LED display technology

　　LED display is one of the main application fields of LED, which has developed rapidly in recent years. At present, LED display screen has advanced production technology and low price, so it is difficult for foreign companies to compete in the mainland market. According to incomplete statistics, in 1998, there were more than 150 LED display screen manufacturers in China, which manufactured about 50000 square meters of all kinds of displays, achieving an output value of 1.4 billion yuan. The LED industry has made remarkable achievements. In recent years, in terms of product structure, production technology, product quality, mass production level, market share, etc., it is close to Japan, and ranks third in the world after the United States and Japan in the world LED industry. Over the past five years, the average annual growth has reached more than 20%. In 1997, Taiwan's top ten optoelectronic products ranked fourth, with an output value of SGD 18870 million. Epistar Corp has successfully developed red, green and blue chips for full-color lights and displays, with the light intensity of these chips exceeding 70 mcd. A company that is putting into production uses MOVPE technology to produce InGaAlp super brightness luminescent materials and chips. Taiwan has seven companies producing LED chips, which produce various traditional chips, accounting for more than 70% of the world's output.

　　The application of LED is very common. Because of its low working voltage, low power consumption, rich colors and low price, it is welcomed by electrical engineers and scientific researchers. In the early days, the traditional products had low luminous efficiency, and the light intensity was usually several to dozens of mcds. They were suitable for indoor applications, such as home appliances, instruments, communication equipment, microcomputers and toys. Due to the growing development of application technology, new application opportunities have emerged for traditional products. The popular LED Christmas lights, with their novel shapes, are duck billed Christmas lights, colorful ball lights, and pearly window lights. They are colorful, unbreakable, and safe for low-voltage use. Recently, they have a strong market in Southeast Asia, such as Hong Kong, and are widely welcomed by people. They are threatening and replacing the existing Christmas market for lightning bulbs. A kind of shiny shoes popular with children, which uses LED to flash when walking and sleeping. It is very eye-catching, including monochromatic light and dual color light.

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