COB LED Display Screen Advantages and Disadvantages

Understanding COB LED:

The term COB stands for chip on board, which involves a manufacturing technique where integrated circuits are directly wired and bonded to a printed circuit board. This setup consists of LED lamps positioned at the front and drive ICs located at the back, creating a complete COB LED module essential for LED displays.

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The encapsulation of COB LEDs effectively merges advanced LED chip technology, encapsulation, and display technologies. Consequently, the versatility of COB LED displays emerges from the close cooperation across these technology stages.

Advantages of COB LED Technology:

COB LED technology showcases several advantages:

• R&D: The absence of a specific diameter for individual LEDs allows for even finer micro designs theoretically.
• Technical craftsmanship: Costs associated with COB LED holders are significantly reduced, streamlining the production process and lowering the thermal resistance of the LED chip while achieving high-density packaging.
• Project installation: The installation process for COB LED modules is quicker and more straightforward.

Key Features:

1. Ultra slim: PCBs ranging from 0.4mm to 1.2mm thickness can be customized to meet client specifications, making the overall weight approximately one-third lighter than traditional displays. This reduction helps lower transportation costs and project structural steel expenses.
2. Anticollision and Crush Resistance: LED chips are encapsulated on the PCB, solidified using epoxy resin which creates a spherical surface, enhancing durability.
3. Wide Viewing Angle: The viewing angle extends to about 180°.
4. Effective Heat Dissipation: The design enables efficient heat dissipation due to the PCB's copper foil. The strict control of copper foil thickness, coupled with immersion gold technology, reduces luminosity attenuation, thereby extending the lifespan of the display.
5. Ease of Cleaning: Dust on the COB LED can be easily removed with just water and a cloth.
6. Equipped with waterproof, damp proof, anticorrosion, dustproof, anti-static, and anti-oxidation features, it operates efficiently within -30°C to +80°C.

Challenges Facing COB LED:

Despite its advantages, COB LED technology faces some challenges:

• Low passing rate due to one-time encapsulation, leading to higher maintenance costs.
• Inferior homogeneity when compared to SMD LED displays.
• The reliance on solid crystal and wire solder craftsmanship, resulting in numerous complications during production.
• Higher production costs relative to SMD types due to elevated failure rates.

Conclusion:

While advancements in COB LED technology are noteworthy, SMD LED remains the preferred choice for P1 displays and above. Currently, COB LED displays are primarily suitable for P1 pixel pitch types, indicating potential for future applications.

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