月份：2012年7月

The analysis application of led in China

LED electronic display will be the main part in application of LED lights market, and full-color display robust growth.

China LED electronic display started earlier, with a large number of strong manufacturers appearing in the market. At present, LED display are widely used in banks, securities, hospitals. On the demand of the LED , display ranked second after the LED indicator.

The analysis application of led in China

Led has been applied in the mobile phoned-based small –size LCD panel back-light market. The rapid development of the back-light market attributed to the continuous growth of mobile phone production. Particularly, in 2003, color mobile phones promote the rapid development of the white LED down lights market.

LED automotive application of led , in 2005, the scale of China LED automotive application market is 0.29 million RMB, including automotive lamp market of 0.21 million RMB. From the entire application of LED to see, automotive application market is still in infancy, and the size is very small LED as the car headlights mainly benefit from its lower power consumption, long life and the speed.

Indoor decorative lights market is LED emerging markets. By current control, the LED can be hundreds or even thousands of color change. In this stage that  pay much attention to the personalization, LED color diversification is better for the LED light market development. LED have begun to be made into small decorative lamps, decorative walls used in the hotel room. In 2005, the interior decorative lights market scale will reach 158 million yuan.

LED panel is also widely used in the landscape lighting market which is rapid development of market growth peaked in 2007. The landscape light market is mainly decorative lighting of streets, squares and public places and the driving force mainly comes from the government. By the 2008 Beijing Olympic Games and 2010 Shanghai World Expo,Beijing,Shanghai, held to accelerate the pace of landscape lighting, LED low power consumption in the enormous power of the landscape lighting market with strong market competitiveness. Currently, LED has been increasingly applied to the landscape lighting market. Chinese landscape lighting market size of over 700 million yuan in 2005, driven by these two main activities, the landscape lighting market will achieve a high growth rate of 72% in 2007.

The first chapter: LED indoor and outdoor lighting application problems analysis

LED lights as a new type of lighting source, is at a stage of rapid development, and has been increasing in indoor and led outdoor lights applications.In particular in areas such as commercial lighting, public buildings in recent years, become a breakthrough LED a large number of applications.LED green energy-saving involves not only LED technology and products, but also with architectural design, lighting design, application, and so are closely related.Street lighting management agencies, architectural, lighting designer on the selection and application of light results in these areas, will play a very significant role and the future according to the characteristics of the LED to design innovative lamps or innovative forms of lighting, so has the need for LED practitioners and architectural, electrical, lighting engineer collaboration. To built LED enterprise and designers development, and application, and communication of effective platform, National Semiconductor lighting engineering research and development and the industry Union has in national range within held has more field Salon tour discussion, main through interactive, and discussion of forms, let LED enterprise and design, and application of expert together full discussion LED high bay in design in the of innovation design and application challenges, also for Government carried out semiconductor lighting products model engineering, and build low carbon city, provides new thought and new recommendations.

The first chapter: LED indoor and outdoor lighting application problems analysis

On June 30, hosted by the National Semiconductor lighting engineering research and development and Industrial Union, Sichuan Jiuzhou optoelectronic Technology Co Ltd in association with the theme “LED down lights analysis of indoor and led outdoor lights application problems”–“light the world” semiconductor lighting theme Salon (Mianyang station) in the Innovation Park, Mianyang, Sichuan Jiuzhou industry Park successfully held academic report Hall.General Deputy Chief Bing Shukui of architectural design and Research Institute, China Academy of building research Vice President of the Institute for building environment and energy conservation Zhao Jianping, Chief Engineer of the East China architectural design Research Institute of Adviser Li Guobin, China illuminating engineering society-General Dou Linping, Director of the Tianjin Institute of lighting Wang Lixiong, architectural design Research Institute of Tsinghua University electrical engineer Hua Xu Wang Youjiang, Associate Professor, Shanghai Tongji urban planning, design and Research Institute, National Semiconductor lighting engineering Union Advisory Wang Binqiu, Vice Minister of the Ministry of research and industry, Mianyang City Commissioner of lighting during the well-known experts and scholars, such as application designers, production units, representatives of the units, a total of more than 60 people participated in the large Salon activities.

The second chapter: LED indoor and outdoor lighting application problems analysis

As national LED model city, Mianyang 2011 for has six County two area a city of lighting engineering transformation, regardless of is “green lighting” of scenic engineering, also is Government Office and the municipal public places, and commercial places, indoor lighting, or is heavy disaster area village, and new town, and new County reconstruction of public lighting, are comprehensive used has smart type LED street lamps, and LED indoor lighting, and landscape lit of, new LED products.The lanterns are nine Chau industrial zone, Mianyang, beautiful, gorgeous, light LED lamp map looks gorgeous and beautiful, not only known as “the Silicon Valley in the West,” said show the worst-hit areas of Mianyang to rebuild a new look after more this “light the world” semiconductor lighting topics held Sharon adding more highlights and wonderful. The afternoon in the Salon is divided into two half, respectively, by the General Deputy Chief Bing Shukui of architectural design and Research Institute, China Academy of building Research Institute for building environment and energy conservation Zhao Jianping, deputy chairmanship of two experts, National Semiconductor lighting engineering research and development and industrial League Deputy Secretary General Yang Lanfang welcoming.

The second chapter: LED indoor and outdoor lighting application problems analysis

During the salon, participants on the current problems in indoor and outdoor lighting, the LED and demand;Demand for indoor and outdoor lighting LED lighting system solutions;Urgently to address the important core technology;LED indoor and outdoor lighting products application issues such as standard-setting opening remarks from their respective perspectives, on issues related to the development of LED lighting industry presented their views and proposals to fully absorb, consolidate the domestic counterparts, the lessons learned and deficiencies, address current issues, actively seeking consensus, in order to promote the healthy and orderly development of the LED industry providing help. 　As national LED model city, Mianyang 2011 for has six County two area a city of lighting engineering transformation, regardless of is “green lighting” of scenic engineering, also is Government Office and the municipal public places, and commercial places, indoor lighting, or is heavy disaster area village, and new town, and new County reconstruction of public lighting, are comprehensive used has smart type LED street lamps, and LED indoor lighting, and landscape lit of, new LED products.The lanterns are nine Chau industrial zone, Mianyang, beautiful, gorgeous, light LED lamp map looks gorgeous and beautiful, not only known as “the Silicon Valley in the West,” said show the worst-hit areas of Mianyang to rebuild a new look after more this “light the world” semiconductor lighting topics held Sharon adding more highlights and wonderful.

Solution for LED lamp design failure

PPTC overcurrent protection and thermal protection in the LED lighting
Although many high-end LED lights driver components are gradually integrated over-current, over temperature protection function, but on many occasions, especially overheating protection, we still need discrete components of the program as a collaborative protection program, so that the lamps have a higher reliable and longer life.

Solution for LED lamp design failure

The PPTC refers to the polymer positive temperature thermistor, which is of the polymer and conductive particles. After special processing, the conductive particles in the polymer chain conductive path. When the normal operating cuurrent through(or components in a normal ambient temperature), PPTC was the low resistance state; abnormal over-current through the large current(or environmental temperature (or ambient temperature), when the circuit). heat polymer rapid expansion cut off the conductive particles form a conductive path, PPTC was a high impedance state; over-current circuit (over-temperature condition) is removed, the polymer cooling. The volume is back to normal again, in which conductive particles constitute a conductive path, PPTC showing initial low resistance state. The PPTC the small size, low cost, reusable, and thus to achieve the protection function automatically starts and automatic recovery.

In LED lighting, led lamp design fixtures and led down lights to the different applications have different thermal protection requirements, usually divided into two, respectively, reaching the required temperature, such protection is usually applied to road traffic signs; Another is starting protection, which has reached a certain temperature to drop current drive, such protection is usually used in indoor lighting and road lighting.

On the mutual balance of cost and protection programs of Overcurrent and overtemperature protection in the series combination of a giant array of lighting, or landscape lights, there are usually two kinds of protection schemes are available:

1. A shut protection. For multiple strings of led lamp design systems, we can protect in every branch. The benefits of this approach can achieve accurate protection, not a slip of the fault result in the lamps failure.

2. Main road protection. This protection is in the main loop of the lamps in series a PPTC, to protect the entire lamp. The benefits of this aproach is low cost, small footprint.

Exports of lighting products should comply with the target market standards

China is a global lighting fixtures production and consumption country in which  energy-saving lamps (led lights), incandescent production rank the first in the world. Under the stimulation and encouragement of government policies, the Chinese lighting industry has been booming. At the same time, the Chinese lighting industry have been expanding, the size and number of domestic lighting enterprises also simultaneously expand, and has attracted many foreign giants to enter.

Exports of lighting products should comply with the target market standards

Simultaneously, faced withe the global wave of energy saving and environmental protection can be achieved “green” LED lighting fixtures began to rise, showing the trends of rapid growth in China’s lighting products market. This has attracted more and more foreign enterprises tentacles into the business, and actively layout of the Chinese market, especially in the LED lighting market to get the next leadership opportunity.

It is no doubt that China’s lighting products market is undergoing rapid development. Flowing into the China market, the foreign enterprises must understand the local situation from the policy level and market level, producing for Chinese consumers need.

On the other hand, China is also a lighting products exporting countries, 70% of domestic production for export, in which North American and European markets. These two regional market requirements on product quality and usually require CSA, UL, CE and RoHS certification. With rising energy prices and concern for environmental issues, corporate and household lighting energy efficiency requirements have become more sophisticated, and thus more biased in favor of select energy-efficient, low-power products.  In this regard, the foreign market-related government has such projects, such as energy efficiency requirements of the product the higher the Energy Star program.

As foreign enterprises enter the Chinese, they need to comply with the policy of the Chinese market, domestic enterprises need to know the policy and market requirements of foreign market, while expand the North American and European markets. Take North American as an example, they usually need a reliable third-party testing and certification organization such as CSA Group. To test the product structure, quality and safety features to ensure that these aspects are in line with the requirements of relevant standards. Certified products can affix the certification mark by a third party testing and certification organizations.

Vegetables grow under “water”, the advanced LED lights act as the “sun”

Viewed from a far, it is no different with the general plant, in addition to some staff dressed in a white lab coat sway everywhere. Coming into the reporters view are rows of shelves, bright lights, orderly infusion tube and colored vegetables and long in the “water” (plant nutrition led street lights). In July 17th, the reporter went to the first domestic production of IT plant factory. Its seen and heard let everyone eye-opened.

Vegetables grow under "water", the advanced LED lights act as the "sun"

“Do not underestimate this area of 616 square meters of workshop, it was able to produce hundreds of tons of vegetables.” Efficient ecological agriculture Development Co., Ltd., Shandong Green Dragon General Manager Yang Enguo said with a smile. He told reporters that the plant factory concept was first proposed by Japan, and its essence is the factory production of vegetables and flowers with computer regulation. In 2010, the company worked with power-net company, introducing of Japanese technology and equipment, relying on Tsinghua University, China Agricultural University, Shandong Academy of Agricultural Sciences to do the technical guidance and post-technical support, absorption and utilization of domestic and foreign technology, IT Plant Factory improve marketing, technology and equipment in order to achieve localization of advanced led lights. Yangen Guo said: ” Plant as production IT factories in the country, it is the first one. ”

As the plant factory is completely closed, constant temperature and humidity, with modern monitoring equipment to monitors the proportion of various components in the air, which is avoid lacking of something, and added it at any time. Wind poured dust Clean program, the implementation of the human body disinfection, the reporters put on shoe covers to enter the factory. In the plant factory, his eyes reflected high-tech concepts and applications. Red and blue advanced led lights source 24 hours lighting. It can not only meet the plant lighting needs, but also save energy, nutrient solution instead of soil. The plants need reasonable rationing nutrition; Factory vents have the insect nets and supporting the isolation device, which can effectively prevention of pathogens and cleaner production, and to ensure the quality of the vegetables.

“Plant factory” technology is basically an indoor job. It is a  relatively closed environment, sterilization. Disinfection is basically physical, as it has few pests and diseases, and can produce green vegetables. From the perspective of food security, it can be said that it is a useful exploration of the quality and safety of agricultural products.

 

Foreign companies stationed LED commercial lighting market

Market expending of led commercial lighting

From 2010 to 2011, the two years is important time for the rapid growth and popularity of LED lights commercial lighting market. Compared with LED home lighting, commercial lighting market is more convenient in civil lighting market, sold in bulk and scale of procurement, which makes it obvious in the growth rate of the LED lighting in the LED commercial lighting market.

So far, commercial lighting is LED highest penetration rate of breakdown of lighting areas. It is easier for enterprises to accept the commercial space lighting in the price. In addition, with increasing consciousness of energy saving requirements, LED spot plays a growing role in commercial space. The data shows that commercial lighting accounts for 43% in the global lighting market of electricity consumption, which is the highest proportion. It takes 73% of the consumption for retail, office, storage purposes, educational buildings, health care applications.

Foreign companies stationed LED commercial lighting market

At present, there are about more than half of the existing LED commercial lighting needs to be replaced in the next three years. For the next decade, about 300 million people will go into cities, the city commercial lighting will further expand, which will lead to greatly prosperous situation.

Foreign companies spent a lot of money in LED market
From Guangzhou International Lighting Exhibition ended June, we can know that, besides the LED exhibiting significant increasing, another change is that LED products is gradually changing from decorative to functional. Under the baton of industrial policy, LED is getting new Pushing Hands. With the competition of foreign brands and domestic brands, the strategic change in function and decoration becomes the point. Who can take a great share finally? God knows.

Foreign brand competition is increasingly intense. Economic and Trade Commission of Guangdong Province authorities admitted that the LED market is large enough to satisfy everyone. But in another two years or even one year, it is difficult to say who will be the big boss. Indeed, China has become one of the global commercial lighting of the fastest growing market in recent years, annual growth of 20% constitutes a huge commercial lighting market. China’s lighting market have huge capacity, many brands, but it has been showing a dominant situation for foreign brand. More critical is the foreign brands use own technology, capital, sales and other advantages from epitaxy, chip, package, and application of a complete industrial chain, occupying the key areas of the market.

Mechanism Introduction for LED source

First, the light-emitting mechanism of LED lights source

with incandescent or gas discharge lamp light-emitting principle is very different. LED spontaneous luminescence is due to the compound of electrons and holes.

Mechanism Introduction for LED source

LED is formed by the  P-type semiconductor layer P and N-type semiconductor the formation of the N layer, and into the middle of the double hetero structure active layers. The active layer is a light-emitting area, the use of external power injected electrons to the PN junction under forward bias, the role of the N-zone electronic will is the direction of diffusion into the active layer, P area hole will be the negative direction of diffusion into the active layer, the electron and hole recombination will result in the spontaneous emission of light. As led source used different material, its diode electron, hole-share level different energy level high and low differential photon affect the binding energy of different wavelengths of lights, that is , the different color of light, such as red, orange, yellow, green, blue or is not visible and so on.

Second, the white LED bulbs

The emergence of the white LED provide white LED semiconductor lighting for the growing number of indoor and outdoor lighting project. The white led source luminous efficiency has made substantial progress, the white LED has even begun to challenge the status of the traditional light source.

The white LED has two main ways: The first one is to get white light through the phosphor conversion; second is to put different colors of LED chip package together with multi-chip hybrid white light. For the above two ways, according to the number of light sources in mixed white base color, it can be divided into two primary color system and the multi-primary color system.

Phosphor converted white LED

(1) two color phosphor converted white LED lamps

wo-color white LED is made ​​of blue LED chip and YAG phosphor. Generally use blue chip InGaN chip, and can also use the AlInGaN chip. The advantages of blue-chip LED with YAG phosphor are simple structure, low cost, simple production process, but there are a number of shortcomings, such as blue LED efficiency is not high enough, so resulting in  low white led source efficiency. The phosphor itself exist energy loss, and with the aging time of  phosphor and packaging materials, it also result in the color temperature drift, and shortened life expectancy.

Judgment standard for LED lighting products

LED lights industry need pay attention to develop the measurement standards

LED light-emitting surface is small, narrow beam, he characteristics of high brightness decided the particularity of detection.In order to deal with this problem, CIE set up seperately the “TC2-45 LED measurement and TC2-46CIE/ISO LED strength measure standards ” two technical committees. CIETC2-34 team held a meeting in Vienna, headquarters in October 1997, develop and recommend CIE127-1997 LED measurement standards, it involves  LED radiometric, photometric and colorimetric measurement. But because the rapid development of LED technology in recent years, especially the white LED lighting products, a lot of problems are not taken into account in the past. Therefore, the CIE at the annual meeting held in Kyoto, Japan, in 1999, proposed by the participants on behalf of the developed countries, to develop the white LED lighting equipment standards by CIETC2-34.The Japanese delegation also submitted two draft standards of general lighting with white LED.

Judgment standard for LED lighting products

In order to develop LED lighting products, developed countries have attached great importance to the study of LED spot test methods and standards. Such as theU.S. National Institute of standard tests (NIST),organizations the
international renowned testing experts to carry out the LED test, focus on studying the LED light emitting characteristics, temperature characteristics and lumen characteristics etc.test methods,and trying to establish a LED test methods of comprehensive set and technical standards. It has been walking in the forefront of the world in the aspect of LED test. Japan set up a “white LED Test Research Council, specializing in study of lighting white LED test methods and technical standards. In order to seize the developed countries in the world of high ground of the LED flood lights research, have invested a lot of manpower and resources in the LED standards and testing , the s focus on selection the parameters and testing methods of the led characteristics in the standard.

In China, there is no corresponding national standards about the semiconductor light-emitting diode test method , so often generated much controversy between different manufacturers and users . In recent years, the professional branch of the Optical Society of optoelectronic devices in succession organized academic discussions and exchanges of a number of semiconductor light-emitting diode test method,person in the industry form gradually more unified understanding, and develop a unified industry standard SJ/T2355-2005 semiconductor light-emitting diode test method, the exchange of products in the industry, played an important role in the comparison.

LED light source mechanism Introduction

Now, with the LED lights industry supply with mature, low barriers to entry, the influx of a large number of small businesses, resulting in excess of the LED industry and business capacity utilization is low, certainly competition in the market but the brand maker Philips (Philips), OSRAM Long (Os-ram) and GE, these manufacturers are actively occupying the main LED lighting market through vertical integration or strategic alliance layout. Whether it is the gross profit margin after the layers of exploitation or a powerful enemy camouflage, and thus a small factory are difficult to escape the huge market pressure.

LED light source mechanism Introduction

China has rich resources of non-ferrous metals, gallium, indium, accounting for 70% -80% of the world’s reserves, which makes the development of semiconductor lighting industry in China owning advantage on the resources. By 2010, the Chinese LED light source industry output value will be more than 150 billion yuan. Japan in 2002 cost five billion yen to implement white light, the entire project budget is 6 billion yen.

With the rapid growth rate of the penetration of LED bulbs, along with the price war arrival in 2010, because the LED is different from the traditional lamps and the light source separate from the sales model, under such pressure, some companies can not take into account quality and price competitiveness. It may fall into the acquisition or be doomed.

May 7, 2010 -12, lighting experts and entrepreneurs organize a line of Henan Province, the Illuminating Engineering Society Organization Investigation in Japan Japanese lighting the status quo, LED light source status is not satisfactory.

In recent years, the most interesting events in the lighting filed is the rise of the semiconductor lighting. In mid of 1990s, Japan’s Nichia Chemical Company Nakamura in the 20th century, breakthrough the key technologies for the manufacture of blue light-emitting diode (LED), and thus developed a fluorescent material to cover the blue LED to produce white light source technology.

The light-emitting diode is a new type of solid cold light source. The most notable characteristic is long life, high photoelectric conversion efficiency, good seismic performance, easy to use, etc. Under the same illumination, LED lamp power consumption and lifetime  have a distinct advantage than incandescent and fluorescent lamps.