JSK technology explains the definition of terms for you

 video display system

It is composed of video display system, transmission system, control system and auxiliary system, which can realize simultaneous, partial or full screen display of one or more video signals.


2.1.2 video display screen unit


In the video display system, the basic unit that can independently complete the screen display function is rectangle.


2.1.3 video display screen together (wall)


It is physically spliced by the display unit, which is the general name of image display area. Depending on the appropriate electrical connection (including signal transmission path), the display units are controlled by the control system, which can display the video picture alone or a part of the display screen, and can cooperate with other units in the system to form a complete picture.