US-20260130083-A1 - DISPLAY APPARATUS

Abstract

A display apparatus includes a first area with first sub pixels and a second area outside the first area and including second sub pixels, an over coating layer including a base portion and protrusions that protrude from the base portion and each having an inclined side surface, first electrodes each of which is disposed in each of the first and second sub pixels, each first electrode covering the inclined side surface of the protrusion and the base portion, a bank layer on the protrusions and the first electrodes and exposing a part of the first electrodes, and an organic layer on the first electrodes and the bank layer. An inclination angle of the inclined side surface of the protrusion of the first sub pixels is larger than an inclination angle of the inclined side surface of the protrusion of the second sub pixels.

Inventors

• Sookhee Jeong
• Seongjoo LEE
• Yongmin Kim
• JungSun BAEK
• Yosup SIM

Assignees

• LG DISPLAY CO., LTD.

Dates

Publication Date

20260507

Application Date

20250919

Priority Date

20241104

Claims (20)

1. 1 . A display apparatus, comprising: a substrate including (i) a first area in which a plurality of first sub pixels is disposed and (ii) a second area disposed outside a periphery of the first area and including a plurality of second sub pixels; an over coating layer which is disposed on the substrate and includes a base portion and a plurality of protrusions which protrude from the base portion, each of the plurality of protrusions having an inclined side surface; a plurality of first electrodes each of which is disposed in a respective sub-pixel among the plurality of first sub pixels and the plurality of second sub pixels, wherein each first electrode among the plurality of first electrodes is disposed so as to cover the inclined side surface of a respective protrusion among the plurality of protrusions and to cover a part of the base portion adjacent to the respective protrusion; and a bank layer which is disposed on a top surface of the plurality of protrusions and the plurality of first electrodes and exposes a part of each of the plurality of first electrodes disposed on the base portion, wherein an inclination angle of the inclined side surface of the protrusion of each of the plurality of first sub pixels is larger than an inclination angle of the inclined side surface of the protrusion of each of the plurality of second sub pixels.
2. 2 . The display apparatus according to claim 1 , wherein the each sub-pixel among the plurality of first sub pixels and the plurality of second sub pixels includes: a first emission area corresponding to an area where a respective first electrode among the plurality of first electrodes is exposed from the bank layer; a first non-emission area outside a periphery of the first emission area and corresponding to an area where the bank layer is disposed on the respective first electrode on the base portion; and a second emission area which outside a periphery of the first non-emission area and corresponding to the side surface of the respective protrusion among the plurality of protrusions, and in a plan view, an area of the second emission area of each of the plurality of first sub pixels is smaller than an area of the second emission area of each of the plurality of second sub pixels.
3. 3 . The display apparatus according to claim 2 , wherein an area of the first emission area of each of the plurality of first sub pixels is larger than an area of the first emission area of each of the plurality of second sub pixels.
4. 4 . The display apparatus according to claim 2 , wherein the each sub-pixel among the plurality of first sub pixels and the plurality of second sub pixels further includes a second non-emission area which corresponds to a top surface of the respective protrusion and is disposed outside a periphery of the second emission area.
5. 5 . The display apparatus according to claim 4 , wherein in the plan view, a size of an area enclosed by a boundary line of the second emission area and the second non-emission area of each of the plurality of first sub pixels is smaller than a size of an area enclosed by a boundary line of the second emission area and the second non-emission area of each of the plurality of second sub pixels.
6. 6 . The display apparatus according to claim 1 , wherein an extending length in a direction parallel to the substrate of the inclined side surface of the protrusion disposed in each of the plurality of first sub pixels is shorter than an extending length in the direction parallel to the substrate of the inclined side surface of the protrusion disposed in each of the plurality of second sub pixels.
7. 7 . The display apparatus according to claim 1 , wherein a lower width of an area defined between adjacent protrusions corresponding to the first electrode in each of the plurality of first sub pixels is larger than a lower width of an area defined between adjacent protrusions corresponding to the first electrode in each of the plurality of second sub pixels; and an upper width of the area defined between the adjacent protrusions corresponding to the first electrode in each of the plurality of first sub pixels is smaller than an upper width of the area defined between the adjacent protrusions corresponding to a first electrode in each of the plurality of second sub pixels.
8. 8 . The display apparatus according to claim 1 , wherein the bank layer includes a plurality of banks, and wherein an upper width of an area defined between adjacent banks corresponding to the first electrode in each of the plurality of first sub pixels is smaller than an upper width of the area defined between the adjacent banks corresponding to the first electrode in each of the plurality of second sub pixels; and a lower width of the area defined between the adjacent banks corresponding to the first electrode in each of the plurality of first sub pixels is larger than a lower width of the area defined between the adjacent banks corresponding to the first electrode in each of the plurality of second sub pixels.
9. 9 . The display apparatus according to claim 1 , wherein the first area is a flat area and the second area is a curved area in which a slope of the second area increases with increasing distance from the first area.
10. 10 . The display apparatus according to claim 1 , further comprising: an organic layer disposed on the plurality of first electrodes and the bank layer.
11. 11 . The display apparatus according to claim 10 , further comprising: a second electrode disposed on the organic layer.
12. 12 . A display apparatus, comprising: a substrate including (i) a first area in which a plurality of first sub pixels is disposed and (ii) a second area disposed outside a periphery of the first area and including a plurality of second sub pixels; an over coating layer which is disposed on the substrate and includes a base portion and a plurality of protrusions which protrude from the base portion, each of the plurality of protrusions having an inclined side surface; a plurality of first electrodes each of which is disposed in a respective sub-pixel among the plurality of first sub pixels and the plurality of second sub pixels, wherein each first electrode among the plurality of first electrodes is disposed so as to cover the inclined side surface of a respective protrusion among the plurality of protrusions and to cover a part of the base portion adjacent to the respective protrusion; a bank layer which is disposed on the plurality of protrusions and the plurality of first electrodes and exposes a part of each of the plurality of first electrodes disposed on the base portion, wherein the each of the plurality of protrusions protrudes with a same height from the base portion in the each sub-pixel of the plurality of first sub pixels and the plurality of second sub pixels and wherein an extending length in a direction parallel to the substrate of the inclined side surface of the protrusion disposed in each of the plurality of first sub pixels is shorter than an extending length in the direction parallel to the substrate of the inclined side surface of the protrusion disposed in each of the plurality of second sub pixels.
13. 13 . The display apparatus according to claim 12 , wherein the each sub-pixel among the plurality of first sub pixels and the plurality of second sub pixels includes: a first emission area corresponding to an area where a respective first electrode among the plurality of first electrodes is exposed from the bank layer; a first non-emission area outside a periphery of the first emission area and corresponding to an area where the bank layer is disposed on the respective first electrode on the base portion; and a second emission area which outside a periphery of the first non-emission area and corresponding to the side surface of the respective protrusion among the plurality of protrusions, and in a plan view, an area of the second emission area of each of the plurality of first sub pixels is smaller than an area of the second emission area of each of the plurality of second sub pixels.
14. 14 . The display apparatus according to claim 13 , wherein the each sub-pixel among the plurality of first sub pixels and the plurality of second sub pixels further includes a second non-emission area which corresponds to a top surface of the respective protrusion and is disposed outside a periphery of the second emission area, and wherein in the plan view, a size of an area enclosed by a boundary line of the second emission area and the second non-emission area of each of the plurality of first sub pixels is smaller than a size of an area enclosed by a boundary line of the second emission area and the second non-emission area of each of the plurality of second sub pixels.
15. 15 . The display apparatus according to claim 12 , wherein the first electrode of each of the plurality of first sub pixels is disposed to form a first angle relative to a top surface of the base portion, and wherein the first electrode of each of the plurality of second sub pixels is disposed to form a second angle, relative to the top surface of the base portion, which is smaller than the first angle.
16. 16 . The display apparatus according to claim 12 , wherein a lower width of an area defined between adjacent protrusions corresponding to the first electrode in each of the plurality of first sub pixels is larger than a lower width of an area defined between adjacent protrusions corresponding to the first electrode in each of the plurality of second sub pixels; and an upper width of the area defined between the adjacent protrusions corresponding to the first electrode in each of the plurality of first sub pixels is smaller than an upper width of the area defined between the adjacent protrusions corresponding to a first electrode in each of the plurality of second sub pixels.
17. 17 . The display apparatus according to claim 12 , wherein the bank layer includes a plurality of banks, and wherein an upper width of an area defined between adjacent banks corresponding to the first electrode in each of the plurality of first sub pixels is smaller than an upper width of the area defined between the adjacent banks corresponding to the first electrode in each of the plurality of second sub pixels; and a lower width of the area defined between the adjacent banks corresponding to the first electrode in each of the plurality of first sub pixels is larger than a lower width of the area defined between the adjacent banks corresponding to the first electrode in each of the plurality of second sub pixels.
18. 18 . The display apparatus according to claim 12 , wherein the first area is a flat area and the second area is a curved area in which a slope of the second area increases with increasing distance from the first area.
19. 19 . The display apparatus according to claim 12 , further comprising: an organic layer disposed on the plurality of first electrodes and the bank layer.
20. 20 . The display apparatus according to claim 19 , further comprising: a second electrode disposed on the organic layer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS Pursuant to 35 U.S.C. § 119(a), this application claims the benefit of an earlier filing date and right of priority to Korean Patent Application No. 10-2024-0154265 filed on Nov. 4, 2024, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. TECHNICAL FIELD The present disclosure generally relates to a display apparatus. BACKGROUND In a full-scale information era, there has been rapid development of display apparatuses that visually express electrical information signals, with continued improvements in display apparatuses such as reduced thickness, lighter weights, and lower power consumption. Among various display apparatuses, an organic light emitting display apparatus is a self-emitting display apparatus in which a separate light source is not necessary, which is different from the liquid crystal display apparatus. Organic light emitting display apparatuses can be manufactured to have a light weight and a small thickness. Further, such display apparatuses can be driven at a lower voltage, providing advantages not only in terms of power consumption, but also in terms of color implementation, a response speed, a viewing angle, and a contrast ratio (CR). SUMMARY According to an aspect of the present disclosure, a display apparatus includes a substrate including a first area in which a plurality of first sub pixels is disposed and a second area outside a periphery of the first area and including a plurality of second sub pixels disposed therein, an over coating layer which is disposed on the substrate and includes a base portion and protrusions which protrude from the base portion, where each protrusion has an inclined side surface, a plurality of first electrodes each of which is disposed in each of the first and second sub pixels, and is disposed so as to cover the inclined side surface of the protrusion and the base portion, a bank layer disposed on a top surface of the protrusions and the first electrodes and exposes a part of the first electrodes disposed on the base portion, an organic layer disposed on the plurality of first electrodes and the bank layer, and a second electrode disposed on the organic layer. An inclination angle of the inclined side surface of the protrusion of the plurality of first sub pixels is larger than an inclination angle of the inclined side surface of the protrusion of the plurality of second sub pixels. According to another aspect of the present disclosure, a display apparatus includes a substrate including a first area in which a plurality of first sub pixels is disposed and a second area outside a periphery of the first area and including a plurality of second sub pixels disposed therein, an over coating layer which is disposed on the substrate and includes a base portion and protrusions which protrude from the base portion, where each protrusion has an inclined side surface, a plurality of first electrodes each of which is disposed in each of the first and second sub pixels, and is disposed so as to cover the side surface of the protrusions and the base portion, a bank layer disposed on the protrusions and the first electrodes and exposes a part of the first electrodes disposed on the base portion, an organic layer disposed on the plurality of first electrodes and the bank layer, and a second electrode disposed on the organic layer. The protrusion protrudes with the same height from the base portion in each of the plurality of first sub pixels and the plurality of second sub pixels and an extending length in a direction parallel to the substrate of the side surface of the protrusion disposed in the plurality of first sub pixels is shorter than an extending length in the direction parallel to the substrate of the side surface of the protrusion disposed in the plurality of second sub pixels. Other detailed matters of the example implementations are included in the detailed description and the drawings. BRIEF DESCRIPTION OF DRAWINGS The above and other aspects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. 1 is a perspective view of a display apparatus according to an example implementation of the present disclosure; FIG. 2 is a cross-sectional view of a display apparatus taken along the line II-II′ of FIG. 1; FIG. 3A is an enlarged cross-sectional view of one sub pixel disposed in a first area of a display apparatus according to an example implementation of the present disclosure; FIG. 3B is a plan view for explaining an emission area and a non-emission area of one sub pixel disposed in a first area of a display apparatus according to an example implementation of the present disclosure; FIG. 4 is a cross-sectional view of a display apparatus taken along the line IV-IV′ of FIG. 1; FIG. 5A is an enlarged cross-sectional view of one