LED lamp packaging technology and heat dissipation technology in recent years, the continuous development of the stability of the LED lamp has reached a good level, the light fades and color drift occurs mainly some cottage manufacturers of products, mainly due to the thermal design unreasonable. Relatively speaking, LED lamp drive power to more serious, leading to a dead lights or flashing the main reason, that is, LED lamp drive power led roadway lighting quality has become a short board, LED lamp driver power bucket theory of life is the life of the LED lights.

Conventional street lighting the lamp power supply separate failure usually occurs lamp high pressure sodium, high pressure sodium national standards year warranty period, sodium lamp, high pressure sodium lamp street light management unit will save the library a certain number of mature national standards, the size, power, etc. The main parameters of the main parts are unified with interchangeability.
LED lights failure in the power supply, so the main is to solve the power problem. Due to the current lack of a mandatory uniform standards LED power supply, the power supply on the market fragmented, single-channel, multi-channel, dimensions vary hard to replace. With the ultra-high-power LED street lamp on the market, the emergence of led roadway lighting tunnel lights, LED driver power failure frequently combined with LED SMPS use of the built-in design, power LED lights often cause maintenance difficulties and the lack of after-sales maintenance services, combined with some manufacturers, So the owners complaining after the media hype caused mass misunderstanding of LED lights, affect the LED industry reputation.
Seven experience led roadway lighting lamp driver power supply
1, to give up more than 4-way output, the output of the development of one-way or two-way give up large current and large current development of small current.
More output way more complex the current interference between different way out to solve the high cost, if not to solve the high failure rate. Further more Outputs, then the total output current is greater, and the current is the main reason for the heat, the voltage itself does not directly lead to fever, simple hair heat with the current proportional to the square, which means that the current increases to the original 2 times, then, the amount of heat will be increased to 4 times the original, the current is increased to the original three times, and the heat will be added to the original 9-fold. In summary, one-way or two-way output LED lights Power failure rate will be much lower.
2, intelligent control is one of the advantages of the LED lamps, power is the key to intelligent control.
The most obvious conditions most mature intelligent control LED lights and LED tunnel lighting applications, intelligent control in different time periods, according to the road traffic density to achieve lighting power stepless control, both to meet the application requirements, and achieve huge energy savings effect, can save a lot of funds for highway competent units. The tunnel lighting can not only energy saving the Crossing brightness can also be adjusted automatically according to the brightness outside the tunnel to the driver to provide a visual transitional phase, in order to ensure the safety of the driving.
3, to give up the high-power, ultra-high-power, choose a higher stability of the small and medium-sized power supply.
Because the greater the power, the greater the heat, more compact components inside, not conducive to heat, and the temperature is the power failure culprit. Furthermore, the small power relatively speaking, the development of a more mature, have the advantage of stability and cost. In fact, many of the high-power power program are not time-tested and proven practice are hastily implemented projects are experimental products, failure endless stream. Contrast medium and small power supply due to the early development of technical solutions to be more mature.

The speed fast of LED products is beyond imagination. The strong force of LED lighting products in government procurement market called the strong comments.

In 2012, for the promotion of LED lighting, which can be said is leaps and bounds year. Looking at the market performance of led roadway lighting products in 2012, it is not difficult to see that LED lighting at the same time look to the state financial subsidies in the promotion of the government procurement market has also undergone a huge change from the previous years. It gradually degenerated into hot selling products, procurement projects a substantial increase in the scale of procurement volume growth, as the “vanguard” of the green procurement.

The strong government force

Reporter recently have a summary and statistic which designated by the Ministry of Finance, government procurement information release media – “China Financial and Economic News”, “China’s Government Procurement News” as well as “The Chinese government procurement network” procurement of LED products released in 2012. The statistics showed that 2012 led roadway lighting products in government procurement market performance enlights a little “fire”, about more than 200 numbers of procurement projects, the procurement scale reached 262 million yuan, compared with previous years, the number and scale of procurement procurement projects achieve substantial growth.

From a content point of view of procurement projects, mainly including LED street lamps, LED indoor lighting, LED night lighting engineering, the wall landscape lights, LED stage lights, tunnel lights, navigation lights, medical film viewer, signs, shadowless operation lamp and luminaire, the main material, repair and maintenance services. The most eye-catching for purchasing is LED street lamp. From the procurement unit, urban construction and management departments, schools, hospitals, sports venues and performance groups, all those are as the procurement protagonist.

About the strong force in the government procurement market for LED lighting products, a lighting industry experts told reporters, as the energy saving and environmentally friendly products, LED lighting in the government procurement market force, which is a strong government procurement of energy-saving and environmental protection policy function, and to further promote the development of green procurement.

Why LED lighting products in government procurement market increasingly favored it? A responsible for the procurement project procurement on behalf of the LED lighting that the following reasons: First of all, levels of government in energy-saving and emission reduction gears feel greater responsibility and pressure. Second, led roadway lighting product promotion is influenced by the concept of consumption, prices, and other factors. Third, with the development of the LED industry, the market and technology matures, prices also declined, but also reduce the difficulty of marketing.

The European Commission is expected in 14% of the EU region the share of consumption of lighting in the world, accounting for 19%. But this proportion rising rapidly in European cities, the lighting of these areas accounted for half of the total electricity consumption, which means that the energy demand of the development of high-efficiency led roadway lighting will have a major impact.

 

 

But in many cities government this awareness is not enough, some awareness of the city is facing other challenges. In the Green Paper, the Commission said: “A lot of cities are reluctant to solid-state lighting is widely used in the field of outdoor lighting, this is mainly because of the relatively high upfront investment costs and a tight annual budget of conflict. There are also some other reasons, such as quality certification system and the lack of specification development standards. ”

 

For residential customers, there are similar difficulties. The European Commission said that sales and production of solid-state lighting will bring a revolution. The Green Paper proposes to provide financial incentives for residential customers to purchase and installation of solid-state lighting, and gas, power and communications, lighting can also be the form of services, rather than simply through the purchase of SSL light bulb. In this way, the led roadway lighting company can take on the cost of installation, and then return on investment from the savings in energy use.

 

The European Commission forecast, lighting and services market to the intelligent lighting systems and services, the changes will have a major impact. A growing number of lighting companies will enter the lighting market, resulting in the lighting industry consolidation. Customized solutions will be the lighting industry is a growth opportunity.

 

Europe Philips and Osram, the two major world’s leading lighting companies and the led roadway lighting manufacturers, solid state lighting development is still relatively slow. The European Commission believes that other countries, especially China, Korea and Japan, the strong support of the government and national strategies to promote the rapid development.

 

The European Commission said that Europe must address the current barriers to the development of solid-state lighting and help the European lighting industry to stay ahead of global competitiveness. The European Commission put forward a number of key strategic issues: the European development of the technology into the ability of the products sold, and to strengthen cooperation in the value chain, as well as the use of intellectual property rights.

 

OFweek semiconductor lighting on February 6, 2012, the European Commission has photoelectric listed as a key enabling technology, the European Commission is making great efforts to promote large-scale expansion of the solid-state lighting in Europe, in order to reduce energy costs, and promote the lighting industry developments.

 

 

led roadway lighting can bring significant benefits, but to become a truly mainstream technology and is also facing many challenges, especially the cost, standardization, and public awareness. The European Commission wants to ensure that the major economies of Europe will not lag behind the other, equally he tried to develop solid-state lighting.

 

McKinsey & Company, a recent report shows that in 2010, the global lighting market size of about 52 billion euros, of which Europe accounted for nearly 30% of the share. 2020, the global lighting market will reach 88 billion euros, and then rising with the share of developing countries, only 25% in Europe.

The European Commission said that Europe must address the current barriers to the development of solid-state lighting and help the European lighting industry to stay ahead of global competitiveness.

 

The European Commission acknowledged that, while the European lighting industry has 150,000 employees, but the led roadway lighting production is very limited. A subsidiary of Philips Lumileds is a major LED streetlight chip manufacturers, but Lumileds in San Jose, California and Asia the production of led roadway lighting. Therefore, a subsidiary of OSRAM Opto Semiconductors to become the leading manufacturer of mass production of led roadway lighting, the only company in Europe.

 

Osram and Philips is the main representative of the European lighting technology and industry influence, but in other countries outside Europe and the company is rapidly advancing the development of LED solid-state lighting, fear of being left behind in Europe. The figure shows the “Mega Zeni, Japanese electronics giant Sharp led roadway lighting modules. The module provides up to 100 lm / W white light efficiency, and is designed for indoor and led roadway lighting applications.

 

 

The Green Paper also emphasized the dependence of the led roadway lighting technology for scarce raw materials, including the led roadway lighting chip emitting layer of indium and gallium, and yttrium, cerium and other rare earth elements used in the phosphor in the led roadway lighting blue light into white light. China has more than 95% of the rare earth supply, and exports were strictly limited.

 

The European Commission put forward a number of key strategic issues: the European development of the technology into the ability of the products sold, and to strengthen cooperation in the value chain, as well as the use of intellectual property rights.

 

The European Commission called on the European lighting industry for the “Horizon 2020” innovative plans to seek public support to launch their own programs to promote cooperation between large enterprises and SMEs, and industry standards developed jointly with the European institutions.

U.S. Department of Energy (DOE), lighting program manager JimBrodrick as the first spokesman made ​​the report entitled the LED roadway lighting industry, state and market forecasts, Jim Brodrick in the report about the shortcomings of the success and limitations of LED roadway lighting solid-state lighting (SSL) technology used in other applications.

 

Brodrick First Department of Energy, concerned about the SSL and LED roadway lighting technology investment, citing the Department of Energy report released earlier this year, Brodrick said, if the seven kinds of traditional lighting applications all replaced by the LED roadway lighting may be annual energy savings 233 megawatt-hours (TWh) of electricity – enough to support the electricity of the nineteen million households.

Brodrick said that the LED used in recessed downlight lighting, outdoor area lighting, the performance of 2×2 feet dark light trough lighting and freezer lighting is perfect, but LED roadway lighting application containing only minor alteration of a light bulb lamps, linear replacement lamps and the performance of the concave circular ceiling lighting is not ideal.

Nevertheless, Brodrick said, or LED roadway lighting lamp light output and cost advantages in some applications applications, such as those hard to reach places for longer life of LED lamps.

In the center of the report of the United States SSL industry, talked about the LED lighting products, he said: “If you start from a blank sheet of paper design and come up with products that are really good.” He also added that good The design must address all aspects of a lamp, including the LED roadway lighting chip, optical, electronic, thermal management and mechanical design.

But. 4 feet of linear LED lamps has been gradually improved, close to the efficiency of fluorescent lamps, directional LED light output and distribution is still not as good as the fluorescent light to diverge into the entire cylindrical.

In terms of color quality, Brodrick said, LED explosion proof manufacturers have made significant improvement, more stringent grading told the lighting manufacturer is of great benefit. The Department of Energy will continue its SSL multi-year work program plan, in order to improve the lumen output and performance targets. Performance, Brodrick said, we are seeking to achieve this goal of cool white and 258 lumens / watt in 2020.

He also said that the LED lamp is a good choice often occurs in the areas of vibration and climate extremes. Another example those containing only a small modification of a light bulb lighting, Brodrick said that the LED used in this technology has been getting better and better, but they are generally smaller than the incandescent light output, light color quality and light distribution.

He also describes the recent tests of the Department of Energy: The Department of Energy has purchased a 33 LED light products of eight large-scale retail stores in the United States for testing, results showed that the majority failed to meet the basic performance parameters, consumers are more satisfied with incandescent or halogen the lighting effect.

Lit LED roadway lighting need to speed up the materials technology R & D

 

As representatives of the next-generation light source, LED roadway lighting has a very good performance, such as brightness, color saturation, and luminous efficiency, high efficacy of LED roadway lighting and lanterns, small size, light weight, solid and long life, low driving voltage, easy to drive, but also fora variety of occasions, such as indoor lighting, road lighting, architectural lighting, display applications, traffic signals, lighting, industrial lighting. LED roadway lighting industry in China after the early stages of development, industrial start of the industry growing at a critical period of development, is also facing many problems and challenges.

 

 

Disorderly competition affect the industry

Response to the “patent war”. 2010 there will be some of the important field of white LED patent expires, other words, LED roadway lighting industry in recent years into a frequent patent litigation battle. According to incomplete statistics, the global LED patent application 124,000, which the United States, 20000 China, 25000, 49000 Japan accounted for. The key is the 25000 LED patent in China, mostly concentrated in the middle and lower reaches of the whole industrial chain, mostly design, utility model patents, invention patent very little. All have some peripheral patent in the upstream industry chain, but the core patents master degree.

Balance productivity growth and market demand. According to incomplete statistics, in 2010 only listed company in the investment in the field of LED roadway lighting over 30 billion yuan, 20 billion yuan of three safety photoelectric BDO Runda 4 billion yuan. LED industry investment in 2010, about 37% to invest in the upstream chip areas, 52% to invest in downstream applications, signs of overcapacity initially appeared. 1 July 2011, China MOCVD equipment increased by more than 200 units, is expected in 2012, China LED roadway lighting chip production capacity is 10 times that of 2010. MOCVD equipment in China more than 500 units, count 96 projects under construction, the total number of over 1600. According to statistics, the sapphire substrate manufacturing enterprises 41, planning a total investment of 44.7 billion yuan, including the planning of projects under construction amounted to 12.08 billion yuan in the projects under construction production capacity of 101 million / year. However, due to the global economic situation is not optimistic, the LED chip demand declining. How to expand the LED general lighting market, and how the government should support the market, how to cultivate, all we need to solve.

To avoid disorderly competition. Before the time of the LED heat led to blind investment led to the most direct result is a vicious competition, blind investment and lead to vicious competition, vicious competition, ignoring product quality, inferior products tarnished reputation. Thus, the disorder of the competition led to a number of business failures, blind investment of SMEs in this winter which may not survive. , How to change a negative impact in terms of the industry in which the industry may take time and cost of slowly digested some impact. Have been difficulties in the LED industry, and gave us added a number of adverse factors?

Development have long-term vision

Response to the shortage of raw materials. High-brightness LED roadway lighting chip is based on indium. In the Earth’s crust content in 61 strategic metal in second place, the development and application of the growing global reserves are not abundant, the price is growing, it is expected there will be periodic shortages. If the LED roadway lighting into the general lighting market, the problems caused by raw materials, abundant, many foreign organizations and enterprises have begun to explore new chip materials, China should also pay attention to this problem, proceed to deal with rising raw material prices that may occur in the future, development of new LED roadway lighting materials.

Focus on new technology development. Such as the LED roadway lighting internal quantum efficiency enhancement, as well as changes in package structure and new phosphor / quantum dots, the transparent substrate, contact materials, reflective materials, the second optical / lighting reflector’s design, and development of high-performance drive power .

OLED challenges can not be ignored. LED roadway lighting and OLED have their own strengths, when the LED streetlight market, but also face the competition of “compatriots” OLED. OLED display technology has been relatively mature, and has entered the market, lighting technology is taken seriously, in the rapid development of. The commercial grade white OLED light efficiency reached 50lm / W general lighting lights more than two times the life expectancy has reached 100,000 hours. And laboratory research and development of white light emitting efficiency of 120lm / W, is close to the U.S. Department of Energy requirements for lighting materials 150lm / W. Of course, OLED flat light source is also facing some problems: poor antioxidant capacity of the OLED light-emitting materials, power, afraid of the water, you need to vacuum glass seal, so need LTPSTFT substrate, OLED applications in the field of large-size the cost will be high; the yield of large-size OLED panels are still not high, a substantial increase in the cost of OLED product line, but also makes the production can not improve quickly; light-emitting material properties, component life by the effects of restrictions of the short board; surface light source specifications and drive power standard is yet to be established.