Dimming method applicable to traditional dimmers and LED dimmable drive power

A dimmer, traditional technology, applied in the direction of light source, electric light source, electrical components, etc., can solve the problems of poor versatility of dimmer, poor dimming effect, large heat generation, etc., and achieve no mercury pollution and ultraviolet pollution. , Good dimming effect, soft light color effect

Inactive Publication Date: 2010-02-10
GUANGZHOU BODI LIGHTING & ELECTRICAL MFG CO LTD
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  • Abstract
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Problems solved by technology

[0004] In recent years, some designers have experimented with LED dimming technology using silicon controlled rectifiers (silicon controlled silicon dimmers are a type of cutting-edge phase modulation), but these experiments have certain problems, for example, 1) For Traditional dimmers have poor versatility and can only rely on dimmers of individual br...

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  • Dimming method applicable to traditional dimmers and LED dimmable drive power
  • Dimming method applicable to traditional dimmers and LED dimmable drive power

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Embodiment Construction

[0017] A preferred embodiment of the present invention is: as figure 1 , figure 2 As shown, the voltage of the mains after phase-cutting by the traditional dimmer is added to both ends of the input of the LED dimmable power supply, and a small part passes through the R1-5 dummy load to form a loop to continue the conduction of the thyristor. The other part becomes pulsating DC after being rectified by D1-D4, and a small part of it is transformed into a PWM signal according to the phase cut by R6 and ZD1. This signal becomes a DC signal after being filtered by RC, and then amplified. Control the change of the sampling resistance of the constant current, the value of the sampling resistance is fed back to the switching power converter to determine the value of the constant current on the LED, and finally the phase can be used to control the value of the constant current on the LED, so as to realize the use of The phase of the conduction angle of the traditional dimmer controls...

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Abstract

The invention relates to a dimming method applicable to traditional dimmers and an LED dimmable drive power. The method comprises the following steps: converting PWM signals determined by the phase ofthe angle of flow into DC signals through a phase test circuit after being filtered by a RC circuit, and magnifying the signals to control the changes of the resistance value of a constant-current sampling resistor so as to regulate the magnitude of the LED current. The invention can regulate the brightness of an LED bulb by the traditional dimmer, so that people can conveniently change the traditional incandescent bulb lamp into the LED bulb lamp with the ideal stepless dimming function. The LED has the characteristics of long service life, no mercury pollution or ultraviolet pollution, highlight efficiency, shock resistance, energy saving and the like, and belongs to a new generation of green light sources. Therefore, the invention has the advantages of favorable dimming effect (1-100%of continuous stepless dimming), soft light color, environmental protection and energy saving.

Description

Technical field: [0001] The invention relates to a dimming method suitable for a traditional dimmer and an LED dimming driving power supply thereof. Background technique: [0002] Traditional dimmers adjust the brightness of traditional tungsten filament bulbs by adjusting the phase of the conduction angle at the leading edge and the phase of the conduction angle at the trailing edge. The principle of the frontier dimmer is that on the input voltage sine wave of each half cycle, the front part is not allowed to conduct, thereby reducing the average value of the supply voltage to control the power of the lamp, which also controls the brightness of the lamp . The principle of the trailing edge dimmer is that on the input voltage sine wave of each half cycle, the latter part is not allowed to conduct, thereby reducing the average value of the supply voltage, which can also control the power of the lamp, that is, control The brightness of the lamp. [0003] LED light source i...

Claims

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Application Information

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IPC IPC(8): H05B37/02H05B41/282
Inventor 冯锐
Owner GUANGZHOU BODI LIGHTING & ELECTRICAL MFG CO LTD
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