Embracing urban lighting, crystal energy is constantly breaking through innovation

In recent years, the urban construction in China has shown a rapid growth trend. As a part of the urban infrastructure construction, the urban lighting industry has also developed rapidly. In particular, since 2017, China's urban lighting construction has entered the track of accelerating development in the background of the successive input of the budget, the upgrading and upgrading of urban lighting, the acceleration of urbanization and the improvement of urban road and energy saving, which has attracted the competitive layout of the LED, middle and lower enterprises.

At first, Chinese LED enterprises were trapped in many factors, such as relatively small scale, relatively lack of professional talent reserve and imperfect intellectual property protection system, and few achievements in the field of urban lighting. In recent years, this situation has changed, Chinese enterprises rise up and quickly seize market share.

Take the LED chip field as an example, in the past, the LED chip substrate market is divided into two major technologies, sapphire and silicon carbide, and the core technology is in the hands of the LED giants such as Europe, America and Japan and South Korea. Now, the technology of "silicon substrate high light efficiency GaN based blue light-emitting diode" has broken the monopoly of European and American technology. A way of developing LED with Chinese characteristics and winning the first prize in national science and Technology Invention Award in 2015 - the highest award in China's LED industry. This technology will play a role in promoting the development of Chinese enterprises in the field of urban lighting.

In view of the high demand for light source life for urban lighting, the LED chip using silicon substrate technology will be a better choice. As a substrate material, silicon is better in heat dissipation compared with the popular sapphire and silicon carbide in the current market. The thermal conductivity is 5 times (170 to 35) of sapphire (170 to 35). High thermal conductivity makes the silicon substrate have longer life and more stable reliability in practical application.

In addition, urban lighting requires high power LED light source with high illumination, long range, good light directivity, small angle, and high color consistency. Silicon substrate chips can meet the requirements very well. Silicon substrate chip has more uniform current diffusion, more advantages under large current, single chip can do 10W at present; furthermore, silicon substrate chip is single side out of light, without side light, light beam concentration, good directivity, high illumination, She Chengyuan; and ordinary sapphire chip is five surface light, light dispersion, and beam concentration. For example, a flashlight made from a silicon substrate can reach a range of 100 meters.

More importantly, the silicon substrate LED chip also has the advantage of encapsulation. Silicon substrate chip, because of its vertical structure and single side luminescence, can directly coating the surface of phosphor powder, ensure the surface evenness and uniformity of phosphor powder, solve the problems of uneven spot and yellow ring, improve the quality of the product, and can accurately control the thickness of phosphor (positive or negative 2um), so that the concentration of color temperature is greatly increased, 1 Bi N (>95%), 3 step. With the traditional fluorescent powder, the thickness of the surface phosphor is different and the consistency is difficult to control, which leads to the inconsistency of light in all directions, and it is easy to produce the yellow ring and the uneven spot of the light spot.

In the packaging technology, the crystal energy optoelectronic also has a breakthrough, the introduction of composite material reflection bowl structure CSP technology, this is a form of non - support package. Compared with five surface luminescence CSP, single side luminescence CSP and composite material reflecting bowl structure CSP, the three CSP processes have their own advantages. The five surface luminescence CSP has high light efficiency and high luminescence angle, while single side luminescence CSP is good for two optical design and strong center illumination, but there are insufficient brightness, over dependence on flip chip technology and chip easy to be cracked. The composite reflector bowl structure CSP has the characteristics of high brightness and high brightness at the same time. The composite material is used to protect the flip chip, which greatly enhances the reliability of the CSP and reduces the failure risk in the application process.

It is understood that at present, only Japan, crystal energy and Samsung can be produced by the composite material reflecting bowl cup structure CSP LED. Liang Fubo, vice president of crystal energy (Jiangxi) Co., Ltd., said: "the composite material reflecting bowl structure CSP LED is more than 10% higher than the five surface structure, which is more in line with the urban lighting requirements. Crystal energy has been launched 1717, 1919, 2121, 2727 and other specifications, the future will also increase research and development efforts to improve this series of products.

Liang Fubo said: "urban lighting mainly includes outdoor road lighting, landscape lighting, and architectural landscape lighting. At present, European and American outdoor road brightening market is mainly based on high-power ceramic LED, while the main domestic and large power EMC packaging and high-power ceramic packaging are mainly in China, each has a certain proportion. Garden and architectural landscape lighting is mainly small and medium power, accounting for 80% of the market. But in some small angle products and high illumination products, ceramic packaging with high power LED is the best choice. "

Ceramic packaging has the characteristics of good reliability (good heat dissipation, moisture resistance, corrosion resistance, anti-seismic, anti vulcanization, anti UV), small luminous area, high light intensity, high density, and single side out of light. In addition, with the decrease of raw material prices and the maturity of chip technology in recent years, the price of ceramic packaging products has been reduced rapidly and has been widely used in the field of urban lighting.

"Crystal energy provides a series of high-power white light products for outdoor landscape lighting, street lamps and public lighting, and is used in many urban lighting projects, such as Ningbo, Nanchang, Guangzhou, and New York, USA, etc. In December 2018, the crystal will also launch the color CSP product, which is beneficial to the design of landscape lighting. " Liang Fubo said.

Of course, in addition to the products used in urban lighting, the crystal can also provide car lighting, mobile lighting, plant lighting, mobile flash light, ultraviolet LED and infrared LED products, and have obtained the affirmation of the customers.

With the progress and maturity of various technologies, the development of Chinese LED enterprises in the field of urban lighting is no longer stagnant, not only technical breakthroughs, but also great progress in scale, talent reserve and intellectual property.

As far as crystal energy is concerned, the current registered capital is 123 million dollars, and the Nanchang and American sales companies are set up. The factory area covers an area of more than 1000 mu, the existing production, research and development and supporting plant area of more than 20000 square meters. At present, there is an industrialization base of the national silicon based LED Engineering Research Center approved by the Ministry of science and technology. It has MOCVD25 equipment for R & D and production, and the value of equipment is more than 1 billion 500 million yuan. In 2012, it was prepared to build a wholly owned subsidiary, Jiangxi Province, crystal optoelectronic Co., Ltd., and was put into production in October 2013. It has the first-class technology and automatic packaging equipment in China.

Production capacity 80KK/ months, ceramic packaging large China production first, the number of shipment is the first.

In terms of R & D capacity, more than 10 people in the United States and South Korea were introduced to crystal energy, of which three were selected in the middle group "1000 people plan", and two were selected in the middle group "10000 people plan". The team has undertaken 9 National 863 plans, 6 electronic development fund projects, and 2 national major industrialization projects.

With respect to the layout of the patent, crystal energy is the only enterprise in China's LED industry with a complete core patent and layout. There are more than 340 patents for LED technology patent pool on silicon substrate, with 147 patents authorized, including 47 international patents, covering industrial chain epitaxy materials, chips, packaging and applications.

Throughout the industrial chain, the status of Chinese enterprises is becoming more and more prominent, the performance in the field of urban lighting is more so. Crystal energy is one of the members, through continuous breakthrough innovation to open up the market share in this field. Liang Fubo said that in the face of the rapid development of the urban lighting market, China should embrace it and believe that the future development of Chinese enterprises in the field of urban lighting will be better and better. (LEDinside Nicole)

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