CN-122003976-A - Display panel and display device

CN122003976ACN 122003976 ACN122003976 ACN 122003976ACN-122003976-A

Abstract

A display panel comprises a drive substrate (100), wherein the drive substrate (100) comprises a plurality of pixel circuits (110), a light emitting device layer (200) arranged on one side of the drive substrate (100), wherein the light emitting device layer (200) comprises a first electrode layer (210), a pixel definition layer (220), a light emitting layer (230) and a second electrode layer (240), the first electrode layer (210) comprises a plurality of first electrode blocks (211), the front projections of different first electrode blocks (211) on the drive substrate (100) are not overlapped, the first electrode blocks (211) are electrically connected with the pixel circuits (110), the pixel definition layer (220) comprises a plurality of pixel openings (201), the front projections of the pixel openings (201) on the drive substrate (100) fall into the front projections of the first electrode blocks (211) on the drive substrate (100), the pixel definition layer (220) covers the edges of the first electrode blocks (211), the pixel definition layer (220) comprises a first electrode block (211) overlapped with the edges of the first electrode blocks (227), the first slope (227) is provided with a first microprotrusion part (221) at one end close to the driving substrate (100) and one end far away from the driving substrate (100), the light-emitting layer (230) is arranged at one side of the pixel defining layer (220) far away from the driving substrate (100), and the second electrode layer (240) is arranged at one side of the light-emitting layer (230) far away from the driving substrate (100).

Inventors

ZHANG FUSHUANG
LUO HUAN
YUAN HAOJIE
WU SHUANGHONG
ZHANG DACHENG
LI YUHAO
Feng Bingming
SU DONGDONG
CAI QINSHAN
LI XIAONAN
WEN LINGANG
ZOU JIANMING
LI RUQUAN

Assignees

京东方科技集团股份有限公司
云南创视界光电科技有限公司
北京京东方技术开发有限公司

Dates

Publication Date: 20260508
Application Date: 20240905

Claims (20)

A display panel, comprising: A driving substrate including a plurality of pixel circuits; A light emitting device layer disposed on one side of the driving substrate, the light emitting device layer including a first electrode layer, a pixel defining layer, a light emitting layer, and a second electrode layer; The first electrode layer comprises a plurality of first electrode blocks, orthographic projections of different first electrode blocks on the driving substrate are not overlapped, the first electrode blocks are electrically connected with the pixel circuit, the pixel defining layer comprises a plurality of pixel openings, orthographic projections of the pixel openings on the driving substrate fall into orthographic projections of the first electrode blocks on the driving substrate, and the pixel defining layer covers the edge of the first electrode blocks; The pixel defining layer comprises a first slope overlapping the edge of the first electrode block, and at least one of one end of the first slope close to the driving substrate and one end far away from the driving substrate is provided with a first micro-bulge; The light-emitting layer is arranged on one side of the pixel defining layer, which is far away from the driving substrate, and the second electrode layer is arranged on one side of the light-emitting layer, which is far away from the driving substrate.
The display panel of claim 1, wherein, The first microprotrusion part comprises a first sub-bulge part and a second sub-bulge part, the second sub-bulge part is connected to one end of the first slope part far away from the driving substrate, and the first sub-bulge part is connected to one end of the first slope part near the driving substrate; in a first direction, the vertical distance between the protruding vertex of the first sub-protruding part and the lower surface of the first electrode layer is a first distance, the vertical distance between the protruding vertex of the second sub-protruding part and the lower surface of the first electrode layer is a second distance, and the first direction is a direction perpendicular to the plane of the driving substrate; The first distance is less than the second distance.
The display panel of claim 2, wherein, A first sub-groove is formed between the first slope part and the first sub-protrusion part.
The display panel according to claim 3, wherein, The pixel defining layer comprises a first structural part and a second structural part, the first slope part and the first micro-bulge part are connected between the first structural part and the second structural part, and the first structural part, the second structural part, the first sub-groove and the first micro-bulge part are of an integrated structure; The front projection of the first structure part on the driving substrate is not overlapped with the front projection of the first electrode block on the driving plate, and the front projection of the second structure part on the driving substrate is overlapped with the front projection of the first electrode block on the driving substrate; In the first direction, a vertical distance between the side surface of the first structural part, which is far away from the driving substrate, and the lower surface of the first electrode layer is a third distance, a vertical distance between the side surface of the second structural part, which is far away from the driving substrate, and the lower surface of the first electrode layer is a fourth distance, and the third distance is smaller than the fourth distance.
The display panel of claim 4, wherein, The fourth distance is greater than the first distance and the third distance is less than the first distance.
The display panel according to claim 3, wherein, The first sub-groove is connected with the first sub-protruding part near the edge of the notch of the first sub-protruding part, and the first sub-groove is connected with the second sub-protruding part near the edge of the notch of the second sub-protruding part; in the first direction, the vertical distance between the edge of the notch of the first sub-groove, which is close to the first sub-protruding part, and the lower surface of the first electrode layer is a fifth distance, the vertical distance between the edge of the notch of the first sub-groove, which is close to the second sub-protruding part, and the lower surface of the first electrode layer is a sixth distance, and the fifth distance is smaller than the sixth distance.
The display panel of claim 2, wherein, The first electrode block comprises a first conductive layer, a second conductive layer and a third conductive layer which are stacked, wherein the first conductive layer is positioned between the second conductive layer and the driving substrate, and the second conductive layer is positioned between the first conductive layer and the third conductive layer; Orthographic projections of the second conductive layer and the third conductive layer on the driving substrate fall into orthographic projections of the first conductive layer on the driving substrate; the orthographic projection of the first sub-convex part on the driving substrate is not overlapped with the orthographic projection of the third conductive layer on the driving substrate.
The display panel according to claim 3, wherein, A second sub-groove is formed in one side, far away from the driving substrate, of the pixel defining layer; The first sub-groove has a different dimension in the first direction than the second sub-groove; The second sub-grooves are positioned between two adjacent first sub-grooves; The orthographic projection of the second sub-groove on the driving substrate is not overlapped with the orthographic projection of the first electrode block on the driving substrate.
The display panel of claim 8, wherein, The orthographic projection of the first sub-groove on the driving substrate is overlapped with the orthographic projection edge of the first electrode block on the driving substrate; the first sub-groove has a smaller dimension in the first direction than the second sub-groove.
The display panel according to any one of claims 1 to 9, wherein, The pixel defining layer comprises a first defining layer, a second defining layer and a third defining layer which are arranged in a stacked mode, wherein the second defining layer is positioned between the first defining layer and the third defining layer, and the first defining layer is positioned between the driving substrate and the second defining layer; An edge of the second defined layer orthographic projected on the drive substrate surrounds an edge of the third defined layer orthographic projected on the drive substrate; An edge of the third defined layer orthographic projected on the drive substrate surrounds an edge of the first defined layer orthographic projected on the drive substrate.
The display panel of claim 10, wherein, The pixel defining layer is provided with a second groove on the side surface close to the pixel opening, and the notch of the second groove faces the pixel opening; The side surface of the second defining layer, which is close to the pixel opening, is the groove bottom of the second groove, one side of the first defining layer, which is close to the pixel opening, is positioned at a part of the notch of the second groove, and one side of the third defining layer, which is close to the pixel opening, is positioned at a part of the notch of the second groove; the first microprotrusion portion has a bump height less than or equal to the thickness of the second defining layer, or, The height of the first micro-protrusion is smaller than or equal to the dimension of the second groove in a first direction, and the first direction is a direction perpendicular to the plane of the driving substrate.
The display panel according to any one of claims 1 to 9, wherein, A third groove is formed in one side, away from the driving substrate, of the pixel defining layer, the notch of the third groove faces away from the driving substrate, and the third groove is located in an area between the adjacent first electrode blocks.
The display panel of claim 12, wherein, And in the connecting line direction of the adjacent first electrode blocks, the dimension of one end of the third groove far away from the driving substrate is smaller than the dimension of one end of the third groove close to the driving substrate.
The display panel of claim 12, wherein, In the case where the pixel defining layer includes a first sub-groove, a ratio of a groove depth of the third groove in a first direction to a groove depth of the first sub-groove in the first direction is greater than 1; The first direction is a direction perpendicular to the plane of the driving substrate.
The display panel of claim 11, wherein, A second protruding part is arranged on one side of the light-emitting layer far away from the driving substrate, and at least two second protruding parts are arranged in the area between the adjacent first electrode blocks; the orthographic projection of the second protruding part on the driving substrate covers the edge of the orthographic projection of the first electrode block on the driving substrate.
The display panel of claim 15, wherein, A first concave part and a second concave part are arranged on one side, far away from the driving substrate, of the light-emitting layer, and the second convex part is positioned between the first concave part and the second concave part; The second recess is adjacent to the pixel opening relative to the first recess in a direction in which the pixel defining layer points to the pixel opening.
The display panel of claim 16, wherein, The curvature change rate of the second concave portion is larger than that of the first concave portion.
The display panel of claim 16, wherein, A third protruding part is arranged on one side, far away from the driving substrate, of the light-emitting layer, the first concave part is positioned between the second protruding part and the third protruding part, and the protruding height of the third protruding part is smaller than that of the second protruding part; The light-emitting layer comprises a third structural part and a fourth structural part, the second concave part is connected between the fourth structural part and the second convex part, and the third convex part is connected between the first concave part and the third structural part; The orthographic projection of the fourth structural part on the driving substrate falls into the orthographic projection of the pixel opening on the driving substrate, and the orthographic projection of the third structural part on the driving substrate is not overlapped with the orthographic projection of the first electrode block on the driving substrate; In the first direction, a vertical distance between a side surface of the third structural part, which is far from the driving substrate, and the lower surface of the first electrode block is a seventh distance, a vertical distance between a side surface of the fourth structural part, which is far from the driving substrate, and the lower surface of the first electrode block is an eighth distance, and a distance between a side surface of the second protruding part, which is far from the driving substrate, and the first electrode block is a ninth distance; The seventh distance is greater than the eighth distance, the seventh distance is less than the ninth distance, and the eighth distance is less than the ninth distance.
The display panel of claim 12, wherein, A second protruding portion, a first recessed portion and a second recessed portion are arranged on one side, away from the driving substrate, of the light-emitting layer, at least two second protruding portions are arranged in a region between adjacent first electrode blocks, the second protruding portions are located between the first recessed portions and the second recessed portions, and in the direction that the pixel defining layer points to the pixel opening, the second recessed portions are close to the pixel opening relative to the first recessed portions; The orthographic projection of the second protruding part on the driving substrate covers the orthographic projection edge of the first electrode block on the driving substrate; The curvature change rate of the first concave portion is greater than that of the second concave portion.
The display panel of claim 16, wherein, A third protruding portion and a third recessed portion are arranged on one side, away from the driving substrate, of the light-emitting layer, the third recessed portion is connected between the second protruding portion and the third protruding portion, the protruding height of the third protruding portion is smaller than that of the second protruding portion, and the curvature change rate of the second recessed portion is larger than that of the third recessed portion; The light-emitting layer comprises a third structural part and a fourth structural part, the second concave part is connected between the fourth structural part and the second convex part, and the first concave part is connected between the third convex part and the third structural part; The orthographic projection of the fourth structural part on the driving substrate falls into the orthographic projection of the pixel opening on the driving substrate, and the orthographic projection of the third structural part on the driving substrate is not overlapped with the orthographic projection of the first electrode block on the driving substrate; In the first direction, a vertical distance between a side surface of the third structural part, which is far from the driving substrate, and the lower surface of the first electrode block is a seventh distance, a vertical distance between a side surface of the fourth structural part, which is far from the driving substrate, and the lower surface of the first electrode block is an eighth distance, a distance between a side surface of the second protruding part, which is far from the driving substrate, and the first electrode block is a ninth distance, and a distance between a side surface of the third protruding part, which is far from the driving substrate, and the first electrode block is a tenth distance; the eighth distance is greater than the seventh distance, the tenth distance is greater than the eighth distance, and the ninth distance is greater than the tenth distance.

Description

Display panel and display device Technical Field The present disclosure relates to a display panel and a display device, and more particularly, to a display panel and a display device. Background Currently, with the continuous development of display technology, micro-OLED (Micro organic light emitting diode) display devices are gradually entering the consumer market. Micro-OLED has advantages such as small and resolution ratio height, can integrate more circuits, and then realizes the lightweight, therefore has wide luminous prospect. In the existing product structure of Micro-OLED, the first electrode layer is subjected to a patterning process to obtain a block structure, so that independent driving of the light emitting devices is realized, a spacing area is arranged between anodes of different light emitting devices, and a groove structure is formed between adjacent anodes. The difference in the film layer section formed at the edge of the anode easily causes unevenness of the film layer above the anode, and even cathode puncture occurs, resulting in short circuit between the cathode and the anode, resulting in poor display. Disclosure of Invention In a first aspect of the present disclosure, there is provided a display panel including: A driving substrate including a plurality of pixel circuits; A light emitting device layer disposed on one side of the driving substrate, the light emitting device layer including a first electrode layer, a pixel defining layer, a light emitting layer, and a second electrode layer; The first electrode layer comprises a plurality of first electrode blocks, orthographic projections of different first electrode blocks on the driving substrate are not overlapped, the first electrode blocks are electrically connected with the pixel circuit, the pixel defining layer comprises a plurality of pixel openings, orthographic projections of the pixel openings on the driving substrate fall into orthographic projections of the first electrode blocks on the driving substrate, and the pixel defining layer covers the edge of the first electrode blocks; The pixel defining layer comprises a first slope overlapping the edge of the first electrode block, and at least one of one end of the first slope close to the driving substrate and one end far away from the driving substrate is provided with a first micro-bulge; The light-emitting layer is arranged on one side of the pixel defining layer, which is far away from the driving substrate, and the second electrode layer is arranged on one side of the light-emitting layer, which is far away from the driving substrate. In some embodiments, the first microprotrusions include a first sub-embossment and a second sub-embossment, the second sub-embossment being connected to an end of the first ramp distal to the drive substrate, the first sub-embossment being connected to an end of the first ramp proximal to the drive substrate; in a first direction, the vertical distance between the protruding vertex of the first sub-protruding part and the lower surface of the first electrode layer is a first distance, the vertical distance between the protruding vertex of the second sub-protruding part and the lower surface of the first electrode layer is a second distance, and the first direction is a direction perpendicular to the plane of the driving substrate; The first distance is less than the second distance. In some embodiments, a first sub-groove is formed between the first ramp and the first sub-protrusion. In some embodiments, the pixel defining layer includes a first structure portion and a second structure portion, the first slope portion and the first microprotrusion portion each connected between the first structure portion and the second structure portion, the first structure portion, the second structure portion, the first sub-groove, and the first microprotrusion portion being a unitary structure; The front projection of the first structure part on the driving substrate is not overlapped with the front projection of the first electrode block on the driving plate, and the front projection of the second structure part on the driving substrate is overlapped with the front projection of the first electrode block on the driving substrate; In the first direction, a vertical distance between the side surface of the first structural part, which is far away from the driving substrate, and the lower surface of the first electrode layer is a third distance, a vertical distance between the side surface of the second structural part, which is far away from the driving substrate, and the lower surface of the first electrode layer is a fourth distance, and the third distance is smaller than the fourth distance. In some embodiments, the fourth distance is greater than the first distance and the third distance is less than the first distance. In some embodiments, the first sub-groove is connected to the first sub-protrusion near a notch edge of the first sub-protrus