2025-03-24
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In the packaging process of LED displays, wires play a critical role. Among them, gold wires and copper wires serve as the primary materials for connecting chip electrodes to the bracket, directly impacting the performance and lifespan of LED displays. When current flows through the wires into the chip, it drives the chip to emit light, making the quality of these wires essential for ensuring stability and reliability.
Gold Wire Packaging: The Preferred Choice for High-End Applications
Gold wire packaging involves using gold wires to connect the chip electrodes with the bracket. Due to the excellent conductivity and oxidation resistance of gold wires, they are widely used in high-end LED display applications.
Common Application Models:
Typically, gold wire packaging is employed in LED displays that require high performance and long lifespan, such as P5, P3, P2.5, P2, and P1.667 for both indoor and outdoor use. Among these, the P1.667 small-pitch LED display is particularly noteworthy. It features SMD1010 lamp beads with gold wire packaging and high-refresh driver IC, boasting a resolution of up to 360,000 dots/㎡. The cabinet design is lightweight and stylish, with a die-cast aluminum frame and a thickness of just 65 mm. Its splicing ratio is 16:9, offering a superior visual experience with an ultra-wide 170° viewing angle. Such displays are typically used for large outdoor billboards and high-end indoor display settings.
Copper Wire Packaging: A Popular Choice for the Economic Market
In contrast, copper wire packaging is favored for its low cost. Although its conductivity and oxidation resistance are somewhat inferior to gold wire, its economic advantages make it widely adopted in medium and low-end LED displays, especially in mass production.
Typical Application Models:
Copper wire packaging is commonly used in indoor and mid-to-low-end applications, such as P1.25, P1.53, P1.66, P1.86, P2.0, P2.5, P3, and P4. These models are frequently seen in small advertising screens, home entertainment displays, and outdoor applications where cost control is essential, while longevity and reliability requirements are relatively lower.
Key Differences Between the Two Packaging Technologies
Cost Comparison: Gold wire packaging is more expensive due to the use of precious metals, while copper wire packaging significantly reduces costs, often being just one-third or even less of the cost of gold wire.
Oxidation Resistance: Gold wire exhibits outstanding oxidation resistance, maintaining stable connections even in harsh environments. In contrast, copper wire is more susceptible to oxidation, leading to poor contact or performance degradation.
Welding Reliability: Gold wire demonstrates excellent contact reliability at welding points, ensuring stable connections and minimizing risks of cracking or damage. On the other hand, copper wire welding may face issues like crescent cracks, affecting long-term reliability.
Thermal Conductivity: Although copper wire has better thermal conductivity than gold wire, conductivity and oxidation resistance are generally more critical factors in most LED display applications.
Choosing the Right Packaging Technology
The selection of packaging technology should be based on product positioning, cost considerations, and practical application scenarios. For high-end displays or environments that require long-term stable operation, gold wire packaging is undoubtedly the better choice. Conversely, copper wire packaging is more cost-effective for applications with limited budgets or lower stability demands.
Conclusion:
Both gold wire and copper wire packaging have their unique advantages and play significant roles in high-end and economic markets, respectively. With continuous advancements in packaging technology and the emergence of new materials, these two technologies will continue to coexist and innovate in the LED display industry, driving industry growth and transformation.
