Spherical LED Screen Assembly Techniques Explained

Spherical LED screens are becoming more popular as people look for creative and eye-catching visual solutions. Traditional square LED screens are everywhere, so businesses now want something fresh and more immersive. Because of their 360-degree viewing angle and unique 3D look, spherical LED screens stand out in retail stores, exhibitions, airports, and landmark installations.

But how are these spherical LED displays made? Since their shape is very different from standard screens, the modules must be cut, bent, and assembled in special ways to fit the curved structure. Different installation methods also create different final visual effects. This article explains the main assembly techniques used in spherical LED screens and how each method works.

1. Riveting Technique (Pull Riveting)

Pull riveting is one of the core techniques used in spherical LED installation. It is a single-side fastening method that uses a rivet gun to pull a rivet through a pre-drilled hole. As the rivet expands on the opposite side, it locks multiple layers of material together. Finally, the mandrel breaks off, forming a firm and permanent connection.

Why Pull Riveting Works So Well for Spherical LED Screens

• It keeps the sphere surface smooth and unified

A spherical LED screen is built from many small triangular or hexagonal modules. These modules need accurate positioning. Rivets can be installed from different angles, making it easier to align modules without shifting. As a result, the sphere stays smooth and consistent.

• It resists vibration and prevents loosening

Spherical screens often hang in the air or stand on special frames. The force on the structure is uneven. Riveting forms a solid mechanical connection that does not loosen due to temperature changes or vibration. Compared with screws, rivets hold better in long-term outdoor conditions.

• It works well in tight or enclosed areas

Most spherical shells have limited internal space. Technicians often cannot use a screwdriver from inside the sphere. Riveting requires only external operation, making it ideal for confined spaces.

• It improves sealing for outdoor protection

Once tightened, rivets form a small sealing surface. This helps prevent rainwater from entering through the holes. For outdoor spherical LED screens, this greatly enhances waterproof performance.

2. Structural Frame Connection Techniques

Before attaching the LED modules, manufacturers must build the internal frame of the sphere. This frame is usually made of aluminum or steel.

When both sides of a connection point are accessible, high-strength bolts are used to join the frame components. This method is stable and allows for precise pre-assembly in the factory. However, bolts are less suitable for the outer shell where only one side is accessible—therefore, they cannot replace the pull-riveting method used on the skin panels or module mounting plates.

3. Additional Supporting Techniques

These supporting methods do not directly function as main connection structures, but they significantly influence the overall performance and appearance of the spherical LED screen.

• Flexible PCB Modules

Some spherical areas feature extremely tight curves. Flexible LED modules work well here because their soft PCB boards allow slight bending.

These modules often include adhesive backs or Velcro for easier installation. Instead of riveting or screwing, they “stick” onto the curved surface, supported by soft ribbon cables for signal transmission.

• 3D-Printed Nodes

For complex connection points—especially where multiple metal profiles meet—manufacturers may use 3D-printed metal or nylon components. These custom nodes help achieve:

more precise angles

lighter structures

better stress distribution

They are later fixed to the frame using bolts or rivets.

• Waterproof Sealing Methods

Waterproofing is also important, especially for outdoor spheres. Common techniques include:

silicone sealing around joints, rivet heads, and screw heads

rubber strips or O-rings at connection areas

These steps help protect the internal electronics from moisture.

Conclusion

Spherical LED displays rely on a combination of techniques to achieve their smooth curves and sturdy structure. Among all methods, pull riveting remains the most widely used and essential technique due to its stability, flexibility, and suitability for one-side operations. With the right combination of riveting, frame assembly, flexible modules, and waterproofing, manufacturers can create visually striking and durable spherical LED screens.

If you want to learn more about LED display technologies or need custom spherical LED solutions, feel free to contact us. Our professional team will help you design and build the right display for your project.

FAQ

Why is pull riveting widely used in spherical LED screens?

Pull riveting allows single-side operation, which is ideal for enclosed spherical structures. It ensures strong connections, resists vibration, prevents loosening, and helps maintain a uniform curved surface.

Can the size and resolution of spherical LED screens be customized?

Yes. Spherical LED displays can be fully customized in diameter, pixel pitch, brightness, and structure based on project requirements.

Can flexible LED modules be used on all parts of the sphere?

Flexible modules work best in areas with very small radiuses or tight curves. They can bend slightly to match the surface, but they are usually combined with regular rigid modules for optimal stability.