Led LightS 3D Hologram Fan
In recent years, in large shopping malls or events, you will always see the "LED fan". Its appearance resembles a fan, but it can display a variety of patterns when rotated, and some can display dynamic 3D patterns. It ’s so cool, it always makes people stop and watch it, and it plays a very good role in publicity and promotion. So how does the LED fan display the pattern?
Strictly speaking, this so-called "fan" is just a vivid name. In fact, it is a "rotating LED light bar", and its professional name is called a holographic 3D smart display. After the power is turned on, the "fan blade" starts to rotate, and can display a 3D image while rotating, which is cool and realistic. At the same time, according to the size and color of the pattern, the LED fan can hide its fan blades very well. Because there is no frame and no fixed screen, the dynamic picture is like floating in the air, which is very realistic.
The 3D smart dazzle screen not only utilizes the hardware configuration of the rotating LED, but also utilizes the visual retention phenomenon of the human eye. For the hardware configuration of rotating LEDs, simply speaking, the changing frequency of the LED lights is calculated based on the speed of the "fan blades". When different LED lights are lit at different times, different patterns will appear. The so-called visual persistence phenomenon means that when the human eye is observing scenes, it takes a short period of time for light signals to enter the brain nerves. After the effect of light ends, the visual image does not disappear immediately, and the human eye can continue to maintain its About 0.1 second of the image, this residual vision is called "back image", and this phenomenon of vision is called "visual persistence".