US-20260130056-A1 - DISPLAY PANEL AND DISPLAY DEVICE

Abstract

A display panel includes a substrate, a first electrode layer having a number of first electrodes spaced apart from each other on one side of the substrate, and a pixel definition layer disposed on the first electrode layer and exposing a portion of the first electrode to form a pixel opening. The pixel definition layer covers edge portions of the first electrode. The pixel definition layer includes a number of sub-layers. At least one of the sub-layers has a thickness greater than a thickness of the first electrode.

Inventors

• Zhiwei Zhou
• PENG QIN
• Jinfang Zhang
• Yang Yang
• Liusong NI

Assignees

• Hefei Visionox Technology Co., Ltd.
• VISIONOX TECHNOLOGY INC.

Dates

Publication Date

20260507

Application Date

20250917

Priority Date

20241104

Claims (20)

1. 1 . A display panel, comprising: a substrate; a first electrode layer, comprising a plurality of first electrodes spaced apart from each other on one side of the substrate; and a pixel definition layer, disposed on the first electrode layer and exposing a portion of the first electrode to form a pixel opening, the pixel definition layer covering an edge portion of the first electrode; wherein the pixel definition layer comprises a plurality of sub-layers, and at least one of the sub-layers has a thickness greater than a thickness of the first electrode.
2. 2 . The display panel according to claim 1 , wherein the sub-layers are made of inorganic material.
3. 3 . The display panel according to claim 1 , wherein the plurality of sub-layers comprise a first sub-layer and a second sub-layer stacked sequentially in a direction away from the substrate.
4. 4 . The display panel according to claim 3 , wherein a ratio of the thickness of the first sub-layer to the thickness of the first electrode, and another ratio of the thickness of the second sub-layer to the thickness of the first electrode, are respectively within a range of 0.8 to 6.25.
5. 5 . The display panel according to claim 4 , wherein the thickness of the first sub-layer is greater than the thickness of the first electrode.
6. 6 . The display panel according to claim 5 , wherein the first sub-layer is in contact with the first electrode.
7. 7 . The display panel according to claim 4 , wherein the thickness of the second sub-layer is greater than the thickness of the first electrode.
8. 8 . The display panel according to claim 4 , wherein the second sub-layer has an etching resistance greater than that of the first sub-layer.
9. 9 . The display panel according to claim 4 , wherein the first sub-layer and the second sub-layer are made of different materials.
10. 10 . The display panel according to claim 1 , wherein the first electrode comprises a first sub-electrode and a second sub-electrode arranged in a stacked manner, the first sub-electrode is located on a side of the second sub-electrode proximate to the substrate, and an orthogonal projection of the first sub-electrode on the substrate is located within a range of an orthogonal projection of the second sub-electrode on the substrate.
11. 11 . The display panel according to claim 10 , wherein the first electrode further comprises a third sub-electrode, and the third sub-electrode is located on a side of the second sub-electrode away from the substrate.
12. 12 . The display panel according to claim 10 , wherein the first sub-electrode and the third sub-electrode are made of a same material.
13. 13 . The display panel according to claim 10 , wherein a distance between an edge of an orthogonal projection of the first sub-electrode on the substrate and an edge of an orthogonal projection of the second sub-electrode on the substrate is greater than or equal to 0.1 μm and less than or equal to 1 μm.
14. 14 . The display panel according to claim 1 , wherein the pixel definition layer comprises a groove, an opening of the groove is located on a side of the pixel definition layer away from the substrate, and an orthogonal projection of the groove on the substrate is located between adjacent first electrodes.
15. 15 . The display panel according to claim 1 , further comprising an isolation structure located on a side of the pixel definition layer away from the substrate, wherein the isolation structure is provided to form a plurality of isolation openings, the pixel opening is located within the isolation opening; the display panel further comprises a second electrode and a light-emitting layer, the second electrode is located on a side of the first electrode away from the substrate, the light-emitting layer is located between the first electrode and the second electrode; adjacent light-emitting layers and adjacent second electrodes are disconnected at the isolation structure.
16. 16 . The display panel according to claim 15 , wherein the isolation structure comprises a first portion and a second portion, the first portion is located on a side of the second portion proximate to the substrate, and the second portion extends outwardly along a side wall edge of the first portion.
17. 17 . The display panel according to claim 16 , wherein the isolation structure further comprises a third portion, the third portion is located on a side of the first portion proximate to the substrate, and the third portion extends outwardly along a side wall edge of the first portion.
18. 18 . The display panel according to claim 16 , wherein the pixel definition layer comprises a groove, an opening of the groove is located on a side of the pixel definition layer away from the substrate, and an orthogonal projection of the groove on the substrate is located between adjacent first electrodes; an orthogonal projection of the first portion on the substrate is located within a range of an orthogonal projection of the groove on the substrate; or an orthogonal projection of the first portion on the substrate covers an orthogonal projection of the groove on the substrate.
19. 19 . The display panel according to claim 15 , further comprising an inorganic encapsulation portion located on a side of the second electrode away from the substrate; adjacent inorganic encapsulation portions are disconnected on a side of the isolation structure away from the substrate.
20. 20 . A display device, comprising: a display panel, comprising: a substrate; a first electrode layer, comprising a plurality of first electrodes spaced apart from each other on one side of the substrate; and a pixel definition layer, disposed on the first electrode layer and exposing a portion of the first electrode to form a pixel opening, the pixel definition layer covering an edge portion of the first electrode; wherein the pixel definition layer comprises a plurality of sub-layers, and at least one of the sub-layers has a thickness greater than a thickness of the first electrode.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS The present application claims priority to the Chinese Patent Application No. 202411571726.0, filed on Nov. 4, 2024, and the entire contents of the aforementioned application are hereby incorporated by reference in its entirety. FIELD The present application relates to the field of display technology, and specifically relates to a display panel and a display device. BACKGROUND In recent years, display products have achieved rapid development with continuously increasing aperture ratio and improving display effect. However, the reliability of display products still needs to be improved. SUMMARY In view of this, embodiments of the present application provide a display panel and a display device, which are able to improve low reliability of display products. An embodiment of a first aspect of the present application provides a display. The display panel includes a substrate; a first electrode layer including first electrodes spaced apart from each other on one side of the substrate; and a pixel definition layer disposed on the first electrode layer and exposing a portion of the first electrode to form a pixel opening, and the pixel definition layer covers edge portions of the first electrode; and the pixel definition layer includes sub-layers, and at least one of the sub-layers has a thickness greater than a thickness of the first electrode. The advantage is that: it ensures good step coverage of the at least one sub-layer, resulting in good film formation at the step climbing position without cracks, to improve the reliability of the display panel. In some embodiments, the sub-layers are made of inorganic material. In some embodiments, the sub-layers include a first sub-layer and a second sub-layer stacked sequentially in a direction away from the substrate; in one embodiment, ratios of the thickness of the first sub-layer and the thickness of the second sub-layer to the thickness of the first electrode are respectively within a range of 0.8 to 6.25; in one embodiment, the thickness of the first sub-layer is greater than or equal to 1000 μm and less than or equal to 5000 μm; in one embodiment, the thickness of the second sub-layer is greater than or equal to 500 μm and less than or equal to 3000 μm. In some embodiments, the thickness of the first sub-layer is greater than the thickness of the first electrode; in one embodiment, the thickness of the first sub-layer is greater than or equal to 2000 μm and less than or equal to 5000 μm. In some embodiments, the first sub-layer is in contact with the first electrode. The advantage is that it can ensure good step coverage of the first sub-layer, thus preventing cracks from forming when climbing steps at the edge portions of the first electrode. Meanwhile, the first sub-layer can compensate for the step height formed by the first electrode, reducing the step climbing difficulty for the second sub-layer. In some embodiments, the thickness of the second sub-layer is greater than the thickness of the first electrode; in one embodiment, the thickness of the second sub-layer is greater than or equal to 1000 μm and less than or equal to 2500 μm. In some embodiments, the first sub-layer has better film-forming property than the second inorganic sub-layer; and/or the second sub-layer has better etching resistance than the first inorganic sub-layer. The advantage is that the thickness requirement for the first sub-layer 131 is relatively low, which is conducive to product thinning. The second sub-layer has better etching resistance than the first sub-layer, which can simultaneously improve the etching resistance of the pixel definition layer and further improve the reliability of the display panel. In some embodiments, the first sub-layer and the second sub-layer are made of different materials; in one embodiment, the material of the first sub-layer includes silicon nitride; in one embodiment, the material of the second sub-layer includes silicon oxide. In some embodiments, the first electrode includes a first sub-electrode layer and a second sub-electrode layer stacked together, the first sub-electrode layer is located on a side of the second sub-electrode layer proximate to the substrate, and an orthogonal projection of the first sub-electrode layer on the substrate is located within a range of an orthogonal projection of the second sub-electrode layer on the substrate; in one embodiment, the first electrode further includes a third sub-electrode layer, and the third sub-electrode layer is located on a side of the second sub-electrode layer away from the substrate; in one embodiment, the first sub-electrode layer and the third sub-electrode layer are made of same material; in one embodiment, the thickness of the first sub-electrode layer is greater than the thickness of the third sub-electrode layer; in one embodiment, the material of the first sub-electrode layer includes ITO; in one embodiment, the material of the second sub-elec