What is 3D LED screen?

At present, 3D LED screen have been widely used in many large shopping malls as a way to attract traffic. Even many 3D LED displays have become a local landmark. So, why can 3D LED displays display What about the shocking three-dimensional picture? Let’s take a look at it next.

Two models of 3D LED display

In the field of 3D LED display, there are two types of 3D models: passive 3D display and active 3D display.

When we usually watch movies with red and blue glasses in the cinema, if we are careful, we can find that

The traditional naked-eye 3D display has a certain visual difference in the video content seen by the left and right eyes of the viewer. Through this color superposition, a 3D effect is formed. This principle is slightly modified and applied to the LED display, thus forming a 3D visual effect.

Distance between points and observation distance
Distance between points and observation distance

At present, many popular naked-eye 3D LED display cabinets are installed through 3D LED screens and combined with the production of creative content to form an immersive experience that is not a naked-eye 3D display in the traditional sense.

The industry believes that this passive naked-eye 3D effect relies too much on other equipment, which will greatly affect people’s enthusiasm. At this time, the active 3D display model comes out. The active 3D display model needs to display the product display effect, installation scene, Creative content is evaluated in three aspects.

SM's 3D LED display
SM’s 3D LED display three-dimensional painting show

Glasses-free 3D displays first appeared in LCD display technology. Multi-viewpoints are formed by gratings or slits to ensure that there is a visual difference between the left and right eyes of the viewer when viewing from the outside, thereby forming a naked-eye 3D LED display effect.

The currently popular naked eye 3D LED display is accurately described as “naked eye 3D LED display effect“. Its essence is the naked-eye 3D effect formed by 2D LED display and special 2D video content. “Internet Memes” is a good example of how the viewing effect of a display device requires a perfect combination of hardware and content.

Glasses-free 3D is a stereoscopic interaction that does not require glasses. The quality of the LED naked-eye 3D display can be judged from the two dimensions of viewing distance and content. In different installation environments, the dot pitch of the display screen determines the viewing angle and viewing distance of the viewer.

The higher the definition of the content, the more video content that can be displayed; in addition, the content design is also critical. The naked-eye parallax video “tailored” according to the display screen makes the audience feel immersive and interactive.

At present, 3D LED large screen realizes naked-eye 3D display. In fact, most of them use the distance, size, shadow effect, perspective relationship, etc. of objects to build a three-dimensional effect in a two-dimensional picture.

As soon as it appeared, the 3D wave screen of the SM building shocked the whole network. Just use the shadow of the background as a static three-dimensional reference line, so that the moving waves have the feeling of breaking through the screen. That is, the display screen folds the screen 90°, using video material that conforms to the principle of perspective, the left screen displays the left view of the image, and the right screen displays the main view of the image.

3D wave screen of the SM building
3D wave screen of the SM building

When people stand in front of a corner and watch, they see objects at the same time. The sides and front of the camera are rendered realistically three-dimensional. However, behind this seemingly stunning display effect, there are countless technical polishing and strong product support.

The naked-eye 3D LED display is to add some optical structures to the display, so that the rendered image enters the left and right eyes of the person to produce parallax, and the 3D picture can be seen without wearing special glasses or other methods. equipment.

There are two types of naked-eye 3D display technologies:

One is Parallax Barrier, which uses linear stripes spaced between light colors and opaque (black) to limit the propagation direction of light, making the image information produce parallax effects;

The other is the cylindrical lens, which uses the focusing and light refraction technology of the cylindrical lens to change the direction of the light to split the light, so that the image information has a parallax effect.

The common disadvantage of the two technologies is that the resolution is halved, so the LED lights need to be doubled, and the parallax barrier technology will reduce the brightness of the stereoscopic display; therefore, the outdoor naked-eye 3D LED display medium is most suitable for the use of small-pitch LED displays.

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