LED driving power is a kind of power converter which transmits power supply for specific voltage and current to drive LED to give out light. The common case is: the input of LED driving power includes high pressure power frequency alternating current (the same with electric supply), low pressure direct current, high pressure direct current, and low pressure high frequency alternating current (such as the output of electric transformer) and so on. The output of LED driving power is the constant mostly can be changed voltage along with the decline of LED forward direction voltage.
LED light has been the global trend from the perspective of the whole world. The countries in the world made relative supporting policies for LED lighting one after one and actively motivate the development of LED lighting industry. As it is concerned, in developed areas like Europe, America, Japan and South Korea, LED light is almost popularized. Domestically, the output value of LED application products was over 45 billion yuan such as LED demonstration street light, solar power LED, LED full color displayer and components, landscape lighting, consuming electronic backlight and so on in 2008. 2009-2012 was the flourishing period for LED industry. Our country not only grew dramatically in investment, but also made breakthrough in technology to some degree, especially the high power LED driving power boosts at an amazing pace activated by the need of LED street light.