CN112864207B

CN112864207B - Display panel and display device

Info

Publication number: CN112864207B
Application number: CN202110082167.7A
Authority: CN
Inventors: 逄辉; 李梦真; 刘彬; 姚纯亮; 赵伟
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2022-10-21
Anticipated expiration: 2041-01-21
Also published as: CN112864207A

Abstract

The application provides a display panel and a display device. The display panel comprises a substrate, a pixel defining layer, a plurality of first light-emitting functional layers and a plurality of second light-emitting functional layers. The pixel definition layer is positioned on one side of the substrate. The pixel definition layer is provided with a plurality of pixel openings which are arranged at intervals, and a bulge is formed between every two adjacent pixel openings. Each first light-emitting functional layer covers one pixel opening, and the first light-emitting functional layer extends to one side, away from the substrate, of the bulge adjacent to the pixel opening. Each second light-emitting functional layer covers one pixel opening, and the second light-emitting functional layer extends to one side, away from the substrate, of the bulge adjacent to the pixel opening. And at least part of adjacent orthographic projections of the first light-emitting functional layer and the second light-emitting functional layer on the bulges are overlapped.

Description

Display panel and display device

Technical Field

The present application relates to the field of display device technologies, and in particular, to a display panel and a display device.

Background

An Organic Light Emitting Diode (OLED) Display panel has advantages of high image quality, thin body, and power saving, and is widely applied to various consumer electronics products such as mobile phones, televisions, and personal digital assistants.

When each sub-pixel in the display panel is lighted, because a voltage difference exists between a luminous area and a non-luminous area between adjacent sub-pixels, a driving current can pass through the non-luminous area, and therefore the display effect is influenced.

Disclosure of Invention

Therefore, it is necessary to provide a display panel and a display device, which solve the problem that when the conventional display panel is turned on, a driving current can pass through a non-light-emitting region due to a voltage difference between the light-emitting region and a non-light-emitting region between adjacent sub-pixels, thereby affecting the display effect.

A display panel, comprising:

a substrate;

the pixel definition layer is positioned on one side of the substrate, is provided with a plurality of pixel openings which are arranged at intervals, and forms a bulge between every two adjacent pixel openings;

a plurality of first light-emitting functional layers, each of which covers one of the pixel openings and extends to a side of the protrusion adjacent to the pixel opening, the side being away from the substrate;

a plurality of second light-emitting functional layers, each of which covers one of the pixel openings and extends to a side of the protrusion adjacent to the pixel opening, which is away from the substrate;

and at least part of adjacent orthographic projections of the first light-emitting functional layer and the second light-emitting functional layer on the bulges are overlapped.

In one embodiment, the first light-emitting functional layer includes first light-emitting layers, each of the first light-emitting layers covers one of the pixel openings and extends to a side of the protrusion adjacent to the pixel opening, the side being away from the substrate;

the second light-emitting functional layer comprises second light-emitting layers, each second light-emitting layer covers one pixel opening and extends to one side, away from the substrate, of the bulge adjacent to the pixel opening;

the adjacent first light-emitting layer and the second light-emitting layer at least partially overlap in an orthographic projection of the protrusion.

In one embodiment, the first light-emitting functional layer further includes first compensation layers disposed on a side of the first light-emitting layer close to the protrusions, each of the first compensation layers covering one of the pixel openings and extending to a side of the protrusion adjacent to the pixel opening away from the substrate;

the second light-emitting functional layer further comprises second compensation layers, the second compensation layers are arranged on one sides, close to the bulges, of the second light-emitting layers, each second compensation layer covers one pixel opening and extends to one side, away from the substrate, of the bulge adjacent to the pixel opening;

the adjacent first compensation layer and the second compensation layer at least partially overlap in the orthographic projection of the protrusion.

In one embodiment, the second compensation layer is disposed between the first light-emitting layer and the first compensation layer on a side of the protrusion away from the substrate.

In one embodiment, the first light emitting function layer comprises first compensation layers, each first compensation layer covers one pixel opening and extends to one side, away from the substrate, of the protrusion adjacent to the pixel opening;

the second light-emitting functional layer comprises second compensation layers, each second compensation layer covers one pixel opening and extends to one side, away from the substrate, of the bulge adjacent to the pixel opening;

In one embodiment, the projection has a first surface facing away from the substrate, and the area of the overlapped part of the first light-emitting function layer and the second light-emitting function layer is smaller than or equal to the area of the first surface;

preferably, an area of an overlapping portion of the first light emission functional layer and the second light emission functional layer is 50% to 100% of an area of the first surface;

preferably, a distance between the overlapping portion of the first light emission functional layer and the second light emission functional layer and the pixel opening adjacent to the projection is 0% to 40% of a length of the first surface.

In one embodiment, the display panel further includes:

a plurality of third light-emitting functional layers, each of which covers one of the pixel openings and extends to a side of the protrusion adjacent to the pixel opening, the side being away from the substrate;

and at least part of orthographic projections of the adjacent first light-emitting functional layer, the second light-emitting functional layer and the third light-emitting functional layer on the bulges are overlapped.

In one embodiment, the third light-emitting functional layer includes third light-emitting layers, each of which covers one of the pixel openings and extends to a side of the protrusion adjacent to the pixel opening, away from the substrate;

the adjacent first light-emitting functional layer, the second light-emitting functional layer and the third light-emitting layer are at least partially overlapped in the orthographic projection of the projection.

In one embodiment, the third light-emitting functional layer further includes a third compensation layer covering one of the pixel openings, the third compensation layer is disposed on a side of the third light-emitting layer close to the protrusion, and each of the third compensation layers covers one of the pixel openings and extends to a side of the protrusion adjacent to the pixel opening, away from the substrate;

the adjacent first light-emitting functional layer, the second light-emitting functional layer and the third compensation layer are at least partially overlapped in the orthographic projection of the projection.

A display device comprising the display panel of any one of the above embodiments.

In the display panel and the display device, the pixel definition layer is provided with the plurality of pixel openings which are arranged at intervals, and the bulges are formed between the adjacent pixel openings. Each first light-emitting functional layer covers one pixel opening, and the first light-emitting functional layer extends to one side, away from the substrate, of the bulge adjacent to the pixel opening. Each second light-emitting functional layer covers one pixel opening, and the second light-emitting functional layer extends to one side, away from the substrate, of the bulge adjacent to the pixel opening. And the adjacent first light-emitting functional layer and the second light-emitting functional layer are at least partially overlapped in the orthographic projection of the bulge, so that the thickness of the film layer on the top of the bulge is increased. The increased thickness of the film layer increases the resistance of the film layer at the top of the bump. Since the pixel opening is disposed between the adjacent protrusions, a current flowing to the pixel opening is increased. The current flowing to the pixel openings is increased, so that the leakage loss flowing to the protrusions between the adjacent pixel openings can be reduced, and the luminous efficiency of the display panel is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a top view of a display panel according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a portion of the layer structure of FIG. 1 taken along section A1-A1 according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a portion of the layer structure of FIG. 1 taken along line A1-A1 in accordance with another embodiment of the present application;

FIG. 4 is a schematic view of a portion of the layer structure of FIG. 1 taken along line A1-A1 in accordance with another embodiment of the present application;

FIG. 5 is a schematic view of a portion of the layer structure of FIG. 1 taken along section A1-A1 according to another embodiment of the present application;

FIG. 6 is a schematic illustration of a portion of the layer structure of FIG. 1 taken along section A1-A1 in accordance with another embodiment of the present application;

FIG. 7 is a schematic illustration of a portion of the layer structure of FIG. 1 taken along section A2-A2 in accordance with an embodiment of the present application;

FIG. 8 is a schematic illustration of a portion of the layer structure of FIG. 1 taken along section A2-A2 in accordance with another embodiment of the present application;

FIG. 9 is a schematic illustration of a portion of the layer structure of FIG. 1 taken along section A2-A2 in accordance with another embodiment of the present application;

FIG. 10 is a schematic illustration of a portion of the layer structure of FIG. 1 taken along section A2-A2 in accordance with another embodiment of the present application;

fig. 11 is a schematic diagram illustrating red light emitting efficiency of a display panel according to an embodiment of the present disclosure;

fig. 12 is a schematic diagram illustrating green light emission efficiency of a display panel according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram illustrating a blue light emitting efficiency of a display panel according to an embodiment of the present disclosure;

fig. 14 is a process flow diagram of a method for manufacturing a display panel according to an embodiment of the present disclosure.

Description of reference numerals:

a display panel 10; a substrate 101; an anode layer 102; a first charge carrier layer 103; a second charge carrier layer 104; a pixel light emitting region 105; a pixel spacer region 106; a cathode layer 107; a pixel defining layer 100; a pixel opening 110; a protrusion 120; a display device 200; a first light emitting functional layer 200; a first light-emitting layer 210; a first compensation layer 220; a second light-emitting functional layer 300; a second light emitting layer 310; a second compensation layer 320; a third light-emitting functional layer 400; a third light emitting layer 410; a third compensation layer 420.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

The numbering scheme used herein for the components as such, e.g., "first", "second", etc., is used for the purpose of describing the objects only, and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The organic light emitting diode display panel has advantages of high image quality, power saving, thin body, and wide application range, and is widely applied to various consumer electronics products such as mobile phones, televisions, personal digital assistants, and the like. When each sub-pixel in the display panel is lighted, the driving current can leak longitudinally (i.e. the light emitting direction of the display panel) through the film layer of the non-light emitting region due to the fact that the non-light emitting region between the light emitting region and the adjacent sub-pixel has a voltage difference. The driving current leaks electricity longitudinally, so that the luminous current for driving the OLED screen body to emit light is reduced, and the luminous efficiency of the OLED screen body is low.

In order to solve the above problem, embodiments of the present application provide a display panel and a display panel. For better understanding of the present application, the display panel and the display panel of the embodiment of the present application are described in detail below with reference to fig. 1 to 14.

Referring to fig. 1 and fig. 2, an embodiment of the present application provides a display panel 10. The display panel 10 includes a substrate 101, a pixel defining layer 100, a plurality of first light emitting function layers 200, and a plurality of second light emitting function layers 300. The pixel defining layer 100 is located on one side of the substrate 101. The pixel defining layer 100 is formed with a plurality of pixel openings 110 disposed at intervals. The protrusions 120 are formed between adjacent pixel openings 110.

The pixel openings 110 may be arranged in a matrix. The pixel opening 110 corresponds to a light emitting sub-pixel. A plurality of the pixel openings 110 may form a pixel light emitting region 105. A plurality of the protrusions 120 may form the pixel space region 106. It is understood that the pixel definition layer 100 may be a grid structure laid out flat on a substrate surface. The grid plane structure is provided with a plurality of grids. One for each pixel opening 110. The number of the protrusions 120 is plural, and the protrusions are connected with each other to form the lattice structure.

Each of the first light emitting function layers 200 covers one of the pixel openings 110, and the first light emitting function layer 200 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is away from the substrate 101. Each of the second light-emitting functional layers 300 covers one of the pixel openings 110, and the second light-emitting functional layers 300 extend to a side of the protrusion 120 adjacent to the pixel opening 110, which is far from the substrate 101. The adjacent first light-emitting functional layer 200 and the second light-emitting functional layer 300 at least partially overlap in the orthographic projection of the projection 120.

The first light-emitting functional layer 200 and the second light-emitting functional layer 300 correspond to sub-pixels in the display panel 10. The emission colors of the sub-pixels corresponding to the first emission function layer 200 and the second emission function layer 300 may be different. It is understood that one of the pixel openings 110 can be covered only by the first light emission functional layer 200 or the second light emission functional layer 300. If the first light emission functional layer 200 is used for red light emission, the second light emission functional layer 300 may be used for blue or green light emission. Likewise, if the first light emitting function layer 200 is used for emitting green light, the second light emitting function layer 300 may be used for emitting blue or red light. In one embodiment, the adjacent first light emitting function layer 200 and the second light emitting function layer 300 may belong to the same pixel unit.

The first light emitting function layer 200 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is far from the substrate 101. That is, the orthographic projection of the first light-emitting functional layer 200 on the protrusions 120 may at least partially cover the surface of the protrusions 120 away from the substrate 101. That is, the first luminescence function layer 200 may at least partially cover the top of the protrusions 120. At least partially covering the top of the protrusion 120 means that the top of the protrusion 120 is at least partially covered. That is, at least a part of the top of the protrusions 120 is covered with the first luminescent functional layer 200. It is understood that the top of the protrusion 120 refers to a portion of the protrusion 120 above the surface away from the substrate 101, and does not particularly refer to the surface of the protrusion 120 away from the substrate 101.

The second light-emitting functional layer 300 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is far from the substrate 101. That is, the orthographic projection of the second light-emitting functional layer 300 on the protrusion 120 may at least partially cover the surface of the protrusion 120 away from the substrate 101. That is, the second luminescent functional layer 300 may at least partially cover the top of the protrusions 120.

The adjacent first light-emitting functional layer 200 and the second light-emitting functional layer 300 at least partially overlap in the orthographic projection of the projection 120. That is, the orthographic projection of the first light-emitting functional layer 200 on the projection 120 at least partially overlaps with the orthographic projection of the second light-emitting functional layer 300 on the projection 120. This increases the number of stacked layers of the film layer on the side of the protrusion 120 away from the substrate 101 in the pixel spacer 106. The thickness of the pixel spacer region 106 is increased, thereby increasing the resistance value of the pixel spacer region 106. After the resistance of the pixel spacer 106 is increased, the current is not easy to pass through the light emitting function layer in the pixel spacer 106. Therefore, when the display panel 10 operates, the display panel 10 has high light emitting efficiency without changing the magnitude of the driving voltage.

Specifically, as shown in the formula: r = ρ L/S. Wherein R is a resistance of the top film layer of the protrusion 120.ρ is the resistivity of the top film layer of the protrusion 120. L is the thickness of the top film layer of the protrusion 120. S is the cross-sectional area of the top film layer of the protrusion 120. Since the resistivity ρ of the top film layer of the bump 120 is fixed, the cross-sectional area S is also fixed. When the thickness of the top film layer of the protrusion 120 is increased, the resistance value of the top film layer of the protrusion 120 is increased, thereby increasing the resistance value of the pixel space region 106. The top film layer of the protrusions 120 refers to a film layer on a side of each of the protrusions 120 away from the substrate 101 in the pixel space area 106.

Since the driving voltage of the display panel 10 is fixed, when the resistance value of the pixel spacers 106 is increased, the current flowing to the tops of the pixel spacers 106 is reduced, so that the vertical leakage of the pixel spacers 106 can be prevented. I.e., a decrease in current flowing to the top of the pixel spacer region 106, may cause an increase in current flowing to the pixel light emitting region 105. Therefore, when the display panel 10 operates, the display panel 10 has high luminous efficiency without changing the magnitude of the driving voltage. Wherein, the driving current of the display panel 10 is the sum of the light emitting current of the pixel light emitting region 105 and the loss current of the pixel spacing region 106.

Therefore, in the display panel 10 provided in the embodiment of the present application, the orthographic projections of the adjacent first light-emitting functional layer 100 and the second light-emitting functional layer 200 on the protrusions 120 at least partially overlap, so that the thickness of the film layer on the tops of the protrusions 120 can be increased. The thickness of the pixel spacer 106 corresponding to each protrusion 120 is increased, thereby increasing the resistance value of the pixel spacer 106. After the resistance of the pixel spacer 106 is increased, the current is not easy to pass through the light emitting function layer in the pixel spacer 106. Therefore, when the display panel 10 operates, the display panel 10 has high luminous efficiency without changing the magnitude of the driving voltage.

The substrate 101 may be a Thin Film Transistor (TFT) array substrate. The substrate 101 may include a substrate, and a gate layer, an active layer, an etch stopper layer, a passivation layer, a planarization layer, and the like, which are stacked on the substrate. The active stack is disposed on a side of the gate layer away from the substrate. The etching barrier layer is arranged on one side, far away from the grid layer, of the active layer in a stacking mode. The passivation layer is arranged on one side, far away from the active layer, of the etching barrier layer in a stacked mode. The planarization layer is arranged on one side, far away from the etching barrier layer, of the passivation layer in a stacked mode.

It is understood that the display panel 10 further includes a plurality of anode layers 102 disposed at intervals on the substrate 101, and a first carrier layer 103 covering the anode layers 102.

A plurality of the anode layers 102 are disposed at intervals on the substrate 101. The pixel defining layer 100 covers the substrate 101, and forms the plurality of pixel openings 110 and the protrusions 120. Each of the anode layers 102 is disposed corresponding to one of the pixel openings 110. The anode layer 102 is located at the bottom of the pixel opening 110. The first charge carrier layer 103 covers the pixel defining layer 100. The first charge carrier layer 103 covers the anode layer 102, the pixel opening 110, and the protrusion 120. The first light-emitting functional layer 200 and the second light-emitting functional layer 300 are overlapped on the partial surface of the first charge carrier layer 103 on the top of the protrusion 120.

The anode layers 102 disposed at intervals may be deposited on the surface of the substrate 101 by evaporation. The pixel defining layer 100 is stacked on a side of the anode layer 102 away from the substrate 101. The pixel defining layer 100 may be deposited on the surface of the anode layer 102 by evaporation. Wherein each of the pixel openings 110 corresponds to one of the anode layers 102. I.e. the protrusions 120 are arranged between adjacent anode layers 102. The pixel defining layer 100 may be a phenol-formaldehyde polymer or polyvinyl alcohol.

A first charge carrier layer 103 may be disposed on a side of the pixel defining layer 100 away from the anode layer 102. The first carrier layer 103 includes a hole injection layer and a hole transport layer. The first charge carrier layer 103 may be deposited on the surface of the pixel defining layer 100 by evaporation. The first light emitting function layer 200 may be stacked on a side of the first charge carrier layer 103 away from the pixel defining layer 100. Meanwhile, the second light-emitting function layer 300 may be further stacked on the first charge carrier layer 103 on the side away from the pixel defining layer 100. The first light-emitting functional layer 200 or the second light-emitting functional layer 300 may be deposited on the surface of the first carrier layer 103 by evaporation, and the first light-emitting functional layer 200 or the second light-emitting functional layer 300 covers different pixel openings 110. Similarly, a second carrier layer 104 and a cathode layer may be sequentially stacked on the first light-emitting functional layer 200 and the second light-emitting functional layer 300 on the side away from the first carrier layer 103. The second charge carrier layer 104 may include an electron transport layer and an electron injection layer.

When a voltage is applied between the cathode layer and the anode layer 102 of the display panel 10, the driving current may be transmitted from the anode layer 102 to the corresponding first light-emitting functional layer 200 or the second light-emitting functional layer 300. In this case, the first charge carrier layer 103 corresponds to a conductor, and the driving current can be transmitted (i.e., a loss current is generated) along the first charge carrier layer 103 to the pixel space region 106 and transmitted along a light emitting direction (i.e., a longitudinal direction) of the display panel 10. The thickness of the top film layer of the protrusion 120 in the pixel spacer 106 is increased, which results in an increase in the resistance value of the top film layer of the protrusion 120. The resistance value of the top film layer of the protrusion 120 is increased so that the loss current transmitted in the longitudinal direction of the pixel spacer 106 is reduced. Thus, the leakage of electricity in the non-light-emitting region can be avoided, and the light-emitting efficiency of the display panel 10 can be improved.

Referring to fig. 3, in one embodiment, the first light emitting function layer 200 includes a first light emitting layer 210. The first light emitting layer 210 covers the pixel opening 110, and the first light emitting layer 210 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is far away from the substrate 101. The second light emitting function layer 300 includes a second light emitting layer 310. The second light emitting layer 310 covers the pixel opening 110, and the second light emitting layer 310 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is far away from the substrate 101. The adjacent first light emitting layer 210 and the second light emitting layer 310 at least partially overlap in a forward projection of the protrusion 120. That is, by overlapping the adjacent first light emitting layer 210 and the second light emitting layer 310 at the protrusion 120, it is achieved that the orthographic projection of the adjacent first light emitting function layer 200 and the second light emitting function layer 300 at the protrusion 120 at least partially overlap. The first light emitting layer 210 is selected from, but not limited to, conventional various organic electroluminescent materials. The second light emitting layer 310 is selected from, but not limited to, conventional organic electroluminescent materials. In one embodiment, the organic electroluminescent material may be 8-hydroxyquinoline aluminum (Alq 3), DPVBi, and the like.

It is understood that the first light emitting layer 210 and the second light emitting layer 310 may emit light of different colors. If the first light emitting layer 210 is used for red light emission, the second light emitting layer 310 may be used for blue or green light emission. Similarly, if the first light emitting layer 210 is used to emit green light, the second light emitting layer 310 may be used to emit blue or red light.

In this embodiment, at least a partial overlap of the orthographic projections of the protrusions 120 of the adjacent first light-emitting layer 210 and the second light-emitting layer 310 may increase the thickness of the film layer on the tops of the protrusions 120. The increased thickness of the film layer on top of the bumps 120 may increase the resistance of the film layer on top of the bumps 120. Accordingly, the resistance of the pixel space region 106 also increases. After the resistance of the pixel space region 106 is increased, the current flowing to the top of the pixel space region 106 is decreased, so that the longitudinal leakage of the pixel space region 106 can be prevented.

Referring to fig. 4, in an embodiment, the first light emitting function layer 200 further includes a first compensation layer 220 stacked with the first light emitting layer 210. The first compensation layer 220 covers one of the pixel openings 110. The first compensation layer 220 is disposed closer to the protrusion 120 than the first light emitting layer 210. The first compensation layer 220 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is far away from the substrate 101.

The second light emitting function layer 300 further includes a second compensation layer 320 laminated with the second light emitting layer 310. The second compensation layer 320 covers one of the pixel openings 110. The second compensation layer 320 is closer to the protrusion 120 than the second light emitting layer 310. The second compensation layer 320 extends to a side of the protrusion 120 away from the substrate 101 adjacent to the pixel opening 110. The adjacent first compensation layer 220 and the second compensation layer 320 at least partially overlap in the orthographic projection of the protrusion 120.

The first light emitting layer 210 is stacked on the first compensation layer 220 at a side away from the substrate 101. The first compensation layer 220 can improve the light emitting efficiency of the first light emitting layer 210, so as to improve the display quality of the display panel 10. It is understood that the material of the first compensation layer 220 may be an organic material. For example, the organic material may be a triarylamine derivative, a spirobifluorene derivative, a carbazole derivative, or the like. The first compensation layer 220 using an organic material may reduce a hole injection barrier, resulting in higher utilization efficiency of electrons and holes in the first light emitting layer 210.

The second light emitting layer 310 is stacked on the second compensation layer 320 at a side away from the substrate 101. The second compensation layer 320 can improve the light emitting efficiency of the second light emitting layer 310, thereby improving the display quality of the display panel 10. It is understood that the material of the second compensation layer 320 may be an organic material. For example, the organic material may be a triarylamine derivative, a spirobifluorene derivative, a carbazole derivative, or the like. The second compensation layer 320 using an organic material may reduce a hole injection barrier, resulting in a higher utilization rate of electrons and holes in the second light emitting layer 310.

It is understood that the manner of the overlap between the first compensation layer 220 and the second compensation layer 320 is not limited on the side of the protrusion 120 away from the substrate 101. For example, the first compensation layer 220 may be stacked on a side of the second compensation layer 320 away from the protrusion 120. Alternatively, the first compensation layer 220 may be stacked on a side of the second compensation layer 320 away from the protrusion 120.

It can be understood that the adjacent first compensation layer 220 and the second compensation layer 320 refer to the first compensation layer 220 and the second compensation layer 320 which are positioned on the top of the same protrusion 120. The first compensation layer 220 and the second compensation layer 320 are not limited to be attached to the top of the protrusion 120. Overlapping on top of the protrusion 120 in a direction away from the substrate 101 may increase the resistance value of the pixel space region 106.

In this embodiment, the adjacent first light emitting layer 210 and the second light emitting layer 310 at least partially overlap in the orthographic projection of the protrusion 120. The adjacent first compensation layer 220 and the second compensation layer 320 at least partially overlap in the orthographic projection of the protrusion 120. The top of the protrusion 120 is overlapped with 4 layers of materials, so that the pixel space region 106 has a large resistance value. When the display panel 10 is in operation, the light emitting function layer in the pixel space 106 is not easy to pass current. Therefore, when the display panel 10 operates, the display panel 10 has high luminous efficiency without changing the magnitude of the driving voltage.

Referring again to fig. 4, in one embodiment, the second compensation layer 320 may be disposed between the first light emitting layer 210 and the first compensation layer 220 on a side of the protrusion 120 away from the substrate 101. In preparing the display panel 10, the first compensation layer 220 may be deposited first. Then, the second compensation layer 320 is deposited. Finally, the first light emitting layer 210 is deposited. When the display panel 10 is manufactured, the first light emitting layer 210 and the second light emitting layer 310 can be further deposited only after the first compensation layer 220 and the second compensation layer 320 are deposited. Thus, the display panel 10 can be manufactured by an existing manufacturing process without increasing equipment cost.

In one embodiment, as shown in fig. 5, the first light emitting layer 210 may be disposed between the first compensation layer 220 and the second compensation layer 320 on a side of the protrusion 120 away from the substrate 101. In preparing the display panel 10, the first compensation layer 220 may be deposited first. Then, the first light emitting layer 210 is deposited. Finally, the second compensation layer 320 is deposited. That is, the first light emitting layer 210 may be deposited before the second compensation layer 320 as long as the resistance value of the pixel space region 106 is increased.

Referring to fig. 6, in an embodiment, the orthographic projection of the protrusion 120 of the adjacent first compensation layer 220 and the second compensation layer 320 at least partially overlap. At this time, the adjacent first light emitting layer 210 and the second light emitting layer 310 do not overlap in the orthogonal projection of the protrusion 120. That is, two layers of materials are overlapped on the top of the protrusion 120, so that the pixel space region 106 has a large resistance value. Therefore, when the display panel 10 is in operation, the light emitting function layer in the pixel spacer 106 is not easy to pass current, so that the leakage loss of the pixel spacer 106 can be avoided.

In one embodiment, the protrusion 120 has a first surface facing away from the substrate 101. The area of the overlapping portion of the first light emission functional layer 200 and the second light emission functional layer 300 is smaller than or equal to the area of the first surface. It is to be understood that the area of the overlapping portion of the orthographic projection of the first light emitting functional layer 200 and the orthographic projection of the second light emitting functional layer 300 may be less than or equal to the area of the first surface. That is, the overlapping portion of the first light emission functional layer 200 and the second light emission functional layer 300 may be entirely located within the first surface without covering the pixel opening 110 in the orthographic projection of the pixel defining layer 100. On the basis of increasing the thickness of the top film layer of the protrusion 120, the film layer thickness at any position of the top of the protrusion 120 is the same. I.e., the resistance value of the resistor increases at any position in the pixel space region 106. After the resistance of the pixel spacer 106 is increased, the current is not easy to pass through the light emitting function layer in the pixel spacer 106. Therefore, when the display panel 10 operates, the display panel 10 has high light emitting efficiency without changing the magnitude of the driving voltage.

Further, the area of the overlapping portion of the first light emission functional layer 200 and the second light emission functional layer 300 may be 50% to 100% of the first surface. Preferably, the area of the overlapping portion of the first light emitting function layer 200 and the second light emitting function layer 300 is the same as the area of the first surface. The thickness of the film layer at any position on the top of the protrusion 120 is the same. The thickness of any position of the pixel spacer 106 is the same, so that the display uniformity of the display panel 10 can be improved.

The distance between the overlapping portion of the first light emission functional layer 200 and the second light emission functional layer 300 and the pixel opening 110 adjacent to the projection 120 is 0% to 40% of the length of the first surface. That is, the distance between the edge of the overlapping portion of the first light-emitting functional layer 200 and the second light-emitting functional layer 300 and the pixel opening 110 adjacent to the projection 120 is 0% to 40% of the pitch between the pixel openings 110 adjacent to the projection. The overlapping portion of the first light emitting function layer 200 and the second light emitting function layer 300 may be entirely located within the first surface, not covering the pixel opening 110. This allows the pixel light emitting region 105 to emit light normally without color mixing.

Referring to fig. 7, in an embodiment, the display panel 10 further includes a plurality of third light-emitting functional layers 400. Each of the third light emitting function layers 400 covers one of the pixel openings 110. The third light-emitting functional layer 400 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is far from the substrate 101. The adjacent first light-emitting functional layer 200, second light-emitting functional layer 300 and third light-emitting functional layer 400 are at least partially overlapped in the orthographic projection of the projection 120.

The colors of the light emitted from the first light-emitting functional layer 200, the second light-emitting functional layer 300, and the third light-emitting functional layer 400 may be different. If the first light emitting functional layer 200 is used for red light emission and the second light emitting functional layer 300 is used for blue light emission, the third light emitting functional layer 400 may be used for green light emission. If the first light emitting function layer 200 is used for emitting green light and the second light emitting function layer 300 is used for emitting red light, the third light emitting function layer 400 may be used for emitting blue light. It is understood that the first light emitting function layer 200, the second light emitting function layer 300, and the third light emitting function layer 400 may constitute one pixel unit.

It is to be understood that each of the third light emitting function layers 400 covers one of the pixel openings 110. That is, the number of the pixel openings 110 may be equal to the sum of the number of the first light emission function layers 200, the number of the second light emission function layers 300, and the number of the third light emission function layers 400. That is, each of the pixel openings 110 can be covered only by any one of the first light emitting function layer 200, the second light emitting function layer 300, and the third light emitting function layer 400.

It is understood that the third light emitting function layer 400 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is far from the substrate 101. That is, the orthographic projection of the third light-emitting functional layer 400 on the protrusion 120 may at least partially cover the surface of the protrusion 120 away from the substrate 101. That is, the third luminescence function layer 400 may at least partially cover the top of the protrusion 120.

It is understood that adjacent first, second and third light-emitting

functional layers

200, 300 and 400 at least partially overlap in the orthographic projection of the protrusions 120. That is, the orthographic projection of the first light-emitting functional layer 200 on the top of the protrusions 120, the orthographic projection of the second light-emitting functional layer 300 on the top of the protrusions 120, and the orthographic projection of the third light-emitting functional layer 400 on the top of the protrusions 120 are at least partially overlapped. For example, the second light emission function layer 300 may be laminated between the first light emission function layer 200 and the third light emission function layer 400 on top of the protrusions 120.

In this embodiment, the orthographic projections of the adjacent first light-emitting functional layer 200, the second light-emitting functional layer 300 and the third light-emitting functional layer 400 on the protrusions 120 are at least partially overlapped, so that the thickness of the film layer on the tops of the protrusions 120 can be further increased. The thickness of the pixel space region 106 corresponding to the protrusion 120 is increased, so that the resistance value of the pixel space region 106 can be further increased. After the resistance value of the pixel spacing area 106 is further increased, the current is not easy to pass through the light emitting function layer in the pixel spacing area 106. Therefore, when the display panel 10 operates, the display panel 10 has high light emitting efficiency without changing the magnitude of the driving voltage.

Referring to fig. 8, in one embodiment, the third light emitting function layer 400 includes a third light emitting layer 410. The third light emitting layer 410 covers one of the pixel openings 110. The third light emitting layer 410 extends to a side of the protrusion 120 away from the substrate 101 adjacent to the pixel opening 110. The adjacent first light emitting functional layer 200, second light emitting functional layer 300 and third light emitting layer 410 are at least partially overlapped in the orthographic projection of the projection 120.

It is understood that adjacent first light emitting functional layer 200, second light emitting functional layer 300 and third light emitting layer 410 overlap at least partially in the orthographic projection of the protrusions 120. The top of the protrusion 120 is overlapped with 3 layers of materials, so that the pixel space region 106 has a large resistance value. When the display panel 10 is in operation, the light emitting function layer in the pixel space 106 is not easy to pass current. Therefore, when the display panel 10 operates, the display panel 10 has high light emitting efficiency without changing the magnitude of the driving voltage.

It is to be understood that the manner in which the first light emitting functional layer 200, the second light emitting functional layer 300, and the third light emitting layer 410 overlap with each other on the side of the projection 120 away from the substrate 101 is not limited. For example, the third light emitting layer 410 may be laminated between the first light emitting function layer 200 and the second light emitting function layer 300. Specifically, the lamination manner of the third light emitting layer 410, the first light emitting layer 210, the first compensation layer 220, the second light emitting layer 310, the second compensation layer 320 and the like may be selected according to actual requirements, and is not particularly limited herein, as long as at least partial overlapping of the orthographic projections of the adjacent first light emitting functional layer 200, the second light emitting functional layer 300 and the third light emitting layer 410 on the protrusion 120 is ensured.

The adjacent third light emitting layer 410, the first light emitting layer 210 and the second light emitting layer 310 at least partially overlap in a forward projection of the protrusion 120. In this case, the orthographic projections of the first compensation layer 220 and the second compensation layer 320 on the protrusion 120 do not overlap. That is, the orthographic projection of the first light-emitting layer 210 on the protrusion 120, the orthographic projection of the second light-emitting layer 310 on the protrusion 120, and the orthographic projection of the third light-emitting layer 410 on the protrusion 120 at least partially overlap. That is, the top of the protrusion 120 is overlappingly provided with 3 layers of materials, so that the pixel space region 106 has a large resistance value. Therefore, when the display panel 10 is in operation, the light emitting function layer in the pixel space 106 is not easy to pass current, so that the light emitting efficiency of the display panel 10 is improved without changing the magnitude of the driving voltage.

The colors of light emitted from the first light emitting layer 210, the second light emitting layer 310, and the third light emitting layer 410 may be different from each other. If the first light emitting layer 210 is used for red light emission and the second light emitting layer 310 is used for blue light emission, the third light emitting layer 410 may be used for green light emission. If the first light emitting layer 210 is used to emit green light and the second light emitting layer 310 is used to emit blue light, the third light emitting layer 410 may be used to emit red light.

Referring to fig. 9, in an embodiment, the third light emitting function layer 400 further includes a third compensation layer 420 stacked with the third light emitting layer 410. The third compensation layer 420 covers one of the pixel openings 110 and is closer to the protrusion 120 than the third light emitting layer 410. The third compensation layer 420 extends to a side of the protrusion 120 adjacent to the pixel opening 110, which is far from the substrate 101. The adjacent first light-emitting functional layer 200, the second light-emitting functional layer 300 and the third compensation layer 420 at least partially overlap in the orthographic projection of the projection 120.

It is understood that the third compensation layer 420 covers one of the pixel openings 110 and is closer to the protrusion 120 than the third light emitting layer 410. That is, the third compensation layer 420 is disposed on a side of the third light emitting layer 410 close to the protrusion 120. It is understood that the orthographic projection of the third compensation layer 420 on the protrusion 120 may at least partially cover the surface of the protrusion 120 away from the substrate 101.

It is understood that the third light emitting layer 410 is stacked on the side of the third compensation layer 420 away from the pixel opening 110. That is, the light emitting efficiency of the third light emitting layer 410 can be improved by the third compensation layer 420, so that the display quality of the display panel 10 can be improved. It is understood that the material of the third compensation layer 420 may be an organic material. For example, the organic material may be a triarylamine derivative, a spirobifluorene derivative, a carbazole derivative, or the like.

It is to be understood that the manner in which the first light emission functional layer 200, the second light emission functional layer 300, and the third compensation layer 420 overlap with each other on the side of the protrusions 120 away from the substrate 101 is not limited. For example, the third compensation layer 420 may be laminated between the first light emission function layer 200 and the second light emission function layer 300. Specifically, the stacking manner of the third light emitting layer 410, the third compensation layer 420, the first light emitting layer 210, the first compensation layer 220, the second light emitting layer 310, the second compensation layer 320 and the like may be selected according to actual requirements, and is not particularly limited herein, as long as at least partial overlapping of the orthographic projections of the adjacent first light emitting functional layer 200, the second light emitting functional layer 300 and the third compensation layer 420 on the protrusion 120 is ensured.

In one embodiment, the adjacent third light emitting layer 410, the first light emitting layer 210 and the second light emitting layer 310 at least partially overlap in a forward projection of the protrusion 120. The orthographic projections of the first compensation layer 220, the second compensation layer 320 and the third compensation layer 420 on the protrusions 120 also at least partially overlap.

In this embodiment, on the top of the protrusion 120, the adjacent film layers, such as the third light emitting layer 410, the third compensation layer 420, the first light emitting layer 210, the first compensation layer 220, the second light emitting layer 310, and the second compensation layer 320, are stacked on top of each other, so as to further increase the number of film layer stacking layers on the top of the protrusion 120. That is, 6 layers of material are overlappingly disposed on top of the protrusions 120, so that the pixel space region 106 has a large resistance value. Therefore, when the display panel 10 is in operation, the light emitting function layer in the pixel space 106 is not easy to pass current, so that the light emitting efficiency of the display panel 10 is improved without changing the magnitude of the driving voltage.

Referring to fig. 10, in an embodiment, adjacent first compensation layers 220, second compensation layers 320, and third compensation layers 420 overlap at least a portion of the orthographic projection of the protrusion 120. At this time, the orthographic projections of the third light emitting layer 410, the first light emitting layer 210 and the second light emitting layer 310 on the protrusion 120 do not overlap. Namely, the orthographic projection of the first compensation layer 220 on the protrusion 120, the orthographic projection of the second compensation layer 320 on the protrusion 120 and the orthographic projection of the third compensation layer 420 on the protrusion 120 at least partially overlap. That is, the top of the protrusion 120 is overlapped with 3 layers of materials, so that the pixel space region 106 has a large resistance value. Therefore, when the display panel 10 is in operation, the light emitting function layer in the pixel space 106 is not easy to pass current, so that the light emitting efficiency of the display panel 10 is improved without changing the magnitude of the driving voltage.

In one embodiment, three light emitting layers, i.e., the third light emitting layer 410, the first light emitting layer 210, and the second light emitting layer 310, are stacked on three compensation layers, i.e., the first compensation layer 220, the second compensation layer 320, and the third compensation layer 420, on a side of the protrusion 120 away from the substrate 101. That is, in the preparation of the display panel 10, after all three compensation layers are deposited, each light emitting layer may be further deposited. Thus, the display panel 10 can be manufactured by an existing manufacturing process without increasing equipment cost.

In one embodiment, the protrusion 120 has a first surface, and the first surface is located on a side of the protrusion 120 away from the substrate 101. The area of the overlapping region of the orthographic projection of the first light-emitting functional layer 200 on the projection 120, the orthographic projection of the second light-emitting functional layer 300 on the projection 120 and the orthographic projection of the third light-emitting functional layer 400 on the projection 120 is smaller than or equal to the area of the first surface. It is understood that the area of the overlapping portion of the orthographic projection of the first light emission functional layer 200, the orthographic projection of the second light emission functional layer 300, and the orthographic projection of the third light emission functional layer 400 is smaller than or equal to the area of the first surface. That is, the overlapping portions of the first light emission functional layer 200, the second light emission functional layer 300, and the third light emission functional layer 400 do not cover the pixel opening 110. On the basis of increasing the thickness of the top film layer of the protrusion 120, the film layer thickness at any position of the top of the protrusion 120 is the same. I.e., the resistance value of the resistor increases at any position in the pixel space region 106. After the resistance of the pixel spacer 106 is increased, the current is not easy to pass through the light emitting function layer in the pixel spacer 106. Therefore, when the display panel 10 operates, the display panel 10 has high light emitting efficiency without changing the magnitude of the driving voltage.

In one embodiment, it is assumed that the light emitted from the first light emitting layer 210 is red light, the light emitted from the second light emitting layer 310 is blue light, and the light emitted from the third light emitting layer 410 is green light. If two light emitting layers (i.e., two of the third light emitting layer 410, the first light emitting layer 210, and the second light emitting layer 310) and two compensation layers (i.e., two of the third compensation layer 420, the first compensation layer 220, and the second compensation layer 320) are stacked on top of each of the protrusions 120, when the display panel 10 emits light with the same driving current, the red light emitting efficiency of the display panel 10 is as shown in fig. 11, and the red light emitting efficiency after stacking (i.e., two light emitting layers and two compensation layers are stacked on top of each of the protrusions 120) is significantly higher than the red light emitting efficiency before stacking.

Similarly, the green light emission efficiency of the display panel 10 is as shown in fig. 12, and the green light emission efficiency after lamination is significantly higher than that before lamination. As shown in fig. 13, the blue light emission efficiency of the display panel 10 is significantly higher after lamination than before lamination.

Therefore, the monochromatic light emitting efficiency when the top of the protrusion 120 is stacked with two light emitting layers and two compensation layers is obviously higher than that when the top of the protrusion 120 is stacked with the light emitting layers and the compensation layers. Therefore, the orthographic projections of the adjacent first light-emitting functional layer 200, the second light-emitting functional layer 300 and the third light-emitting functional layer 400 on the protrusions 120 are at least partially overlapped, so that the thickness of the film layer on the tops of the protrusions 120 can be increased. The increased thickness of the film layer increases the resistance of the film layer on the top of the protrusion 120, so that the light emitting function layer in the pixel spacer 106 is not easy to pass through. Therefore, when the display panel 10 operates, the display panel 10 has high luminous efficiency without changing the magnitude of the driving voltage.

Referring to fig. 14, in one embodiment, the present application further provides a method for manufacturing the display panel, including the following steps:

s100, providing a substrate 101, and forming a plurality of anode layers 102 arranged at intervals on the substrate 101;

s200, forming a pixel defining layer 100 with a plurality of pixel openings 110 on the surface of the substrate 101 and the surface of the anode layer 102 far away from the substrate 101;

s300, forming a first carrier layer 103 on the surface of the pixel defining layer 100 away from the substrate 101;

s400, forming a plurality of first light emitting function layers 200 on the surface of the first charge carrier layer 103 away from the pixel defining layer 100;

s500, forming a plurality of second light emitting function layers 300 on the surface of the first carrier layer 103 away from the pixel defining layer 100;

s600, forming a plurality of third light emitting function layers 400 on the surface of the first carrier layer 103 away from the pixel defining layer 100;

s700, forming a second charge carrier layer 104 on the surface of the first light-emitting functional layer 200, the second light-emitting functional layer 300, and the third light-emitting functional layer 400 away from the first charge carrier layer 103;

s800, forming a cathode layer 107 on the surface of the second carrier layer 104 away from the first light-emitting functional layer 200, the second light-emitting functional layer 300, and the third light-emitting functional layer 400.

In S100, the substrate 101 is a Thin Film Transistor (TFT) array substrate. The substrate 101 includes a substrate, and a gate layer, an active layer, an etching stopper layer, a passivation layer, a planarization layer, and the like, which are stacked on the substrate. The anode layer 102 is typically made of a transparent conductive material, such as Indium Tin Oxide (ITO).

In S200, the pixel defining layer 100 may be a material such as a phenol-formaldehyde polymer or polyvinyl alcohol. Specifically, the pixel defining layer 100 is formed on the anode layer 102 and the substrate 101 by spin coating or doctor blading using a material such as resin, polyimide, silicone, silicon dioxide, or photoresist. The thickness of the pixel defining layer 100 may be between 0.1 μm and 100 μm, and then the pixel defining layer 100 is patterned by using processes of exposure, development, drying, and the like, so as to form the pixel defining layer 100 having a plurality of the pixel openings 110. Each of the pixel openings 110 corresponds to one of the anode layers 102.

In S300, the first charge carrier layer 103 may include a hole injection layer and a hole transport layer. Specifically, an open Mask (pen Mask) may be used to evaporate the hole injection layer and the hole transport layer on the surface of the pixel defining layer 100 away from the substrate 101. The hole injection layer may have a thickness of 1nm to 50 nm. The thickness of the hole transport layer may be between 1nm and 50 nm.

In S400, the first light emitting function layer 200 may include a first light emitting layer 210 and a first compensation layer 220. Specifically, a Fine Mask (Fine Mask) may be first used to deposit the first compensation layer 220 on the surface of the first carrier layer 103 away from the pixel defining layer 100. Then, another Fine Mask (Fine Mask) is used to evaporate the first light emitting layer 210 on the surface of the first compensation layer 220 away from the first carrier layer 103. Wherein the thickness of the first light emitting layer 210 may be between 10nm and 100 nm. The thickness of the first compensation layer 220 may be between 50nm and 100 nm.

In S500, the second light emitting function layer 300 may include a second light emitting layer 310 and a second compensation layer 320. Specifically, a Fine Mask (Fine Mask) may be first used to deposit the second compensation layer 320 on the surface of the first carrier layer 103 away from the pixel defining layer 100. Then, another Fine Mask (Fine Mask) is used to evaporate the second light emitting layer 310 on the surface of the second compensation layer 320 far from the first carrier layer 103. Wherein the thickness of the second light emitting layer 310 may be between 10nm and 100 nm. The thickness of the second compensation layer 220 may be 20nm or less.

In S600, the third light emitting function layer 400 may include a third light emitting layer 410 and a third compensation layer 420. Specifically, a Fine Mask (Fine Mask) may be first used to evaporate the third compensation layer 420 on the surface of the first carrier layer 103 away from the pixel defining layer 100. Then, another Fine Mask (Fine Mask) is used to evaporate the third light emitting layer 410 on the surface of the third compensation layer 420 away from the first carrier layer 103. Wherein the thickness of the third light emitting layer 410 may be between 10nm and 100 nm. The thickness of the second compensation layer 220 may be between 10nm and 50 nm.

It is understood that the size of the openings of the fine mask used in steps S400 to S600 is increased by at least 10% compared to the size of the conventional fine mask openings. This allows the adjacent first, second and third light-emitting

functional layers

200, 300 and 400 to at least partially overlap each other in the orthographic projection of the projection 120.

At this time, since the orthographic projections of the adjacent first light-emitting functional layer 200, the second light-emitting functional layer 300 and the third light-emitting functional layer 400 on the protrusions 120 are at least partially overlapped, the thickness of the film layer on the tops of the protrusions 120 can be increased. The increased thickness of the film layer increases the resistance of the film layer on the top of the protrusion 120, so that the light emitting function layer in the pixel space 106 is not easy to pass through. Therefore, when the display panel 10 operates, the display panel 10 has high luminous efficiency without changing the magnitude of the driving voltage.

In S700, the second charge carrier layer 104 may include an electron transport layer and an electron injection layer. Specifically, the electron transport layer and the electron injection layer may be evaporated on the surfaces of the first light emitting functional layer 200, the second light emitting functional layer 300, and the third light emitting functional layer 400, which are far from the first carrier layer 103, by using an open Mask (pen Mask). The thickness of the electron transport layer may be between 10nm and 100 nm. The thickness of the electron injection layer may be 10nm or less.

In S800, after the second charge carrier layer 104 is completely evaporated, an evaporation process or an inkjet printing manner is adopted, and a cathode layer 107 is formed on the surface of the second charge carrier layer 104 away from the first light-emitting functional layer 200, the second light-emitting functional layer 300, and the third light-emitting functional layer 400. The cathode layer 107 may be one or more of indium tin oxide, silver, magnesium. The thickness of the cathode layer 107 may be between 10nm and 300 nm.

In this embodiment, when the light-emitting functional layers (i.e., the first light-emitting functional layer 200, the second light-emitting functional layer 300, and the third light-emitting functional layer 400) are prepared by the display panel preparation method, the size of the opening of the used fine mask is at least 10% larger than that of the opening of the conventional fine mask, so that the orthographic projections of the adjacent first light-emitting functional layer 200, the second light-emitting functional layer 300, and the third light-emitting functional layer 400 on the protrusions 120 at least partially overlap. Thereby increasing the thickness of the film layer on top of the protrusions 120. The increased thickness of the film layer increases the resistance of the film layer on top of the bumps 120. Thereby avoiding the leakage loss between the adjacent pixel openings 110 and further improving the light emitting efficiency of the display panel 10.

In one embodiment, the present application provides a display panel 20. The display panel 20 includes the display panel 10 of any one of the above embodiments.

In this embodiment, the display device may be applied to any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. Since the principle of the display device to solve the problem is similar to the display panel 10, the display device can be implemented by referring to the implementation of the display panel 10, and repeated descriptions are omitted.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A display panel, comprising:

a substrate (101);

the pixel defining layer (100) is positioned on one side of the substrate (101), the pixel defining layer (100) is provided with a plurality of pixel openings (110) which are arranged at intervals, and a bulge (120) is formed between every two adjacent pixel openings (110);

a plurality of first light-emitting functional layers (200), wherein each first light-emitting functional layer (200) covers one pixel opening (110), and the first light-emitting functional layers (200) extend to the side, away from the substrate (101), of the bulges (120) adjacent to the pixel openings (110);

a plurality of second light-emitting functional layers (300), wherein each second light-emitting functional layer (300) covers one pixel opening (110), and the second light-emitting functional layers (300) extend to the side, away from the substrate (101), of the protrusions (120) adjacent to the pixel openings (110);

the adjacent first light-emitting functional layer (200) and the second light-emitting functional layer (300) are at least partially overlapped in the orthographic projection of the bulge (120);

the display panel further includes:

a plurality of third light-emitting functional layers (400), each third light-emitting functional layer (400) covering one of the pixel openings (110), and the third light-emitting functional layers (400) extending to a side of the protrusions (120) adjacent to the pixel openings (110) away from the substrate (101);

the adjacent first light-emitting functional layer (200), the second light-emitting functional layer (300) and the third light-emitting functional layer (400) are at least partially overlapped in the orthographic projection of the projection (120).

2. The display panel according to claim 1, wherein the first luminescent functional layer (200) comprises first luminescent layers (210), each of the first luminescent layers (210) covering one of the pixel openings (110) and extending to a side of the protrusion (120) adjacent to the pixel opening (110) away from the substrate (101);

the second light-emitting function layer (300) comprises second light-emitting layers (310), each second light-emitting layer (310) covers one pixel opening (110) and extends to one side, away from the substrate (101), of the protrusion (120) adjacent to the pixel opening (110);

the adjacent first light-emitting layer (210) and the second light-emitting layer (310) at least partially overlap in an orthographic projection of the protrusion (120).

3. The display panel according to claim 2, wherein the first luminescent functional layer (200) further comprises first compensation layers (220), the first compensation layers (220) are disposed on a side of the first luminescent layer (210) close to the protrusions (120), each of the first compensation layers (220) covers one of the pixel openings (110) and extends to a side of the protrusion (120) adjacent to the pixel opening (110) away from the substrate (101);

the second light-emitting functional layer (300) further comprises second compensation layers (320), the second compensation layers (320) are arranged on one sides, close to the protrusions (120), of the second light-emitting layers (310), and each second compensation layer (320) covers one pixel opening (110) and extends to one side, far away from the substrate (101), of the protrusion (120) adjacent to the pixel opening (110);

the adjacent first compensation layer (220) and the second compensation layer (320) at least partially overlap in the orthographic projection of the protrusion (120).

4. A display panel as claimed in claim 3 characterized in that the second compensation layer (320) is arranged between the first light-emitting layer (210) and the first compensation layer (220) on the side of the protrusion (120) facing away from the substrate (101).

5. The display panel according to claim 1, wherein the first luminescent functional layer (200) comprises first compensation layers (220), each of the first compensation layers (220) covering one of the pixel openings (110) and extending to a side of the protrusion (120) adjacent to the pixel opening (110) away from the substrate (101);

the second light-emitting function layer (300) comprises second compensation layers (320), each second compensation layer (320) covers one pixel opening (110) and extends to one side, away from the substrate (101), of the bulge (120) adjacent to the pixel opening (110);

6. The display panel according to claim 1, wherein the protrusion (120) has a first surface facing away from the substrate (101), and an area of an overlapping portion of the first light emitting functional layer (200) and the second light emitting functional layer (300) is smaller than or equal to an area of the first surface.

7. The display panel according to claim 6, wherein an area of an overlapping portion of the first light emission functional layer (200) and the second light emission functional layer (300) is 50% to 100% of an area of the first surface.

8. The display panel according to claim 6, wherein a distance between an overlapping portion of the first light emission functional layer (200) and the second light emission functional layer (300) and the pixel opening (110) adjacent to the projection (120) is 0% to 40% of a length of the first surface.

9. The display panel according to claim 1, wherein the third light emitting functional layer (400) comprises third light emitting layers (410), each of the third light emitting layers (410) covering one of the pixel openings (110) and extending to a side of the protrusion (120) adjacent to the pixel opening (110) away from the substrate (101);

the adjacent first light-emitting functional layer (200), the second light-emitting functional layer (300) and the third light-emitting layer (410) at least partially overlap in the orthographic projection of the projection (120).

10. The display panel according to claim 9, wherein the third light emitting function layer (400) further comprises a third compensation layer (420), the third compensation layer (420) is disposed on a side of the third light emitting layer (410) close to the protrusions (120), each of the third compensation layers (420) covers one of the pixel openings (110) and extends to a side of the protrusion (120) adjacent to the pixel opening (110) away from the substrate (101);

the adjacent first light-emitting functional layer (200), the second light-emitting functional layer (300) and the third compensation layer (420) at least partially overlap in the orthographic projection of the projection (120).

11. A display device, comprising: the display panel of any one of claims 1-10.