LED lamp protection circuit

Patent metadata

Field	Value
Publication number	US-10959309-B2
Application number	US-201816188611-A
Country	US
Kind code	B2
Filing date	Nov 13, 2018
Priority date	Nov 14, 2017
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

An LED lamp protection circuit comprising: a driving circuit, a rectifier circuit coupled with the driving circuit, an LED luminous component circuit coupled with the rectifier circuit, and an arcing protection circuit coupled between the rectifier circuit and the LED luminous component circuit. The arcing protection circuit and the LED luminous component circuit are connected in parallel. When the LED lamp works under a normal condition, the arcing protection circuit is in blocking state. When at least one circuit between the rectifier circuit and the LED luminous component circuit opens, the arcing protection circuit is turned on, the driving circuit and the arcing protection circuit form a loop circuit to extinguish arc.

First claim

The invention claimed is:

1. A LED lamp protection circuit comprising:
a driving circuit;
a rectifying circuit coupled with the driving circuit;
an LED luminous component circuit coupled with the rectifying circuit;
an arcing protection circuit coupled between the rectifying circuit and the LED luminous component circuit, and connected in parallel to the LED luminous component circuit, wherein the arcing protection circuit comprises a reverse diode; and
a non-resettable thermal fuse coupled between the rectifying circuit and the reverse diode, the non-resettable thermal fuse to be blown in the event of a high temperature generated by the arcing protection circuit;
wherein one end of the non-resettable thermal fuse is connected to a first DC voltage output terminal of the rectifying circuit, the other end of the non-resettable thermal fuse is connected to a first terminal of the reverse diode, and a second terminal of the reverse diode is connected to a second DC voltage output terminal of the rectifying circuit;
wherein the arcing protection circuit is in a blocking state when the LED lamp works at a normal condition, and the arcing protection circuit switches on, and the driving circuit and the arcing protection circuit form a loop circuit to extinguish arc when at least one circuit between the rectifying circuit and the LED luminous component circuit opens.

2. The LED lamp protection circuit of claim 1 , wherein an anode of the reverse diode is coupled to a DC voltage negative output terminal of the rectifying circuit, and a cathode of the reverse diode is coupled to a DC voltage positive output terminal of the rectifying circuit.

3. The LED lamp protection circuit of claim 1 , wherein the first DC voltage output terminal is a DC voltage positive output terminal of the rectifying circuit, wherein the first terminal of the reverse diode is a cathode of the reverse diode, wherein the second terminal of the reverse diode is an anode of the reverse diode, and wherein the second DC voltage output terminal is a DC voltage negative output terminal of the rectifying circuit.

4. The LED lamp protection circuit of claim 1 , wherein the first DC voltage output terminal is a DC voltage negative output terminal of the rectifying circuit, wherein the first terminal of the reverse diode is an anode of the reverse diode, wherein the second terminal of the reverse diode is a cathode of the reverse diode, and wherein the second DC voltage output terminal is a DC voltage positive output terminal of the rectifying circuit.

5. The LED lamp protection circuit of claim 1 , wherein the arcing protection circuit comprises a bidirectional voltage protection element.

6. The LED lamp protection circuit of claim 5 , wherein the bidirectional voltage protection element comprises a silicon diode for alternating current (SIDAC).

7. The LED lamp protection circuit of claim 5 , wherein one end of the bidirectional voltage protection element is connected to a DC voltage positive output terminal of the rectifying circuit, the other end of the bidirectional voltage protection element is connected to a DC voltage negative output terminal of the rectifying circuit.

8. A LED lamp protection circuit comprising:
a driving circuit;
a rectifying circuit coupled with the driving circuit;
an LED luminous component circuit coupled with the rectifying circuit; and
an arcing protection circuit coupled between the rectifying circuit and the LED luminous component circuit, and connected in parallel to the LED luminous component circuit,
wherein the arcing protection circuit comprises a reverse diode, and the LED lamp protection circuit comprises a non-resettable thermal fuse coupled between the rectifying circuit and the reverse diode;
wherein the arcing protection circuit is in a blocking state when the LED lamp works at a normal condition, and the arcing protection circuit switches on, and the driving circuit and the arcing protection circuit form a loop circuit to extinguish arc when at least one circuit between the rectifying circuit and the LED luminous component circuit opens;
wherein one end of the non-resettable thermal fuse is connected to a DC voltage positive output terminal of the rectifying circuit, the other end of the non-resettable thermal fuse is connected to a cathode of the reverse diode, and an anode of the reverse diode is connected to a DC voltage negative output terminal of the rectifying circuit.

9. A LED lamp protection circuit comprising:
a driving circuit;
a rectifying circuit coupled with the driving circuit;
an LED luminous component circuit coupled with the rectifying circuit; and
an arcing protection circuit coupled between the rectifying circuit and the LED luminous component circuit, and connected in parallel to the LED luminous component circuit,
wherein the arcing protection circuit comprises a reverse diode, and the LED lamp protection circuit comprises a non-resettable thermal fuse coupled between the rectifying circuit and the reverse diode;
wherein the arcing protection circuit is in blocking state when the LED lamp works at a normal condition, and the arcing protection circuit switches on, and the driving circuit and the arcing protection circuit form a loop circuit to extinguish arc when at least one circuit between the rectifying circuit and the LED luminous component circuit opens;
wherein one end of the non-resettable thermal fuse is connected to a DC voltage positive output terminal of the rectifying circuit, the other end of the non-resettable thermal fuse is connected to a cathode of the reverse diode, and an anode of the reverse diode is connected to a DC voltage negative output terminal of the rectifying circuit; and

wherein the non-resettable thermal fuse is blown by a high temperature generated by the arcing protection circuit after the arcing protection circuit switches on.

Assignees

• Current Lighting Solutions Llc

Inventors

• Wang Tingting
• Wang Fanbin
• Zhang Bo
• Mao Zhu
• Qin Shuyi
• Long Qi

Classifications

• H05B45/50 Primary

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

• H01H37/76 Primary

  Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material · CPC title

• H05B45/56

  involving measures to prevent abnormal temperature of the LEDs · CPC title

• Y02B20/30

  Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] · CPC title

• H05B45/30

  Driver circuits · CPC title