A display device according to one embodiment of the invention includes a display panel for displaying an image and an optical filter attached to the display panel. The optical filter includes an external light anti-reflection layer, a color compensation layer, an external light shielding layer, and an electromagnetic interference (EMI) shielding layer. The external light shielding layer includes a barrier rib unit including black photoresist at a gap between the EMI shielding layer and the external light anti-reflection layer or the color compensation layer, for partitioning the gap.