LED tube lamp

• US 10,487,991 B2
• Filed: 02/12/2019
• Issued: 11/26/2019
• Est. Priority Date: 03/10/2015
• Status: Active Grant

• Current Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Original Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Inventors: Xiong, Aiming, Ye, Qifeng, Zhang, Yueqiang
• Primary Examiner(s): Richardson, Jany
• Application Number:
  US16/273,439
• Publication Number:
  US 20190170305A1
• Time in Patent Office: 287 Days
• Field of Search: None
• CPC Class Codes: F21K 9/275 Details of bases or housings, i.e. the parts between the light-generating element and the end caps; Arrangement of components within bases or housings F21K9/278 takes precedence
• CPC Class Codes: F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/66 Details of globes or covers forming part of the light source
• CPC Class Codes: F21V 25/10 coming into action when lighting device is overloaded, e.g. thermal switch
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/345 Current stabilisation; Maintaining constant current
• CPC Class Codes: H05B 45/3578 Emulating the electrical or functional characteristics of discharge lamps
• CPC Class Codes: H05B 45/36 Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: H05B 45/3725 Switched mode power supply [SMPS]
• CPC Class Codes: H05B 45/50 responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
• CPC Class Codes: H05B 45/59 for reducing or suppressing flicker or glow effects
• CPC Class Codes: H05B 47/24 Circuit arrangements for protecting against overvoltage
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

An LED tube lamp includes a lamp tube; an LED light strip disposed inside the lamp tube and comprising a mounting region and a connecting region, a plurality of LED light sources mounted on the mounting region and at least two first connecting pads arranged on the connecting region; a fixing structure disposed inside the lamp tube and extending along the longitudinal direction of the lamp tube, the fixing structure comprising a first end fixedly connected to an inner circumferential surface of the lamp tube and second end fixedly connected to the LED light strip; a power supply module disposed on the fixing structure and electrically connecting to the LED light strip via the two first connecting pads, the power supply module comprising a circuit board separate from the light strip and a plurality of electronic components mounted on the circuit board; and two end caps attached to two ends of the lamp tube respectively. The power supply module comprises at least a rectifying circuit and a filtering circuit, wherein the rectifying circuit is coupled to two pins to receive an external signal, and the filtering circuit is coupled to the rectifying circuit and is configured to receive a signal from the rectifying circuit.

Claims

1. An LED tube lamp, comprising:

a lamp tube;

an LED light strip disposed inside the lamp tube and comprising a mounting region and a connecting region, a plurality of LED light sources mounted on the mounting region and at least two first connecting pads arranged on the connecting region;

a fixing structure disposed inside the lamp tube and extending along the longitudinal direction of the lamp tube, the fixing structure comprising a first end fixedly connected to an inner circumferential surface of the lamp tube and second end fixedly connected to the LED light strip;

a power supply module disposed on the fixing structure and electrically connecting to the LED light strip via the two first connecting pads, the power supply module comprising a circuit board separate from the light strip and a plurality of electronic components mounted on the circuit board; and

two end caps attached to two ends of the lamp tube respectively,

wherein, the power supply module comprises at least a rectifying circuit and a filtering circuit, the rectifying circuit is coupled to two pins to receive an external signal, and the filtering circuit is coupled to the rectifying circuit and is configured to receive a signal from the rectifying circuit.

2. The LED tube lamp of claim 1, wherein the LED light strip further comprises a wiring layer, and the plurality of LED light sources are mounted on the wiring layer.

3. The LED tube lamp of claim 2, wherein the LED light strip further comprises a protection layer disposed on a first surface of the wiring layer, and the plurality of LED light sources are mounted on the first surface of the wiring layer.

4. The LED tube lamp of claim 3, wherein the LED light strip further comprises a dielectric layer disposed on a second surface of the wiring layer.

5. The LED tube lamp of claim 3, wherein the fixing structure further comprises a curvilinear rib or a vertical rib, wherein the fixing structure connects to the LED light strip and attaches to the inner surface of the lamp tube.

6. The LED tube lamp of claim 3, wherein a portion of the connecting region and a portion of the circuit board are disposed on each other in the LED tube lamp.

7. The LED tube lamp of claim 6, wherein the two first connecting pads are arranged on the portion of the connecting region.

8. The LED tube lamp of claim 7, wherein the circuit board comprises at least two second connecting pads soldered to the two first connecting pads.

9. The LED tube lamp of claim 6, wherein a portion of the fixing structure, a portion of the connecting region, and a portion of the circuit board are adjacently stacked with each other in the LED tube lamp.

10. The LED tube lamp of claim 9, wherein the portion of the fixing structure, the portion of the connecting region, and the portion of the circuit board are adjacently stacked with each other in a radial direction of the LED tube lamp.

11. The LED tube lamp of claim 9, wherein, the power supply module further comprises a driving circuit, wherein the driving circuit is coupled to the filtering circuit and is configured to receive a signal from the filtering circuit.

12. The LED tube lamp of claim 11, wherein the driving circuit comprises one of a buck converter, a boost converter and a buck-boost converter.

13. The LED tube lamp of claim 12, wherein the filtering circuit comprises a pi filter circuit comprising two capacitors and one inductor.

14. The LED tube lamp of claim 13, wherein the power supply module further comprises an installation detection circuit, and the installation detection circuit is coupled to the rectifying circuit and the filtering circuit.

15. The LED tube lamp of claim 13, wherein the power supply module further comprises an over voltage protection circuit, the over voltage protection circuit coupled to the filtering circuit for detecting a filtered signal.

16. An LED tube lamp, comprising:

a lamp tube;

an LED light strip disposed inside the lamp tube and comprising a mounting region and a connecting region, a plurality of LED light sources mounted on the mounting region and at least two first connecting pads arranged on the connecting region;

a fixing structure disposed inside the lamp tube and extending along the longitudinal direction of the lamp tube, the fixing structure comprising a first end fixedly connected to an inner circumferential surface of the lamp tube and second end fixedly connected to the LED light strip;

a power supply module comprising a circuit board separate from the light strip and a plurality of electronic components mounted on the circuit board, the circuit board electrically connecting to the LED light strip via the two first connecting pads and adjacently stacked with a portion of the connecting region in the LED tube lamp; and

two end caps attached to two ends of the lamp tube respectively,

wherein, the power supply module comprises at least a rectifying circuit and a filtering circuit, the rectifying circuit is coupled to two pins to receive an external signal, and the filtering circuit is coupled to the rectifying circuit and is configured to receive a signal from the rectifying circuit.

17. The LED tube lamp of claim 16, wherein the LED light strip further comprises a wiring layer, and the plurality of LED light sources are mounted on the wiring layer.

18. The LED tube lamp of claim 17, wherein the LED light strip further comprises a protection layer disposed on a first surface of the wiring layer, and the plurality of LED light sources are mounted on the first surface of the wiring layer.

19. The LED tube lamp of claim 18, wherein the LED light strip further comprises a dielectric layer disposed on a second surface of the wiring layer.

20. The LED tube lamp of claim 18, wherein the fixing structure further comprises a curvilinear rib or a vertical rib, wherein the fixing structure connects to the LED light strip and attaches to the inner surface of the lamp tube.

21. The LED tube lamp of claim 18, wherein the two first connecting pads are arranged on the portion of the connecting region.

22. The LED tube lamp of claim 21, wherein the circuit board comprises at least two second connecting pads soldered to the two first connecting pads.

23. The LED tube lamp of claim 18, wherein a portion of the fixing structure, the portion of the connecting region, and a portion of the circuit board are adjacently stacked with each other in the LED tube lamp.

24. The LED tube lamp of claim 23, wherein the portion of the fixing structure, the portion of the connecting region, and the portion of the circuit board are adjacently stacked with each other in a radial direction of the LED tube lamp.

25. The LED tube lamp of claim 23, wherein, the power supply module further comprises a driving circuit, wherein the driving circuit is coupled to the filtering circuit and is configured to receive a signal from the filtering circuit.

26. The LED tube lamp of claim 25, wherein the driving circuit comprises one of a buck converter, a boost converter and a buck-boost converter.

27. The LED tube lamp of claim 26, wherein the filtering circuit comprises a pi filter circuit comprising two capacitors and one inductor.

28. The LED tube lamp of claim 27, wherein the power supply module further comprises an installation detection circuit, and the installation detection circuit is coupled to the rectifying circuit and the filtering circuit.

29. The LED tube lamp of claim 27, wherein the power supply module further comprises an over voltage protection circuit, the over voltage protection circuit coupled to the filtering circuit for detecting a filtered signal.

30. An LED tube lamp, comprising:

a lamp tube;

an LED light strip disposed inside the lamp tube and comprising a mounting region and a connecting region, a plurality of LED light sources mounted on the mounting region and at least two first connecting pads arranged on the connecting region;

a fixing structure disposed inside the lamp tube and extending along the longitudinal direction of the lamp tube, the fixing structure comprising a first end fixedly connected to an inner circumferential surface of the lamp tube and second end fixedly connected to the LED light strip;

a power supply module comprising a circuit board separate from the light strip and a plurality of electronic components mounted on the circuit board, the circuit board electrically connecting to the LED light strip via the two first connecting pads and adjacently stacked with the fixing structure in the LED tube lamp; and

two end caps attached to two ends of the lamp tube respectively,

wherein the power supply module comprises at least a rectifying circuit and a filtering circuit, the rectifying circuit is coupled to two pins to receive an external signal, and the filtering circuit is coupled to the rectifying circuit and is configured to receive a signal from the rectifying circuit.

31. The LED tube lamp of claim 30, wherein the LED light strip further comprises a wiring layer, and the plurality of LED light sources are mounted on the wiring layer.

32. The LED tube lamp of claim 31, wherein the LED light strip further comprises a protection layer disposed on a first surface of the wiring layer, and the plurality of LED light sources are mounted on the first surface of the wiring layer.

33. The LED tube lamp of claim 32, wherein the LED light strip further comprises a dielectric layer disposed on a second surface of the wiring layer.

34. The LED tube lamp of claim 32, wherein the fixing structure further comprises a curvilinear rib or a vertical rib, wherein the fixing structure connects to the LED light strip and attaches to the inner surface of the lamp tube.

35. The LED tube lamp of claim 32, wherein the circuit board comprises at least two second connecting pads soldered to the two first connecting pads.

36. The LED tube lamp of claim 32, wherein a portion of the fixing structure, a portion of the connecting region, and a portion of the circuit board are adjacently stacked with each other in the LED tube lamp.

37. The LED tube lamp of claim 36, wherein the portion of the fixing structure, the portion of the connecting region, and the portion of the circuit board are adjacently stacked with each other in a radial direction of the LED tube lamp.

38. The LED tube lamp of claim 36, wherein, the power supply module further comprises a driving circuit, wherein the driving circuit is coupled to the filtering circuit and is configured to receive a signal from the filtering circuit.

39. The LED tube lamp of claim 38, wherein the driving circuit comprises one of a buck converter, a boost converter and a buck-boost converter.

40. The LED tube lamp of claim 39, wherein the filtering circuit comprises a pi filter circuit comprising two capacitors and one inductor.

41. The LED tube lamp of claim 40, wherein the power supply module further comprises an installation detection circuit, and the installation detection circuit is coupled to the rectifying circuit and the filtering circuit.

42. The LED tube lamp of claim 40, wherein the power supply module further comprises an over voltage protection circuit, the over voltage protection circuit coupled to the filtering circuit for detecting a filtered signal.