What we are talking about here is an outdoor media device, which is a large intelligent led display screen. The biggest difference between telescopic screen and telescopic screen is that one can open and merge, and the other can only expand and contract. The screen opening is mainly composed of 12 display screen, 13 motor and several mechanical arms. The telescopic screen is mainly composed of nine led display screens and ten motors. There are many similarities in appearance, but the changes in operation are still very different.

I have seen this kind of retractable screen and retractable screen in Honghai, Shandong. You have to ask them about this detailed technical information and video. The picture below shows the opening and closing screen I found online, and the telescopic screen has not been found yet.