Hua Shuming, director of the National Electric Light Source Quality Supervision and Inspection Center (Beijing), said yesterday that the output of energy-saving lamps in China has soared from 200 million in 1997 to nearly 2.4 billion last year. The output and export volume have ranked first in the world, the world. More than 85% of energy-saving lamps come from China. Since the supervision and spot check of energy-saving lamps in China in 1998, due to the increased supervision of product production, the promotion of national standards and requirements in enterprises, the qualified rate of energy-saving lamp products has been continuously improved.
According to the National Electric Light Source Quality Supervision and Inspection Center, China has become the world's largest producer and exporter of energy-saving lamps, and the quality of energy-saving lamps produced has been steadily increasing year by year. Since 2005, the quality inspection rate of energy-saving lamps has reached more than 80%. Consumers use energy-saving lamps to save electricity and money.
Hua Shuming said that due to the dominant position of large and medium-sized enterprises, although the qualification rate of enterprises has not increased much over the years, the pass rate of China's output calculation has been steadily increasing year by year. Large and medium-sized enterprises have large production scale, high degree of automation, good quality control, and many investment in technology development, but the number of enterprises is small. “10% of enterprises produce 90% of productsâ€.
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TFT LCD screens are characterized by good development, high screen, strong sense of layering, and bright colors, but there are also relatively power consumption and low cost. TFT screen technology legendary the development of mobile phone color screens. Many of them support 65536 color displays, and even have 160,000 color displays. With a very high screen TFT, the visual advantage is important.
Technical characteristics
TFT technology was developed in the 1990s. It uses new materials and new processes for fine semiconductor all-electronic manufacturing technology. It is the basis of liquid crystal (LC), inorganic and organic thin-film electroluminescence (EL and OEL) flat panel displays. It is a variety of films made on non-single materials such as glass or plastic products (of course also on the surface) through methods and chemical reaction forming processes, and a large number of micro-integrated circuits (LSIC) are produced through the processing of the films. Non-single crystal crystals can achieve cost reduction, which is an extension of traditional small integration to large area, function, and direction. Manufacturing TFTs that control the switching performance of pixels (LC or OLED) on large glass or plastic products has a higher technical content than manufacturing complete ICs on silicon wafers. The required production equipment and production technology surpass the production of large-scale integration of semiconductors, which is the luster of modern technology. The main features are:
(1) Large area: The first generation of large-area glass products (300mm×400mm) TFT-LCD-production line was put into production at the beginning of the nineties, and the area of eye glass has been expanded to 60mm×80mm in 2000), as well as 950mm×1200mm glass The design will also run.
(2) High integration: The size of the 1.3-inch TFT chip used for the projection of liquid crystal is one million for GA. The resolution is SXGA (1280×100×1280×1000×1280×1000×1280×1000×16.1 inch TFT screen amorphous film) 50nm, and TAB ON GLASS and SYSTEM ON GLASS technology, its IC integration, The technical requirements for equipment and supplier technology are more difficult than traditional LSI.
(3) Powerful function: TFT as a matrix selection solution provides the light valve characteristics of liquid crystal. TFT-LCD is the first Liquid Crystal Display in human history whose display quality exceeds that of CRT. The function will be more powerful, which is unmatched by traditional small integrated circuits.
(4) Design: Glass products and plastic products have fundamentally solved the problem of large semiconductors and opened up potential applications for the application of small semiconductors.
(5) Ingenious process: In addition to the use of vapor phase, chemical vapor deposition (chemical vapor deposition) MCVD (molecular chemical vapor deposition) and other processes to form films, laser flame technology has also begun to be applied traditionally, not only making amorphous films, polycrystalline films, but also Single crystal films can be manufactured. Can make silicon film, can also make other II-VI group and III-V group semiconductor thin film.
(6) Wide range of application fields. Liquid crystal display based on TFT technology is a rich industry in the information society, and the technology can also be applied to the rapid growth of thin-film organic electroluminescence (TFT-OLED) flat panel Display Screen shots. .
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