How does the LED stage of the Winter Olympics cope with the extreme outdoor environment

The ground screen at the opening of the Beijing Winter Olympics presented a wonderful visual feast to the audience. It is composed of 46,504 50-centimeter-square unit boxes, with a total area of 11,626 square meters. It is currently the largest LED stage in the world.

For example, in the scene where the water of the Yellow River comes from the sky, the water flows straight down from the ice waterfall, and the turbulent waves on the ground screen seem to be rushing towards the face, layer upon layer, giving people a very shocking feeling. The Lidi screen as a whole can present a naked-eye 3D effect. In addition, there is a circle of "black fields" around the ground screen, which is actually a screen. For example, when snowflakes fall, they flip in this area, and the visual effect is that snowflakes are scattered. The ground screen is also equipped with a motion capture interactive system. A camera is installed at the "bowl mouth" of the bird's nest, which can capture the movements of people on the ground screen in real time and realize dynamic capture. Wherever they go, the snow on the ground is pushed away. Another example is the Dove of Peace show. Children play with snow on the ground screen, and there are snowflakes wherever they go. The motion capture system not only optimizes the scene, but also makes the scene more realistic.

"At the opening ceremony of the Winter Olympics, our entire project includes devices such as floor screens, ice waterfalls, ice cubes, north-south stands screens, and playback systems. Multiple display devices display a complete picture as a whole, together with actors, visual effects, and lighting. With the beauty of the dance, it presents a theme of 'pure ice and snow, passionate dating' of the Beijing Winter Olympics." Liu Haiyi, general manager of the Winter Olympics project of Leyard Group, introduced that the entire ground screen LED of the playback system is responsible for displaying 4 units 8K playback materials. The screen is responsible for displaying 2 units 8K playback materials, and IceCube is responsible for displaying 1 unit 8K playback material, and then cooperates with the playback control system to synchronize the video output of multiple players, and the error does not exceed 2 frames.

Leyard has appeared on major occasions such as the 2019 National Day Ceremony, the 2008 Beijing Olympics, the "Great Journey" theatrical performance in the centenary of the founding of the Communist Party, and the previous Spring Festival Gala. Compared with the past, this Winter Olympics opening ceremony used system four backup and pixel four backups to ensure foolproof. System four backup means that each device in the system is designed for quick disassembly structure and plug-in method. In addition to providing necessary spare parts for the system for quick replacement, the control equipment of the LED display system also adopts dual-machine full redundant heat. The backup method ensures that during the operation of the system, once the main device fails, the backup device can be automatically or manually switched online immediately to fully ensure the stable operation of the system without downtime. Pixel quad backup means that each display pixel has pixel backup, one display pixel is backed up with 4 units 3-in-1 SMD lights for each other, and four LEDs are used as one pixel, that is to say, each pixel is four the LEDs are backed up at the same time. If any one LED is damaged, it will not affect the normal display of the individual pixels. If any group of data control chips have problems, the pixels in the LED area of the group will not be completely black. There are 2 units LEDs per pixel for normal display also.

The entire project cycle of the opening ceremony of the Beijing Winter Olympics spans the summer and rainy seasons of July and August in Beijing, and the winter and snow seasons from December to February of the following year. How to ensure that the LED screen can not only experience sunlight exposure and rain erosion, but also bear the autumn sandstorms and winter snow and ice erosion? Li Jun introduced that according to the complex internal and external environment faced by the application of large-area LED display modules at the opening and closing ceremonies, they have researched and developed high-performance LED display modules with waterproof, anti-skid, anti-dazzle, and high load, which can adapt to outdoor In extreme environments such as low temperature and freezing, the LED display and its components all meet the IP66 protection standard, completely preventing the intrusion of foreign objects, and the water intake of the electrical appliance will not have harmful effects when subjected to strong water spray.