A light emitting display device, comprising: a substrate including a plurality of pixels having an opening area; an overcoating layer on the substrate and including an uneven portion having a plurality of protruding portions in the opening area; and a light emitting element over the uneven portion, wherein the light emitting element comprises a first electrode on the plurality of protruding portions, a light emitting layer on the first electrode, and a second electrode on the light emitting layer, 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; an overcoating layer on the substrate and including an uneven portion having a plurality of protruding portions in the opening area; and a light emitting element over the uneven portion, wherein the light emitting element comprises a first electrode on the plurality of protruding portions, a light emitting layer on the first electrode, and a second electrode on the light emitting layer, 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.