LED "surface light source" technology made a breakthrough in Nanjing

LED "surface light source" technology made a breakthrough in Nanjing
LEDs are green energy-saving lighting materials that replace traditional incandescent lamps. However, LED "point light source" products currently used have the disadvantages of easy light decay, high cost, and slow heat dissipation, which affects the process of promotion. Replacing the "point source" with a "surface source" is a key technology to overcome the deficiencies of existing LED products. Under the support of the “Nanjing 321 Plan”, LED “surface light source” technology has recently made a breakthrough in Nanjing.
Magic: the desk lamp without light bulb is very bright
Yesterday, at the Nanjing Xiongyan Optoelectronics Technology Co., Ltd. in the National University Science and Technology Pioneer Park of Nanjing University of Technology, the reporter saw a table lamp using LED “surface light source” technology. Lamp holder, lamp neck, lamp holder... At first glance, this table lamp is no different from ordinary table lamp. But the reporter looked at it differently and saw the difference - there was no light bulb in the desk lamp. When there is no light bulb, when the reporter is puzzled, the general manager of the company, Guo Guohua, turned on the switch, as if it were magical, the bright light sprinkled from the lamp without the bulb.
"The secret of illuminating is this illuminator." In the direction of the finger of Yan Guohua, the reporter saw a small circular piece at the lamp head, less than 4 cm in diameter, less than 1 mm thick, and a yellow background. Look closely, there are small black spots on it. "In fact, every little black dot is a tiny illuminator. As you can see now, this light source is made up of 300 small chips. This lamp is 3 watts, which is equivalent to 20 watts of ordinary lamps. "General Manager of the company, Guo Guohua said. This 10 watt light source is made of a luminaire with a brightness equivalent to a 100 watt incandescent lamp.
"Different from the 'point light source' commonly used in the LED industry, our products are illuminated on the whole surface, and others' products are on the spot (lights)." Guo Guohua said that the company invested a total of two or three million yuan, which took 5 time. During the year, the core team independently developed the LED “surface light source” technology, in which the light source chip and the driver chip all have independent intellectual property rights. Last year, the project was also selected for the “Nanjing 321 Plan” support project.
Advantages: longer life and energy saving than "point source" products
LED "surface light source" products are more energy efficient and have a longer life. Lu Hanxiong is the core R&D staff of the company. He is also a Fellow of the Hong Kong Institution of Engineers and a Royal Engineer. He told reporters that the company has made special calculations for this purpose. Taking 10 watt LED "surface light source" lamps as an example, it saves more than 90% of energy compared with incandescent lamps, and saves at least 50% of electricity than ordinary energy-saving lamps. The "light source" LED lamp saves more than 20%. The electricity saved each year is equivalent to saving 13.88 kilograms of standard coal, reducing sulfur dioxide emissions by 0.41 kilograms, and reducing carbon dioxide emissions by 14.14 kilograms. Moreover, since the LED "surface light source" is a DC power supply, the general illumination is avoided because of the stroboscopic effect of the AC power supply, which is a green light source that is particularly beneficial to eye health.
"LED lights tend to have light decay, that is, after a period of lighting, the intensity of the light will be weaker than the original. We have effectively overcome this problem, and have passed the long-term aging test of the National Photoelectric Testing Center to prove the LED 'surface light source. 'The lamp illuminates 5000 hours with only 0.9% light decay.” Yan Guohua said that the LED "surface light source" lamp has an average life of 30,000 to 50,000 hours, greatly reducing the maintenance cost of the lamp and the trouble of replacing the lamp. At the same time, the problem of slow heat dissipation of the lamp is well solved. "For example, a typical 1 watt LED point source lamp bead is usually a heat sink concentration point, while an LED surface light source lamp has 50 or even hundreds of heat dissipation points, and the heat is from The source will naturally come down."
Prospects: Low cost makes LEDs truly enter the home
As the government vigorously advocates energy conservation and emission reduction, the LED lighting industry is ushering in the golden period of development. LED lighting has been increasingly used in many fields such as architecture, landscape and municipal engineering, but there is still a considerable distance from ordinary home users. The reason is mainly because there is no complete breakthrough in the domestic LED product technology and the price remains high. At present, domestic LED manufacturers mainly aim at market areas such as architectural landscape lighting, large-screen display, traffic signal lights, etc., and the products for ordinary people are obviously underdeveloped, and the market is almost blank.
Yan Guohua said that this year, the company will invest about 6 million yuan to build the first LED "surface light source" packaging line based on small power chips in the Nanjing Binjiang Development Zone, which is expected to be promoted at the end of the year. Later enterprise development also plans to introduce the world's latest large-area chip production technology, coupled with a new generation of packaging technology, it is expected that in three to five years, the cost of LED "surface light source" can be reduced from about 6 yuan per watt to 1 watt per watt. - 2 yuan, becoming an epoch-making revolutionary green lighting new product.
The reporter learned that Nangong University has taken the lead in adopting their products. Enterprises are also willing to take the lead in publicly collecting a number of government agencies or universities that have high energy consumption and install a batch of the latest LED "surface light source" products for free.

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