Dimming method applicable to traditional dimmers and LED dimmable drive power

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...

AI Technical Summary

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 brands; 2) the heat generated is large, and the products produced are unreliable; 3) the dimming effect is not good, and the minimum can only be adjusted to 20%. No matter how low the brightness is, the stroboscopic light will be very serious, or the designer will turn off the LED light before it flickers, which cannot meet the requirements of daily life dimmers

Images