Display back plate and manufacturing method therefor, and display device

1. A display back plate, comprising:

an array substrate;

a patterned first film layer formed on the array substrate; and

a pixel define layer enveloping over the patterned first film layer and for defining an organic light emitting unit;

wherein:

the pixel define layer is provided with an accommodation space therein within which a water absorbent material is provided, and, the accommodation space corresponds to the patterned first film layer;

the accommodation space has an opening formed in an upper surface and/or a lower surface of the pixel define layer;

the accommodation space is separated from the organic light emitting unit such that the water absorbent material within the accommodation space is spaced away from the organic light emitting unit.

2. The display back plate according to claim 1 , wherein:

the accommodation space is formed to run through the upper surface and the lower surface of the pixel define layer in a direction perpendicular to the array substrate.

3. The display back plate according to claim 1 , wherein:

a plurality of the accommodation spaces and a plurality of the organic light emitting units are formed to be alternately arranged in the pixel define layer.

4. The display back plate according to claim 3 , wherein:

each of the accommodation spaces is formed by one or more via holes formed in the pixel define layer.

5. A display device, comprising the display back plate according to claim 1 .

6. The display back plate according to claim 1 , wherein:

the accommodation space comprises a via hole running through the pixel define layer in a direction perpendicular to the array substrate.

7. The display back plate according to claim 1 , wherein:

the pixel define layer comprises a first pixel define layer and a second pixel define layer provided on the array substrate successively from the bottom up.

8. The display back plate according to claim 7 , wherein:

the accommodation space comprises a first via hole running through the first pixel define layer in a direction perpendicular to the array substrate.

9. The display back plate according to claim 7 , wherein:

the accommodation space comprises a via hole running through the first and the second pixel define layers in a direction perpendicular to the array substrate.

10. A manufacturing method for a display back plate, the method comprising:

providing an array substrate;

forming a first film layer having water absorbent performance on the array substrate, and patterning the first film layer in accordance with a predetermined pattern; and

forming a pixel define layer on the patterned first film layer, the pixel define layer enveloping over the patterned first film layer such that an accommodation space corresponding to the patterned first film layer is formed in the pixel define layer;

wherein, the accommodation space is separated from an organic light emitting unit in the pixel define layer such that the first film layer having water absorbent performance and accommodated within the accommodation space is spaced away from the organic light emitting unit.

11. The method according to claim 10 , wherein:

the first film layer comprises a film layer mixed with a water absorbent material.

12. The method according to claim 10 , wherein:

a plurality of the accommodation spaces and a plurality of the organic light emitting units are formed to be alternately arranged in the pixel define layer; and

each of the accommodation spaces is formed by one or more via holes formed in the pixel define layer.

13. The method according to claim 10 , wherein:

the accommodation space comprises a via hole running through the pixel define layer in a direction perpendicular to the array substrate.

14. The method according to claim 10 , wherein:

the pixel define layer comprises a first pixel define layer and a second pixel define layer provided on the array substrate successively from the bottom up.