No. 1 in the industry, Unilumin COB is self-developed, produced and sold
Throughout the development of the entire display LED industry, LED, DIP, and SMD packaging have always been the mainstream choices in the industry. Currently, with the continuous breakthroughs in point pitch, new packaging technologies and process methods such as IMD, MIP, and COB have emerged one after another. In the micro scenario of 0.4 to 1.8 pitch, Mini/Micro products based on COB packaging will become the mainstream choice in the market.
At present, the main technology paths for the trend of small-pitch LED displays in the industry are COB and SMD. Within the pixel pitch of P1.0, the technical advantages of COB are more prominent. With the cost optimization brought by the increased yield rate, the share of COB is increasing rapidly. According to DISCIEN forecast data, it is expected that the share of COB in the domestic small-pitch LED display market will be close to 25% by 2025.
It is reported that Unilumin started pre-research on COB technology in 2012 and carried out research and development of process materials; in 2016, it launched special research to realize the commercialization of the technology; in 2018, it launched the industry's first COB The encapsulated MiniP0.9 product has been mass-produced and commercially available; in 2020, Unilumin launched the patented technology of EBL+ multi-layer optical film packaging, combined with common cathode cold screen technology, to break through industry problems such as ink color consistency and heat dissipation of COB products; last year, Unilumin took the lead in releasing Micro0.4 products and achieving mass production.
At the press conference, Huang Xiongbiao of Unilumin Technology said: "2023 is the first year for the application of Unilumin's COB products in all scenarios. Unilumin's Mini/Micro technology based on COB technology has taken the lead in achieving full coverage of application scenarios. Currently, Unilumin has six major product series with full coverage, which can meet the application needs and application markets of different customers, including UMicro, Umini III Pro, UMiniⅢ, UMiniW, and Lamp’s LMini and outdoor COB products. Among them, Unilumin UMicro products are equipped with quadruple energy-saving technologies. They are the first COB products in the industry to obtain carbon neutrality and carbon labels, and are unanimously recognized by the market. ”
Unilumin’s Mini/Micro technology layout: two cores, five supports, and one platform
In Mini/Micro. In terms of COB technology layout, Unilumin uses its Mini/Micro Research Institute as the base, focusing on the two cores of mass transfer yield and fully automated production process, to form five major process supports of full flip-chip, substrate, packaging, driver, and system.
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●In terms of chips: Unilumin's full range of Mini/Micro products adopt full flip-chip RGB Micro-level chip COB packaging technology and are equipped with self-developed die-bonding hybrid algorithms, which not only improves product consistency and uniformity, but also ensures die-bonding efficiency.
●In terms of substrates, Unilumin adopts the HDI M-SAP process, which not only achieves higher pad size accuracy, but also improves the chip bonding process window, which can largely solve the problem of module color cast in the industry.
●In terms of packaging, Unilumin uses Unilumin’s self-developed EBL+ multi-layer optical processing technology to present the ultimate pure black with no reflection when viewed and no traces when touched; at the same time, through upgrading of Molding materials/processes, the viewing angle problem is completely solved.
●In terms of driving, Unilumin supports low-gray correction with high-precision 3ns pulse width through EDL+ driving technology, which can achieve higher dynamic contrast.
●In terms of system, Unilumin’s full range of Mini/Micro products are automatically adapted to Unilumin’s own UOS system, with high color reproduction and fine display.
In addition, Huang Xiong of Unilumin Technology stated: "In view of the yield problems of COB, the massive transfer technology applied by Unilumin can steadily improve the efficiency and yield of COB. In terms of maintenance, Unilumin adopts fully automated repair, AOI automatic identification of dead pixels, and completes repair and delivery in the fastest 48 hours, meeting the needs of customers to the greatest extent."
Strong intelligent manufacturing capabilities, Mini/Micro Increasing COB production capacity
COB, as a new type of display technology, has been upgraded and improved in many aspects such as resolution, energy-saving performance, and environmental protection performance. In the future, as COB display technology gradually matures and its cost performance improves, the penetration rate of the small-pitch LED display market will continue to increase, and it will expand to commercial displays such as corporate conferences, advertising media, and home display application scenarios such as home theaters. This will be a market worth hundreds of billions.
To this end, Unilumin has closely followed the industry's cutting-edge technology and established professional COB, MIP, module SMT, screen-joining aging workshops and fully automated smart warehouses in its world's largest LED display intelligent manufacturing base - Daya Bay Intelligent Manufacturing Base. It not only automates production from LED display modules and cabinet assembly to safety testing, but also realizes logistics automation from raw material receipt, lineside distribution to finished product delivery, gradually realizing "digital manufacturing" and building a lighthouse factory in the LED industry.
With strong technology research and development and intelligent manufacturing capabilities, Unilumin's Mini/Micro COB production capacity has gradually increased. It is the only LED display company in the industry that has a full process flow, a full range of product forms, leading production capacity scale, and wide application coverage. In the future, Unilumin will continue to lead the industry in the future of micro-pitch displays with high-end intelligent manufacturing.
ANNA