CN-122003051-A - Display device

Abstract

According to an aspect of the present disclosure, a display device includes a substrate including a first region in which a plurality of first sub-pixels are disposed and a second region surrounding the first region and including a plurality of second sub-pixels disposed therein, an overcoat layer disposed on the substrate and including a base portion and a protrusion protruding from the base portion and having an inclined side surface, a plurality of first electrodes each disposed in each of the plurality of first sub-pixels and the plurality of second sub-pixels and disposed to cover the side surface of the protrusion and the base portion, a bank disposed on top surfaces of the protrusion and the first electrodes and exposing a portion of the first electrodes disposed on the base portion, an organic layer disposed on the plurality of first electrodes and the bank, and a second electrode disposed on the organic layer. The inclination angle of the side surfaces of the protruding portions of the plurality of first sub-pixels is larger than the inclination angle of the side surfaces of the protruding portions of the plurality of second sub-pixels.

Inventors

• ZHENG SHUJI
• LI CHENGZHU
• Jin Rongmen
• Bai Zhengshan
• Shen Yaoxie

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260508

Application Date

20250911

Priority Date

20241104

Claims (20)

1. 1. A display device, comprising: A substrate including a first region in which a plurality of first sub-pixels are disposed and a second region surrounding the first region, and including a plurality of second sub-pixels disposed therein; An overcoat layer disposed on the substrate and including a base portion and a protrusion protruding from the base portion and having an inclined side surface; a plurality of first electrodes, each of the plurality of first electrodes being disposed in each of the plurality of first sub-pixels and the plurality of second sub-pixels and being disposed to cover the side surfaces and the base portion of the protrusion, and A bank disposed on the protrusion and a top surface of the first electrode and exposing a portion of the first electrode disposed on the base portion, Wherein an inclination angle of the side surfaces of the protruding portions of the plurality of first sub-pixels is larger than an inclination angle of the side surfaces of the protruding portions of the plurality of second sub-pixels.
2. 2. The display device of claim 1, wherein each of the plurality of first sub-pixels and the plurality of second sub-pixels comprises: a first emission region corresponding to a region where the first electrode is exposed from the bank; a first non-emission region surrounding the first emission region and corresponding to a region of the first electrode on the base portion, and A second emission region surrounding the first non-emission region and corresponding to the side surface of the protrusion, and In a plan view, an area of the second emission regions of the plurality of first sub-pixels is smaller than an area of the second emission regions of the plurality of second sub-pixels.
3. 3. The display device of claim 2, wherein an area of the first emission region of the plurality of first sub-pixels is greater than an area of the first emission region of the plurality of second sub-pixels.
4. 4. The display device of claim 2, wherein each of the plurality of first sub-pixels and the plurality of second sub-pixels further comprises a second non-emission region corresponding to a top surface of the protrusion and disposed to surround the second emission region.
5. 5. The display device according to claim 4, wherein a size of a region surrounded by a boundary line of the second emission region and the second non-emission region of the first sub-pixel is smaller than a size of a region surrounded by a boundary line of the second emission region and the second non-emission region of the second sub-pixel in the plan view.
6. 6. The display device according to claim 1, wherein an extension length of the side surface of the protruding portion provided in the plurality of first sub-pixels in a direction parallel to the substrate is shorter than an extension length of the side surface of the protruding portion provided in the plurality of second sub-pixels in the direction parallel to the substrate.
7. 7. The display device according to claim 1, wherein a lower width of the region defined by the protrusion corresponding to the first electrode in each of the plurality of first sub-pixels is larger than a lower width of the region defined by the protrusion corresponding to the first electrode in each of the plurality of second sub-pixels, and An upper width of a region defined by the protrusion corresponding to the first electrode in each of the plurality of first sub-pixels is smaller than an upper width of a region defined by the protrusion corresponding to the first electrode in each of the plurality of second sub-pixels.
8. 8. The display device according to claim 1, wherein an upper width of a region defined by the bank corresponding to the first electrode in each of the plurality of first sub-pixels is smaller than an upper width of a region defined by the bank corresponding to the first electrode in each of the plurality of second sub-pixels, and A lower width of the region defined by the bank corresponding to the first electrode in each of the plurality of first sub-pixels is greater than a lower width of the region defined by the bank corresponding to the first electrode in each of the plurality of second sub-pixels.
9. 9. The display device of claim 1, wherein the first region is a flat region and the second region is a curved region, wherein the farther from the first region, the greater the slope of the second region.
10. 10. The display device according to claim 1, further comprising: An organic layer disposed on the plurality of first electrodes and the bank.
11. 11. The display device according to claim 10, further comprising: And a second electrode disposed on the organic layer.
12. 12. A display device, comprising: A substrate including a first region in which a plurality of first sub-pixels are disposed and a second region surrounding the first region, and including a plurality of second sub-pixels disposed therein; An overcoat layer disposed on the substrate and including a base portion and a protrusion protruding from the base portion and having an inclined side surface; A plurality of first electrodes, each of the plurality of first electrodes being disposed in each of the plurality of first sub-pixels and the plurality of second sub-pixels and being disposed to cover the side surfaces of the protruding portion and the base portion; A bank portion provided on the protruding portion and the first electrode and exposing a portion of the first electrode provided on the base portion, Wherein in each of the plurality of first sub-pixels and the plurality of second sub-pixels, the protruding portion protrudes from the base portion by the same height, and An extension length of the side surface of the protruding portion provided in the plurality of first sub-pixels in a direction parallel to the substrate is shorter than an extension length of the side surface of the protruding portion provided in the plurality of second sub-pixels in the direction parallel to the substrate.
13. 13. The display device of claim 12, wherein each of the plurality of first sub-pixels and the plurality of second sub-pixels comprises: a first emission region corresponding to a region where the first electrode is exposed from the bank; a first non-emission region surrounding the first emission region and corresponding to a region of the first electrode on the base portion, and A second emission region surrounding the first non-emission region and corresponding to the side surface of the protrusion, and In a plan view, an area of the second emission regions of the plurality of first sub-pixels is smaller than an area of the second emission regions of the plurality of second sub-pixels.
14. 14. The display device of claim 13, wherein each of the plurality of first and second sub-pixels further comprises a second non-emissive region corresponding to a top surface of the protrusion and disposed to surround the second emissive region, and In the plan view, a size of a region surrounded by a boundary line of the second emission region and the second non-emission region of the first sub-pixel is smaller than a size of a region surrounded by a boundary line of the second emission region and the second non-emission region of the second sub-pixel.
15. 15. The display device according to claim 12, wherein the first electrodes of the plurality of first sub-pixels are disposed to form a first angle with a top surface of the base portion, and The first electrodes of the plurality of second sub-pixels are disposed to form a second angle smaller than the first angle with the top surface of the base portion.
16. 16. The display device according to claim 12, wherein a lower width of the region defined by the protrusion corresponding to the first electrode in each of the plurality of first sub-pixels is greater than a lower width of the region defined by the protrusion corresponding to the first electrode in each of the plurality of second sub-pixels, and An upper width of a region defined by the protrusion corresponding to the first electrode in each of the plurality of first sub-pixels is smaller than an upper width of a region defined by the protrusion corresponding to the first electrode in each of the plurality of second sub-pixels.
17. 17. The display device according to claim 12, wherein an upper width of the region defined by the bank corresponding to the first electrode in each of the plurality of first sub-pixels is smaller than an upper width of the region defined by the bank corresponding to the first electrode in each of the plurality of second sub-pixels, and A lower width of the region defined by the bank corresponding to the first electrode in each of the plurality of first sub-pixels is greater than a lower width of the region defined by the bank corresponding to the first electrode in each of the plurality of second sub-pixels.
18. 18. The display device of claim 12, wherein the first region is a flat region and the second region is a curved region, wherein the farther from the first region, the greater the slope of the second region.
19. 19. The display device according to claim 12, further comprising: An organic layer disposed on the plurality of first electrodes and the bank.
20. 20. The display device according to claim 19, further comprising: And a second electrode disposed on the organic layer.

Description

Display device Cross Reference to Related Applications The present application claims priority from korean patent application No.10-2024-0154265, filed at korean intellectual property office, at 11/4/2024, the disclosure of which is incorporated herein by reference. Technical Field The present disclosure relates to a display device, and more particularly, to a display device that minimizes a luminance difference between a curved portion or a bent portion and a flat portion to improve display quality. Background Currently, with the entry into the full-size information age, the field of display devices visually expressing electric information signals has rapidly progressed, and research is continued to improve the performance of various display devices, such as thin thickness, light weight, and low power consumption. Among various display devices, the organic light emitting display device is a self light emitting display device, so that a separate light source is not required, unlike a liquid crystal display device. Accordingly, the organic light emitting display device may be manufactured to have a light weight and a small thickness. Further, since the display device is driven at a low voltage, it is advantageous not only in terms of power consumption but also in terms of color implementation, response speed, viewing angle, and Contrast Ratio (CR). Therefore, it is expected to be used in various fields. Disclosure of Invention An object to be achieved by the present disclosure is to provide a display device in which an edge is a curved portion or a bent portion, and a luminance difference between the curved portion or the bent portion and a flat portion is minimized to improve display quality. Another object to be achieved by the present disclosure is to provide a display device in which production energy is reduced and process optimization is achieved by performing a process for minimizing a luminance difference between a bent portion and a flat portion or a luminance difference between a bent portion and a flat portion using the same mask. The objects of the present disclosure are not limited to the above objects, and other objects not mentioned above will be clearly understood by those skilled in the art from the following description. According to an aspect of the present disclosure, a display device includes a substrate including a first region in which a plurality of first sub-pixels are disposed and a second region surrounding the first region and including a plurality of second sub-pixels disposed therein, an overcoat layer disposed on the substrate and including a base portion and a protrusion protruding from the base portion and having an inclined side surface, a plurality of first electrodes each of which is disposed in each of the plurality of first sub-pixels and the plurality of second sub-pixels and is disposed to cover the side surfaces of the base portion and the protrusion, a bank disposed on a top surface of the protrusion and the first electrode and exposing a portion of the first electrode disposed on the base portion, an organic layer disposed on the plurality of first electrodes and the bank, and a second electrode disposed on the organic layer. The inclination angle of the side surfaces of the protruding portions of the plurality of first sub-pixels is larger than the inclination angle of the side surfaces of the protruding portions of the plurality of second sub-pixels. According to another aspect of the present disclosure, a display device includes a substrate including a first region in which a plurality of first sub-pixels are disposed and a second region surrounding the first region and including a plurality of second sub-pixels disposed therein, an overcoat layer disposed on the substrate and including a base portion and a protrusion protruding from the base portion and having an inclined side surface, a plurality of first electrodes each of which is disposed in each of the plurality of first sub-pixels and the plurality of second sub-pixels and is disposed to cover the side surfaces of the base portion and the protrusion, a bank disposed on the protrusion and the first electrodes and exposing a portion of the first electrodes disposed on the base portion, an organic layer disposed on the plurality of first electrodes and the bank, and a second electrode disposed on the organic layer. In each of the plurality of first sub-pixels and the plurality of second sub-pixels, the protruding portion protrudes from the base portion by the same height, and an extension length of a side surface of the protruding portion provided in the plurality of first sub-pixels in a direction parallel to the substrate is shorter than an extension length of a side surface of the protruding portion provided in the plurality of second sub-pixels in a direction parallel to the substrate. Other details of the exemplary embodiments are included in the specific embodiments and the accompanying drawings. Accord