This is a board, on which the scene name, film name and scene number are usually written, which is common in the shooting scene of film and television works. When a person is saying "start" or "end", he will close the movable wooden bar at the top of the blackboard at the same time, and knock out a sound to indicate the start and stop of the scene being shot.
The scoreboards depicted by different platforms are different, mainly black, gray or green; At the top is a black and white wooden strip, one end of which is fixed with the main board, while the other end can move up and down. This emoticon can represent the slate, and can also represent the film and video shooting.
