From single and double color to full color, from outdoor to indoor, combing the development history of LED display industry, we can find that substitution is always a main line of industry development. We can divide the substitution of products into two types. This type is the upgrading of LED display industry's own products. For example, in the early days of the industry, full-color LED display replaced single and double color products among the people, and at present, high-density products replaced low-density products; The second is the replacement of LED display screen for competing products in other industries, such as neon lights, inkjet advertisements, advertising light boxes and other outdoor information display media, as well as LCD screens, DLP rear projection and other indoor display devices. It can be seen that with the efforts of the whole industrial chain, the market boundary of LED display screen has been continuously broken, the application scope has become wider and wider, and the market space has been greatly improved. In the field of indoor display screen, LED screen grabs DLP and LCD market. The emergence of small-pitch LED display screen and LED advertising machine has brought a heavy blow to DLP and LCD market. Compared with traditional LED display screen, LED advertising machine has a small screen area, low unit price and wide range of use are conducive to enterprises to increase shipments. From the perspective of customers, LED advertising machines provide advertising operators with display devices superior to LCD screens in the medium and small screen markets. Compared with indoor large screens, LED small-pitch displays are more competitive and profitable, which can effectively improve the profitability of enterprises. For end customers, the emergence of LED small-pitch display screen has broken the situation that DLP unifies the indoor display market and provided new choices for users such as traditional meetings and commanders. It can be said that these two products have broadened the scope of use of LED displays. Since the launch of the indoor high-definition LED display screen, most of it has been used in military command centers, coal mining industry, real estate developers, and government departments. LED display screen upgrading industry welcomes new vision compared with the business opportunities brought by replacing display equipment in other industries, the market space formed by the upgrading of LED display screen products will be more imaginative. The upgrading of LED display screen itself can be divided into two aspects: first, the replacement formed by the original product reaching its service life. It is understood that due to the influence of LED light attenuation, the life of LED display screen is generally about five years. The past five years can be said to be the five years of China's LED display Gold. LED display has been greatly popularized in advertising, stage, stadiums and other fields. Therefore, in the next few years, there will be a large number of LED displays that have reached their service life and need to be replaced, which will undoubtedly bring huge economic benefits to enterprises. Secondly, new technology products replace traditional products. Up to now, there are two development trends in the industry that deserve the attention of enterprises. It is the trend of full-color LED display screen replacing single and double colors; Before, the full-color LED display screen was not as simple as single and double colors due to its high price. The maintenance cost of the manufacturer in the later period was relatively large, which failed to really shake the position of single and double colors in the door screen market. Nowadays, with the progress of technology and the decline of cost, the front screen market, which is the defense line for single and double color products, will soon be broken by full-color LED display screens. The second is the trend of replacing low-density products with high-density LED display screens. With the progress of upstream chip and packaging technology, taking outdoor LED display screen as an example, P10 outdoor full-color LED display screen, a mainstream product in the industry, has now become a new favorite, whether it is a surface sticker or an in-line lamp process. Lian Chengfa also developed an outdoor three-in-one in-line product by improving the in-line process and packaging the RGB three chips into an in-line lamp. Using this kind of packaging method, the in-line LED display screen can achieve lower density without changing the production process, thus increasing the competitiveness of Liancheng high-definition LED display screen in the outdoor market. To sum up, the upgrading of LED display screen will bring new growth momentum to the industry. Both indoor and outdoor LED small-pitch display screens and LED advertising machines will open up new markets for the industry. In addition, the demand for LED display screens held in Brazil World Cup and the demand for replacement of road LED display screens adjusted by the United States will all become favorable to the industry. The LED display screen in 2014 will move towards a brighter future.