Display device with light emitting elements having different widths
The display device is provided. The display device comprises contact electrodes disposed on a substrate, light-emitting elements disposed on the contact electrodes, and an insulating layer defining emission areas corresponded to the light-emitting elements. The light-emitting elements comprise a first light-emitting element that emits a first light having a blue color, a second light-emitting element that emits a second light having a green color, and a third light-emitting element that emits a third light having a red color. A width of the first light-emitting element is greater than a width of the second light-emitting element. The width of the first light-emitting element is greater than a width of the third light-emitting element.
1 . A display device comprising:
contact electrodes disposed on a substrate;
light-emitting elements disposed on the contact electrodes; and
an insulating layer defining emission areas that correspond to the light-emitting elements, wherein
the light-emitting elements comprise:
a first light-emitting element that emits a first light having a blue color;
a second light-emitting element that emits a second light having a green color; and
a third light-emitting element that emits a third light having a red color,
a width of the first light-emitting element is greater than a width of the second light-emitting element,
the width of the first light-emitting element is greater than a width of the third light-emitting element,
each of the light-emitting elements comprises:
a first semiconductor layer
a second semiconductor layer; and
an active layer disposed between the first semiconductor layer and the second semiconductor layer,
the first light-emitting element comprises a first active layer,
the second light-emitting element comprises a second active layer,
the third light-emitting element comprises a third active layer,
each of the first active layer, the second active layer, and the third active layer contains indium,
a content of indium in the first active layer is smaller than a content of indium in the second active layer,
the content of indium in the first active layer is smaller than a content of indium in the third active layer, and
the content of indium in the second active layer is smaller than the content of indium in the third active layer.
2 . The display device of claim 1 , wherein the width of the second light-emitting element is greater than or equal to the width of the third light-emitting element.
3 . The display device of claim 1 , wherein
the emission areas comprise:
a first emission area that corresponds to the first light-emitting element;
a second emission area that corresponds to the second light-emitting element; and
a third emission area that corresponds to the third light-emitting element,
an area of the first emission area is greater than an area of the second emission area, and
the area of the first emission area is greater than an area of the third emission area.
4 . The display device of claim 3 , wherein the area of the second emission area is greater than or equal to the area of the third emission area.
5 . The display device of claim 3 , wherein each of the emission areas has a shape of a circle or a polygon in a plan view.
6 . The display device of claim 3 , wherein
the light-emitting elements comprise a fourth light-emitting element that emits the third light, and
the emission areas comprise a fourth emission area that corresponds to the fourth light-emitting element.
7 . The display device of claim 6 , wherein
a width of the fourth light-emitting element is equal to the width of the third light-emitting element, and
an area of the fourth emission area is equal to the area of the third emission area.
8 . The display device of claim 7 , wherein the area of the second emission area is greater than or equal to a sum of the area of the third emission area and the area of the fourth emission area.
9 . The display device of claim 1 , wherein the second semiconductor layer is a common layer that extends over the light-emitting elements and is electrically connected commonly to the light-emitting elements.
10 . The display device of claim 1 , further comprising:
connection electrodes disposed between the contact electrodes and the light-emitting elements,
wherein the light-emitting elements are electrically connected to the contact electrodes through the connection electrodes.