ORGANIC LIGHT-EMITTING DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME
An organic light-emitting display device including an insulating layer having an uneven portion formed in an emission area so as to reduce changes in color characteristics due to a viewing angle, and a method of manufacturing the same. The organic light-emitting display device includes: a substrate including an emission area and a circuit area including at least one thin film transistor (TFT); an insulating layer having a contact hole located at the circuit area, and including an uneven portion located at the emission area, the contact hole exposing the at least one TFT; a first electrode located on the uneven portion and coupled to the at least one TFT through the contact hole; an organic layer located on the first electrode; and a second electrode located on the organic layer.
1 . An organic light-emitting display device comprising:
a substrate comprising an emission area and a circuit area comprising at least one thin film transistor (TFT);
an insulating layer having a contact hole located at the circuit area and comprising an uneven portion located at the emission area, the contact hole exposing the at least one thin film transistor;
a first electrode located on the uneven portion and coupled to the at least one TFT through the contact hole;
an organic layer located on the first electrode; and
a second electrode located on the organic layer.
2 . The organic light-emitting display device of claim 1 , wherein
the uneven portion comprises a plurality of inclined portions located at a plurality of edges of the uneven portion and a center portion located at a center of the uneven portion,
an area of the inclined portions is 40% to 60% of a total area of the uneven portion, and
an area of the center portion is 60% to 40% of the total area of the uneven portion.
3 . The organic light-emitting display device of claim 2 , wherein each of the inclined portions comprises an inclined surface with an angle of 15° to 30° with respect to the substrate, and the center portion comprises an inclined surface with an angle that is equal to or less than 10° with respect to the substrate.
4 . The organic light-emitting display device of claim 3 , wherein the uneven portion has a trapezoidal shape having a protruding cross-section.
5 . The organic light-emitting display device of claim 3 , wherein the uneven portion has a reverse-trapezoidal shape having a depressed cross-section.
6 . The organic light-emitting display device of claim 3 , wherein the uneven portion has a convex curve shape, wherein an inclination angle of a cross-section of the uneven portion decreases from the edges toward the center of the uneven portion.
7 . The organic light-emitting display device of claim 3 , wherein the uneven portion has a concave curve shape, wherein an inclination angle of a cross-section of the uneven portion decreases from the edges toward the center of the uneven portion.
8 . The organic light-emitting display device of claim 2 , wherein the insulating layer comprises a plurality of uneven portions located at the emission area.
9 . The organic light-emitting display device of claim 1 , wherein the first electrode, the organic layer, and the second electrode have a substantially uniform thickness.
10 . The organic light-emitting display device of claim 1 , wherein the uneven portion is a protruding portion or a depressed portion.
11 . A method of manufacturing an organic light-emitting display device, the method comprising:
defining an emission area and a circuit area on a substrate;
forming a thin film transistor (TFT) at the circuit area;
forming an insulating layer at the emission area and the circuit area in which the TFT is formed, so that an uneven portion is formed at a portion corresponding to the emission area;
forming a contact hole to expose the TFT at the circuit area;
forming a first electrode on the uneven portion, the first electrode being coupled to the TFT through the contact hole;
forming an organic layer on the first electrode; and
forming a second electrode on the organic layer.
12 . The method of claim 11 , wherein:
the uneven portion comprises inclined portions located at edges of the uneven portion and a center portion located at center of the uneven portion;
an area of the inclined portions is 40% to 60% of a total area of the uneven portion; and
an area of the center portion is 60% to 40% of the total area of the uneven portion.
13 . The method of claim 12 , wherein each of the inclined portions comprises an inclined surface with an angle of 15° to 30° with respect to the substrate, and the center portion comprises an inclined surface with an angle that is equal to or less than 10° with respect to the substrate.
14 . The method of claim 13 , wherein the uneven portion has a trapezoidal shape having a protruding cross-section.
15 . The method of claim 13 , wherein the uneven portion has a reverse-trapezoidal shape having a depressed cross-section.
16 . The method of claim 13 , wherein the uneven portion has a convex curve shape, wherein an inclination angle of a cross-section of the uneven portion decreases from the edges toward the center of the uneven portion.
17 . The method of claim 13 , wherein the uneven portion has a concave curve shape, wherein an inclination angle of a cross-section of the uneven portion decreases from the edges toward the center of the uneven portion.
18 . The method of claim 13 , further comprising forming a plurality of uneven portions located at the emission area.
19 . The method of claim 11 , further comprising forming the first electrode, the organic layer, and the second electrode to have a substantially uniform thickness.
20 . The method of claim 11 , wherein the uneven portion is a protruding portion or a depressed portion.