Brightness of the upper reaches of the LED heat dissipation into a polycrystalline packaging

Led in the stately lighting field gate, makes the brightness of all manufacturers of carp became the object of. After all, the assembly of LED into a light bulb, the total number of lumens output is the LED lamp can meet the lighting needs, and replace the traditional light bulb is the biggest key. However, the high power LED chip, although in a single crystal package can get a higher number of lumens, but in terms of luminous efficiency is far inferior to small power LED chips. It also makes the downstream packaging factory LED sub factions, one faction is designed to go mainstream high-power LED chip packaging plant, and the other is the main small power LED chip package (multi-chippackage) packaging plant.

Application of high power LED single crystal package has been mature in the lighting market, these techniques also show that the application of LED is feasible in lighting, only LED single crystal packaging applications in lighting, prone to glare, uncomfortable color, the technique still needs to break through. There are no better solutions except for two optical methods, such as a photomask or lens. In addition, high power single chip package, the production technology is already quite mature, but the single chip in the high current (>700mA) operation, the chip will produce hot heat density is quite high, which makes this package in the plant package, we must also consider the thermal stress of solid crystal and derivative when welding.

In contrast, under the same total power, small power chips not only have a higher number of lumens, but also because of the heat scattered in the various chips, but not easy to produce hot spots. Therefore, only the performance of light and heat on the performance of small power polycrystalline packaging is the upper hand.

Of course, the relevant manufacturers continue to focus on improving the number of lumens LED lighting. Will be launched in the photoelectric poly packaging high pressure LED products, the main LED bulb market, the best luminous efficiency of the product can reach up to 120 lumens per watt, new products have been shipped in the near future. Wu Jianrong, chairman of LED, said, in addition to the main lighting lighting market, how to effectively reduce product costs, but also the future of the main product development.