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LED (light-emitting diode) tube and drive circuit thereof

A technology of LED lamp tube and driving circuit, which is applied in the direction of electric lamp circuit layout, electric light source, lighting device, etc., can solve the problems of high failure rate, many components, complicated circuit structure, etc., and achieve the effect of removing components and simple structure.

Inactive Publication Date: 2012-02-15
ZHEJIANG GLOBRIGHT OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the defects of complex circuit structure, many devices and high failure rate in the existing compatible technology that LED fluorescent lamps need to be replaced when they are interchanged with traditional electronic ballast fluorescent lamps and inductive ballast fluorescent lamps, and provide A compatible LED lamp tube and its drive circuit with simple structure and convenient operation

Method used

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  • LED (light-emitting diode) tube and drive circuit thereof
  • LED (light-emitting diode) tube and drive circuit thereof
  • LED (light-emitting diode) tube and drive circuit thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] like Figure 5 and Image 6 As shown, an LED lamp drive circuit includes an input unit 1 , a rectification filter unit 2 , an LED constant current drive unit 3 , a high frequency detection unit 4 and a control unit 5 .

[0038] Preferably, the input unit 1 includes input terminals 11 , 12 , 13 and 14 , AC coupling capacitors C1 and C2 , the AC coupling capacitor C1 is connected in parallel between the input terminals 11 and 12 , and the AC coupling capacitor is connected in parallel between the input terminals 13 and 14 . Capacitor C2.

[0039] Preferably, the rectifier and filter unit 2 includes a first rectifier bridge 21 and a second rectifier bridge 22, and the first rectifier bridge 21 and the second rectifier bridge 22 are respectively composed of four fast rectifier diodes to form a two-phase rectifier bridge , the first rectifier bridge 21 is connected in parallel with the AC coupling capacitor C1 of the input unit 1 ; the second rectifier bridge 22 is connect...

Embodiment 2

[0047] like Figure 5 and Image 6 As shown, an LED lamp includes an LED light source board 6 and an LED lamp drive circuit described in Embodiment 1.

[0048] Preferably, the LED light source board 6 is two independent LED light-emitting units 61 and 62 .

[0049] Preferably, the two normally closed contacts 543 and 544 of the relay 54 of the control unit 5 of the LED light source board 6 are connected in series, and the relay 54 of the control unit 5 performs serial-parallel switching and combination.

[0050] The LED light source board 6 is composed of two independent LED light-emitting units 61 and 62 combined in series and parallel. The positive electrode of the LED light-emitting unit 62 is connected to the output positive electrode of the four-phase rectifier bridge, and the negative electrode of the LED light-emitting unit 61 is connected to the control unit. The positive electrode of the isolation diode , the negative pole of the LED lighting unit 62 is connected to...

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Abstract

The invention discloses an LED (light-emitting diode) tube and a drive circuit thereof.The drive circuit comprises an input unit, a rectification filter unit and an LED constant current drive unit, and further comprises a high frequency detection unit and a control unit. The LED tube disclosed by the invention includes the drive circuit of the LED tube and an LED light source plate, and has simple structure and convenience in use when the LED fluorescent lamp is exchanged with a traditional electronic ballast fluorescent lamp and an inductive ballast fluorescent lamp, without needs of line adjustment and component disassembly.

Description

technical field [0001] The invention relates to a lamp tube and its drive circuit, in particular to an LED lamp tube and its drive circuit. Background technique [0002] LED light is a popular light source at present. LED is a solid-state semiconductor device, which is an energy-saving, environmentally friendly, high-efficiency, and long-life light source. LED lights do not need starters or electronic ballasts, start quickly, have low power, no flicker, are not easy to look tired, super energy-saving and environmentally friendly. Therefore, LED lights are one of the key products developed by the National Green Energy-saving Lighting Project. It is the main product to replace the traditional fluorescent lamp at present. [0003] Since LED fluorescent lamps have different power supply methods from traditional fluorescent lamps with electronic ballasts and fluorescent lamps with magnetic ballasts, to replace traditional fluorescent lamps with LED fluorescent lamps, the circuit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 胡智宁刘志海
Owner ZHEJIANG GLOBRIGHT OPTICAL TECH
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