Display substrate and method for manufacturing the same, display panel, and display apparatus
A display substrate includes a base substrate, a plurality of first electrodes, a first pixel defining layer, and a second pixel defining layer disposed on the base substrate, and light-emitting layers disposed in a plurality of second opening regions. The first pixel defining layer includes a plurality of first opening regions, and each of the first opening regions exposes at least a portion of a first electrode. The second pixel defining layer includes the plurality of second opening regions, each second opening regions corresponds to at least two first opening regions, and the orthogonal projections of the at least two first opening regions on the base substrate are located within the orthogonal projection of the second opening region on the base substrate. The light-emitting layers overspreads the plurality of second opening regions in a plane perpendicular to a thickness direction of the base substrate, respectively.
1. A display substrate, comprising:
a base substrate;
a plurality of first electrodes disposed on the base substrate;
a first pixel defining layer disposed on the base substrate, the first pixel defining layer including a plurality of first opening regions, and each first opening region exposing at least a portion of a first electrode of the plurality of first electrodes;
a second pixel defining layer disposed on the base substrate, the second pixel defining layer including a plurality of second opening regions, each second opening region corresponding to at least two first opening regions of the plurality of first opening regions, and orthogonal projections of the at least two first opening regions on the base substrate being located within an orthogonal projection of the second opening region on the base substrate;
light-emitting layers disposed in the plurality of second opening regions, the light-emitting layers overspreading the plurality of second opening regions in a plane perpendicular to a thickness direction of the base substrate, respectively; and
a plurality of auxiliary patterns disposed between the base substrate and the plurality of first electrodes, the first electrode being disposed on a surface of an auxiliary pattern away from the base substrate.
2. The display substrate according to claim 1 , wherein a surface of the first electrode away from the base substrate is closer to the base substrate than a surface of the first pixel defining layer away from the base substrate.
3. The display substrate according to claim 1 , wherein a surface of the first electrode away from the base substrate is as close to the base substrate as a surface of the first pixel defining layer away from the base substrate.
4. The display substrate according to claim 1 , wherein a surface of the first electrode away from the base substrate is farther away from the base substrate than a surface of the first pixel defining layer away from the base substrate.
5. The display substrate according to claim 1 , wherein an orthogonal projection of a surface of the auxiliary pattern away from the base substrate on the base substrate is located within an orthogonal projection of a surface of the auxiliary pattern proximate to the base substrate on the base substrate.
6. The display substrate according to claim 5 , wherein the first electrode covers a surface of the auxiliary pattern away from the base substrate and side faces of the auxiliary pattern.
7. The display substrate according to claim 6 , wherein an orthogonal projection of a surface of the first electrode away from the base substrate on the base substrate is located within an orthogonal projection of a surface of the first electrode proximate to the base substrate on the base substrate.
8. The display substrate according to claim 6 , wherein the first pixel defining layer covers side faces of the first electrode.
9. The display substrate according to claim 1 , wherein the first pixel defining layer is directly disposed on the base substrate, and the second pixel defining layer is disposed on a surface of the first pixel defining layer away from the base substrate; or
the first pixel defining layer and the second pixel defining layer are both directly disposed on the base substrate.
10. The display substrate according to claim 1 , wherein an orthographic projection of a surface of the first pixel defining layer proximate to the base substrate on the base substrate is located within an orthographic projection of a surface of the first pixel defining layer away from the base substrate on the base substrate; and
an orthographic projection of a surface of the second pixel defining layer away from the base substrate on the base substrate is located within an orthographic projection of a surface of the second pixel defining layer proximate to the base substrate on the base substrate.
11. The display substrate according to claim 1 , wherein a material of the first pixel defining layer is the same as a material of the second pixel defining layer.
12. The display substrate according to claim 1 , wherein a height of the second pixel defining layer is greater than a height of the first pixel defining layer, and the height of the first pixel defining layer and the height of the second pixel defining layer each refer to a dimension in the thickness direction of the base substrate.
13. The display substrate according to claim 1 , wherein the second opening region corresponds to a row of first opening regions, and the row of first opening regions correspond to a same color; or
the second opening region corresponds to a column of first opening regions, and the column of first opening regions correspond to a same color.
14. The display substrate according to claim 1 , wherein the second opening region corresponds to part of first opening regions in a row of first opening regions, and the part of first opening regions correspond to a same color; or
the second opening region corresponds to part of first opening regions in a column of first opening regions, and the part of first opening regions correspond to a same color.
15. The display substrate according to claim 1 , wherein the display substrate further comprises a second electrode disposed on the light-emitting layer; and
one of the first electrode and the second electrode is an anode, and another is a cathode.
16. A display panel, comprising the display substrate according to claim 1 and an encapsulation layer encapsulating the display substrate.
17. A display apparatus, comprising the display panel according to claim 16 .
18. A method for manufacturing a display substrate, the method comprising:
forming a plurality of first electrodes on a base substrate;
forming a first pixel defining layer on the base substrate, the first pixel defining layer including a plurality of first opening regions, and each first opening region exposing at least a portion of a first electrode in the plurality of first electrodes;
forming a second pixel defining layer on the base substrate, the second pixel defining layer including a plurality of second opening regions, each second opening region corresponding to at least two first opening regions in the plurality of first opening regions, and orthogonal projections of the at least two first opening regions on the base substrate being located within an orthogonal projection of the second opening region on the base substrate; and
forming light-emitting layers in the second opening regions, the light-emitting layers overspreading the second opening regions in a plane perpendicular to a thickness direction of the base substrate, respectively;
wherein before forming the plurality of first electrodes on the base substrate, the method further comprises:
forming a plurality of auxiliary patterns on the base substrate, a first electrode being disposed on an auxiliary pattern.
19. A display substrate, comprising:
a base substrate;
a plurality of first electrodes disposed on the base substrate;
a first pixel defining layer disposed on the base substrate, the first pixel defining layer including a plurality of first opening regions, and each first opening region exposing at least a portion of a first electrode of the plurality of first electrodes;
a second pixel defining layer disposed on the base substrate, the second pixel defining layer including a plurality of second opening regions, each second opening region corresponding to at least two first opening regions of the plurality of first opening regions, and orthogonal projections of the at least two first opening regions on the base substrate being located within an orthogonal projection of the second opening region on the base substrate; and
light-emitting layers disposed in the plurality of second opening regions, the light-emitting layers overspreading the plurality of second opening regions in a plane perpendicular to a thickness direction of the base substrate, respectively, wherein
a surface of the first electrode away from the base substrate is as close to the base substrate as a surface of the first pixel defining layer away from the base substrate; or
a surface of the first electrode away from the base substrate is farther away from the base substrate than a surface of the first pixel defining layer away from the base substrate.