Dimming method of LED (Light Emitting Diode) streetlamp

A technology for LED street lights and LED lights, applied in the directions of light source, electric light source, electric light circuit layout, etc., can solve the problems of electromagnetic interference ratio, increase modem, complex system structure, etc., and achieve the purification of electromagnetic environment, simple system structure, and reduced system cost effect

Inactive Publication Date: 2013-04-03
SHENZHEN MEGMEET ELECTRICAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The power line carrier communication scheme needs to add a modem, the system structure is complex, and the cost is

Method used

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  • Dimming method of LED (Light Emitting Diode) streetlamp
  • Dimming method of LED (Light Emitting Diode) streetlamp
  • Dimming method of LED (Light Emitting Diode) streetlamp

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Experimental program
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Embodiment Construction

[0020] Such as Figure 4 As shown, the LED street light system includes a lighting control room, AC / DC power supply and 88 LED street light assemblies. The LED street lamp assembly includes an LED constant current power supply module and an LED lamp, and the LED constant current power supply module supplies power to the LED lamp. LED constant current power supply module includes constant current power supply circuit, input voltage detection circuit and control MCU; AC / DC power supply includes control MCU and AC / DC conversion circuit, AC input terminal of AC / DC conversion circuit is connected to mains, and DC output terminal is connected to The input end of the constant current power supply circuit and the output end of the constant current power supply circuit are connected with LED lamps.

[0021] The lighting control room sends a dimming signal to the MCU of the AC / DC power supply, and the MCU of the AC / DC power supply controls the AC / DC conversion circuit of the AC / DC powe...

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PUM

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Abstract

The invention discloses a dimming method of an LED (Light Emitting Diode) streetlamp. A light control room sends a dimming signal to an AC/DC (Alternating Current/Direct Current) power supply which outputs direct voltage currents in different voltages according to the dimming signal to an LED constant current power supply module through a direct current bus. The LED constant current power supply module outputs different currents to the LED lamp using input voltage as the dimming signal, so that the LED streetlamp is dimmed. According to the invention, the dimming signal is transferred through a power bus, and brightness control signal detection can be realized by a simple comparison circuit without an independent control circuit. The system is simple in structure, and the system cost is lowered. Wireless interference and electromagnetic interference are avoided, the electromagnetic environment is purified, and the system reliability is improved.

Description

[technical field] [0001] The invention relates to an LED street lamp, in particular to a dimming method for an LED street lamp. [Background technique] [0002] LED street lamps need to adjust the brightness of street lamps according to the environmental conditions. The traditional LED street lamp system includes a lighting control room, AC / DC power supply and multiple LED street lamp assemblies. The LED street lamp assembly includes an LED constant current power supply module and an LED lamp, and the LED constant current power supply module supplies power to the LED lamp. The LED constant current power supply module includes a constant current power supply circuit and a control MCU. The AC / DC power supply includes a control MCU and an AC / DC conversion circuit. The AC input terminal of the AC / DC conversion circuit is connected to the mains, and the DC output terminal is connected to the constant current power supply circuit. The input terminal and the output terminal of the ...

Claims

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Application Information

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IPC IPC(8): H05B37/02
CPCY02B20/72
Inventor 李卫东方旺林杨福盛陈兴永
Owner SHENZHEN MEGMEET ELECTRICAL CO LTD
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