LED tube lamp
An LED tube lamp comprises a glass tube, two end caps coupled to a respective end of the glass tube, an LED light strip attached to an inner circumferential surface of the glass tube, a protective layer disposed on a surface of the LED light strip, a plurality of LED light sources mounted on the LED light strip, two first soldering pads arranged at an end of the LED light strip, two notches formed at an edge of the end of the LED light strip, a power supply module configured to drive the plurality of LED light sources. The protective layer comprises two openings to expose the two first soldering pads. The power supply module comprises a printed circuit board comprising two second soldering pads and each of the two first soldering pad soldered to the respective second soldering pad by a solder. The solder is disposed on the first soldering pad, the corresponding second soldering pad and in the corresponding notch. The power supply module comprises a rectifying circuit and a filtering circuit coupled to the rectifying circuit.
1. An LED tube lamp, comprising:
a glass tube;
two end caps, each of the two end caps coupled to a respective end of the glass tube;
an LED light strip attached to an inner circumferential surface of the glass tube;
a plurality of LED light sources mounted on the LED light strip;
at least two first soldering pads arranged at an end of the LED light strip;
at least two notches are formed at an edge of the end of the LED light strip, each of the notches is further formed at one of the first soldering pads;
a protective layer disposed on a surface of the LED light strip, the protective layer comprising at least two first openings to expose the two first soldering pads; and
a power supply module comprising a printed circuit board and configured to drive the plurality of LED light sources, the printed circuit board comprising at least two second soldering pads, one of the two first soldering pads soldered to one of the respective second soldering pads by a solder,
wherein the power supply module at least comprises a rectifying circuit and a filtering circuit coupled to the rectifying circuit, and the solder is disposed on one of the two first soldering pads, one of the respective second soldering pads and in one of the respective notches.
2. The LED tube lamp as claimed in claim 1 , wherein the protective layer further comprises a plurality of second openings thereon for disposing the plurality of LED light sources.
3. The LED tube lamp as claimed in claim 2 , wherein the protective layer further comprises a third opening adjacent to the two first openings.
4. The LED tube lamp as claimed in claim 2 , wherein the LED light strip comprises a recognizing mark arranged adjacent to the two first openings.
5. The LED tube lamp as claimed in claim 2 , wherein the glass tube comprises a diffusing layer coated on the inner circumferential surface of the glass tube.
6. The LED tube lamp as claimed in claim 5 , wherein the end of the LED light strip is detached from the inner circumferential surface of the glass tube and soldered on the printed circuit board.
7. The LED tube lamp as claimed in claim 6 , wherein the filtering circuit comprises:
a first capacitor, having an end coupled to a first output terminal of the rectifying circuit, and the other end coupled to a second output terminal of the rectifying circuit.
8. The LED tube lamp as claimed in claim 7 , wherein the filtering circuit further comprises:
an EMI-reducing capacitor, coupled between input terminals of the rectifying circuit.
9. The LED tube lamp as claimed in claim 7 , wherein the filtering circuit further comprises:
a first resistor, having an end coupled to a pin on one of the end caps; and
a second capacitor, having an end coupled to the other end of the first resistor, and the other end coupled to one of the input terminals of the rectifying circuit.
10. The LED tube lamp as claimed in claim 9 , wherein the filtering circuit further comprises:
a passive component, coupled to the second capacitor in parallel.
11. The LED tube lamp as claimed in claim 10 , wherein the passive component is an inductor.
12. The LED tube lamp as claimed in claim 7 , wherein the rectifying circuit comprises:
a first diode, having an anode connected to the second output terminal, and a cathode connected to a pin on one of the end caps;
a second diode, having an anode connected to the second output terminal, and a cathode connected to a pin on the other one of the end caps;
a third diode, having an anode connected to the pin on the one of the end caps, and a cathode connected to the first output terminal; and
a fourth diode, having an anode connected to the pin on the other one of the end caps, and a cathode connected to the first output terminal.
13. The LED tube lamp as claimed in claim 12 , wherein the rectifying circuit further comprises:
a terminal adapter circuit, coupled to the cathode of the first diode, the anode of the second diode and the pins on both of the end caps, and configured to transmit signal received from at least one of the pins to the cathode of the first diode and the anode of the second diode.
14. The LED tube lamp as claimed in claim 13 , wherein the terminal adapter circuit comprises:
a third capacitor, having an end connected to the pin on the other one of the end caps, and the other end connected to the cathode of the first diode and the anode of the second diode; and
a fourth capacitor, having an end connected to the pin on the one of the end caps, and the other end connected to the other end of the third capacitor.
15. The LED tube lamp as claimed in claim 13 , wherein the terminal adapter circuit comprises:
a first fuse, having an end connected to the pin on the other one of the end caps, and the other end connected to the cathode of the first diode and the anode of the second diode; and
a second fuse, having an end connected to the pin on the one of the end caps, and the other end connected to the other end of the first fuse.
16. An LED tube lamp, comprising:
a glass tube;
two end caps, each of the two end caps coupled to a respective end of the glass tube;
an LED light strip attached to an inner circumferential surface of the glass tube;
a plurality of LED light sources mounted on the LED light strip;
at least two first soldering pads arranged at one end of the LED light strip;
at least two through holes in the LED light strip, each of the two through holes penetrating the respective first soldering pad and the LED light strip;
a protective layer disposed on a surface of the LED light strip, the protective layer comprising at least two first opening to expose the two first soldering pads; and
a power supply module comprising a printed circuit board and configured to drive the plurality of LED light sources, the printed circuit board comprising at least two second soldering pads, one of the two first soldering pads soldered to one of the respective second soldering pads by a solder,
wherein the power supply module at least comprises a rectifying circuit and a filtering circuit coupled to the rectifying circuit, and the solder is disposed on one of the two first soldering pads, one of the respective second soldering pads and in one of the respective through holes.
17. The LED tube lamp as claimed in claim 16 , wherein the protective layer further comprises a plurality of second openings thereon for disposing the plurality of LED light sources.
18. The LED tube lamp as claimed in claim 17 , wherein the protective layer further comprises a third opening adjacent to the two first openings.
19. The LED tube lamp as claimed in claim 17 , wherein the LED light strip comprises a recognizing mark arranged adjacent to the two first openings.
20. The LED tube lamp as claimed in claim 17 , wherein the glass tube comprises a diffusing layer coated on the inner circumferential surface of the glass tube.
21. The LED tube lamp as claimed in claim 20 , wherein the end of the LED light strip is detached from the inner circumferential surface of the glass tube and soldered on the printed circuit board.
22. The LED tube lamp as claimed in claim 21 , wherein the filtering circuit comprises:
a first capacitor, having an end coupled to a first output terminal of the rectifying circuit, and the other end coupled to a second output terminal of the rectifying circuit.
23. The LED tube lamp as claimed in claim 22 , wherein the filtering circuit further comprises:
an EMI-reducing capacitor, coupled between input terminals of the rectifying circuit.
24. The LED tube lamp as claimed in claim 22 , wherein the filtering circuit further comprises:
a first resistor, having an end coupled to a pin on one of the end caps; and
a second capacitor, having an end coupled to the other end of the first resistor, and the other end coupled to one of the input terminals of the rectifying circuit.
25. The LED tube lamp as claimed in claim 24 , wherein the filtering circuit further comprises:
a passive component, coupled to the second capacitor in parallel.
26. The LED tube lamp as claimed in claim 25 , wherein the passive component is an inductor.
27. The LED tube lamp as claimed in claim 22 , wherein the rectifying circuit comprises:
a first diode, having an anode connected to the second output terminal, and a cathode connected to a pin on one of the end caps;
a second diode, having an anode connected to the second output terminal, and a cathode connected to a pin on the other one of the end caps;
a third diode, having an anode connected to the pin on the one of the end caps, and a cathode connected to the first output terminal; and
a fourth diode, having an anode connected to the pin on the other one of the end caps, and a cathode connected to the first output terminal.
28. The LED tube lamp as claimed in claim 27 , wherein the rectifying circuit further comprises:
a terminal adapter circuit, coupled to the cathode of the first diode, the anode of the second diode and the pins on both of the end caps, and configured to transmit signal received from at least one of the pins to the cathode of the first diode and the anode of the second diode.
29. The LED tube lamp as claimed in claim 28 , wherein the terminal adapter circuit comprises:
a third capacitor, having an end connected to the pin on the other one of the end caps, and the other end connected to the cathode of the first diode and the anode of the second diode; and
a fourth capacitor, having an end connected to the pin on the one of the end caps, and the other end connected to the other end of the third capacitor.
30. The LED tube lamp as claimed in claim 28 , wherein the terminal adapter circuit comprises:
a first fuse, having an end connected to the pin on the other one of the end caps, and the other end connected to the cathode of the first diode and the anode of the second diode; and
a second fuse, having an end connected to the pin on the one of the end caps, and the other end connected to the other end of the first fuse.
31. An LED tube lamp, comprising:
a glass tube;
two end caps, each of the two end caps coupled to a respective end of the glass tube;
an LED light strip attached to an inner circumferential surface of the glass tube;
a plurality of LED light sources mounted on the LED light strip;
at least two first soldering pads arranged at one end of the LED light strip;
a protective layer disposed on a surface of the LED light strip, the protective layer comprising at least two first opening to expose the two first soldering pads; and
a power supply module comprising a printed circuit board and configured to drive the plurality of LED light sources, the printed circuit board comprising at least two second soldering pads, one of the two first soldering pads soldered to one of the respective second soldering pads by a solder,
wherein the power supply module at least comprises a rectifying circuit and a filtering circuit coupled to the rectifying circuit, and the solder is disposed on one of the two first soldering pads and one of the respective second soldering pads and covering an edge of the end of the LED light strip.
32. The LED tube lamp as claimed in claim 31 , wherein the protective layer further comprises a plurality of second openings thereon for disposing the plurality of LED light sources.
33. The LED tube lamp as claimed in claim 32 , wherein the protective layer further comprises a third opening adjacent to the two first openings.
34. The LED tube lamp as claimed in claim 32 , wherein the LED light strip comprises a recognizing mark arranged adjacent to the two first openings.
35. The LED tube lamp as claimed in claim 32 , wherein the glass tube comprises a diffusing layer coated on the inner circumferential surface of the glass tube.
36. The LED tube lamp as claimed in claim 35 , wherein the end of the LED light strip is detached from the inner circumferential surface of the glass tube and soldered on the printed circuit board.
37. The LED tube lamp as claimed in claim 36 , wherein the filtering circuit comprises:
a first capacitor, having an end coupled to a first output terminal of the rectifying circuit, and the other end coupled to a second output terminal of the rectifying circuit.
38. The LED tube lamp as claimed in claim 37 , wherein the filtering circuit further comprises:
an EMI-reducing capacitor, coupled between input terminals of the rectifying circuit.
39. The LED tube lamp as claimed in claim 37 , wherein the filtering circuit further comprises:
a first resistor, having an end coupled to a pin on one of the end caps; and
a second capacitor, having an end coupled to the other end of the first resistor, and the other end coupled to one of the input terminals of the rectifying circuit.
40. The LED tube lamp as claimed in claim 39 , wherein the filtering circuit further comprises:
a passive component, coupled to the second capacitor in parallel.
41. The LED tube lamp as claimed in claim 40 , wherein the passive component is an inductor.
42. The LED tube lamp as claimed in claim 37 , wherein the rectifying circuit comprises:
a first diode, having an anode connected to the second output terminal, and a cathode connected to a pin on one of the end caps;
a second diode, having an anode connected to the second output terminal, and a cathode connected to a pin on the other one of the end caps;
a third diode, having an anode connected to the pin on the one of the end caps, and a cathode connected to the first output terminal; and
a fourth diode, having an anode connected to the pin on the other one of the end caps, and a cathode connected to the first output terminal.
43. The LED tube lamp as claimed in claim 42 , wherein the rectifying circuit further comprises:
a terminal adapter circuit, coupled to the cathode of the first diode, the anode of the second diode and the pins on both of the end caps, and configured to transmit signal received from at least one of the pins to the cathode of the first diode and the anode of the second diode.
44. The LED tube lamp as claimed in claim 43 , wherein the terminal adapter circuit comprises:
a third capacitor, having an end connected to the pin on the other one of the end caps, and the other end connected to the cathode of the first diode and the anode of the second diode; and
a fourth capacitor, having an end connected to the pin on the one of the end caps, and the other end connected to the other end of the third capacitor.
45. The LED tube lamp as claimed in claim 43 , wherein the terminal adapter circuit comprises:
a first fuse, having an end connected to the pin on the other one of the end caps, and the other end connected to the cathode of the first diode and the anode of the second diode; and
a second fuse, having an end connected to the pin on the one of the end caps, and the other end connected to the other end of the first fuse.