LED for the consumer may still have some strange, but it is accelerating the pace into our family. The near future, LED will not only replace our current lighting, will replace the current that the lamp backlight and LCD TV ... ...
LED significant advantage
LED, or light emitting diodes. LED backlight with a long life (100,000 hours), high color purity and high color reproduction, high brightness, not afraid of cold, strong adaptability, reliability, features non-mercury pollution in the future field of LCD backlight will occupy a pivotal position. With the continuous improvement of brightness, LED not only can make a variety of lamps, but will also gradually replace the CCFL (cold cathode fluorescent tube) backlight, the most important liquid crystal display backlight.
CCFL, the average life expectancy is usually in the 20,000 to 50,000 hours, while the LED, the average life expectancy is up to 10 thousand hours; CCFL startup voltage up to 1600 volts, starts the voltage of 800 volts; and white LED's start voltage only 24 volts, the voltage starts lower, only 12 volts; CCFL mercury, LED does not contain mercury, is the green environmental protection product.
According to Daktronics, director of product consultant and cattle production introduced Bradley, light-emitting diodes doped by several thin layers of semiconductor material, a layer with an excess of electrons to form another layer of the lack of electronic space with a positively charged point, when the current through the work, the electron and hole combination, the excess energy in the form of Zeyi ray radiation is released. By using different semiconductor materials can be different luminescence of light-emitting diodes. Unlike ordinary cathode-ray tube TV (CRT), plasma screen (PDP), LCD screen (LCD), LED display is the use of light emitting diodes as light emitting devices consisting of display, because of its high brightness, colorful colors, use of low-voltage, low power, long life and other advantages, though can not do 180-degree angle, the pixel pitch can not be done now is too small (typically ≥ 3 mm), but the LED display its unique advantages large display, especially in well-lit indoor and outdoor gradually replace other products, and as technology continues to develop, will replace the current backlight.
According to the China Optics and Optoelectronics Manufactures Association branch of LED display application statistics show that China's LED display market in 2007 achieved sales of 7.2 billion in the next few years will remain relatively high growth rate. Believe that with the LED display technology innovation, costs continue to decline and people on the LED product awareness has deepened, color LED display will further expand the scope of application, and in the social and economic development play a significant role.
Companies are involved in
The advantages of LED manufacturers have gradually been recognized for its future, manufacturers are also consistent with good. Thus, regardless of lighting or appliance companies are moving into LED manufacturing areas.
Today, the development of ultra-thin flat-panel TVs has become an important trend, and flat-panel TV energy consumption, environmental protection and other issues is the focus of attention of consumers. The application can be easily implemented LED LCD TV ultra-thin, energy saving and environmental protection. Konka has entered the LED field. Reporter learned from Konka, Konka LED backlight design and production lines will Kunshan City, Jiangsu Province, laid the foundation stone. Meanwhile, Konka LED sapphire substrate has a development team reached an agreement to promote the most upstream in the layout of LED. Konka to sources, in the next 3 to 5 years, including construction of LED display, LED lighting, LCD TV LED LED backlighting applications, including industrial and sapphire upstream industries such as LED, LED to form a complete industrial chain, strive to break through billions of annual output value. "This is not Konka's whim." In the LED industry for Konka's strategic layout, deputy general manager of Konka Institute Tang Hongmin that, LED industry is in growing demand of the rise is expected to use LED backlighting in 2009 launched. LED output current rapid growth in China, but many are components suppliers and OEM production. To build a complete industrial chain, Konka has built a special LED technology is responsible for post-doctoral workstations and two R & D team. In fact, back in 2001, Konka set up a wholly owned subsidiary of Konka video as pathfinder into the LED industry.
At the same time, LED light source projector is developing rapidly, by many industry experts as the most promising future projection technology and the development direction of this trend, many brands have launched a mini LED projector products. According to reports, LED light source projected the biggest advantage is that life, the projector LED module life of about 2 million hours, which greatly reduces the use of cost and maintenance costs. If consumers buy a home projector, an average of 2 hours each day, then the year is 730 hours, 20,000 hours life expectancy to 27 years can almost see, even if the average of 6 hours each day, you can also see nearly 10 years. This means completely solved the bottleneck impeding universal projector problem - the problem of low lamp life.
According to Vice President of Tsinghua Tong Fang Min Sun said, Tsinghua High Brightness LED with side lighting project has been basically achieved industry, currently has five production lines put into operation the first quarter of next year, will add 15 production lines.
The problem still exists
Domestic LED industry are more than 30% per year rate of rapid development. LED application products in China in 2007 the output value has exceeded 300 billion yuan, however, LED's development there are still some problems.
Chen Yansheng China Lighting Association chairman, said the rapid development in recent years, LED, businesses take the road of independent innovation, not only to eliminate a number of technical obstacles, but also help to break the monopoly of foreign products, promoting low-cost era. However, innovation in technology still improve, especially in white LED applications still in development stage.
China Optics and Optoelectronics Manufactures Association optoelectronic devices branch of the Secretary-General Peng Wan-hua said that at present China's high light efficiency, high reliability LED imports nearly all applications of high-grade epitaxial silicon, epitaxial LED chip production in China in recent years, although the great development and progress, but still stay in the middle and low level. Face of the upcoming LED golden period of development, such as domestic enterprises in the upstream LED chip, sapphire substrate, LED backlight, and the middle reaches of the packaging and testing and other areas are involved in is not deep, irrational industrial structure, the lack of voice.
It was also introduced, although the rapid development of LED industry, but the industry was not a normative standard. Made on the LED light bulb in the form of base, made of tube length, diameter, socket type, wire rough, usually determined by the company since, and can not achieve universal.
Reporters from the national Ministry of Industry and Information Technology Standards Working Group of semiconductor lighting technology was informed, along with the rapid development of LED lamps, energy saving lamp road lighting in the home decoration and other aspects will play an increasingly important role. To this end, the development of industry standards to LED lights have been put on the agenda, the current National Standardization Technical Committee authorized Lighting LED Kingsun Enterprises as a "road with LED lights" and "decorative LED lights," the two drafting of national standards.
Experts point out that as technology advances, LED lighting and television will become the main force in the industry.
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