A LED lamp based on controllable constant current source drive technology

A technology of LED lamps and constant current sources, applied in the field of LED lamps, can solve the problems of low working voltage, small adaptable range, poor reliability of driving circuits, etc., and achieve the effect of stable current

Active Publication Date: 2020-09-22
佛山市利升光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] LED lamps are lamps using LED devices. LED devices have the characteristics of low operating voltage, low power consumption, high luminous efficiency and long life. LED devices are non-linear devices. When the LED device is turned on, as long as the LED device A small change in the voltage on the LED will cause excessive current flowing through the LED device and damage the LED device
[0003] The driving circuit of the existing low-power LED lamps has poor reliability, small application range, and complex structure. Therefore, it is necessary to design a high-efficiency driving circuit for driving low-power LED lamps.

Method used

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  • A LED lamp based on controllable constant current source drive technology

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Embodiment 1

[0012] Embodiment 1, reference figure 1 , an LED lamp based on controllable constant current source drive technology, comprising a lamp body, the lamp body is provided with an LED light-emitting device 2, and the lamp body is provided with a driving circuit 1, and the driving circuit 1 includes: a resistor R1 , R2, R3, R4, R5, R6, R7, R8, operational amplifiers U1, U2, U3, capacitor C1, transistor Q1, and one end of resistor R1 is connected to the output terminal of the voltage source. As optimization, the voltage source includes: a single chip microcomputer And its peripheral circuit, the filter capacitor C2, the output port P1.0 of the single-chip microcomputer are respectively connected with one end of the resistor R1, one end of the filter capacitor C2, the other end of the filter capacitor C2 is connected to the ground, and the other end of the resistor R1 is connected with the operation The inverting input terminal of the amplifier U1 is connected to one end of the resis...

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Abstract

The invention discloses an LED lamp based on a controllable constant current source driving technology, comprising a lamp body, the lamp body is provided with an LED light-emitting device, and the lamp body is provided with a driving circuit, and the driving circuit includes: a resistor R1 , R2, R3, R4, R5, R6, R7, R8, operational amplifiers U1, U2, U3, capacitor C1, triode Q1, the present invention obtains the current abnormality flowing through the LED light-emitting device through the feedback loop, and compares them through the comparison circuit The abnormal signal is amplified by the proportional amplification circuit and applied to the triode Q1, so as to adjust the current flowing through the LED light-emitting device and achieve the purpose of stabilizing the current. The invention can be used in people's daily life.

Description

technical field [0001] The invention relates to the technical field of lamps, in particular to an LED lamp based on a controllable constant current source driving technology. Background technique [0002] LED lamps are lamps using LED devices. LED devices have the characteristics of low operating voltage, low power consumption, high luminous efficiency and long life. LED devices are non-linear devices. When the LED device is turned on, as long as the LED device If the voltage on the LED changes slightly, the current flowing through the LED device will be too large and the LED device will be damaged. [0003] The existing low-power LED lamps have poor reliability, narrow application range, and complex structure of the driving circuit. Therefore, it is very necessary to design an efficient driving circuit for driving low-power LED lamps. Contents of the invention [0004] The object of the present invention is to provide a lamp with a simple structure LED driving circuit. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/345H05B45/325H05B44/00
CPCH05B45/37
Inventor 王清平张志强黄艳清林冬青
Owner 佛山市利升光电有限公司
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