The smaller pixel spacing is an important index of LED display video wall technology upgrading continuously. The core of realizing this index is the matching packaging device. The emergence of chip 1010 all color devices has opened the prosperity of small space market below p2.0. 1010 has become a star device with no two at once, and has also achieved a number of leading enterprises.
With the development of high density high definition demand, the era of p0.x spacing has come, and mini LED is rising. The packaging forms of different technical routes also began to compete with each other, especially IMD (integrated matrix device) Mini led, cob (chip on board), discrete devices (0606/0404, etc.).
Each technology route has good fields and markets. IMD is faster, better and mainstream in p0.x. After all, what customers need is not only comfort display effect, but also rapid scale of finished products, competitive price potential and dividend to seize market opportunities.
Some people may worry that mini will be replaced by micro. From the pixel pitch above, it can be seen that the application scenarios of mini and micro are different, mini is the concept of large screen, micro is the concept of consumer electronics, so mini and micro will exist at the same time.
Since Mini will always exist, what solution do we choose for mini as a packaging tap? For how the IMD Mini led and cob are introduced, it is analyzed from multi-dimensional.
1、 Fast industrialization capacity
IMD Mini LED manufacturing process and production line equipment layout are similar to discrete devices. Many mature equipment and technologies can be transferred, and the upstream, middle and downstream positioning are clear, and their respective expertise is well done. The small distance market has nearly 10000 kk/ month equipment capacity, which is conducive to the rapid start-up of IMD Mini led from the aspects of process maturity, investment cycle and cost.
Cob packaging technology, manufacturing process and production line equipment layout are very different from SMD enterprises. It is necessary to integrate upstream chips, SMD and downstream display screens. The whole industrial chain involves the breakthrough of core technology difficulties, which requires longer time and higher cost, which restricts the manufacturing and supply of large-scale models.
Moreover, the control of cob yield is very difficult, the closer the spacing between points, the higher the requirement for the bad rate. To reach 6 δ（ The level of Six Sigma requires long-term system input and basic skill training, which is difficult to achieve in one step. If the level is too low, it will increase the cost and difficulty of delivery seriously.
2、 Show consistency
Display consistency is the core index of consumer display devices, which is reflected in the wavelength, brightness, color matching and appearance consistency of black screen.
IMD Mini led continues the mature separation technology with small spacing, which can select the wavelength and brightness of the device. The devices from different moulds are evenly distributed before tape coding, which effectively avoids the local color difference after the board is pasted due to the slight difference in packaging. Therefore, the color consistency is better and the perfect effect is presented.
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