Led light dimming method?

Household LED lights can also be dimmed in two ways: one is to adjust the capacitance of the resistor-capacitor current limiting circuit, and the other is to use a thyristor to control the current conduction angle.

Led light dimming method?

1. Design dimming function can reduce the cost for incandescent lamps. With the development of LED lighting products, it is not willing to lose the dimming control application when switching to LED lighting. The dimming methods of LED lamps are mainly and common. There are three types of dimming skills that are dimmed based on changes in the LED drive current input. According to different circuit systems, it can also be divided into analog dimming and PWM dimming.

2. This dimming method is to dim the LED lamp by modulating the LED driving current. Since the brightness of the LED chip and the LED driving current are in a certain ratio, we can control the LED driving current to control the brightness of the LED lamp.

3. This dimming method is called a simulated dimming method or a linear dimming method. The advantage of this dimming method is that when the driving current is linearly increased or decreased, the influence of the driving current overshoot on the lifetime of the LED chip is reduced, and the anti-noise of the dimming circuit is strong. The defect is that the process of changing the magnitude of the driving current definitely has a certain influence on the color temperature of the LED chip.

4. This dimming method is called pulse width modulation (PWM). The method is characterized in that the driving current is square wave-shaped, and the pulse width is variable. After the modulation of the pulse width is converted into a time for modulating the continuous illumination of the LED lamp, the input power is also converted, thereby achieving energy saving and dimming. aims. The frequency is about 200 Hz to 10 kHz as usual. Because of the hysteresis of the human eye, the glint of the light source during the dimming process is not felt. The advantage of this dimming method is that it can improve the heat dissipation performance of the LED. The defect is that the overshoot of the driving current definitely has a certain influence on the life of the LED chip.

The above is for everyone to introduce the LED light dimming, led light dimming method of all knowledge, hope can help everyone.