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Light emitting diode (LED) drive unit

A light-emitting diode and driving device technology, applied in the field of light-emitting diode driving devices, can solve the problems of high manufacturing cost and the like

Inactive Publication Date: 2014-11-19
连展科技电子(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the fact that the existing light-emitting diode driving device must use a microprocessor with PWM dimming function and integrated circuits to produce excessively high manufacturing costs, the main purpose of this creation is to provide a light-adjustable LED that uses MOS to adjust light. The light-emitting diode drive device, so it is not necessary to use a microprocessor and body circuit with PWM dimming function to save manufacturing costs

Method used

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  • Light emitting diode (LED) drive unit
  • Light emitting diode (LED) drive unit
  • Light emitting diode (LED) drive unit

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Embodiment Construction

[0025] see figure 1 As shown, the invention is a light-emitting diode driving circuit, which includes a microprocessor 10 , a constant current control circuit 20 and at least one dimming circuit 30 . The microprocessor 10 has at least one control signal output terminal RA4 for outputting a control signal. The constant current control circuit 20 has an integrated circuit 21, the integrated circuit 21 includes a LED output positive terminal SW and a LED output negative terminal CS, the LED output positive terminal SW is electrically connected to an LED module 40 and output a constant current to the LED module 40, so that the LED module 40 emits light using the constant current. In this preferred embodiment, the maximum current value of the constant current is 1 ampere.

[0026] Please also refer to figure 2 As shown, the dimming circuit 30 includes a MOSFET 31, the gate of the MOSFET 31 is electrically connected to the control signal output terminal RA4, its drain is electr...

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Abstract

The invention provides a light emitting diode (LED) drive unit, comprising a microprocessor having a control signal output end, a constant current control circuit having an integrated circuit, and at least one dimming circuit having a MOSFET (Metal-Oxide -Semiconductor Field Effect Transistor). The integrated circuit has an LED output positive end and an LED output negative end, wherein the LED output positive end is electrically connected to a positive end of an LED module group, and the LED output negative end is electrically connected to a source electrode of the MOSFET. A drain electrode of the MOSFET is electrically connected to a negative end of the LED module group. A signal output end of the microprocessor is electrically connected to a gate electrode of the MOSFET, and outputs a control signal for controlling on-off of the LED module group, so that the working cycle of the LED module group is adjusted, and the purpose of dimming is achieved further. The invention can select an integrated circuit without a PWM function for lowering manufacturing cost.

Description

technical field [0001] The invention relates to a light-emitting diode driving device, in particular to a light-emitting diode driving device adopting Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) dimming. Background technique [0002] see image 3 As shown, the prior art light-emitting diode (Light-Emitting Diode; LED) driving device includes a microprocessor 50 , a constant current control circuit 60 and a signal amplifying circuit 70 . The microprocessor 50 has a Pulse-Width Modulation (PWM) dimming signal output terminal RE for outputting a PWM dimming signal. The constant current control circuit 60 includes an integrated circuit 61, and the integrated circuit 61 has a PWM dimming signal input terminal DIM, a positive LED output terminal SW and a negative LED output terminal CS. The PWM dimming signal output terminal RE of the microprocessor 50 amplifies the PWM dimming signal through the signal amplifier circuit 70 and then inputs it to the PWM dimming sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 周国华李继周袁吉顺王慧娟
Owner 连展科技电子(昆山)有限公司
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