Analysis of the advantages, disadvantages and future development of the dimming mode of outdoor floodlights
Anyone who has known externally controlled LED floodlights knows that the general control mode is to use the 512 controller to control the lighting program, but with the development of technology, there are other modes that can be realized. Of course, the 512 control mode is more commonly used. Next, Ruiyi Lighting will show you what other dimming modes?
One method is to realize the dimming of the LED lamp by adjusting the driving current of the LED, because the brightness of the LED chip and the driving current of the LED have a fixed ratio.
Two methods: Dimming is often referred to as analog dimming mode or linear dimming. The advantage of this dimming is that when the driving current increases or decreases linearly, the LED chip will be relatively reduced, and the control circuit has strong immunity to the effect of overshoot of the driving current. The disadvantage is that the change in the driving current will have a certain impact on the color temperature of the LED chip.
A third way of dimming is the Pulse Light Modulator (PWM) mode. This method is to make the driving current square through a certain control, and the pulse width can be changed. Through the adjustment of the pulse width, the duration can be changed, and the output power can also be changed at the same time, so as to achieve the purpose of energy saving. The frequency conversion speed regulation is generally between 200Hz and 10kHz. Due to the reservation of human eyes, people cannot feel the process of light flickering moving. The advantage of this approach is that moving the light has the advantage of improving the heat dissipation of the LED. The disadvantage is that the overshoot of the drive current has a certain effect on the life of the LED chip.
The above three dimmer methods are classified according to the output control of the drive current of the LED. The control circuit can also be divided into analog control and PWM control, the control circuit is usually completed by a microcontroller.
In the field of road lighting, the application of LEDs is spreading rapidly, and long life and reliability are still the key things to be considered, but with the development of technology, when the problems of life and reliability are solved, to a certain extent, LED lighting applications Programs will inevitably move towards the pace of intelligent dimming systems. The perfect intelligent control of LED flood light should have manual control, intelligent control, light control, time control and fault alarm functions. When the sun goes down, the sky can be automatically turned on, and the lights at 12:00 midnight can be automatically halved; after dawn, the light can be automatically turned off; in special cases, people can manually control; when the control fails, the control system can automatically Call the police.
Benwei Lighting is an LED flood light manufacturer with 12 years of experience. If you want to purchase a high-quality LED flood light or have a more in-depth understanding of the application of LED flood lights, please contact us directly at wendy@benweilighting.com
