LED tube lamp
First Claim
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1. A ballast-bypass light-emitting diode (LED) tube lamp having at least a first and second external connection terminal each connected to an opposite side of the ballast by-pass LED tube lamp, comprising:
- an LED module, configured to emit light in response to a lamp driving signal; and
a power supply module, electrically connected to the first and second external connection terminals for receiving an external driving signal, and configured to supply the lamp driving signal according to the external driving signal, wherein the external driving signal has a frequency substantially equal to 50 Hz or 60 Hz; and
wherein the power supply module has a first current path electrically connected to the LED module so as to form a power loop, and the power supply module comprises;
an electric shock detection circuit, configured to form a second current path for detecting whether an external impedance is electrically connected to the ballast-bypass LED tube lamp,wherein when the external impedance is not connected, the electric shock detection circuit cuts off the second current path.
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Abstract
An LED tube lamp is disclosed. The LED tube lamp is a ballast-bypass LED tube lamp that includes a lamp tube, two end caps, an LED module, and a power supply module including an electric shock detection circuit. The electric shock detection circuit is capable of forming a current path electrically connected to a power loop of the LED tube lamp for detecting whether a human touches the conductive part of the LED tube lamp when one end of the LED tube lamp has been inserted into a lamp socket.
16 Citations
33 Claims
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1. A ballast-bypass light-emitting diode (LED) tube lamp having at least a first and second external connection terminal each connected to an opposite side of the ballast by-pass LED tube lamp, comprising:
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an LED module, configured to emit light in response to a lamp driving signal; and a power supply module, electrically connected to the first and second external connection terminals for receiving an external driving signal, and configured to supply the lamp driving signal according to the external driving signal, wherein the external driving signal has a frequency substantially equal to 50 Hz or 60 Hz; and wherein the power supply module has a first current path electrically connected to the LED module so as to form a power loop, and the power supply module comprises; an electric shock detection circuit, configured to form a second current path for detecting whether an external impedance is electrically connected to the ballast-bypass LED tube lamp, wherein when the external impedance is not connected, the electric shock detection circuit cuts off the second current path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A ballast-bypass light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; two end caps, respectively disposed on opposite sides of the lamp tube, wherein each end cap has an external connection terminal for receiving an external driving signal having a frequency substantially equal to 50 Hz or 60 Hz; an LED module, configured to emit light in response to a lamp driving signal; and a power supply module, electrically connected to the external connection terminals and the LED module, wherein the power supply module comprises; a rectifying circuit, having an input side electrically connected to the external connection terminals, and configured to generate a rectified signal as a basis of generating the lamp driving signal; and an electric shock detection circuit, configured to form a detection current path between the input side of the rectifying circuit and a ground terminal, for detecting whether an external impedance is electrically connected to the ballast-bypass LED tube lamp. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A ballast-bypass light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; two end caps, respectively disposed on opposite sides of the lamp tube, wherein each end cap has an external connection terminal for receiving an external driving signal having a frequency substantially equal to 50 Hz or 60 Hz; a rectifying circuit, electrically connected to the external connection terminals for receiving the external driving signal, and configured to generate a rectified signal based on the external driving signal; a filtering circuit, electrically connected to the rectifying circuit for receiving the rectified signal, and configured to generate a filtered signal based on the rectified signal; a driving circuit, electrically connected to the filtering circuit for receiving the filtered signal, and configured to convert the filtered signal into a lamp driving signal; an LED module, electrically connected to the driving circuit for receiving the lamp driving signal, wherein a power loop is formed by a current path passing through the rectifying circuit, the filtering circuit, the driving circuit and the LED module; and an electric shock detection circuit, configured to detect whether an external impedance is electrically connected to the ballast-bypass LED tube lamp, wherein when the external impedance is detected, the electric shock detection circuit disables the driving circuit from converting the filtered signal, so as to limit a current from conducting on the power loop. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification