OLED pixel defining structure with at least two intercommunicated sub-pixel defining zones of same color, manufacturing method thereof and array substrate

1. An OLED pixel defining structure, comprising a pixel defining layer containing a plurality of openings, the plurality of openings forming a plurality of sub-pixel defining zones of different colors, wherein

the plurality of sub-pixel defining zones are arranged into columns and rows, each of the columns extends in a first direction, and each of the rows extends in a second direction that is different from the first direction;

the sub-pixel defining zones in each of the columns have only one color, and the sub-pixel defining zones in each of the rows have different colors; and

at least two sub-pixel defining zones having a same color and provided in different columns intercommunicate with each other through a groove recessed in the pixel defining layer and guiding a liquid to flow only between the at least two sub-pixel defining zones.

2. The pixel defining structure of claim 1 , wherein the groove has a width smaller than or equal to widths of the plurality of sub-pixel defining zones.

3. The pixel defining structure according to claim 2 , wherein the groove has a depth equal to or smaller than depths of the plurality of openings.

4. The pixel defining structure according to claim 1 , wherein at least two sub-pixel defining zones having a same color and provided in a same column and different rows intercommunicate through another groove recessed in the pixel defining layer.

5. The pixel defining structure according to claim 1 , wherein the groove has a depth equal to or smaller than depths of the plurality of openings.

6. The pixel defining structure according to claim 1 , wherein the groove is continuous, one end of the groove is directly connected with one of the at least two sub-pixel defining zones, and the other end of the groove is directly connected with the other of the at least two sub-pixel defining zones.

7. An OLED array substrate, comprising:

a substrate;

a pixel defining structure formed on the substrate, which comprises a pixel defining layer containing a plurality of openings, the plurality of openings forming a plurality of sub-pixel defining zones of different colors; and

sub-pixel light emitting layers formed within the sub-pixel defining zones, each sub-pixel light emitting layer being formed of an organic light emitting material of a corresponding color, wherein

the plurality of sub-pixel defining zones are arranged into columns and rows, each of the columns extends in a first direction, and each of the rows extends in a second direction that is different from the first direction;

the sub-pixel defining zones in each of the columns have only one color, and the sub-pixel defining zones in each of the rows have different colors; and

at least two sub-pixel defining zones having a same color and provided in different columns intercommunicate with each other through a groove recessed in the pixel defining layer and guiding a liquid to flow only between the at least two sub-pixel defining zones.

8. The array substrate of claim 7 , wherein the groove has a width smaller than or equal to widths of the plurality of sub-pixel defining zones.

9. The array substrate of claim 8 , wherein the groove has a depth equal to or smaller than depths of the plurality of openings, and a difference between the depth of the groove and the depths of the plurality of openings is smaller than thicknesses of the light emitting layers formed in the plurality of sub-pixel defining zones.

10. The array substrate of claim 8 , wherein the sub-pixel light emitting layers in the plurality of sub-pixel defining zones of different colors differ in thickness.

11. The array substrate of claim 7 , wherein the groove has a depth equal to or smaller than depths of the plurality of openings, and a difference between the depth of the groove and the depths of the plurality of openings is smaller than thicknesses of the light emitting layers formed in the plurality of sub-pixel defining zones.

12. The array substrate of claim 7 , wherein the sub-pixel light emitting layers in the plurality of sub-pixel defining zones of different colors differ in thickness.

13. The array substrate according to claim 7 , wherein at least two sub-pixel defining zones having a same color and provided in a same column and different rows intercommunicate through another groove recessed in the pixel defining layer.

14. The array substrate according to claim 7 , wherein the groove is continuous, one end of the groove is directly connected with one of the at least two sub-pixel defining zones, and the other end of the groove is directly connected with the other of the at least two sub-pixel defining zones.

15. A manufacturing method of an OLED pixel defining structure, comprising:

applying a layer of photoresist on a pixel electrode, so as to form a photoresist thin film for pixel definition;

conducting a patterning treatment on the photoresist thin film for pixel definition, so as to form a pixel defining layer; wherein the pixel defining layer contains a plurality of openings, the plurality of openings form a plurality of sub-pixel defining zones of different colors,

the plurality of sub-pixel defining zones are arranged into columns and rows, each of the columns extends in a first direction, and each of the rows extends in a second direction that is different from the first direction;

the sub-pixel defining zones in each of the columns have only one color, and the sub-pixel defining zones in each of the rows have different colors; and at least two sub-pixel defining zones having a same color and provided in different columns intercommunicate with each other through a groove recessed in the pixel defining layer and guiding a liquid to flow only between the at least two sub-pixel defining zones.

16. The method of claim 15 , wherein the pixel defining layer between the sub-pixel defining zones of the same color that intercommunicate with each other is partially or fully removed, so that the groove between the sub-pixel defining zones has a width smaller than or equal to widths of the sub-pixel defining zones.