Display backboard and manufacturing method thereof and display device
A display backboard and a manufacturing method thereof, and a display device are provided. The display backboard includes: a driving substrate; a plurality of driving electrodes on the driving substrate; and a plurality of connection structures respectively on the plurality of driving electrodes. The connection structure includes: at least one conductive component on the driving electrode; and a restriction component on a side of the driving electrodes provided with the at least one conductive component and in at least a part of a peripheral region of the at least one conductive component. The restriction component protrudes from the driving electrode and has a first height in a direction perpendicular to the driving substrate.
1. A display backboard, comprising:
a driving substrate;
a plurality of driving electrode groups on the driving substrate, wherein each of the plurality of driving electrode groups comprises a plurality of driving electrodes to be coupled to an electronic device comprising a plurality of electrode pins, and the number of the plurality of driving electrodes is identical to the number of the plurality of electrode pins;
a plurality of connection structure groups, each of which comprises a plurality of connection structures, wherein each of the plurality of connection structures is on one of the plurality of driving electrodes of the connection structure group,
wherein the connecting structure comprises:
at least one conductive component on the driving electrode, wherein an area of a first cross-section of the at least one conductive component is negatively correlated to a distance between the first cross-section and a surface of the driving substrate, and the first cross-section is parallel to the surface of the driving substrate; and
a restriction component on a side of the driving electrode provided with the at least one conductive component and at least in a part of a peripheral region of the at least one conductive component, wherein the restriction component protrudes from the driving electrode and has a first height in a direction perpendicular to the driving substrate.
2. The display backboard of claim 1 , wherein
the at least one conductive component comprises a plurality of conductive components; and
the plurality of conductive components are arranged in an array, and/or the plurality of conductive components have a same shape.
3. The display backboard of claim 1 , wherein
the driving substrate is provided with a plurality of driving transistors;
each of the plurality of driving transistors comprises a drain, a source, a gate and an active layer; and
at least one driving electrode of the driving electrode groups is connected to at least one drain of at least one driving transistor of the plurality of driving transistors, respectively.
4. The display backboard of claim 1 , wherein a difference between the first height and a second height of the at least one conductive component in a direction perpendicular to the driving substrate is in a range of about 0 microns to about 1.5 microns.
5. The display backboard of claim 1 , wherein the restriction component is made of a conductive material.
6. The display backboard of claim 1 , wherein the at least one conductive component is spaced from the restriction component.
7. The display backboard of claim 6 , wherein the connection structure further comprises a conductive connection component on the driving electrode and between the at least one conductive component and the restriction component.
8. The display backboard of claim 7 , wherein each of the at least one conductive component comprises a main body on the driving electrode, and a conductive layer covering an entire surface of the main body or covering an entire surface of the main body except for a part of the surface of the main body distal to the driving electrode; and
the conductive connection component, the restriction component, and the conductive layer are made of a same conductive material.
9. The display backboard of claim 1 , wherein the at least one conductive component is in direct contact with the restriction component on a surface of the driving electrode.
10. The display backboard of claim 9 , wherein each of the at least one conductive component comprises a main body on the driving electrode and a conductive layer covering an entire surface of the main body or covering an entire surface of the main body except for a part of the surface of the main body distal to the driving electrode; and
the restriction component and the conductive layer are made of a same conductive material.
11. The display backboard of claim 8 , wherein a height of the conductive layer in a direction perpendicular to the driving substrate is approximately equal to a height of the restriction component in the direction perpendicular to the driving substrate.
12. The display backboard of claim 8 , wherein a material of the main body is copper, aluminum, or nickel, and a material of the conductive layer is molybdenum or copper.
13. The display backboard of claim 1 , wherein the restriction component surrounds the at least one conductive component, and an orthographic projection of the restriction component on the driving substrate is a hollow closed pattern.
14. The display backboard of claim 13 , wherein the closed pattern is circular or rectangular, and the restriction component has a thickness in a range of about 0.2 microns to about 0.3 microns in a direction parallel to a plane in which the driving substrate is located.
15. The display backboard of claim 1 , wherein the at least one conductive component has a shape of pyramid.
16. A display device, comprising the display backboard of claim 1 and a plurality of micro light emitting diodes, wherein
the plurality of connection structure groups are connected to the plurality of micro light emitting diodes, respectively.
17. The display device of claim 16 , wherein
each of the plurality of micro light emitting diodes comprises a first electrode and a second electrode, the connection structure group connected to the micro light emitting diode comprises two connection structures, which are connected to the first electrode and the second electrode of the micro light emitting diode, respectively.
18. The display device of claim 17 , wherein
of the two connection structures of the connection structure group connected to the micro light emitting diode, the restriction component of one connection structure of the two connection structures connected to the first electrode is closer to the other connection structure than the conducive component of the one connection structure; the restriction component of the other connection structure of the two connection structures connected to the second electrode is closer to the one connection structure than the conductive component of the other connection structure.
19. The display device of claim 18 , wherein
the two connection structures of the connection structure group connected to the micro light emitting diode are arranged to be axially symmetrical with each other.