LED street lamp technology - — Solar street lamps brand advantage analysis

This article only from influence; Led street lamp life and quality of the key light distribution, power and cooling three aspects to carry on the simple analysis. A, with light led lighting now commonly used with single chip 1 W high power white led array and high-power integrated encapsulation LangZhong light source module. The optimal

this article only affected by the; The brief analysis of the led street light the most important aspect of life and quality - — With light, electricity and heat. 我。 Distribution of light now, usually with a single 1 W high power led lighting chip array and high-power integrated packaging white light-emitting diode (led) module LangZhong used together. Measure its advantages and disadvantages of main parameters including: average surface brightness; The total intensity of illumination uniformity and vertical illuminance uniformity; Environment ratio; Glare control, etc. In order to achieve the above goals, it is necessary to get rectangle of light distribution in pavement. In order to achieve the above goals, mainly through the proper optical design for the led street light intensity distribution of bat airfoil. At present, 'peanuts' type secondary optical lens can achieve better effect. At present, the high-power integrated encapsulation light module of light due to its light emitting area is large, in the light distribution design need to be further strengthened. Second, the power Led drive power is the key to the Led street lamp components, is also the bottleneck of factors affecting the service life of Led street light effect and. Especially the service life of the drive power and the service life of the light emitting diode matching problem. Because the led street lamp with electrolytic capacitor switching power supply must be used in filtering only 8000 hours of life, is far less than in the urban traffic signal lamp led 10000 hours of the theory of life. In addition, the temperature rise every 10 ℃, the service life of electrolytic capacitor will be cut in half. LED street lamp life of one of the most important factor is the drive power supply reliability design. For high power led street light, the main drive mode for constant current drive power supply. In general, they are divided into isolated and not isolated. The former has an advantage on cost and efficiency. However, due to the power supply of isolation, and instability, especially at night or thunderstorm at the exit of high pressure surge, led light source and power supply is easy to damage. The efficiency is low, circuit complexity is higher, but its reliability is assured. Three, thermal optimization of cooling and thermal management control system is the key how to improve the ability of LED street lights, heat dissipation is the core issue of LED encapsulation and LED street lamp design. Leds lamps heat dissipation problem into chip p-n junction to the epitaxial layer. Epitaxial layer, packaging substrate; The three levels of packaging substrate to external environment. The three links constitute the heat conduction channel. For light emitting diode chip, if not effective heat, the temperature of the chip will rise, lead to uneven distribution of thermal stress, chip light-emitting efficiency and phosphor efficiency decline. Chip cooling emphasis is on getting the structure of the led chip design, chip packaging and substrate material selection, followed by the thermal design of led street lamp structure.