A light emitting display device, comprising: a substrate including a plurality of pixels having an opening area (OA); an overcoating layer on the substrate and including an uneven portion having a plurality of protruding portions in the opening area (OA); and a light emitting element (ED) over the uneven portion , wherein the light emitting element (ED) comprises a first electrode (E1) on the plurality of protruding portions , a light emitting layer (EL) on the first electrode (E1), and a second electrode (E2) on the light emitting layer (EL), wherein: each of the plurality of protruding portions includes: a bottom portion ; a top portion having a sharp structure over the bottom portion ; and a curved portion between the top portion and the bottom portion , the curved portion of each of the plurality of protruding portions includes a first tangent slope at a half height of a total height from the bottom portion to the top portion and a second tangent slope at 4/5 of the total height, and wherein the second tangent slope is greater than the first tangent slope, characterised in that a 4/5 height aspect ratio at the 4/5 of the total height from the bottom portion to the top portion is within a range from 0.35 to 0.6, inclusive, wherein the 4/5 height aspect ratio is defined as (4H/5)/(F'/2), wherein H is the total height and F' is the width of the protruding portion at the 4/5 of the total height. a substrate including a plurality of pixels having an opening area (OA); an overcoating layer on the substrate and including an uneven portion having a plurality of protruding portions in the opening area (OA); and a light emitting element (ED) over the uneven portion , wherein the light emitting element (ED) comprises a first electrode (E1) on the plurality of protruding portions , a light emitting layer (EL) on the first electrode (E1), and a second electrode (E2) on the light emitting layer (EL), wherein: each of the plurality of protruding portions includes: a bottom portion ; a top portion having a sharp structure over the bottom portion ; and a curved portion between the top portion and the bottom portion , the curved portion of each of the plurality of protruding portions includes a first tangent slope at a half height of a total height from the bottom portion to the top portion and a second tangent slope at 4/5 of the total height, and wherein the second tangent slope is greater than the first tangent slope, characterised in that a 4/5 height aspect ratio at the 4/5 of the total height from the bottom portion to the top portion is within a range from 0.35 to 0.6, inclusive, wherein the 4/5 height aspect ratio is defined as (4H/5)/(F'/2), wherein H is the total height and F' is the width of the protruding portion at the 4/5 of the total height. a bottom portion ; a top portion having a sharp structure over the bottom portion ; and a curved portion between the top portion and the bottom portion , the curved portion of each of the plurality of protruding portions includes a first tangent slope at a half height of a total height from the bottom portion to the top portion and a second tangent slope at 4/5 of the total height, and wherein the second tangent slope is greater than the first tangent slope, characterised in that a 4/5 height aspect ratio at the 4/5 of the total height from the bottom portion to the top portion is within a range from 0.35 to 0.6, inclusive, wherein the 4/5 height aspect ratio is defined as (4H/5)/(F'/2), wherein H is the total height and F' is the width of the protruding portion at the 4/5 of the total height. <EOS>