The basic structure of LED lamp is led, which can work as long as it meets certain voltage. However, the brightness of LED lamps is determined by the driving current. And we usually say that dimming is to change the brightness of the lamp by adjusting the current supplied to the LED. This is also the question that I want to talk about today: why do I need dimming when I use LED floodlights?
LED driver power built-in timing program, when the power is on, according to the set instructions to carry out dimming, such a program setting cost is low, without debugging. But once the timing program is set, it is difficult to change and inflexible. In the night when the traffic volume and the traffic volume are less, the floodlights used for road lighting should be dimmed to realize secondary energy saving and reduce energy consumption.
For tunnel lighting, according to the light conditions outside the tunnel, adjust the brightness of the light in the tunnel to ensure that the brightness and color difference inside and outside the tunnel are not big, so that the driver can quickly adapt to these two environments. Landscape lighting lamps, such as wall washing lamp, line lamp, projection lamp, etc., use DMX512 control system to control DMX512 chip, adjust the working current of lamp beads to adjust the light.
Mainly used in landscape lighting. Although the dimming principle seems complicated, we can simply summarize the DMX512 system in three parts: DMX controller - DMX decoder - landscape lighting. The above is why the LED projection light needs dimming, how to dimming and the introduction of dimming principle.