Martin Lee of Ledman predicts a new round of growth for COB

Hangjia Info:

Recently, the grandeur co-release of the world’s first PM Glass Substrate Micro LED display by Ledman and WG Tech stirred the industry.


Source: Ledman Official Account


Martin Lee argued that the application of “glass substrate” on Mini/Micro LED has become a new trend with great potential for development, and that Ledman, a 5-year veteran in the field of COB, is ushering in a new round of growth.


The following are part of what Chairman Martin Lee told on Hangjia Info:


Lee said that balance between display effect and cost is crucial for LED display to enter the consumer market. The newly released PM Glass Substrate Micro LED display has made a hit. Prior to that, to combine glass substrate and PM driver in LED large screen display was confronted with challenges. It took Ledman 4 years of cooperation with WG to achieve the technology breakthrough.


This year, thanks to breakthroughs in key processes such as brightness and power consumption, we’ve found that PM+ glass is of commercial value in large screens, and can rival PCB in all-in-one machine, family giant screen and other fields Ledman focuses on.


What is more, glass substrate has higher flatness, making it easier to achieve breakthroughs in chip transfer technology, with the potential to be compatible with smaller chips and cut costs in the future.


Ledman’s all-in-one machine for conference


In other words, it leads to simplified process and dramatically reduced manufacturing cost of Micro LED display.


Micro LED display powered with glass substrate driven by PM is lighter and thinner, featuring high flatness, low power consumption, fast heat dissipation, and high color reproduction. All this makes it a highly cost-effective product with balanced display effect and cost. Suitable for series products and solutions of Ledman such as smart conferences, smart education and UHD family screens, it well responds to multi-scenario needs, including special display, commercial display, home display and other fields, and is in alignment with the C-terminal strategy mentioned earlier. 


Hopefully, this timely-released product can bring to users a better visual experience.


The joint efforts of Ledman and WG resulted in key technological breakthroughs concerning glass substrate, making large-area coverage of hyperfine circuit design structure possible, and completing a series of trial production processes with advanced COB packaging process unique to Ledman.


It is generally believed in the industry that, theoretically, glass substrate is to be combined with the AM drive which, we found, however, makes it harder for mass production. By contrast, directly using a relatively mature PM driver architecture on the glass substrate not only cuts costs more effectively, but speed up the commercialization and marketability of the product.


Additionally, special design of the electronic and electrical structure, while reducing the difficulty of process, effectively reduces manufacturing costs and lay a foundation for the product to enter a broader market.


Packaging technology accounts for about 70% of the COB technology of glass substrate, while display technology accounts for about 30%, representing the integration of interdisciplinary technologies and processes. The technological breakthroughs are attributable to both financial input and profound expertise in technology and process.



As COB ushers in a new wave of growth and scale expansion, it is all the more urgent for LED display manufacturers to roll out more competitive COB products. It is important for Ledman, a display manufacturer valuing technological innovation since its birth, to conduct multiple exploration of application direction as a major task.


In this context, Ledman will continue to seek breakthroughs in product technology and innovation to elevate its competitiveness, and redouble efforts to expand emerging scenes and market segments suitable for COB technology, such as business meetings, smart education, and home giant screen, so as to empower the application market and boost the brand clout.