How are 3D Billboards Made?

3D billboards are typically created using a 2D LED or OLED screen that displays two slightly different perspectives of the same image simultaneously. These images are then superimposed to create the illusion of depth for the viewer.

The Process Explained:

Here's a breakdown of how 3D billboards are made:

1. Image Creation:

   • Two versions of the same image are created or captured from slightly different angles. This mimics how our eyes perceive depth by seeing the world from two slightly offset positions.
   • Special software is often used to generate these perspective-shifted images.

2. Display Technology:

   • The billboard itself is usually a high-resolution 2D LED or OLED screen.
   • These technologies are capable of displaying bright, vibrant images and are essential for creating a convincing 3D effect.

3. Image Superimposition:

   • The two images are displayed on the screen in a way that each eye sees a different image. This is often achieved through various methods, including:
     • Parallax Barrier: A barrier with precisely aligned slits is placed in front of the display. These slits direct light from alternating images towards each eye.
     • Lenticular Lenses: A lens array is placed over the display, refracting light from alternating images to each eye.
     • Active Glasses: In some cases, viewers wear special glasses that rapidly shutter each lens, synchronized with the display, to ensure each eye sees the correct image. (While less common for large billboards, this is the technology used in many 3D TVs).
     • Glasses-Free 3D (Autostereoscopic): Newer displays use advanced techniques to create a 3D effect without glasses, often involving complex lens arrangements or parallax barriers.

4. Viewing Angle and Distance:

   • The 3D effect is most convincing within a specific viewing angle and distance range.
   • Billboard designers carefully consider these factors when creating the 3D visuals to ensure the optimal viewing experience for the target audience.

5. Software and Hardware Integration:

   • Specialized software controls the display and manages the rendering and superimposition of the two images.
   • Powerful hardware is required to process and display the high-resolution images at the necessary frame rates.

In essence, 3D billboards leverage our binocular vision (the way our brain processes the images from our two eyes) to create the illusion of depth on a 2D surface. The success of the effect depends on the quality of the images, the display technology, and the viewing angle.