1 Introduction
The LED lighting market opportunities for the industry to bring endless imagination, and LED lighting applications, jump from the past Outdoor LED indoor lighting applications. According to Strategies Unlimited, statistics, LED interior lighting within five years there will be a trend of exponential growth. According to the estimates, to 2011, its output value will reach tens of billions of dollars. Especially in 2009, the EU took the lead to ban incandescent plan, as well as energy-saving issues of concern, creating a huge market opportunity LED interior lighting and an optimistic outlook. Below to analyze the development of high power LED indoor lighting cooling technology, optical design and drive design, lighting technology needs.
Development of high power LED lighting in the development of high power LED lighting depends on two elements: First, the chip itself; lighting technology, including thermal, optical drive.
2 chip support
At present, the LED chip technology, the key to development lies in the base material and epitaxial growth techniques. Base material by the traditional materials of sapphire, silicon and silicon carbide, the development of zinc oxide, gallium nitride and other materials. High-power chips for accent lighting and the overall lighting, or for decorative lighting and some simple auxiliary lighting, low-power chips, the key technology upgrades are related to how to develop a more efficient, more stable chip. In a few short years, by means of a series of technical improvements, including chip architecture, surface roughening treatment and multiple quantum well structure design, including LED light effects achieved a great breakthrough. Figure 1 is a schematic diagram of the LED chip structure. With mature production technology, the LED quantum efficiency will further improve the luminous efficiency of LED chips will increase as well.
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