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cob led technology

COB LED Technology Powers LED Screens Toward Smaller Pixel Pitch

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LED display screens are undoubtedly the best solution for commercial displays today. A large number of LED beads are mounted in a dense arrangement on the panel to produce images by emitting light. And the distance between each tiny LED bead on the panel is called pixel pitch. As we all know, the smaller the pixel pitch of LED display screens, the higher the resolution and the higher the picture quality presented.

The demand for ultra-high definition displays (UHD) rises in recent years due to the rich image detail and immersive viewing experience they provide, especially when viewed at close range. For enterprises, UHD displays exert great influence in the clear and distinctive presentation of the corporate image and product details, which plays a positive role in business development. There is no doubt why Micro LED and Mini LED, the display terminals that provide UHD images, are the wind vane of future display technology.

COB LED displays

Small pitch LED displays are starting to surpass the maximum resolution of UHD panels in the LED display industry. LED display screens with pixel pitches below 1 mm are gradually making their way from the high-end market to the mid-to-high-end market thanks to ongoing advancements in LED packaging technology, significant improvements in packaging efficiency, and a development trend of rapidly decreasing LED chip cost.

At the annual conference for Integrated Systems Europe (ISE) 2023, the P0.3 LED display screen made its debut. Due to the extremely small pixel pitch, the P0.3 LED display can reach a resolution of 6,547,622 dots per square meter and still have a high brightness of 1200 nits. 

The debut of the P0.3 LED display screen demonstrates both the advancement of fine-pitch LED display technology and the inevitable trend toward Mini LED or Micro LED as carriers for ultra-high definition displays.

The COB LED packaging technology, which has steered the LED display industry in the direction of ultra-high resolution displays and is a crucial element in obtaining decreasing pixel pitches in LED displays, is credited as one of the reasons for the successful debut of P0.3 LED screens. 

So, what is COB LED, and how can COB LED technology reduce the pixel pitch in LED displays?

COB (chip-on-board), is a new LED packaging technology that mounts LED chips rather than LED beads directly on the Printed circuit board (PCB).

application of COB LED displays

 

  • High-density array of LED chips

 

Because each LED chip is exposed, i.e., there are no lead frames, phosphor coatings, or lenses, they can be arranged and mounted very closely on a single COB LED module. Such a high-density array allows COB LEDs to produce more light output and greater light uniformity from the same area that a standard LED module might occupy. 

For example, COB LED technology can produce 38 times more LEDs on a 10mm x 10mm square PCB compared to DIP LED technology, and 8.5 times more LEDs compared to SMD LED technology. With COB LED technology, P1.2mm, P0.9mm, P0.6mm, P0.5mm, and even P0.3mm LED display screens can be achieved.

 

  • Fewer components 

 

The reduction in the number of parts required to operate the LED chips is another significant benefit of employing COB LED technology. Instead of the lens and other standard components of an LED package, COB LEDs power the multiple diode chips they house using a single circuit with only two connections. Each LED chip in this case produces less heat and has a lower failure rate thanks to the fewer components and removal of the conventional LED chip structure packaging.

 

  • Lower failure rate

 

The ability to limit the pixel failure rate to 1-9 pixels within 1 million display pixels is another feature of COB LED technology’s low failure rate. The current standard SMD LED technology in the display industry can only control the pixel failure ratio to one in 10,000, which is far from being able to meet the requirements of small-pitch LED display screens for ultra-high definition display.

We are all aware of the benefits of COB LED displays, including their extremely high contrast ratio, increased brightness, and wider color spectrum. Long-term improvements in COB LED display efficiency, current density, and lamp bead stability are possible thanks to the prospect of smaller pixel pitches, a more straightforward packaging technique, and good heat dissipation performance. This will encourage the ongoing development of Micro LED display screens.

In addition to assisting the display industry in its transition to the UHD age of p0.Xmm, COB LED technology also creates a new environment for creative, forward-thinking uses of LED display screens. Future XR and meta-universe applications will be continuously and thoroughly integrated with COB LED display technology. It keeps tightening up its specifications for the unit display area resolution level and other information-carrying capacity indications. Future high-end display applications for COB LED technology will be built on the cutting edge of ultra-micro pitch technology.

RIGARD small pitch LED screens

 

The secret to unlocking the enormous potential for future UHD display development is the specialized market for narrow-pitch display technology. You can consult for RIGARD narrow pixel pitch LEDs if you are looking for Mini LED screens or even Micro LED screens. We have a sizable market share in many different kinds of small-pitch LED displays thanks to our mastery of COB technology. Moreover, RIGARD fine pitch LED displays can offer you excellent image quality, and consistent and accurate color performance with refresh rates up to 3840 Hz, and brightness levels of 4000 nits. 

Want to learn more about COB LED technology and small-pitch LED display screens? RIGARD will be pleased to assist you if you contact us right away!

gob led display screens

What is GOB LED Display Technology?

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LED packaging technology is constantly being improved in response to the increasing demand for small pitch LED screens, such as Mini LED and Micro LED, that can deliver ultra-high quality image display. 

Due to its inherent deficiencies in protection and point source display performance, the initial SMD technology is no longer able to fulfill the application of all scenarios. COB technology, as a newcomer, has not yet achieved mass production due to high technical costs, poor color separation, and the inability to mix lights. In this context, the GOB LED display technology, which has been improved from the SMD packaging process, has come into being.

零售商的透明 LED 屏幕

SMD vs COB vs GOB LED Technology

● What is SMD LED Display?

Surface Mount Device, often known as SMD, is the packaging of lamp cups, brackets, chips, leads, epoxy resin and other materials into different sizes of LED beads, which are then directly soldered on printed circuit boards (PCBs).
Due to the lack of protection on the surface of SMD-packaged LED screens, the lamp beads are exposed to the outside environment, which raises the danger of color shift, the failure and damage of LED beads.

● What is COB LED Display?

By encapsulating the LED chip directly on the PCB rather than the LED lamp, Chip on Board (COB) is an advancement of SMD technology that lowers the potential risks that SMD LED displays may have. However, because of the high technical cost and the challenge of maintaining color uniformity and chromatic aberration, COB LED screens are currently difficult to mass produce.

● What is GOB LED Display?

Glue on Board (GOB) is a new revolutionary packaging method that outperforms SMD technology by using glue on the PCB to encapsulate the LED modules. Essentially, GOB LED display technology is an analog of module packaging. It uses a proprietary transparent epoxy adhesive applied to the surface of PCB modules that have been soldered with thousands of SMD lamps to form a special shield. GOB display technology provides a solution to the LED beads protection.

The highest benefit of GOB LED displays over SMD is the high level of protection for the LED beads, which enables LED screens to adapt to any challenging environment and attain true moisture-proof, water-proof, dust-proof, impact-proof, and UV-proof properties. In contrast to the high-cost COB technology, GOB LED display not only achieves mass production at a lower cost but also successfully addresses issues like poor surface flatness, poor color separation and inability to mix lights of COB.

gob led显示屏

Advantages of GOB LED Display

  1. Superior Durability – waterproof, moisture resistant, dustproof, shockproof, UV resistant

Splashing water, moisture, or dust can easily enter and gather in the gaps of the LED module if the surface is left untreated and exposed to the outside environment. In addition to lowering the quality of the image display and making it more difficult to clean the LED display, this will also make the LED chips or beads more prone to damage. What’s worse, the LED chip is susceptible to accidental collision damage while being handled, which will result in display malfunction across the LED display screen. 

The transparent epoxy adhesive on the surface of the GOB LED displays can effectively shield the LED chips or beads from any harsh external elements like water, moisture, dust, and UV radiation. Moreover, the high density of the glue makes the GOB display screen shockproof, greatly reducing the risk of potential breakage due to collision during installation and delivery.

  1. Excellent thermal conductivity extends service life

In addition to superior transparency, GOB LED display screens also have excellent thermal conductivity, which means that the heat generated by the LED units drains more quickly, significantly prolonging the life of the LED display.

  1. Cost-effective

GOB LED displays are more reliable and durable than traditional LED display screens, which results in a longer lifespan and lower maintenance costs. As GOB LED display screens don’t require as much maintenance and replacement as traditional LED displays, they are more economical.

  1. Maintain superior image quality

The brightness, color, or clarity of the image displayed by the GOB LED display screen is not diminished, even better than the conventional ones, as a result of the superior transparency of the glue on board.

  1. Easy to install

GOB LED displays are easier to handle and quicker to install since they are coated by a clear epoxy adhesive, which makes them less brittle.

  1. Easier to clean

Because of the clear epoxy covering the surface for smoothness, the cleaning of GOB LED display screens is quick and simple with a soft cloth and light cleaning agents. Furthermore, GOB technology shields the LED units from harsh cleaning products.

  1. Wide range of applications

The flexibility and versatility of GOB LED display solutions is unparalleled. Since GOB LED display technology combines the advantages of traditional SMD and COB, while compensating for their shortcomings. GOB LED displays can be used in a variety of scenarios, such as small pitch LED screens, rental LED screens, etc., driving revolutionary changes in the entire LED display industry.

Application of GOB LED Display

  1. Fine Pitch LED Display Screens

The continuous development of the narrow pixel pitch LED display market has taken GOB technology to the next level. Each LED bead or chip in fine pitch LED display screens is spaced closer together and more densely throughout the PCB. The display industry of today has made it possible to produce LED screens with pixel pitches less than 1mm and pixel pitches between P1.2 and P2.5 are already in mass production.

The tiny LED beads and LED chips are easily damaged during shipment, installation, and operation with such a small pixel pitch. GOB LED display technology is the perfect solution to this problem, as the glue on the board protects the LED beads or ships well, which can be used for smaller pixel pitch LED display screens.

会议室用小间距 LED 屏幕

With the aid of cutting-edge GOB LED display technology, RIGARD, a specialist in fine pitch LED display solutions, has been able to produce and manufacture LED display screens with smaller pixel pitches, such as P1.2 LED displays. In fact, we provide P1.2, P1.5, P1.8, and P2.5 LED displays for indoor and outdoor UHD applications, depending on the various needs of our users, which are intended to give your audience a dazzling visual feast and significantly advance your business.

  1. Rental LED Screens

The rental LED screens that are set up on the stage require regular installation, disassembly, packaging, and movement, as we are all aware. In this case, it is challenging to prevent damage to the LED lights from unintentional impacts, even with the highest quality and most expensive LED display screens. It also raises maintenance costs because they need frequent repairs if damaged. However, with GOB LED display technology, Rental LED display screens can be well-protected and maintenance expenses can be reduced.

RIGARD is a reputable name in rental LED screens as well as a full-service provider of LED display solutions. With GOB display technology, our P1.5, P2.6, and P2.9 LED displays have successfully delivered flawless image displays for thousands of stage displays around the world, resulting in effective cost savings and business growth.

  1. Transparent LED Screens

In commercial settings like retail stores, malls, and nightclubs, transparent LED display screens are becoming more and more common. Transparent displays utilize extremely small PCBs in order to achieve high transparency while keeping high resolution, making the lamps and PCBs exceedingly brittle and susceptible to damage. GOB display technology provides protection for the entire hollow module of transparent LED screens, lowering the chance that the screen would be damaged in a collision. 

  1. Flexible LED Screens

Today, a variety of curved and cylindrical LED video walls are produced using flexible LED screens. GOB LED display technology can boost the reliability of flexible LED display screens by shielding them from moisture damage and scratches, even if the installation is often fixed.

  1. Floor LED Screens 

Typically, there is a layer of acrylic cover on the surface of floor LED screens for interactivity to prevent stepping on. However, the acrylic cover has poor light transmission, which has an impact on the visual effect. The floor LED display can be best protected from being trodden on by GOB display technology, which not only offers greater light transmission and visual effect but also has waterproof, shockproof, and dustproof features. 

On the other hand, there are gaps between the LED beads, the traditional floor LED for interactivity will show grainy pixel dots, which negatively affects the interactive experience. By changing the display screen from a point light source to a surface light source, GOB LED display screen may produce a more uniform luminescence, UHD display, and wider viewing angle.

  1. Irregularly shaped LED Screens

An irregular shape of the LED display screen is typically needed to build a special ambiance in clubs, pubs, casinos, and other locations. These locations are packed though, so collisions, spilling food or drinks on the display screens are bound to happen, all of which could harm the LED display screen. Due to its shock, water, and moisture-resistant properties, GOB LED display technology shields irregularly shaped LED displays from potential harm brought on by pressure, water, food, etc.

As an innovative LED packaging technology, GOB LED display breaks the barrier of traditional SMD LED display and adds more vitality to the LED display market by virtue of lower cost than COB LED display towards smaller pitch display.

If you are looking for small pitch LED displays encapsulated by GOB technology, do not hesitate to contact RIGARD. As an expert in LED screen technology and integrated LED solutions, RIGARD keeps up with the industry trend and masters the most cutting-edge GOB LED display technology to break through the technical barriers of fine pitch LED display screens in order to help your business development.

What is IMD LED Display and Difference Between IMD and COB Encapsulation?

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In recent years, the popularity of 5G network, the upgrade of digital services, the application of conference visualization, the in-depth practice of smart cities and the continuous expansion of the security monitoring market stimulate the development of HD display market segmentation. HD display, which is being upgraded from 4K display to 8K display, is gradually becoming the development vane of the current display technology.

Small pitch display technology is the key to making this market segmentation with great future possibilities. The current LED display industry has broken through technological innovation and can produce LED displays with pixel pitch less than 10mm. Since its introduction, the small pixel pitch LED video wall has become the most popular display solution in the indoor display market with its advantages of high brightness, high resolution, high gray level and high contrast, widely used in conference rooms, lecture halls, government service centers, etc.

As the size of LEDs gets smaller, the ability to pick up and accurately place it becomes increasingly difficult. The challenges of packaging technology contribute to high cost, making small pixel pitch LED video walls still have a long way to go to achieve mass production. The LED display industry has been looking for newer ways to reduce costs and allow for smaller pixel pitches.

Historically, LEDs were diced from epitaxial wafers, placed in surface-mount packages, wire-bonded at the appropriate location, and encapsulated in epoxy or silicon, which is known as SMD technology. The changes in the way LEDs are packaged can be described as a new packaging technology that packages the LED chip, rather than the LED lamp, directly onto the PCB, known as COB.

In the past few years, SMD and COB technologies have been dominating the small pixel pitch display market. We have also always heard opinions about COB winning over the traditional SMD with various technical advantages. However, to this day we find that the most popular solution for small pixel pitch LED displays represented by P0.9 LED displays is neither SMD nor COB, but IMD.

What is IMD LED Display?

IMD (Integrated Matrix Devices) refers to the packaging of two, four, six or more groups of RGB diodes in a small unit, also known as “N-in-1”. Typical IMD models are generated as 2*2 or 4-in-1 packages, where each 4-in-1 package includes four SMDs and each SMD includes three chips (red, green, and blue).

IMD is an intermediate product between SMD and COB, combining the advantages of both. IMD is a new generation of LED packaging technology that meets the current market demand in terms of both appearance and performance.

Differences between IMD and COB/SMD

Higher reliability and protection performance

LED display screens must be transported over long distances to reach the client, and they will inevitably be bumped during the process of installation to put into use. Therefore, the protection of LED display screens is one of the important factors considered by LED display manufacturers and the rental market. As both IMD and COB are using integrated packaging technology, the hermeticity and reliability have made a qualitative leap compared with the traditional SMD, meeting the requirements of customers at this stage.

Smaller pixel pitch

SMD technology has physical limitations that make it the best solution to produce LED displays with a pixel pitch close to 1.2mm. Further reduction in pixel pitch would result in high costs. IMD technology, on the other hand, can achieve mass production of smaller pixel pitch LED displays, such as P0.8, P0.6, P0.4 LED screens, in a short period of time and at a very low cost.

 More stable color consistency

IMD inherits the long-accumulated sorting technology of SMD, which makes it have good color consistency in display effect compared with current COB, without the problem of poor appearance and lighting uniformity. Although COB has also improved in color consistency, it is not as stable as IMD, and sometimes there are batches of errors. To reduce this risk, COB usually uses fixed chips for chip bonding. However, this approach does not guarantee that the optoelectronic parameters of all LED components are within a reasonable range after repair, which requires engineers to perform point-by-point calibration. As a result, COBs cost more than IMDs to achieve the same level of color consistency.

Lower maintenance costs

Controlling costs to create more value for downstream customers is essential. When a local area of the LED display screen is damaged, LED screen with IMD technology only need to remove a single damaged point for maintenance, while those with COB technology need to remove the entire LED module for maintenance, which undoubtedly increases maintenance costs.

All in all, IMD offers better crash protection and more possibilities for smaller pixel pitches than conventional SMD. Compared with COB, IMD has higher color consistency and lower maintenance cost, especially when only a single diode needs to be repaired. IMD combines the advantages of traditional SMD and COB to properly solve the problems of damage protection, black level consistency, seamless stitching, light leakage, and maintenance. With higher contrast, higher integration, easier maintenance and lower cost, it is the ideal technology for the evolution to finer pitch.

With the above information, you may notice that IMD technology is superior to COB and SMD technology for small pixel pitch LED displays. If you are looking for small pixel pitch LED displays, Mini LED displays, or even Micro LED displays, you can refer to RIGARD’s narrow pixel pitch series. We have a global reputation for gaining significant market share in many types of small pixel LED displays with our mastery of IMD and COB technologies. Need more information about these small pixel pitch LED screens and IMD technology? Contact RIGARD immediately and we will be happy to assist you!

Ten Keywords Reveal Future of LED Display Screen in 2022

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LED display screen initially became the most popular advertising carrier for advertisers in the new media era because of its vivid colors and clear images, which provided the audience with stunning visual effects and maximized the commercial value of media advertising. But with the rapid development of science and technology, the traditional media advertising and information dissemination form has not been able to meet people’s needs, and the digital and virtualized industry began to emerge. Therefore, there are huge opportunities and broader business possibilities in the future of the LED display market. This article will walk you through the future trend of LED display screens in 2022 with 10 keywords.

1. 5G+8K
The development and popularity of 5G communication technology have once fueled the heat of discussion in the UHD video industry, especially since 8K display technology has extended rich applications that greatly enhance the sense of immersive experience for audiences, making 8K displays to be the main development direction in the coming years. Some national television broadcasters have also made clear regulations on the display technology of 8K screens. Not only that, in the Opening Ceremony of 2022 Beijing Winter Olympics, China’s National Stadium was customized with the world’s largest LED screen that can present more than 8K resolution, bringing a stunning visual feast to the world through the perfect integration of technology and aesthetics. These have not only pointed out the direction of LED screen panels in the development of the high-definition display industry but also accelerated the transition from 4K screen to 8K screen and the pace of application of 8K screens in all kinds of high-definition display scenes.

2. Mini LED and Micro LED

With the exploration of LED pixel pitch and increasing demand for high-definition displays in recent years, LED screen manufacturers began to explore UHD display effects, which is why Mini LED and Micro LED technology has always occupied a place on the list of hot topics in the past two years. Mini LED refers to the use of LEDs smaller than 0.2 mm to produce light, and Mini LED displays are mostly used for backlight displays mounted on TVs, computers and cell phones, and other screens. For the time being, Mini LED technology has just achieved mass production and requires further development of the application.

Micro LED, being different from Mini LED display, is the evolution of OLED. That is, Micro LED is the use of smaller, brighter single red, green and blue LEDs to emit color light directly. Compared to Mini LED display, Micro LED display is still in the stage of achieving breakthroughs in mass production, and further technical upgrades and improvements are needed for application in the market. However, as the ultimate stage of LED display, Mini LED and Micro LED is the inevitable trend of industry development and will continue to receive industry attention.

3. Naked Eye 3D

Naked eye 3D displays were a hot topic in 2021 due to the incredible visual experience they bring. By integrating LED display screens with city landmark features, naked-eye 3D displays have become a new way for many cities to seek to quickly create new city business cards and promote the recovery of the cultural tourism industry. In addition, the further improvement of flexible LED screens and compatibility of more diverse display materials and content with LED screen panels, many high-end brands and business districts prefer 3D LED screens to expand their brand influence. Undoubtedly, the naked-eye 3D display will become the vane of development of the LED display industry along with the high-definition display.

4. VR/XR Virtual Filming

In the case of repeated epidemics, virtual LED display allows many performing arts, advertising, and other media industries to see the convenience of an LED screen wall in shooting unique environments and more possibilities of application. And virtual production LED wall with its seamless and self-luminous characteristics, can present a realistic and high-definition outdoor environment indoors while eliminating the need for tedious post-production of video, greatly improving the efficiency of filming. It can be foreseeable that the development of the segment of the virtual production LED wall will continue, and the prospects are good.

5. Metaverse

The metaverse and the concept of user-generated content (UGC) have continued to receive widespread attention in the last two years, resulting in accelerated growth in the productions of AR/VR devices. Vuzix, WaveOptics, Xiaomi, and TCL have released commercialized products of Micro LED AR smart glasses. And as more brands launch end-use products, LED display suppliers will also introduce the concept of metaverse in their product concepts and future product planning. There is no doubt that the future scale of the metaverse market will further expand with the development of the high-tech industry and LED display industry.

6. Digitization

The construction of smart cities in recent years continues to promote the digital development of cities in depth. Affected by the COVID-19 epidemic, the no-touch mode makes all industries have to upgrade towards digitalization and wisdom, so digitalization and intelligent empowerment have become an inevitable trend and requirement for the transformation and upgrading of every traditional industry. In addition, with the improvement of small pitch technology, the application of narrow pixel pitch LED display in indoor scenes will get more opportunities under the empowerment and enrichment of information technology. It also further stimulates the process of urban wisdom upgrade and provides more market for LED screen panels.

7. Immersive Experience

The immersive application of LED display screens has become another important label for the application of the display industry. At present, there are increasing numbers of users creating diversified immersive application scenes through LED screen walls to refresh the application form of LED screen, including immersive theater, exhibition, shopping district, and entertainment venues. The immersive application promotes the diversification of the form of leisure places at home and abroad, bringing more fun experiences to people. Not only that, the immersive application of LED display screens is still diffusing to more fields and will bring more display possibilities for people in the future life.

8. Outdoor LED Screen

In order to better disseminate the cultural values of national subjects, UHD 4K/8K content is called for as the main channel and the main force of cultural communication. Many national governments support the establishment of ultra-high-definition 4K screens or 8K screens in cities that are in a position to do so in order to enhance the penetration of the ultra-high definition video industry. The development and implementation of this initiative will greatly promote the development of the outdoor LED display industry. Furthermore, with the deepening emphasis on small LED pixel pitch technology and the addition of HD 4K screens and 8K screens, LED display screens will remain the dominant public large-screen applications for a long time. It effectively promotes the development of the outdoor LED screen.

9. Cinema LED Screen

In the 125 years since the birth of cinema, the projection method has always held a monopoly in the cinema market. But since the world’s first cinema LED screen of Samsung onyx debuted in South Korea in 2017, LED display screens have brought a new era of projection to the film industry. It is predicted that by 2025, of the 20,000 new screens in Chinese cinemas, 2% will be cinema LED screens, and 1% of the 80,000 existing screens will be upgraded to cinema LED screens. It is indisputable that with the maturity of cinema LED screens in standards and technology, the future development of the cinema LED screen market has unlimited imagination.

10. Chip Shortage

Repeated epidemics at home and abroad led the logistics and transportation industry to the dilemma and thus broke out the problem of chip shortage in the LED display industry. Under the wave of global shortage of chips, the LED display industry has also suffered an unprecedented blow, causing the chip prices to climb and production difficulties for some LED screen manufacturers. Many leading LED screen providers began to realize the importance of the chip. In order to alleviate the current dilemma of lack of chips on the LED screen, they began to invest in the domestic chip industry. So far, the plight of LED display manufacturers will be further alleviated, and innovative breakthroughs in the LED display industry will also be facilitated.

Driven by the development trend of the industry and rising consumer demand, LED display screens will be applied to more high-definition display and virtual display scenarios to facilitate brand influence and business promotion further. Therefore, investing in LED screens is a great option with a high-profit return. If you are considering purchasing LED screen panels to expand your business and enhance your brand influence, RIGARD is an option for you.

As a leading LED display manufacturer in China, RIGARD follows the industry trend and is committed to breakthrough technology innovation to provide cost-effective LED display screens. In order to meet the high demand for UHD display and indoor LED display, RIGARD is proficient in the production process of LED pixel pitch, and breakthrough COB technology innovation to provide more narrow pixel pitch LED screens below P1.0. Besides, flexible LED screens, transparent LED screens, 3D display screens, 4K screens, and 8K screens are also available at RIGARD to meet your personalized needs. You are also allowed to customize different LED screen panels according to your brand style and personal taste.

Anyway, if you have more questions and ideas about LED display screens, REGARD welcomes your inquiries.