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A led constant current power supply

A technology of constant current power supply and rectifier circuit, applied in the field of power supply, can solve the problems of flicker point dimming, unstable dark light, unevenness, etc.

Active Publication Date: 2019-04-02
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LED lighting has been used more and more widely due to a series of advantages. However, the existing LED lighting power supply based on the traditional thyristor dimmer design has dark light instability, and there are flickering points and dimming points during the dimming process. Problems such as uneven light

Method used

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  • A led constant current power supply
  • A led constant current power supply
  • A led constant current power supply

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0025] refer to figure 1 , a LED constant current power supply, including a thyristor dimmer 1, the input end of the thyristor dimmer 1 is connected to the AC supply voltage (VAC), and the output end of the thyristor dimmer 1 is connected to a rectifier filter circuit; the signal output end of the rectification and filtering circuit is connected to a steady current circuit 5; the steady current circuit 5 is provided with a control signal input end, and the control signal input end is connected to a control circuit 6 for generating a control signal; the steady current circuit 5 outputs a DC power supply The voltage is used to provide an adjustable driving power for the LED.

[0026] The rectification filter circuit includes a rectification circuit 2 and a filter circuit 3, the output end of the ...

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Abstract

The present invention relates to the technical field of power supply, and particularly relates to an LED power supply. The LED constant current power supply includes a triac dimmer, wherein an input of the triac dimmer is connected to an AC power supply voltage, and an output of the triac dimmer is connected to a rectification filter circuit; a signal output of the rectification filter circuit is connected to a constant current circuit; a control signal input is disposed at the constant current circuit, and the control signal input is connected to a control circuit used to generating a control signal according to a reference voltage; and the constant current circuit outputs a DC power supply voltage for providing an adjustable driving power supply to the LED. In the present invention, a phase angle output by the triac dimmer stably controls the current output thereof, thereby achieving dimming effects of the LED, and linear dimming and flexible dimming effect of the LED can also be achieved as well.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to an LED power supply. Background technique [0002] The existing dimming technology for ordinary light sources (incandescent lamps) is mainly thyristor phase modulation dimming, which has a large number of applications in the actual dimming field. LED lighting has been used more and more widely due to a series of advantages. However, the existing LED lighting power supply based on the traditional thyristor dimmer design has dark light instability, and there are flickering points and dimming points during the dimming process. Uneven light and other issues. Contents of the invention [0003] The object of the present invention is to provide an LED constant current power supply to solve the above technical problems. The technical problem solved by the present invention can adopt following technical scheme to realize: [0004] A LED constant current power supply, which inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 陆元成沈晓明
Owner EAST CHINA UNIV OF SCI & TECH