Analysis of COB LED Display Screen Technology

COB LED display technology is an advanced packaging technology that directly integrates LED chips on the PCB board to achieve high integration and compact structure.

Through precise chip selection and layout, packaging, testing and screening processes, we ensure the high-definition, high-brightness and stable performance of the display.

This technology improves the display effect of LED displays and simplifies the production process. It is an important breakthrough in the field of ultra-high-definition displays.

What is COB LED display

COB LED display (Chip-On-Board LED Display) is an LED display technology that uses chips directly packaged on the substrate.

Different from the traditional SMD (Surface Mounted Device) packaging method, COB technology directly pastes the LED chip on the metal substrate, and achieves a tight combination of the LED chip and the substrate through a specific packaging process.

This technology enables the display to have higher integration, better heat dissipation performance and lower dead light rate.

COB LED display features

High integration

Since the LED chip is directly packaged on the substrate, the COB LED display has a higher degree of integration and smaller pixel pitch, which can present a more delicate and clearer image.

Excellent heat dissipation performance

The direct contact between the chip and the substrate increases the heat dissipation area, making the heat dissipation performance of the COB LED display better than that of traditional packaging methods, thereby extending the service life of the display.

Low dead light rate

The COB packaging method reduces the welding process during the packaging process, reduces the dead light rate caused by poor welding, and improves the reliability of the display.

High contrast and brightness

Due to the close combination of the chip and the substrate, the COB LED display has higher contrast and brightness, making the picture more vivid and vivid.

COB LED display process flow

The process flow of COB LED display mainly includes the following steps:

Material Preparation

Including metal substrates, LED chips, packaging materials, wires, etc.

Substrate processing

Clean and deoxidize the metal substrate to improve the cleanliness and smoothness of the substrate surface.

Chip Pasting

Paste the LED chip on the substrate to ensure accurate positioning and arrangement of the chip.

Soldering and packaging

Welding and packaging are performed using specific processes to protect the chip and provide the necessary optical effects.

Testing and Screening

Conduct photoelectric parameter testing on the packaged LED units to ensure compliance with standard requirements.

COB LED display cabinet material

COB LED display cabinet materials mainly include metal frames, heat dissipation systems, protective covers, etc. The metal frame is used to support and fix the display screen, and the heat dissipation system is responsible for discharging the heat generated by the display screen in a timely manner to prevent excessive temperature from affecting the display performance. The protective cover is used to protect the display screen from damage from the external environment.

COB LED display manufacturing equipment

Manufacturing equipment for COB LED displays includes die bonding machines, wire bonding machines, packaging equipment, testing equipment, etc. These devices are used to implement processes such as pasting, welding, packaging and testing of LED chips. With the continuous advancement of technology, the automation and precision of these equipment are also constantly improving, providing a strong guarantee for the mass production of COB LED displays.

COB LED display screen vs. SMD LED display screen

Compared with SMD LED displays, COB LED displays show advantages in many aspects. First of all, in terms of display effects, COB LED displays have higher pixel density and better color performance capabilities, which can present more delicate and clearer images.

Secondly, in terms of heat dissipation performance, the heat dissipation performance of COB LED display is better than that of SMD LED display, which helps to extend the service life of the display.

In addition, COB LED displays also have lower dead light rates and higher reliability.

Application scenarios

COB LED displays are widely used in many fields due to their high pixel density, high brightness, and high contrast.

In digital signage

COB LED display can be used for navigation and information prompts in airports, stations, hospitals and other places;

In the field of commercial advertising

COB LED displays can be used for advertising in shopping malls, supermarkets and other public places;

In the field of stage performance

COB LED display can be used for background screen display in concerts, concerts and other performance occasions.

SMD LED displays are more used in situations where the display effect is not so demanding.

To sum up, COB LED display technology has many advantages and is widely used in many fields. With the continuous advancement of technology and the continuous development of the market, COB LED displays will continue to play an important role in the future.

COB LED display products

Currently, we have two COB LED display products on the shelves, namely the New indoor flip-chip COB LED display screen P0.78 P0.93 P1.25 specifications and P0.78125 P0.9375 P1.25 COB LED display screen.

The new COB LED display product uses advanced COB (Chip-On-Board) packaging technology, which integrates LED chips directly on the PCB board, thereby achieving higher integration and a more compact structure. The new COB LED display products have excellent performance in many aspects.

First of all, the new COB LED display has ultra-high resolution and excellent color performance capabilities. Due to its highly integrated design, the pixel pitch of the display screen has been greatly reduced, which greatly increases the pixel density, thereby presenting a more delicate and clear image. At the same time, advanced color processing technology enables the display to present more vivid and realistic colors, bringing users a more shocking visual experience.

Secondly, the brightness and contrast performance of the new COB LED display are also very good. The high-brightness design allows the display to remain clearly visible in bright environments, while the high contrast ratio makes images more layered and details more prominent.

In addition, the new COB LED display also has excellent heat dissipation performance. Through reasonable heat dissipation design and high-quality material selection, the display can effectively dissipate heat during work, ensuring long-term stable operation without overheating.

Finally, the new COB LED display also performs well in energy conservation and environmental protection. The use of low-power design and environmentally friendly materials allows the display to reduce energy consumption while also reducing environmental pollution.

To sum up, the new COB LED display products have a wide range of applications in digital signage, commercial advertising, stage performances and other fields with their high integration, high resolution, high brightness, high contrast, excellent heat dissipation performance, energy saving and environmental protection. Application prospects.

Old COB LED display vs. New COB LED display

There are significant differences between the old COB LED display and the new COB LED display in many aspects. The differences between the two in terms of main features, display effects, durability, and application prospects will be compared in detail below.

First of all, from the perspective of main characteristics, although the old COB LED display has adopted COB packaging technology, the packaging process and material use may be relatively simple.

The new COB LED display has made more optimization and innovation in packaging technology and adopted more advanced materials and processes, thus improving the overall performance and reliability of the product.

This improvement has resulted in significant improvements in pixel density, brightness and contrast of the new display, while also enhancing the product’s waterproof performance and durability.

Secondly, in terms of display effect, the new COB LED display has a more delicate and realistic picture performance than the old model. This is due to the improvement in pixel density and color reproduction of the new display screen, making the picture clearer and the colors more vivid.

At the same time, the brightness and contrast of the new display have also been optimized, allowing it to maintain excellent display effects even in outdoor strong light environments.

In addition, in terms of durability, the new COB LED display adopts a more stringent waterproof and dustproof design, allowing it to operate stably for a long time in harsh outdoor environments. Although older displays also have certain waterproof properties, there may be certain risks when facing extreme weather conditions.

Finally, in terms of application prospects, the new COB LED display, with its excellent performance and stability, has broader application prospects in outdoor advertising, urban landscapes, sports venues and other fields. Although old display screens also have certain applications in these fields, their competitiveness may gradually weaken as technology continues to advance and market demand increases.

To sum up, the new COB LED display has been significantly improved compared to the old model in terms of main features, display effects, durability and application prospects. However, the specific choice of which display screen needs to be comprehensively considered based on factors such as actual application requirements and budget.

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