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Talking about the Development Trend of LED Screen Industry Chain and the Evolution of Technology
According to the prediction of LED authorities, the global output value of high-brightness LED packaged devices in 2014 will reach 14.4 billion US dollars. In each downstream application, the proportion of packaged devices for LED displays is 12, corresponding to an output value of about 1.73 billion US dollars, corresponding to about 10.7 billion yuan. It is expected that with the advent of smaller-pitch LED displays, LED display applications will begin to move indoors from the outside, and the application field will be significantly broadened. The high growth rate in the next few years is expected to increase the proportion of LED displays in all downstream applications of LEDs. Under the impact of Chinese enterprises, there are two development directions for foreign LED display giants in the future. One is to transform into channel vendors and integrators, divest manufacturing and purchase products from advantageous enterprises, such as Danish old LED display companies. ProShopEuropeA/S is the way to go. Since 2010, the company has purchased from China's LED display companies. Another way out is to gradually withdraw from the highly competitive and low-margin LED display market, which is also the direction that some foreign companies are considering. LED display industry chain from the LED display industry chain composition, the core components from upstream to downstream mainly include RGB three-color optical chip, full color package device, driver IC, multi-layer PCB board, cabinet kit, display card (send Card/receiving card) and video control systems, etc., involve more related companies. Among all components, the highest cost ratio is the packaged device, that is, the lamp bead. According to the product spacing specification, the lamp bead can account for 20 to 70% of the total cost. The second component is used. The PCB board carrying the lamp bead, the control lamp bead display (shading, gray scale) drive IC, cabinet material, power supply and control system. According to different packaging technologies, the packaging process of LED display bead can be roughly divided into three categories: 1. In-line package: the bracket is used as the main material of the package, one end is a spherical structure for placing the lamp bead, and the other end is a pin. Used to insert on the mold. The in-line packaged device is mainly used for outdoor display products with a pitch of more than 8mm. The advantage is that the brightness is high, and it is easy to achieve waterproof and dustproof. However, the disadvantages are also obvious, and it is difficult to achieve high-density display. 2. Dot matrix package: The LED chips are formed into a matrix, soldered on a PCB board to form a module, and then connected with external devices. The advantages are good flatness, high reliability and excellent protection level. The disadvantage is that the production process is slightly complicated and the material quality is high. Can be used for outdoor display and indoor display, generally used for display with density greater than P3. 3. Surface-mount package: The biggest feature is high degree of automation, can be directly used in SMT high-speed placement machine, and has advantages in the production process of high-density display, so it is mainly used for high-density indoor display. The advantage is that the color consistency is better, but it needs to be strengthened in the degree of protection. The small-pitch LED display screens, which are mainly used in the indoor field, generally use surface-mount packages, because the number of beads to be processed increases geometrically with the pitch reduction, and the surface-mount package can be automated using a high-speed placement machine. produce. As the pixel pitch of the LED display is reduced, the number of lamp beads per unit area is increasing, which makes the proportion of the lamp bead in the whole screen increase. According to our calculations, in the small-pitch LED display P1.9 and smaller pitch models, the cost of lamp beads has reached 70 or more. It is worth noting that the price difference between different levels of components is very large, up to double or even several times. Therefore, the display screens of the same specifications of different enterprises often have different costs and prices, such as the small P2.5 specifications of Liancheng. The distance LED display adopts high-end components such as imported lamp beads and driver ICs. The price per square meter can be twice that of the same specifications of low-end components. At present, among the core components of LED display, the high-end market of chips and packaged devices with the highest technical content is still occupied by foreign manufacturers, and the low-end products belong to the main market of Chinese enterprises; the driver ICs and PCB boards with slightly lower technical barriers The degree of localization is higher. We believe that the mainland LED display industry chain enterprises are rapidly catching up with foreign leaders in terms of both production capacity and technological advancement. With the rapid rise of China's LED display industry chain, the localization of various components is becoming higher and higher. . With the improvement of the technology and production capacity of domestic packaging companies, the localization of packaging devices for LED displays will be promoted in the next few years, which will effectively push smaller products to reduce costs and enter the market, replacing traditional indoor display technologies. With the rapid expansion of market cakes, overseas packaging faucets are also expected to enter the field, forming a benign competition in the packaging device market, promoting technological progress and cost reduction.