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What is Ledman “Super-COB” Display Technology?

The Super‐COB display technology, through hardware and software innovation, sees the pixel pitch reduced by 50%, the resolution increased by 4 times, and a balance between the cost and resolution of the display product struck. As regards hardware, the hardware arrangement of the LED chip is changed from the traditional RGB arrangement to RGBG arrangement, by adding a green LED chip according to the theory of spatial color mixing and the visual characteristics of human eyes. On this basis, the combination of sub‐pixel multiplexing technology and sub‐pixel sampling technology, plus up, down, left, and right subpixel multiplexing, produces four virtual pixels, theoretically increasing the

resolution by a factor of four.

As for software, a special optimization algorithm for super‐COB matching RGBG arrangement is adopted to improve display product clarity, reduce color errors, and restore the original image. Super‐COB display technology allows the addition of a small number of LED chips to the structure of 2K products, theoretically realizing the effect of 4K products, with the result that both the amount of LED chips and the production cost of Micro LED display products greatly drop. Ledman’s pioneering breakthroughs in technology have been widely recognized by the industry. In June 2021, Ledman saw its super‐COB display technology win the "2021 ISLE Technology Achievement Award" for its innovation and advancement. Now, the super‐COB display technology has been widely used in a number of Ledman’s COB display products.

What measures has Ledman taken to protect Ledman Super‐COB Display Technology?

In 2020, after several years of dedicated research, Ledman applied for patent protection and computer software copyright protection for the "super‐COB display technology". And the same year saw Ledman obtain the patent certificate and computer software copyright registration certificate from the China National Intellectual Property Administration (CNIPA). In July 2020, Ledman held a press conference to release the "Ledman Micro LED super‐ COB display technology", announcing mass production of the 0.79mm and 0.63 mm pitch Micro LED UHD displays, which are based on COB integrated encapsulation technology and uses super‐COB display technology.

Ledman has applied for super‐COB display technology patents in China and many overseas countries. Thanks to the intensive input in the R&D of LED display technology and extensive patent layout of LED products, Ledman has more than 460 granted and pending patents.

Ledman has reserved a number of patent technologies for pixel arrangement and pixel structure, forming a large patent pool. These technologies, which are key to the smaller pixel pitch, higher resolution, and lower cost of Ledman’s Micro LED UHD display products, play an important role in solving the common problems of high cost, difficult mass production and low yield faced by Micro LED UHD display products in the industry.

What is Ledman's patent layout in LED commercial displays?

In commercial displays, Ledman’s patent layout consists of encapsulation technology, interactive technology, and display control technology, and the patent portfolio covers product appearance, display structure, COB encapsulation, pixel arrangement, screen control, human‐computer interaction and many other aspects.

Ledman has patented several inventions for the function of LED conference displays and the application of screen control.

Specifically, to address the problems that large‐sized Micro LED conference display is beyond the operator's touch range and inconvenient to operate, Ledman invented a series of human‐ computer interaction technologies such as "small touch and large display", solving the pain points.

How does Ledman see intellectual property protection?

"To protect intellectual property is to protect innovation." Here at Ledman, innovation is extremely important

to the company's technological development, and intellectual property is an important intangible asset of the company, the result of the company's technological development, and the crystallization of the wisdom of Ledman people. Ledman has won the "China Patent Excellence Award" twice, and

is a national intellectual property advantage enterprise and an intellectual property demonstration enterprise in Guangdong Province. By far, Ledman has extensively protected its intellectual property from patents, trademarks, copyrights and other perspectives. As an active participant in the development of LED display standards, Ledman respects the intellectual property of others and takes care to protect its own intellectual property.

Only when it is respected by everyone can intellectual property continuously promote the progress of technology, and the healthy development of the LED display industry. Therefore, players in the industry must respect each other's intellectual property in product development and product sales to avoid infringement incidents, and jointly promote the healthy development of the domestic COB display industry.

Ledman, founded in 2004, is one of the world's leading LED UHD display experts, the global lead- er in COB new display technology, the 8K UHD LED display leader, China's first LED display high- tech listed company, and the manufacturer of the Ice and Snow Five Rings that amazed the opening ceremony of the Beijing 2022 Winter Olympics.

Committed to the 8K UHD video industry, with a focus on 8K Micro LED UHD display products based on COB advanced technology, Ledman is a linkage supplier of a full range of LED products and solution ecology. Ledman has ranked first in the market share of LED fine-pitch COB displays.

Since its establishment, Ledman has continued to lead the development of UHD display technology. By focusing on high-tech LED products, Ledman hasdeveloped a full range of LED productecology and solution system, including UHD displays based on COB advanced technology, LEDHUB – AIO Interactive Conference/Education COB LED Display, Ledman LEDPLAY – Household UHD COB Giant Video Wall and LED lighting, and LED creative display.

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