Power system capable of preventing from mistakenly triggering electric shock protection function of lamp tubes and method thereof

Patent metadata

Field	Value
Publication number	US-11873981-B2
Application number	US-202117521872-A
Country	US
Kind code	B2
Filing date	Nov 9, 2021
Priority date	Sep 30, 2021
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

A power system capable of preventing from mistakenly triggering an electric shock protection function of a lamp tube and the method thereof is provided. The power system includes a live wire input end, a neutral wire input end and a capacitive component. The live wire input end is connected to a first node; the first node is used to connect to the live wire terminal of the electric shock protection circuit of a first light-emitting module. The neutral wire input end is connected to a second node; the second node is used to connect to the neutral wire terminal of the electric shock protection circuit of the first light-emitting module. One end of the capacitive component is connected to the first node and the other end thereof is connected to the second node.

First claim

What is claimed is:

1. A method for preventing from mistakenly triggering an electric shock protection function of a lamp tube, comprising:
connecting one end of a capacitive component to a first node of a live wire input end of a power system;
connecting the other end of the capacitive component to a second node of a neutral wire input end of the power system;
connecting the first node of the live wire input end to a live wire terminal of an electric shock protection circuit of a first light-emitting module, and connecting the second node of the live wire input end to a neutral wire terminal of the electric shock protection circuit of the first light-emitting module, wherein the electric shock protection circuit comprises a bridge rectifier, a switch, a positive output terminal, a negative electrode terminal and a current sampling point, wherein the live wire input end is connected to a first end of the bridge rectifier via the live wire terminal, the neutral wire input end is connected to a second end of the bridge rectifier via the neutral wire terminal, a third end of the bridge rectifier is connected to the positive output terminal, a fourth end of the bridge rectifier is connected to one end of the current sampling point via the switch, and another end the current sampling point is connected to the negative output terminal, wherein the current sampling point is a resistor; and
discharging the current sampling point of the electric shock protection circuit via the capacitive component when the live wire input end is connected to the live wire terminal via the first node and the neutral wire input end is connected to the neutral wire terminal via the second node.

2. The method for preventing from mistakenly triggering the electric shock protection function of the lamp tube of claim 1 , further comprising:
connecting at least one second light-emitting module to the first light-emitting module, wherein the at least one second light-emitting module is connected to the first light-emitting module in parallel.

3. The method for preventing from mistakenly triggering the electric shock protection function of the lamp tube of claim 2 , wherein the first light-emitting module and the at least one second light-emitting module are light-emitting diode lamp tubes.

4. The method for preventing from mistakenly triggering the electric shock protection function of the lamp tube of claim 1 , wherein the live wire input end and the neutral wire input end are connected to the first node and the second node via a voltage transformation module respectively.

Assignees

• Xiamen Pvtech Co Ltd

Inventors

• Lu Fuxing
• Liu Rongtu

Classifications

• F21V25/02 Primary

  coming into action when lighting device is disturbed, dismounted, or broken · CPC title

• H05B45/50 Primary

  responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits · CPC title

• H05B45/54

  in a series array of LEDs · CPC title

• F21Y2103/10

  comprising a linear array of point-like light-generating elements · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title