COB Mini/Micro LED Display Technology Development In 2022
August 21, 2022
COB MINI/MICRO LED DISPLAY TECHNOLOGY DEVELOPMENT IN 2022
As we know, the COB (Chip-on-board) display has the advantages of super-high contrast, higher brightness, and a wider color gamut.
In the process of developing from small pitch to micro pitch display, the original SMD package has been difficult to break through the limitation of smaller dot pitch, and it is also difficult to guarantee higher reliability and protection. Micro pitch display requires COB technology to support the development of micro pitch display whose pixel pitch is less than P1.0mm.
The COB display adopts the flip-chip packaging process, which has a shorter heat dissipation path and is more conducive to heat conduction compared with the normal SMD technology display.
With the continuous maturity of COB surface treatment technology and chip mixing technology, LED display products using flip-chip chips smaller than 100 microns will be more promising display products in the future.
P0.9 COB Mini/Micro LED Display is a mature product, that has been mass-produced
In 2019, the mass production capacity of displays below P0.9 is still relatively limited. On the one hand, the market demand is relatively limited, and the supporting capacity of the industrial chain is also insufficient.
By 2021, with the advancement of packaging technology, the improvement of efficiency, and the rapid cost reduction of LED chips, etc., the demand for products below P1.0 will gradually become a popular market, and Mini LED products will also penetrate the high-end market to the mid-to-high-end market, from professional display to the commercial display and then to the civilian field, it has changed step by step.
By 2022, in terms of packaging form, whether it is COB, four-in-one, or two-in-one, it is not a problem for the supply of P0.9mm diode devices, and both production capacity and yield can be guaranteed.
However, due to price factors, from the current small-pitch market, the product market of P0.9 is still relatively concentrated in some conferences, command and monitoring room projects of the government or large state-owned enterprises, and P1.2-P1.5 are still the mainstream of the small-pitch market. .
But this situation is improving, and the application scenarios of P0.9 Mini direct display products are constantly expanding.
The pitch around P0.7 LED display will become the mainstream of the next generation.
P0.7mm can get 4K resolution for 100-200 inches screen
The size between 100-200 inches is a new huge potential application market for small-pitch displays.
Because the market above 200 inches is already occupied by traditional P1.2~2.5mm small-pitch LED displays, and the slightly smaller size is mainly 98-inch LCD TV products, the current minimum price is less than 3,000 USD, and the display effect is also relatively good. The fine pitch LED display is difficult to compete with LCD in 98-inch market.
However, the display size of the LCD screen is difficult to break through the 100-inch limit. The traditional competitors for 100-200-inch displays are mainly projection displays—however, fine-pitch LED large screens have better visual performance under brighter “light conditions.”
Most of the 100-200-inch markets include conference rooms, commercial, advertising, and other scenarios, which require better lighting conditions.
And in the 100-200 inch market, small-pitch LED displays also face the need to compare PPI resolution with LCD displays.
Because the 100-200-inch application corresponds to the nearest viewing distance of 3-7 meters, or even closer viewing distance. The closer viewing distance ensures the picture quality effect, but also requires “higher PPI resolution”, that is, requires a smaller pixel pitch.
Simply put, 75-98-inch LCDs have already achieved 4K resolution; the resolution of 100+ high-definition LED screens cannot be too bad.
The P0.7 indicator can provide 4K resolution on a 120-inch+, which is exactly the resolution of the current mainstream audio-visual applications and is larger than a 98-inch LCD.
In this regard, an analogy is that the current pixel pitch of mainstream LCD TVs is between 0.3 and 0.57 mm. It can be seen that the small-pitch LED screen spacing of P0.7 mm can better connect the application experience of LCD monitors, and provide differentiated products in larger sizes of 100-200 inches.
Therefore, from the market demand for size and resolution, it can be seen that P0.7 will become the next-generation mainstream indicator for micro-pitch LED screens.
But the development of P0.7 100-200 inch display market needs better prices now. In this regard, small-pitch LEDs are increasingly achieving results through continuous accumulation of experience and gradual product process improvement. Especially in the past three years, P0.9 products have achieved a certain success in the high-end market, and the price has dropped by about 30%. Industry analysts believe that P0.7 products are expected to be at the same price as earlier P0.9 products.
The industry expects that in the next two years, the upstream industry chain of LED displays including mini LED chips, etc., will be greatly improved, and the level of product technology and manufacturing process will also be significantly improved. The industry market is facing a round Possibility of price reduction. This is also a “favorable time” for the layout of a new generation of “P0.7 pitch” products.
The 100-200-inch application is a typical “new scenario” that tests industry technology and cost control.
Of course, different companies will also make adjustments in order to highlight their own product advantages: for example, in order to reduce costs and difficulties, manufacturers can provide 136-inch 4K products with a slightly larger pixel pitch; or provide 4K resolution for smaller size products, such as Samsung The Wall uses a 0.63mm pitch.
What are the challenges of P0.7 pitch display?
The first is cost. But it is not the biggest challenge.
This is because the P0.7mm must be a high-end display, and it is those customers who demand performance as the priority. This is just like any generation of small-pitch LED products that are “cut into the high-end market” and quickly gain market recognition. From the perspective of cost, it is not very difficult for P0.7 displays to start expanding in the high-end market at the beginning.
Unmature production technology
Compared with P1.0, the number of components per unit display area of P0.7 is doubled. However, although it is possible to inherit the technical experience accumulated by the previous P0.9-P1.0 products, it also requires new challenges to unknown difficulties. The industry is still in the early stage of mature technology to truly efficiently manufacture P0.7mm display products.
Slight different pitch, no standard
In addition to cost and production process technical challenges, another challenge for P0.7 products is that spacing is difficult to standardize.
The 100-200-inch application is often an “all-in-one screen” rather than a splicing project, which means that LED large-screen companies need to find the most conventional “application size requirements” and combine them with technical capabilities to form something similar to: 4K resolution , 120 inches, 150 inches, 180 inches, 200 inches and other fixed unit sizes, but the pixel pitch density is different.
As a result, the seemingly similar 110/120/130-inch units need to use a “dynamically adjustable process technology structure” that fluctuates with the P0.7 pitch standard.
Facing direct competition from traditional commercial LCD or projection suppliers
In addition, in the micro-pitch LED display market between 100-200 inches, small-pitch LED screen companies also need to face the challenges of competition from companies that use traditional LCD commercial large screens as their products.
In the previous small-pitch LED market, LED large-screen companies competed with their peers, but now they need to expand the scope of competition to almost the entire commercial display market. It even has to face the competitive pressure of TFT-MINI/MICOR LED products launched by BOE and Huaxing Optoelectronics.
Related COB Display Suppliers
Samsung launched a new The Wall in 2022, including a 110-inch 4K Micro LED TV set and an 8K 220-inch giant screen.
The whole 110-inch Micro LED TV uses a P0.63 ultra-small pixel module board in a full flip-chip COB package. The screen resolution is ultra-high-definition 4K, the brightness is 800 nits and above, and the color gamut value is 120%. The thickness is only 24.9mm.
The 8K 220-inch giant screen is composed of four 4K 110-inch panels.
The Wall uses Micro LED technology, which also has the characteristics of self-illumination. The peak brightness of this TV can reach 2000 nits, the white tone is brighter, the black is deeper, and the natural color is more realistic. Samsung provides 0.63 and 0.94 Two pixel options are available.
The refresh rate can reach up to 120Hz, supports HDR10, and HDR10+, and the maximum brightness is 2000 nits. In addition, the Micro AI processor built into 2022 The Wall TV supports 20-bit color depth, can analyze every second of content in real-time, and optimize image display quality while removing noise.
Back in 2018, Samsung unveiled a giant 4K TV called “The Wall” at CES. Based on Samsung’s latest MicroLED screen technology, it measures up to 146 inches and is designed for movie theaters. Its biggest highlight is not the 146-inch Micro LED screen, but “modularity”.
On June 30, 2022, Leyard’s new product global launch conference officially released the “Lead Black Diamond” series of Micro LED technology and new products.
The world’s premier Leyard Black Diamond Diamond series products apply the most advanced Micro LED display technology. The products cover P0.9-P1.8 new products, as well as Nin1 Micro LED display products below P1.0, covering 80% indoor Small pitch products.
This series of products adopt the most advanced Micro LED full flip-chip and packaging technology, with high stability and high reliability (to solve the problem of caterpillars), the contrast is increased by 3 times, the brightness is increased by 1.5 times, the uniformity is better, and the energy Comprehensive technology and product advantages such as lower consumption and higher cost performance (close to the price of gold wire lamps).
At the same time, Leyard successfully overcame the bottleneck of the huge transfer cost below the micro-pitch P1.0, launched Micro LED display products with extremely high cost performance, and pushed the Micro LED product line from high-end applications to the inclusive market (micro-pitch to small-pitch, Indoor to outdoor) to achieve comprehensive coverage of the product. In the future, COG, POG, and MiP products will also meet with you.
Under the influence of multiple factors such as yield improvement, smooth industrial chain, increased channel promotion, increased brand recognition, and the joint promotion of global manufacturers, Leyard Micro LED industrialization has accelerated, mass production efficiency has improved significantly, and product cost A sharp drop, breaking the price war pattern.
On June 8, 2022, Cedar Electronics launched the world’s first full-flip-chip COB magic crystal series products and world-class obsidian series products in Guangzhou. This conference brought together the latest technological achievements of flip-chip COB, and new powerful new products such as the phantom series and obsidian series launched by Cedar Electronics were all unveiled – 75-inch 4K Mini LED direct display super TV, 55-inch standard display resolution 4* 4 splicing screens, 130-inch 4K smart conference all-in-one machine, 138-inch 4K smart touch all-in-one screen, new obsidian 0.9mm pitch 2K display, etc.
The Phantom series is a blockbuster product launched by Cedar Electronics in the field of “green ultra-high-definition” display. It integrates a number of reliable designs, adopts a large-size light-emitting chip, and has a surface light source display, which effectively reduces light radiation and suppresses moiré. . This series of products has four product forms: LED 55-inch, 60-inch, 65-inch standard display unit, 4K conference all-in-one machine, 4K super TV, and standardized display panel. And “pixel multiplication” technology, can present richer image information to users, greatly improve the content perception experience, and achieve precise control of comprehensive costs through lean production. At present, the Phantom series has achieved P0.4-P1.2 micro-pitch COB mass production and supply, 4K/8K ultra-high-definition resolution coverage and higher resolution expansion, 55-inch-330-inch full-size layout, the product is released It marks that Xida Electronics has entered the mass production stage of “micro-pitch ultra-high-definition products” ahead of the industry.
Ledman released 110-inch/138-inch Ledman giant screen series products suitable for home use in 2021, and released 163-inch products in 2022, actively deploying Micro LED consumer-grade home display track.
On April 16, 2022, Ledman brought 138-inch and 165-inch ultra-high-definition giant screen products to Yitian Holiday Plaza, OCT, Nanshan District, Shenzhen. This is also the world’s first exhibition of LEDMAN’s giant screen offline pop-up store.
ABOUT AVOE LED
AVOE LED Display is a leading custom-solution-based led display manufacturer located in Shenzhen, the developing and manufacturing center of high-end led displays.
We are devoted to using new technology to rich the display lines and give more value to our clients to help them win the market. AVOE LED Display is finding a good reputation for COB display modules and making finished COB display products for our customers’ bespoke projects.
We have started mass production of COB P0.9mm / P1.2mm/ P1.56mm 16:9 600:337.5mm small pitch displays, 4K 163-inch all-in-one screen, and P0.78mm and P0.9375mm Mini 4in1 600: 337.5mm standard displays.
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