With the development of modern information technologies such as artificial intelligence, big data, and 5G, digital technology has become an important engine of industrial innovation, and the trend of digital transformation in exhibition halls has become increasingly obvious.

After years of development, LED display screens have formed a stable industrial chain, driving the popularity of LED displays.

However, they also have the disadvantages of excessive screen temperature and excessive power consumption. After the emergence of common cathode LED display power supply technology, it attracted great attention from the market.

We compare the conventional LED display (common anode display) with the common cathode cold screen to let everyone know more about the common cathode cold screen.

What is a common cathode cold screen?

Refers to the common cathode power supply method. The common cathode cold screen uses common cathode lamp beads, and R and GB are powered separately.

"Cathode" is the negative electrode, which is opposite to the anode (positive electrode).

The current passes through the lamp bead and then to the negative electrode of the IC.

What is a common anode display?

The common anode displays current flows from the PCB board to the lamp beads, and the RGB lamp beads are uniformly powered.

What is the difference between a common cathode/common anode LED display?

The power supply direction is different:

the current of the common anode LED display flows from the PCB board to the lamp bead, and the RGB lamp beads are uniformly powered, which increases the forward voltage drop of the circuit;

the current of the common cathode LED display first passes through the lamp bead and then to the negative electrode of the IC. The voltage drops and the conduction internal resistance is small.

The power supply voltage is different:

Common anode LED displays usually give red, green, and blue lamp beads a voltage higher than 3.8V (for example, 5V unified power supply, which causes large power loss; common cathode LED displays use red, green, and blue lamp beads based on the same voltage).

The actual voltage required by the chip (the red lamp bead voltage requires about 2.5V, and the blue and green lamp bead voltage requires about 3.8V) are accurately supplied separately, resulting in less power loss and much less heat generated during the operation of the LED display.

What are the characteristics of the common anode display screen?

Common cathode cooling screen lower heat

The special common cathode power supply method of the cold screen makes the LED display generate less heat and reduces the temperature rise during operation.

Under normal circumstances, in the white balance state and when playing videos, the cold screen temperature is about 20°C lower than the conventional outdoor LED display of the same model!

For products with the same specifications and brightness, the screen temperature of the common cathode LED display is more than 20 degrees lower than that of conventional common anode LED display products, and the power consumption is 50% lower than that of conventional common anode LED display products. above.

Realistic and more stable colours:

The common cathode drive method can accurately control the voltage, which not only reduces power consumption but also reduces heat generation. There is no wavelength drift under continuous operation and a stable display of true colours.

Shared cooling screen saves money

The advantages of the common cathode cooling screen are that the temperature rise of the common cathode cooling screen is low, the heat of the screen body is uniform, the color temperature is constant, there are no colour patches after long-term use, and the picture display effect is good.

Maximise energy consumption while ensuring high brightness and high contrast.

A separate and precise power supply allows the LED display to reduce part of the power loss and reduce operating costs.

At the same time, the working characteristics of low heat and low-temperature rise can eliminate the need for cooling equipment such as air conditioners and reduce investment costs.

iSEMC outdoor common-cathode cold screens have the advantages of low-temperature rise, low heat, low power consumption, long life, and good display effects, and are expected to become the new favourite for outdoor display applications.

Improved screen life:

The energy consumption is reduced, which greatly reduces the temperature rise of the system, effectively reduces the probability of LED damage, improves the stability and reliability of the entire display system, and more effectively extends the system's life.

The meaning of common cathode and common anode:

The smallest unit of an LED display is a light-emitting diode. Light-emitting diodes distinguish between positive and negative electrodes, conducting forward and blocking in reverse. Common cathode means the cathodes of light-emitting diodes are connected, and common anode means the anodes of light-emitting diodes are connected.

Final Thought

Common cathode LED display market development:

At present, the mainstream LED displays in the market adopt the common anode power supply method. With the improvement of living standards and the strengthening of the concept of green environmental protection, our energy-saving requirements for LED displays are getting higher and higher. LED display manufacturers have also followed the trend of the times and launched more common cathode energy-saving LED display products.

With the rapid development of technology, LED video walls have become an indispensable part of New Year celebrations in major cities around the world. It is not only a display screen, but also a display of art and a transmission of culture.

iSEMC’s LED video wall technology continues to innovate, making the display effect more vivid and bringing a new experience to New Year celebrations.

Light up the New Year's night sky

In New Year celebrations around the world, LED video walls have become the focus with their unique charm. It can show more brilliant visual effects than traditional fireworks, taking the audience into a dreamy world of intertwined light and shadow. With high-definition and brightly colored images, LED video walls add infinite vitality to celebrations.

Environmental protection and energy saving

LED video walls are more environmentally friendly than traditional celebration methods, such as fireworks. It produces no pollution and reduces noise, making it a greener way to celebrate. At the same time, iSEMC’s LED video wall technology continues to innovate, making the display effect more vivid and bringing a new experience to New Year celebrations.

The LED video wall is not just a display device, it is also a platform for displaying culture. During the New Year's Day celebration, the traditional culture and art of different countries and regions can be displayed through the LED video wall, promoting cultural exchange and understanding.

At the turn of 2023 to 2024, on a special night, thousands of people gathered in squares around the world to celebrate the arrival of the New Year. This is a description of this exciting moment, focusing on the spectacular countdown on the large LED display screen.

As the time approaches midnight, people's sense of anticipation increases. A review of major events over the past year was played on the screen, which resonated with the audience. From breakthroughs in science and technology to glorious moments in sports, from the prosperity of culture and art to the magnificent scenes of nature, every scene arouses people's admiration.

Finally, the countdown begins. Counting down from 10, each number appears on the LED screen with stunning visual effects. A synchronized countdown sounded from the crowd, getting louder and louder until the entire square was enveloped in this exciting atmosphere. When "1" finally appeared on the screen, the entire square boiled, followed by a spectacular scene of fireworks blooming, lighting up the entire night sky.

On this night, whether it was the countdown on the LED display or every smile in the square, it became part of the beautiful memories of the New Year. People will welcome the arrival of 2024 with this warmth and hope, and look forward to more beautiful moments

Brand promotion and information dissemination

Businesses and brands also use LED video walls to promote during New Year celebrations. By playing creative advertisements and brand stories, companies can effectively increase their exposure in such large-scale events. At the same time, the LED video wall was also used to disseminate information about the event, such as safety tips, event procedures, etc., to ensure the smooth progress of the celebration.

Final thought

As technology advances, LED video walls can also provide interactive experiences. During the New Year's Day celebration, viewers can interact with the video wall through smart devices, which increases participation and fun. This new form of interaction is becoming the highlight of more and more New Year celebrations.

The application of LED video wall will be more extensive. In the New Year celebration, we can look forward to a more stunning visual feast and a richer interactive experience. The LED video wall not only changes the way we celebrate the arrival of the new year, but also opens up a new era of celebration.

As technology further develops in the future, we expect LED video walls to play an even more important role in New Year celebrations.

Happy New Year to all!

Happy New Year to 2024!

In a video system composed of multiple video sources, a video switcher is usually used to display multiple images in turn on one display device.

But sometimes to allow monitoring personnel to see the situation of all monitoring points simultaneously, multiple video splitters are often used to display multiple images on one display device simultaneously.

When several multi-video splitters are used, it is possible to display multiple images from all video sources simultaneously using the same number of display devices as the multi-video splitters.

In this way, the number of display devices is reduced, and the monitoring personnel can monitor the situation of each part at a glance.

Basic working principle of video splitter:

Using image compression and digital processing methods, several images are compressed on the screen of a display device at the same ratio.

Some also have the function of a built-in sequence switcher.

This function can output the full-screen images input from each video source in sequence and at intervals and display them on the display device in turn (just like switching the host in turn to switch images) and can be used with the video recorder as mentioned above.

The order and time interval are recorded. The interval is generally adjustable.

1. The principle and function of video splitter for surveillance equipment

In the security industry, surveillance applications are the most common, and video splitters are often used in surveillance equipment.

There are four video splitters, nine splits, and sixteen splits.

They can display images from 4, 9, or 16 video sources on one display device at the same time, and can also send them to a video recorder for recording.

Multi-video video splitters are One of the more common ones.

iSEMC HDMI screen splitter is a high-performance switcher with four channels of high-definition screen splitting and seamless output switching.

The switch can display four channels of high-definition digital video signals on the same screen and has a variety of Video-splitting effects, four high-definition input signals can be seamlessly switched at the same time.

The switcher has diverse and flexible control methods and can be controlled through local IR. With product stability and simple installation, it is a highly practical split switcher that can be used in major engineering projects, conference halls and other places.

2. Functions of video splitter

The video splitter adopts the latest special image processing technology and special devices, using microcomputer control technology and digital image processing technology.

The number of input and output signal channels can be customized on demand, and it has very powerful system flexibility and scalability.

Video splitters are widely used in many fields such as telecommunications, railways, banks, campuses, and homes.

They have undergone rigorous tests in various environments and have been widely recognised by users.

The performance and price of the video splitter are relatively good, and the quality and continuity of the image can meet most requirements.

Nine-split and sixteen-split are more expensive, and after splitting, the resolution and continuity of each channel image will decrease, and the video recording effect will be poor.

3. Working principle of video splitter

Using image compression and digital processing methods, several images are compressed on the screen of a display device at the same ratio.

Some also have a built-in sequence switcher function.

This function can output the full-screen images input from each video source in turn and display them on the display device in order and at intervals and can be recorded by a video recorder in the order and time intervals mentioned above.

The interval is generally adjustable.

How to adjust the resolution of the quad screen splitter

A quad-screen splitter is a video processing device that can divide a screen into four small windows and simultaneously display four different video sources. To adjust the resolution, you can follow these steps:

Step 1: Connect the device

Connect the quad screen splitter to the screen where the video needs to be displayed to ensure a stable connection. Connect four video sources simultaneously, which can come from TVs, computers, DVD players, etc.

Step 2: Enter the settings

Enter the settings menu of the quad screen splitter, usually via the remote control or the buttons on the device.

Step 3: Choose resolution

​In the settings menu, find the resolution option. Typically, you can choose from standard resolutions such as 1080p, 720p, 480p, or a custom resolution.

Step 4: Adjust resolution

​Select the desired resolution and adjust parameters for best results. Generally, a higher resolution provides a sharper image but uses more bandwidth and processing power.

You can select an appropriate lower resolution if your device or network does not support high resolution.

Step 5: Save settings

After completing adjustments, save your settings and exit the settings menu.

You can now see that the quad splitter will display four video sources, with each small window having the resolution corresponding to the settings you selected.

Final thought

Adjusting the resolution using the Quad Splitter can give you clearer, higher-quality video effects. By following the above steps, you can easily adjust the resolution and get the best results. Video splitter is a high-tech product based on hardware structure—ideal products designed specifically for large and medium-sized monitoring, dispatching, and command centres.