Three advice to solve the LED street lights effectively

LED's junction temperature is quite high, continued to work in the street for a long time, if not effective cooling cooling module, it will affect the performance of LED life and luminous, like the current LED lights light failure is a serious cause of these factors. LED lights are used outdoors, environment and climate disturbance factors, so most of the manufacturers of LED lights radiator shell is anodized to protect or increase spray paint to prevent corrosion acid substances. Anodized life is not long, slightly longer time will still oxidation discoloration, if you want to remove the heavy, not only time-consuming and labor will increase maintenance costs; low cost paint protection, protective efficacy of good, but in general there is no heat paint function, the paint itself will form a barrier effect, such as LED lights then increase the heat sink thermal resistance, not only did not help, but because of the heat energy blockade in the radiator, so that LED light power is reduced, and finally lead to serious bad effectively.

One suggestion: start from the basic materials

To solve these existing problems, we recommended to proceed from a street vendor on basic materials, from the inside out from the fundamental solution to the problem of high power LED source. For example, when the light emitting component and the aluminum plate bonding, thermal plastic would play a key role, and some vendors that the thermal conductivity of the thermal conductivity or thermal pads better film thickness to be thicker the better, no one wanted to thermal problems. Better thermal conductivity, thickness encountered resistance is useless. Moreover thermal film or thermal pads soft and not really close contact with the substrate, the bonding surface in fact, there are many pores. These pores under an electron microscope to watch, like empty air pockets, which is another form of thermal mass. Under so much the existence of interference resistance of heat conduction, heat the thermal efficiency of virtually been reduced.

Recommendation II: The pair of conductive adhesive

Use for thermal plastic, ceramic thermal plastic soft recommended. Soft ceramic thermal plastic screen printing is different from the traditional construction conformable thermal film, soft ceramic thermal plastic is soft semi-liquid, the network printer blade coating on the aluminum plate, the thermal conductivity of the particles will penetrate the pores of the substrate surface and I filled to the full. This will form a completely flat plane no pores will completely seal is sticking with the LED epitaxial carrier board. Thus put to minimize thermal resistance, heat can be conducted away quickly, naturally reduces the ambient temperature of the LED die, but also extend the life of epitaxial and significantly delay the occurrence of bad light. Furthermore, since the thermal conductivity of soft ceramic paint screen printing malleable construction in high-temperature baking or reflow, it will change with the expansion and contraction of aluminum plate together, stress is very small and will not cause warped aluminum plate, but do not will burst board.

Recommendation III: soft ceramic heat paint

In the external protection LED lamps LED lamps recommended soft ceramic heat paint. This spray-on soft ceramic heat paint can be sprayed directly on the LED lamps outside, the construction is simple to operate, can be adapted to a variety of shapes radiating structure, can also be adjusted into different colors, in response to the needs of landscape design. Soft cooling spray paint ceramic particles inside, is the result of nano-processing, fine particle gun is not only easy to operate, but also to the same thermal particles coated area on the many and dense, so that the temperature of the volatile scattered through the area is also larger, LED lamps allow heat conduction out quickly. Soft ceramic heat paint are thermosetting materials, RoHS environmental safety norms, the construction program is simple and without any special equipment, after baking hot solid and can withstand high temperatures for a long time there will be no qualitative change LED problem. In outdoor use LED lights, landscape lights, or LED advertising billboards, also will face the wind and rain, bird droppings, acid rain, airborne dust, smoke emission, etc. hELlip acid damage. Therefore, this type of soft ceramic heat spray paint must have the characteristics of anti-acid, anti-acid value of the current range of PH3 ~ 11, can effectively protect the LED outdoor lighting appearance will not be eroded.

LED lamps cost structure with packaging technology, carrier board design, sophisticated cooling module structure development, continuous quality improvement, cost as technology development and market demand decline. However, investment in improved material manufacturers are not many, mainly the course with Taiwan Business Development and habits related. Taiwanese manufacturers longer process and design, research and development on the basis of the material dwell less. So in solving technical problems or reduce the cost and other issues, in favor of thinking or purchase health management thinking. But the US and Japanese manufacturers in the first point in time, it will go up thinking from Applied Materials, from the perspective of innovation to reduce costs, improve quality and increase profits.