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Driving method of LED (Light-Emitting Diode) circuit

A technology of LED circuit and driving method, applied in circuit layout, electric lamp circuit layout, electric light source, etc., can solve the problems of poor reliability, complex circuit, low installability, etc., to reduce impact, improve reliability, and improve manufacturability. sexual effect

Inactive Publication Date: 2011-03-30
高志刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the traditional street lamp single light source driving method is adopted, not only the circuit is complicated, the reliability is poor, but also the manufacturability is feasible and the installability is low.

Method used

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  • Driving method of LED (Light-Emitting Diode) circuit
  • Driving method of LED (Light-Emitting Diode) circuit

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Embodiment Construction

[0010] Below in conjunction with accompanying drawing and embodiment the present invention is further described,

[0011] Such as figure 1 As shown, ac is the mains 220V / 50Hz input, and the AC / DC module converts the mains into a fixed-value constant-voltage power supply, which is transmitted to the LED driver module through the power supply bus, and the driver module converts the constant-voltage power supply into The working power required by the constant current and constant voltage LED string drives the LED string to emit light stably and efficiently.

[0012] The AC / DC module is specially developed, the input is 220V / 50Hz mains, and the corresponding voltage is output according to the number of LEDs in the LED string. Assuming that there are n LEDs in each LED string, and the working voltage of each LED is 3V, then The constant output of the AC / DC module is 3n volts.

[0013] Driven by a constant current, the LED has high luminous efficiency and long working life; figur...

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PUM

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Abstract

The invention relates to a driving method of an LED circuit, belonging to the field of LED illumination, wherein an AC / DC (Alternating Current / Direct Current) module, LED driving modules and LED strings are comprised. In the method, a constant-voltage power source is supplied to each LED driving module through a power supply bus, and then is converted into a constant current power source by the LED driving module to drive the LED strings; the number of the LEDs in each string is equal; and the impedance characteristics of all the LEDs are basically consistent, and the impedance characteristics of each string of LEDs are basically consistent so as to ensure that each string of LEDs can run in a current-sharing mode and the brightness of each string of LEDs is consistent so that the LEDs cannot generate the obvious brightness difference, therefore, the final goal of control is guaranteed, i.e. the safe and stable running of the LEDs is ensured.

Description

technical field [0001] The invention belongs to the field of LED lighting and relates to an LED driving circuit method. Background technique [0002] LED light source has the advantages of using low-voltage power supply, less energy consumption, strong applicability, high stability, short response time, no pollution to the environment, multi-color light, etc. Although the price is higher than the existing lighting equipment, it is still considered to be able to The most ideal light source to replace the traditional light source. [0003] At present, the power of a single LED in batches with mature technology is below 3W, so in the application of commercial street lamps, a large number of LEDs are required to be combined into a multi-point light source to meet the lighting design requirements of the road. If the traditional street light single light source driving method is used, not only the circuit is complicated, the reliability is poor, but also the manufacturability is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02F21V23/00F21Y101/02
Inventor 牛萍娟高志刚张义明冉亮崔艳君
Owner 高志刚
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