Led street light palys a crucial part in the market of lighting

Time:2014/8/18  keywords:LED Street Light

      Currently dimming used primarily driven by power  LED Street Light   to carry, but the direct use of the power and life of the chip dimming have no small impact, to understand under the following LED Lighting dimming technology and future direction: 

   1, by adjusting the LED drive current to achieve dimming LED Lights, because the brightness of the LED chip and LED drive current into a fixed proportional relationship. However, this method would greatly damage led street light chip optical efficiency and lifetime.

   2, the drive current plus analog dimming mode or linear dimming. When the driving current is linearly increased or decreased, the relative reduction in the overshoot of the drive current on the LED chip, the control circuit is strong interference.

   3, the drive current is applied to a pulse modulation (PWM) mode. This kind of approach is controlled by a certain drive current was square wavy, its pulse width variable, LED lit continuously changed by adjusting the time pulse width, and also change the output power, so as to achieve energy-saving purposes. Frequency control in general 200Hz ~ 10KHz, due to the retention of the human eye vision, flashing light will not feel occurring in the dimming process.   Currently in the field of road lighting, led street light is rapidly spreading, light effects, real life, and the price is still a factor in the current user key consideration, but with the development of technology, when these important issues are solved, the user in the smart and humane aspects necessarily have higher requirements, dimming led While current technology and investment will not be much, but it will become increasingly important in the increasing popularity of LED lighting process.


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