Display panel, preparation method thereof and display device

1. A display panel, comprising: a light-emitting substrate and a color filter substrate which are disposed opposite to each other,

wherein the color filter substrate comprises:

a base, which comprises a display area;

a baffle wall layer located on one side of the base and located in the display area, wherein the baffle wall layer comprises a plurality of baffle wall structures; and

a reflective metal layer, wherein the reflective metal layer at least comprises a first reflective subsection, and the first reflective subsection covers a surface of each of at least one of the plurality of baffle wall structures, the surface being at a side of the each of the at least one of the plurality of baffle wall structures facing the light-emitting substrate,

wherein the first reflective subsection comprises a plurality of first metal subsections and a plurality of second metal subsections; on a plane where the first reflective subsection is located, adjacent ones of the plurality of first metal subsections are independently disposed, and adjacent ones of the plurality of second metal subsections along a first direction are connected to each other; and the plurality of first metal subsections are multiplexed as first-type touch electrodes, and the plurality of second metal subsections are multiplexed as second-type touch electrodes; and

the light-emitting substrate comprises:

a plurality of light-emitting diodes and an electrode layer, wherein the electrode layer is disposed on a side, close to the color filter substrate, of the light-emitting substrate, wherein the reflective metal layer is located between the baffle wall layer and the electrode layer, wherein the electrode layer comprises first electrode subsections and a second electrode subsection which are disposed independently, and adjacent ones of the plurality of first metal subsections along a second direction are electrically connected to each other through at least one first electrode subsection; and the first direction and the second direction intersect and are both parallel to the plane where the first reflective subsection is located.

2. The display panel of claim 1 , wherein the plurality of first metal subsections are in contact with and electrically connected to the first electrode subsections.

3. The display panel of claim 2 , wherein the plurality of baffle wall structures comprise first-type baffle wall structures and second-type baffle wall structures;

each of the plurality of first metal subsections comprises a first sub-metal subsection and a second sub-metal subsection, a vertical projection of the first sub-metal subsection on a plane where the base is located overlaps a vertical projection of a respective one of the first-type baffle wall structures on the plane where the base is located, a vertical projection of each of the second-type baffle wall structures on the plane where the base is located overlaps a vertical projection of the second sub-metal subsection of a respective one of the plurality of first metal subsections and a vertical projection of a respective one of the plurality of second metal subsections on the plane where the substrate is located; and

along a third direction, a height of each of the first-type baffle wall structures is greater than a height of each of the second-type baffle wall structures, and the third direction is parallel to a light-outgoing direction of the display panel.

4. The display panel of claim 3 , wherein the first sub-metal subsection is located on at least one of a first end of the each of the plurality of first metal subsections or a second end of the each of the plurality of first metal subsections, and the first end is opposite to the second end in the second direction.

5. The display panel of claim 3 , wherein each of the first-type baffle wall structures comprises a first sub-baffle-wall structure and a second sub-baffle-wall structure laminated in the third direction; and

each of the second-type baffle wall structures is disposed on a same layer and has a same height as the first sub-baffle-wall structure, or each of the second-type baffle wall structures is disposed on a same layer and has a same height as the second sub-baffle-wall structure.

6. The display panel of claim 2 , wherein the light-emitting substrate comprises a light-emitting diode light-emitting substrate; and the light-emitting diode light-emitting substrate comprises a cathode layer multiplexed as the electrode layer.

7. The display panel of claim 6 , wherein the cathode layer comprises a first cathode subsection and a second cathode subsection which are disposed independently, adjacent ones of the plurality of first metal subsections along the second direction are electrically connected through the first cathode subsection, and the second cathode subsection serves as a common cathode for the plurality of light-emitting diodes in the light-emitting diode light-emitting substrate;

along a third direction, a thickness of the first cathode subsection is greater than a thickness of the second cathode subsection, and the third direction is parallel to a light-outgoing direction of the display panel.

8. The display panel of claim 2 , wherein the light-emitting substrate comprises a light-emitting diode light-emitting substrate;

the light-emitting diode light-emitting substrate comprises a eutectic layer, and the eutectic layer is multiplexed as the electrode layer, and

the eutectic layer comprises a first eutectic subsection and a second eutectic subsection, adjacent ones of the plurality of first metal subsections along the second direction are in contact with and electrically connected to the first eutectic subsection, and the second eutectic subsection serves as an eutectic electrode of the plurality of light-emitting diodes in the light-emitting diode light-emitting substrate.

9. The display panel of claim 8 , wherein the eutectic layer further comprises a third eutectic subsection, a vertical projection of the third eutectic subsection on a plane where the base is located overlaps vertical projections of the plurality of the second metal subsections and a part of each of the plurality of the first metal subsections on the plane where the base is located; and

along a third direction, a thickness of the third eutectic subsection is less than a thickness of the first eutectic subsection, and the third direction is parallel to a light-outgoing direction of the display panel.

10. The display panel of claim 1 , wherein the adjacent ones of the plurality of first metal subsections along the second direction are electrically connected to each other by at least two first electrode subsections.

11. The display panel of claim 1 , wherein the adjacent ones of the plurality of second metal subsections along the first direction are electrically connected to each other by at least one connection portion, and the at least one connection portion is disposed in a same layer as the first reflective subsection.

12. The display panel of claim 1 , wherein the light-emitting substrate further comprises a filling structure located between each of the first electrode subsections and the second electrode subsection; and

a dielectric constant of the filling structure is less than a dielectric constant of air.

13. The display panel of claim 1 , wherein the base further comprises a non-display area; the display panel further comprises a touch electrode trace disposed in the non-display area; and

the touch electrode trace comprises a first-type touch electrode trace and a second-type touch electrode trace, wherein the first-type touch electrode trace is electrically connected to the first-type touch electrodes and the second-type touch electrode trace is electrically connected to the second-type touch electrodes, and wherein the first-type touch electrode trace and the second-type touch electrode trace are disposed on a same layer as the first reflective subsection.

14. The display panel of claim 1 , wherein

the baffle wall layer further comprises a plurality of baffle wall openings, and each of the plurality of baffle wall openings is disposed between adjacent ones of the plurality of baffle wall structures; and

the reflective metal layer further comprises a second reflective subsection, and the second reflective subsection covers a surface on a side, close to the plurality of baffle wall openings, of each of at least one of the plurality of baffle wall structures.

15. A preparation method for a display panel, comprising:

preparing a color filter substrate and a light-emitting substrate separately,

wherein preparing the color film substrate comprises:

providing a base, wherein the base comprises a display area;

forming a baffle wall layer, wherein the baffle wall layer is located on a side, close to the light-emitting substrate, of the substrate and comprises a plurality of baffle wall structures;

forming a reflective metal layer, wherein the reflective metal layer at least comprises a first reflective subsection, the first reflective subsection covers a surface of each of at least one of the plurality of baffle wall structures, the surface being at a side of the each of the at least one of the plurality of baffle wall structures facing the light-emitting substrate;

etching the first reflective subsection to form a plurality of first metal subsections and a plurality of second metal subsections, wherein on a plane where the first reflective subsection is located, adjacent ones of the plurality of first metal subsections are disposed independently, and adjacent ones of the plurality of second metal subsections along a first direction are connected to each other; the plurality of first metal subsections are multiplexed as first-type touch electrodes, and the plurality of second metal subsections are multiplexed as second-type touch electrodes; and

wherein preparing the light-emitting substrate comprises:

forming a plurality of light-emitting diodes and an electrode layer, wherein the electrode layer is located on a side, close to the color filter substrate, of the light-emitting substrate, wherein the reflective metal layer is located between the baffle wall layer and the electrode layer, wherein the electrode layer comprises first electrode subsections and a second electrode subsection which are disposed independently, and adjacent ones of the plurality of first metal subsections along a second direction are electrically connected to each other through at least one first electrode subsection; the first direction and the second direction intersect and are both parallel to a plane where the plurality of first metal subsections is located.

16. The preparation method of claim 15 , wherein the plurality of baffle wall structures comprise first-type baffle wall structures and second-type baffle wall structures;

each of the plurality of first metal subsections comprises a first sub-metal subsection and a second sub-metal subsection, a vertical projection of the first sub-metal subsection on a plane where the base is located overlaps a vertical projection of a respective one of the first-type baffle wall structures on the plane where the base is located, a vertical projection of each of the second-type baffle wall structures on the plane where the base is located overlaps a vertical projection of the second sub-metal subsection of a respective one of the plurality of first metal subsections and a vertical projection of a respective one of the plurality of second metal subsections on the plane where the substrate is located; and

forming the plurality of baffle wall structures comprises:

forming the first-type baffle wall structure and the second-type baffle wall structure by using a semi-mask process, wherein along a third direction, a height of each of the first-type baffle wall structures is greater than a height of each of second-type baffle wall structures, and the third direction is parallel to a light-outgoing direction of the display panel.

17. The preparation method of claim 15 , wherein the plurality of baffle wall structures comprise first-type baffle wall structures and second-type baffle wall structures;

each of the plurality of first metal subsections comprises a first sub-metal subsection and a second sub-metal subsection, a vertical projection of the first sub-metal subsection on a plane where the substrate is located overlaps a vertical projection of a respective one of the first-type baffle wall structures on the plane where the substrate is located, a vertical projection of each of the second-type baffle wall structures on the plane where the base is located overlaps a vertical projection of the second sub-metal subsection of a respective one of the plurality of first metal subsections and a vertical projection of a respective one of the plurality of second metal subsections on the plane where the substrate is located; and

forming the plurality of baffle wall structures comprises one of:

forming a first sub-baffle-wall structure of each of the first-type baffle wall structures by using a first mask process; and forming each of the second-type baffle wall structures and a second sub-baffle-wall structure of each of the first-type baffle wall structures by using a second mask process, wherein the second sub-baffle-wall structure is located on a side, close to the light-emitting substrate, of the first sub-baffle-wall structure, and each of the second-type baffle wall structures is disposed on a same layer and has a same height as the second sub-baffle-wall structure; or

forming each of the second-type baffle wall structures and a first sub-baffle-wall structure of each of the first-type baffle wall structures by using a first mask process, wherein each of the second-type baffle wall structures is disposed on a same layer and has a same height as the first sub-baffle-wall structure; and forming a second sub-baffle-wall structure of each of the first-type baffle wall structures by using a second mask process, wherein the second sub-baffle-wall structure is located on a side, close to the light-emitting substrate, of the first sub-baffle-wall structure.

18. The preparation method of claim 15 , wherein the light-emitting substrate comprises a light-emitting diode light-emitting substrate;

forming the electrode layer comprising the first electrode subsections and the second electrode subsection which are disposed independently comprises:

forming a cathode layer;

etching the cathode layer to obtain a first cathode structure and a second cathode structure which are disposed independently, wherein along a third direction, a thickness of the first cathode structure is same as a thickness of the second cathode structure, and the third direction is parallel to a light-outgoing direction of the display panel; and

preparing a cathode additional structure on a side of the first cathode structure, wherein along the third direction, the cathode additional structure and the first cathode structure are laminated to obtain a first cathode subsection, and the second cathode structure is a second cathode subsection; along the third direction, a thickness of the first cathode subsection is greater than a thickness of the second cathode subsection; adjacent ones of the plurality of first metal subsections along the second direction are in contact with and electrically connected to the first cathode subsection, and the second cathode subsection serves as a common cathode for the plurality of light-emitting diodes in the light-emitting diode light-emitting substrate.

19. The preparation method of claim 15 , wherein the light-emitting substrate comprises a light-emitting diode light-emitting substrate;

forming the electrode layer comprising the first electrode subsections and the second electrode subsection which are disposed independently comprises:

forming a eutectic layer; and

etching the eutectic layer to obtain a first eutectic subsection and a second eutectic subsection, wherein adjacent ones of the plurality of first metal subsections along the second direction are in contact with and electrically connected to the first eutectic subsection, and the second eutectic subsection serves as an eutectic electrode of the plurality of light-emitting diodes in the light-emitting diode light-emitting substrate.

20. A display device, comprising a display panel, wherein the display panel comprises: a light-emitting substrate and a color filter substrate which are disposed opposite to each other,

wherein the color filter substrate comprises:

a base, which comprises a display area;

a baffle wall layer located on one side of the base and located in the display area, wherein the baffle wall layer comprises a plurality of baffle wall structures; and

a reflective metal layer, wherein the reflective metal layer at least comprises a first reflective subsection, and the first reflective subsection covers a surface of each of at least one of the plurality of baffle wall structures, the surface being at a side of the each of the at least one of the plurality of baffle wall structures facing the light-emitting substrate,

wherein the first reflective subsection comprises a plurality of first metal subsections and a plurality of second metal subsections; on a plane where the first reflective subsection is located, adjacent ones of the plurality of first metal subsections are independently disposed, and adjacent ones of the plurality of second metal subsections along a first direction are connected to each other; and the plurality of first metal subsections are multiplexed as first-type touch electrodes, and the plurality of second metal subsections are multiplexed as second-type touch electrodes; and

the light-emitting substrate comprises:

a plurality of light-emitting diodes and an electrode layer, wherein the electrode layer is disposed on a side, close to the color filter substrate, of the light-emitting substrate, wherein the reflective metal layer is located between the baffle wall layer and the electrode layer, wherein the electrode layer comprises first electrode subsections and a second electrode subsection which are disposed independently, and adjacent ones of the plurality of first metal subsections along a second direction are electrically connected to each other through at least one first electrode subsection; and the first direction and the second direction intersect and are both parallel to the plane where the first reflective subsection is located.