Display substrate and display panel
A display substrate comprises a base board and a first bonding pad. The base board comprises a first surface having a first bonding district. The first bonding pad is disposed on the first surface. The first bonding pad is configured to electrically connect to a first electrode of a light emitting component in the first bonding district. The first bonding pad comprises a main bonding portion and an auxiliary bonding portion, wherein at least a part of an orthogonal projection of the main bonding portion on the base board is in the first bonding district. The auxiliary bonding portion electrically connects to the main bonding portion, wherein at least a part of an orthogonal projection of the auxiliary bonding portion on the base board is outside the first bonding district. There is a gap between the main bonding portion and the auxiliary bonding portion.
1. A display substrate comprising:
a base board with a first surface, wherein the first surface comprises a first bonding district; and
a first bonding pad disposed on the first surface, wherein a part of the first bonding pad is in the first bonding district, the first bonding pad is directly bonded to a first electrode of a light emitting component at the first bonding district, and the first bonding pad comprises:
a main bonding portion, wherein at least a part of an orthogonal projection of the main bonding portion on the base board is in the first bonding district; and
an auxiliary bonding portion electrically connecting to the main bonding portion, wherein at least a part of an orthogonal projection of the auxiliary bonding portion on the base board is outside the first bonding district, and there is a gap between the main bonding portion and the auxiliary bonding portion,
wherein the main bonding portion and the auxiliary bonding portion are disposed on the same side of the first surface;
wherein an area of the orthogonal projection of the main bonding portion on the base board is greater than an area of the orthogonal projection of the auxiliary bonding portion on the base board.
2. The display substrate according to claim 1 , wherein the auxiliary bonding portion comprises a plurality of auxiliary bonding blocks, the plurality of auxiliary bonding blocks electrically connect to each other, and there is a pad gap between two of the auxiliary bonding blocks.
3. The display substrate according to claim 2 , wherein the main bonding portion comprises a plurality of main bonding blocks, the plurality of main bonding blocks electrically connect to each other, and there is a pad gap between two of the main bonding blocks.
4. The display substrate according to claim 3 , wherein an area of an orthogonal projection of one of the main bonding blocks on the base board is greater than or equal to an area of an orthogonal projection of one of the auxiliary bonding blocks on the base board.
5. The display substrate according to claim 3 , wherein a width of each of the main bonding blocks is less than or equal to 6 micrometers and a width of each of the auxiliary bonding blocks is less than or equal to 6 micrometers.
6. The display substrate according to claim 3 , wherein the base board further comprises a tolerance district and a discrete district, the tolerance district is closer to the first bonding district than the discrete district, the plurality of auxiliary bonding blocks are in the tolerance district or in the discrete district, a distance between any one of the auxiliary bonding blocks in the tolerance district and the first bonding district is smaller than a distance between any one of the auxiliary bonding blocks in the discrete district and the first bonding district, and a total area of an orthogonal projection of auxiliary bonding portion on the tolerance district is greater than a total area of an orthogonal projection of the auxiliary bonding portion on the discrete district.
7. The display substrate according to claim 6 , wherein an area of an orthogonal projection of one of the auxiliary bonding blocks in the tolerance district on the base board is greater than an area of an orthogonal projection of one of the auxiliary bonding blocks in the discrete district on the base board.
8. The display substrate according to claim 6 , wherein a number of the auxiliary bonding blocks in the tolerance district is greater than a number of the auxiliary bonding blocks in the discrete district.
9. The display substrate according to claim 1 , wherein the base board further comprises a second bonding district, the display substrate further comprises a second bonding pad disposed on the base board, the second bonding pad is configured to electrically connect to a second electrode of the light emitting component at the second bonding district, and the first bonding pad and the second bonding pad are symmetric with respect to an axis of symmetry between the first bonding district and the second bonding district.
10. The display substrate according to claim 1 , wherein
at least a part of an orthogonal projection of the main bonding portion on the base board is located within an orthogonal projection of the first electrode on the base board; and
at least a part of the orthogonal projection of the auxiliary bonding portion on the base board is located outside the orthogonal projection of the first electrode on the base board.
11. The display substrate according to claim 1 , wherein
an orthogonal projection of the light emitting component on the base board overlaps orthogonal projections of the main bonding portion and the auxiliary bonding portion on the base board.
12. A display panel comprising:
a light emitting component with a first electrode and a second electrode; and
a display substrate, comprising:
a base board with a first surface, wherein the first surface comprises a first bonding district; and
a first bonding pad disposed on the first surface, wherein a part of first bonding pad is in the first bonding district, the first bonding pad is directly bonded to the first electrode of the light emitting component at the first bonding district, and the first bonding pad comprises:
a main bonding portion, wherein at least a part of an orthogonal projection of the main bonding portion on the base board is in the first bonding district; and
an auxiliary bonding portion electrically connecting to the main bonding portion, wherein at least a part of an orthogonal projection of the auxiliary bonding portion on the base board is outside the first bonding district, and there is a gap between the main bonding portion and the auxiliary bonding portion,
wherein the main bonding portion and the auxiliary bonding portion are disposed on the same side of the first surface;
wherein an area of the orthogonal projection of the main bonding portion on the base board is greater than an area of the orthogonal projection of the auxiliary bonding portion on the base board.
13. The display panel according to claim 12 , wherein the auxiliary bonding portion comprises a plurality of auxiliary bonding blocks, the auxiliary bonding blocks electrically connect to each other, and there is a pad gap between two of the auxiliary bonding blocks.
14. The display panel according to claim 13 , wherein the main bonding portion comprises a plurality of main bonding blocks, the main bonding blocks electrically connect to each other, and there is a pad gap between two of the main bonding blocks.
15. The display panel according to claim 14 , wherein an area of an orthogonal projection of one of the main bonding blocks on the base board is greater than or equal to an area of an orthogonal projection of one of the auxiliary bonding blocks on the base board.
16. The display panel according to claim 14 , wherein the first electrode further comprises a plurality of first sub-electrodes, the plurality of first sub-electrodes electrically connect to each other, there is an electrode gap between two of the first sub-electrodes.
17. The display panel according to claim 13 , wherein a contact area of the first electrode and the first bonding pad is less than or equal to an area of an orthogonal projection of the first electrode on the base board.
18. The display panel according to claim 17 , wherein a ratio of the contact area of the first electrode and the first bonding pad and the area of an orthogonal projection of the first electrode on the base board is less than or equal to 0.8 and greater than or equal to 0.2.
19. The display panel according to claim 13 , wherein a contact area of the first electrode and the first bonding pad is less than or equal to an area of an orthogonal projection of the light emitting component on the base board.
20. The display panel according to claim 19 , wherein a ratio of the contact area of the first electrode and the first bonding pad and the area of an orthogonal projection of the light emitting component on the base board is less than or equal to 0.8.
21. The display panel according to claim 16 , wherein a ratio of an area of an orthogonal projection of the electrode gap on a surface of the light emitting component and an area of the surface of the light emitting component is less than 0.5.
22. The display panel according to claim 16 , wherein an orthogonal projection of each of the first sub-electrodes on the base board overlaps at least a part of an orthogonal projection of one of the main bonding blocks on the base board or overlaps at least a part of an orthogonal projection of one of the auxiliary bonding blocks on the base board.
23. The display panel according to claim 22 , wherein a ratio of an orthogonal projection of each of the first sub-electrodes on the base board and an overlapping part of an orthogonal projection of each of the first sub-electrodes on the base board and an orthogonal projection of one of the main bonding blocks on the base board is greater than or equal to 0.5, or a ratio of an orthogonal projection of each of the first sub-electrodes on the base board and an overlapping part of an orthogonal projection of each of the first sub-electrodes on the base board and an orthogonal projection of one of the auxiliary bonding blocks on the base board is greater than or equal to 0.5.
24. The display panel according to claim 12 , wherein
at least a part of an orthogonal projection of the main bonding portion on the base board is located within an orthogonal projection of the first electrode on the base board; and
at least a part of the orthogonal projection of the auxiliary bonding portion on the base board is located outside the orthogonal projection of the first electrode on the base board.
25. The display panel according to claim 12 , wherein
an orthogonal projection of the light emitting component on the base board overlaps orthogonal projections of the main bonding portion and the auxiliary bonding portion on the base board.