LED power circuit

A technology of LED power supply and LED light source, applied in the electronic field, can solve the problems of low reliability, poor compatibility, low power factor of the power supply, etc., and achieve the effects of high compatibility and reliability, prevention of current impact, and high efficiency

Inactive Publication Date: 2010-02-24
KINGLUMI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of low power factor, poor compatibility and low reliability of the prior art LED power supply, it is necessary to provide an LED power supply circuit with high power factor, good compatibility and high reliability

Method used

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Embodiment Construction

[0023] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] see figure 1 , is a schematic block diagram of a preferred embodiment of the LED power supply circuit of the present invention. The LED power supply circuit 1 includes a dimmer 10 , a bridge rectifier circuit 20 , a drive circuit 30 , a transformer rectifier circuit 40 , a switch control circuit 50 , a feedback circuit 60 and an LED lamp 70 . The dimmer 10 is connected to the bridge rectifier circuit 20 . The bridge rectifier circuit 20 is connected to the driving circuit 30 . The driving circuit 30 is connected to the transformer rectifying circuit 40 . The LED lamp is connected to the transformer and rectifier circuit 40 . The switch control circuit 50 is connected to the transformer and rectifier circuit 40 , and the transformer positive circuit 40 is also connected to the switch control circuit 50 through the feedback circuit 60 .

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PUM

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Abstract

The invention relates to an LED power circuit comprising a bridge rectifier circuit, a driving circuit, a transformation rectification circuit, a switch circuit, a feedback circuit and an LED light-source circuit. The bridge rectifier circuit is used for rectifying AC power input by commercial power; the driving circuit is used for keeping the LED power circuit connecting to a traditional dimmer to work normally; the transformation rectification circuit is used for providing working current for the LED power circuit under the control of the switch circuit; and the feedback circuit feeds back a working voltage to the switch circuit from the transformation rectification circuit.

Description

technical field [0001] The invention belongs to the field of electronic technology, and relates to a power supply circuit, in particular to an LED power supply circuit for lighting. Background technique [0002] LED lighting is gradually replacing most traditional lighting methods and becoming the mainstream of lighting technology development due to its advantages of high efficiency, energy saving, environmental protection and pollution-free, good visual effect, and long life. General LED lamps gather many LED lamp beads together to make a style similar to traditional lamps, such as LED fluorescent lamps, LED ceiling lamps, LED spotlights and the like. However, in the technical field of LED lighting, there are still many problems that hinder the popularization and application of LED lighting. [0003] The dimming circuit of traditional lamps such as incandescent lamps and halogen lamps is to connect a thyristor in series in front of the power line for dimming. When the thy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H02M7/08
Inventor 刘单罗吉国
Owner KINGLUMI
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