LEDs displays are the most efficient of all known light sources, they are also very economical. For example Led display with size of 256 cm x 32 cm, it needs only 220 watts, as two light bulbs!
The controller is set with the following features:
USB output (the easiest and cheapest), you make information and effects for you text line, save them on flash cards. In cramped 3 seconds. After you have inserted flash cards it reboots, and begins to display the new information.
Direct LAN connection to a computer, it’s simple: beat the information and sent on line. (A little more expensive than a USB output)
Control via Wi-Fi. It is used when the wired connection is a possibility. Control via GPRS uses when excluded the possibility of a wired connection.
The sound source is a PC audio output. All you need is to connect sound output at your PC.
Anything! In this case, it all depends on the size of the LED structure (on a small field animation will look bad), and most importantly from the controller, which was installed. Basically, animation and video is played on LED design consisting of full-color RGB modules.
LED screens using 8-bit technology are able to visualize 256 color for each of the three primary colors. This means that they can display a 256 x 256 x 256 = 16.8 million colors in total. LED screens use 16-bit technology reproduce 65,000 colors for each of the three primary colors thus obtained together 65,000 x 65,000 x 65,000 = 280 trillion colors in total.
Many LED screens use a technology known as “virtual pixel pitch.” It is based on sharing LEDs between pixels and in the result, a giant LED screen seems to be with higher resolution. Therefore, when one speaks of a 10 mm virtual pixel step, the screen is likely to have a 20 mm pixel pitch.
It is important to know that the “virtual pixel pitch” does not really effect the image’s quality. For example, a screen with a 10 mm “virtual pitch” will never look as good as an actual 10 mm pitch, so it is always better to buy the smallest pixel pitch that you can afford.
LED screen is similar to a giant television but with one fundamental difference: instead of the image being transmitted via an electron beam tube, it is created by pixels consisting of tiny LEDs. Each pixel on the LED screen consists of a red, green and blue LED, which light up to create the right color. If you look closely you will see a lot of very bright lights, but if you stand back, the picture becomes clear.
From a general point of view, outdoor LED display and indoor LED display difference is in a lower resolution screen street: outdoor screen is generally viewed with greater distance, so they do not need very high resolution. The cost for a larger screen size, thus offset by a lower resolution, it is necessary to ensure good picture quality. Number 2 is weather protection (IP 65 protection class) and the cooling system: outdoor screens have a high degree of protection against moisture and dust, which ensures excellent resistance to the «invasion», characteristic for outdoor use. In addition, a special forced ventilation system ensures that the temperature is kept constant within the screen, and never exceed the critical levels. Number 3 — High Brightness: for outdoor use require high brightness LEDs to be visible under direct sunlight.
LED Screen resolution is the number of pixels contained in 1 m2. It is inversely proportional to pixel pitch: the smaller the distance between pixels, the higher the resolution (because a greater number of LEDs are present on the screen surface). For example, a 20 mm pitch screen has a resolution of 2304 pixels: this value is obtained by dividing the total cabinet length (975 mm) by pixel pitch (in this case 20 mm), resulting in the number of pixels in one line: 975: 20 = 48. Multiplying the number of pixels in one line by the number of lines that can be calculated in the same way, we result in the following equation 48 x 48 = 2,304 pixels in total. Given this formula, we can calculate that the 30 mm pitch screen has a resolution of 1024 pixels, and a 10 mm pitch screen has a resolution of 9216 pixels.
The largest and smallest range for LED screen viewing depends on two basic parameters: pixel pitch and screen size. Maximum distance is calculated by conversing pixel pitch into meters. For example, a screen with a 10 mm pixel pitch (P10) has an optimum viewing distance more than 10 meters, the P20 screen – more than 20 meters, etc. The maximum distance depends on the size of the screen and can be calculated by multiplying by 10 and converting the screen area into meters. For example, we have a 4 × 3 m screen, respectively, its area is 12 m2 and it is optimal for a maximum distance of 120 meters. Speaking of the maximum distance, it is necessary to clarify that there are two parameters: “readability” and “visibility”. “Readability” is determined by distance over which you can read the text on the screen. “Visibility” means the distance over which it is possible to distinguish the image, even if it is not entirely clear. Distance visibility is usually twice the readability distance (for example, if readability is 120 meters, visibility is 240 meters). Readability of course depends on the font size. As a rule, every font centimeter is readable from a 5-meter distance. For example, if the font height is 10 cm, it is readable from 50 meters.
Outdoor LED screens are designed to operate at ambient temperatures from -30 ° C to + 40 ° C without additional cooling or heating. Screens are designed for indoor use are more modest temperature range.