Brilliant LED Production

(English version) The English team West Ham United inaugurated the largest LED display in Europe. It is installed above the front door to attract the attention of visitors and passers-by. With a curved shape, slightly inclined forward, this display measures over a thousand square meters and provides a spectacular digital canvas that supports direct sunlight and displays bright, high contrast and color depth images. The Queen Elizabeth Olympic Park is a sports complex that was built for the 2012 Olympic and Paralympic Games. Located east of London, it hosts several sports venues such as the Aquatic Center and the Olympic Stadium. "We hope this Led screen, the largest in Europe, will become an iconic element for visitors to the Queen Elizabeth Olympic Park. It will serve to inform and entertain our customers while offering added value to our business partners, event sponsors and community groups. Our challenge now is to use this display and get the most out of viewing conte...

Dynamic brightness range, color rendering and contrast of a LED screen Brightness and color rendering on a LED screen An essential parameter of LED screens is an ability to display a certain number of colors. All visible colors result from color mixing of basic colors that make up a pixel, typically, Red (R), Green (G) and Blue (B). Apparently, the more colors a screen may render, the higher the image quality, provided that the colors are natural and color transitions are smooth. Initially, the image is formed on a computer and image quality is evaluated on a PC monitor. The image on a LED screen must be as close to the initial image as possible. A current de-facto standard is a 24-bit color coding (TrueColor) where the brightness value of each channel is presented as a 8-bit number. Thus, ideally, a high quality LED screen should render at least 2 24  colors (or more than 16 million). We already analysed how the image is generated on an LED screen with the ...

Today we tend to take LED video screens for granted. Indeed, they became common features in our towns and we mostly pay attention to their outward quality parameters. But since our magazine specializes in this technology, we believe time has come to spell out major technical principles of modern LED video screens, those principles that ultimately ensure what millions of people see on screens every day. Modern LED video screen is a complex system with enormous number of components. The image quality and operational parameters depend on the quality of each of those components as well as on the functionality of screen control system. The following LED video screen characteristics are essential from the point of view of image quality: LED video screen resolution (so called  spatial  resolution), in LED video screens it is closely related to distance between pixels or pitch size; Maximum brightness (measured in Nits); Dynamic brightness range understood as the numbe...