CN-115188788-B - Display panel and display device

Abstract

The application provides a display panel and a display device, wherein the display panel comprises a first display area and a second display area, the display panel comprises a substrate, a first light-emitting unit and a second light-emitting unit, the first light-emitting unit is arranged on one side of the substrate in the first display area, the first light-emitting unit comprises m light-emitting layers, m is an integer greater than or equal to 2, the m light-emitting units comprise a first light-emitting layer and a second light-emitting layer, and the orthographic projection of the first light-emitting layer on the substrate and the orthographic projection of the second light-emitting layer on the substrate at least partially overlap. The second light-emitting unit is arranged in the second display area and arranged on one side of the substrate, and comprises n light-emitting layers, wherein n is an integer greater than or equal to 1. Wherein the effective light emitting area of the first light emitting unit is different from the effective light emitting area of the second light emitting unit. The embodiment of the application can improve the brightness uniformity of different areas and the display effect.

Inventors

• CAI YU
• WANG MIAO

Assignees

• 武汉天马微电子有限公司

Dates

Publication Date

20260505

Application Date

20220629

Claims (18)

1. 1. A display panel comprising a first display region and a second display region, the first display region having a transmittance greater than the second display region; A substrate; The first light-emitting unit is arranged on one side of the substrate in the first display area, the first light-emitting unit comprises m light-emitting layers, m is an integer greater than or equal to 2, the m light-emitting layers comprise a first light-emitting layer and a second light-emitting layer, and the orthographic projection of the first light-emitting layer on the substrate and the orthographic projection of the second light-emitting layer on the substrate at least partially overlap; The second light-emitting unit is arranged on one side of the substrate in the second display area and comprises n light-emitting layers, wherein n is an integer greater than or equal to 1; The effective light-emitting area of the first light-emitting unit is different from that of the second light-emitting unit, the effective light-emitting area is the orthographic projection area of the first light-emitting unit or the second light-emitting unit on the substrate, or the effective light-emitting area is the sum of orthographic projection areas of all light-emitting layers in the first light-emitting unit or the second light-emitting unit on the substrate, the density of the first light-emitting unit is smaller than that of the second light-emitting unit, or the size of the first light-emitting unit is smaller than that of the second light-emitting unit; The display panel further comprises a pixel definition layer arranged on one side of the substrate, the pixel definition layer is made of transparent materials, the pixel definition layer comprises a first opening penetrating along the thickness direction of the substrate, the first light-emitting unit is at least partially located in the first opening, at least part of the first light-emitting layer is located outside the first opening, the second light-emitting layer is located in the first opening, and at least part of the area of the front projection of the first light-emitting layer on the substrate is not overlapped with the front projection of the second light-emitting layer on the substrate.
2. 2. The display panel according to claim 1, wherein the number of layers m of the light emitting layer included in the first light emitting unit and the number of layers n of the light emitting layer included in the second light emitting unit satisfy a relation of m > n.
3. 3. The display panel according to claim 2, wherein the transmittance of the first display region is larger than the transmittance of the second display region, the light emission colors of the first light emitting units and the second light emitting units are the same, a minimum distance between two adjacent first light emitting units is D1 in the first display region, and a minimum distance between two adjacent second light emitting units is D2 in the second display region; Wherein D1-D2>0.
4. 4. The display panel of claim 2, wherein an orthographic projection area of the first light emitting unit on the substrate is smaller than an orthographic projection area of the second light emitting unit on the substrate.
5. 5. The display panel of claim 4, wherein a sum of forward projection areas of light emitting areas of the light emitting layers in the first light emitting unit on the substrate is greater than a sum of forward projection areas of the light emitting layers in the second light emitting unit on the substrate.
6. 6. The display panel of claim 2, wherein a front projection area of the first light emitting unit on the substrate is not smaller than a front projection area of the second light emitting unit on the substrate; The density of the first light emitting units in the first display area is less than the density of the second light emitting units in the second display area.
7. 7. The display panel of claim 1, wherein n is an integer greater than or equal to 2, wherein the n light-emitting layers include a third light-emitting layer and a fourth light-emitting layer, wherein a front projection of the third light-emitting layer on the substrate at least partially overlaps a front projection of the fourth light-emitting layer on the substrate, and wherein a front projection area of the third light-emitting layer on the substrate is greater than a front projection area of the fourth light-emitting layer on the substrate.
8. 8. The display panel of claim 7, wherein the fourth light emitting layer is located on a side of the third light emitting layer facing away from the substrate.
9. 9. The display panel according to claim 1, wherein the transmittance of the first display region is greater than the transmittance of the second display region, the m light-emitting layers further include a fifth light-emitting layer, at least the light-emitting color of the first light-emitting layer in the first light-emitting unit is red, the light-emitting color of the second light-emitting layer is green, and the light-emitting color of the fifth light-emitting layer is blue; the front projection area of the fifth light-emitting layer on the substrate is larger than the front projection area of the first light-emitting layer on the substrate, and the front projection area of the first light-emitting layer on the substrate is larger than the front projection area of the second light-emitting layer on the substrate.
10. 10. The display panel according to claim 1, further comprising a third light emitting unit located within the second display region, the third light emitting unit comprising i light emitting layers, i being an integer greater than or equal to 1; wherein i is less than or equal to n.
11. 11. The display panel of claim 10, wherein the third light emitting unit is configured to emit blue light.
12. 12. The display panel of claim 1, wherein the second light emitting layer is located on a side of the first light emitting layer facing away from the substrate, and wherein the second light emitting layer is covered by the first light emitting layer in orthographic projection of the substrate.
13. 13. The display panel of claim 1, wherein the first light emitting unit further comprises a first connection layer disposed between adjacent light emitting layers, and the second light emitting unit further comprises a second connection layer disposed between adjacent light emitting layers; the first connecting layer comprises a first doped layer and a second doped layer which are stacked, and the first doped layer and the second doped layer are respectively used for transmitting holes or electrons into two adjacent light-emitting layers in the first light-emitting unit; The second connection layer comprises a third doped layer and a fourth doped layer which are stacked, and the third doped layer and the fourth doped layer are respectively used for transmitting holes or electrons into two adjacent light-emitting layers in the second light-emitting unit.
14. 14. The display panel according to claim 13, wherein at least one of the third doped layer and the fourth doped layer in at least part of the second connection layer has a through hole penetrating in the thickness direction of the substrate, and an orthographic projection of the through hole at the substrate at least partially overlaps an orthographic projection of an adjacent light emitting layer at the substrate.
15. 15. The display panel according to claim 1, further comprising a first barrier rib provided on an outer peripheral side of the first light emitting unit, and a second barrier rib provided on an outer peripheral side of the second light emitting unit.
16. 16. The display panel of claim 15, wherein the number of first barrier ribs is smaller than the number of second barrier ribs, and/or, The orthographic projection length of the first barrier column on the substrate is smaller than that of the second barrier column on the substrate.
17. 17. The display panel of claim 1, wherein at least a portion of the light emitting layer in the first light emitting unit is co-layer with at least a portion of the light emitting layer in the second light emitting unit.
18. 18. A display device comprising the display panel according to any one of claims 1 to 17.

Description

Display panel and display device Technical Field The present application relates to the field of display devices, and in particular, to a display panel and a display device. Background With the development of the technology level, organic light emitting display devices are increasingly popular and widely used. The organic light-emitting display device has the advantages of self-luminescence, wide viewing angle, high contrast, short response time and the like, and has good prospect. However, in the organic display device, the structures in different regions are not the same, and thus the light emission effect is likely to be deviated, and the luminance is not uniform. Disclosure of Invention The embodiment of the application provides a display panel and a display device, which can improve the display uniformity of different areas. In a first aspect, an embodiment of the present application provides a display panel, including a first display area and a second display area, where the display panel includes a substrate, a first light emitting unit and a second light emitting unit, the first light emitting unit is disposed on one side of the substrate in the first display area, the first light emitting unit includes m light emitting layers, m is an integer greater than or equal to 2, and the m light emitting units include a first light emitting layer and a second light emitting layer, where a front projection of the first light emitting layer on the substrate and a front projection of the second light emitting layer on the substrate at least partially overlap. The second light-emitting unit is arranged in the second display area and arranged on one side of the substrate, and comprises n light-emitting layers, wherein n is an integer greater than or equal to 1. Wherein the effective light emitting area of the first light emitting unit is different from the effective light emitting area of the second light emitting unit. The effective light emitting area is the orthographic projection area of the first light emitting unit or the second light emitting unit on the substrate, or the effective light emitting area is the sum of the orthographic projection areas of the light emitting layers in the first light emitting unit or the second light emitting unit on the substrate. In a second aspect, an embodiment of the present application provides a display device including a display panel in any one of the foregoing embodiments. The embodiment of the application provides a display panel and a display device, wherein a first light-emitting unit is arranged in a first display area, a second light-emitting unit is arranged in a second display area, and the effective light-emitting areas of the first light-emitting unit and the second light-emitting unit are set to be different, so that the brightness of the first display area and the second display area can be adjusted, the brightness uniformity of different areas is improved, and the display effect is improved. Drawings In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are needed to be used in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort. Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application; FIG. 2 is an enlarged schematic view of the area Q in FIG. 1; FIG. 3 is a schematic cross-sectional view of A-A of FIG. 2; FIG. 4 is an enlarged schematic view of the first light emitting unit of FIG. 3; Fig. 5 is an enlarged schematic view of the area P in fig. 1; FIG. 6 is a schematic cross-sectional view of B-B in FIG. 5; Fig. 7 is an enlarged schematic view of the second light emitting unit of fig. 6; Fig. 8 is a schematic top view of a first light emitting unit in a display panel according to an embodiment of the present application; FIG. 9 is a schematic cross-sectional view of the structure C-C of FIG. 8; FIG. 10 is a schematic cross-sectional view of B-B in a display panel according to an embodiment of the present application; FIG. 11 is a simplified schematic illustration of the structure shown in FIG. 10; fig. 12 is a schematic cross-sectional view of a second light emitting unit in a display panel according to an embodiment of the present application; fig. 13 is a simplified schematic structural diagram of a second light emitting unit and a third light emitting unit in a further display panel according to an embodiment of the present application; fig. 14 is an enlarged schematic view of a region Q in a display panel according to an embodiment of the present application; Fig. 15 is an enlarged schematic view of a region P in a display panel according to another embodiment of the present application; FIG. 16 is a schematic cross-sectional view of D-D in FIG. 14; Fig. 17 is a schematic structural