Display panel with a separation pillar having slanting side surfaces disposed on a pixel definition layer

1. A display panel, comprising:

a substrate;

a first pixel electrode overlaying the substrate;

a pixel definition layer overlaying a side of the first pixel electrode away from the substrate and comprising a plurality of pixel openings to expose a portion of a surface of the first pixel electrode;

a plurality of first type of separation pillars disposed on a side of the pixel definition layer away from the first pixel electrode, wherein a width of one of the first type of separation pillars changes continuously or intermittently in an extending direction of one of the first type of separation pillars, and the extending direction of one of the first type of separation pillars is parallel to the substrate, the width being a dimension of a projection of one of the first type of separation pillars on the substrate in a direction perpendicular to the extending direction of one of the first type of separation pillars; and

a separation cathode positioned above separation pillars and being disconnected from the first pixel electrode.

2. The display panel according to claim 1 , wherein the plurality of the first type of separation pillars is arranged in parallel on the substrate.

3. The display panel according to claim 1 , wherein the display panel is a passive-matrix organic light-emitting diode (PMOLED) display panel.

4. The display panel according to claim 1 , wherein the first pixel electrode comprises at least one selected from the group consisting of indium tin oxide, indium zinc oxide, silver-doped indium tin oxide, and silver-doped indium zinc oxide.

5. The display panel according to claim 1 , further comprising a plurality of second type of separation pillars, wherein one of the second type of separation pillars comprises a strip shape, and the first type of separation pillars and the second type of separation pillars are disposed alternately.

6. The display panel according to claim 1 , wherein:

the plurality of first type of separation pillars comprises a bottom surface in contact with the pixel definition layer and a top surface positioned opposite to the bottom surface;

in the direction perpendicular to the extending direction of one of the first type of separation pillars, a width of the top surface is greater than or equal to a width of the bottom surface; and

the top surface has a changing width along the extending direction of one of the first type of separation pillars.

7. The display panel according to claim 6 , wherein at least one of two side edges of the top surface of one of the first type of separation pillars extending along the extending direction of one of the first type of separation pillars comprises a shape of at least one of a polyline segment, an arc, a semicircle, and a wave.

8. The display panel according to claim 7 , wherein the bottom surface is parallel to the top surface, and a shape of the bottom surface is substantially the same as a shape of the top surface.

9. The display panel according to claim 7 , wherein the plurality of first type of separation pillars further comprises two side surfaces connected to the top surface and the bottom surface, and a projection of each of the side surfaces on the substrate coincides with a projection of the side edge on the substrate.

10. The display panel according to claim 7 , wherein the shape of the side edge is formed by connecting a plurality of semicircular edges having the same opening direction, and one of the edges comprises an opening facing a sub-pixel area.

11. The display panel according to claim 1 , wherein a projection of one of the pixel openings on the substrate is a pattern unit or at least two pattern units connected to one another, and the pattern unit comprises a circular shape, elliptical shape, or dumbbell shape.

12. The display panel according to claim 1 , further comprising a light emitting structure layer disposed on a side of the first pixel electrode away from the substrate and a second pixel electrode disposed on a side of the light emitting structure layer away from the first pixel electrode, an extending direction of the first pixel electrode being perpendicular to an extending direction of the second pixel electrode.

13. The display panel according to claim 12 , wherein the second pixel electrode is made of at least one selected from the group consisting of indium tin oxide, indium zinc oxide, silver-doped indium tin oxide, and silver-doped indium zinc oxide.

14. A display screen, comprising:

a first display area configured to display a picture; and

the display panel according to claim 1 disposed in the first display area.

15. A display panel, comprising:

a substrate;

a first pixel electrode overlaying the substrate;

a pixel definition layer overlaying a side of the first pixel electrode away from the substrate and comprising a plurality of pixel openings to expose a portion of a surface of the first pixel electrode; and

a plurality of first type of separation pillars disposed on a side of the pixel definition layer away from the first pixel electrode, wherein a width of one of the first type of separation pillars changes continuously or intermittently in an extending direction of one of the first type of separation pillars, and the extending direction of one of the first type of separation pillars is parallel to the substrate, the width being a dimension of a projection of one of the first type of separation pillars on the substrate in a direction perpendicular to the extending direction of one of the first type of separation pillars;

wherein:

the plurality of first type of separation pillars comprises a bottom surface in contact with the pixel definition layer and a top surface positioned opposite to the bottom surface;

in the direction perpendicular to the extending direction of one of the first type of separation pillars, a width of the top surface is greater than or equal to a width of the bottom surface; and

the top surface has a changing width along the extending direction of one of the first type of separation pillars, at least one of two side edges of the top surface of one of the first type of separation pillars extending along the extending direction of one of the first type of separation pillars comprises a shape of at least one of a polyline segment, an arc, a semicircle, and a wave, the shape of the side edge is formed by connecting a plurality of semicircular edges having the same opening direction, and one of the edges comprises an opening facing a sub-pixel area.

16. A display panel, comprising:

a substrate;

a first pixel electrode overlaying the substrate;

a pixel definition layer overlaying a side of the first pixel electrode away from the substrate and comprising a plurality of pixel openings to expose a portion of a surface of the first pixel electrode; and

a plurality of first type of separation pillars disposed on a side of the pixel definition layer away from the first pixel electrode, wherein a width of one of the first type of separation pillars changes continuously or intermittently in an extending direction of one of the first type of separation pillars, and the extending direction of one of the first type of separation pillars is parallel to the substrate, the width being a dimension of a projection of one of the first type of separation pillars on the substrate in a direction perpendicular to the extending direction of one of the first type of separation pillars;

wherein the plurality of the first type of separation pillars is characterized by a contour with a continuously changing width that reduces diffraction.