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.