US-12628525-B2 - Display device including insulating layer defining opening

Abstract

A display device includes a substrate, a pixel electrode disposed on the substrate, a bank layer which is disposed on the pixel electrode and in which a pixel opening overlapping the pixel electrode is defined, an encapsulation layer disposed on the pixel electrode and the bank layer, a sensing electrode disposed on the encapsulation layer, a first insulating layer which is disposed on the sensing electrode and in which an opening overlapping the pixel opening is defined, and a second insulating layer disposed on the first insulating layer and having a higher refractive index than a refractive index of the first insulating layer. The opening of the first insulating layer includes a first edge and a second edge separated from an edge of the pixel opening and extending in different directions from each other and a first extension part disposed at a portion where the first edge and the second edge meet.

Inventors

• Jung-hyun Cho
• Kang Wook HEO
• Chi Wook An
• Won Hak CHOI

Assignees

• SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date

20260512

Application Date

20241024

Priority Date

20220524

Claims (20)

1. 1 . An electronic device comprising: a display device comprising: a substrate; a pixel electrode disposed on the substrate; a bank layer in which a pixel opening is defined, the bank layer being disposed on the pixel electrode; a first insulating layer which is disposed over the bank layer and in which an opening overlapping the pixel opening is defined; and a second insulating layer disposed on the first insulating layer and having a higher refractive index than a refractive index of the first insulating layer, wherein the opening of the first insulating layer includes a first edge and a second edge separated from an edge of the pixel opening and extending in different directions from each other in a plan view, and a first extension part protrudes from a portion where the first edge and the second edge meet in the plan view.
2. 2 . The electronic device of claim 1 , wherein the first extension part has a first width and a first length, and the first length is larger than the first width.
3. 3 . The electronic device of claim 2 , wherein the first width decreases as the first width is farther from the edge of the pixel opening, the first width is smaller than about 4 micrometers, and the thickness of the second insulating layer is about 9 micrometers to about 11 micrometers.
4. 4 . The electronic device of claim 1 , wherein the opening of the first insulating layer further includes a second extension part disposed at a center of the first edge and the second edge.
5. 5 . The electronic device of claim 4 , wherein the first extension part has a first width and a first length, and the second extension part has a second width and a second length, and the second length is larger than the second width.
6. 6 . The electronic device of claim 5 , wherein the second width decreases as the second width is farther from the edge of the pixel opening, and the second width is smaller than about 4 micrometers.
7. 7 . The electronic device of claim 5 , wherein the second length is equal to or shorter than the first length.
8. 8 . The electronic device of claim 4 , wherein the first extension part includes a first sub-extension part and a second sub-extension part extending in a direction parallel to a first direction, and a third sub-extension part and a fourth sub-extension part extending in a direction parallel to a second direction different from the first direction, an imaginary first line overlapping the first sub-extension part and parallel to the first direction and an imaginary second line overlapping the second sub-extension part and parallel to the first direction do not overlap each other, an imaginary third line overlapping the third sub-extension part and parallel to the second direction and an imaginary fourth line overlapping the fourth sub-extension part and parallel to the second direction do not overlap each other, the second extension part includes a fifth sub-extension part and a sixth sub-extension part extending in a direction parallel to a third direction oblique to the first direction and the second direction, and a seventh sub-extension part and an eighth sub-extension part extending in a fourth direction oblique to the first direction and the second direction and different from the third direction, the fifth sub-extension part and the sixth sub-extension part overlap an imaginary fifth line parallel to the third direction, and the seventh sub-extension part and the eighth sub-extension part overlap an imaginary sixth line parallel to the fourth direction.
9. 9 . The electronic device of claim 1 , wherein the pixel opening includes a plurality of pixel opening edges extending in different directions, and the pixel opening has a polygonal planar shape with a chamfered corner between adjacent pixel opening edges of the plurality of pixel opening edges extending in the different directions.
10. 10 . The electronic device of claim 9 , wherein in a plan view, the opening of the first insulating layer is larger than the pixel opening, and the first edge and the second edge of the opening of the first insulating layer are substantially parallel to the plurality of pixel opening edges.
11. 11 . The electronic device of claim 1 , wherein an end of the first extension part has a convex curved line shape, and a width of the first extension part decreases as the width of the first extension part is farther from the edge of the pixel opening.
12. 12 . The electronic device of claim 1 , wherein an end of the first extension part has a planar shape which is pointed toward the end, and a width of the first extension part decreases as the width of the first extension part is farther from the edge of the pixel opening.
13. 13 . The electronic device of claim 1 , wherein an end of the first extension part has a planar shape of a straight line, and a width of the first extension part decreases as the width of the first extension part is farther from the edge of the pixel opening.
14. 14 . The electronic device of claim 1 , wherein the first extension part includes a first sub-extension part and a second sub-extension part extending in a direction parallel to a first direction, and a third sub-extension part and a fourth sub-extension part extending in a direction parallel to a second direction different from the first direction, an imaginary first line overlapping the first sub-extension part and parallel to the first direction and an imaginary second line overlapping the second sub-extension part and parallel to the first direction do not overlap each other, and an imaginary third line overlapping the third sub-extension part and parallel to the second direction and an imaginary fourth line overlapping the fourth sub-extension part and parallel to the second direction do not overlap each other.
15. 15 . An electronic device comprising: a display device comprising: a substrate; a plurality of pixel electrodes disposed on the substrate; a bank layer which is disposed on the plurality of pixel electrodes and in which a plurality of pixel openings overlapping the plurality of pixel electrodes is defined; a first insulating layer which is disposed over the bank layer and in which a plurality of first openings overlapping pixel openings among the plurality of pixel openings is defined; and a second insulating layer disposed on the first insulating layer and having a higher refractive index than a refractive index of the first insulating layer, wherein each of the plurality of first openings of the first insulating layer is separated from the edge of the pixel openings and includes a first edge and a second edge extending in different directions in a plan view, and a first extension part protrudes from a portion where the first edge and the second edge meet in the plan view.
16. 16 . The electronic device of claim 15 , wherein the plurality of pixel openings includes a first pixel opening in which an emission layer emitting a first color is disposed, a second pixel opening and a third pixel opening in which an emission layer emitting a second color is disposed, and a fourth pixel opening in which an emission layer emitting a third color is disposed, and the plurality of first openings overlaps the first pixel opening and the fourth pixel opening.
17. 17 . The electronic device of claim 16 , wherein each of the plurality of first openings further includes a second extension part disposed at the center of the first edge and the second edge.
18. 18 . The electronic device of claim 15 , wherein the plurality of pixel openings includes a plurality of dots including a first pixel opening in which an emission layer emitting a first color is disposed, a second pixel opening and a third pixel opening in which an emission layer emitting a second color is disposed, and a fourth pixel opening in which an emission layer emitting a third color is disposed, and the plurality of first openings overlaps some dots among the plurality of dots.
19. 19 . The electronic device of claim 16 , wherein each of the plurality of first openings further includes a second extension part disposed at the center of the first edge and the second edge.
20. 20 . The electronic device of claim 17 , wherein the first extension part includes a first sub-extension part and a second sub-extension part extending in a direction parallel to a first direction, and a third sub-extension part and a fourth sub-extension part extending in a direction parallel to a second direction different from the first direction, an imaginary first line overlapping the first sub-extension part and parallel to the first direction and an imaginary second line overlapping the second sub-extension part and parallel to the first direction do not overlap each other, and an imaginary third line overlapping the third sub-extension part and parallel to the second direction and an imaginary fourth line overlapping the fourth sub-extension part and parallel to the second direction do not overlap each other.

Description

This application is a continuation of U.S. patent application Ser. No. 18/122,302, filed on Mar. 16, 2023, which claims priority to Korean Patent Application No. 10-2022-0063586, filed on May 24, 2022, and all the benefits accruing therefrom under 35 U.S.C. § 119, the content of which in its entirety is herein incorporated by reference. BACKGROUND 1. Field The disclosure relates to a display device. 2. Description of the Related Art Display devices include a liquid crystal display (“LCD”), a plasma display panel (“PDP”), an organic light-emitting diode (“OLED”) display device, a field emission display (“FED”), an electrophoretic display, etc. The display device consists of a multi-layered structure. The display device may have a multi-layered structure in which a light-emitting element, a touch sensor, etc., are stacked on a substrate, for example. The light generated from the light-emitting element passes through these layers and is emitted to the outside of the display device, so that a screen may be displayed. SUMMARY Some of light generated by a light-emitting element may be lost without being emitted to the outside, such as being reflected from an inter-interface. As a result, there is a problem that front light output efficiency and display quality of the display device deteriorate. Embodiments are to provide a display device capable of improving light output efficiency and display quality. However, the feature to be achieved by the embodiments is not limited to the above-mentioned features, but may be variously expanded without departing from the technical spirit of this disclosure. A display device in an embodiment includes a substrate, a pixel electrode disposed on the substrate, a bank layer which is disposed on the pixel electrode and in which a pixel opening overlapping the pixel electrode, an encapsulation layer disposed on the pixel electrode and the bank layer is defined, a sensing electrode disposed on the encapsulation layer, a first insulating layer which is disposed on the sensing electrode and in which an opening overlapping the pixel opening is defined, and a second insulating layer disposed on the first insulating layer and having a higher refractive index than a refractive index of the first insulating layer. The opening of the first insulating layer includes a first edge and a second edge separated from an edge of the pixel opening and extending in different directions from each other and a first extension part disposed at a portion where the first edge and the second edge meet. In an embodiment, the first extension part may have a first width and a first length, and the first length may be larger than the first width. In an embodiment, the first width may be smaller than about 4 micrometers (μm). In an embodiment, the thickness of the second insulating layer may be about 9 μm to about 11 μm. In an embodiment, the first extension part may include a first sub-extension part and a second sub-extension part extending in a direction parallel to a first direction, and a third sub-extension part and a fourth sub-extension part extending in a direction parallel to a second direction different from the first direction, an imaginary first line overlapping the first sub-extension part and parallel to the first direction and an imaginary second line overlapping the second sub-extension part and parallel to the first direction that may not overlap each other, an imaginary third line overlapping the third sub-extension part and parallel to the second direction and an imaginary fourth line overlapping the fourth sub-extension part and parallel to the second direction that may not overlap each other. In an embodiment, the second extension part may include a fifth sub-extension part and a sixth sub-extension part extending in a direction parallel to a third direction oblique to the first direction and the second direction, and a seventh sub-extension part and an eighth sub-extension part extending in a fourth direction oblique to the first direction and the second direction and different from the third direction, the fifth sub-extension part and the sixth sub-extension part may overlap an imaginary fifth line parallel to the third direction, and the seventh sub-extension part and the eighth sub-extension part may overlap an imaginary sixth line parallel to the fourth direction. In an embodiment, the opening of the first insulating layer may further include a second extension part disposed at the center of the first edge and the second edge. In an embodiment, the second extension part may have a second width and a second length, and the second length may be larger than the second width. In an embodiment, the second width may decrease as the second width is farther from the edge of the pixel opening, and the second width may be smaller than about 4 μm. In an embodiment, the second length may be equal to or shorter than the first length. In an embodiment, the pixel opening may include a plurality of pi