode (LED) tube lamp configured to receive an external driving signal, the installation detection circuit comprising:
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a pulse generating circuit configured to output one or more pulse signals;
wherein the installation detection circuit is configured to detect during at least one of the 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; anda switch circuit coupled to the pulse generating circuit, wherein the one or more pulse signals control turning on and off of the switch circuit; wherein the installation detection circuit is further configured to; when it is detected during one of the 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 of the 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, and wherein the signal generated from the external driving signal is a sampling signal on the power loop, the installation detection circuit further comprises a detection determining circuit configured to detect the sampling signal for determining whether the LED tube lamp is properly installed on the lamp socket, and the power loop includes the switch circuit and the detection determining circuit; and wherein the installation detection circuit further includes a detection result latching circuit coupled to the switch circuit, wherein the detection result latching circuit is configured to receive the one or more pulse signals to control turning on and off of the switch circuit based on a detection result signal from the detection determining circuit. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 30)
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17. An installation detection circuit configured in a light-emitting diode (LED) tube lamp configured to receive an external driving signal, the installation detection circuit comprising:
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a pulse generating circuit configured to output one or more pulse signals;
wherein the installation detection circuit is configured to detect during at least one of the 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; anda switch circuit coupled to the pulse generating circuit, wherein the one or more pulse signals control turning on and off of the switch circuit; wherein the installation detection circuit is further configured to; when it is detected during one of the 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 of the 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, and wherein the LED tube lamp comprises a lamp tube and a circuit board, and comprises an inductive element connected between two terminals respectively at two ends of the lamp tube for grounding or connecting to a reference potential, wherein one of the two terminals is connected to the circuit board. - View Dependent Claims (18, 19)
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21. An installation detection circuit configured in a light-emitting diode (LED) tube lamp, the installation detection circuit comprising:
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means for generating one or more pulse signals; means for detecting during one or more pulse signals whether the LED tube lamp is properly installed on a lamp socket; and a switch circuit coupled to the means for generating one or more pulse signals, wherein the one or more pulse signals control turning on and off of the switch circuit; wherein the installation detection circuit is further configured to; when it is detected during one of the 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 of the 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, wherein the means for detecting is configured to detect a sampling signal on the power loop for determining whether the LED tube lamp is properly installed on the lamp socket, and the power loop includes the switch circuit and the means for detecting, and wherein the LED tube lamp is configured to receive an external driving signal and comprises a rectifying circuit for rectifying the external driving signal and a filtering circuit coupled to the rectifying circuit, wherein the installation detection circuit is coupled between the rectifying circuit and the filtering circuit. - View Dependent Claims (22, 23)
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24. A detection method adopted by a light-emitting device (LED) tube lamp for preventing a user from electric shock when the LED tube lamp is being installed on a lamp socket, the detection method comprising:
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when at least one end of the LED tube lamp is installed on the lamp socket, generating one or more pulse signals by a pulse generating circuit, wherein the pulse generating circuit is configured in the LED tube lamp; detecting a sampling signal on a power loop of the LED tube lamp by a detection determining circuit, to detect during the one or more pulse signals whether the other end of the LED tube lamp is properly installed on the lamp socket; receiving the one or more pulse signals through a detection result latching circuit by a switch circuit, wherein the switch circuit is on the power loop; and comparing the sampling signal with a predefined signal, wherein during the one or more pulse signals when the sampling signal is smaller than the predefined signal, the detection method further comprises; controlling the switch circuit to remain in an off state to cause the power loop of the LED tube lamp to be open. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification