LED tube lamp compatible with different sources of external driving signal
First Claim
1. A light-emitting diode (LED) tube lamp, comprising:
- a lamp tube;
at least two external connection terminals for the lamp tube, for receiving an external driving signal;
a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising an LED module, for emitting light; and
a ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light;
the ballast interface circuit further comprises an electronic switch coupled to the detection circuit, and the detection circuit comprises a voltage detection circuit coupled to the electronic switch; and
the voltage detection circuit is configured to determine whether the external driving signal is a high frequency or high voltage signal according to the voltage level of the rectified signal, in order to control current conduction or cutoff of the electronic switch, wherein the current conduction causes current conduction in the LED module and the cutoff causes an open circuit for the LED module.
1 Assignment
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Accused Products
Abstract
An LED tube lamp is provided. The LED tube lamp includes a lamp tube having at least two external connection terminals, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; an LED lighting module comprising an LED module, for emitting light; and a ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light.
92 Citations
42 Claims
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1. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; an LED lighting module comprising an LED module, for emitting light; and a ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light;
the ballast interface circuit further comprises an electronic switch coupled to the detection circuit, and the detection circuit comprises a voltage detection circuit coupled to the electronic switch; and
the voltage detection circuit is configured to determine whether the external driving signal is a high frequency or high voltage signal according to the voltage level of the rectified signal, in order to control current conduction or cutoff of the electronic switch, wherein the current conduction causes current conduction in the LED module and the cutoff causes an open circuit for the LED module. - View Dependent Claims (36)
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2. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising an LED module, for emitting light; anda ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light; wherein the ballast interface circuit further comprises an electronic switch coupled to the detection circuit, and the detection circuit comprises a frequency determination circuit coupled to the electronic switch; and wherein the frequency determination circuit is configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency of the rectified signal, in order to control current conduction or cutoff of the electronic switch, wherein the current conduction causes current conduction in the LED module and the cutoff causes an open circuit for the LED module.
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3. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising an LED module, for emitting light; anda ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light; wherein the ballast interface circuit further comprises a circuit branch coupled to the detection circuit, and the detection circuit comprises a control circuit and an electronic switch; and wherein the circuit branch is configured to detect the voltage level of the rectified signal and then generate a detection signal; and
the control circuit is configured to determine whether the external driving signal is a high frequency or high voltage signal according to the detection signal, and to control current conduction or cutoff of the electronic switch, wherein the current conduction causes current conduction in the LED module and the cutoff causes an open circuit for the LED module.
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4. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; an LED lighting module comprising an LED module, for emitting light; and a ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light; wherein the detection circuit comprises a thyristor, which is configured to conduct current or be cutoff depending on the voltage level of the rectified signal; and wherein when the external driving signal is a high frequency or high voltage signal, the thyristor conducts current after a predefined delay of time upon the external driving signal being input to the LED tube lamp. - View Dependent Claims (34, 37, 39)
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5. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising an LED module, for emitting light; anda ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light; wherein the detection circuit determines that the external driving signal is a high frequency or high voltage signal when determining that the voltage level of the rectified signal is higher than a predefined first threshold level; wherein the ballast interface circuit causes an open circuit for the LED module when the detection circuit determines that the voltage level of the rectified signal is higher than a predefined second threshold level but lower than the predefined first threshold level, wherein the predefined first threshold level is higher than the predefined second threshold level; and wherein the ballast interface circuit causes current conduction in the LED module when the detection circuit determines that the voltage level of the rectified signal is lower than the predefined second threshold level. - View Dependent Claims (15)
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6. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; an LED lighting module comprising an LED module, for emitting light; and a ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light; wherein the detection circuit comprises a thyristor device coupled between the rectifying circuit and the LED module; and wherein when the external driving signal is determined to be a high frequency or high voltage signal, the thyristor device is configured to conduct current after a predefined delay of time upon the external driving signal being input to the LED tube lamp. - View Dependent Claims (14, 16, 17, 18, 19, 38, 40)
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7. A light-emitting diode (LED) tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising an LED module, for emitting light;a ballast interface circuit coupled between the external connection terminals and the LED lighting module, and comprising a detection circuit configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the ballast interface circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the ballast interface circuit causes current conduction in the LED module for emitting light; a filtering circuit; and an over voltage protection circuit, wherein the filtering circuit is coupled to the rectifying circuit to filter the rectified signal to produce a filtered signal, and two output terminals of the filtering circuit are respectively coupled to an anode and a cathode of the LED module; and
wherein the over voltage protection circuit comprises a resistor and a switch connected in series between the two output terminals of the filtering circuit, wherein the switch is configured to conduct current or be cutoff according to a voltage level of the filtered signal.
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8. An LED tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; an LED lighting module comprising an LED module, for emitting light; and a ballast detection circuit coupled to the rectifying circuit and comprising a detection circuit configured to determine whether the external driving signal is a high frequency signal according to the frequency of the external driving signal, wherein the ballast detection circuit is configured such that when the external driving signal is determined to be a high frequency signal, the ballast detection circuit allows transmission of the external driving signal to the LED lighting module through the detection circuit or a circuit external to the ballast detection circuit; and
when the external driving signal is determined to be a low frequency signal the ballast detection circuit allows transmission of the external driving signal to the LED lighting module by bypassing the detection circuit;
the ballast detection circuit further comprises a switch circuit connected to the detection circuit and controlled by the detection circuit; and
wherein, when the external driving signal is determined to be a high frequency signal, the switch circuit is configured to be cutoff to allow transmission of the external driving signal through a circuit connected in parallel with the switch circuit, or through the external circuit; and
when the external driving signal is determined to be a low frequency signal, the switch circuit is configured to conduct current for transmission of the external driving signal bypassing the circuit connected in parallel with the switch circuit. - View Dependent Claims (22, 23, 24, 32, 41)
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9. An LED tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising an LED module, for emitting light; anda ballast detection circuit coupled to the rectifying circuit and comprising a detection circuit configured to determine whether the external driving signal is a high frequency signal according to the frequency of the external driving signal, wherein the ballast detection circuit is configured such that when the external driving signal is determined to be a high frequency signal, the ballast detection circuit allows transmission of the external driving signal to the LED lighting module through the detection circuit or a circuit external to the ballast detection circuit; and
when the external driving signal is determined to be a low frequency signal the ballast detection circuit allows transmission of the external driving signal to the LED lighting module by bypassing the detection circuit or the external circuit;wherein the LED lighting module further comprises a driving circuit for driving the LED module, the ballast detection circuit further comprises a mode switching circuit, and the detection circuit is configured to produce a control signal, according to the frequency of the external driving signal, to control the mode switching circuit on whether to perform a first mode or a second mode of lighting operation;
when the mode switching circuit performs the first mode of lighting operation, the driving circuit receives the rectified signal and drives the LED module; and
when the mode switching circuit performs the second mode of lighting operation, transmission of the rectified signal bypasses at least some components of the driving circuit in order to drive the LED module. - View Dependent Claims (28, 29, 30, 31)
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10. An LED tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal; an LED lighting module comprising an LED module, for emitting light; and a ballast detection circuit coupled to the rectifying circuit and comprising a detection circuit configured to determine whether the external driving signal is a high frequency signal according to the frequency of the external driving signal, wherein the ballast detection circuit is configured such that when the external driving signal is determined to be in a first frequency range, the ballast detection circuit allows transmission of the external driving signal to the LED lighting module through the detection circuit or a circuit external to the ballast detection circuit; and
when the external driving signal is determined to be in a second frequency range the ballast detection circuit allows transmission of the external driving signal to the LED lighting module by bypassing the detection circuit or the external circuit;wherein the detection circuit comprises a frequency determination circuit, the ballast detection circuit further comprises a switch circuit connected to the detection circuit, and the frequency determination circuit is configured to control current conduction or cutoff of the switch circuit according to the frequency of the external driving signal; and
when the external driving signal is determined to be in a first frequency range, the switch circuit is cutoff, and when the external driving signal is determined to be in a second frequency range, the switch circuit conducts current. - View Dependent Claims (20, 21, 33, 35, 42)
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11. An LED tube lamp, comprising:
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a lamp tube; at least two external connection terminals for the lamp tube, for receiving an external driving signal; a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising an LED module, for emitting light;a ballast detection circuit coupled to the rectifying circuit and comprising a detection circuit configured to determine whether the external driving signal is a high frequency signal according to the frequency of the external driving signal, wherein the ballast detection circuit is configured such that when the external driving signal is determined to be a high frequency signal, the ballast detection circuit allows transmission of the external driving signal to the LED lighting module through the detection circuit or a circuit external to the ballast detection circuit; and
when the external driving signal is determined to be a low frequency signal the ballast detection circuit allows transmission of the external driving signal to the LED lighting module by bypassing the detection circuit or the external circuit; anda light strip and a circuit board, wherein the light strip is disposed in the lamp tube, the circuit board is contained in an end cap at an end of the lamp tube, and the light strip or the circuit board includes two soldering points;
a chip capacitor of the LED tube lamp is disposed on the light strip or the circuit board and is connected to the two soldering points; and
a hole or groove is disposed below the chip capacitor, between the two soldering points, and in the light strip or the circuit board.
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12. An LED tube lamp, comprising:
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a lamp tube; at least two external connection terminals, for receiving an external driving signal from outside the LED tube lamp; a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising a driving circuit and an LED module for emitting light, the driving circuit for driving the LED module;a mode determination circuit coupled to the driving circuit and configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the mode determination circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the mode determination circuit allows transmission of the rectified signal to the LED module by bypassing at least some components of the driving circuit; and
when the external driving signal is determined to be a low frequency or low voltage signal, the mode determination circuit allows the driving circuit to receive the rectified signal and drive the LED module; anda mode switching circuit coupled to the mode determination circuit and the driving circuit, and the mode determination circuit comprises a voltage determination circuit configured to control, according to the voltage level of the external driving signal, the mode switching circuit on whether to perform a first mode of lighting operation or a second mode of lighting operation; wherein, when the mode switching circuit performs the first mode of lighting operation, the driving circuit receives the rectified signal and drives the LED module; and when the mode switching circuit performs the second mode of lighting operation, transmission of the rectified signal bypasses at least some components of the driving circuit in order to drive the LED module; and wherein the voltage determination circuit comprises a symmetrical trigger diode coupled to a resistor, and the symmetrical trigger diode is configured to receive the rectified signal to generate a determination result signal at a connection node between the symmetrical trigger diode and the resistor. - View Dependent Claims (25, 26, 27)
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13. An LED tube lamp, comprising:
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a lamp tube; at least two external connection terminals, for receiving an external driving signal from outside the LED tube lamp; a rectifying circuit for rectifying the external driving signal to produce a rectified signal;
an LED lighting module comprising a driving circuit and an LED module for emitting light, the driving circuit for driving the LED module;a mode determination circuit coupled to the driving circuit and configured to determine whether the external driving signal is a high frequency or high voltage signal according to the frequency or voltage level of the rectified signal, wherein the mode determination circuit is configured such that when the external driving signal is determined to be a high frequency or high voltage signal, the mode determination circuit allows transmission of the rectified signal to the LED module by bypassing at least some components of the driving circuit; and
when the external driving signal is determined to be a low frequency or low voltage signal, the mode determination circuit allows the driving circuit to receive the rectified signal and drive the LED module; anda light strip and a circuit board, wherein the light strip is disposed in the lamp tube, the circuit board is contained in an end cap at an end of the lamp tube, and the light strip or the circuit board includes two soldering points;
a chip capacitor of the LED tube lamp is disposed on the light strip or the circuit board and is connected to the two soldering points; and
a hole or groove is disposed below the chip capacitor, between the two soldering points, and in the light strip or the circuit board.
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Specification