Dual-Mode LED tube lamp
First Claim
1. A light-emitting diode (LED) tube lamp having different modes for operating under different types of power sources, comprising:
- a lamp tube;
a rectifying circuit, configured to receive and rectify an external driving signal to produce a rectified signal;
a filtering circuit, coupled to the rectifying circuit, and configured to filter the rectified signal to produce a filtered signal, wherein the filtering circuit has at least one filtering output terminal;
a driving circuit, configured to produce a driving signal based on the filtered signal, wherein the driving circuit has at least one driving input terminal and at least one driving output terminal;
a mode switching circuit, coupled to the filtering circuit and the driving circuit, and configured to determine whether to provide a bypass signal path that allows the filtered signal to bypass at least one electronic component of the driving circuit; and
an LED module, coupled to the driving output terminal of the driving circuit and the mode switching circuit, and configured to emit light based on the signal received from one of the driving circuit and the bypass signal path,wherein the mode switching circuit comprises;
a mode switching switch, having a first terminal coupled to the filtering output terminal, a second terminal coupled to the driving input terminal, and a third terminal coupled to the driving output terminal,wherein a signal path through the first and the second terminals forms a driving signal path, and a signal path through the first and the third terminals forms the bypass signal path, andwherein the mode switching switch is configured to switch between conducting a current to the driving signal path and conducting a current to the bypass signal path.
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Accused Products
Abstract
The LED tube lamp includes a lamp tube configured to receive an external driving signal; a rectifying circuit configured to rectify the external driving signal to produce a rectified signal; a filtering circuit coupled to the rectifying circuit, and configured to filter the rectified signal to produce a filtered signal, wherein the filtering circuit has a first filtering output terminal and a second filtering output terminal; an LED lighting module coupled to the filtering circuit, wherein the LED lighting module includes a driving circuit having a first driving output terminal and a second driving output terminal and configured to receive the filtered signal to produce a driving signal, and an LED module configured to receive the driving signal and emit light; and a mode switching circuit coupled to at least one of the first and the second filtering output terminal and at least one of the first and the second driving output terminal, and configured to determine to perform one of a first driving mode and a second driving mode.
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Citations
23 Claims
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1. A light-emitting diode (LED) tube lamp having different modes for operating under different types of power sources, comprising:
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a lamp tube; a rectifying circuit, configured to receive and rectify an external driving signal to produce a rectified signal; a filtering circuit, coupled to the rectifying circuit, and configured to filter the rectified signal to produce a filtered signal, wherein the filtering circuit has at least one filtering output terminal; a driving circuit, configured to produce a driving signal based on the filtered signal, wherein the driving circuit has at least one driving input terminal and at least one driving output terminal; a mode switching circuit, coupled to the filtering circuit and the driving circuit, and configured to determine whether to provide a bypass signal path that allows the filtered signal to bypass at least one electronic component of the driving circuit; and an LED module, coupled to the driving output terminal of the driving circuit and the mode switching circuit, and configured to emit light based on the signal received from one of the driving circuit and the bypass signal path, wherein the mode switching circuit comprises; a mode switching switch, having a first terminal coupled to the filtering output terminal, a second terminal coupled to the driving input terminal, and a third terminal coupled to the driving output terminal, wherein a signal path through the first and the second terminals forms a driving signal path, and a signal path through the first and the third terminals forms the bypass signal path, and wherein the mode switching switch is configured to switch between conducting a current to the driving signal path and conducting a current to the bypass signal path. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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7. A light-emitting diode (LED) tube lamp having different modes for operating under different types of power sources, comprising:
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a lamp tube; a rectifying circuit, configured to receive and rectify an external driving signal to produce a rectified signal; a filtering circuit, coupled to the rectifying circuit, and configured to filter the rectified signal to produce a filtered signal; a driving circuit, configured to produce a driving signal based on the filtered signal; a mode switching circuit, coupled to the filtering circuit and the driving circuit, and configured to determine whether to provide a bypass signal path that allows the filtered signal to bypass at least one electronic component of the driving circuit; and an LED module, coupled to the driving circuit and the mode switching circuit, and configured to emit light based on the signal received from one of the driving circuit and the bypass signal path, wherein the mode switching circuit is configured to be manually switched by a user for controlling the mode switching circuit to switch between cutting off the bypass signal path and conducting a current to the bypass signal path.
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18. A light-emitting diode (LED) tube lamp having different modes for operating under different types of power sources, comprising:
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a lamp tube; a rectifying circuit, configured to receive and rectify an external driving signal to produce a rectified signal; a filtering circuit, coupled to the rectifying circuit, and configured to filter the rectified signal to produce a filtered signal, wherein the filtering circuit has at least one filtering output terminal; a driving circuit, configured to produce a driving signal based on the filtered signal, wherein the driving circuit has at least one driving input terminal coupled to the filtering output terminal and at least one driving output terminal; and an LED module, configured to emit light based on a signal received from one of the driving circuit and a bypass signal path, wherein the LED module has at least one LED input terminal, wherein the mode switching circuit comprises; a mode switching switch, having a first terminal coupled to the LED input terminal of the LED module, a second terminal coupled to the driving output terminal, and a third terminal coupled to the filtering output terminal, wherein a signal path through the first and the second terminals forms a driving signal path, and a signal path through the first and the third terminals forms the bypass signal path, and wherein the mode switching switch is configured to switch between selecting one of the driving signal path and the bypass signal path. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification