Patent ID: 8508431

Claim:
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.