General situation and market prospect of LED industry chain in China

As the fourth generation of lighting products, LED is one of the most promising high-tech fields in twenty-first Century, the future of LED lamps will gradually replace incandescent and fluorescent lamps, etc.. The performance comparison of each generation lighting products is shown in table 1. Specifically, under the current technical conditions, LED has shown many advantages: high light efficiency. Almost all of the spectrum is concentrated in the visible light frequency, the efficiency can reach more than 50%, while the light efficiency of incandescent light efficiency is only about 10% ~20%. Because there is no ultraviolet and infrared spectrum, so no heat, no radiation, is a typical green lighting source. Small energy consumption. Single power in general 0.05~1 W, through the cluster can meet the different needs, waste is very small, with LED as the light source, in the same brightness under the power consumption is only ordinary incandescent lamp 1/8~1/10. long life. Luminous flux attenuation to 70% standard life is h, a LED lamp normally can be used for a period of 50 years; life will also use up to a maximum of 2 lights. Reliable and durable. There is no tungsten filament, glass and other easily damaged parts, non normal scrap rate is very small, very low maintenance costs. The application of flexible, small volume. Can be flat packaging, easy to develop into thin and short products, made point, line and surface of various forms of specific applications. The safe working voltage of 1.5~ 5 V. The green environmental protection. Waste can be recycled, no pollution, unlike fluorescent lamps containing mercury. 9 short response time. Frequent switching and high frequency operation.

In view of the advantages of LED, it is mainly used in the following aspects.

1) display, traffic signal display light source. The LED lamp has the anti vibration and impact resistance, light response speed, energy saving and long life and other characteristics, widely used in various indoor and outdoor display, divided into panchromatic, Tri Color and monochrome display, there are a total of more than and 100 units in the development and production of. Traffic lightsused ultra-high brightness red, green and yellow LED, because the LED signal has the advantages of energy saving and high reliability, so in the country, the traffic lights are gradually upgrading and promotion speed, large market demand.

2) applications in the automotive industry. The dashboard, car interior sound lights, switch back light, reading lamp and external brake lights, tail lights, side lights and headlights contain lights for automobiles. Automotive incandescent lamp is not resistant to vibration impact, easy to damage, short life, often need to be replaced.

3) LED backlight. The back side emitting light source with high efficiency and most notably, as LED LCD backlight applications, with long life, high luminous efficiency, no interference and high cost performance, has been widely used in electronic watches, mobile phone, pager, electronic calculator and card machine, with the portable electronic product miniaturization, LED backlight more advantage thereforeback light source production technology will develop to a thin, low power consumption and uniform direction.

4) LED lighting source. At present, the direct goal is to replace incandescent and fluorescent lamps with LED light source, which has been developed from the local application field.

5) other applications. For example, a welcome to children's shoes, walking when the built-in LED will flash, only 500 million years in Wenzhou to use a light-emitting diode.

Supply and demand analysis of LED market in China

1 China LED industry chain overview

LED industrial chain is divided into upper, middle and lower reaches, the upstream is epitaxial film production, midstream chip production, downstream refers to the packaging industry. Upstream epitaxial wafer production of the highest technical content, the investment is also large, followed by the middle reaches of the chip, the downstream packaging industry into the low-end easy. But in fact, the current packaging for high brightness chip heat dissipation, light put forward higher requirements, technical requirements and the importance of higher and higher. Industry shows a relatively small number of upstream and downstream enterprises, and many downstream enterprises in Pyramid form. In general, the global LED core device industry is developing rapidly, epitaxial wafer, chip, display technology and related silicon crystal and other semiconductor materials production technology has made significant progress. Gao Liangping, GAN chip, multi chip technology and various types of color technology are the representative results of the growth of LED core device industry in recent years.

After years of development, China's LED industry chain has become increasingly perfect, the enterprise all over the substrate, epitaxy, chip, packaging and application of various sectors. Throughout the industrial chain, due to the upstream industry for higher technology and capital requirements, resulting in domestic enterprises rarely involved, so there is a small number of enterprises in the industry, the characteristics of small scale. In contrast, because the downstream packaging and application to business of financial and technical requirements are relatively low, which is precisely the domestic enterprises and less money, technology weak match, therefore, a large number of domestic enterprises engaged in the two sectors. This uneven distribution of enterprise structure led to China's LED industry is dominated by low-end products, enterprises face severe price pressure for a long time. Along with the national semiconductor lighting project started, the development of the LED industry "Chinese state a quotyitouchenquotthe is changing, China upstream of the LED industry has been rapid development, the chip industry is most noticeable. But only from the industrial scale, packaging is still China's LED industry's largest industrial chain links. 2009, including the substrate, epitaxial, chip and packaging of the four sectors of China's LED industry output value reached 10 billion 550 million yuan, of which the output value of packaging components reached $8 billion 750 million.