Tecnon Smart Display Technology Shenzhen Co., Ltd.
When choosing an LED lamp post screen, the cabinet material is one of the most critical factors that affects durability, weight, heat dissipation, and overall performance. Among the common materials, full cast aluminum and die-cast magnesium aluminum are widely used in the LED display industry. Each has its own advantages and trade-offs, and understanding them helps you make the right choice for outdoor smart display applications.
1. Why Cabinet Material Matters for LED Lamp Post Screens
An LED lamp post screen operates outdoors year-round. It faces challenges such as sunlight exposure, temperature changes, wind, and rain. The cabinet serves not just as a structure, but also as a protective shell, heat conductor, and installation base.
A good cabinet material ensures:
- Long-term structural stability
- Efficient heat dissipation
- Light weight for pole installation
- Corrosion resistance and weatherproofing
If the cabinet material is too heavy, it increases pole load and installation difficulty. If it lacks heat dissipation, internal components may overheat, shortening LED lifespan.
2. Overview of Full Cast Aluminum Cabinets
Full cast aluminum cabinets are made through integrated casting, where the entire structure is formed as one solid piece. This process produces a strong, dense frame with high dimensional accuracy and excellent corrosion resistance.
Key advantages:
- High strength and rigidity: Excellent stability for large-size LED screens.
- Superior heat dissipation: Aluminum’s thermal conductivity allows quick heat transfer.
- Corrosion and oxidation resistance: Ideal for humid or coastal environments.
- Seamless appearance: The integrated mold design ensures smooth cabinet lines and minimal gaps.
Limitations:
- Heavier weight: Compared to magnesium alloys, full cast aluminum is denser, increasing the total load on the lamp pole.
- Higher production cost: Requires more material and longer casting cycles.
Because of its stability and weather resistance, full cast aluminum is often used in large-format LED lamp post screens and projects requiring long-term durability.
3. Overview of Die-Cast Magnesium Aluminum Cabinets
Die-cast magnesium aluminum combines the lightness of magnesium with the strength of aluminum. It’s made using high-pressure die casting, resulting in a smooth surface and precise structural dimensions.
Key advantages:
- Lightweight: 20–30% lighter than full cast aluminum, reducing pole stress and simplifying installation.
- Good strength-to-weight ratio: Offers adequate rigidity while remaining easy to handle.
- Fast production: Die-casting efficiency is higher, suitable for mass production.
- Excellent appearance: Smooth surface allows modern, slim designs.
Limitations:
- Lower corrosion resistance: Magnesium can oxidize faster if not properly coated.
- Slightly lower heat dissipation: Compared with full cast aluminum, it transfers heat less efficiently.
This makes die-cast magnesium aluminum a good choice for medium and small-size LED pole screens or projects where weight reduction is a priority.
4. Technical Comparison: Full Cast Aluminum vs. Die-Cast Magnesium Aluminum
| Feature | Full Cast Aluminum | Die-Cast Magnesium Aluminum |
|---|---|---|
| Density | Higher (heavier) | Lower (lighter) |
| Strength | Very high | Moderate to high |
| Heat Dissipation | Excellent | Good |
| Corrosion Resistance | Excellent | Moderate |
| Weight | Heavier | 20–30% lighter |
| Cost | Higher | Lower |
| Appearance | Seamless, premium | Sleek, modern |
| Best Application | Large or long-term installations | Medium or lightweight projects |
If your project emphasizes heat dissipation, durability, and stability, full cast aluminum is more reliable. If your focus is lightweight design and easy installation, die-cast magnesium aluminum is a cost-effective solution.
5. Application Scenarios and Recommendations
- Urban Smart Light Poles:
For poles with multiple devices (cameras, sensors, and displays), weight is crucial. Die-cast magnesium aluminum reduces pressure on the pole and simplifies maintenance. - Coastal or High-Humidity Areas:
Full cast aluminum is preferable because of its superior corrosion resistance and oxidation protection. - High-Brightness Advertising Screens:
When the screen runs at 6000 nits or higher brightness, heat buildup is a real issue. Full cast aluminum handles thermal management more efficiently. - Short-Term or Temporary Installations:
For temporary displays, exhibition setups, or smaller screen sizes, die-cast magnesium aluminum offers a lighter and more flexible option.
Ultimately, both materials perform well when manufactured properly. The best choice depends on your environmental conditions, installation structure, and budget priorities.
6. Additional Factors to Consider
When selecting an LED lamp post screen, the cabinet material is just one aspect. You should also evaluate:
- Brightness (≥7000 nits) for sunlight visibility
- IP65 waterproof rating for outdoor reliability
- Smart control system for remote content and brightness management
- Power efficiency and thermal design to extend component life
Working with a reliable LED display manufacturer ensures the materials, assembly, and sealing techniques all meet professional outdoor standards.
Conclusion
Both full cast aluminum and die-cast magnesium aluminum have clear roles in modern LED lamp post screen design. Full cast aluminum offers superior durability, heat management, and corrosion resistance, making it ideal for long-term, high-demand applications. Die-cast magnesium aluminum, on the other hand, provides lightweight performance and cost efficiency, making it great for small or medium-sized installations.
The smart choice depends on your environment, structural constraints, and maintenance requirements. By balancing weight, strength, and heat performance, you can ensure your LED lamp post screen delivers stable, efficient, and eye-catching performance for years.