The explosive growth of market demand has driven the popularity of the large-screen display industry. DLP rear projection, LCD display, led screen and other technologies have changed, driving a new round of competition in the big screen display industry. The fierce competition environment has also driven the product upgrade and market maturity of the display technology itself. With the deepening of the development process of led display and the improvement of market maturity, the demand for LED screens in the commercial market has also seen a new weather. The overall trend is that the application area of ​​led screens has begun to appear classification refinement. The market segment further drives the segmentation and evolution of led display products. As is well known, as a representative of high-definition large-size display, LED display screen has almost the status of outdoor display king, and is usually defined as a large-size display product installed on the outer wall of the building and the top of the column. However, the development of technology and market requires that the LED screen must adapt to the new needs of diversified applications. Among them, the digital signage industry application is a force that cannot be ignored. According to the authoritative research organization HIS, the global digital signage market revenue will exceed US$15.1 billion in 2014, an increase of 6. Compared with the previous year, the largest share of digital signage displays will achieve more than US$6 billion in revenue by 2018. The display industry has created good development opportunities. As the main carrier of outdoor media, LED display currently occupies a market share of more than 60, and its diversified applications are increasingly becoming a breakthrough for LED companies. In the past, the digital signage industry dominated by liquid crystal displays has also embraced LED screens. The use of led displays in shop windows, subway stations, and chain restaurants is increasing. Compared with other display technologies, led display is a kind of self-luminous technology product, which has the advantages of innate high brightness, low power consumption, long life and beautiful color. Compared with liquid crystal display, it is super large size and special display. It is also easier to implement and can fully meet the complex display application requirements under the refined process of application. The innovative development of the digital signage industry has raised the display requirements and achieved a high degree of overlap with the diversified development direction of LED display applications. With the rapid development of the global digital signage industry, the LED display industry will also benefit.