What is the pre-cut phase modulation
LED light-emitting principle with traditional lighting, is to rely on p-n junction, with the power of the LED light source, because of its using different chip, current voltage parameter is different, so the internal structure and circuit wiring distribution is different also, LED to the switch manufacturer of light source light also have different requirements, so the control system and light electrical mismatch has become the common fault of the industry, also for the diversification of LED control system are also put forward higher challenge. If the control system does not match the lighting equipment, it may cause the lights to go out or shine, and may cause damage to LED drivers and light sources. There are five types of LED lighting control in the market
Frontier dimming equipment has a high controlling accuracy, high efficiency, small volume, light weight, easy to remote operation advantages, such as dominant in the market, most of the manufacturers of products is this type of dimmer. The forward phase control dimmer is generally used as a switch device, so it is also called a thyristor dimmer
Dimming 】 before cutting phase is also known as frontier that move light, is to use silicon controlled rectifier circuit, since communication phase 0, the input voltage chopper, until the thyristor turn-on, the input voltage. The principle is to adjust the waveform of each half wave of alternating current, to change the effective value of alternating current, to realize the purpose of adjusting the light.
