Tunnel video system adaptive to train speed variation

A tunnel video system comprising:

• a main controller for operating and managing the system, the main controller being connected with exterior networks;
• a plurality of display controllers connected with the main controller so as to receive data;
• a plurality of LED modules driven by the plurality of display controllers;
• and
• a plurality of sensors connected at least one of the plurality of display controllers so as to sense the speed of a moving object,
• in which the plurality of display controllers are divided into a plurality of clusters comprising the display controllers connected with the sensors and the display controllers connected with the main controller, respectively,
• one of the display controllers in each of the clusters is a cluster leader display controller which has the data transmitted to the display controllers included in the same cluster by a data network that comprises a first route connected with the main controller and a second route connected with the rest display controllers included in the same cluster, and
• the display controllers connected with the sensors among the display controllers included in each of the clusters have sensor signals transmitted to the display controllers included in the same cluster by a sensor network that comprises a third route connected with the display controllers included in the same cluster.