In recent years, in large-scale shopping malls or activities, we always see the figure of "LED fan". Its appearance is similar to the fan, but it can display various patterns when rotating, and some can display dynamic 3D patterns, which is very cool. Every time we see it, we can always make people stop and watch it, which plays a very good role in publicity and promotion. So how do LED fans display patterns?
Strictly speaking, this so-called "fan" is just a vivid way to call it. In fact, it is a kind of "rotating LED light bar", and its professional name is holographic 3D smart glare screen. After power on, the "fan blade" starts to rotate, which can present a 3D image at the same time, cool and lifelike. At the same time, according to the size and color of the pattern, the LED fan can well hide its leaves, because there is no frame and no fixed screen, so the dynamic picture is like floating in the air, very realistic.
The 3D smart screen not only uses the hardware of rotating LED, but also uses the visual persistence of human eyes. For the hardware equipment of rotating LED, simply speaking, it is to calculate the change frequency of LED light according to the rotation speed of "fan blade". When different LED lights are lit at different times, different patterns will appear. The so-called visual persistence refers to that when the human eye is observing the scene, the light signal is transmitted to the brain nerve, which takes a short period of time. After the end of the role of light, the visual image does not disappear immediately, and the human eye can still maintain its image for about 0.1-0.4 seconds. This kind of residual vision is called "afterimage". The visual phenomenon is called "visual persistence", and the single product can be unique. Vertical display effect can also display the overall effect in combination.
3D holographic fan screen application: shopping malls, brand stores, stores, airports, etc. A good choice to reflect brand effect and brand grade
Principle of 3D holographic screen: Generally speaking, one or more strings of LED lights are arranged on the fan blades. Here, it is assumed that there are 20 LED lights, which are numbered 1-20 at a time from the axis to the edge of the fan blades. In order to explain the principle briefly, we assume that when the fan speed is 60 laps per minute (in reality, the speed is much higher), the human eye will have visual persistence. Let's assume that the LED light is 0 degrees above the fan in 0 seconds. If you want to display the effect of 6:00 on the fan, the minute hand needs to point to the top and the hour hand needs to point to the bottom. It is necessary to turn on the number 1-20 to display minute hand in 0 second, turn on the number 1-10 to display hour hand in 0.5 second, turn on the number 1-20 to display minute hand in 1 second, turn on the number 1-10 to display hour hand in 1.5 second, and so on, so that the human eye will receive a complete picture of the clock at 6:00. For complex patterns, LED fans will have more complex structure and programming equipment. Through the combination of LED light bar rotation and visual persistence, people will see a dynamic 3D picture of the rotating LED fan.
3D holographic fan screen structure: the screen body mainly has light bars and, according to different ones, some have two. Add rotary motor, built-in 3D holographic system and information receiving system.
At present, the main application of 3D smart screen is advertising. Because of its editability and realistic display effect, it is believed that in the near future, it will be applied in more fields.
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Intel ushered in the most important partner in the mobile chip field: Samsung. For Intel, this is an important opportunity, but it is also a big bet. Intel must do everything.
U.S. technology website VentureBeat confirmed yesterday by "information sources" that there will be at least one Samsung Galaxy Tab Tablet PC that will use the Intel Atom chip. Currently Samsung and Intel have not publicly commented on this news.
Samsung's cooperation with Intel's mobile chips is not limited to tablet computers. Samsung smartphones equipped with Intel's mobile chips are also being planned, and even Samsung's star product line, the Galaxy S series and the Galaxy Note series.
For Intel, even if only one Samsung Android tablet carries its Atom chip, this will be a significant milestone for the chip maker in the mobile space.
Five years ago, Intel developed the Atom series chips, which were initially used only for low-end PC products such as netbooks. Last year, Intel successfully brought the Atom chip into the mobile market, thus winning the “proof†campaign.
Prior to this, ARM camp's manufacturers have been sacrificing this PC chip giant, thinking that its chip power consumption is high, and it can't be applied to mobile terminals such as tablet PCs and smart phones at all.
At present, Intel has already “alliance†with Lenovo, ZTE, ASUS and other global players in the mobile space. Although these companies are gradually gaining ground in the mobile device market, they cannot be classified in the first-line vendors occupied by Apple and Samsung. . At the same time, products such as Intel and Lenovo Group have not produced any outstanding sales in the market.
In short, Intel cannot rely on these vendors to truly increase its brand and visibility in the mobile chip space. However, Samsung's recognition may bring a leap forward. Because nowadays Samsung is not only the world's largest smart phone manufacturer, but also the world's second largest manufacturer after Apple in the field of tablet PCs. It has a very high influence in the mobile field. 
