LED industry important technical specifications need to be improved

In coping with the global trend of environmental protection, the rise of the LED lighting industry, a large number of technology companies in this emerging industry, but because the LED lighting performance standards for real-time, trust failed to properly regulate, resulting in a large number of products can not pass the test, the main reason is the serious decline ended, no design theory research to examine the pillar, which caused the owner's doubts therefore, the industrial development time delay. LED lighting solutions provider Xinyuan Sheng Technology (Thermoking), provides a variety of high-performance LED street lamp components to the lighting system of the important technical specifications of the data for the industry reference.

In a pointer to the key technology of LED chip and package component luminous efficiency, xinyuansheng technology, LED chip and package the key technologies, the United States and Japan manufacturers have production breakthrough luminous efficiency more than 100~120lm/W, beyond the traditional HID light sources for maximum efficiency (luminous efficiency 90~110lm/W), to solve the shortage of all lamp illumination is greater than or equal to 45lm/W. Meet the road lighting decline long life low compliance with international standards of average illumination, 25~40Lux specifications and 30~50% requirements of energy saving. The LED luminous efficiency, temperature rise and life pointer key technical specifications section, view CREE or OSRAM LED in the published data, the working temperature of Tj chip PN junction is less than 85 Deg. C, to ensure the service life of up to 50 thousand hours, and the chip itself to PN junction (Tjs) heat plate temperature is between Delta T = 6~15 C, another LED light efficiency and working temperature is inversely proportional to the performance characteristics of each, a rise of 10 degrees Celsius, will lead to serious consequences by light 5~8% and life concept, far from the general publicity LED can work in more than 100 DEG C life up to 100 thousand hours.

The LED street lamp system heat transfer heat environment temperature key pointer part, xinyuansheng technology pointed out that such working temperature of lighting system shall not be higher than 85-10=75 DEG C; LED road lighting lamp demonstration provisions / specification, durability test environment temperature is 60 DEG C, so the heat lamp system temperature rise must be less than or equal to 15 DEG C T.

The company 150W LED street as an example, the test of low delta T = 12~15 C + heat transfer temperature and cooling system, calculation of the thermal resistance of Tr=0.08~0.1 DEG /W, and the general design of the system for testing the temperature rise of delta T = 30~40 C Tr=0.2~0.26 C /W to calculate the resistance value, life will be shortened to 2 times and more than 15% light. In addition to 350W LED lamp test, the temperature rise of the cooling system can still reach T = 15, thermal resistance value Tr = /W.

In the part of cooling technology LED lighting system, xinyuansheng science and technology, electronic equipment, cooling heat transfer method is suitable for low power low order natural cooling method at present, such as MR16/PAR30 by 1~70W products, has reached 30~40 degrees Celsius temperature rise. If more than 100~250W still use natural heat dissipation method, as most of the products on the market, we must use a large amount of aluminum alloy material to increase the heat transfer and heat exchange area, volume weight 15~30Kg.

Low order natural cooling law of metal materials used in the more large area to reduce the temperature, the better, but only Aluminum Alloy material cost increase of $30~70; but if the switch to high reliability industrial air conditioner air conditioning, computer CPU high order power products using active forced cooling method, small fan life is the basis of the high efficiency, to ensure 50 thousand hours, and has IP65 waterproof and dustproof, after testing, can be as low as T = 12~15 C L lamp system temperature, compared with the natural cooling method of reducing temperature up to 20 degrees Celsius, life will increase 2 times and increase the brightness of light efficiency more than 15%.

In addition, the general design of LCE lighting products are not taken into account the dust protection system, it is necessary to completely prevent dust storms, gravity dust accumulation in the heat dissipation structure, in order to avoid the problem of overheating caused by LED burn. If the heat dissipation structure toward the day surface lead to dust accumulation, heat accumulation can not diverge, may cause the LED decay and burning condition. Xinyuan Sheng science and technology, said that to solve the above problems, the design of the cooling structure can be applied to the ground.

Other salt fog test and so on, the existing products by the outdoor test time of 15000 hours after light < 10%, in good condition. The main road lighting optical design can also meet the world standard, that is, the 10 meter high lamp must be illuminated on average to the banner of the length of 40 meters of the road, to solve the difficulty of optical lens design, to achieve the requirements of high aspect ratio 1:4. In addition to the core technology module has reached the wick lighter, without relying on shell as the radiating body, so the light body design can be arbitrary shape changes, the city reached a beautiful feature.

Source: Xinyuan Sheng Polytron Technologies Inc