Expandable multi-module display apparatus

An expandable multi-module display device comprising:

• a multi-panel including a plurality of flat panel displays;
• a plurality of multi-driving boards installed in the flat panel displays, respectively;
• and
• a data bus line connected to each of the multi-driving boards, wherein the plurality of multi-driving boards are connected serially to each other by the data bus line, in which
• the multi-driving board cuts image data corresponding to an identification code of the multi-driving board, and provides a specific flat panel display with the cut image data corresponding to the multi-driving board itself, and bypasses the remaining image data other than the cut image data to the multi-driving boards of the remaining flat panel displays other than the specific flat panel display by using the data bus line;
• wherein the image data is displayed on the multi panel according to graphic mode or text mode;
• when a current mode is determined to be the graphic mode, smaller-sized image data smaller than the image data displayed on each flat panel is displayed on the multi panel;
• when the current mode is determined to be the text mode, the image data is displayed on the multi panel without any change;
• and
• the data bus line has a shape of zigzag.