Display apparatus including a pixel-defining layer with different taper angles

1 . A display apparatus comprising:

a substrate;

a first pixel electrode over the substrate, wherein a first distance between a first portion of the first pixel electrode and the substrate is different from a second distance between a second portion of the first pixel electrode and the substrate; and

a pixel-defining layer covering a portion of the first pixel electrode and having a first opening exposing a central portion of the first pixel electrode,

wherein a first taper angle of an inner surface of the first opening at a first defined portion of the pixel-defining layer covering the first portion is different from a second taper angle of an inner surface of the first opening at a second defined portion of the pixel-defining layer covering the second portion.

2 . The display apparatus of claim 1 , wherein the first distance is greater than the second distance, and the first taper angle is less than the second taper angle.

3 . The display apparatus of claim 2 , further comprising:

a first conductive layer; and

an insulating layer between the first conductive layer and the first pixel electrode,

wherein the first pixel electrode is electrically connected to the first conductive layer through a first contact hole of the insulating layer, and the first contact hole is closer to the second portion than the first portion.

4 . The display apparatus of claim 1 , wherein the first and second portions are at opposite sides of the first pixel electrode with respect to a center of the first pixel electrode.

5 . The display apparatus of claim 1 , wherein, when viewed in a direction perpendicular to the substrate, a portion of one of the first portion and the second portion adjoining the first opening has a round shape.

6 . The display apparatus of claim 1 , wherein the first distance is greater than the second distance, and the first taper angle is less than the second taper angle, and

wherein, when viewed in a direction perpendicular to the substrate, a portion of the first portion adjoining the first opening has a round shape.

7 . The display apparatus of claim 6 , wherein, when viewed in the direction perpendicular to the substrate, a portion of the second portion adjoining the first opening has a straight line shape or an angled shape.

8 . The display apparatus of claim 1 , further comprising:

a second pixel electrode on the substrate,

wherein a third distance between a third portion of the second pixel electrode and the substrate is different from a fourth distance between a fourth portion of the second pixel electrode and the substrate,

wherein the pixel-defining layer covers a portion of the second pixel electrode and has a second opening exposing a central portion of the second pixel electrode, and

wherein a third taper angle of an inner surface of the second opening at a third defined portion of the pixel-defining layer covering the third portion is different from a fourth taper angle of an inner surface of the second opening at a fourth defined portion of the pixel-defining layer covering the fourth portion.

9 . The display apparatus of claim 8 , wherein the first and second portions are at opposite sides of the first pixel electrode with respect to a center of the first pixel electrode, and the third and fourth portions are at opposite sides of the second pixel electrode with respect to a center of the second pixel electrode.

10 . The display apparatus of claim 8 , wherein, when viewed in a direction perpendicular to the substrate, a portion of one of the first portion and the second portion adjoining the first opening has a round shape, and a portion of one of the third portion and the fourth portion adjoining the second opening has a round shape.

11 . The display apparatus of claim 8 , wherein the first distance is greater than the second distance, the first taper angle is less than the second taper angle, the fourth distance is greater than the third distance, and the fourth taper angle is less than the third taper angle, and

wherein, when viewed in a direction perpendicular to the substrate, a portion of the first portion adjoining the first opening has a round shape, and a portion of the fourth portion adjoining the second opening has a round shape.

12 . The display apparatus of claim 11 , wherein, when viewed in the direction perpendicular to the substrate, a portion of the second portion adjoining the first opening has a straight line shape or an angled shape, and a portion of the third portion adjoining the second opening has a straight line shape or an angled shape.

13 . The display apparatus of claim 8 , wherein the first distance is greater than the second distance, the first taper angle is less than the second taper angle, the fourth distance is greater than the third distance, and the fourth taper angle is less than the third taper angle.

14 . The display apparatus of claim 13 , further comprising:

a first conductive layer and a second conductive layer positioned on a same layer; and

an insulating layer covering the first conductive layer and the second conductive layer,

wherein the first pixel electrode and the second pixel electrode are on the insulating layer, the first pixel electrode is electrically connected to the first conductive layer through a first contact hole of the insulating layer, the second pixel electrode is electrically connected to the second conductive layer through a second contact hole of the insulating layer, and

wherein the first contact hole is closer to the second portion than the first portion, and the second contact hole is closer to the third portion than the fourth portion.

15 . The display apparatus of claim 14 , wherein the first contact hole is closer to the third portion than the fourth portion, and the second contact hole is closer to the second portion than the first portion.

16 . The display apparatus of claim 14 , wherein the second portion is a portion of the first pixel electrode in a direction toward the second pixel electrode, and the third portion is a portion of the second pixel electrode in a direction toward the first pixel electrode.

17 . The display apparatus of claim 13 , further comprising:

a third pixel electrode over the substrate, a fifth distance between a fifth portion of the third pixel electrode and the substrate is less than a sixth distance between a sixth portion of the third pixel electrode and the substrate;

a first conductive layer, a second conductive layer, and a third conductive layer, on a same layer and sequentially arranged in a first direction; and

an insulating layer covering the first conductive layer, the second conductive layer, and the third conductive layer,

wherein the first pixel electrode, the second pixel electrode, and the third pixel electrode are on the insulating layer,

wherein the first pixel electrode is electrically connected to the first conductive layer through a first contact hole of the insulating layer, the second pixel electrode is electrically connected to the second conductive layer through a second contact hole of the insulating layer, and the third pixel electrode is electrically connected to the third conductive layer through a third contact hole of the insulating layer, and

wherein the first contact hole is closer to the second portion than the first portion, the second contact hole is closer to the third portion than the fourth portion, and the third contact hole is closer to the fifth portion among the fifth portion and the sixth portion.

18 . The display apparatus of claim 17 , wherein a first virtual line connecting a center of the first pixel electrode to a center of the third pixel electrode extends in the first direction, and a center of the second pixel electrode is located in a second direction perpendicular to the first direction with respect to the first virtual line, and

wherein the first contact hole, the second contact hole, and the third contact hole are located between the first virtual line and a second virtual line passing through the center of the second pixel electrode and parallel to the first virtual line.

19 . A display apparatus comprising:

first pixel electrodes and third pixel electrodes alternately arranged in a first row extending in a first direction;

second pixel electrodes arranged in a second row extending in the first direction;

first conductive layers, second conductive layers, and third conductive layers arranged between the first row and the second row, the first conductive layers corresponding to the first pixel electrodes, the second conductive layers corresponding to the second pixel electrodes, and the third conductive layers corresponding to the third pixel electrodes;

an insulating layer covering the first conductive layers, the second conductive layers, and the third conductive layers; and

a pixel-defining layer covering the first pixel electrodes, the second pixel electrodes, and the third pixel electrodes, and comprising first openings exposing central portions of the first pixel electrodes, second openings exposing central portions of the second pixel electrodes, and third openings exposing central portions of the third pixel electrodes,

wherein the first pixel electrodes, the second pixel electrodes, and the third pixel electrodes are on the insulating layer,

wherein the first pixel electrodes are electrically connected to the first conductive layers through first contact holes of the insulating layer, the second pixel electrodes are electrically connected to the second conductive layers through second contact holes of the insulating layer, and the third pixel electrodes are electrically connected to the third conductive layers through third contact holes of the insulating layer, and

wherein, in a second direction perpendicular to the first direction, a second taper angle at a portion of an inner surface of each of the first openings in a direction toward the second row is different from a first taper angle at a portion in a direction away from of the second row, a fifth taper angle at a portion of an inner surface of each of the third openings in a direction toward the second row is different from a sixth taper angle at a portion in a direction away from the second row, and a third taper angle at a portion of an inner surface of each of the second openings in a direction toward the first row is different from a fourth taper angle at a portion in a direction away from the first row.

20 . The display apparatus of claim 19 , wherein the first taper angle is less than the second taper angle, the sixth taper angle is less than the fifth taper angle, and the fourth taper angle is less than the third taper angle.