Four major trends in LED display: about to enter the "small era"

With the continuous improvement of the overall level of microelectronic assembly technology in China, the pixel center distance of high-density indoor LED display has continuously made breakthroughs, and the pixel center distance of indoor LED display has entered the era of 1.Xmm. In outdoor applications, the improvement of surface-mount LED packaging technology and the improvement of the protection level of outdoor modules broke the å…¨ of the pixel center distance of the outdoor full-color screen. The limit of the pixel center distance is constantly being 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-small-pitch LED display will become the mainstream of indoor and outdoor market applications

The small-pitch 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 display pixel unit. 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, various emerging market markets have developed rapidly, and the outdoor media, advertising industry, outdoor surface mounts, and special-shaped screens have performed well. Among them, high-density small-pitch LED displays have become the most concerned products in the industry.

At present, the profit of 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.

How to make the current density small in Trend 2 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 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 three low-current technology applications put more demanding requirements on device packaging levels

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.

The real market for Trend 4 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 LED display in terms of user experience and price.

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

Micro perspective

Guan Jizhen, Vice Chairman of China Optical Optoelectronics Industry Association: In the innovation of LED display market application, the creative market, small dot product market and advertising media market have become the mainstream; in the field of professional service innovation, control boards, professional engineering services Becoming a bright spot; in the aspect of marketing model innovation, there are many modes such as export-oriented marketing, terminal marketing, channel marketing, and OEM marketing.

Li Jun, Chairman of Liard: There are one or two thousand LED manufacturers in China, and there is a serious overcapacity. The price war will only cause the gross profit rate to drop, killing one thousand and killing one hundred. If you just do OEM, then the lifeblood will always be in the hands of others. In the long run, we must have our own brands in order to create superior benefits and sustainable development.

Li Honghua, Chairman of Silicon Core Electronics: In the indoor market, small-pitch LED display products have a large market space for the replacement of traditional TV wall and rear-projection products. As the density continues to increase, the market for LED displays is becoming wider and wider. At present, small-pitch products have shown strong competitiveness in TV stations, high-end conference rooms, high-end consumer goods, simulation and other places.

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