A display apparatus comprising: a substrate in which a first area (AR1, AAR1) and a second area (AR2, AAR2) are defined, wherein the first area (AR1, AAR1) includes a plurality of first pixel areas (PXAR1, PPXAR1) arranged at a first pitch (pt1) in a first direction, and the second area (AR2, AAR2) includes a plurality of second pixel areas (PXAR2, PPXAR2) arranged at a second pitch (pt2) less than the first pitch (pt1) in the first direction, a first insulating layer (IL1, IIL1) disposed on the substrate and defining a plurality of first trenches (tr1, ttr1) and a plurality of second trenches (tr2, ttr2) therein, wherein the plurality of first trenches (tr1, ttr1) correspond to boundaries among the plurality of first pixel areas (PXAR1, PPXAR1), respectively, and are arranged in the first direction, and the plurality of second trenches (tr2, ttr2) correspond to boundaries among the plurality of second pixel areas (PXAR2, PPXAR2), respectively, and are arranged in the first direction; a plurality of first pixel separation films (PSL1, PPSL1) buried in the plurality of first trenches (tr1, ttr1), respectively, and comprising a material different from the first insulating layer (IL1, IIL1); and a plurality of second pixel separation films (PSL2, PPSL2) buried in the plurality of second trenches (tr2, ttr2), respectively, and comprising a material different from the first insulating layer (IL1, IIIL1), characterized in that the plurality of first pixel areas (PXAR1, PXAR1) are arranged in a second direction crossing the first direction at a third pitch (pt3), and the plurality of second pixel areas (PXAR2, PPXAR2) are arranged in the second direction at a fourth pitch (pt4) that is substantially the same as the third pitch (pt3). a substrate in which a first area (AR1, AAR1) and a second area (AR2, AAR2) are defined, wherein the first area (AR1, AAR1) includes a plurality of first pixel areas (PXAR1, PPXAR1) arranged at a first pitch (pt1) in a first direction, and the second area (AR2, AAR2) includes a plurality of second pixel areas (PXAR2, PPXAR2) arranged at a second pitch (pt2) less than the first pitch (pt1) in the first direction, a first insulating layer (IL1, IIL1) disposed on the substrate and defining a plurality of first trenches (tr1, ttr1) and a plurality of second trenches (tr2, ttr2) therein, wherein the plurality of first trenches (tr1, ttr1) correspond to boundaries among the plurality of first pixel areas (PXAR1, PPXAR1), respectively, and are arranged in the first direction, and the plurality of second trenches (tr2, ttr2) correspond to boundaries among the plurality of second pixel areas (PXAR2, PPXAR2), respectively, and are arranged in the first direction; a plurality of first pixel separation films (PSL1, PPSL1) buried in the plurality of first trenches (tr1, ttr1), respectively, and comprising a material different from the first insulating layer (IL1, IIL1); and a plurality of second pixel separation films (PSL2, PPSL2) buried in the plurality of second trenches (tr2, ttr2), respectively, and comprising a material different from the first insulating layer (IL1, IIIL1), characterized in that the plurality of first pixel areas (PXAR1, PXAR1) are arranged in a second direction crossing the first direction at a third pitch (pt3), and the plurality of second pixel areas (PXAR2, PPXAR2) are arranged in the second direction at a fourth pitch (pt4) that is substantially the same as the third pitch (pt3). <EOS>