LED constant current drive circuit

A technology of constant current drive and constant current circuit, which is applied in the direction of circuit layout, lamp circuit layout, electric light source, etc. It can solve the problem of non-adjustable LED brightness and achieve the effect of improving life and preventing battery discharge

Active Publication Date: 2013-03-27
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an LED drive circuit with adjustable brightness for the defect that the brightness of the LED in the prior art cannot be adjusted.

Method used

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  • LED constant current drive circuit
  • LED constant current drive circuit
  • LED constant current drive circuit

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Embodiment Construction

[0022] Such as figure 1 Shows the functional block diagram of the LED constant current drive circuit of the present invention, the LED constant current drive circuit includes a rectifier circuit 100, a step-down regulator circuit 200, a constant current circuit 300, a control circuit 400 and an LED lighting circuit 500, wherein,

[0023] The rectifier circuit 100 is used to convert the input alternating current into direct current, and provide working voltage for the LED lighting circuit and the constant current circuit;

[0024] A constant current circuit 300, used to provide a constant current for the LED lighting circuit;

[0025] The control circuit 400 is used to adjust the constant current circuit to output different constant current values ​​by outputting different voltages;

[0026] The step-down voltage stabilizing circuit 200 is used to convert the high-voltage direct current converted by the rectification circuit into a 5v direct current to provide a working voltag...

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Abstract

The invention relates to an LED constant current drive circuit, which comprises a rectifying circuit, at least one LED light-emitting circuit and at least one constant current circuit connected with the at least one LED light-emitting circuit, wherein the rectifying circuit is used for providing a direct current power supply for the at least one LED light-emitting circuit and the at least one constant current circuit; the at least one constant current circuit is used for providing constant current for the at least one LED light-emitting circuit; the LED constant current drive circuit also comprises a control circuit; and the control circuit can be used for adjusting the at least one constant current circuit by changing the output voltage to output different constant currents. By using theLED constant current drive circuit provided by the invention, the brightness adjustability of the LED lamp can be conveniently realized.

Description

technical field [0001] The invention relates to LED drive technology, in particular to an LED constant current drive circuit with adjustable brightness. Background technique [0002] LED (light-emitting diode) lighting is gradually replacing traditional lighting methods due to its high efficiency, energy saving, environmental protection and pollution-free, good visual effects, long life, and no flicker. General LED lamps gather many LED lamps together and make them into a style similar to traditional lamps. LED lamps are widely used in Urban green lighting, festival lights, mine lights, flashlights, indoor and outdoor lighting for motor vehicles. However, the brightness of LED lamps is not as easy to adjust as ordinary incandescent lamps. Adjustable LED brightness has always been a problem that people are eager to solve. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an LED drive circuit with adjustable bright...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/00H05B37/02F21V23/00F21Y101/02
Inventor 周明杰寇军飞
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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