HOB LED Display

HOB VS GOB LED DISPLAY

COB VS GOB LED DISPLAY: Most might be familiar with COB LED displays, but they may not know about the most uptodate pixel protection technology called GOB LED display. In this article, we will discuss how GOB or Glue on Board can help protect LED displays.

What is GOB

To Understand what is HOB(HGOB) we need to learn what is GOB.

Glue on board is abbreviated as GOB. It is an epoxy resin that is applied to the surface of surface-mounted display modules to create an overall layer of glue that improves the sealing of SMD displays. It is a technology developed to address the issue of LED lamp protection. GOB LED Display is able to work in any challenging environment, making it water-resistant, dust-proof, shock-resistant, and UV-resistant, it is widely used in restaurants, hotels, bars, and Stadio.

What is HOB?

HOB (Hotmet on Board) is a process that uses nanomaterials with high refractive index to coat the surface of the screen and form a protective layer that covers the LED chips completely. This layer prevents the LED chips from being affected by external factors and increases their stability and lifespan. It also improves the quality and efficiency of the LED displays during the packaging process.

GOB LED DISPLAY
hob led technology advantages

GOB VS HOB

HOB uses a high-temperature molding process, while GOB uses a normal-temperature dispensing process. HOB has better thermal stability, accuracy, flatness, and thickness control than GOB. Moreover, high-temperature molding can prevent the glue from cracking due to heat generation during LED operation.

Durability

HOB adopts the COB process of high-temperature molding with a polymer synthetic colloid, which contains various additives, coagulants, and anti-UV agents. This can prevent the yellowing problem of ordinary epoxy, and also adjust the black pigment and design the mold frosted surface.

waterproof dustproof anti-bump cob led display

Anti-Scratch.

When you place a conventional GOB product and a HOB product side by side, and scratch the surface with a screwdriver, you will see a clear difference. The GOB product is not scratch-resistant and will show scratches and cracks immediately, while the HOB product will remain intact. This is because the HOB product uses the COB process of high-temperature molding with a polymer synthetic colloid, which has various additives, coagulants, and anti-UV agents. This can avoid the yellowing problem of common epoxy, and also modify the black pigment and create the mold frosted surface.

HOB anti-scratching

Optical performance

GOB process has a variable thickness of the final product, and a difference in the flatness of the self-leveling colloid, which results in a thicker GOB product. This causes a more noticeable edge refraction problem when splicing on a large scale, which is commonly known as the bright line problem of the writing angle.

HCOB uses precision molding tools, which ensure that its thickness is only up to 0.2mm higher than the LED height, and the light hardly undergoes secondary refraction at the edge of the colloid.

Contrast 

The surface of the final product of the ordinary GOB process is a mirror surface, which cannot achieve a frosted or matte surface.

HCOB uses mold design and pressure molding to create a frosted surface, which is similar to matte black light. This increases the contrast of the entire screen by 40%.

HOB VS gob contrast ratio

Precision 

HCOB uses high-precision mold technology, which allows the overall molding accuracy to be controlled within 0.2mm, according to conventional mold precision. GOB uses room temperature molding, which depends on the molecular internal coagulation curing, and has a shrinkage problem. The best progress of GOB so far is 0.5mm, and some products need secondary processing. HCOB technology has been applied in batches on the mainstream pitches of 1.2, 1.5, and 1.8.

Arch LED Display Screen

Arch LED Display: Illuminating the Curve

In the dynamic world of visual displays, LED technology has taken center stage, offering crisp, vibrant visuals across a plethora of applications. Among these innovations, the arch LED display emerges as a captivating evolution, marrying form with function in a visually stunning manner. This blog post delves into the essence of arch LED displays, exploring their technical specifications, design features, applications, and the future trajectory of this exciting technology.

arch led display outdoor hd
arch led display flexible display

Design and Structural Features

Arch LED displays distinguish themselves through their innovative design and structural features. Unlike flat panels, these displays require a flexible substrate and LEDs that can bend without compromising performance. This flexibility is achieved through advanced materials and manufacturing techniques, allowing the displays to be shaped into gentle curves or complete circles. The result is a display that can seamlessly integrate with its surroundings, adding a dimension of depth and engagement that flat panels cannot achieve.

Applications and Use Cases

The versatility of arch LED displays has opened up a world of applications across various industries. In retail, they transform storefronts and interiors into dynamic advertising spaces. Entertainment venues, such as concert halls and theaters, use arch displays to create immersive backdrops. Sports stadiums and arenas employ them to enhance the spectator experience with vivid, wraparound visuals. Public installations, including airports and subway stations, also leverage these displays for both informational and aesthetic purposes.

Arch LED Display for stages

arch led display stage

Arch LED Display for outdoor

arch led display customized for entrance door outdoor

Arch LED Display for Plaza

arch led screen creativ shopping center

Advantages of Arch LED Displays

Choosing an arch LED display offers several advantages over traditional flat panels. The curved surface provides a wider viewing angle, ensuring the content is visible from various perspectives. This curvature also adds a three-dimensional aspect to visuals, creating a more immersive experience for viewers. Additionally, arch LED displays can be more energy-efficient and offer superior durability, thanks to advancements in LED technology.

Design and Structural Features

Arch LED displays distinguish themselves through their innovative design and structural features. Unlike flat panels, these displays require a flexible substrate and LEDs that can bend without compromising performance. This flexibility is achieved through advanced materials and manufacturing techniques, allowing the displays to be shaped into gentle curves or complete circles. The result is a display that can seamlessly integrate with its surroundings, adding a dimension of depth and engagement that flat panels cannot achieve.

ARCH LED DISPLAY DESIGN P3

Unleashing Creativity with Arch LED Displays with Visionpi

For those intrigued by the potential of arch LED displays to transform spaces and create unforgettable visual experiences, the journey is just beginning. Whether you’re looking to innovate in retail, entertainment, sports, or public installations, arch LED displays offer a canvas limited only by imagination. Explore the possibilities, and let the curve lead the way to your next visionary project.

Flame Retardant LED Display

Fire hazards are a serious concern for LED displays, which are widely used in various fields. To prevent fire accidents and protect people and property, this article proposes five strategies for fire protection of LED displays:

catch fire led display

LED Screen Fire Analysis

  • Wire rods: The wire rods used for LED displays should conform to the national standard, as they need to withstand high power consumption and ensure electrification stability. Low-quality wire rods can cause overheating and short circuits.
  • Power supply: The power supply products for LED displays should be certified by UL, as they have a scientific conversion rate and can work under hot external environments. Inferior power supply products can cause voltage fluctuations and fire hazards.
  • Protective materials: The protective materials for outdoor LED displays should be resistant to aging, rain, and high temperatures. Aluminum-plastic plates are prone to crack and let moisture penetrate into the screens, resulting in short circuits and fire accidents.
  • Plastic housing : The plastic kit for LED displays should be inflaming retarding and durable, as it can prevent deformation and brittleness under high and low temperatures. It should also be combined with glue with fine sealing performance, as it can prevent rain from entering the interior and causing short circuits and fire accidents.
high brigtness outdoor led display visionpi

How to prevent fire accidents

To prevent fire accidents in LED displays, four types of key materials should be considered:

  • Cables: The cables should have a protective sheath that can withstand high temperatures. The cables should also comply with the safety code and avoid overloading and short circuits. The cables are the most important part of the circuit to protect the electronic products from fire.
  • Power supply: The power supply products should have safety certification and a high conversion rate. They should be able to work under high-temperature environments and prevent harmonic currents from causing fires. Large-scale LED displays should have a built-in PLC circuit switch to control the power load.
  • Protective materials: The protective materials for outdoor LED displays should be fire-resistant and durable. They should not crack or age under different temperatures and rainy environments. They should prevent rain or moisture from penetrating into the screens and causing short circuits and fire accidents.
  • Plastic protection kit: The plastic protection kit for LED modules should be made of flame-retardant PC glass fiber material. It should resist fire and various temperatures for a long time. It should not deform or embrittle. It should also be bonded with glue to prevent rainwater from entering the interior and causing short trouble and fire disaster
flame-retardanåt-led-display-screen

UL 94 is a plastics flammability standard released by the Underwriters Laboratories (USA). The standard classifies plastics according to how they burn in various orientations and part thicknesses from the lowest flame-retardant to the most flame-retardant in six different classifications.

V0-plastic-flammability-test

Thermal and Ventilation Design

Outdoor LED displays generate a lot of heat, which can be dissipated by two common methods: fan or air conditioner. The choice depends on the maximum heat dissipation. Moreover, a scientific thermal balance design is important for the whole heat dissipation solution, which is sometimes neglected or underestimated. Thermal balance design aims to distribute the heat of the whole system evenly, so as to reduce the risk of fire disaster caused by excessive heat accumulation.

led-display-high-temperature-test-
led display contrast ratio visionpi

Fire-proof LED Display 

led-modules-fire-proof
aluminum outdoor led
outdoor high brightness led display
super high brigthness outdoor led modules

Front Service Outdoor P2.5 LED Display

The Front Service Outdoor LED Display P2.5

In the dynamic world of digital displays, the advent of front service outdoor LED displays, especially the P2.5 model, marks a revolutionary leap forward. Designed to meet the evolving needs of businesses and public spaces, this cutting-edge technology combines convenience, durability, and unparalleled visual performance. Here, we explore the remarkable features of the front service outdoor LED display P2.5 that set it apart in the digital signage arena.

Front Service: The Game Changer 

The front service outdoor LED display P2.5 introduces a fully magnetic service cabinet measuring 600x400mm, a design innovation that simplifies installation and maintenance. This feature is a boon for businesses looking for a hassle-free display solution that can be easily accessed and serviced from the front, eliminating the need for rear access space. The cabinet’s IP67 waterproof rating further ensures its resilience against the elements, making it an ideal choice for outdoor environments.

outdoor front service p2.5 high brightness led display

Brilliance that Shines: High Brightness at 6000 Nits

Brightness is a critical factor for outdoor displays, and the P2.5 LED display excels with a luminosity that reaches up to 6000 nits. This high brightness level guarantees that the display remains vivid and legible even under direct sunlight, ensuring your message is always clear and impactful. Whether it’s for advertising, information dissemination, or public announcements, the P2.5 display ensures your content catches the eye of every passerby.

Versatility in Display: The Outdoor LED Poster

One of the most remarkable aspects of the P2.5 LED display is its versatility. By assembling four cabinets together, businesses can create a 1200x600mm LED poster, offering a larger canvas for creative and engaging visual content. This feature opens up new possibilities for outdoor advertising, allowing for the display of high-resolution images, animations, and videos that captivate and engage the audience. Whether it’s standing alone or integrated into a larger display network, the P2.5 LED poster is a powerful tool for innovation that simplifies installation and maintenance. This feature is a boon for businesses looking for a hassle-free display solution that can be easily accessed and serviced from the front, eliminating the need for rear access space. The cabinet’s IP67 waterproof rating further ensures its resilience against the elements, making it an ideal choice for outdoor environments.

outdoor led poster display p2.5 copy

Innovative Design: Bevel Edged for LED Cube Display

The P2.5 display goes a step further in design innovation with its 200x200mm modules that can be crafted with bevel edges at 45 degrees, enabling the creation of LED cube displays. This unique feature allows for the assembly of three-dimensional displays that can serve as dynamic and interactive installations in public spaces, events, or retail environments. The LED cube display not only enhances the aesthetic appeal of the space but also provides a memorable interactive experience for the audience. design

200x200mm outdoor led display p2.5 45 degree cornerled cube copy
Item Parameters
Pixel pitch 2.5mm
LED Type SMD1415
Pixel Density 160,000 dots
LED Module Size 200 x 200mm
LED Module Resolution 80 x 80 dots
LED Cabinet Size 600x400x50mm
Cabinet Resolution 240×160 dots
Signal Processing  12 – 16 bit
Grey Level 4096 – 65536
Refresh Rate > 3840Hz
Scan Mode 1/20
Brightness >6,500 nits
Viewing Distance > 3.8m
Viewing Angle 120 degree
Input Voltage 100-240V/50-60Hz
Max Consumption 750W/SQ.M
Ave Consumption 225W/SQ.M
Working Temperature -20 degree to 45 degree
Storage Temperature -40 degree to 60 degree
IP Rate IP65
Working Humidity 10% – 60%
Storage Humidity 10% – 90%
Lifespan 100,000 hours
Service Type Front & Rear Service
LED Lamp Nationalstar
IC ICN2153
Control Card Nova / Colorlight
Stock Availability YES
Cabinet Size Option 200x200mm, 400x400mm, 600x600mm, 800x800m

COB VS FLIP-CHIP COB LED Display

In the field of LED display, with the development of upstream packaging technology, there gradually form two different LED display panel preparation technologies, SMD ;IMD; COB. We can use these two technologies to produce small-spacing mini LED display screens. And we will share some information about these two technologies with you.

What is COB?

COB (Chip on Board) is a kind of LED display packaging technology. LED light-emitting chips are directly bonded to the module board with high precision and connected to driver components on the module board through special media for overall protection of the light-emitting surface. COB packaging eliminates the two key procedures of turning LED chips into lamp beads and reflow soldering as compared to standard SMD packaging. 

 

Features Of COB LED DISPLAY

1. With Ultra-High Reliability

COB technology eliminates the process flow of SMD light-emitting tube packaging, color separation, taping, and patching, simplifies and improves the reliability of the product production process. Longer Life Span: Without the holder, the LED chip has lower heat resistance, largely increasing its life span

2. Smaller Pixel Pitch allowed

Smaller Pixel Pitch: the pitch of SMD is P1.2-P2.0, while COB is P 0.5-P2.0 .The COB technology  is not limited by the physical size, bracket, and lead of the SMD LED package, and can break through the SMD pitch limit, achieve higher pixel density, and have a more flexible dot pitch design.

3. Larger Viewing Angle: 

COB more likes the surface light source than the SMD, when light refracts, it has less light loss. COB Realizes The Conversion From “Point” Light Source To “Surface” Light Source.No pixel graininess; can effectively control the brightness of the pixel center, reduce the intensity of light radiation, inhibit moiré, glare, and glare to the retina, suitable for close and long-term viewing, not easy to cause visual fatigue, suitable for close-screen viewing.

4. Higher Protective Performance

The PCB circuit board, crystal particles, solder feet, and leads are fully sealed. The advantages of the sealed structure are an obvious-for examples, moisture resistance, anti-collision, prevention of pollution damage, and easier cleaning of the device surface.

Wire bonding COB structure  VS A Flip-Chip COB structure

Wire Bonding COB. In wire bonding COB Also called (face-up cob or Lateral COB), the LED chips are attached directly to the substrate using an adhesive, and their electrical connections are made with thin wire leads. This method is quite traditional and widely used due to its cost-effectiveness and simplicity in connecting the LED chips to the driving electronics.

Flip chip COB, on the other hand, involves mounting the LED chip upside down on the substrate so that the light emits from the top, making direct contact with the substrate. This setup enhances heat dissipation, reduces the thermal path, and generally provides better luminous efficiency and reliability.

lateral chip cob vs flip chip cob

Flip chip cob led display advantages

1. Higher stability. Flip chip packaging technology eliminates wire bonding, eliminating the risk of gold wire breakage and simplifying the production process.

LED COB WIRE BONDING

2. Smaller pixel pitch.  Flip-Chip COB encapsulation is the chip-level integrated encapsulation. Without the wire bonding, the physical space size is only limited by the size of the light-emitting chip, which can achieve higher pixel density.

3. Better visual performance. Regarding display performance, the area of the Flip-Chip is smaller on the PCB board, and the duty cycle of the substrate is increased. It has a larger light-emitting area, which can present a darker black field, higher brightness, and higher contrast Presenting HDR-level display effects.

cob structrure visionpi

4. Cost-effective. There is no welding wire link, simplifying the production process and reducing equipment investment costs. As the industry scales, the product cost will be significantly reduced, especially when the dot pitch is less than 1.0mm.

Therefore, Flip-Chip COB technology is a necessary condition for the realization of MicroLED and will go further in the era of micro-display.

The Future Of direct view led display.

Flip-chip COB is an upgraded version of lateral COB, flip-chip COB improves reliability and visual performance, simplifies the production process, and narrows the pixel pitch. COB is the future of direct view led display 

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