Display substrate and manufacturing method thereof, and display device

Abstract

The present disclosure provides a display substrate, including: a base substrate; a pixel defining layer, arranged on the base substrate, including a first accommodation portion corresponding to a first light-emitting area, a second accommodation portion corresponding to a second light-emitting area, and a third accommodation portion corresponding to a third light-emitting area; a plurality of hydrophilic-hydrophobic modification portions, arranged on the side of the pixel defining layer away from the base substrate; the hydrophilic-hydrophobic modification portion, configured to, when forming a third light-emitting material, under a first preset condition, exhibit hydrophilicity between two third accommodation portions connected thereto, and exhibit hydrophobicity between two first accommodation portions or two second accommodation portions connected thereto; when forming a first light-emitting material and a second light-emitting material, under a second preset condition, exhibit hydrophobicity between two third accommodation portions connected thereto, and exhibit hydrophilicity between two first accommodation portions or two second accommodation portions connected thereto. The present disclosure also provides a display device and a method for preparing a display substrate.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display substrate and a preparation method thereof, and a display device. Background Art

[0002] When an electric current flows through an organic light-emitting diode (OLED), the holes generated by the anode and the electrons generated by the cathode recombine in the light-emitting layer and release light. Depending on the excitation energy, photons of different energies can be emitted, corresponding to light of different colors. Organic light-emitting display panels using OLED devices as display materials have the advantages of self-luminescence, wide viewing angle, and high contrast. They are widely used in smart products such as mobile phones, televisions, and laptops. Due to their light weight, thin thickness, and anti-bending properties, they are currently the research focus of many scholars at home and abroad. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and proposes a display substrate and a preparation method thereof, and a display device.

[0004] To achieve the above objectives, in a first aspect, an embodiment of the present disclosure provides a display substrate, including:

[0005] A substrate, which is divided into a pixel pattern area, wherein the pixel pattern area includes a plurality of first light-emitting areas, a plurality of second light-emitting areas and a plurality of third light-emitting areas; the first light-emitting areas and the second light-emitting areas are alternately arranged along a first direction to form a first light-emitting row; a plurality of the third light-emitting areas arranged side by side along the first direction form a second light-emitting row; the first light-emitting row and the second light-emitting row are alternately arranged in a second direction; a plurality of the first light-emitting areas arranged side by side along the second direction form a first light-emitting column, a plurality of the second light-emitting areas arranged side by side along the second direction form a second light-emitting column, and a plurality of the third light-emitting areas arranged side by side along the second direction form a third light-emitting column; a third light-emitting column is arranged between adjacent first light-emitting columns and second light-emitting columns; the second light-emitting row is arranged crosswise with the first light-emitting column and the second light-emitting column to define a plurality of connection areas;

[0006] A pixel defining layer is provided on the base substrate, and includes a first accommodating portion corresponding to the first light-emitting area, a second accommodating portion corresponding to the second light-emitting area, and a third accommodating portion corresponding to the third light-emitting area; the first accommodating portion is used to accommodate a first light-emitting material, the second accommodating portion is used to accommodate a second light-emitting material, and the third accommodating portion is used to accommodate a third light-emitting material;

[0007] A plurality of hydrophilic and hydrophobic modification parts are arranged on a side of the pixel defining layer away from the base substrate, and one hydrophilic and hydrophobic modification part is arranged in one connection area;

[0008] The lyophilic-lyophobic modified portion is configured to, when forming the third luminescent material, exhibit lyophilicity between two third containers connected thereto, and exhibit lyophobicity between two first containers connected thereto or two second containers connected thereto under a first preset condition; when forming the first luminescent material and the second luminescent material, exhibit lyophobicity between two third containers connected thereto, and exhibit lyophilicity between two first containers connected thereto or two second containers connected thereto under a second preset condition.

[0009] In some embodiments, the hydrophilic-lyophobic modified portion includes: a first modified portion and a second modified portion stacked in sequence; the first modified portion is connected to the first accommodating portion or the second accommodating portion in the second direction, and both ends thereof in the second direction extend to the first accommodating portion or the second accommodating portion connected thereto; the second modified portion is connected to the third accommodating portion in the first direction, and both ends thereof in the first direction extend to the third accommodating portion connected thereto;

[0010] The first modified portion is configured to be liquid-repellent under the first preset condition when forming the third luminescent material; and to be liquid-philic under the second preset condition when forming the first luminescent material and the second luminescent material;

[0011] The second modified portion is configured to exhibit lyophilicity under the first preset condition when forming the third luminescent material; and to exhibit lyophobicity under the second preset condition when forming the first luminescent material and the second luminescent material.

[0012] In some embodiments, the hydrophilic-lyophobic modification portion is made of a temperature-sensitive material;

[0013] The first modified portion is configured to respond to temperature control, and when forming the third luminescent material, at a first temperature, exhibits liquid repellency; when forming the first luminescent material and the second luminescent material, at a second temperature, exhibits liquid affinity;

[0014] The second modified portion is configured to respond to temperature control and exhibit lyophilicity at the first temperature when forming the third luminescent material; and exhibit lyophobicity at the second temperature when forming the first luminescent material and the second luminescent material.

[0015] In some embodiments, the pixel defining layer includes: a first sub-pixel defining layer and a second sub-pixel defining layer; the first sub-pixel defining layer is arranged on the base substrate, and the second sub-pixel defining layer is arranged on the side of the first sub-pixel defining layer away from the base substrate; the thickness of the first sub-pixel defining layer is less than the thickness of the second sub-pixel defining layer.

[0016] In some embodiments, the display substrate further comprises:

[0017] A first electrode layer is disposed on the base substrate and located in the pixel pattern area, and includes a plurality of first electrodes; one first electrode corresponds to one light-emitting area;

[0018] The light-emitting layer is arranged on a side of the first electrode layer away from the base substrate, and includes the first light-emitting material, the second light-emitting material and the third light-emitting material.

[0019] In some embodiments, the display substrate further comprises:

[0020] A second electrode layer is disposed on a side of the pixel defining layer and the light emitting layer away from the base substrate;

[0021] The encapsulation layer is arranged on a side of the second electrode layer away from the base substrate.

[0022] In a second aspect, an embodiment of the present disclosure further provides a display device, comprising: a display substrate as described in any one of the above embodiments.

[0023] In a third aspect, the present disclosure also provides a method for preparing a display substrate, comprising:

[0024] A first electrode layer is formed on a base substrate; wherein the base substrate is divided into a pixel pattern area, the pixel pattern area includes a plurality of first light-emitting areas, a plurality of second light-emitting areas and a plurality of third light-emitting areas; the first light-emitting areas and the second light-emitting areas are alternately arranged along a first direction to form a first light-emitting row; the plurality of third light-emitting areas arranged side by side along the first direction form a second light-emitting row; the first light-emitting row and the second light-emitting row are alternately arranged in a second direction; the plurality of first light-emitting areas arranged side by side along the second direction form a first light-emitting column, the plurality of second light-emitting areas arranged side by side along the second direction form a second light-emitting column, and the plurality of third light-emitting areas arranged side by side along the second direction form a third light-emitting column; one third light-emitting column is arranged between adjacent first light-emitting columns and second light-emitting columns; the second light-emitting row is arranged crosswise with the first light-emitting column and the second light-emitting column to define a plurality of connection areas; the first electrode layer is located in the pixel pattern area, and includes a plurality of first electrodes; one first electrode corresponds to one light-emitting area;

[0025] forming a pixel defining layer on the base substrate; wherein the pixel defining layer comprises a first accommodating portion corresponding to the first light emitting area, a second accommodating portion corresponding to the second light emitting area, and a third accommodating portion corresponding to the third light emitting area;

[0026] A plurality of hydrophilic-hydrophobic modified portions are formed on a side of the pixel defining layer away from the base substrate; wherein one hydrophilic-hydrophobic modified portion is provided in one connection area;

[0027] Printing a light-emitting layer on a side of the first electrode layer away from the base substrate, wherein the first light-emitting material is formed in the first receiving portion, the second light-emitting material is formed in the second receiving portion, and the third light-emitting material is formed in the third receiving portion;

[0028] Among them, when forming the third luminescent material, under the first preset condition, the hydrophilic-lyophobic modified part is lyophilic between the two third containers connected to it, and is hydrophobic between the two first containers or the two second containers connected to it; when forming the first luminescent material and the second luminescent material, under the second preset condition, the hydrophilic-lyophobic modified part is hydrophobic between the two third containers connected to it, and is hydrophilic between the two first containers or the two second containers connected to it.

[0029] In some embodiments, forming a plurality of hydrophilic-hydrophobic modified portions on a side of the pixel defining layer away from the base substrate includes:

[0030] forming a first modified portion and a second modified portion which are sequentially stacked;

[0031] The first modified portion is connected to the first accommodating portion or the second accommodating portion in the second direction, and both ends thereof in the second direction extend to the first accommodating portion or the second accommodating portion connected thereto; the second modified portion is connected to the third accommodating portion in the first direction, and both ends thereof in the first direction extend to the third accommodating portion connected thereto;

[0032] Among them, when forming the third light-emitting material, under the first preset condition, the first modified portion is liquid-repellent and the second modified portion is liquid-philic; when forming the first light-emitting material and the second light-emitting material, under the second preset condition, the first modified portion is liquid-philic and the second modified portion is liquid-repellent.

[0033] In some embodiments, the hydrophilic-lyophobic modification portion is made of a temperature-sensitive material;

[0034] In response to temperature control, when forming the third light-emitting material, at a first temperature, the first modified portion exhibits liquid repellency and the second modified portion exhibits liquid affinity; when forming the first light-emitting material and the second light-emitting material, at a second temperature, the first modified portion exhibits liquid affinity and the second modified portion exhibits liquid repellency.

[0035] In some embodiments, the pixel defining layer includes: a first sub-pixel defining layer and a second sub-pixel defining layer;

[0036] The step of forming a pixel defining layer on a substrate comprises:

[0037] forming a first sub-pixel defining layer on the base substrate;

[0038] forming a second sub-pixel defining layer on a side of the first sub-pixel defining layer away from the base substrate;

[0039] The thickness of the first sub-pixel defining layer is smaller than the thickness of the second sub-pixel defining layer.

[0040] In some embodiments, after printing the light-emitting layer on the side of the first electrode layer facing away from the base substrate, the method further includes:

[0041] forming a second electrode layer on the second pixel defining layer and the side of the light emitting layer away from the base substrate to obtain a light emitting device;

[0042] The light emitting device is packaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing detailed example embodiments with reference to the accompanying drawings, in which:

[0044] Figure 1 A schematic structural diagram of a display substrate provided in an embodiment of the present disclosure;

[0045] Figure 2 A schematic diagram of the structure of a hydrophilic-lyophobic modification portion provided in an embodiment of the present disclosure;

[0046] Figure 3 A schematic structural diagram of another display substrate provided in an embodiment of the present disclosure;

[0047] Figure 4 A flow chart of a method for preparing a display substrate provided in an embodiment of the present disclosure;

[0048] Figure 5A flow chart of another method for preparing a display substrate provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the display substrate and its preparation method, and the display device provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0050] Example embodiments will be described more fully below with reference to the accompanying drawings, but the example embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to enable those skilled in the art to fully understand the scope of the present disclosure.

[0051] The terms used herein are only used to describe specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, the presence of the features, wholes, steps, operations, elements and / or components is specified, but the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof is not excluded.

[0052] 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 to these terms. These terms are only used to distinguish one element from another element. Therefore, without departing from the teachings of the present disclosure, the first element, first component, or first module discussed below may be referred to as the second element, second component, or second module.

[0053] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted as having an idealized or overly formal meaning unless explicitly defined as such herein.

[0054] Figure 1 FIG. 1 is a schematic diagram of a display substrate provided in an embodiment of the present disclosure. Figure 1 As shown, the display substrate includes: a base substrate (not shown in the figure), a pixel defining layer 2 and a plurality of hydrophilic and hydrophobic modification parts 3.

[0055] in, Figure 1In the figure, BB' is used as the first direction and AA' is used as the second direction; the substrate is divided into a pixel pattern area, and the pixel pattern area includes a plurality of first light-emitting areas 101, a plurality of second light-emitting areas 102 and a plurality of third light-emitting areas 103; the first light-emitting areas 101 and the second light-emitting areas 102 are alternately arranged along the first direction to form a first light-emitting row 11; a plurality of third light-emitting areas 103 arranged side by side along the first direction form a second light-emitting row 12; the first light-emitting row 11 and the second light-emitting row 12 are alternately arranged in the second direction; a plurality of first light-emitting areas 101 arranged side by side along the second direction form a first light-emitting column 13, a plurality of second light-emitting areas 102 arranged side by side along the second direction form a second light-emitting column 14, and a plurality of third light-emitting areas 103 arranged side by side along the second direction form a third light-emitting column 15; a third light-emitting column 15 is arranged between adjacent first light-emitting columns 13 and second light-emitting columns 14; the second light-emitting row 12 is arranged crosswise with the first light-emitting column 13 and the second light-emitting column 14 to define a plurality of connection areas 16. Figure 1 , a part of the pixel pattern area is shown by way of example. It can be understood that it reflects the positional relationship and corresponding arrangement between the first light-emitting area 101, the second light-emitting area 102, the third light-emitting area 103, the first light-emitting row 11, the second light-emitting row 12, the first light-emitting column 13, the second light-emitting column 14, and the third light-emitting column 15, and the size relationship and number of each area are not limited. Therefore, based on the arrangement of the first light-emitting area 101, the second light-emitting area 102, and the third light-emitting area 103, compared with the solutions in the related art, the arrangement in the embodiment of the present disclosure can make full use of the non-display area in the pixel pattern area to increase the display resolution.

[0056] The pixel defining layer 2 is arranged on the base substrate, and includes a first accommodating portion 201 corresponding to the first light-emitting area 101, a second accommodating portion 202 corresponding to the second light-emitting area 102, and a third accommodating portion 203 corresponding to the third light-emitting area 103; the first accommodating portion 201 is used to accommodate the first light-emitting material, the second accommodating portion 202 is used to accommodate the second light-emitting material, and the third accommodating portion 203 is used to accommodate the third light-emitting material.

[0057] In some embodiments, the pixel defining layer 2 includes: a first sub-pixel defining layer and a second sub-pixel defining layer; the first sub-pixel defining layer is arranged on the base substrate, and the second sub-pixel defining layer is arranged on the side of the first sub-pixel defining layer away from the base substrate; the thickness of the first sub-pixel defining layer is less than the thickness of the second sub-pixel defining layer.

[0058] In some embodiments, both the first pixel defining layer and the second pixel defining layer are made of organic materials; in some embodiments, the second pixel defining layer is made of a lyophobic material and the first pixel defining layer is made of a lyophilic material. Thus, for any one of the first, second and third luminescent areas, it is possible to achieve that after the luminescent material is formed, on the basis of ink interconnection based on the lyophilic-lyophobic modified portion, it can also be connected in the second direction based on the first pixel defining layer, corresponding to a line bank structure, thereby improving film formation uniformity.

[0059] A plurality of hydrophilic-lyophobic modifying portions 3 are disposed on a side of the pixel defining layer 2 facing away from the base substrate, and one hydrophilic-lyophobic modifying portion 3 is disposed in one connection region 16 .

[0060] The lyophilic-lyophobic modification portion 3 is configured to, when forming the third luminescent material, exhibit lyophilicity between the two third containers 203 connected thereto, and exhibit lyophobicity between the two first containers 201 or the two second containers 202 connected thereto under a first preset condition; when forming the first luminescent material and the second luminescent material, exhibit lyophobicity between the two third containers 203 connected thereto, and exhibit lyophilicity between the two first containers 201 or the two second containers 202 connected thereto under a second preset condition.

[0061] The embodiment of the present disclosure provides a display substrate, which includes a pixel defining layer arranged on a base substrate, and a hydrophilic-hydrophobic modification portion arranged in a connection area, the connection area corresponds to the intersection of a second light-emitting row and a first light-emitting column and a second light-emitting column; the hydrophilic-hydrophobic modification portion is configured to exhibit hydrophilicity in a first direction and hydrophobicity in a second direction when forming a third light-emitting material, and to exhibit hydrophobicity in the first direction and hydrophilicity in the second direction when forming a first light-emitting material and a second light-emitting material; it corresponds to a line bank structure, and based on the hydrophilic-hydrophobic modification portion, the third light-emitting material can be connected in the first direction, and the first light-emitting material and the second light-emitting material can be connected in the second direction, and the ink volume difference between each light-emitting area is averaged to obtain a more uniform film and achieve uniform light emission.

[0062] Figure 2 Schematic diagram of the structure of a hydrophilic-lyophobic modification part provided in an embodiment of the present disclosure. Figure 2As shown, in some embodiments, for the above-mentioned hydrophilic-liquid modification section 3, it includes a first modification section 301 and a second modification section 302 which are stacked in sequence; the first modification section 301 is connected to the first accommodating section 201 or the second accommodating section 202 in the second direction, and both ends thereof in the second direction extend to the first accommodating section 201 or the second accommodating section 202 connected thereto; the second modification section 302 is connected to the third accommodating section 203 in the first direction, and both ends thereof in the first direction extend to the third accommodating section 203 connected thereto.

[0063] The first modified portion 301 is configured to be lyophobic under a first preset condition when forming the third luminescent material, and to be lyophilic under a second preset condition when forming the first luminescent material and the second luminescent material. The second modified portion 302 is configured to be lyophilic under a first preset condition when forming the third luminescent material, and to be lyophobic under a second preset condition when forming the first luminescent material and the second luminescent material.

[0064] In some embodiments, the hydrophilic-lyophobic modification part 3 uses a temperature-sensitive material. The first modification part 301 is configured to respond to temperature control, and when forming the third luminescent material, at a first temperature, it is hydrophobic; when forming the first luminescent material and the second luminescent material, it is hydrophilic. The second modification part 302 is configured to respond to temperature control, and when forming the third luminescent material, at a first temperature, it is hydrophilic; when forming the first luminescent material and the second luminescent material, at a second temperature, it is hydrophobic. Thus, the hydrophilic-lyophobic characteristics of the hydrophilic-lyophobic modification part can be controlled based on temperature regulation, so as to realize the connection of the first luminescent material, the second luminescent material and the third luminescent material in their corresponding directions.

[0065] In some embodiments, the lyophilic-lyophobic modification part 3 may be made of polynitrogen-isopropylacrylamide (PNIPAM) material.

[0066] Figure 3 FIG. 1 is a schematic diagram of another display substrate provided in an embodiment of the present disclosure. Figure 3 As shown, the display substrate further includes: a first electrode layer (not shown in the figure) and a light-emitting layer 4.

[0067] The first electrode layer is arranged on the base substrate and is located in the pixel pattern area, including a plurality of first electrodes; one first electrode corresponds to one light-emitting area. The light-emitting layer 4 is arranged on the side of the first electrode layer away from the base substrate, including a first light-emitting material, a second light-emitting material and a third light-emitting material.

[0068] In some embodiments, Figure 3As shown, the first luminescent material is a blue luminescent material B, the second luminescent material is a green luminescent material G, and the third luminescent material is a red luminescent material R. Based on the above arrangement, for the adjacent first luminescent area 101, the second luminescent area 102, and the third luminescent area 103, a pixel unit can be formed by 1 / 2 of the red luminescent material R, 1 / 4 of the blue luminescent material B, and 1 / 4 of the green luminescent material G (e.g. Figure 3 In some embodiments, Figure 3 As shown, the first light emitting area 101, the second light emitting area 102, and the third light emitting area 103 are as follows Figure 3 The regular pattern shown, based on the corresponding size configuration, the pixel unit is a rectangle, and can also be specifically a square. The corresponding preparation method is more applicable and convenient for mass production.

[0069] In some embodiments, the display substrate further includes: a second electrode layer and an encapsulation layer; wherein the second electrode layer is disposed on the side of the pixel defining layer 2 and the light emitting layer 4 away from the substrate; and the encapsulation layer is disposed on the side of the second electrode layer away from the substrate. 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 can be referred to as an anode, and the second electrode layer can be referred to as a cathode; in some embodiments, the light emitting device is an OLED device, and other organic functional layers are included between the first electrode layer and the second electrode layer in addition to the light emitting layer, such as a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer.

[0070] An embodiment of the present disclosure further provides a display device, comprising: a display substrate as described in any of the above embodiments.

[0071] Figure 4 The flowchart of a method for preparing a display substrate provided by an embodiment of the present disclosure is as follows. Figure 4 As shown, the method includes:

[0072] Step S1, forming a first electrode layer on a base substrate.

[0073] Among them, the base substrate is divided into a pixel pattern area, the pixel pattern area includes multiple first light-emitting areas, multiple second light-emitting areas and multiple third light-emitting areas; the first light-emitting areas and the second light-emitting areas are alternately arranged along the first direction to form a first light-emitting row; multiple third light-emitting areas arranged side by side along the first direction constitute a second light-emitting row; the first light-emitting row and the second light-emitting row are alternately arranged in the second direction; multiple first light-emitting areas arranged side by side along the second direction constitute a first light-emitting column, multiple second light-emitting areas arranged side by side along the second direction constitute a second light-emitting column, and multiple third light-emitting areas arranged side by side along the second direction constitute a third light-emitting column; a third light-emitting column is arranged between adjacent first light-emitting columns and second light-emitting columns; the second light-emitting row is cross-arranged with the first light-emitting column and the second light-emitting column to define multiple connection areas; the first electrode layer is located in the pixel pattern area, including multiple first electrodes; one first electrode corresponds to one light-emitting area.

[0074] Step S2: forming a pixel defining layer on the base substrate.

[0075] The pixel defining layer includes a first accommodating portion corresponding to the first light emitting area, a second accommodating portion corresponding to the second light emitting area, and a third accommodating portion corresponding to the third light emitting area.

[0076] Step S3, forming a plurality of hydrophilic-hydrophobic modified portions on the side of the pixel defining layer facing away from the base substrate.

[0077] Among them, a connection area is provided with a hydrophilic-hydrophobic modification part.

[0078] Step S4, printing a light-emitting layer on the side of the first electrode layer facing away from the base substrate, wherein a first light-emitting material is formed in the first receiving portion, a second light-emitting material is formed in the second receiving portion, and a third light-emitting material is formed in the third receiving portion.

[0079] Among them, when forming the third luminescent material, under the first preset condition, the hydrophilic-hydrophobic modified part exhibits lyophilicity between the two third containers connected to it, and exhibits lyophobicity between the two first containers or the two second containers connected to it; when forming the first luminescent material and the second luminescent material, under the second preset condition, the hydrophilic-hydrophobic modified part exhibits lyophobicity between the two third containers connected to it, and exhibits lyophilicity between the two first containers or the two second containers connected to it.

[0080] In some embodiments, when the light-emitting layer is printed on the side of the first electrode layer facing away from the base substrate, the hole injection layer, the hole transport layer, the electron injection layer and the electron transport layer are also printed.

[0081] Figure 5 A flow chart of another method for preparing a display substrate provided by an embodiment of the present disclosure. Figure 5As shown, step S3, the step of forming a plurality of hydrophilic and hydrophobic modified portions on the side of the pixel defining layer away from the base substrate, includes: step S301.

[0082] Step S301: forming a first modified portion and a second modified portion which are stacked in sequence.

[0083] Among them, the first modified part is connected to the first accommodating part or the second accommodating part in the second direction, and its two ends in the second direction extend to the first accommodating part or the second accommodating part connected thereto; the second modified part is connected to the third accommodating part in the first direction, and its two ends in the first direction extend to the third accommodating part connected thereto.

[0084] Among them, when forming the third luminescent material, under the first preset condition, the first modified part exhibits liquid repellency and the second modified part exhibits liquid affinity; when forming the first luminescent material and the second luminescent material, under the second preset condition, the first modified part exhibits liquid affinity and the second modified part exhibits liquid repellency.

[0085] In some embodiments, the hydrophilic-lyophobic modified portion is made of a temperature-sensitive material. In response to temperature control, when forming the third luminescent material, at a first temperature, the first modified portion exhibits hydrophobicity and the second modified portion exhibits hydrophilicity; when forming the first luminescent material and the second luminescent material, at a second temperature, the first modified portion exhibits hydrophilicity and the second modified portion exhibits hydrophobicity.

[0086] In some embodiments, the pixel defining layer includes: a first sub-pixel defining layer and a second sub-pixel defining layer; Figure 5 As shown, specifically, step S2, the step of forming a pixel defining layer on the base substrate, includes: step S201 and step S202.

[0087] Step S201: forming a first sub-pixel defining layer on a base substrate.

[0088] Step S202 : forming a second sub-pixel defining layer on a side of the first sub-pixel defining layer away from the base substrate.

[0089] Wherein, the thickness of the first sub-pixel defining layer is smaller than the thickness of the second sub-pixel defining layer.

[0090] In some embodiments, Figure 5 As shown, after the step S4 of printing the light-emitting layer on the side of the first electrode layer facing away from the base substrate, the method further includes: step S5 and step S6.

[0091] Step S5, forming a second electrode layer on the side of the second pixel defining layer and the light emitting layer facing away from the base substrate to obtain a light emitting device.

[0092] Step S6: packaging the light-emitting device.

[0093] Wherein, on the basis of the above steps S1 to S4, a second electrode layer is formed to obtain a light-emitting device, and the evaporation packaging process is completed.

[0094] It will be appreciated by those skilled in the art that all or some of the steps in the method disclosed above, the functional modules / units in the device may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are 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 tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain 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 may include any information delivery media.

[0095] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for limiting purposes. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly noted, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, those skilled in the art will appreciate that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A display substrate, wherein: include: A base substrate, which is divided into a pixel pattern area, wherein the pixel pattern area includes a plurality of first light-emitting areas, a plurality of second light-emitting areas, and a plurality of third light-emitting areas; The first light-emitting areas and the second light-emitting areas are alternately arranged along the first direction to form a first light-emitting row; the plurality of the third light-emitting areas arranged side by side along the first direction form a second light-emitting row; the first light-emitting row and the second light-emitting row are alternately arranged in the second direction; the plurality of the first light-emitting areas arranged side by side along the second direction form a first light-emitting column, the plurality of the second light-emitting areas arranged side by side along the second direction form a second light-emitting column, and the plurality of the third light-emitting areas arranged side by side along the second direction form a third light-emitting column; one third light-emitting column is arranged between adjacent first light-emitting columns and second light-emitting columns; the second light-emitting row is arranged to cross the first light-emitting column and the second light-emitting column to define a plurality of connection areas; A pixel defining layer is provided on the base substrate, and includes a first accommodating portion corresponding to the first light-emitting area, a second accommodating portion corresponding to the second light-emitting area, and a third accommodating portion corresponding to the third light-emitting area; the first accommodating portion is used to accommodate a first light-emitting material, the second accommodating portion is used to accommodate a second light-emitting material, and the third accommodating portion is used to accommodate a third light-emitting material; A plurality of hydrophilic and hydrophobic modification parts are arranged on a side of the pixel defining layer away from the base substrate, and one hydrophilic and hydrophobic modification part is arranged in one connection area; The lyophilic-lyophobic modified portion is configured to, when forming the third luminescent material, exhibit lyophilicity between two third containers connected thereto, and exhibit lyophobicity between two first containers connected thereto or two second containers connected thereto under a first preset condition; when forming the first luminescent material and the second luminescent material, exhibit lyophobicity between two third containers connected thereto, and exhibit lyophilicity between two first containers connected thereto or two second containers connected thereto under a second preset condition.

2. The display substrate according to claim 1, wherein: The hydrophilic-hydrophobic modified portion includes: a first modified portion and a second modified portion stacked in sequence; the first modified portion is connected to the first accommodating portion or the second accommodating portion in the second direction, and both ends of the first modified portion in the second direction extend to the first accommodating portion or the second accommodating portion connected thereto; the second modified portion is connected to the third accommodating portion in the first direction, and both ends of the second modified portion in the first direction extend to the third accommodating portion connected thereto; The first modified portion is configured to be liquid-repellent under the first preset condition when forming the third luminescent material; and to be liquid-philic under the second preset condition when forming the first luminescent material and the second luminescent material; The second modified portion is configured to exhibit lyophilicity under the first preset condition when forming the third luminescent material; and to exhibit lyophobicity under the second preset condition when forming the first luminescent material and the second luminescent material.

3. The display substrate according to claim 2, wherein: The hydrophilic and hydrophobic modification part is made of temperature-sensitive material; The first modified portion is configured to respond to temperature control and exhibit liquid repellency at a first temperature when forming the third luminescent material; When the first light-emitting material and the second light-emitting material are formed, at a second temperature, they exhibit lyophilicity; The second modified portion is configured to respond to temperature control and exhibit lyophilicity at the first temperature when forming the third luminescent material; When the first light-emitting material and the second light-emitting material are formed, liquid repellency is exhibited at the second temperature.

4. The display substrate according to claim 1, wherein: The pixel defining layer includes: a first sub-pixel defining layer and a second sub-pixel defining layer; the first sub-pixel defining layer is arranged on the base substrate, and the second sub-pixel defining layer is arranged on the side of the first sub-pixel defining layer away from the base substrate; the thickness of the first sub-pixel defining layer is less than the thickness of the second sub-pixel defining layer.

5. The display substrate according to claim 1, wherein: Also includes: A first electrode layer is disposed on the base substrate and located in the pixel pattern area, and includes a plurality of first electrodes; One of the first electrodes corresponds to one light emitting area; The light-emitting layer is arranged on a side of the first electrode layer away from the base substrate, and includes the first light-emitting material, the second light-emitting material and the third light-emitting material.

6. The display substrate according to claim 5, wherein: Also includes: A second electrode layer is disposed on a side of the pixel defining layer and the light emitting layer away from the base substrate; The encapsulation layer is arranged on a side of the second electrode layer away from the base substrate.

7. A display device, wherein: include: A display substrate as claimed in any one of claims 1 to 6.

8. A method for preparing a display substrate, wherein: include: A first electrode layer is formed on a base substrate; wherein the base substrate is divided into a pixel pattern area, the pixel pattern area includes a plurality of first light-emitting areas, a plurality of second light-emitting areas and a plurality of third light-emitting areas; the first light-emitting areas and the second light-emitting areas are alternately arranged along a first direction to form a first light-emitting row; the plurality of third light-emitting areas arranged side by side along the first direction form a second light-emitting row; the first light-emitting row and the second light-emitting row are alternately arranged in a second direction; the plurality of first light-emitting areas arranged side by side along the second direction form a first light-emitting column, the plurality of second light-emitting areas arranged side by side along the second direction form a second light-emitting column, and the plurality of third light-emitting areas arranged side by side along the second direction form a third light-emitting column; one third light-emitting column is arranged between adjacent first light-emitting columns and second light-emitting columns; the second light-emitting row is arranged crosswise with the first light-emitting column and the second light-emitting column to define a plurality of connection areas; the first electrode layer is located in the pixel pattern area, and includes a plurality of first electrodes; one first electrode corresponds to one light-emitting area; forming a pixel defining layer on the base substrate; wherein the pixel defining layer comprises a first accommodating portion corresponding to the first light emitting area, a second accommodating portion corresponding to the second light emitting area, and a third accommodating portion corresponding to the third light emitting area; A plurality of hydrophilic-hydrophobic modified portions are formed on a side of the pixel defining layer away from the base substrate; wherein one hydrophilic-hydrophobic modified portion is provided in one connection area; Printing a light-emitting layer on a side of the first electrode layer away from the base substrate, wherein a first light-emitting material is formed in the first receiving portion, a second light-emitting material is formed in the second receiving portion, and a third light-emitting material is formed in the third receiving portion; Among them, when forming the third luminescent material, under the first preset condition, the hydrophilic-lyophobic modified part is lyophilic between the two third containers connected to it, and is hydrophobic between the two first containers or the two second containers connected to it; when forming the first luminescent material and the second luminescent material, under the second preset condition, the hydrophilic-lyophobic modified part is hydrophobic between the two third containers connected to it, and is hydrophilic between the two first containers or the two second containers connected to it.

9. The preparation method according to claim 8, wherein: The step of forming a plurality of hydrophilic and hydrophobic modified portions on a side of the pixel defining layer away from the base substrate comprises: forming a first modified portion and a second modified portion which are sequentially stacked; The first modified portion is connected to the first accommodating portion or the second accommodating portion in the second direction, and both ends thereof in the second direction extend to the first accommodating portion or the second accommodating portion connected thereto; the second modified portion is connected to the third accommodating portion in the first direction, and both ends thereof in the first direction extend to the third accommodating portion connected thereto; Among them, when forming the third light-emitting material, under the first preset condition, the first modified portion is liquid-repellent and the second modified portion is liquid-philic; when forming the first light-emitting material and the second light-emitting material, under the second preset condition, the first modified portion is liquid-philic and the second modified portion is liquid-repellent.

10. The display substrate according to claim 9, wherein: The hydrophilic and hydrophobic modification part is made of temperature-sensitive material; In response to temperature control, when forming the third light-emitting material, at a first temperature, the first modified portion exhibits liquid repellency and the second modified portion exhibits liquid affinity; when forming the first light-emitting material and the second light-emitting material, at a second temperature, the first modified portion exhibits liquid affinity and the second modified portion exhibits liquid repellency.

11. The preparation method according to claim 8, wherein: The pixel defining layer comprises: a first sub-pixel defining layer and a second sub-pixel defining layer; The step of forming a pixel defining layer on a substrate comprises: forming a first sub-pixel defining layer on the base substrate; forming a second sub-pixel defining layer on a side of the first sub-pixel defining layer away from the base substrate; The thickness of the first sub-pixel defining layer is smaller than the thickness of the second sub-pixel defining layer.

12. The preparation method according to claim 8, wherein: After printing the light-emitting layer on the side of the first electrode layer facing away from the base substrate, the method further includes: forming a second electrode layer on the side of the pixel defining layer and the light emitting layer away from the base substrate to obtain a light emitting device; The light emitting device is packaged.

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