LED tube lamp

• US 9,955,587 B2
• Filed: 09/21/2015
• Issued: 04/24/2018
• Est. Priority Date: 04/02/2015
• Status: Active Grant

• Current Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Original Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Inventors: Jiang, Tao
• Primary Examiner(s): TUMEBO, TSION M
• Application Number:
  US14/859,370
• Publication Number:
  US 20160295706A1
• Time in Patent Office: 946 Days
• Field of Search: 36224902
• CPC Class Codes: F21K 9/272 Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts F21K9/278 takes precedence
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2107/70 on flexible or deformable supports or substrates, e.g. for changing the light source into a desired form
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/118 specially for flexible printed circuits, e.g. using folded portions
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 2201/09181 Notches in edge pads
• CPC Class Codes: H05K 2201/0969 Apertured conductors
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 3/363 by soldering

Abstract

An LED tube lamp including a lamp tube, an end cap attached to an end of the lamp tube, a power supply disposed in the end cap, and an LED light bar disposed inside the lamp tube. The LED light bar is mounted with LED light sources which are electrically connected to the power supply by way of the LED light bar. The LED light bar includes a bendable circuit sheet which is longer than the lamp tube. A soldering pad is configured and disposed at an end of the bendable circuit sheet. The soldering pad is formed with a through-hole or a notch to allow tin solder to pass through when soldering such that the bendable circuit sheet can be directly soldered and electrically connected to the power supply.

Claims

1. An LED tube lamp, comprising:

a lamp tube;

an end cap attached to an end of the lamp tube;

a power supply disposed in the end cap; and

an LED light bar disposed inside the lamp tube and mounted with a plurality of LED light sources, the LED light sources being electrically connected to the power supply by the LED light bar,

wherein the LED light bar includes a bendable circuit sheet disposed with two soldering pads on the bendable circuit sheet at an end of the bendable circuit sheet, and an electrically insulating hole is formed and disposed between the two soldering pads of the bendable circuit sheet to prevent a short circuit between the two soldering pads when soldering, and

wherein an alignment hole is configured and disposed behind the electrically insulating hole to allow a soldering machine to automatically locate the soldering pads of the bendable circuit sheet.

2. The LED tube lamp of claim 1, wherein the power supply comprises a printed circuit board disposed with two soldering pads corresponding to the two soldering pads of the bendable circuit sheet, and the two soldering pads of the bendable circuit sheet are respectively electrically connected to the two soldering pads of the printed circuit board of the power supply to provide electrical connection between the power supply and the LED light sources.

3. The LED tube lamp of claim 2, wherein the two soldering pads of the bendable circuit sheet point toward the same direction as the two soldering pads of the printed circuit board of the power supply.

4. The LED tube lamp of claim 2, wherein the two soldering pads of the bendable circuit sheet point toward opposite directions from the two soldering pads of the printed circuit board of the power supply.

5. The LED tube lamp of claim 1, wherein at least three soldering pads are disposed on the bendable circuit sheet and arranged in one row or two rows.

6. The LED tube lamp of claim 1, wherein at least one of the soldering pads is formed with a through-hole.

7. The LED tube lamp of claim 6, wherein the through-hole has a diameter of 1 mm to 2 mm.

8. The LED tube lamp of claim 6, wherein the at least one of the soldering pads of the bendable circuit board is formed with a solder ball above the through-hole after soldering is completed, and a diameter of the solder ball is larger than the diameter of the through-hole.

9. The LED tube lamp of claim 6, wherein a distance between the through-hole and an edge of the bendable circuit sheet is 1 mm or less.

10. The LED tube lamp of claim 1, wherein at least one of the soldering pads is formed with a notch at an edge of the bendable circuit sheet.

11. The LED tube lamp of claim 10, wherein the at least one of the soldering pads of the bendable circuit board is formed with a solder ball above the notch after soldering is completed, and a diameter of the solder ball is larger than a diameter of the notch.

12. An LED tube lamp, comprising:

a lamp tube;

an end cap attached to an end of the lamp tube;

a power supply disposed in the end cap; and

an LED light bar disposed inside the lamp tube and mounted with a plurality of LED light sources, the LED light sources being electrically connected to the power supply by the LED light bar;

wherein the LED light bar includes a bendable circuit sheet with a length longer than a length of the lamp tube and is disposed with at least a first soldering pad and an electrically insulating hole at an end of the bendable circuit sheet, and the power supply is disposed with a second soldering pad corresponding to the first soldering pad of the bendable circuit sheet, and

wherein the first soldering pad is formed with a through hole, so that upon soldering, a solder can penetrate through the through hole of the first soldering pad and accumulate around the outer periphery of the opening of the through hole, so that upon cooling and solidifying, the solder between the first soldering pad of the bendable circuit board and the second soldering pad of the power supply forms a rivet structure, wherein the electrically insulating hole is adjacent to the first soldering pad to insulate the first soldering pad, and an alignment hole is configured and disposed behind the electrically insulating hole to allow for locating the first soldering pad of the bendable circuit sheet.

13. The LED tube lamp of claim 12, wherein the first soldering pad is formed with a notch at an edge of the bendable circuit sheet.