What is the concept of LED dimmers? What principles do you use to achieve the dimming?
LED dimmer is the name of the LED constant current drive power supply that changes the output current to the input voltage. Power supply IC input voltage change is detected, so as to adjust its internal duty ratio of PWM signal, the output current changes over input voltage, the brightness of the LED lights changed also.
You said L line dimmers, should be silicon controlled voltage regulator, through external knob to change the internal conduction Angle of silicon controlled rectifier cause changes in the output voltage of the voltage regulator, it changed back to the input voltage of the LED dimmer, through the LED dimmer function to change the brightness of the LED.
LED lighting the best way of dimming, also is the only way, is the way of PWM (pulse width modulation) that move light, PWM popular explanation is to adjust the LED switch frequency, is the LED brightness change, we see it only on and off of the state, the open and close is different from our normal for the light switch, is very intense, could switch for thousands of times per second, the frequency of the open and close, our eyes see brightness is different.
