LED tube lamp

Patent metadata

Field	Value
Publication number	US-10670197-B2
Application number	US-201916399004-A
Country	US
Kind code	B2
Filing date	Apr 30, 2019
Priority date	Sep 28, 2014
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

An LED tube lamp comprises a lamp tube, two end caps attached at two ends of the lamp tube respectively, a power supply disposed in one of the two end caps or separately in both of the end caps, an LED light strip disposed inside the lamp tube and a protective layer disposed on the LED light strip. The LED light strip comprises a mounting region and a connecting region. The plurality of LED light sources is mounted on the mounting region and two soldering pads are disposed on the connecting region. The mounting region and the connecting region are electrically connecting the plurality of LED light sources with the power supply. The protective layer comprises a plurality of first openings arranged on the mounting region for accommodating the LED light sources and two second openings are arranged on the connecting region for accommodating the two soldering pad.

First claim

What is claimed is:

1. An LED tube lamp, comprising:
an illuminating region comprising at least a portion of a lamp tube;
two non-illuminating regions, each of the two non-illuminating regions coupled to a respective end of the illuminating region and comprising an end cap coupled to a respective end of the lamp tube;
a power supply module disposed in one or two of the non-illuminating regions;
an LED light strip disposed in the LED tube lamp, the LED light strip comprising a mounting region disposed in the illuminating region and a connecting region disposed in one of the non-illuminating regions, the mounting region attached to an inner circumferential surface of the lamp tube;
a plurality of LED light sources mounted on the mounting region;
at least two soldering pads arranged on the connecting region, the mounting region and the connecting region being electrically connected to the plurality of LED light sources and the power supply module; and
a protective layer disposed on a surface of the LED light strip, the protective layer comprising a plurality of first openings arranged on the mounting region for disposing the plurality of LED light sources and at least two second openings arranged on the connecting region for disposing the at least two soldering pads.

2. The LED tube lamp as claimed in claim 1 , wherein the illuminating region comprises at least a portion of the lamp tube, the mounting region of the LED light strip and the plurality of LED light sources, and the two non-illuminating regions comprises two end caps, at least a portion of the connecting region and the power supply module.

3. The LED tube lamp as claimed in claim 2 , wherein the protective layer further comprises a third opening adjacent to the two second openings.

4. The LED tube lamp as claimed in claim 3 , wherein the LED light strip further comprises a fourth opening arranged on the connecting region and corresponding to the third opening on the protective layer, further wherein the third opening and the fourth opening form a through hole.

5. The LED tube lamp as claimed in claim 4 , wherein the through hole is arranged between the two soldering pads.

6. The LED tube lamp as claimed in claim 4 , wherein the through hole allows a soldering machine to recognize the position of the soldering pads during a soldering process.

7. The LED tube lamp as claimed in claim 2 , wherein the LED light strip further comprises a first wiring layer, the plurality of LED light sources are disposed on a first side of the first wiring layer and are electrically connected to the first wiring layer.

8. The LED tube lamp as claimed in claim 7 , wherein the LED light strip further comprises a second wiring layer disposed on a second side of the first wiring layer, further wherein the second wiring layer is made of metal.

9. The LED tube lamp as claimed in claim 8 , wherein the LED light strip further comprises a dielectric layer disposed between the first wiring layer and the second wiring layer.

10. The LED tube lamp as claimed in claim 7 , further comprising a diffusion film coated on a surface of the lamp tube.

11. The LED tube lamp as claimed in claim 10 , wherein the diffusion film is coated on an inner surface of the lamp tube.

12. The LED tube lamp as claimed in claim 10 , wherein the power supply module comprises a circuit board disposed in one of the two non-illuminating regions, and the circuit board is electrically connected to the connecting region via the at least two soldering pads.

13. The LED tube lamp as claimed in claim 12 , wherein the circuit board is parallel to a longitudinal direction of the lamp tube.

14. The LED tube lamp as claimed in claim 2 , wherein the power supply module comprises:
a rectifying circuit, having a first input terminal electrically connected to a pin disposed on one of the two end caps and a second input terminal electrically connected to a pin disposed on the other one of the two end caps,
wherein the rectifying circuit produces a rectified signal between a first rectifying output terminal and a second rectifying output terminal.

15. The LED tube lamp as claimed in claim 14 , wherein the rectifying circuit comprises:
a first rectifying diode, having an anode connected to the second rectifying output terminal and a cathode connected to the second input terminal;
a second rectifying diode, having an anode connected to the second rectifying output terminal and a cathode connected to the first input terminal;
a third rectifying diode, having an anode connected to the second input terminal and a cathode connected to the first rectifying output terminal; and
a fourth rectifying diode, having an anode connected to the first input terminal and a cathode connected to the first rectifying output terminal.

16. The LED tube lamp as claimed in claim 15 , wherein the power supply module further comprises:
a first filtering unit, electrically connected to the first and the second rectifying output terminals to receive the rectified signal, and configured to produce a filtered signal.

17. The LED tube lamp as claimed in claim 16 , wherein the first filtering unit comprises:
a first capacitor, having an end electrically connected to the first rectifying output terminal and the other end electrically connected to the second rectifying output terminal.

18. The LED tube lamp as claimed in claim 17 , wherein the power supply module further comprises:
a second filtering unit, electrically connected between the first input terminal and the pin coupled to the first input terminal.

19. The LED tube lamp as claimed in claim 18 , wherein the second filtering unit comprises:
an inductor, having an end connected to the pin coupled to the first input terminal and the other end connected to the first input terminal.

20. The LED tube lamp as claimed in claim 18 , wherein the power supply module further comprises:
a third filtering unit, electrically connected between one of the two pins and one of the rectifying diodes of the rectifying circuit.

21. The LED tube lamp as claimed in claim 20 , wherein the third filtering unit comprises:
an EMI-reducing capacitor, connected between the pin coupled to the first input terminal and the anode of the third rectifying diode.

22. The LED tube lamp as claimed in claim 17 , wherein the power supply module further comprises:
a driving circuit, electrically connected to the first filtering unit to receive the filtered signal and configured to perform power conversion for converting the filtered signal into a driving signal,
wherein the LED light sources receive the driving signal from output terminals of the driving circuit for emitting light.

23. The LED tube lamp as claimed in claim 22 , wherein the driving circuit comprises:
a controller;
a switch, having a first terminal electrically connected to the end of the first capacitor, a second terminal, and a control terminal coupled to the controller, wherein the switch is turned on or off in response to a signal received from the controller;
a diode, having an anode electrically connected to the other end of the first capacitor and a cathode electrically connected to the second terminal of the switch;
an inductor, having an end electrically connected to the second terminal of the switch, and another end electrically connected to the LED light sources via one of the driving output terminals; and
a second capacitor, having an end electrically connected to the another en

Assignees

• Jiaxing Super Lighting Electric Appliance Co Ltd

Inventors

• Li li-qin
• Jiang Tao
• Yang Chang
• Wang Bao

Classifications

• H05B33/0884

  Electricity · mapped topic

• F21V23/02

  the elements being transformers, impedances {or power supply units, e.g. a transformer with a rectifier} · CPC title

• F21V3/10

  characterised by coatings · CPC title

• F21V7/22

  characterised by materials, surface treatments or coatings, e.g. dichroic reflectors · CPC title

• F21K9/27

  Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes · CPC title