LED Display Working in Low Temperature

Nov 6, 2022 | knowledgebase | 1 comment

LED Disply working in Low Temperature

Earth is a planet of extremes. Countries like Mali experience sweltering average temperatures as high as 83.89 °F (28.83 °C), while less than 3,500 kilometers away, the Swiss fight their way through the 6.1 °F winter chill. 

Map and list of the top 20 countries by lowest temperature ever recorded

coldest countries world map
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led display in extreme cold weather

The impact of  led display working in Extreme Weather

Outdoor LED displays in cold climates face the problem of different thermal expansion coefficients and uneven changes in the physical dimensions of their materials, such as masks, PCBs, module kits, and cabinet frames

  • Crack between module and module, cabinet and cabinet.
  • The shrinkage and breakage of the led modules’housing kits and cabinet frame.
  • The uneven shrinkage between the LED lamp and the mask, causing the LED lamp to loosen and display failure;
  • The potential dangers of water intrusion caused by the shrinkage of the waterproof rubber ring of the cabinet in low temperature.
  • The Power supply cease to work.
  • the protective(PVC) layer of the cable is easily broken, which will cause serious problems such as short circuit or even fire.
led display in sea mountain desert

Selection of Low Temperature Resistant Raw Materials.

Adopt low-temperature resistant raw materials and devices, such as cold-resistant masks and bottom shell kits, low-temperature resistant waterproof glue, low-temperature power supply(meanwell) (can be started in an environment of -40℃; -25℃); Adopt low-temperature resistant cabinets, low-temperature resistant electronic devices and connectors.

specification lowe temperature led display power supply

Extra high protection ability

As outdoor fixed LED display works in outdoor environment for a long time, the PCB, power supply, soldering joints, etc. have high requirements for high and low temperature resistance, water resistance and corrosion resistance ability. It is recommended to carry out the coating and cold-proof treatment for PCB, components and parts, solder joints, etc., to protect the circuits from damage under the environments containing chemical substances (such as: fuel, coolant, etc.), vibration, moisture, salt spray, humidity and high temperature, low temperature conditions, thereby prolonging their service life.

Strong LED cabinets

The use of low-temperature resistant LED Cabinets: when the temperature reaches minus thirty degrees or even lower, the box of the LED display will shrink and deform, which will cause the gap between the box and the box to become larger, and even cause the peer lamps are not in the same straight line.

Heating Devices

Installing heating devices or fans inside the cabinets to keep the temperature within a reasonable range.

If the temperature is too low for the power supply to start, the screen will use an air curtain to warm up. Once the screen is warm enough, it will turn on normally. The temperature control system will turn off the air curtain when the temperature reaches the desired level.

Daily Maintenance in extrem cold weather.

To prevent damage to your led screen in very cold conditions, follow these tips:

  • The best option is to keep your led screen on all the time
  • If you can’t do that, at least use the stand-by mode when you are not using it
  • If you have to turn it off and it doesn’t turn on easily, then you may need to heat up the led screen gently

VISIONPI has developed two new products for outdoor fixed installation: the KINGKONG series and the CAMEL series. These products use high-quality raw materials to ensure they can adapt to different environments and protect themselves from damage. VISIONPI has a laboratory that is certified by CNAS, the national accreditation body of China. The laboratory tests every cabinet multiple times before they leave the factory. The tests check how well the products can work and store in low temperatures, and how they can handle changing temperatures. This way, the products can be used normally in cold places.

LOW TEMPERATURE LED DISPLAY TEST

VISIONPI Low Temperature resistant Outdoor led display

aluminum outdoor led
outdoor high brightness led display
super high brigthness outdoor led modules
mountain top led display

Low Temperature resistant COB LED Display

Our COB LED display, equipped with a patented three-layer surface treatment, is specifically designed for extreme cold weather resistance. The advanced Black Bottom Adhesive Layer enhances contrast without affecting brightness, while the Buffer Layer ensures exceptional durability and impact resistance in freezing conditions. Additionally, the Highly Transparent Top Layer provides superior surface protection, maintaining clarity and performance, making this display ideal for reliable operation in harsh, low-temperature environments.

high brightness cob led display
cob led display modules indoor common cathode
cob led display in extreme cold weather control room

HDR 10 LED DISPLAY

Sep 23, 2022 | knowledgebase | 0 comments

HDR stands for High Dynamic Range, which is a technique of capturing, processing and displaying images that have a much wider range of color and contrast than standard dynamic range (SDR) images. HDR images can show more details in both bright and dark areas, as well as more vivid colors, making them more realistic and closer to what the human eye can perceive. HDR is often used in photography, video games, movies and TV shows to enhance the visual quality and immersion of the content.

SDR VS HDR LED DISPLAY copy

There are several HDR industry standards that define the technical specifications and requirements for HDR content creation and display. Some of the most common ones are:

  • HDR10: This is an open-source HDR standard that is widely supported by most HDR display devices and media platforms. It was announced by the Consumer Technology Association in 2015 and requires a 10-bit color depth, a BT.2020 color space, and a minimum display brightness of 1000 nits.
  • HLG: This is a HDR standard developed by the BBC and NHK for digital program delivery. It was launched in 2015 and does not use metadata, but rather combines HDR signals into TV broadcast signals. It is compatible with current broadcast equipment and has no licensing fees. It is suitable for cable/satellite TV and live broadcast.
  • Dolby Vision: This is a proprietary HDR standard developed by Dolby Laboratories that requires certification and payment. It was launched in 2014 and offers a 12-bit color depth, a BT.2020 color space, and a minimum display brightness of 4000 nits. It also uses dynamic metadata to optimize the HDR image quality for each scene. It is supported by some TV manufacturers such as Sony and LG.

Four requirements for HDR video to be realized, specifically for the HDR10 standard. 

  • 4K resolution, which means they have 3840 x 2160 pixels. This is four times more than the standard HD resolution of 1920 x 1080 pixels. Having more pixels means having more clarity and sharpness in the image, which is essential for HDR.

 

color gumut requirement for hdr led screen
  • High contrast ratio, which means it can show a big difference between the brightest and darkest parts of the image. For HDR10, the display device must be able to produce at least 1000 nits of brightness, which is a measure of how bright a screen can get. It must also be able to show blacks of less than 0.05 nits, which is a measure of how dark a screen can get. Having a high contrast ratio means having more details and depth in the image, which makes it more realistic and vivid. LED displays are very good at achieving high contrast ratios, unlike some other display technologies.
HDR led display brightness and contrast ratio
  • 10-bit color depth, which means they can show 1024 shades of each of the three primary colors (red, green, blue). This is much more than the 8-bit color depth of standard video, which can only show 256 shades of each color. Having more shades of color means having more smoothness and richness in the image, which avoids the problem of “banding” or “stepping” between colors. It also means that some parts of the image can be very bright without affecting the rest of the image, such as the sun, a flash, or a fire.
color gamut BT2020
flip chip cob led display 0.9 1.25 1.56

FLIP-CHIP COB

LED Display Contrast Ratio

Sep 23, 2022 | knowledgebase | 1 comment

LED Display Contrast Ratio Definition

According to the definition of industry-standard SJ/T11281-2007 “Light Emitting Diode (LED) Display Test Method,”Contrast is a term that describes how bright or dark the image on an advertising LED screen is. It is calculated by comparing the brightness of the white and black colors on the screen. The contrast ratio is a number that shows how much brighter the white is than the black.

For example, an LED display contrast ratio of 1000:1 means that the white is 1000 times brighter than the black. The higher the contrast ratio, the more clear and colorful the image is. The lower the contrast ratio, the more dull and blurry the image is.

High coåntrast cob flip chip led wall
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Static and dynamic contrast ratio

: The contrast ratio can be measured in different ways, such as static contrast ratio and application contrast ratio. The static contrast ratio is measured in a completely dark room environment, and it is usually very high, as high as millions to one. The application contrast ratio is measured at an ambient illumination of 10±10% lx, and it is more realistic and practical. According to industry standards, an LED display application contrast ratio greater than or equal to 5000:1 is the highest level of C.

 Different Contrast ratios Among COB, GOB, SMD led displays

SMD LED Display: Black SMD LEDs VS White LED Screen.

Black SMD LED in small sizes, make them perfect for incorporation into instruments and devices. The smaller the chip size, the higher the contrast ratio of the LED display. This is because a smaller chip leaves more black space on the display, which reduces the brightness when the LED is off. Even though a smaller chip also reduces the brightness when the LED is on, the contrast ratio still increases significantly.

Black LEDs have a higher contrast ratio than white LEDs, which means they can produce darker blacks and more uniform colors. The contrast ratio of black LEDs is 8000:1, while the contrast ratio of white LEDs is 3000:1.

  • Power consumption: Black LEDs consume less power than white LEDs, which makes them more energy-efficient and eco-friendly. The power consumption of black LEDs is 350/m2, while the power consumption of white LEDs is 410/m2.
  • Brightness: White LEDs have a higher brightness than black LEDs, which means they can be more visible in bright environments. The brightness of white LEDs is Max. @2000cd/m2, while the brightness of black LEDs is Max. @1500cd/m2.
  • Display effect: Black LEDs can display black or gray colors more accurately and smoothly than white LEDs, which can cause distortion or noise in the same colors. Black LEDs have more stable and softer colors, although less bright than white LEDs.
high contrast black led with white led

Contrast Ratio: GOB LED Display VS SMD LED Display

High-contrast-GOB
gob-contrast

LED Display Contrast Ratio: COB VS GOB

The contrast ratio of the COB led screen is higher than the SMD and GOB led screens. This is because the COB package does not use a bracket structure to support the chip device, which limits the size of the package body and the light-emitting pixel point. The COB package can use smaller chips according to different viewing needs, which increases the black area on the display and improves the contrast.

cob-led-display-visionpi-painting high contrast ratio copy
cob-led-display-contrast

LED Display contrast ratio Flip chip COB vs Lateral Chip COB 

The LED display contrast ratio of the flip-chip is higher than the front-mounted chip. This is because the flip-chip does not have electrodes and bonding wires on the light surface, which occupy part of the area that should be light. The flip-chip also has a larger light-emitting area and a higher luminous efficiency. This makes the LED brighter when it is on and darker when it is off, which enhances the contrast.

lateral chip cob vs flip chip cob

High Contrast COB LED Display

As aforementioned, the importance of high contrast for mini LED displays is obvious. The combination of full flip-chip and COB packaging technology of the mini LED display is an outstanding contribution to improving the contrast. Therefore, a full flip-chip COB display will be the best solution for a high-contrast ultra-fine-pitch LED display.

flip chip cob led display 0.9 1.25 1.56

With several years of experience as the leading mini LED display manufacturer in China, VISIONPI offers COB LED displays with high contrast, high brightness, high color, high definition, and other excellent performance. For instance, our COB series displays have achieved a contrast ratio of 15,000:1 while offering affordable prices. Therefore, our COB series mini LED displays can showcase unparalleled display effects to enrich users’ viewing experience. 

Pixel pitch covers P0.4-P1.8 to meet different requirements of users

  •  1,200nits brightness
  • 18Bit grayscale
  •  up to100,000:1 contrast ratio
  •  120% NTSC color gamut
  •  7,680Hz refresh rate
  •  Extremely high protection performance
  • Single Module Calibration Technology
  • onforms to industry standards and specifications
  • Self-developed optical display technology greatly protects the eyes
  • Multi-scene applicability

High Contrast Outdoor LED Display

The high contrast outdoor LED display designed to perform under direct sunlight incorporates features that optimize visibility and readability, even in challenging lighting conditions. Here’s a closer look at why black LED technology stands out and how it contributes to enhancing display performance in outdoor settings:

Outdoor Black LED Display Advantages

1. Higher Contrast Ratio: By using black LEDs, the display achieves a much darker black than traditional white or grey LEDs. This results in a significantly higher contrast ratio.

2. Sunlight Readability: Traditional LED displays can become washed out under direct sunlight due to their inability to produce true black colors, reducing their contrast.Black LEDs maintain their color integrity and contrast even in bright conditions. The deep blacks create a stark difference against the colored pixels, making the content more readable.

3. Lower Brightness Required:Traditional LEDs often require higher brightness levels to improve visibility in sunlight, consuming more energy.With black LEDs, the need for excessive brightness is reduced, lowering energy consumption while maintaining visibility.

high contrast outdoor led display black led
HIGH CONTRAST LED DISPLAY

Black LED Rental Display

The superior visual performance of our Black Rental LED Display, designed to enhance contrast ratios and minimize reflections in any lighting condition. Featuring advanced black LED technology, this display excels in both outdoor and indoor environments, making it an ideal choice for broadcasting, filming, and live events. Under sunlight, its visibility surpasses traditional displays due to its exceptional contrast levels, even outperforming many indoor LED displays. Additionally, the wide color gamut covers 99.9% of DCI P3, ensuring rich, vivid colors that bring camera captures to life with stunning clarity and depth. Whether for an event, broadcast, or filming project, our Black Rental LED Display offers unmatched visual quality that adapts flawlessly to every environment.

black led for rental led display indoor and outdoor
rental led display contrast ratio black led vs wihte led

How to Install Indoor LED Wall

Feb 8, 2022 | Installation, knowledgebase | 33 comments

How to install indoor led wall

1. Preparations

1.1. Unpacking

Warning: To prevent damage to the LED panel, wear anti-static gloves before installing/touching the display. After unpacking, do not place the display vertically on the floor, an accident such as a fall may be caused.

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Die-casting LED Display Cabinets Installation

Use a pair of scissors to cut the sealing tape on the cardboard box. Carefully take the cabinet and accessories out of the cardboard box. After opening the cardboard box, ensure that the contents are complete and in good condition.
package of indoor led display
• LED Cabinets &LED Modules

• Power cable;LAN cable (RJ45, CAT-5)

• Connection plates

• LED Controller

led display and accessories visionpi led display
1.3. Tools

• LED Cabinets &LED Modules

• Power cable;LAN cable (RJ45, CAT-5)

• Connection plates

• LED Controller

led screen installation tools
• Test led modules

Press the CHECK button on the back of each cabinet to check if the product can operate normally.

test led display

2. Structure Installation

Precautions when handling the cabinets:

• Do not drop or apply shock/vibration to the product. Strong impacts may damage the component inside.

• Only a qualified service technician should perform the installation.

• Only use approved cabinets. • Be careful not to damage the corners of the cabinet.

• Install the display in a well-ventilated area.

• Always wear anti-static gloves when touching the display.

• Provide air conditioning around the LED display to allow heat dissipation away from the display.

• To maintain proper ventilation, keep clear space from the mounted displays to the wall. Installing the product in poorly ventilated spaces may damage the LED.

led display installation standing structure

Wall Mount Kits

A wall mount kit is made of aluminum profile 40x40mm (in some regions sold separately or available from third party vendors) allows you to mount the LED display on the wall. For detailed information on installing the wall mount, see the instructions provided with the wall mount. Wall mounting can only be performed from the front side of cabinets.

wall mounted structure led wall visionpi
1. Fixed the aluminum profile on the wall with anchors. Insert cage nuts into the slot of the aluminum pipe

2. Insert the connection plate on the structure, and use the Allen screw bolt to connect the cage nuts.

led wall wall mouted structure
3 connect cabinets with structure by connection plate with Allen; connect cabinets together by faster lockers

4. Install led modules (follow the arrow direction of the modules)

led screen installation steps

3. Cabinet installation

Step 1. Use a gradienter to adjust the flatness and verticality and then secure the cabinet to the connectors on the rack frames. Use connection plates to fix the screen. Start your installation from the bottom row. Install the connecting plates on the bracket (Fig 1). Rotate the hex key clockwise until the screw bolts are inserted, and fasten the fast locker on between two cabinets (left to right, up to down)(Fig2.) ※Do not fix the screws between the connectors and cabinets too tight for future adjustment.

led screen cabinet installaiton
Step 2. Install the connecting plates on the structure. Rotate the hex key clockwise until the screw bolts are inserted. Do not over-tighten the screw bolts yet as you may need to adjust the connecting plates again. Ensure that the seam and flatness between cabinets conform to the standard after each cabinet is installed. Otherwise, make some adjustments, lockout LED lamp boards after they are adjusted horizontally and vertically because the boards will probably be moved during the installation of other lamp boards. Repeat the above steps to install the other cabinets in the lowest row.
connect two led screen cabinet
Step 3. fasten the lockers and check the unevenness of the nearby cabinets, and adjust them by the hex, loosen, or tighten to bring the cabinets to the same level. can use fingers to feel the “cross” of four nearby cabinets to see if the cabinet is well aligned. Ensure that all the cabinets are flat and vertical and the seams between the cabinets are even. Then tighten the screws to complete the installation.
cabinets connection

4. Power and Signal Wiring

The data wiring process must follow a zigzag order between the cabinets, always starting from the one located at the bottom left. The modules are then connected to the data in and data out ports. Thanks to our system software we can verify the correct wiring of the entire screen with simple tests. Finally follows the color calibration and brightness setting.

 5. LED Modules installation.

After check all the cabinets are well installed, attach the led modules to the cabinet, please check the arrow on the back of the PCB and follow the direction, and connect the flat cable and power cable from the hub to each of the modules. tips: to check the status of each led module on the cabinet, you can use one spare cabinet to test the condition of the led modules by pressing the test button on the hub.

led modules installaiton step 4
To install the module to the hub board, the flat cable that connects between them has to be properly wired. One end of the flat cable is already attached to the hub board, use the other end to connect it to the module. Before connection, make sure that the arrow sign on the module ispointing up. Connect the flat cable to the connector on the module until it clicks into place. 
modules installaiton indoor led screen

Modular Cabinet 320x480mm Installation

320x480mm led cabinet installation layout
320x480mm led cabinet installation layout

XR Stage LED Video Wall

Nov 4, 2021 | knowledgebase | 3 comments

Green Screen VS XR Stage led wall

 

Will the green screen be replaced by XR Stage led wall? we are witnessing a transformation from green screen to the led wall for video production on film and television sets; virtual production can create a living and dynamic background. Are you interested in this new technology because of its simple construction and affordable cost? Extended Reality (XR) is a cutting-edge technology for cinema, television, and live events.

Within studio environments, XR enables production teams to deliver Augmented and Mixed Reality. Mixed Reality (MR) combines camera tracking and real-time rendering to produce an immersive virtual world that can be seen in real-time on set and captured in-camera. MR allows actors to be immersed in a virtual environment by using high-resolution LED panels or projection surfaces in the room. The material on these panels may be created in real time, presented from the camera’s point of view, thanks to camera tracking technology.

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Virtual Production

Virtual production, as the name implies, is the use of technologies generated from virtual reality and gaming to create shots for television and movies. It employs the same setup as our XR studio, but instead of events, the virtual settings may be utilized for filmmaking.

virtual production led display_

What is XR and how does it work?

Extended Reality is abbreviated as XR. It’s a step forward from augmented reality to virtual reality. The technique of expanding the virtual set beyond the LED volume is referred to as XR. A volume, or cave, made of LED tiles can be found in an XR studio.The Immersive XR stage takes over where the physical stage ends, producing an extended reality setting that provides spectators with a dynamic experience.These images depict scenes produced with real-time generative software or gaming engines like Notch or Unreal Engine. . This technology allows the material on these screens to be dynamically generated from the camera’s perspective. As a result, our material travels with the camera. 

Why choose Immersive XR Stage led wall?

 

  • A Production That Is Truly Immersive.
  • Content changes in real-time Seamless camera tracking and switching.
  • There is no color key or spill.
  • Cost-effective and secure.
xr filming led wall

1.Truly Immersive Production.

Developing rich virtual environments that immerse talent in the environment purpose of MR is to give broadcasters and production firms an alive and immersive production environment so that they may generate more appealing content and make faster creative decisions during the production process. MR enables the construction of multi-purpose studio settings, with the complete system adaptable to any sort of programming and any camera arrangement.

2.Content changes in real-time Seamless camera tracking and switching
DPS and camera operators can readily view and explore the environment in the camera thanks to LED displays’ realistic reflections and refractions, allowing for a faster workflow. In a sense, you’re conducting post-production in pre-production. On the screen, you can plan your shots and see precisely what you want.

3There is no color key or spill.

There are many shortcomings of the traditional chromo key technology, such as the rendering of the image is not real enough and high cost for the post-production and personnel. The XR stage perfectly solved these issues. Virtual production eliminates the need for chroma keying in postproduction The XR stage enables significantly faster camera tracking system calibration than the typical green screen. The significantly improve the efficiency of setting up the scenario across several sessions.

4.Cost-effective and secure.

All sorts of scenarios may be generated with the XR stage without having to travel to different locations or attempting to locate them. Filming using an LED volume in a studio reduces the number of locations needed in production, saving money on hiring costs at different sites. When it comes to social distancing and covid-19, a virtual environment is a safe way to keep the cast and crew safe in a controlled atmosphere. With fewer people on set, it’s simpler to social distance and covid-test staff.

 

build xr stage led wall

How to Build a XR Stage LED Wall

Building an LED panel is not difficult, but building one with the quality and dependability expected by media and film makers is a different story.There is no ready-to-use virtual production system available. Building one necessitates extensive knowledge and expertise with all of the features and elements involved. There’s a lot more to LED screens than meets the eye.

mutiple function led display

Multiple Applications

“A single led screen with several functions.” 
The fundamental aim is to build fewer devices overall by allowing a single unit to do many jobs. LED Poster, LED wall rental, led dance floor and XR stage led wall

Fine Pitch Pitch LED

Pixel Pitch LED, a factor specified by the usage or type of photographs you want to create, is one of the first things to work out. The lower the pixel pitch, the more close-ups you’ll need, but keep in mind that finer pixel pitch implies less light from the LEDs for your scenario.

The refresh rate of the screen has an impact on visual quality. The greater the disparity between the LED screen and the camera’s refresh rate, the more difficult it is for the camera to detect it. Although a high frame rate is ideal, particularly for fast-paced live-action, there are still practical restrictions on content rendering today. Even if the LED panel can display at 120 frames per second, the renderer may struggle to keep up.

Broad-casting level LED WALL

Broad-casting level refresh rate is a must .The success of the virtual stage production depends on synchronizing input sources to the camera and playback on screen. “Syncing the camera settings with the LED is a time-consuming and precise operation. If your LED panels and camera are out of sync, it can cause a variety of visual abnormalities such as ghosting, jitter, and picture distortion. We carry genlock all the way to the end and have a number of features to ensure that the genlock is adjusted down to the nanosecond.”

 Wide colorimetry

It is critical to maintain a consistent color presentation under various viewing angles in order to make the virtual picture more lifelike. We can tune the color science of the LED volume to the sensor and the unique demands of the DP on each project because we can monitor the raw data of every single LED and because we work closely with digital cine camera companies like ARRI.”

VISIONPI Visual’s technology has been offered to rental firms for use in film and television production for many years as a designer and producer of LED displays.

The Transformer led wall rental series matches the XR stage led video wall as virtual production-led wall applications flawlessly with its custom-designed for virtual production with the Brompton R2 receiving card and processors.

  • HDR10 is a high dynamic range (HDR) standard.
  • cutting-edge 4000Hz ultra high refresh rate to accommodate many camera system manufacturers.
  • Color gamut guidelines must be met. 
  • Rec.709, DCIP3, BT 2020 HD, 4K high resolution, color calibration memo Rec.709, DCIP3, BT 2020 HD, 4K high resolution, color calibration note .
  • LED module built-in flashes load the calibration data automatically.
  • True black LED, 1:5000 magnification.
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COB VS FLIP-CHIP COB LED Display

Jun 11, 2021 | knowledgebase, Technology | 1 comment

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. 

 

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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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