CN114038894A - Display substrate, preparation method thereof and display device - Google Patents

Abstract

The present disclosure provides a display substrate, including: a substrate base plate; a plurality of first pixel defining parts disposed on the substrate base; the second pixel limiting parts are arranged on one sides of the first pixel limiting parts, which are far away from the substrate base plate; the plurality of second pixel limiting parts and the plurality of first pixel limiting parts are arranged in a crossed manner; a plurality of third pixel limiting parts, wherein part of the first pixel limiting parts are provided with the third pixel limiting parts, and the orthographic projection of two adjacent third pixel limiting parts on the substrate is separated by the orthographic projection of at least one first pixel limiting part on the substrate; the plurality of third pixel limiting parts extend along the first direction and are arranged at intervals in the second direction; wherein, the orthographic projection of the first pixel limiting part on the substrate covers the orthographic projection of the third pixel limiting part on the substrate, which is positioned above the first pixel limiting part. The disclosure also provides a preparation method of the display substrate and a display device.

Description

Display substrate, preparation method thereof and display device

Technical Field

The disclosure relates to the technical field of display, and in particular to a display substrate, a manufacturing method thereof and a display device.

Background

When a current flows through an Organic Light-Emitting diode (OLED), holes generated at an anode and electrons generated at a cathode are recombined at a Light-Emitting layer and emit Light, and photons with different energies can be emitted according to different excitation energies, so that Light with different colors can be emitted. The organic light-emitting display panel using the OLED device as a display material has the advantages of self-luminescence, wide viewing angle, high contrast and the like, is widely applied to products such as mobile phones, televisions, notebook computers and the like, and is a research focus of numerous scholars at home and abroad at present due to the characteristics of light weight, thin thickness and bending resistance.

Disclosure of Invention

The present disclosure is directed to at least one of the technical problems in the prior art, and provides a display substrate, a method for manufacturing the same, and a display device.

To achieve the above object, in a first aspect, an embodiment of the present disclosure provides a display substrate, including:

a substrate base plate;

a plurality of first pixel defining parts disposed on the substrate base plate; the plurality of first pixel limiting parts extend along a first direction and are arranged at intervals in a second direction;

the plurality of second pixel limiting parts are arranged on one side of the plurality of first pixel limiting parts, which is far away from the substrate base plate; the plurality of second pixel defining parts extend along the second direction and are arranged at intervals in the first direction; the plurality of second pixel defining parts are arranged to intersect with the plurality of first pixel defining parts;

a plurality of third pixel limiting parts, wherein part of the first pixel limiting parts are provided with the third pixel limiting parts, and the orthographic projection of two adjacent third pixel limiting parts on the substrate is separated by the orthographic projection of at least one first pixel limiting part on the substrate; the plurality of third pixel defining parts extend along the first direction and are arranged at intervals in the second direction; wherein the content of the first and second substances,

the orthographic projection of the first pixel defining part on the substrate covers the orthographic projection of the third pixel defining part on the substrate.

In some embodiments, the width between the edges of the first pixel defining section on the same side in the second direction and the third pixel defining section on the first pixel defining section on the substrate is greater than or equal to 10 μm for an orthographic projection of the first pixel defining section on the substrate and an orthographic projection of the third pixel defining section on the first pixel defining section on the substrate.

In some embodiments, for an orthographic projection of the first pixel defining section on the substrate base plate and an orthographic projection of the third pixel defining section located above the first pixel defining section on the substrate base plate, center lines thereof in the first direction coincide with each other.

In some embodiments, the orthographic projections of two adjacent third pixel defining parts on the substrate are spaced by at least n orthographic projections of the first pixel defining parts on the substrate, wherein n is a positive integer and is greater than or equal to 14.

In some embodiments, the display substrate further comprises:

a first electrode layer disposed on the substrate base plate, including a plurality of first electrodes; the first pixel defining portion is disposed between adjacent two of the first electrodes;

the light-emitting layer is arranged on one side, away from the substrate, of the first electrode layer and comprises a light-emitting material; the light-emitting materials of the same color are arranged between two adjacent second pixel limiting parts, and the light-emitting materials cover the first pixel limiting parts between the two adjacent second pixel limiting parts.

In some embodiments, the display substrate further comprises:

a second electrode layer disposed on a side of the plurality of first pixel defining parts, the plurality of second pixel defining parts, and the light emitting layer facing away from the substrate;

and the packaging layer is arranged on one side of the second electrode layer, which is far away from the substrate base plate.

In a second aspect, an embodiment of the present disclosure further provides a display device, including: a display substrate as claimed in any one of the preceding embodiments.

In a third aspect, an embodiment of the present disclosure further provides a method for manufacturing a display substrate, including:

forming a plurality of first pixel defining parts on a substrate; the plurality of first pixel limiting parts extend along a first direction and are arranged at intervals in a second direction;

forming a plurality of second pixel defining portions on the base substrate; wherein the plurality of second pixel defining portions extend in the second direction and are disposed at intervals in the first direction; the plurality of second pixel defining parts are arranged to intersect with the plurality of first pixel defining parts;

forming a plurality of third pixel defining portions on a portion of the first pixel defining portions; wherein the orthographic projections of two adjacent third pixel limiting parts on the substrate are separated by the orthographic projection of at least one first pixel limiting part on the substrate; the plurality of third pixel defining parts extend along the first direction and are arranged at intervals in the second direction; the orthographic projection of the first pixel defining part on the substrate covers the orthographic projection of the third pixel defining part on the substrate.

In some embodiments, the method further comprises:

forming a first electrode layer on the substrate base plate; wherein the first electrode layer comprises a plurality of first electrodes; the first pixel defining portion is disposed between adjacent two of the first electrodes;

after forming a plurality of third pixel defining portions on part of the first pixel defining portions, further comprising:

printing a light-emitting layer on one side of the first electrode layer, which is far away from the substrate; the light emitting layer includes a light emitting material; the light-emitting materials of the same color are arranged between two adjacent second pixel limiting parts, and the light-emitting materials cover the first pixel limiting parts between the two second pixel limiting parts.

In some embodiments, after printing the light emitting layer on the side of the first electrode layer facing away from the substrate, the method further comprises:

forming a second electrode layer on the first pixel limiting parts, the second pixel limiting parts and the side of the light-emitting layer, which is far away from the substrate, to obtain a light-emitting device;

and packaging the light-emitting device.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure and not to limit the disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:

fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the disclosure;

fig. 2 is a schematic structural diagram of another display substrate provided in the embodiment of the present disclosure;

fig. 3 is a flowchart of a method for manufacturing a display substrate according to an embodiment of the disclosure;

fig. 4 is a flowchart of another method for manufacturing a display substrate according to an embodiment of the disclosure.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present disclosure, the following describes the display substrate provided in the present disclosure, the manufacturing method thereof, and the display device in detail with reference to the accompanying drawings.

Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but which may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element, component, or module discussed below could be termed a second element, component, or module without departing from the teachings of the present disclosure.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the disclosure. As shown in fig. 1, the display substrate includes: a substrate (not shown), a plurality of first pixel defining parts 1, a plurality of second pixel defining parts 2, and a plurality of third pixel defining parts 3.

Wherein a plurality of first pixel defining parts 1 are disposed on a substrate, extending in a first direction, and spaced apart in a second direction, the first direction and the second direction intersecting, with BB 'as the first direction and AA' as the second direction in fig. 1, and in some embodiments, the first direction and the second direction may be a row direction and a column direction, respectively.

The plurality of second pixel limiting parts 2 are arranged on one side of the plurality of first pixel limiting parts 1, which is far away from the substrate, extend along the second direction and are arranged at intervals in the first direction; the second pixel limiting part 2 is crossed with the first pixel limiting part 1;

for the plurality of third pixel limiting parts 3, the third pixel limiting parts 3 are arranged on part of the first pixel limiting parts 1, and the orthographic projections of two adjacent third pixel limiting parts 3 on the substrate are separated by the orthographic projection of at least one first pixel limiting part 1 on the substrate; the plurality of third pixel limiting parts extend along the first direction and are arranged at intervals in the second direction; wherein the orthographic projection of the first pixel defining part 1 on the substrate covers the orthographic projection of the third pixel defining part 3 positioned above the first pixel defining part 1 on the substrate, i.e. in the second direction, the width of the third pixel defining part 3 is smaller than that of the first pixel defining part 1.

In some embodiments, as shown in FIG. 1, for an orthographic projection of the first pixel defining part 1 on the substrate base and an orthographic projection of the third pixel defining part 3 located above the first pixel defining part 1 on the substrate base, a width (identified as aa' in the figure) between edges of both located on the same side in the second direction is greater than or equal to 10 μm; wherein, a certain width is reserved on both sides of the third pixel limiting part 3, so that the ink film formation in the reserved area is not affected, and then the film formation state and the film formation uniformity on both sides of the third pixel limiting part 3 can be ensured.

In some embodiments, on the basis of reserving a certain transition area between the edge of the first pixel defining part 1 and the edge of the third pixel defining part 3, as shown in fig. 1, for the orthographic projection of the first pixel defining part 1 on the substrate and the orthographic projection of the third pixel defining part 3 located above the first pixel defining part 1 on the substrate, the center lines (marked by b in the figure) in the first direction, i.e. the straight lines parallel to the two side edges of the pixel defining part in the second direction and passing through the middle position of the pixel defining part in the second direction, coincide with each other. It should be noted that, for the above-mentioned arrangement mode in which the reserved width is at least 10 μm and the third pixel defining part 3 is disposed at the middle position of the corresponding first pixel defining part 1, it is only one specific optional implementation mode provided by the embodiment of the present disclosure, and other arrangement modes are also applicable to the technical solution of the embodiment of the present disclosure.

The embodiment of the disclosure provides a display substrate, which comprises a plurality of first pixel limiting parts and a plurality of second pixel limiting parts, wherein the first pixel limiting parts and the second pixel limiting parts are arranged on a substrate, the first pixel limiting parts extend along a first direction, the second pixel limiting parts extend along a second direction, the second pixel limiting parts and the first pixel limiting parts are arranged in a crossed mode and correspond to a line bank structure, ink communication among sub-pixels can be realized based on the structure, the ink volume difference among the sub-pixels is homogenized, a more uniform thin film can be obtained, and uniform light emission is realized; the display substrate also comprises a third pixel limiting part arranged on part of the first pixel limiting parts, the third pixel limiting parts extend along the first direction, the orthographic projection of two adjacent third pixel limiting parts on the substrate is separated by the orthographic projection of at least one first pixel limiting part on the substrate, and the film forming on two sides of the third pixel limiting part can be ensured not to be influenced based on the third pixel limiting parts, so that the ink film forming state of the edge sealing end position of the communicated sub-pixel is consistent with the film forming state of other positions, and the problem of uneven light emission at the edge sealing end position is avoided.

Fig. 2 is a schematic structural diagram of another display substrate according to an embodiment of the disclosure. As shown in fig. 2, the structure is based on the structure shown in fig. 1, and the display substrate further includes: a first electrode layer (not shown in the figure) and a light-emitting layer 4.

The first electrode layer is arranged on the substrate base plate and comprises a plurality of first electrodes; the first pixel defining section 1 is disposed between adjacent two of the first electrodes.

The light-emitting layer 4 is arranged on one side of the first electrode layer, which is far away from the substrate and comprises a light-emitting material; the luminescent materials with the same color are arranged between the two adjacent second pixel limiting parts 2, and the luminescent materials cover the first pixel limiting parts 1 between the two adjacent second pixel limiting parts 2; the red light-emitting material R, the green light-emitting material G and the blue light-emitting material B are taken as examples in the figure, and correspond to the red sub-pixel, the green sub-pixel and the blue sub-pixel respectively; it should be understood that the light emitting material of this color and the corresponding sub-pixel arrangement in fig. 2 are only one specific alternative provided by the embodiments of the present disclosure, and that light emitting materials of other colors, such as white light emitting material, and other pixel arrangements are also applicable to the technical solution of the embodiments of the present disclosure.

Specifically, when the light-emitting layer 4 is connected in the second direction, that is, when the display substrate is prepared based on inkjet printing, the inks of the sub-pixels in each row of the same-color sub-pixels are connected, if the sub-pixels arranged side by side in the second direction and connected are a pixel group of the same color, the pixel group is located between two adjacent second pixel defining parts 2, covering the first pixel defining part 1 between the two adjacent second pixel defining parts 2, and the third pixel defining part 3 separates the pixel groups in the same row.

It should be understood that in order to clearly represent the relative position relationship of the above layers of the display substrate, the portion of the light-emitting layer 4 covering the first pixel defining part 1, i.e. the communicating portion between the two sub-pixels, is represented by a region having a certain transparency in fig. 2.

In some embodiments, the first pixel defining portion 1 and the second pixel defining portion 2 are both made of organic materials, wherein the second pixel defining portion 2 is made of lyophobic materials, and the first pixel defining portion 1 is made of lyophilic materials.

In some embodiments, the thickness of the first pixel defining part 1 is less than the thickness of the second pixel defining part 2; specifically, the first pixel defining part 1 covers the edge of each first electrode to prevent electric leakage, and the first pixel defining part 1 can define a light emitting region; the specific embodiment of the communication between the sub-pixels of the same color in each column can be realized based on the first pixel defining part 1 with smaller thickness.

Specifically, the number of connected sub-pixels is associated with a film formation state, that is, an ink film formation state of the sub-pixels, which can be embodied in terms of film formation uniformity; because the same-color sub-pixels of each row are communicated with each other, the ink volume difference among the sub-pixels can be homogenized, and the nonuniformity of film forming thickness among the sub-pixels is avoided, so that a more uniform film is obtained; if the sub-pixels connected in the same column are a pixel group of the same color, when the number of the connected sub-pixels, that is, the number of the sub-pixels in the pixel group reaches a certain value, in particular, after the number of the sub-pixels in the pixel group reaches 15, the number of the sub-pixels in the pixel group continues to increase, and the film formation uniformity of each sub-pixel is almost unchanged. In correspondence with the above theory, in some embodiments, the orthographic projections of two adjacently disposed third pixel defining parts 3 on the substrate are separated by at least n orthographic projections of the first pixel defining parts 1 on the substrate, where n is a positive integer and n is greater than or equal to 14; that is, at least 15 sub-pixels of the same color and in the same column are arranged between two adjacent third pixel defining parts 3.

In some embodiments, the display substrate further comprises: a second electrode layer arranged at one side of the first pixel limiting parts 1, the second pixel limiting parts 2 and the light-emitting layer 4 which are far away from the substrate; the packaging layer is arranged on one side, away from the substrate, of the second electrode layer; the first electrode layer, the light emitting layer and the second electrode layer constitute a light emitting device; in some embodiments, the first electrode layer and the first electrode may be referred to as an anode, and the second electrode layer may be referred to as a cathode; in some embodiments, the light emitting device is an OLED device, and further includes other organic functional layers between the first electrode layer and the second electrode layer and outside the light emitting layer, such as a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, and the like.

The embodiment of the present disclosure also provides a display device, including: a display substrate as in any one of the above embodiments.

Fig. 3 is a flowchart of a method for manufacturing a display substrate according to an embodiment of the disclosure. As shown in fig. 3, the method includes:

step S1 is to form a plurality of first pixel defining parts on the base substrate.

The plurality of first pixel limiting parts extend along the first direction and are arranged at intervals in the second direction.

Step S2 is to form a plurality of second pixel defining parts on the base substrate.

The plurality of second pixel limiting parts extend along the second direction and are arranged at intervals in the first direction; the plurality of second pixel defining parts are arranged to intersect with the plurality of first pixel defining parts.

Step S3, forming a plurality of third pixel defining parts on a part of the first pixel defining parts.

Orthographic projections of two adjacent third pixel limiting parts on the substrate base plate are separated by orthographic projections of at least one first pixel limiting part on the substrate base plate; the plurality of third pixel limiting parts extend along the first direction and are arranged at intervals in the second direction; the orthographic projection of the first pixel defining part on the substrate covers the orthographic projection of the third pixel defining part on the substrate.

In some embodiments, the orthographic projections of two adjacently arranged third pixel defining parts 3 on the substrate are spaced by at least n orthographic projections of the first pixel defining parts 1 on the substrate, wherein n is a positive integer and n is greater than or equal to 14.

In some embodiments, for an orthographic projection of the first pixel defining section on the substrate base and an orthographic projection of a third pixel defining section located above the first pixel defining section on the substrate base, a width between edges of the two located on the same side in the second direction is greater than or equal to 10 μm.

In some embodiments, for an orthographic projection of the first pixel defining section on the substrate base and an orthographic projection of the third pixel defining section located above the first pixel defining section on the substrate base, center lines of the first pixel defining section and the third pixel defining section in the first direction coincide with each other.

Fig. 4 is a flowchart of another method for manufacturing a display substrate according to an embodiment of the disclosure. Specifically, the method is an embodiment alternative based on the method shown in fig. 3; as shown in fig. 4, the method includes not only steps S1 through S3 but also step S01 and, after step S3, step S4. Only step S01 and step S4 will be described in detail below.

Step S01 is to form a first electrode layer on the base substrate.

Wherein the first electrode layer comprises a plurality of first electrodes; the first pixel defining portion is disposed between adjacent two of the first electrodes.

It should be noted that, the execution sequence of step S01 and steps S1 to S3 is not limited in the embodiment of the present disclosure, that is, step S01 may be executed before step S1 to step S3, or step S01 is executed after step S1 to step S3, or step S01 and step S1 to step S3 are executed alternately, and all of them are applicable to the technical solution of the embodiment of the present disclosure.

In step S3, after the step of forming a plurality of third pixel defining parts on part of the first pixel defining parts, the method further comprises:

step S4, printing a light emitting layer on a side of the first electrode layer facing away from the substrate.

Wherein the light emitting layer comprises a light emitting material; the light-emitting materials with the same color are arranged between the two adjacent second pixel limiting parts, and the light-emitting materials cover the first pixel limiting parts between the two second pixel limiting parts.

In some embodiments, when printing the light-emitting layer on the side of the first electrode layer facing away from the substrate, further comprising performing printing of a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer.

In some embodiments, as shown in fig. 4, after the step of printing the light emitting layer on the side of the first electrode layer facing away from the substrate at step S4, the method further includes: step S5 and step S6.

Step S5, forming a second electrode layer on the first pixel defining parts, the second pixel defining parts and the light-emitting layer at a side away from the substrate to obtain a light-emitting device.

And step S6, packaging the light-emitting device.

Wherein, a light emitting device is obtained by forming the second electrode layer on the basis of the steps S1 to S4, and the vapor deposition packaging process is completed.

It will be understood by those of ordinary skill in the art that all or some of the steps of the methods disclosed above, functional modules/units in the apparatus, may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purposes of limitation. In some instances, features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics and/or elements described in connection with other embodiments, unless expressly stated otherwise, as would be apparent to one skilled in the art. Accordingly, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the disclosure as set forth in the appended claims.

Claims (10)

1. A display substrate, comprising:

a substrate base plate;

a plurality of first pixel defining parts disposed on the substrate base plate; the plurality of first pixel limiting parts extend along a first direction and are arranged at intervals in a second direction;

the plurality of second pixel limiting parts are arranged on one side of the plurality of first pixel limiting parts, which is far away from the substrate base plate; the plurality of second pixel defining parts extend along the second direction and are arranged at intervals in the first direction; the plurality of second pixel defining parts are arranged to intersect with the plurality of first pixel defining parts;

a plurality of third pixel limiting parts, wherein part of the first pixel limiting parts are provided with the third pixel limiting parts, and the orthographic projection of two adjacent third pixel limiting parts on the substrate is separated by the orthographic projection of at least one first pixel limiting part on the substrate; the plurality of third pixel defining parts extend along the first direction and are arranged at intervals in the second direction; wherein the content of the first and second substances,

the orthographic projection of the first pixel defining part on the substrate covers the orthographic projection of the third pixel defining part on the substrate.

2. The display substrate of claim 1,

the width between the edges of the first pixel defining section on the same side in the second direction is greater than or equal to 10 μm for an orthographic projection of the first pixel defining section on the substrate and an orthographic projection of the third pixel defining section on the first pixel defining section on the substrate.

3. The display substrate of claim 2,

for the orthographic projection of the first pixel defining part on the substrate and the orthographic projection of the third pixel defining part on the first pixel defining part on the substrate, the central lines in the first direction are coincident with each other.

4. The display substrate of claim 1,

orthographic projections of two adjacent third pixel limiting parts on the substrate are spaced by at least n orthographic projections of the first pixel limiting parts on the substrate, wherein n is a positive integer and is larger than or equal to 14.

5. The display substrate of claim 1, further comprising:

a first electrode layer disposed on the substrate base plate, including a plurality of first electrodes; the first pixel defining portion is disposed between adjacent two of the first electrodes;

the light-emitting layer is arranged on one side, away from the substrate, of the first electrode layer and comprises a light-emitting material; the light-emitting materials of the same color are arranged between two adjacent second pixel limiting parts, and the light-emitting materials cover the first pixel limiting parts between the two adjacent second pixel limiting parts.

6. The display substrate of claim 5, further comprising:

a second electrode layer disposed on a side of the plurality of first pixel defining parts, the plurality of second pixel defining parts, and the light emitting layer facing away from the substrate;

and the packaging layer is arranged on one side of the second electrode layer, which is far away from the substrate base plate.

7. A display device, comprising: a display substrate according to any one of claims 1 to 6.

8. A method for preparing a display substrate comprises the following steps:

forming a plurality of first pixel defining parts on a substrate; the plurality of first pixel limiting parts extend along a first direction and are arranged at intervals in a second direction;

forming a plurality of second pixel defining portions on the base substrate; wherein the plurality of second pixel defining portions extend in the second direction and are disposed at intervals in the first direction; the plurality of second pixel defining parts are arranged to intersect with the plurality of first pixel defining parts;

forming a plurality of third pixel defining portions on a portion of the first pixel defining portions; wherein the orthographic projections of two adjacent third pixel limiting parts on the substrate are separated by the orthographic projection of at least one first pixel limiting part on the substrate; the plurality of third pixel defining parts extend along the first direction and are arranged at intervals in the second direction; the orthographic projection of the first pixel defining part on the substrate covers the orthographic projection of the third pixel defining part on the substrate.

9. The method of manufacturing according to claim 8, further comprising:

forming a first electrode layer on the substrate base plate; wherein the first electrode layer comprises a plurality of first electrodes; the first pixel defining portion is disposed between adjacent two of the first electrodes;

after forming a plurality of third pixel defining portions on part of the first pixel defining portions, further comprising:

printing a light-emitting layer on one side of the first electrode layer, which is far away from the substrate; the light emitting layer includes a light emitting material; the light-emitting materials of the same color are arranged between two adjacent second pixel limiting parts, and the light-emitting materials cover the first pixel limiting parts between the two second pixel limiting parts.

10. A production method according to claim 9, wherein, after printing a light-emitting layer on a side of the first electrode layer facing away from the substrate base plate, further comprising:

forming a second electrode layer on the first pixel limiting parts, the second pixel limiting parts and the side of the light-emitting layer, which is far away from the substrate, to obtain a light-emitting device;

and packaging the light-emitting device.

Images