US-12628503-B2 - Display device, display panel and manufacturing method thereof

US12628503B2US 12628503 B2US12628503 B2US 12628503B2US-12628503-B2

Abstract

A display device, a display panel, and a manufacturing method thereof are proposed. The display panel includes a substrate, a first insulation layer, a first electrode layer, a pixel definition layer, a light-emitting function layer and a second electrode.

Inventors

Kuanta HUANG
Yuhao LEE
Dacheng Zhang
Hui Tong
Xiaobin Shen
Shipeng Li
Chao Yang
Dongsheng Li

Assignees

BOE TECHNOLOGY GROUP CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20230616

Claims (9)

1 . A display panel, comprising: a substrate; a first insulation layer, located on a side of the substrate; a first electrode layer, located on a surface of the first insulation layer away from the substrate and comprising a plurality of first electrodes, wherein the plurality of first electrodes comprise a first sub-electrode for forming a first sub-pixel and a second sub-electrode for forming a second sub-pixel; a pixel definition layer, located on the surface of the first insulation layer away from the substrate and exposing each of the first electrodes, wherein the pixel definition layer covers an edge of the first electrode, and a first part of the pixel definition layer covering an edge of the first sub-electrode is higher than a second part of the pixel definition layer covering an edge of the second sub-electrode; a light-emitting functional layer, covering the pixel definition layer and the first electrodes exposed by the pixel definition layer; and a second electrode, covering the light-emitting function layer, wherein the second electrode is formed with a first protrusion at a position corresponding to the edge of the first sub-electrode, wherein the pixel definition layer is provided with a plurality of openings, each opening exposing at least a portion of a middle part of the first electrode; and the first protrusion comprises a first sloped portion close to the opening and a second sloped portion away from the opening, an extending span of the first sloped portion being smaller than an extending span of the second sloped portion in an extending plane of the display panel, and a vertical height of the first sloped portion being smaller than a vertical height of the second sloped portion in a vertical direction perpendicular to the extending plane of the display panel.
2 . The display panel according to claim 1 , wherein a first distance between the first sub-electrode and the second electrode is less than a second distance between the second sub-electrode and the second electrode; and the first distance is a microcavity depth of the first sub-pixel, and the second distance is a microcavity depth of the second sub-pixel.
3 . The display panel according to claim 1 , wherein the first sub-electrode and the second sub-electrode are disposed adjacent to each other.
4 . The display panel according to claim 1 , wherein the second electrode is formed with a second protrusion at a position corresponding to the edge of the second sub-electrode, and a thickness of the second protrusion is less than a thickness of the first protrusion.
5 . The display panel according to claim 3 , wherein the light-emitting functional layer is formed with a third protrusion at a position corresponding to the edge of the first sub-electrode, the light-emitting functional layer is formed with a fourth protrusion at a position corresponding to the edge of the second sub-electrode, and the first protrusion covers the third protrusion, and the second protrusion covers the fourth protrusion.
6 . The display panel according to claim 1 , wherein a plurality of driving transistors are provided on the substrate, and an area, corresponding to one of the driving transistors, of the substrate comprises an active region and a source and a drain located at both ends of the active region; and an orthographic projection on the substrate of the first protrusion overlaps with an orthographic projection on the substrate of the active region.
7 . The display panel according to claim 2 , wherein a thickness of the first sub-electrode is larger than a thickness of the second sub-electrode.
8 . The display panel according to claim 7 , wherein the first electrode comprises a first conductive layer, a second conductive layer, and a third conductive layer stacked in a direction away from the substrate, wherein the first conductive layer is made of a light-reflective material, and the microcavity depth is a distance between the first conductive layer and the second electrode; and a thickness of the first conductive layer of the first sub-electrode is larger than a thickness of the first conductive layer of the second sub-electrode, a thickness of the second conductive layer of the first sub-electrode is the same as a thickness of the second conductive layer of the second sub-electrode, and a thickness of the third conductive layer of the first sub-electrode is the same as a thickness of the third conductive layer of the second sub-electrode.
9 . A display device, comprising a display panel, wherein the display panel comprises: a substrate; a first insulation layer, located on a side of the substrate; a first electrode layer, located on a surface of the first insulation layer away from the substrate and comprising a plurality of first electrodes, wherein the plurality of first electrodes comprise a first sub-electrode for forming a first sub-pixel and a second sub-electrode for forming a second sub-pixel; a pixel definition layer, located on the surface of the first insulation layer away from the substrate and exposing each of the first electrodes, wherein the pixel definition layer covers an edge of the first electrode, and a first part of the pixel definition layer covering an edge of the first sub-electrode is higher than a second part of the pixel definition layer covering an edge of the second sub-electrode; a light-emitting functional layer, covering the pixel definition layer and the first electrodes exposed by the pixel definition layer; and a second electrode, covering the light-emitting function layer, wherein the second electrode is formed with a first protrusion at a position corresponding to the edge of the first sub-electrode, wherein the pixel definition layer is provided with a plurality of openings, each opening exposing at least a portion of a middle part of the first electrode; and the first protrusion comprises a first sloped portion close to the opening and a second sloped portion away from the opening, an extending span of the first sloped portion being smaller than an extending span of the second sloped portion in an extending plane of the display panel, and a vertical height of the first sloped portion being smaller than a vertical height of the second sloped portion in a vertical direction perpendicular to the extending plane of the display panel.

Description

CROSS REFERENCE TO RELATED APPLICATION(S) The present application is a Continuation Application of U.S. patent application Ser. No. 17/428,326, which is a 35 U.S.C. 371 national phase application of PCT International Application No. PCT/CN2021/088701, which claims the priority of PCT application No. PCT/CN2020/085955, the entire contents of which are all incorporated herein by reference in their entireties. TECHNICAL FIELD The present disclosure relates to the field of display technology, and in particular, to a display device, a display panel, and a manufacturing method of the display panel. BACKGROUND Currently, Organic Light-Emitting Diode (OLED) display panels are more and more widely used. In an OLED display panel, the light-emitting device usually includes a plurality of OLED light-emitting units distributed in an array, and each light-emitting unit can emit light independently in order to display an image. However, due to reasons in the manufacturing process, the luminescence stability of the OLED light-emitting device still needs to be improved. It should be noted that the information disclosed in the background section above is only used to enhance understanding the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. SUMMARY The purpose of the present disclosure is to overcome the above-mentioned shortcomings of the prior art and to provide a display device, a display panel, and a manufacturing method of the display panel. According to an aspect of the present disclosure, there is provided a display panel, including: a substrate;a first insulation layer, provided on a side of the substrate, wherein the first insulation layer has a plurality of pixel regions distributed in an array and a seperation region separating the pixel regions;a first electrode layer, provided on a surface of the first insulation layer away from the substrate and including a plurality of first electrodes, wherein the orthographic projection of each of the first electrodes on the first insulation layer is located in a respective pixel region;a pixel definition layer, provided on the surface of the first insulation layer away from the substrate and exposing each of the first electrodes, wherein the pixel definition layer is formed with a pixel definition groove in a region corresponding to the separation region, a middle part of the pixel definition groove has a first protrusion protruding in a direction away from the substrate, and a sub-groove is formed between the sidewall of the first protrusion and the sidewall of the pixel definition groove;a light-emitting functional layer, covering the pixel definition layer and the first electrodes exposed by the pixel definition layer; anda second electrode, covering the light-emitting function layer. In an exemplary embodiment of the present disclosure, the two sidewalls of the first protrusion are inclined surfaces that expand toward the substrate, and the two sidewalls of the pixel definition groove are inclined surfaces that contract toward the substrate. In an exemplary embodiment of the present disclosure, the slope of the sidewall of the first protrusion is different from the slope of the sidewall of the pixel definition groove. In an exemplary embodiment of the present disclosure, the thickness of the first protrusion is smaller than the depth of the pixel definition groove. In an exemplary embodiment of the present disclosure, the orthographic projection of the middle part of the pixel definition groove on the first insulation layer is located in the separation region. In an exemplary embodiment of the present disclosure, the pixel definition layer includes a spacing part and an extension part, wherein the spacing part is located in an area other than the first electrodes, and the pixel definition groove is at least partially provided in the spacing part. Besides, the extension part is connected to the spacing part, extends to the surface of the first electrodes away from the substrate, and covers the first electrodes partially. In an exemplary embodiment of the present disclosure, the width of the extension part covering any one of the first electrodes is smaller than the width of the spacing part between two adjacent ones of the first electrodes. In an exemplary embodiment of the present disclosure, at least two of the first electrodes have different thicknesses. In an exemplary embodiment of the present disclosure, the maximum depth of the pixel definition groove is not more than 60% of the sum of the thicknesses of the light-emitting function layer and the first electrodes. According to an aspect of the present disclosure, there is provided a display panel including: a substrate;a first insulation layer, provided on a side of the substrate;a first electrode layer, provided on a surface of the first insulation layer away from the substrate and including a plurality o