Small pixel led display will be popular in coming future

Small pixel led display will be popular in coming future

China's development of LED started in the 1970s, and the industry appeared in the 1980s. There are more than 100 enterprises in the country, and 95% of the manufacturers are engaged in post-package production. The required dies are almost all imported from abroad. Through several "five-year plan" technical transformations, technical research, the introduction of foreign advanced equipment and some key technologies, China's LED production technology has taken a step forward. With the standardization of conventional products and the specialization of application products in specific fields, the future development of LED displays is optimistic.

Domestic LED display market development status

The technology and performance of LED devices continue to improve, and the development of electronic technology is changing with each passing day, which brings a good foundation for the technical deepening and improvement of LED display products. At the same time, LED display has been widely used in various fields of social life. The development of semiconductor lighting industry has brought a good opportunity to the LED display industry. Therefore, the LED display market has an optimistic development prospect. Deepening the technical connotation, enriching the product system, diversifying products, and highlighting the advantages of leading products will be an important trend in the development of the LED display industry.

 Standardization of conventional products and specialization of application products in specific fields

The promotion and implementation of relevant standards will promote the standardization of LED display products. Among the conventional LED display products, standardized display devices and control systems will be more widely adopted. Integrated LED display products will occupy a major position in the industry. The specialized division of production of standardized LED display products and market technical services will be more obvious. In the field of professional applications, LED display products will meet the needs of professional applications, and the level of specialization will continue to improve. Specialized products combined with application requirements will expand into new products and new application fields that form LED displays, such as the large-scale urban lighting project. Area LED display, LED display of stadiums, LED display in traffic field, etc.

Reasonable division of labor within the industry and formation of a new industrial structure

Due to the development of technology and the market, China's LED display industry will gradually improve and have a reasonable division of labor in the adjustment, forming a new industrial structure. In the overall industrial chain, the formation of leading enterprises in LED device production and key enterprises in the production of display products will redefine the division of labor between upstream and downstream industries, highlighting the specialized division of labor and collaboration. Perhaps in the early stage of the development of the semiconductor lighting industry, the definition of specialized division of labor and collaboration between LED device manufacturers and display product manufacturers is rather vague, but with the expansion of the market and the maturity of technology products, this definition will become increasingly clear.

In the LED display industry, the enterprise groups within the industry will be properly classified, and a technology-developing enterprise based on key control system technology research and development will be gradually formed. Product-oriented enterprises based on large-scale and standardized production will be promoted by the market application. The main technical service-oriented enterprises, professional application-oriented enterprises that meet the needs of professional markets.

LED display four development trends

The overall level of microelectronic assembly technology continues to improve, and the pixel center distance of high-density indoor LED display continues to make breakthroughs. The pixel center distance of the indoor LED display has entered the 1.Xmm era. In outdoor applications, the improvement of surface-mount LED packaging technology and the improvement of the protection level of outdoor modules broke the 全 of the pixel center distance of the outdoor full-color screen. The limit value of the pixel center distance is constantly refreshed, and the center distance of the pixel is 5.Xmm. Outdoor full-color large screens have been applied in the market. With the LED display entering the "small era", there have been some new trends in industrial development.

Trend 1: Small-pitch narrow pixel LED display will become the mainstream of indoor and outdoor market applications

The small-pitch fine pixel LED display refers to the LED display with the dot spacing below P2.5. It adopts the pixel-level point control technology to realize the state control of the brightness, color reproduction and uniformity of the pixel unit of the display screen. Since 2010, the competition for conventional LED displays has been particularly fierce, and the price war has almost invaded the basic profits of enterprises. As a result, markets in various emerging fields have developed rapidly, and markets such as outdoor media, advertising, outdoor surface mounts, and special-shaped screens have performed brilliantly. Among them, high-density small pitch LED screen displays have become the most concerned products in the industry.

At present, the profit of the small-pitch LED display is relatively rich, and it has great development potential in high-end fields such as monitoring, command, dispatch, and conference, and the future prospect is good.

Trend 2: How to make the current density small is the key to the success of LED display

In the field of lighting, in order to obtain high-brightness lighting products, terminal application manufacturers generally choose to use "high current density chips." However, after the LED display application enters the "small pitch era", the appropriate LED current density is exactly the opposite. This is mainly because in the application of the display, the quality of the product is not more "bright" than who's the screen, but who's screen is more "dark", "dark" to not in the dark environment Eyes cause irritation.

This requirement puts higher requirements on LED devices, because when the current density is as small as 0.3~0.4 amps, how to deal with the relationship between conduction and leakage current of semiconductor devices is a difficult problem.

Trend 3: The application of low current technology puts more stringent requirements on the device package level

As small current chips gradually become the mainstream of the industry, solving the reverse leakage current problem will become the key to the success of display products. The maintenance of the small-pitch display is extremely difficult, which puts higher requirements on the reliability parameters such as current control and anti-static ability of the chip. The reliability of the device is closely related to the packaging technology, so this puts more stringent requirements on the packaging level of the device. At present, the demand for QFN small-pitch packaging in China's mainland market is about a few hundred kk per month, and it is likely to exceed 1000 kk in the future, but the relevant production capacity of mainland enterprises is almost zero. In the long run, QFN technology will gradually replace PLCC technology as the mainstream trend of LED packaging in the future, so packaging companies may rationally enter the field.

Trend 4: The real market for LED displays is to replace a single projection product

From the current status of industrial development, it is unrealistic to hope that LED displays (especially small-pitch displays) will enter the home market and achieve a leap-forward growth rate of more than 100 times. Compared with the LCD screen, the absolute advantage of the LED display is its first-class energy-saving effect. However, there is no absolute advantage in small pixel LED display in terms of user experience and price.

However, compared to the single projection products currently available in the market, LED displays to have great advantages in terms of color, energy consumption and clarity. Therefore, replacing a single projection product will be the key entry point for the future growth of the small pixel LED display market.