Car Led Display is a set of display system that is independent with the rapid development of Led Display . Compared with ordinary door head screen and fixed and non-moving LED display, it is stable, anti-interference, anti-vibration , Dust and other requirements are higher. LED display screens are classified in different ways. The following describes its classification from four aspects:
1. Classification according to lamp bead spacing
1. P6: The lamp bead spacing is 6mm, generally used in taxi advertising screens, with delicate display and visual distance of 10-50m
2. P7.62: The horizontal distance is 6mm, the vertical distance is 7.62mm, and the viewing distance is 30-80m
3. P10: The lamp bead spacing is 10mm, which is widely used in bus screens
2. Classification by color
1. Monochrome: generally has the colors of red, yellow, blue, green, and white lights, and is mainly used for displaying advertisements on the top of taxis, and displaying road sign information on the front and back sides of buses;
2. Two-color: One screen has two colors, mainly used for bus function screen; full color: also known as Color Screen , mainly used to display full-color advertising information for other types of car body, most of the area is relative to single and double color The car screen is larger and the production cost is higher, but the advertising effect is better.
3. Classification by carrier
1. Taxi LED walking screen: taxi top screen / rear window screen, LED strip screen for scrolling text, mostly in single and double colors, most of them display some text information to scroll advertisement information.
2. Large truck Led Screen : the main body of the truck is converted into an LED display, and the full-color picture is displayed in high-definition highlights. It can be displayed on the periphery of the car body with high protection levels such as waterproof and anti-sunlight LED displays. High-definition full-Color Display of advertising information, richer display to achieve a more intuitive impression to passers-by on the roadside.
3. Bus LED display: mainly used to display street signs on buses, and mostly in single and double colors.
4. Classification by way of advertising
1. Serial type / U disk type: When the number of cars is small, or the content of the word is not changed frequently, such as the bus station platform display. When changing the content of the text in the screen, you need to connect the computer to change with a serial cable, or save the content to be changed into the U disk to save, and then plug it into the USB interface of the screen. (However, there can be no other content in the U disk)
2. GPRS type: When the car reaches a certain number, it will be very troublesome to change the content of the words one by one. Or it would be very troublesome to change the content of the word frequently, so directly using the computer remote control will bring more convenience to our customers, with less effort.
3. GPS type: The GPS type and the GPRS type are the same in advertising, but other functions of GPS bring a lot of convenience to the taxi company management. In addition, because the GPS will take the satellite time at any time, the GPS-type Led Display Screen is much better than the GPRS-type walking screen in terms of advertising synchronization. GPS type LED car display can be accurate to the second in terms of advertising synchronization.
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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