QML Video Tube and Grille Screen is composed of linear light bar integrated with screen mounting on the building facade. Each linear light bar will be installed separately or in a panel. With such special design without limitation of module size, it breaks through the traditional grille screen technology and could be applicable for any various screen size of building facade. It makes installation more easy and more flexible, meanwhile could save much installation and maintenance cost. It is widley applied for nightime and daytime ultra large area video display of building facade.