What is led display scan mode

Feb 17, 2023 | knowledgebase | 67 comments

led display scan mode

Scan mode, also called Scan rate or scanning driving, refers to the number of LED pixels that can be connected to a single driver IC. Each pixel is connected to a pin on the driver IC on the PCB board. The number of drivers required on a PCB board design to illuminate the pixel pitch determines the scan type. 

Two types of Scan modes:

1. Static scanning: 

Static scanning is to implement “point-to-point” control from the output of the driver IC to the pixels. 

2. Dynamic scanning:

Dynamic scanning is to implement “point-to-column” control from the output of the driver IC to the pixel points. 

Several factors, including the type and performance of the driver IC, refresh rate, grayscale, and pixel pitch directly influence the scan design.
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scan mode led driving IC
A single driver IC has 16 pins output and can drive a maximum of 16 LED chips. In static drive mode, all LEDs on the LED module can be driven by the IC simultaneously, as illustrated in the following image.
scan rate of led screen

Static: A single-driver IC has 16 pins and can drive a maximum of 16 LED chips. In static drive mode, all LEDs on the LED module can be driven by the IC simultaneously, as illustrated in the following image.

1/2 Scan: In 1/2 scan mode, the IC drives a set of 1/2 LEDs on the module at a time, and subsequently switches to another set of 1/2 LEDs.

1/4 scan: 1/4 of LEDs on the module are driven by IC at one time, and next time there are other 1/4 LEDs that are driven.

Taking a 1/45 scan P1.875 design with the LED and driver IC on the same side as an example:

Module size:300×168.75mm; pixel resolution: 160×90=14,400 dots.

Each LED contains 3 color chips(1R1G1B), so there is a total of 14,400×3=43,200 colors in one led module.

with 1/45 scan driving mode. only 43,200/45 =960 colors are required to be lit up each time.

Since each Driving IC has 16 pins. so the total amount of Driving ICs required for one module is 960/16 = 60 pcs (2o pcs for Red color;20 pcs for Green Color;20 pcs for Blue color)

driving ic led display diagram visionpi

Why is Dynamic driving mode essential? 

A static driver design (P1.875) would require  2700 16-channel driver ICs and current setting resistors. That will lead to an increased number of PCB layers and costs, on the other hand, the brightness is much higher but the current is also too high. 

A dynamic driving mode design utilizes a single driver IC to activate more LEDs, conserving space on the PCB board and optimizing the budget and driver IC’s layout. However, when aiming for high image quality, there is a trade-off between high grayscale and high scan rate. As a result, a smaller pitch necessitates more time-multiplexing in the design. Typically, P2.5 displays implement a 1:16 time-multiplexing design, whereas displays with a pitch of 2 mm and below require time-multiplexing above 1:16.

Scan Mode,brightness,refresh rate and grey level

The lower the scan rate, the better the performance and the more expensive it will be.

  • Brightness

    The higher the scan the more LED pixels one driver needs to light at once. The brightness is doubled compared to a 1/2 scan, and with a 1/4 scan, the brightness doubles compared to a 1/8 scan. Nevertheless, adjusting the software through experimentation can reduce the brightness if high brightness is not essential. in some cases, the outdoor fine pixel pitch led display requires a super high brightness of 6000-10000nits, the high brightness gold wire LED can provide the required brightness in a lower scan mode (1/13scan 1/16 scan)

high brigtness outdoor led display visionpi

  • Power Consumption 

    Increasing the scan rate results in higher power consumption. A simple formula accurately reflects this correlation: for instance, a 1/8 scan consumes twice as much power as a 1/16 scan. The current is also a limiting factor. In the future, factories may reduce current, thereby diminishing both power consumption and brightness. commom cathode technolgy can reduce the power consumption without sacrifce the brightness.

energy saving led display visionpi

  • Refresh Rate

    The refresh rate of a screen is indicated in hertz (Hz) and signifies how frequently the image is updated per second. When the number of scan lines is doubled, the time required to illuminate all LEDs will increase twofold, and the refresh rate will be halved. Thus, increasing the number of time-multiplexing in a design makes it more challenging to achieve a high refresh rate. Decreasing the scan rate will reduce the refresh rate and vice versa. However, the PCB design and type of driver IC also influence the refresh rate. Incorporating a driver IC with an embedded SRAM can enhance the refresh rate by decreasing the time required to transmit grayscale data. If the driver IC supports GCLK multiplier technology, the refresh rate must be doubled.

Choosing a scan mode for LED display is a crucial decision that depends on various factors, such as brightness, power, refresh rate and cost. A higher scan mode is not always better, nor is a lower one. The goal is to design an optimal LED screen that meets the desired specifications.

COB LED Display Modules

Jan 22, 2023 | General | 19 comments

Visionpi: Excellence in COB LED Display Innovation

Visionpi stands at the forefront of COB LED display module manufacturing. Our commitment to innovation is showcased through advanced technology that meets the growing need for high-resolution, bright, and versatile outdoor displays. Visionpi offers flexibility in design and superior performance, ensuring energy efficiency and durability for impactful visual experiences in any indoor and outdoor advertising space.

What is COB LED Display Modules?

COB LED Display Modules, also known as COB LED Display Panels or COB LED Display Tiles, are key components used in the assembly of larger LED displays, which you might see used for advertising, information display, or as part of a digital signage system. These modules are essentially small sections of an LED screen, containing an array of LED lights. Let’s break down the concept to understand it better:

Basic Components

  • LEDs (Light Emitting Diodes): Small, efficient lights that can emit a variety of colors. They are the primary visual element of the display.
  • Circuit Board: LEDs are mounted on a circuit board, which provides the electrical connections necessary for the LEDs to function.
  • Driver ICs: Integrated circuits that control the brightness and color output of the LEDs.
  • Housing: A protective casing that holds the circuit board and LEDs, often designed to facilitate heat dissipation and protect the components from environmental factors.
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. 
cob led display vs gob vs smd
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COB VS SMD PACKING

COB LED Display Modules Advantages:

  • High brightness and low power consumption

COB LED display can achieve higher brightness than other LED modules, such as SMD and DIP, because its chips use less space. This also means that it consumes less power and saves energy.

  • Excellent heat dissipation

COB LED display has a high-efficiency heat transfer substrate made of aluminum or ceramic. This allows the COB LED chips to be mounted closely and dissipate heat effectively.

  • Outstanding protection ability

COB LED display has a coating technology that protects it from moisture, water, dust, UV rays, and impacts. This ensures that the screen has high visual performance, reliability, and durability.

  • Super lightweight

COB LED displays can use PCB boards with different thicknesses, from 0.4 to 1.2 mm, depending on the customer’s needs. This reduces the weight to at least 1/3 of the traditional products, which can lower the costs of structure, transportation, and engineering.

  • Anti-impact and crush

COB LED display has a smooth and hard surface that covers the LED chips, which are embedded in the concave position of the PCB board. This makes the screen resistant to impact and wear.

  •  Wide viewing angle

COB LED display has a viewing angle of 175° to 180°, which provides a better optical diffuse color effect.

  • Long working time

COB LED display has a triple protection treatment that makes it resistant to water, dust, rot, electrostatic, oxidation, UV, and so on. The screen can work normally under temperatures ranging from minus 30 degrees to 80 degrees.

OEM COB LED Display Modules.

150×168.75mm

cob led display modules indoor common cathode
cob led display modules 1.25 1.56 0.9
cob led display modules specification copy

320×160 mm COB LED Screen Modules

COB 320×160 Series LED Modules Eliminate Batch Variability

Discover the COB 320×160 Series LED modules that solve the LED batch issue, ensuring uniformity across all panels. Perfect for scalable screen projects or replacements without worrying about mismatched batches.

cob led modules 320x160mm
cob p1.8 320x160mm led modules

COB LED Display 640x480mm

Our 640×480 COB LED display is expertly assembled using 320x160mm COB LED modules, providing a versatile solution for your display needs. This high-resolution display offers pristine image clarity and exceptional durability, making it suitable for creating both mini COB LED screens and dynamic mini COB LED posters. Ideal for various applications, from advertising to information dissemination in commercial settings, this compact and energy-efficient display ensures optimal performance and visual impact.

640 indoor hd led wall
COB LED DISPLAY MODULES 320X160MM copy

COB LED Display Modules: Pixel pitch covers P0.4-P1.8 to meet different requirements of users

  •  600-1,200nits brightness
  •  18Bit grayscale
  •  up to100,000:1 contrast ratio
  •  HDR 10 supported
  •  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

Package

cob led display package visionpi

Visionpi- the professional cob led display modules manufacturer 

Visionpi emerges as a pioneering force in the realm of LED display technology, specializing in the manufacture of COB (Chip on Board) LED display modules. With a steadfast commitment to innovation, quality, and durability,  The company leverages cutting-edge COB technology to create display modules that offer superior brightness, color accuracy, and energy efficiency compared to traditional LED solutions. VisionPi’s products stand out for their robustness, capable of withstanding various environmental conditions, making them ideal for a wide range of applications, from high-end retail spaces to large public installations. Dedicated to pushing the boundaries of what is possible with LED display technology, VisionPi is not just a manufacturer but a visionary partner for businesses and designers looking to bring their creative visions to life.

cob led display manufacturer workshop copy

Unlock the potential of your brand with Visionpi’s COB LED modules, offering premier OEM services for custom COB LED display designs. Elevate your visual impact with tailor-made solutions that blend innovation with quality. Start your project today!

Outdoor COB LED Display

Jan 20, 2023 | General | 0 comments

The future of Micro LED For outdoor Advertising.

In recent years, the demand for high-resolution outdoor advertising displays has surged, with COB (Chip on Board) LED technology rising to meet this challenge. COB outdoor LED displays have made it feasible to achieve finer pixel pitches without compromising on brightness, setting a new standard in the industry. Unlike traditional LCD displays, COB technology provides enhanced versatility in screen size and shape, allowing for more creative and adaptive outdoor display solutions. This technological advancement is revolutionizing the way we experience outdoor advertising, offering unprecedented clarity and design flexibility.

outdoor fine pixel 1.2 1.5 1.8 led display

Outdoor COB LED Display.

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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COB packing technology 

COB technology is a new and advanced way of making LED displays for outdoor use. It improves the performance and pitch of the displays, making them brighter, more uniform, and more durable. However, COB technology is also more costly and difficult to produce at the moment. which means that it is only suitable for high-end commercial display markets. COB technology is gradually gaining more popularity in the market, its ‘market share was less than 10% a few years ago.

COB VS SMD PACKING

Outdoor COB LED Display Features

  • Enhanced Durability: COB LED displays are known for their robustness, with the LEDs encased in a single module, which offers better protection against environmental factors like dust, water, and impact.
  • High-Resolution Imaging: The close packing of COB LEDs results in a seamless and dense pixel array, providing clearer and more detailed images, which are essential for outdoor displays.
  • Improved Heat Dissipation: COB technology typically has better thermal management due to its design, ensuring longer lifespan and consistent performance even under direct sunlight.
  • Wide Viewing Angles: With COB LEDs, viewers can enjoy wider viewing angles without experiencing color shifts or brightness loss, making the content visible from different perspectives.
  • Brighter Displays: COB LEDs can achieve higher brightness levels compared to other LED technologies, making them ideal for outdoor environments where sunlight readability is crucial.
  • Lower Power Consumption: Despite their brightness, COB LEDs can be more energy-efficient, translating into lower power consumption and operational costs.
outdoor fine pixel led display high brightness p2.5

High brightness and color uniformity

COB LED display can achieve a brightness of 3500nit/m2 for outdoor applications. and a color gamut of more than 115% NTSC  The uniform phosphor coating on the array of chips ensures consistent color performance across the display

outdoor cob led display brigthness

Wide viewing angle and high contrast

COB LED display has a viewing angle of up to 170 degrees, which means it can be seen clearly from different angles  The dark surface of the flip-chip COB display also enhances the contrast ratio and reduces the glare. The compact size of the COB LED also allows for more flexibility in designing the display shape and size.

outdoor cob wide viewing angle 170outdoor cob wide viewing angle 170
outdoor cob wide viewing angle 170outdoor cob wide viewing angle 170

Superb Reliability

Completely sealed with epoxy resin to cure the light-emitting chip, COB LED will be anti-shock, anti-collision, moisture-proof, dust-proof, waterproof, and so there will be no problem caused by transportation and installation

cob outdoor led display dust proof
outdoor cob led display waterproof 1.9
anti bump cob outdoor led display screen

Outdoor COB LED Display-Rental Series

Pixel pitch covers P1.2-P1.8 to meet different requirements of users

  •  3500 nits brightness
  •  16 Bit grayscale
  •  up to 10000:1 contrast ratio
  • IP65 Waterproof
  •  Failure rate less than 3/million
  •  3840Hz refresh rate
  •  Extremely high protection
  • Self-developed optical display technology greatly protects the eyes
  • Super wide viewing angle 170
OUTDOOR P1.8 4000nits led display fine pixel pitch

Outdoor  COB LED Display-Fixed installation

Pixel pitch cover 1.25mm-2.5mm to meet different requirements of users

  •  4000 nits brightness
  •  16 Bit grayscale
  •  High temperature resistant 
  •  120% NTSC color gamut
  •  3840Hz refresh rate
  •  Extremely high protection performance
  • Failure Rate less than 3/million
  • Super wide viewing angle 170
  • Enenrgy-effficiency saving 40%
outdoor p1.8 cob led display modules 320x160mm high brigtness 4000nits 7680hz

Best COB LED Display Manufacturers

Jan 12, 2023 | knowledgebase | 5 comments

COB LED Display Technology Development 2023

According to some data, in the first half of 2023, the sales of fine pixel LED (P2.5 and below) screens in China reached 7.33 billion, which is a little bit more than last year. COB technology had a big part in this, as its sales and display area grew a lot, much more than the other types of fine pitch LED screens. This shows that COB technology has changed from a small and special type of screen to a big and common one. It is ready to grow even more in technology and industry.

This change is related to how COB technology has improved and found new uses. Since it started in 2012, it has become better and better over the years. It has become cheaper and more popular, and it has more advantages than other types of LED screens. It is more reliable, more energy-saving, and more suitable for mini/micro LED technology. It can also meet the needs of new LED display products, such as LED all-in-one machines, business meetings, and smart education panels. These products need high-quality screens that are very clear and bright. Many COB brands have done very well in these markets.

fip-chip cob
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Best COB LED Display Manufacturers:

 

Cedar Electronic

Cedar, established in 2001, is a global leader in providing LED display and lighting products with Flip-chip COB fine pitch technology. We belong to the Changchun Institute of Optics, Fine Mechanics, and Physics (CIOMP), which is part of the Chinese Academy of Sciences. We operate five branches in Beijing, Shanghai, Shenzhen, U.S.A., and Germany, and three factories in Changchun, Hangzhou, and Foshan.

AOTO

AOTO is a company that specializes in LED application products and financial technology products. It was founded in 1993 and has its headquarters in Shenzhen, Guangdong, China. Its products include Radiant LED display, mini LED display, LED theater system, intelligent conference all-in-one machine, rental LED screen, and more. It also offers financial technology and intelligent lighting solutions. AOTO aims to develop and produce high-quality financial electronic equipment and LED photoelectric information display products.

AOTO has regional branches in Beijing, Shanghai, Guangzhou, and Chengdu. It is building a nationwide marketing network and service system, and expanding its presence in the global market.

AOTO has grown significantly in the past 20 years. It now has 15 subsidiaries (four of them overseas), 40,000 square meters of LED display production and R&D base, 70+ service outlets, and 7×24-hour comprehensive service.

AOTO values research and development. It invests more than 6% of its revenue in R&D annually, and has applied for 47 global patents, of which 25 have been granted.

AOTO LED displays are widely used in international airports and major sports events, such as the World Cup and the European Cup.

mtc cob

SHENZHEN MTC

Shenzhen MTC is a prominent player in the LED industry, focusing on the production and development of COB (Chip-on-Board) display panels. As a listed company covering the entire LED manufacturing process, MTC is involved in the production of epi-wafers, chips, packages, modules, and end-market applications. The company is particularly noted for its advancements in Mini and Micro LED technologies, utilizing these in both backlight and RGB direct-view displays.

MTC has rapidly expanded(Especially in 2023) its production capabilities, especially in COB technologies for Mini/Micro LED applications, positioning itself as a leader in fine-pitch and ultra-fine pitch LED displays. With plans to become the world’s largest COB panel maker.60-70% SMD led display manufacturers are using MTC’s COB during to its aggressive cost.

Leyard

Leyard Group is a global pioneer in audio-visual technology products and their cultural applications. It went public on the Shenzhen Stock Exchange on March 15, 2012 (stock code 300296).

The Group has nine manufacturing bases and seven global marketing centers, and employs nearly 5,000 people (more than 700 of them are foreigners). It is the world’s first company to possess the most advanced original technology of small pitch LED display.

The company has delivered visual effects services for the following projects:

50th, 60th, and 70th anniversaries of the National Day; 2008 Beijing Olympic Games; And other major national events. It also works with domestic and international organizations and project activities, and has overseas subsidiaries in the United States, Brazil, Europe, Japan, Canada, and more (such as Planar, Natural point, etc.).

According to the latest 2019 Global LED Display Industry Market Research Report by Futuresource, Leyard Group has been ranked first for four consecutive years in:

Global LED display market share; Small-pitch LED display market share; Indoor LED display market share.

Visionpi Display

Visionpi specializes in R&D, and production, and provides OEM Service of Micro&Mini LED  display modules and LED Display Screen. Guided by its core values, Visionpi’s expert R&D team continually enhances its R&D and production technology and equipment, innovates high-quality products, and maintains strict quality control, advancing in the new high-tech display field with a customer-centric service principle.

Visionpi has a wealth of experience in OEM services and focuses on the middle and high-end market for COB applications, particularly in environments such as control rooms, broadcasting, and extended reality (XR). These applications benefit from Visionpi’s unparalleled brightness capabilities, which reach up to 2000 nits.

Additionally, Visionpi has pioneered the industry’s first flexible COB LED display. This innovation is part of their strategy to extensively promote and apply COB technology across various platforms, including COB rental LED displays, COB outdoor fine pixel displays, and COB transparent LED displays. This diverse application of COB technology underscores Visionpi’s commitment to advancing in the new high-tech display field with a customer-centric service principle.

Unilumin

Unilumin is a LED display company that was established in 2004 and has its headquarters in Shenzhen, China. It has a state-of-the-art production base with a fully independent standard factory building that spans over 40,000 square meters and a modern fully automated assembly line with all the necessary facilities and equipment.

Unilumin has hired many top-notch LED industry R&D experts and trained over 1,000 employees with professional skills to manage the production chain.

Unilumin has a consistent monthly production capacity of more than 5,000 square meters, making its R&D and production capacity unparalleled in China.

Unilumin was one of the first LED display companies to go public in China in 2011 and bought ROE visual in 2012, and established a subsidiary in the U.S. It offers world-class LED displays for various applications, such as the control room, broadcast, commercial, retail, entertainment, sports, landscape photo, and more.

LEDMAN

Ledman Optoelectronic Co., Ltd.（Stock name: Ledman, Stock code: 300162）was founded in 2004 and became one of the world’s leading LED UHD display experts, the global leader in COB display technology and 8K UHD display, China’s first LED display high-tech listed company, and the manufacturer of the Ice and Snow Five Rings in the opening ceremony of the Beijing 2022 Winter Olympics. The company focuses on 8K Micro LED UHD display products based on COB advanced technology. For years, it has ranked TOP 3 in the market share of LED fine-pitch COB displays.

The Chinese COB LED display market is rich with innovation and variety, catering to a broad spectrum of applications. As the demand for high-quality, durable displays continues to grow, these manufacturers are poised to play a pivotal role in the global LED industry. With their forward-thinking designs and customer-centric approaches, they stand as beacons of excellence in the COB LED display sector.

Customized Can LED Display

Nov 26, 2022 | General | 0 comments

Introducing Our New Customizable Bottle and Can-Shaped LED Displays: A Creative Solution for Brand Visibility

In the world of digital advertising, standing out is more crucial than ever. Our latest innovation, the custom bottle-shaped and can-shaped LED displays, offers brands a unique, high-impact way to capture audience attention. Perfectly replicating the look of a soda can or beer bottle, this display isn’t just eye-catching—it also delivers a 360-degree viewing experience, customizable for various shapes and sizes. Here’s a closer look at what makes these LED displays an ideal choice for branding, advertising, and event promotions.

POP CAN LED DISPLAY BOTTLE
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Applications for Bottle and Can-Shaped LED Displays

These creative displays provide an immersive advertising experience that is especially effective for beverage branding. Imagine a cola can LED display promoting a soda brand, or a beer bottle LED screen advertising a brewery. Such displays are perfect for retail stores, malls, trade shows, and special events, providing high-impact visuals that instantly resonate with viewers.

Our bottle-shaped LED displays are also customizable with interactive features, allowing brands to engage with audiences in unique ways. For instance, touch-enabled functionality can make the display more engaging, offering an interactive experience that encourages users to explore more about the product or brand.

Tin shape led display coffe store
Bar and club LED Display can, bottle shape

Flexible Customization Options

We understand that brands and businesses have unique needs, which is why our customized LED display shapes are fully adaptable. Whether you’re looking for a soda can-shaped LED screen or a beer bottle LED display to showcase your brand, we can accommodate various shapes and sizes to fit your specific requirements. We currently offer popular sizes with pixel pitches of 1.875mm, 2mm, and 2.5mm, ensuring high resolution and crisp image quality.

Our modular design enables flexible customization and allows for quick installation and maintenance. Each can-shaped LED display is composed of interchangeable modules, making it easy to replace individual sections as needed, which reduces downtime and maintenance costs. Additionally, these displays are mounted on a wheeled base, allowing for quick transportation and setup in various locations.

creative can shape led display coca cola
bottle shaped led display

Uniquely Recognizable Design

One of the biggest strengths of our can-shaped LED display is its unique, cylindrical form. Modeled after common beverage containers like cola tins, beer cans, and ketchup bottles, these displays offer brands a recognizable format that immediately draws attention. Their round shape makes them perfect for 360-degree LED displays, allowing viewers to see dynamic, engaging visuals from all angles.

This bottle-shaped LED display is also highly versatile and can be used in a variety of settings, from retail and malls to events, performances, and sports venues. With their vibrant colors and customizable designs, these displays are ideal for bringing products to life and adding a creative touch to any promotional setting.

soda coca cola tin can shape led screen bottle

Reliable, Energy-Efficient Technology

Our bottle-shaped LED displays are engineered for stability, reliability, and energy efficiency. Utilizing high-quality LED modules and advanced driver technology, these displays maintain consistent performance even in demanding environments and with prolonged use. Compared to traditional display products, our can-shaped LEDs boast impressive energy-saving capabilities, making them a sustainable choice for long-term installations. This energy-efficient feature not only saves costs but also aligns with the growing demand for eco-friendly advertising solutions.

coca cola can led display ,customized led screen flight case packge

Key Benefits of Our Bottle and Can-Shaped LED Displays

  • High Visibility: With their familiar shapes and 360-degree viewing, these displays attract immediate attention.
  • Modular and Customizable: Adaptable to various sizes, shapes, and pixel pitches to suit any brand’s unique needs.
  • Energy-Efficient: Uses advanced LED technology for lower power consumption, making it environmentally friendly.
  • Easy Installation and Maintenance: Modular design enables quick setup, simple module replacement, and convenient mobility with a wheeled base.

Our customized LED display shapes open new doors for brands looking to make an impact. By choosing our can-shaped LED displays, businesses can deliver compelling, immersive advertising experiences that capture attention and leave a lasting impression.

For businesses seeking a new edge in advertising, our bottle-shaped LED displays are the answer. Reach out to us today to learn more about how we can bring your brand vision to life with our creative, customizable LED solutions.

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