Device and method of processing 3-dimension graphic using tile dirty table

PURPOSE: A device and a method of processing a 3D graphic using a tile dirty table are provided to remove a clear processing time and additional processing time for a flush process, thereby lowering the entire memory bandwidth of a device for 3D graphic processing. CONSTITUTION: A device of processing a 3D graphic comprises a rendering unit(100), a frame memory(200), a tile dirty table(400), and an LCD read data selecting unit(500). The rendering unit renders a 3D graphic image according to each tile which is divided from one screen. The tile dirty table stores 1 about a rendered time and 0 for a not rendered tile as a tile dirty value. The LCD read data selecting unit transmits rendering data stored in a frame memory to an LCD controller(300) as LCD_read data of each tile when the tile dirty value is 0 according to each tile and the tile dirty value is 1 according to each tile.