Swing to describe China LED lighting industry a bit too much, but it is undeniable that China LED lighting is industrial heat, market cold. Why can appear such embarrassing? Because, this is, at the present technologies of high power LED lighting compared with existing efficient light source and no obvious energy saving, and initial investment cost is much higher. Large current efficiency at the same time also in the ascent of into heat energy, if cooling processes is not good and makes LED life drastically reduce the cost and increase, with radiator and volume, make LED light source advantage disappear. Say so, everything is can not reach the lighting market requirements LED technology provoked evil.


Leds luminous efficiency is divided into inner and external quantum efficiencies for quantum efficiencies in basic 80% to 90%, even outside quantum efficiencies unable to emit photons, be effective absorption produce as heat cause LED temperature is high, and reduce the knots in quantum effects, this should be LED the whole luminous efficiency only $traditional lighting general level of the reason. Therefore, to find the comparing equilibrium is to realize scientific luminous efficiency in an effective way. And LED to promote the efficiency of will bring through direct reduction LED a decline in the cost of particles.


Currently most white LED application are by 60 mw below straight insert small tube, because the encapsulation technology can bring serious heat dissipation problems, so only suitable for indicator application domain. Now 3528 patch encapsulation occupy LED lamp main position, but its more than 70 percent of the costs are used in aluminum radiator shell of the cost and processing, make patch encapsulates the high cost hindering the LED illumination popularization.


At present, the LED encapsulation cost fifty percent, want to reduce LED overall cost, we must choose the more suitable package structure, so change existing encapsulation structure and realizing reasonable packaging costs, will be LED lighting is market to accept the most effective and most direct route. Of course, LED chips with technology, shipments increase, USES the larger size wafer production process, is also in constant cost reduction, each year in recent years to speed of 20% lower, if we can make the current packaging costs from 50% of total cost reduced to 20% ~ 30%, LED lighting applications meeting to a new orders of magnitude market scale.


At present, the LED chip accounted for about the whole lamps and lanterns cost approximately 15%, but now I can really than traditional source of energy saving LED chips is numbered. And thermal design, constant-current power source design, overall control technology, and also LED lighting gained popularity application before necessary technical problems to solve. At present, cooling and reliability is LED lighting product life cycle restriction factor, is to design a cooling and heat loss device path LED chips as short, 2 it is to want to have enough heat path to reduce heat resistance.


LED lighting technology toward, the mainstream illuminant should be adopted CoB (chip cluster generator attempts on board) encapsulates the special white LED module, press the lamps and lanterns of Co B optical requirement, also can reduce package secondary optical design cost. CoB encapsulation LED module on the motherboard install more MEDALS, use LED chips more chip can not only improve bright, but also contributes to the realization of scientific and reasonable configuration LED chips, reduce the single LED chips input electric flow to ensure high efficiency.


Distributed constant current technology and continuously optimizing "LED constant-current source" driver solution, sustainable ascension LED module efficiency. Meanwhile, miniaturization of switching power supply, continuously optimize cooling design, as well as improving LED module seal increase the cooling capacity. All this is LED lighting market grew up the necessary technical conditions, ironically, the power supply is currently LED lighting weakest link, the serious influence to the LED lamps and lanterns levels of quality, but many domestic enterprise product quality also really necessary to improve.


Let drop in cost, mature technology is whole industry chain. LED industry chain, middle and downstream respectively denotation materials and chip processing, product component and module package, display and lighting applications. LED denotation pieces and chip accounted for about 70 percent of the profits, industry LED encapsulation accounts for approximately 10% ~ 20%, LED application accounts for approximately 10% ~ 20%. Statistics show that China semiconductor lighting production enterprise over 3,000, 70 percent of them concentrate on industrial downstream, domestic LED denotation materials, chip to technlogy, more than 80% of the power type LED chips, devices dependence on imports.


In recent years, the government Isaac peppery face way to built several LED lighting industry base, but China LED industry is still in 70% of americans heat for the LED by 10% ~ 20% profit share is cost. This means that control LED core technology of foreign companies if not anxious to pull low cost, LED the Chinese LED gathers LED downstream industry only at the expense of their own profits to realize low and let the market hot rise, but no technical support of downstream products, even if the price is cheaper, and how many people dare to use?


In addition, LED lighting development resistance except its own technology, specifications, heat dissipation and price factors such as the outside, CFL energy-saving lamp, fluorescent lamps technology also in development, office lighting system in T5 tubes luminous efficiency has reached 100 lm/W level, CFL energy-saving lamp also have 3W specifications of small-sized product appearance, from the current LED and energy-saving lamps price is concerned, the popularity of LED lighting there is a long way to go.


Because of the downstream encapsulation and application for the funds required and technical requirements comparatively low, at present domestic 80% LED only low-end encapsulation business enterprise, And LED chips and denotation slice, upstream industry due to technology and capital requirement is taller, accordingly sortie enterprise less, develop relatively slowly. Because of the whole production line equipment purchase cost LED nearly 2/3, this also is LED products failing to reduce main reasons. 2010 January 8, domestic first stage independently developed by MOCVD equipment in guangdong zhao letter semiconductor equipment manufacture Co., LTD, mintz in through the next four months after will enter data test equipment volume production stage.