In recent years, with the increasing maturity of semiconductor technology and manufacturing technology, the dot spacing of LED display screens has become smaller and smaller, the density has become higher and higher, and the clarity has also been continuously improved. the functions and application fields of small-pitch LED display screens are also constantly enriched. They begin to enter indoors from outdoors and are rapidly replacing traditional LCD, splicing Wall, projection lamp and other display products. This undoubtedly has higher requirements for the machining accuracy of the box body and module, as well as the production process and display system. The LED display market is still in a rising stage. With the advancement of urbanization and the promotion of efficient and environmentally friendly lighting, the LED industry has developed rapidly in recent years. Among all LED application fields, general lighting and automobile lighting are fast-growing markets, which have become important driving factors for the rapid growth of LED market scale in the future. In addition, the LED display application market still shows great growth potential, which is one of the stable growth points in the LED application field. China report Hall predicts that in the field of general lighting, the output value of LED lighting will reach 17. 8 billion US dollars in 2014, and the overall shipment volume of LED lighting products will reach 13. 0. 2 billion. Philips market forecast shows that by 2016, the market size of LED-related lighting products will reach 70 billion- Between 80 billion euros, the proportion in the overall lighting market can reach 45-50. Display screen is also one of the main application fields of LED. The LED display screen has the advantages of high brightness, large viewing angle, long visual distance, flexible and changeable shape, rich colors and the like, and can meet the needs of different application scenarios. especially in ultra-large display applications, it has obvious advantages. China's LED display industry has maintained a high-speed development since it started in 1990s, creating the initial prosperity of the LED industry. At present, the LED display market is still on the rise. In the era of small spacing of LED display screens, the small spacing market started in 2012, gradually matured in 2013, and demand grew rapidly in 2014. When Small spacing products became popular quietly, major LED manufacturers have begun to compete to launch their own small-pitch strategies, and the prospects for small-pitch LED products at home and abroad are also promising. Among them, high-density small-pitch LED display screen is an important emerging market in the industry, and is also one of the markets with higher profit margins. At present, more than 20 domestic LED enterprises have released their own small-pitch products. such as Liad, zhouming technology, Lianjian Optoelectronics, abisen, yishida electronics, Shanghai Sansi, meirui Optoelectronics, Dazu Yuanheng, Qipu optoelectronics and other enterprises. Take abbison as an example. In 2012, the company began to launch small-point spacing products, focusing on the European, American, Japanese and Korean markets, with a good harvest. By the first half of 2014, the total order amount was about 0. 2 billion yuan, orders in the first half of 2014 increased by more than 2 times compared with the same period in 2013. With the improvement of technology, the display accuracy of small-pitch display screen fully meets the needs of close viewing, and will compete with DLP and LCD splicing screens, with great market prospects. The market space of small-pitch LED display screen was seized, which originally belonged to DLP display wall, LCD and PDP splicing screen market. The situation of LED small-pitch display screen with the rise and continuous growth of the emerging commercial market for civil use, products such as small-pitch LED televisions have been quickly recognized and will accelerate the development of small-pitch LED. Small spacing will not only stick to the control room. The space for indoor display market is huge, especially the conference, command and control market that originally used high-brightness DLP professional engineering projection, it is easily broken by small-pitch LED display. In addition, for applications that do not need high-resolution maps or engineering drawings, such as various image projects, background walls of radio and television industry, commercial brand display, public information display, intelligent transportation and other application fields, these are also the driving forces for the continuous development of small spacing. But on the other hand, the small-pitch LED display screen does not have the ability to completely replace the LCD TV. On the one hand, with the improvement of resolution and the reduction of point spacing, higher requirements are put forward for heat dissipation, service life, color consistency, maintenance, etc. It is not easy to solve the problem. On the other hand, low brightness and high ash have become a threshold that LED manufacturers must cross when entering display applications. Small-pitch LED screens must reduce brightness without losing gray scale and image quality. At the same time, the high cost limits the popularization and development of small spacing to a certain extent. It will take some time for LCD TV to occupy the main force in the market. Conclusion: LED full-color display screen has been integrated into all aspects of our life, especially the rapid development of technology in recent years, as well as the advent of small-pitch LED display screen. Some experts predict that a revolutionary change will take place in the LED display field. In the next 10 years, liquid crystal displays are likely to exit the mainstream stage like CRT displays and will be completely replaced by small-pitch LED displays.