all about led lamp technical: March 2014

LED downlight-Application of Thermal Plastic in LED Downlight / Bulb-Article-Future

More conventional thermally conductive material is a metal and metal oxide, and other non-metallic materials, such as graphite, carbon black, A1N, SiC. With the development of science and technology and the production of many products on the thermal conductivity material put forward higher requirements, want to have more excellent performance, light weight, resistance to chemical corrosion resistance, excellent electrical insulating properties, impact resistance, easy molding, etc. . Thermal insulating polymer composites because of their excellent performance more and more widely used.

However, due to polymer materials, mostly poor conductor of heat, limiting its application in terms of thermal conductivity, and thus the development of new polymer materials with good thermal conductivity, thermal conductivity now become an important development direction of the material. Especially in recent years, with the rapid development of high-power electronics, electrical products, is bound to be more and more problems due to product heat, resulting in lower product efficacy, shorten the service life. Some data indicate that electronic components temperature is increased by 2 ℃, which fell 10 percent reliability; life expectancy is only 25 ℃ 50 ℃ at the time of 1/6.

Thermally conductive filler is mainly divided into two types: one is the thermal insulation filler, such as metal oxides, metal nitrides. The other is a non-thermal insulation fillers, such as carbon-based and various metal. The former is mainly used in electronic components such as packaging materials for electrical insulation performance requirements of the occasion, the latter is mainly used for heat exchangers and other chemical equipment electrical insulation performance requirements for lower occasions.

Currently domestic power LED lamps(LED bulb) commonly used in aluminum industry as a shell cooling materials, the use of thermal plastic housing can save a lot of energy and improve production efficiency, reducing the cost of LED products have a very real economic significance. Can greatly expand the use of plastic lighting engineers to develop products and creative spirit and design more portable, beautiful products for faster promotion to consumers. We propose on the basis of extensive research on the use of thermal plastic production 8 watt and 10-watt LED downlight base through the mold, temperature check whether all parts of the product comply with the requirements to test thermal plastic is qualified for mass production.

Japanese prince holdings announced, they have established the particles precision coating technology also microfabrication technology, and successfully make the doubled brightness of the LED and the organic EL element. The company indicated, sapphire substrate use for LED after process of this technology will on market in 2016. They show the organic EL element and LED on LED Next Stage 2014 in Tokyo Japan.

Recently, many high-efficiency LED is processed using a surface fine concavo-convex sapphire substrate or wavy "PSS (Patterned Sapphire Substrate)". There are a large number of cases indicate that with the PSS that the gallium nitride (GaN) crystal on the substrate more easily reflect light, can improve the light extraction efficiency of the LED, the light emitting efficiency can be increased from 20 to 30%.