A LED display apparatus is disclosed, in which a LED array (7) arranged according to the shape of patterns or characters to be displayed is fixed on a PCB (3), the LED array is connected to a LED driving controller (6), optical conductive ink (5) is distributed around the LEDs on the PCB (3), above the LEDs and the optical conductive ink (5) is disposed an optical conductive bracket (2) having a cross section corresponding to the shape of the patterns or characters to be displayed, and a diffuser (1) is placed on the top of the optical conductive bracket (2).