What is the contrast level?

It is the difference between the light emitted by the display and the environmental light reflected by the screen surface. The lower the light reflected, the higher the contrast and therefore the cleanliness and naturalness of the images. To increase the contrast, we provided solutions with particular anti-reflex flyers that split the light and reflect it in different directions, increasing the visibility of the screen even in direct sunlight.

What is the refresh rate and why is it important?

The refresh rate indicates the number of times that the image refreshes every second. For example, a PC monitor has a refresh rate of 72 Hertz (Hz) and therefore refresh all the pixels of the screen, from top to bottom, 72 times every second. The refresh rate is fundamental because it determines the image's quality: if it is too low, the human eye can see a flicker that causes headaches and can damage eyes. To provide a comparison, most of the TV monitors have a refresh rate of 50Hz and only few products of the last generation have a 100Hz refresh rate. Lightking Screens - screens have a 300 Hz refresh rate, which is almost triple of the most advanced cathode tube technologies. This measure is ulterior prove of Lightking Screens quality and state-of-the-art technology, a result of years of research in laboratories and in the field.

What is the virtual pixel technology?

The Virtual Pixel is a technology of image management that allows visualizing pictures of a definition higher than the physical one, thanks to a technique called "pixel interpolation". Lightking Screens Virtual Pixel technology is able to control every single LED: this particular and exclusive screen management feature allows overlying every single pixel to the next one, creating a so-called "virtual pixel" (a pixel that does not exist but is perceptible by the human eye). The screen's definition is one of the characteristics that define images' quality and naturalness: the higher the resolution, the higher the picture's quality will be. Lightking Screens -screens with virtual pixel technology can visualize images with a definition four times higher than the physical definition of the display; therefore, images are more detailed and realistic.

What is the visiblity angle?

The visibility angle of a screen is by convention the angle within which the brightness of a display is equal to the 50% of the frontal luminosity. For example, a screen with 5000 NIT frontal luminosity (NIT = cd/m²) has a visibility angle equal to the angle by which the brightness is reduced to 2500 NIT. This visibility angle can vary depending on the LED and the technical features of the display.

What are the color's temperature and why is it important?

As an international convention defined by the CIE (International Commission of Illumination) states, while evaluating the properties of any source of light, it is used a measure that it takes into account their chromatic content. Such measure of reference is called "color's temperature" and it is expressed in Kelvin degrees (°K). Low levels of color's temperature correspond to color's tones stretching out to the red, while high levels correspond to color's tones stretching out to the blue. In LED screens it is fundamental to keep constant this measure to visualize high quality and naturalness pictures. Lightking Screens, screens are provided with an electronic system of colors' equalization that manages these parameters automatically, depending on the environmental brightness, in order to obtain a constant color temperature both in daylight and at night.

Is it possible to display a video on the LED screens?

Of course yes. LED Screens have their main application field in the live video visualization during concerts, sports events and TV shows. For the video visualization it is important to be aware of the fact that, to obtain a satisfactory quality of the images, it is necessary to utilize a display with a minimum resolution of 192 x 128 pixels. Lightking Screens graphic screens function as huge monitors and they are able to visualize in real-time anything that is visualized on the PC monitor, a DVD or a live performance.

What are the minimum and maximum viewing distances of a LED screen?

The minimum and maximum viewing distances of a LED screen are measured depending on two fundamental characteristics of the screen: the pixel pitch and the screen's dimension. #1 - the minimum distance is calculated converting into meters the pixel pitch. For example, a maxi screen with 10mm pitch has a minimum viewing distance of 10 meters, while a 20mm pitch screen has a minimum viewing distance of 20 meters. #2 - the maximum distance instead, depends on the screen's dimension and it can be calculated multiplying x10 and converting into meters the number of maxi-screen's square meters. For example a 4x3 meters (=12sq) can be viewed from 120 meters distance. While talking about maximum distance, there are two concepts to clarify, "readability" and "visibility". "Readability" identifies the distance within the images broadcasted on the maxi screen are readable, thus clearly recognizable. "Visibility" identifies the distance within the images showed are able to attract the human eye's attention, even if the images are not perfectly identifiable. The visibility of a maxi-screen is usually the double of its readability (in our former example: readability 120 meters = visibility 240 meters). Regarding the written texts, the readability depends on the fonts' size. Generally, it is possible to say that every centimeter can be read from about 5-meter distance. For example, 10 cms texts can be read from about 50 meters.