# US 11,445,588 B1 · Light-emitting diode lamp with afterglow-proof function

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- Number: US 11,445,588 B1
- Document ID: US11445588B1
- Status: Granted
- Kind: B1
- Application number: 17/400,101
- Filed: 2021-08-11
- Granted: 2022-09-13
- Earliest claimed: 2021-04-14
- Assignees: Xiamen PVTECH Co., Ltd.
- Applicants: Xiamen PVTECH Co., Ltd.
- Inventors: Fuxing Lu; Zhirong Lin
- Web page: https://patentgrep.com/patent/US11445588B1

## CPC

- H05B 45/44: with an active control inside an LED matrix
- H05B 45/59: for reducing or suppressing flicker or glow effects
- H05B 45/37: Converter circuits
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

A light-emitting diode lamp with afterglow-proof function is provided, which includes a power input terminal, a control circuit, a switching circuit, a rectifying circuit and a driving circuit. The power input terminal includes a first power input terminal connected to a first node and a second power input terminal connected to a second node. The control circuit is connected to the first and second nodes respectively. The switching circuit includes a first connection pin, a second connection pin, a third connection pin and a fourth connection. The first connection pin and the second connection pin are connected to the first and second nodes respectively. The driving circuit is connected to a plurality of light-emitting diodes. One end of the driving circuit is connected to the third connection pin via the rectifying circuit and the other end of the driving circuit is connected to the fourth connection pin.

## Claims

### Claim 1

A light-emitting diode lamp with afterglow-proof function, comprising:
a power input terminal, comprising a first power input terminal connected to a first node and a second power input terminal connected to a second node;
a control circuit, connected to the first node and the second node respectively;
a switching circuit, comprising a first connection pin, a second connection pin, a third connection pin and a fourth connection, wherein the first connection pin and the second connection pin are connected to the first node and the second node respectively;
a rectifying circuit;
a driving circuit, connected to a plurality of light-emitting diodes, wherein one end of the driving circuit is connected to the third connection pin via the rectifying circuit and the other end of the driving circuit is connected to the fourth connection pin; and
a transformer circuit, wherein the first power input terminal and a second power input terminal are respectively connected to the first node and the second node via the transformer circuit.

### Claim 2 (depends on 1)

The light-emitting diode lamp with afterglow-proof function of claim 1, wherein when the first power input terminal and the second power input terminal are connected to an alternating-current power source, the control circuit transmits a control signal to the switching circuit to turn on the switching circuit, whereby the driving circuit drives the light-emitting diodes.

### Claim 3 (depends on 2)

The light-emitting diode lamp with afterglow-proof function of claim 2, wherein when the first power input terminal and the second power input terminal fail to connect to an alternating-current power source, the control circuit stops transmitting the control signal to the switching circuit in order to turn off the switching circuit.

### Claim 4 (depends on 1)

The light-emitting diode lamp with afterglow-proof function of claim 1, wherein the switching circuit is disposed between the rectifying circuit and the driving circuit.

### Claim 5 (depends on 1)

The light-emitting diode lamp with afterglow-proof function of claim 1, wherein the switching circuit is a mechanical switch.

### Claim 6 (depends on 1)

The light-emitting diode lamp with afterglow-proof function of claim 1, wherein the rectifying circuit is a bridge rectifier.

### Claim 7 (depends on 1)

The light-emitting diode lamp with afterglow-proof function of claim 1, wherein the control circuit comprises a bridge rectifier and a control chip.

### Claim 8 (depends on 1)

The light-emitting diode lamp with afterglow-proof function of claim 1, wherein the first power input terminal is a live wire and the second power input terminal is a neutral wire.

### Claim 9 (depends on 1)

The light-emitting diode lamp with afterglow-proof function of claim 1, wherein the first power input terminal is a neutral wire and the second power input terminal is a live wire.