China's LED industry started in the 1970s. After more than 30 years of development, China’s LED industry has initially formed a relatively complete industrial chain including the production of LED epitaxial wafers, the preparation of LED chips, the packaging of LED chips, and the application of LED products. LED companies in China are developing relatively fast Many, such as NVC lighting, rectangular lighting (300301, shares it). Driven by the "National Semiconductor Lighting Project", seven national semiconductor lighting project industrialization bases have been formed in Shanghai, Dalian, Nanchang, Xiamen, Shenzhen, Yangzhou and Shijiazhuang. The Yangtze River Delta, the Pearl River Delta, the Fujian Delta and the northern regions have become the gathering places for the development of China's LED industry.

　　 At present, the development of China's semiconductor lighting industry is improving. The development of epitaxial chip companies is particularly rapid, the scale of packaging companies continues to maintain rapid growth, and lighting applications have made greater progress. The concentrated display of LED lighting in the 2008 Beijing Olympics gave people a new understanding of LEDs, which strongly promoted the development of China's semiconductor lighting industry. The basic characteristics of LED light source:

　　 1. High luminous efficiency. After decades of technological improvement, LED's luminous efficiency has been greatly improved. The lighting effect of incandescent lamps and halogen tungsten lamps is 12-24 lumens/watt, fluorescent lamps 50-70 lumens/watt, and sodium lamps 90-140 lumens/watt. Most of the power consumption becomes heat loss. The improved LED light efficiency will reach 50-200 lumens/watt, and its light has good monochromaticity, narrow spectrum, and can directly emit colored visible light without filtering. At present, countries all over the world are stepping up research on improving the luminous efficiency of LEDs, and their luminous efficiency will be greatly improved in the near future.

　　 2. Low power consumption. LED single tube power 0.03-0.06 watts, using DC drive, single tube driving voltage 1.5-3.5 volts, current 15-18 mA, fast response speed, can be operated at high frequency. Under the same lighting effect, the power consumption is one-eighth of incandescent bulbs and one-half of fluorescent tubes. Japan estimates that, for example, using LEDs with luminous efficiency twice as high as fluorescent lamps to replace half of Japan's incandescent and fluorescent lamps. The equivalent of 6 billion liters of crude oil can be saved every year. For the bridge guardrail light example, a fluorescent lamp with the same effect is more than 40 watts, while the power of each LED is only 8 watts, and it can be changed in colorful colors.

　　3. Long service life. The use of electronic light field radiation luminescence, filament luminescence easy to burn, thermal deposition, light attenuation and other shortcomings. The LED lamp is small in size, light in weight, and epoxy resin encapsulated, which can withstand high-strength mechanical shock and vibration, and is not easy to break. The average life span is 100,000 hours. The service life of LED lamps can reach 5-10 years, which can greatly reduce the maintenance cost of lamps and avoid the pain of frequent lamp replacement.

　　4. Strong safety and reliability. Low heat, no heat radiation, cold light source, safe to touch: can accurately control the light type and angle of light, the light color is soft, no glare; it does not contain mercury, sodium and other substances that may be harmful to health. The built-in micro-processing system can control the luminous intensity, adjust the luminous mode, and realize the combination of light and art.

　　 5. Conducive to environmental protection. The LED is a solid luminous body, which is shock-resistant, impact-resistant and not easily broken. The waste can be recycled and there is no pollution. The light source is small in size and can be combined at will. It is easy to develop into a light, thin, short and small lighting product, and it is also easy to install and maintain