WO2024103788A1

WO2024103788A1 - Display panel and display device

Info

Publication number: WO2024103788A1
Application number: PCT/CN2023/104792
Authority: WO
Inventors: 黄灿; 金映秀; 张春鹏; 鲜于文旭
Original assignee: 武汉华星光电半导体显示技术有限公司
Priority date: 2022-11-15
Filing date: 2023-06-30
Publication date: 2024-05-23
Also published as: CN115666173A

Abstract

Disclosed in embodiments of the present invention are a display panel and a display device. The display panel comprises an array substrate, a pixel defining layer, and a light-emitting functional layer; the pixel defining layer comprises a plurality of pixel openings; the light-emitting functional layer comprises a plurality of light-emitting functional units arranged at intervals, one light-emitting functional unit corresponds to one pixel opening, and the light-emitting functional unit comprises a first common portion, a second common portion, and a light-emitting material portion located between the first common portion and the second common portion.

Description

Display panel and display device

Technical Field

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

Background technique

In recent years, the performance quality of display panels has received more and more attention from consumers. Among them, aperture ratio and pixel density are important display indicators of display panels. How to improve the aperture ratio and pixel density of display panels is a topic of common research among technical personnel.

Therefore, a display panel and a display device are urgently needed to solve the above technical problems.

SUMMARY OF THE INVENTION

The present invention provides a display panel and a display device, which can increase the aperture ratio and pixel density of the current display panel.

To solve the above problems, the technical solutions provided by this application are as follows:

The present invention provides a display panel, comprising:

An array substrate;

A pixel definition layer, located on one side of the array substrate, the pixel definition layer comprising a plurality of pixel openings;

A light-emitting functional layer is located on the same side of the array substrate and the pixel definition layer;

Among them, the light-emitting functional layer includes a plurality of light-emitting functional units arranged at intervals, one light-emitting functional unit corresponds to one pixel opening, and the light-emitting functional unit includes a light-emitting material portion, a first common portion and a second common portion, and the light-emitting material portion is located between the first common portion and the second common portion.

In some embodiments, the pixel opening includes a bottom and a side wall; the light-emitting functional unit includes at least a first part, the first part corresponds to the bottom, and the orthographic projection of the first part on the array substrate coincides with the orthographic projection of the bottom of the pixel opening on the array substrate.

In some embodiments, the light-emitting functional unit further includes a second portion located outside the first portion and connected to the first portion; wherein the second portion is located on the side wall of the pixel opening.

In some embodiments, the light-emitting functional unit further includes a third portion located outside the second portion and connected to the second portion; wherein the orthographic projection of the third portion on the pixel definition layer is located outside the pixel opening.

In some embodiments, the area of the orthographic projection of the light-emitting functional unit on the array substrate is the unit area, and the area of the orthographic projection of the first part on the array substrate is the first area; wherein the ratio of the unit area to the first area is 1 to 6/5.

In some embodiments, the display panel includes a central display area and an edge display area, and the ratio of the first area of the light-emitting functional unit to the unit area in the central display area is greater than the ratio of the first area of the light-emitting functional unit to the unit area in the edge display area.

In some embodiments, the display panel includes an under-screen display area and a main display area located outside the under-screen display area, and the ratio of the first area of the light-emitting functional unit to the unit area in the under-screen display area is greater than the ratio of the first area of the light-emitting functional unit to the unit area in the main display area.

In some embodiments, the light-emitting colors of the plurality of light-emitting functional units include red, green, and blue;

Among them, the area of the orthographic projection of the first part of the light-emitting functional unit with a blue light-emitting color on the array substrate is larger than the area of the orthographic projection of the first part of the light-emitting functional unit with a red light-emitting color on the array substrate, and the area of the orthographic projection of the first part of the light-emitting functional unit with a red light-emitting color on the array substrate is larger than the area of the orthographic projection of the first part of the light-emitting functional unit with a green light-emitting color on the array substrate.

In some embodiments, within the same light-emitting functional unit, the orthographic projection of the film layer far from the array substrate on the array substrate does not exceed the orthographic projection of the film layer close to the array substrate on the array substrate.

In some embodiments, within the same light-emitting functional unit, in any two adjacent film layers, the outer contour of the surface of the film layer away from the array substrate close to the array substrate is arranged to coincide with the outer contour of the surface of the film layer close to the array substrate away from the array substrate; the slopes of the corresponding end faces of any two adjacent film layers within the light-emitting functional unit are the same.

In some embodiments, the display panel includes a cathode layer located on a side of the light-emitting functional layer away from the array substrate; wherein the cathode layer covers an end surface of the light-emitting functional unit and is in direct contact with the pixel definition layer.

In some embodiments, the display panel further comprises an optical function layer located on a side of the cathode layer away from the pixel definition layer, and an encapsulation layer located on a side of the optical function layer away from the cathode layer;

Wherein, the cathode layer, the optical functional layer and the encapsulation layer are all arranged as a whole layer.

In some embodiments, the pixel opening includes a bottom and a side wall; the orthographic projection of any film layer in the light-emitting functional unit on the array substrate covers the orthographic projection of the bottom of the pixel opening on the array substrate.

In some embodiments, the first common portion is located on a side of the light-emitting material portion close to the array substrate, and the first common portion includes a combination of any one or more of an electron blocking portion, a hole transport portion, and a hole injection portion; the second common portion includes a combination of any one or more of a hole blocking portion, an electron transport portion, and an electron injection portion.

Among them, the thickness of the light-emitting functional unit with a blue light-emitting color is greater than the thickness of the light-emitting functional unit with a red light-emitting color, and the thickness of the light-emitting functional unit with a red light-emitting color is greater than the thickness of the light-emitting functional unit with a green light-emitting color.

The present invention further provides a display device, including a display panel, wherein the display panel includes:

An array substrate;

In some embodiments, the pixel opening includes a bottom and sidewalls;

The light-emitting functional unit includes at least a first portion, the first portion corresponds to the bottom, and an orthographic projection of the first portion on the array substrate coincides with an orthographic projection of the bottom of the pixel opening on the array substrate.

In some embodiments, the area of the orthographic projection of the light-emitting functional unit on the array substrate is the unit area, and the area of the orthographic projection of the first part on the array substrate is the first area;

The ratio of the unit area to the first area is 1 to 6/5.

In some embodiments, the display panel includes a cathode layer located on a side of the light-emitting functional layer away from the array substrate;

Wherein, the cathode layer covers the end surface of the light-emitting functional unit and is in direct contact with the pixel definition layer.

Beneficial Effects

Beneficial effects of the present invention: The present invention patterns the luminescent material and functional material of the luminescent functional layer to form spaced luminescent functional units, wherein the luminescent functional units include a luminescent material portion, a first common portion and a second common portion. Effective luminescence is achieved while avoiding overlap of luminescent material portions, the first common portion and the second common portion of different colors, thereby eliminating the risk of color mixing. Therefore, the effective luminescent area of a single pixel can be increased, the aperture ratio can be improved, the distance between pixels can be shortened, the pixel density can be increased, and the display effect can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a first structure of a display panel provided by an embodiment of the present invention;

2 is a schematic top view of a second structure of a display panel provided by an embodiment of the present invention;

3 is a schematic structural diagram of a third structure of a display panel provided by an embodiment of the present invention;

4 is a schematic top view of a fourth structure of a display panel provided by an embodiment of the present invention;

5 is a flowchart of the steps of a method for manufacturing a display panel provided in an embodiment of the present invention;

6A to 6B are schematic flow diagrams of a method for manufacturing a display panel provided in an embodiment of the present invention;

FIG. 7 is a schematic diagram of the structure of a display device provided in an embodiment of the present invention.

Embodiments of the present invention

The present application provides a display panel and a display device. To make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

The embodiments of the present application provide a display panel and a display device. The following are detailed descriptions of each. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

Referring to FIG. 1 to FIG. 4 , an embodiment of the present invention provides a display panel 100, including:

An array substrate 200;

A pixel definition layer 300 is located on one side of the array substrate 200 , and the pixel definition layer 300 includes a plurality of pixel openings 310 ;

The light-emitting functional layer 400 is located on the same side of the array substrate 200 and the pixel definition layer 300;

Among them, the light-emitting functional layer 400 includes a plurality of light-emitting functional units 500 arranged at intervals, one of the light-emitting functional units 500 corresponds to one of the pixel openings 310, and the light-emitting functional unit 500 includes a light-emitting material portion 440, a first common portion 401 and a second common portion 402, and the light-emitting material portion 440 is located in the first common portion 401 and the second common portion 402.

The present invention forms spaced light-emitting functional units by patterning the light-emitting material and functional material of the light-emitting functional layer. The light-emitting functional units include a light-emitting material portion, a first common portion and a second common portion. While achieving effective light emission, the overlap of light-emitting material portions, the first common portion and the second common portion of different colors is avoided, and the risk of color mixing is eliminated. Therefore, the effective light-emitting area of a single pixel can be increased, the aperture ratio can be improved, the distance between pixels can be shortened, the pixel density can be increased, and the display effect can be improved.

The technical solution of the present invention is now described in conjunction with specific embodiments.

In this embodiment, please refer to Figures 1 and 2, the display panel 100 includes an array substrate 200, a pixel definition layer 300 and a light-emitting function layer 400 located on one side of the array substrate 200, the pixel definition layer 300 includes a plurality of pixel openings 310, the light-emitting function layer 400 includes a plurality of light-emitting function units 500 arranged at intervals, one light-emitting function unit 500 corresponds to one pixel opening 310, the light-emitting function unit 500 includes a light-emitting material portion 440, a first common portion 401 and a second common portion 402, and the light-emitting material portion 440 is located between the first common portion 401 and the second common portion 402.

The first common portion 401 and the second common portion 402 are used to improve the working performance of electrons or holes.

The second common portion 402 may include any one or a combination of the hole blocking portion 450 , the electron transport portion 460 and the electron injection portion 470 , and the first common portion 401 may also include any one or a combination of the electron blocking portion 430 , the hole transport portion 420 and the hole injection portion 410 .

The hole blocking portion 450 is located on the side of the light-emitting material portion 440 away from the array substrate 200, the electron transmission portion 460 is located on the side of the hole blocking portion 450 away from the array substrate 200, and the electron injection portion 470 is located on the side of the electron transmission portion 460 away from the array substrate 200; the electron blocking portion 430 is located on the side of the light-emitting material portion 440 close to the array substrate 200, the hole transmission portion 420 is located on the side of the electron blocking portion 430 close to the array substrate 200, and the hole injection portion 410 is located on the side of the hole transmission portion 420 close to the array substrate 200.

After patterning, the light-emitting functional units 500 are arranged at intervals, and the continuously arranged light-emitting functional materials are changed into the first common part 401, the second common part 402 and the light-emitting material part 440 which are arranged at intervals, thereby reducing the influence of overlapping functional materials and light-emitting functional materials of different light-emitting colors, eliminating the risk of color mixing, and allowing the effective light-emitting area of a single pixel to be set larger, thereby increasing the aperture ratio, shortening the distance between pixels, increasing pixel density, and improving display effects.

In some embodiments, referring to FIG. 1 and FIG. 2 , the pixel opening 310 includes a bottom 311 and a side wall 312 , and the light-emitting functional unit 500 includes at least a first portion 510 , and the orthographic projection of the first portion 510 on the array substrate 200 coincides with the orthographic projection of the bottom 311 of the pixel opening 310 on the array substrate 200 .

The first part 510 of the light-emitting functional unit 500 corresponds to the bottom 311 of the pixel opening 310, and has a high patterning accuracy. The patterning degree of the light-emitting functional unit 500 can be improved, and the first part 510 is limited to the bottom 311 of the pixel opening 310. The first part 510 is arranged adjacent to the pixel definition layer 300. The bottom 311 of the pixel opening 310 exposes the anode layer 810 of the display panel 100. The first part 510 is electrically connected to the anode layer 810 through the bottom 311 of the pixel opening 310. Therefore, the first part 510 is the effective light-emitting part of the light-emitting functional unit 500. The light-emitting functional units 500 arranged at intervals achieve effective light emission while avoiding the overlap of light-emitting materials of different colors and eliminating the risk of color mixing. Therefore, the effective light-emitting area of a single pixel can be increased, the aperture ratio can be improved, and the life can be extended. Accurate patterning can make the invalid light-emitting area of a single pixel smaller in design, shorten the distance between pixels, increase pixel density, and improve display effects.

In some embodiments, referring to FIG. 1 and FIG. 2 , the display panel 100 includes an anode layer 810 located between the array substrate 200 and the pixel definition layer 300, and a cathode layer 820 located on the side of the light-emitting function layer 400 away from the array substrate 200, the pixel opening 310 exposes the anode layer 810, and the light-emitting function unit 500 is electrically connected to the anode layer 810 through the pixel opening 310. In some embodiments, referring to FIG. 1 and FIG. 2 , the light-emitting function unit 500 further includes a second portion 520 located outside the first portion 510 and connected to the first portion 510; wherein the second portion 520 is located on the side wall 312 of the pixel opening 310.

The patterning accuracy can be reduced to form the second portion 520 and the first portion 510 , and the second portion 520 and the first portion 510 can ensure that the bottom 311 of the pixel opening 310 is covered by the light-emitting functional unit 500 to ensure an effective light-emitting area.

In some embodiments, referring to FIG. 1 and FIG. 2 , the light-emitting functional unit 500 further includes a third portion 530 located outside the second portion 520 and connected to the second portion 520 ; wherein the orthographic projection of the third portion 530 on the pixel definition layer 300 is located outside the pixel opening 310 .

The area of the light-emitting functional unit 500 needs to be greater than or equal to the area of the bottom 311 of the pixel opening 310. The purpose is to leave a process difference for complete coverage, to avoid the light-emitting functional unit 500 not completely covering the bottom 311 of the pixel opening 310 due to insufficient process precision, to avoid a reduction in the effective light-emitting area, and to ensure the light-emitting opening ratio. At the same time, the cathode layer 820 can press down more of the light-emitting functional units 500, to reduce the risk of sliding failure of the light-emitting functional units 500, and to ensure the display effect.

In some embodiments, the area of the orthographic projection of the light-emitting functional unit 500 on the array substrate 200 is the unit area, and the area of the orthographic projection of the first part 510 on the array substrate 200 is the first area; wherein the ratio of the unit area to the first area is 1 to 6/5.

The occupied areas of the second portion 520 and the third portion 530 should not be too large, as too large an area will result in a smaller pixel pitch and affect pixel density.

In some embodiments, referring to FIG. 1 , within the same light-emitting functional unit 500 , the orthographic projection of the film layer away from the array substrate 200 on the array substrate 200 does not exceed the orthographic projection of the film layer close to the array substrate 200 on the array substrate 200 .

In the same light-emitting functional unit 500, the end face of the film layer that is farther away from the array substrate 200 tends to shrink inward, which can prevent the upper film layer from covering the end faces of the lower multi-layer film layers and avoid the risk of abnormal connection of the film layers, thereby ensuring the performance of each film layer in the first common part 401 and the second common part 402 and improving the display effect.

In some embodiments, referring to FIG. 1 , within the same light-emitting functional unit 500, in any two adjacent film layers, the outer contour of the surface of the film layer away from the array substrate 200 on the side close to the array substrate 200 is overlapped with the outer contour of the surface of the film layer close to the array substrate 200 on the side away from the array substrate 200, and the slopes of the corresponding end faces of each film layer within the light-emitting functional unit 500 are the same.

For example, in Figure 1, taking the electron transmission part 460 and the electron injection part 470 as examples, the electron injection part 470 is a film layer away from the array substrate 200, and the electron transmission part 460 is a film layer close to the array substrate 200. The outer contour of the surface of the electron injection part 470 close to the array substrate 200 is arranged to overlap with the surface of the electron transmission part 460 away from the array substrate 200, and the slope of the end face of the electron transmission part 460 is the same as the slope of the end face of the electron injection part 470.

The light-emitting functional units 500 of the same color can be formed by using a mask. The end faces of the light-emitting functional units 500 formed by the mask are also flat. The light-emitting functional layer 400 is patterned to form spaced light-emitting functional units 500. At the same time, the performance of each film layer in the first common part 401 and the second common part 402 can be guaranteed, and the display effect can be improved. The light-emitting functional units 500 of each light-emitting color can be formed separately or uniformly, which is not specifically limited here.

In some embodiments, please refer to FIG3 , the angle θ corresponding to the slope of the end face of the light-emitting functional unit 500 is 20 to 90 degrees. If the slope is too small, the transverse stretching of the light-emitting functional unit 500 is too long, and the size difference between the upper film layer and the lower film layer is too large, which is not conducive to the uniformity of the performance of the film layers of the first common part 401 and the second common part 402; if the slope is too large, on the one hand, the process cannot be realized, and on the other hand, it is easy to cause abnormal overlap between the upper film layer and the lower film layer.

In some embodiments, the second portion 520 and the third portion 530 extend over a length ranging from 0 micrometers to 10 micrometers.

In some embodiments, referring to FIG. 1 and FIG. 2 , the display panel 100 includes an anode layer 810 located between the array substrate 200 and the pixel definition layer 300, and a cathode layer 820 located on the side of the light-emitting functional layer 400 away from the array substrate 200, the pixel opening 310 exposes the anode layer 810, and the light-emitting functional unit 500 is electrically connected to the anode layer 810 through the pixel opening 310; wherein the cathode layer 820 covers the end face of the light-emitting functional unit 500 and is in direct contact with the pixel definition layer 300.

The cathode layer 820 may not be patterned and may be provided as a whole layer of a common electrode. After patterning, the light-emitting functional units 500 are provided at intervals, and the cathode layer 820 covers the end faces of the light-emitting functional units 500 and is in direct contact with the pixel definition layer 300, thereby increasing the contact area between the cathode layer 820 and the light-emitting functional units 500 and the pixel definition layer 300, and improving the adhesion of the cathode layer 820.

In some embodiments, referring to FIG. 1 , the pixel opening 310 includes a bottom 311 and a side wall 312 ; the orthographic projection of any film layer in the light-emitting functional unit 500 on the array substrate 200 covers the orthographic projection of the bottom 311 of the pixel opening 310 on the array substrate 200 .

The first part 510 corresponds to the effective light-emitting area. In the top view direction of the display panel 100, any film layer in the light-emitting functional unit 500 needs to cover the bottom 311 of the pixel opening 310, so as to ensure that the film layers of the first common part 401 and the second common part 402 can exert the performance of their respective film layers, ensure the effective light-emitting area, avoid the risk of reducing the effective light-emitting area due to too small film layer area or tolerance reasons, and improve the display effect.

In some embodiments, referring to FIG. 3 , the luminous colors of the plurality of the luminous functional units 500 include red, green, and blue; wherein the thickness of the luminous functional unit 500 with the luminous color of blue is greater than the thickness of the luminous functional unit 500 with the luminous color of red, and the thickness of the luminous functional unit 500 with the luminous color of red is greater than the thickness of the luminous functional unit 500 with the luminous color of green.

In the figure, R represents red, G represents green, and B represents blue. According to the different luminous characteristics of different colors, the thickness of the luminous functional unit 500 of different colors is set differently to balance the overall luminous brightness and luminous life. For example, the life of the blue luminous material part 440 is shorter than that of the red and green ones, so the thickness of the blue luminous material part 440 is thickened to balance the luminous life of the three colors of red, green and blue; for example, the human eye has a stronger perception of green, so the thickness of the green luminous material part 440 can be appropriately reduced to save materials and reduce costs.

In some embodiments, the light-emitting functional unit 500 does not specifically limit the arrangement of different light-emitting colors, and may be Real RGB or SPR (Sub Pixel Rendering), etc. Please refer to FIG. 4 , where only the SPR arrangement is taken as an example.

In some embodiments, referring to FIG. 4 , the luminous colors of the plurality of the luminous functional units 500 include red, green, and blue; wherein, the area of the orthographic projection of the first portion 510 of the luminous functional unit 500 whose luminous color is blue on the array substrate 200 is larger than the area of the orthographic projection of the first portion 510 of the luminous functional unit 500 whose luminous color is red on the array substrate 200, and the area of the orthographic projection of the first portion 510 of the luminous functional unit 500 whose luminous color is red on the array substrate 200 is larger than the area of the orthographic projection of the first portion 510 of the luminous functional unit 500 whose luminous color is green on the array substrate 200.

According to the different luminous characteristics of different colors, the effective luminous areas of the luminous functional units 500 of different colors are set differently to balance the overall luminous brightness and luminous life. For example, the life of the blue luminous material part 440 is shorter than that of the red and green ones, so the area of the first blue part 510 is increased to balance the luminous life of the three colors of red, green and blue; for example, the human eye has a stronger perception of green, so the area of the first green part 510 can be appropriately reduced to save materials and reduce costs.

In some embodiments, referring to FIG. 1 and FIG. 2 , the display panel 100 further includes an optical functional layer 600 located on a side of the cathode layer 820 away from the pixel definition layer 300, and an encapsulation layer 700 located on a side of the optical functional layer 600 away from the cathode layer 820; wherein the cathode layer 820, the optical functional layer 600 and the encapsulation layer 700 are all arranged as a whole layer.

The optical functional layer 600 may include a light extraction layer 610 and an optical regulation layer 620. The encapsulation layer 700 may include two inorganic encapsulation layers 710 and an organic encapsulation layer 720 located between the two inorganic encapsulation layers 710. The cathode layer 820, the optical functional layer 600 and the encapsulation layer 700 are all arranged as a whole layer to improve the flatness of the film layer.

In some embodiments, the display panel 100 includes a central display area and an edge display area, the arrangement density of the light-emitting functional units 500 in the central display area is greater than the arrangement density of the light-emitting functional units 500 in the edge display area, and the ratio of the first area of the light-emitting functional units 500 in the central display area to the unit area is greater than the ratio of the first area of the light-emitting functional units 500 in the edge display area to the unit area.

The ratio of the first area of the central display area to the unit area is relatively large, which reduces the proportion of the second part 520 and the third part 530 and reduces the invalid luminous area, which is beneficial to increasing the pixel density of the central display area and utilizing the characteristic that the human eye vision is concentrated in the central display area to improve the viewing effect.

In some embodiments, the display panel 100 includes an under-screen display area and a main display area located outside the under-screen display area, the arrangement density of the light-emitting functional units 500 in the main display area is greater than the arrangement density of the light-emitting functional units 500 in the under-screen display area, and the ratio of the first area of the light-emitting functional units 500 in the under-screen display area to the unit area is greater than the ratio of the first area of the light-emitting functional units 500 in the main display area to the unit area.

The display area under the screen requires a higher light transmittance. Reducing the pixel density of the display area under the screen can increase the light transmittance of the display area under the screen, while increasing the proportion of the effective luminous area of the display area under the screen, thereby reducing the proportion of the second part 520 and the third part 530 that are neither luminous nor transparent. The light transmittance of the display area under the screen can also be improved without affecting the luminous area.

In some embodiments, referring to FIG. 1 , the array substrate 200 includes a substrate 210, an active layer 220 located on the substrate 210, a first insulating layer 230 located on the active layer 220, a gate layer 240 located on the first insulating layer 230, a second insulating layer 250 located on the gate layer 240, a source-drain layer 260 located on the second insulating layer 250, and a third insulating layer 270 located on the source-drain layer 260.

Referring to FIG. 5 , an embodiment of the present invention further provides a method for manufacturing a display panel 100 , including:

S100, providing an array substrate 200;

S200, forming an anode layer 810 electrically connected to the array substrate 200 on one side of the array substrate 200;

S300, forming a pixel definition layer 300 including a plurality of pixel openings 310 on a side of the anode layer 810 away from the array substrate 200, wherein the pixel openings 310 expose the anode layer 810;

S400, forming a light-emitting functional material layer 4011 on the pixel definition layer 300;

S500 , patterning the light-emitting functional material layer 4011 , so that the light-emitting functional material layer 4011 forms a first common portion 401 , a second common portion 402 , and a light-emitting material portion 440 located between the first common portion 401 and the second common portion 402 , so as to form light-emitting functional units 500 arranged at intervals.

In this embodiment, the manufacturing method of the display panel 100 includes:

S100, providing an array substrate 200, please refer to FIG. 6A.

In some embodiments, the array substrate 200 includes a substrate 210, an active layer 220 located on the substrate 210, a first insulating layer 230 located on the active layer 220, a gate layer 240 located on the first insulating layer 230, a second insulating layer 250 located on the gate layer 240, a source-drain layer 260 located on the second insulating layer 250, and a third insulating layer 270 located on the source-drain layer 260.

S200 , forming an anode layer 810 electrically connected to the array substrate 200 on one side of the array substrate 200 , refer to FIG. 6A .

In some embodiments, the anode layer 810 is electrically connected to the source-drain layer 260 of the array substrate 200 .

S300 , forming a pixel definition layer 300 including a plurality of pixel openings 310 on a side of the anode layer 810 away from the array substrate 200 , wherein the pixel openings 310 expose the anode layer 810 , as shown in FIG. 6A .

In some embodiments, the anode layer 810 includes a plurality of anode units, and one anode unit corresponds to one pixel opening 310 .

S400 , forming a light-emitting functional material layer 4011 on the pixel definition layer 300 , please refer to FIG. 6A .

In some embodiments, step S400 includes:

S410 , forming a light-emitting functional material layer 4011 on the pixel definition layer 300 by using a common mask and an evaporation process.

There is no RGB evaporation in large-size 8.5-generation lines and above, and white light + color film are used to achieve full color. There is no corresponding refined metal mask evaporation technology for large-generation lines. This application adopts full-surface evaporation and then patterning. A common mask and evaporation process can be used. The mask cost is low, the process is simple, and the production cost is reduced.

In some embodiments, referring to FIG. 6A , the light-emitting functional material layer 4011 includes a hole injection material layer 4101 close to the array substrate 200, a hole transport material layer 4201 located on the side of the hole injection material layer 4101 away from the array substrate 200, an electron blocking material layer 4301 located on the side of the hole transport material layer 4201 away from the array substrate 200, a light-emitting material layer 4401 located on the side of the electron blocking material layer 4301 away from the array substrate 200, a hole blocking material layer 4501 located on the side of the light-emitting material layer 4401 away from the array substrate 200, an electron transport material layer 4601 located on the side of the hole blocking material layer 4501 away from the array substrate 200, and an electron injection material layer 4701 located on the side of the electron transport material layer 4601 away from the array substrate 200.

In some embodiments, the light-emitting material layer 4401 may include any one of red, green and blue light-emitting materials, and materials of different colors may be manufactured in steps.

S500, patterning the light-emitting functional material layer 4011 so that the light-emitting functional material layer 4011 forms a first common portion 401, a second common portion 402 and a light-emitting material portion 440 located between the first common portion 401 and the second common portion 402 to form light-emitting functional units 500 arranged at intervals, please refer to FIG. 6B.

In some embodiments, the patterning method of step S500 may be any one of photolithography patterning, laser patterning, wet etching, and dry etching, which is not specifically limited herein.

In some embodiments, the light-emitting functional unit 500 also includes a second part 520 located at the periphery of the first part 510 and connected to the first part 510, and a third part 530 located at the periphery of the second part 520 and connected to the second part 520; wherein the orthographic projection of the second part 520 on the pixel definition layer 300 is located within the side wall 312 of the pixel opening 310, and the orthographic projection of the third part 530 on the pixel definition layer 300 is located outside the pixel opening 310.

In some embodiments, please refer to FIG. 1 , the corresponding end faces of each film layer in the light-emitting functional unit 500 are flush, and the corresponding end faces of each film layer in the light-emitting functional unit 500 have the same slope. The light-emitting functional units 500 of the same color can be formed using a photomask, and the end faces of each light-emitting functional unit 500 formed using the photomask are also flat. The light-emitting functional layer 400 is patterned to form spaced light-emitting functional units 500, which can be formed separately for each color or uniformly, and no specific limitation is made here.

In some embodiments, the method for manufacturing the display panel 100 further includes:

S600 , forming a cathode layer 820 , an optical functional layer 600 , and a packaging layer 700 in sequence on the light-emitting functional layer 400 , as shown in FIG. 1 .

In some embodiments, the display panel 100 also includes an optical functional layer 600 located on the side of the cathode layer 820 away from the pixel definition layer 300, and an encapsulation layer 700 located on the side of the optical functional layer 600 away from the cathode layer 820; wherein the cathode layer 820, the optical functional layer 600 and the encapsulation layer 700 are all arranged as a whole layer.

The optical function layer 600 may include a light extraction layer 610 and an optical regulation layer 620. The encapsulation layer 700 may include two inorganic layers and an organic layer located between the two inorganic layers. The cathode layer 820, the optical function layer 600 and the encapsulation layer 700 are all arranged as a whole layer to improve the flatness of the film layer.

Please refer to FIG. 7 , an embodiment of the present invention further provides a display device 10 , including any of the above-mentioned display panels 100 .

The specific structure of the display panel 100 may be referred to any of the above embodiments and drawings of the display panel 100 , and will not be described in detail herein.

In this embodiment, the display device 10 further includes a device body 20 , and the device body 20 and the display panel 100 are integrated into one body.

In this embodiment, the device body 20 may include a middle frame, frame glue, external components, etc., and the display device 10 may be a display terminal such as a mobile phone, a tablet, a television, etc., which is not limited here.

The embodiment of the present invention discloses a display panel and a display device; the display panel includes an array substrate, a pixel definition layer and a light-emitting function layer, the pixel definition layer includes a plurality of pixel openings, the light-emitting function layer includes a plurality of light-emitting function units arranged at intervals, one light-emitting function unit corresponds to one pixel opening, and the light-emitting function unit includes a first common portion, a second common portion and a light-emitting material portion located between the first common portion and the second common portion; the present invention forms light-emitting function units arranged at intervals by patterning the light-emitting material and functional material of the light-emitting function layer, the light-emitting function unit includes a light-emitting material portion, a first common portion and a second common portion, thereby achieving effective light emission and avoiding overlap of light-emitting material portions, the first common portion and the second common portion of different colors, thereby eliminating the risk of color mixing, thereby increasing the effective light-emitting area of a single pixel, improving the aperture ratio, shortening the distance between pixels, and improving the pixel density.

It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims

A display panel, comprising:

An array substrate;

A pixel definition layer, located on one side of the array substrate, the pixel definition layer comprising a plurality of pixel openings;

A light-emitting functional layer is located on the same side of the array substrate and the pixel definition layer;

Among them, the light-emitting functional layer includes a plurality of light-emitting functional units arranged at intervals, one light-emitting functional unit corresponds to one pixel opening, and the light-emitting functional unit includes a light-emitting material portion, a first common portion and a second common portion, and the light-emitting material portion is located between the first common portion and the second common portion.
The display panel according to claim 1, wherein the pixel opening comprises a bottom and a side wall;

The light-emitting functional unit includes at least a first portion, the first portion corresponds to the bottom, and an orthographic projection of the first portion on the array substrate coincides with an orthographic projection of the bottom of the pixel opening on the array substrate.
The display panel according to claim 2, wherein the light-emitting functional unit further comprises a second portion located outside the first portion and connected to the first portion;

Wherein, the second portion is located on the side wall of the pixel opening.
The display panel according to claim 3, wherein the light-emitting functional unit further comprises a third portion located outside the second portion and connected to the second portion;

The orthographic projection of the third portion on the pixel definition layer is located outside the pixel opening.
The display panel according to claim 2, wherein an area of an orthographic projection of the light-emitting functional unit on the array substrate is a unit area, and an area of an orthographic projection of the first part on the array substrate is a first area;

The ratio of the unit area to the first area is 1 to 6/5.
The display panel according to claim 5, wherein the display panel comprises a central display area and an edge display area, and a ratio of the first area of the light-emitting functional unit to the unit area in the central display area is greater than a ratio of the first area of the light-emitting functional unit to the unit area in the edge display area.
The display panel according to claim 5, wherein the display panel includes an under-screen display area and a main display area located outside the under-screen display area, and a ratio of the first area of the light-emitting functional unit to the unit area in the under-screen display area is greater than a ratio of the first area of the light-emitting functional unit to the unit area in the main display area.
The display panel according to claim 2, wherein the light emitting colors of the plurality of light emitting functional units include red, green, and blue;

Among them, the area of the orthographic projection of the first part of the light-emitting functional unit with a blue light-emitting color on the array substrate is larger than the area of the orthographic projection of the first part of the light-emitting functional unit with a red light-emitting color on the array substrate, and the area of the orthographic projection of the first part of the light-emitting functional unit with a red light-emitting color on the array substrate is larger than the area of the orthographic projection of the first part of the light-emitting functional unit with a green light-emitting color on the array substrate.
The display panel according to claim 1, wherein, within the same light-emitting functional unit, the orthographic projection of the film layer far from the array substrate on the array substrate does not exceed the orthographic projection of the film layer close to the array substrate on the array substrate.
The display panel according to claim 9, wherein in the same light-emitting functional unit, in any two adjacent film layers, an outer contour of a surface of a film layer away from the array substrate on a side close to the array substrate is arranged to overlap with an outer contour of a surface of a film layer close to the array substrate on a side away from the array substrate;

The slopes of corresponding end faces of any two adjacent film layers in the light-emitting functional unit are the same.
The display panel according to claim 1, wherein the display panel comprises a cathode layer located on a side of the light-emitting functional layer away from the array substrate;

Wherein, the cathode layer covers the end surface of the light-emitting functional unit and is in direct contact with the pixel definition layer.
The display panel according to claim 11, wherein the display panel further comprises an optical function layer located on a side of the cathode layer away from the pixel definition layer, and an encapsulation layer located on a side of the optical function layer away from the cathode layer;

Wherein, the cathode layer, the optical functional layer and the encapsulation layer are all arranged as a whole layer.
The display panel according to claim 1, wherein the pixel opening comprises a bottom and a side wall;

The orthographic projection of any film layer in the light-emitting functional unit on the array substrate covers the orthographic projection of the bottom of the pixel opening on the array substrate.
The display panel according to claim 1, wherein the first common portion is located on a side of the light-emitting material portion close to the array substrate, and the first common portion includes any one or a combination of multiple of an electron blocking portion, a hole transport portion, and a hole injection portion;

The second common portion includes any one or a combination of a hole blocking portion, an electron transporting portion, and an electron injecting portion.
The display panel according to claim 1, wherein the light emitting colors of the plurality of light emitting functional units include red, green, and blue;

Among them, the thickness of the light-emitting functional unit with a blue light-emitting color is greater than the thickness of the light-emitting functional unit with a red light-emitting color, and the thickness of the light-emitting functional unit with a red light-emitting color is greater than the thickness of the light-emitting functional unit with a green light-emitting color.
A display device, comprising a display panel, wherein the display panel comprises:

An array substrate;

A pixel definition layer, located on one side of the array substrate, the pixel definition layer comprising a plurality of pixel openings;

A light-emitting functional layer is located on the same side of the array substrate and the pixel definition layer;

Among them, the light-emitting functional layer includes a plurality of light-emitting functional units arranged at intervals, one light-emitting functional unit corresponds to one pixel opening, and the light-emitting functional unit includes a light-emitting material portion, a first common portion and a second common portion, and the light-emitting material portion is located between the first common portion and the second common portion.
The display device according to claim 16, wherein the pixel opening comprises a bottom and a side wall;

The light-emitting functional unit includes at least a first portion, the first portion corresponds to the bottom, and an orthographic projection of the first portion on the array substrate coincides with an orthographic projection of the bottom of the pixel opening on the array substrate.
The display device according to claim 17, wherein an area of an orthographic projection of the light-emitting functional unit on the array substrate is a unit area, and an area of an orthographic projection of the first part on the array substrate is a first area;

The ratio of the unit area to the first area is 1 to 6/5.
The display device according to claim 16, wherein, within the same light-emitting functional unit, the orthographic projection of the film layer far from the array substrate on the array substrate does not exceed the orthographic projection of the film layer close to the array substrate on the array substrate.
The display device according to claim 16, wherein the display panel comprises a cathode layer located on a side of the light-emitting functional layer away from the array substrate;

Wherein, the cathode layer covers the end surface of the light-emitting functional unit and is in direct contact with the pixel definition layer.