Driving backplane and display apparatus

1. A driving backplane, comprising:

a base substrate;

a first conducting layer disposed on one side of the base substrate;

a second conducting layer disposed on one side, facing away from the base substrate, of the first conducting layer; and

a first insulating layer disposed between the first conducting layer and the second conducting layer;

wherein the second conducting layer comprises a plurality of pads;

each of the plurality of pads is connected with the first conducting layer through at least two first via holes; and

each of the at least two first via holes penetrates through the first insulating layer and exposes part of the first conducting layer.

2. The driving backplane according to claim 1 , wherein pore diameters of the at least two first via holes are 2 μm-40 μm.

3. The driving backplane according to claim 2 , wherein each pad corresponds to the at least two first via holes; and

in a plurality of first via holes corresponding to a same pad, the pore diameters of at least two of the plurality of first via holes corresponding to the same pad are different.

4. The driving backplane according to claim 2 , wherein each pad corresponds to the at least two first via holes; and the pore diameters of the at least two first via holes corresponding to the each pad are identical.

5. The driving backplane according to claim 1 , wherein the first insulating layer between the first conducting layer and the second conducting layer comprises a plurality of sublayers; and

part of the sublayers are organic sublayers, and part of the sublayers are inorganic sublayers.

6. The driving backplane according to claim 5 , the inorganic sublayers are respectively attached to the first conducting layer and the second conducting layer; and

at least one organic sublayer is disposed between the inorganic sublayers respectively attached to the first conducting layer and the second conducting layer.

7. The driving backplane according to claim 1 , wherein a surface, facing away from the base substrate, of each pad has a concave-convex structure.

8. The driving backplane according to claim 1 , wherein the first conducting layer has a plurality of opening regions and a plurality of conducting islands;

each of the plurality of opening regions is internally provided with at least one of the plurality of conducting islands;

a gap is formed between a periphery of each of the plurality of conducting islands and an edge of an corresponding opening region; and

each pad is electrically connected with the at least one conducting island.

9. The driving backplane according to claim 8 , wherein the gap between the periphery of each conducting island and the edge of the corresponding opening region is greater than or equal to a preset value; and

the preset value comprises a sum of a process tolerance, an impurity maximum size and a reserved spacing.

10. The driving backplane according to claim 8 , wherein one of the plurality of pads is connected with the plurality of conducting islands through the at least two first via holes;

wherein the plurality of conducting islands corresponding to the one pad are mutually independent; or,

at least one part of the plurality of conducting islands corresponding to the one pad are mutually connected.

11. The driving backplane according to claim 8 , wherein a material of the conducting islands and a material of the first conducting layer are identical.

12. The driving backplane according to claim 11 , wherein the materials of both the conducting islands and the first conducting layer are copper.

13. The driving backplane according to claim 8 , further comprising: a second insulating layer disposed on one side, facing away from the base substrate, of the second conducting layer;

wherein the second insulating layer has second via holes, and the second via holes expose the plurality of pads.

14. The driving backplane according to claim 13 , wherein in each pad and a second via hole corresponding to the each pad, an orthographic projection of the concave-convex structure on the surface, facing away from the base substrate, of the each pad on the base substrate is disposed in an orthographic projection of the second via hole on the base substrate.

15. The driving backplane according to claim 13 , further comprising: a component;

wherein the component is connected with the plurality of pads through a welding layer disposed in the second via holes.

16. The driving backplane according to claim 15 , the pads and pin terminals of the component connected with the pads are identical in quantity.

17. A display apparatus, comprising the driving backplane according to claim 1 .