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What is a COB LED screen?

Date:2024-11-01 Views:759

Discover the latest in COB LED screen technology with Haijia Cailiang, an exhibitor at LED CHINA! Ready to experience this innovative technology firsthand?

Join us at LED CHINA 2025 in Shenzhen, taking place from February 17-19!

What is COB LED screen?

COB (Chip on Board) is an LED display packaging technology that is different from traditional LED display technology. COB technology installs multiple LED chips directly on a circuit board, eliminating the need for separate packaging. This technology increases brightness and reduces heat, making the display more seamless.

Advantages compared to traditional LED screens

COB LED screens have obvious advantages over traditional LED screens in terms of performance. It has no gaps between LED chips, ensuring uniform illumination and avoiding problems such as the “screen door effect”. In addition, COB screens offer more accurate colors and higher contrast.

Advantages of COB LED screen

Due to the smaller size of LED chips, the density of COB packaging technology has increased significantly. Compared with surface mount devices (SMD), COB’s arrangement is more compact, ensuring display uniformity, maintaining high intensity even when viewed at close range, and having excellent heat dissipation performance, thereby improving stability and reliability. COB packaged chips and pins enhance air tightness and resistance to external forces, forming a seamless polished surface. In addition, COB has higher moisture-proof, anti-static, damage-proof and dust-proof properties, and the surface protection level can reach IP65.

In terms of technical process, SMD technology requires reflow soldering. When the solder paste temperature reaches 240°C, the epoxy resin loss rate can reach 80%, which can easily cause the glue to separate from the LED cup. COB technology does not require a reflow process and is therefore more stable.

A Closer Look: Pixel Pitch Accuracy

COB LED technology improves the pixel pitch. Smaller pixel pitch means higher pixel density, thus achieving higher resolution. Viewers can see clear images even if they are close to the monitor.

Illuminating the Dark: Efficient Lighting

COB LED technology is characterized by efficient heat dissipation and low light attenuation. The COB chip is directly glued onto the PCB, which expands the heat dissipation area and the light attenuation is far better than that of SMD. The heat dissipation of SMD mainly relies on the anchoring at its bottom.

Expand Horizons: Perspective

COB small-pitch technology brings wider viewing angles and higher brightness, and is suitable for various indoor and outdoor scenes.

Tough Resilience

COB technology is impact-resistant and unaffected by oil, moisture, water, dust and oxidation.

High Contrast

Contrast is an important indicator of LED display screens. COB raises the contrast to a new level, with a static contrast ratio of 15,000 to 20,000 and a dynamic contrast ratio of 100,000.

Green Era: Energy Efficiency

In terms of energy efficiency, COB technology is ahead of SMD and is a key factor in reducing operating costs when using large screens for long periods of time.

Choose Cailiang COB LED screens: the smart choice

As a first-class display supplier, Cailiang Mini COB LED screen has three significant advantages:

Cutting-edge Technology:COB full flip-chip packaging technology is used to greatly improve the performance and production yield of small-pitch LED displays.

Excellent Performance:The Cailiang Mini COB LED display has the advantages of no light crosstalk, clear images, vivid colors, efficient heat dissipation, long service life, high contrast, wide color gamut, high brightness, and fast refresh rate.

Cost-effective:Cailiang Mini COB LED screens are energy-saving, easy to install, require low maintenance, have low associated costs and offer excellent price/performance ratio.

Pixel Accuracy:Cailiang provides a variety of pixel pitch options from P0.93 to P1.56mm to meet the needs of different users.

  • 1,200 nits brightness
  • 22Bit grayscale
  • 100,000 contrast ratio
  • 3,840Hz refresh rate
  • Excellent protective performance
  • Single module calibration technology
  • Comply with industry standards and specifications
  • Unique optical display technology, giving priority to protecting eyesight
  • Suitable for various application scenarios
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