CN113193027A - Display panel, manufacturing method thereof and display device - Google Patents
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- CN113193027A CN113193027A CN202110460845.9A CN202110460845A CN113193027A CN 113193027 A CN113193027 A CN 113193027A CN 202110460845 A CN202110460845 A CN 202110460845A CN 113193027 A CN113193027 A CN 113193027A
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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- H—ELECTRICITY
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Abstract
The embodiment of the application provides a display panel, a manufacturing method of the display panel and display equipment. In the display panel provided by the embodiment of the application, since the opening area of the first pixel defining structure located in the central region of the display panel is smaller than the opening area of the first pixel defining structure located in the peripheral region surrounding the central region, the surface area per unit volume of the organic material solution in the first pixel defining structure opening in the central area is larger than the surface area per unit volume of the organic material solution in the first pixel defining structure opening in the peripheral area, so that the evaporation speed of the organic material solution in the first pixel defining structure opening in the central area can be increased, the evaporation speed of the organic material solution in the first pixel defining structure opening in the peripheral area can be reduced, the drying speed of the organic material solution in the central area is the same as that of the organic material solution in the peripheral area without changing the original drying environment.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and display equipment.
Background
With the development of display technology, an OLED (Organic Light-Emitting Diode) display panel is favored by more and more consumers due to its characteristics of self-luminescence, low power consumption, flexibility, and the like.
At present, in the process of manufacturing the OLED display panel by using the inkjet printing process, due to the limitation of the manufacturing process, in the existing drying environment, the ink drying speed of the opening of the pixel defining layer at the edge of the substrate is greater than the ink drying speed of the opening of the pixel defining layer at the center of the substrate, which causes the problems of uneven thickness of the pixel layer and spots of the pixel layer formed after the ink is dried, thereby causing uneven display brightness of the OLED display panel and affecting the display effect of the OLED display panel.
Disclosure of Invention
The application provides a display panel, a manufacturing method thereof and display equipment aiming at the defects of the existing mode, and aims to solve the technical problem that in the ink jet printing process of the display panel in the prior art, the drying speed of ink located in the edge area of a substrate base plate is higher than that of ink located in the central area of the substrate base plate.
In a first aspect, an embodiment of the present application provides a display panel, including:
a substrate base plate;
a plurality of first pixel defining structures arranged in an array on one side of the substrate, wherein the opening area of the first pixel defining structures in the central region of the display panel is smaller than that of the first pixel defining structures in the peripheral region of the display panel, and the peripheral region surrounds the central region; the organic functional layer is formed by drying an organic material solution which is subjected to ink-jet printing in the opening of the first pixel defining structure, and in the ink-jet printing process, the surface area per unit volume of the organic material solution in the opening of the first pixel defining structure positioned in the central area is larger than the surface area per unit volume of the organic material solution in the opening of the first pixel defining structure positioned in the peripheral area.
In a second aspect, an embodiment of the present application provides a display device, including: the display panel provided by the first aspect is described above.
In a third aspect, an embodiment of the present application provides a method for manufacturing a display panel, including:
preparing a plurality of first pixel defining structures arranged in an array on one side of a substrate, so that the opening area of the first pixel defining structures positioned in the central area of the display panel is smaller than that of the first pixel defining structures positioned in the peripheral area of the display panel, and the peripheral area surrounds the central area;
ink-jet printing an organic material solution in the openings of the first pixel defining structures such that a surface area per unit volume of the organic material solution within the openings of the first pixel defining structures in the central region is greater than a surface area per unit volume of the organic material solution within the openings of the first pixel defining structures in the peripheral region;
and drying the organic material solution to form the organic functional layer.
The beneficial technical effects brought by the technical scheme provided by the embodiment of the application comprise:
in the display panel provided by the embodiment of the application, since the opening area of the first pixel defining structure located in the central region of the display panel is smaller than the opening area of the first pixel defining structure located in the peripheral region of the display panel surrounding the central region, so that the surface area per unit volume of the organic material solution in the opening of the first pixel defining structure located in the central region is larger than the surface area per unit volume of the organic material solution in the opening of the first pixel defining structure located in the peripheral region, so that the evaporation rate of the organic material solution in the opening of the first pixel defining structure located in the central region is larger than the evaporation rate of the organic material solution in the opening of the first pixel defining structure located in the peripheral region, thereby increasing the evaporation rate of the organic material solution in the opening of the first pixel defining structure located in the central region and reducing the evaporation rate of the organic material solution in the opening of the first pixel defining structure located in the peripheral region, and then can be under the condition that does not change original dry environment, make the drying rate of the organic material solution that is located central zone the same with the drying rate of the organic material solution that is located peripheral zone, make the organic functional layer that forms after the organic material solution is dried thickness even, greatly reduced with the organic functional layer of pixel layer as the representative the probability that the spot appears, can make OLED display panel's display luminance even, promote display effect.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic cross-sectional view of a portion of the display panel shown in FIG. 1 including a first pixel defining structure opening having an organic material solution therein according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of a portion of the display panel shown in FIG. 1 including an organic material solution in another opening of the first pixel defining structure according to an embodiment of the present disclosure;
FIG. 4 is a schematic cross-sectional view of another embodiment of the dried organic material solution in the first pixel defining structure opening of the display panel shown in FIG. 3;
fig. 5 is a schematic structural diagram of another display panel provided in the embodiment of the present application;
fig. 6 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure;
fig. 7a is a schematic view illustrating a state after an organic material solution is inkjet printed in an opening of a first pixel defining structure in a method for manufacturing a display panel according to an embodiment of the present disclosure;
FIG. 7b is a schematic diagram illustrating a state of the first pixel in the process of drying the organic material solution in the opening of the structure defined by the first pixel in the method for fabricating the display panel according to the embodiment of the present disclosure;
fig. 7c is a schematic diagram illustrating a state after the organic material solution in the first pixel defining structure opening is dried in the method for manufacturing the display panel according to the embodiment of the present application.
Description of reference numerals:
10-a substrate base plate;
20-a first pixel defining structure; 21-a first sub-defining structure; 22-a second sub-defining structure;
30-an organic functional layer; 31-organic material solution; 311-organic material solution droplets;
40-a second pixel defining structure; 41-sub-defining structures.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, 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 to which this application belongs. 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 prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" 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 when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The inventor of the present application researches and discovers that, in the process of manufacturing an OLED display panel by inkjet printing, due to the limitation of the manufacturing process, the ink vapor concentration of the peripheral area of the substrate base plate is less than that of the central area of the substrate base plate, so that the ink drying speed of the opening of the pixel defining layer at the edge of the substrate base plate is greater than that of the opening of the pixel defining layer at the center of the substrate base plate, which causes the problems of non-uniform thickness of the pixel layer formed after ink drying and spots of the pixel layer, thereby causing the non-uniform display brightness of the OLED display panel and affecting the display effect of the OLED display panel.
The application provides a display panel, a manufacturing method thereof and display equipment, and aims to solve the above technical problems in the prior art.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.
An embodiment of the application provides a display panel, a schematic structural diagram of the display panel is shown in fig. 1, a schematic structural diagram of a partial cross-section of the display panel shown in fig. 1, which includes a first pixel defining structure opening in which an organic material solution exists, is shown in fig. 2, a schematic structural diagram of a partial cross-section of the display panel shown in fig. 1, which includes another first pixel defining structure opening in which an organic material solution exists, is shown in fig. 3, and a schematic structural diagram of a partial cross-section of the display panel shown in fig. 3, which is obtained after the organic material solution in the another first pixel defining structure opening is dried, is shown in fig. 4. A display panel, comprising:
a base substrate 10;
a plurality of first pixel defining structures 20 arranged in an array at one side of the substrate base plate 10, wherein the opening area of the first pixel defining structures 20 at the central region of the display panel is smaller than that of the first pixel defining structures 20 at the peripheral region of the display panel, and the peripheral region surrounds the central region; the organic functional layer 30 is disposed in the opening of the first pixel defining structure 20, the organic functional layer 30 is formed by drying the organic material solution 31 inkjet-printed in the opening of the first pixel defining structure 20, and during the inkjet printing process, the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region is larger than the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the peripheral region.
In the display panel provided by the embodiment of the present application, since the opening area of the first pixel defining structure 20 located in the central region of the display panel is smaller than the opening area of the first pixel defining structure 20 located in the peripheral region of the display panel surrounding the central region, so that the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region is larger than the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the peripheral region, so that the evaporation rate of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region is larger than the evaporation rate of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the peripheral region, thereby increasing the evaporation rate of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region, the evaporation speed of the organic material solution 31 in the opening of the first pixel defining structure 20 in the peripheral area is reduced, and then the drying speed of the organic material solution 31 in the central area is the same as that of the organic material solution 31 in the peripheral area without changing the original drying environment, so that the thickness of the organic functional layer 30 formed after the organic material solution 31 is dried is uniform, the probability of spots appearing in the organic functional layer 30 represented by a pixel layer is greatly reduced, the display brightness of the OLED display panel is uniform, and the display effect is improved.
In the embodiment of the present application, the substrate 10 has a plurality of first pixel defining structures 20 arranged in an array on one side thereof, and since the opening area of the first pixel defining structure 20 located in the central region of the display panel is smaller than the opening area of the first pixel defining structure 20 located in the peripheral region of the display panel surrounding the central region, the volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region is smaller than the volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the peripheral region, so that the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region is larger than the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the peripheral region.
As understood by those skilled in the art, the greater the surface area per unit volume of the organic material solution 31, the faster the evaporation rate of the organic material solution 31 is under the same conditions, and therefore, in the present embodiment, the evaporation rate of the organic material solution 31 in the openings of the first pixel defining structures 20 located in the central region is greater than that of the organic material solution 31 in the openings of the first pixel defining structures 20 located in the peripheral region, thereby increasing the evaporation rate of the organic material solution 31 in the openings of the first pixel defining structures 20 located in the central region, decreasing the evaporation rate of the organic material solution 31 in the openings of the first pixel defining structures 20 located in the peripheral region, the drying rate of the organic material solution 31 in the central region can be made the same as the drying rate of the organic material solution 31 in the peripheral region without changing the original drying environment.
It should be noted that, in the embodiment of the present application, the central area is an area near the center of the display panel; the peripheral region is a region relatively far from the center of the display panel, i.e., a region near the edge of the display panel with respect to the center of the display panel is the peripheral region. Alternatively, as shown in fig. 2, the schematic diagram is a partial cross-sectional structure diagram of the display panel shown in fig. 1, which is located in the central area during the inkjet printing process; FIG. 3 is a schematic view of a partial cross-sectional structure of the display panel shown in FIG. 1 in a peripheral region during ink-jet printing; FIG. 4 is a schematic cross-sectional view of a portion of the display panel shown in FIG. 3 after the organic material solution in the first pixel defining structure opening is dried. As can be seen from fig. 2 and 3, the volume of the organic material solution 31 in the opening of the first pixel defining structure 20 in the central region is smaller than the volume of the organic material solution 31 in the opening of the first pixel defining structure 20 in the peripheral region, so that the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 in the central region is larger than the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 in the peripheral region.
Compared with the prior art, the ink vapor concentration in the peripheral area of the substrate base plate 10 is less than that in the central area of the substrate base plate, so that the ink drying speed of the opening of the pixel defining layer at the edge of the substrate base plate 10 is greater than that of the opening of the pixel defining layer at the center of the substrate base plate 10. In the embodiment of the present application, under the condition that the original drying environment is not changed, the evaporation speed of the organic material solution 31 in the opening of the first pixel defining structure 20 in the central area is increased, and the evaporation speed of the organic material solution 31 in the opening of the first pixel defining structure 20 in the peripheral area is decreased, so that the drying speed of the organic material solution 31 in the central area and the drying speed of the organic material solution 31 in the peripheral area tend to be the same.
Thereby can make all first pixels of display panel define the thickness of organic functional layer 30 after organic material solution 31 drying formation in the structure 20 opening unanimous, can avoid organic functional layer 30 the problem of spot to can make display panel's display luminance even, can ensure display panel's display effect, guarantee user's use experience.
As shown in fig. 2 to 4, the height of the organic material solution 31 may be higher than the height of the first pixel defining structure 20 in a direction perpendicular to the base substrate 10 due to surface tension.
It should be noted that the broken line in fig. 1 indicates the omitted first pixel defining structure 20. In the embodiment of the present application, the organic functional layer 30 is an organic light emitting layer.
In one embodiment of the present application, the opening area of each of the first pixel defining structures 20 gradually increases in a direction from the central region toward the peripheral region.
In the embodiment of the present application, the opening area of each first pixel defining structure 20 gradually increases in a direction from the central region of the display panel to the peripheral region of the display panel. That is, in the direction from the central region of the display panel to the peripheral region of the display panel, the opening area of the first pixel defining structure 20 near the central region is smaller than the opening area of the first pixel defining structure 20 far from the central region in any two adjacent first pixel defining structures 20. It is thereby possible to gradually decrease the surface area per unit volume of the organic material solution 31 in the openings of the respective first pixel defining structures 20 in a direction from the central region toward the peripheral region, so that the evaporation speed of the organic material solution 31 in the openings of the respective first pixel defining structures 20 is gradually decreased.
Therefore, under the condition that the original drying environment is not changed, the evaporation speed of the organic material solution 31 in the opening of the first pixel defining structure 20 in the peripheral area is reduced, so that in the drying process of the organic material solution 31 of the display panel in the ink-jet printing process, the drying speed of the organic material solution 31 in the opening of each first pixel defining structure 20 is the same in the direction from the central area to the peripheral area, the thicknesses of the organic functional layers 30 formed by drying are consistent, the display brightness of the display panel is uniform, and the display effect of the display panel can be guaranteed.
Alternatively, as shown in fig. 1, the opening area of each of the first pixel defining structures 20 gradually increases in a direction from the center of the display panel to opposite edges of the display panel in the length direction of the display panel. And the opening area of each of the first pixel defining structures 20 is the same in a direction perpendicular to the length direction of the display panel, i.e., in the width direction of the display panel. This is because the length of the display panel is greater than the width of the display panel, and the distance between the two opposite sides and the center of the display panel in the width direction of the display panel is smaller, so that the drying speed of the organic material solution 31 at the two sides is not much different from the drying speed of the organic material solution 31 at the center, and therefore, the arrangement of the opening areas of the first pixel defining structure 20 adopts the scheme shown in fig. 1.
It should be noted that, a person skilled in the art can select an appropriate arrangement of the opening areas of the first pixel defining structures 20 according to the size specification, shape and production equipment of the display panel to be actually produced. For example, the opening area of each of the first pixel defining structures 20 is gradually increased in a width direction parallel to the display panel.
In one embodiment of the present application, in a direction from the central region toward the peripheral region, the area change step value S of the opening areas of any two adjacent first pixel defining structures 20 is a product of the first opening area difference value a and a first coefficient y; a first opening area difference a, which is a difference in opening areas of the first pixel defining structure 20 having the largest opening area and the first pixel defining structure 20 having the smallest opening area among all the first pixel defining structures 20; the first coefficient y is an n-th power of an inverse of a first ratio a of surface areas of the organic material solution 31 having the largest surface area and the organic material solution 31 having the smallest surface area among the organic material solutions 31 in the openings of all the first pixel defining structures 20, and n is a positive integer greater than or equal to 1.
In the embodiment of the present application, in a direction from the central region to the peripheral region, the relationship between the area change step value S of the opening areas of any two adjacent first pixel defining structures 20, the first opening area difference value a, and the first coefficient y is shown in the following relation (1):
s is y A relation (1)
As can be seen from equation (1), the opening area of each first pixel defining structure 20 gradually increases in a direction from the central region to the peripheral region. In equation (1), the first coefficient y is calculated as shown in equation (2):
y＝(1/a)nrelational expression (2)
In the relation (2), the first ratio a is determined by the property of the organic material solution and the opening area of the first pixel defining structure 20, and in the embodiment of the present application, the first ratio a is the ratio of the surface area of the organic material solution 31 having the largest surface area to the surface area of the organic material solution 31 having the smallest surface area in all the organic material solutions 31 in the openings of the first pixel defining structure 20; n is an integer, and n is more than or equal to 1.
In the embodiment of the present application, assuming that the opening area of the first pixel defining structure 20 located at the center of the display panel is S1, the opening area S2 of another first pixel defining structure 20 close to the first pixel defining structure 20 in the direction from the central region to the peripheral region is the sum of S1 and S.
In one embodiment of the present application, the display panel further includes a plurality of second pixel defining structures located within the openings of the first pixel defining structures 20, the second pixel defining structures 40 being arranged in an array on one side of the substrate base plate 10.
In the embodiment of the present application, as shown in fig. 2 to 4, the display panel further includes second pixel defining structures 40 arranged in an array on one side of the substrate 10, and the second pixel defining structures 40 are located in the openings of the first pixel defining structures 20.
As shown in fig. 2 to 4, the first pixel defining structure 20 includes a first sub-defining structure 21 and a second sub-defining structure 22, an area between the first sub-defining structure 21 and the second sub-defining structure 22 is an opening of the first pixel defining structure 20, and the second pixel defining structure 40 is located between the first sub-defining structure 21 and the second sub-defining structure 22.
In one embodiment of the present application, the area change step value S of the opening area of any two adjacent first pixel defining structures 20 is an integral multiple of the opening area of the second pixel defining structure 40.
In the embodiment of the present application, as shown in fig. 4 and fig. 5, the organic functional layer 30 formed by drying the organic material solution 31 in the opening of the first pixel defining structure 20 of the display panel is located in the opening of the second pixel defining structure 40.
In the embodiment of the present application, the area change step value S of the opening areas of any two adjacent first pixel defining structures 20 is an integral multiple of the opening area of the second pixel defining structure 40. Assuming that the aperture area of the first pixel defining structure 20 located at the center of the display panel is S1, the aperture area S2 of another first pixel defining structure 20 adjacent to the first pixel defining structure 20 is the sum of S1 and S in the direction from the central region to the peripheral region, and the step value S is an integral multiple of the aperture area of the second pixel defining structure 40 due to the area change. Therefore, in the display panel, in the direction from the central area to the peripheral area, in any one of the first pixel defining structures 20, the size of each organic functional layer 30 located in the opening of the second pixel defining structure 40 is approximately the same, so that the display brightness of the display panel is uniform, the display effect of the display panel can be guaranteed, and the use experience of a user can be guaranteed.
In one embodiment of the present application, the ratio of the opening area of any of the first pixel defining structures 20 to the opening area of the second pixel defining structure 40 is a positive integer.
In the embodiment of the present application, the ratio of the opening area of any one of the first pixel defining structures 20 to the opening area of the second pixel defining structure 40 is a positive integer, so as to further ensure that, in any one of the first pixel defining structures 20, the size of each organic functional layer 30 located in the opening of the second pixel defining structure 40 is the same, thereby enabling the display brightness of the display panel to be uniform, ensuring the display effect of the display panel, and ensuring the use experience of a user.
In one embodiment of the present application, the height of the first pixel defining structure 20 is greater than the height of the second pixel defining structure 40 in a direction perpendicular to the substrate base plate 10.
In the embodiment of the present application, as shown in fig. 5, the first pixel defining structure 20 includes a first sub-defining structure 21 and a second sub-defining structure 22, and the second pixel defining structure 40 includes a sub-defining structure 41; in the drying process of the organic material solution 31 filled in the opening of the first pixel defining structure 20, as the solvent of the organic material solution 31 evaporates, the two adjacent sub-defining structures 41 are filled with the organic material solution drops 311 in a certain dry state.
As shown in fig. 2-5, the height of the sub-defining structures 41 is less than the height of the first and second sub-defining structures 21 and 22 in a direction perpendicular to the substrate base plate 10, such that the height of the first pixel defining structure 20 is greater than the height of the second pixel defining structure 40. In the embodiment of the present application, the first pixel defining structure 20 functions as a barrier to the organic material solution 31, and specifically, the organic material solution 31 is trapped between the first sub-defining structure 21 and the second sub-defining structure 22.
The organic material solution 31 is gradually reduced along with the evaporation of the solvent of the organic material solution 31, so that the second pixel defining structure 40 plays a role in defining the organic functional layer 30, specifically, the organic material solution droplet 311 is enclosed between two adjacent sub-defining structures 41, and along with the further evaporation of the solvent in the organic material solution droplet 311, until the organic functional layer 30 is formed between two adjacent sub-defining structures 41, in this embodiment, the organic functional layer 30 is an organic light emitting layer, and through the limiting function of the second pixel defining structure 40, the size of a single organic light emitting layer of the display panel provided in this embodiment of the present application is reduced, so that the resolution of the display panel can be improved.
Optionally, in the embodiment of the present application, the height of the first pixel defining structure 20 is not less than 1.2 microns and not more than 2.5 microns, that is, the height of the first sub-defining structure 21 is not less than 1.2 microns and not more than 2.5 microns, and the height of the second sub-defining structure 22 is not less than 1.2 microns and not more than 2.5 microns. The height of the second pixel defining structure 40 is not less than 0.2 micrometers and not more than 1 micrometer, i.e., the height of the sub-defining structure 41 is not less than 0.2 micrometers and not more than 1 micrometer.
In one embodiment of the present application, the first pixel defining structure 20 is made of an organic material, and the second pixel defining structure 40 is made of an organic material.
In the embodiment of the present application, the material for forming the first pixel defining structure 20 includes an organic material, and optionally, the material for forming the first pixel defining structure 20 includes a polymer resin. The material for forming the second pixel defining structure 40 includes at least one of an inorganic material and an organic material, optionally, the material for forming the second pixel defining structure 40 includes an inorganic material such as SiO2 (silicon dioxide) and SiNx (silicon nitride), and the material for forming the second pixel defining structure 40 may further include an organic glue.
Based on the same inventive concept, embodiments of the present application provide a display device including the display panel provided in the above embodiments.
The display device provided by the embodiment of the present application has the same inventive concept and the same advantageous effects as the previous embodiments, and the content of the display panel in the display device, which is not shown in detail, can refer to the previous embodiments, and is not described herein again.
Based on the same inventive concept, an embodiment of the present application provides a method for manufacturing a display panel, where a flow diagram of the method is shown in fig. 6, and the method includes:
s601, preparing a plurality of first pixel defining structures arranged in an array on one side of a substrate, such that an opening area of the first pixel defining structures located in a central region of the display panel is smaller than an opening area of the first pixel defining structures located in a peripheral region of the display panel, the peripheral region surrounding the central region.
In this step, a pixel defining layer may be formed on the substrate 10 by evaporation, printing, and the like, and then the first pixel defining structure 20 is prepared by processes of gluing, exposing, developing, etching, and the like, such that an opening area of the first pixel defining structure in a central region of the display panel is smaller than an opening area of the first pixel defining structure in a peripheral region of the display panel, where the peripheral region surrounds the central region.
Alternatively, a pixel defining layer is formed on the substrate 10, and then the first pixel defining structure 20 and the second pixel defining structure 40 located in the opening of the first pixel defining structure 20 are formed by processes of glue coating, exposure, development, etching, and the like.
S602, ink-jet printing an organic material solution in the openings of the first pixel defining structures, such that a surface area per unit volume of the organic material solution in the openings of the first pixel defining structures located in the central region is greater than a surface area per unit volume of the organic material solution in the openings of the first pixel defining structures located in the peripheral region.
In this step, the organic material solution 31 is inkjet printed in the openings of the first pixel defining structures 20 such that the surface area per unit volume of the organic material solution 31 in the openings of the first pixel defining structures 20 located in the central region is larger than the surface area per unit volume of the organic material solution 31 in the openings of the first pixel defining structures 20 located in the peripheral region.
And S603, drying the organic material solution to form the organic functional layer.
In this step, the organic material solution 31 is dried under reduced pressure, the drying speed of the organic material solution 31 in the central region is the same as that of the organic material solution 31 in the peripheral region, and the thickness of the organic functional layer 30 formed by drying the organic material solution 31 in the openings of all the first pixel defining structures 20 of the display panel is consistent along with the evaporation of the solvent in the organic material solution 31, so that the display brightness of the display panel is uniform, and the display effect of the display panel can be guaranteed.
As shown in fig. 7a, the organic material solution 31 covers the second pixel defining structure 40; as the solvent in the organic material solution 31 evaporates, the structure shown in fig. 7b is obtained; after evaporation of the solvent from the organic material solution 31 is completed, the structure shown in fig. 7c is obtained.
Alternatively, one skilled in the art can select an appropriate amount of the organic material solution 31 to be filled in the opening of the first pixel defining structure 20 according to actual requirements.
By applying the embodiment of the application, at least the following beneficial effects can be realized:
in the display panel provided by the embodiment of the present application, since the opening area of the first pixel defining structure 20 located in the central region of the display panel is smaller than the opening area of the first pixel defining structure 20 located in the peripheral region of the display panel surrounding the central region, so that the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region is larger than the surface area per unit volume of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the peripheral region, so that the evaporation rate of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region is larger than the evaporation rate of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the peripheral region, thereby increasing the evaporation rate of the organic material solution 31 in the opening of the first pixel defining structure 20 located in the central region, the evaporation rate of the organic material solution 31 in the opening of the first pixel defining structure 20 in the peripheral region is reduced, so that the drying rate of the organic material solution 31 in the central region can be the same as that of the organic material solution 31 in the peripheral region.
Thereby can make all first pixels of display panel define the thickness of organic functional layer 30 after organic material solution 31 drying formation in the structure 20 opening unanimous, can avoid organic functional layer 30 the problem of spot to can make display panel's display luminance even, can ensure display panel's display effect, guarantee user's use experience.
Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A display panel, comprising:
a substrate base plate;
a plurality of first pixel defining structures arranged in an array on one side of the substrate, wherein the opening area of the first pixel defining structures in a central region of the display panel is smaller than the opening area of the first pixel defining structures in a peripheral region of the display panel, the peripheral region surrounding the central region; the organic functional layer is formed by drying an organic material solution which is subjected to ink-jet printing in the first pixel defining structure opening, and in the ink-jet printing process, the surface area per unit volume of the organic material solution in the first pixel defining structure opening in the central area is larger than the surface area per unit volume of the organic material solution in the first pixel defining structure opening in the peripheral area.
2. The display panel according to claim 1, wherein an opening area of each of the first pixel defining structures gradually increases in a direction from the central region toward the peripheral region.
3. The display panel according to claim 2, wherein the area change step value of the opening area of any two adjacent first pixel defining structures in a direction from the central region toward the peripheral region is a product of a first opening area difference value and a first coefficient; the first opening area difference is a difference between opening areas of the first pixel defining structure having the largest opening area and the first pixel defining structure having the smallest opening area among all the first pixel defining structures; the first coefficient is n-th power of an inverse of a first ratio of a surface area of the organic material solution having the largest surface area to a surface area of the organic material solution having the smallest surface area among all the organic material solutions in the first pixel defining structure openings, and n is a positive integer greater than or equal to 1.
4. The display panel of claim 1, further comprising a plurality of second pixel defining structures located within the openings of the first pixel defining structures, the array of second pixel defining structures being arranged on one side of the substrate base plate.
5. The display panel according to claim 4, wherein the step value of the area change of the aperture area of any two adjacent first pixel defining structures is an integral multiple of the aperture area of the second pixel defining structure.
6. The display panel according to claim 4, wherein a ratio of an opening area of any one of the first pixel defining structures to an opening area of the second pixel defining structure is a positive integer.
7. The display panel of claim 4, wherein the first pixel defining structures have a height greater than a height of the second pixel defining structures in a direction perpendicular to the substrate base.
8. The display panel according to claim 4, wherein the first pixel defining structure is made of an organic material, and wherein the second pixel defining structure is made of an organic material.
9. A display device, comprising: the display panel of any one of claims 1-8.
10. A method for manufacturing a display panel is characterized by comprising the following steps:
preparing a plurality of first pixel defining structures arranged in an array on one side of a substrate so that the opening area of the first pixel defining structures located in a central region of the display panel is smaller than the opening area of the first pixel defining structures located in a peripheral region of the display panel, the peripheral region surrounding the central region;
ink-jet printing an organic material solution within the openings of the first pixel defining structures such that a surface area per unit volume of organic material solution within the first pixel defining structure openings in the central region is greater than a surface area per unit volume of organic material solution within the first pixel defining structure openings in the peripheral region;
and drying the organic material solution to form an organic functional layer.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968108A (en) * | 2017-06-16 | 2018-04-27 | 广东聚华印刷显示技术有限公司 | Pixel defining layer and its preparation method and application |
| CN108336123A (en) * | 2018-04-04 | 2018-07-27 | 京东方科技集团股份有限公司 | A kind of oled substrate and preparation method thereof, display device |
| CN109585490A (en) * | 2017-09-28 | 2019-04-05 | 京东方科技集团股份有限公司 | Pixel defining layer, inkjet printing methods, display base plate and its manufacturing method, display device |
| CN110611053A (en) * | 2019-08-20 | 2019-12-24 | 武汉华星光电半导体显示技术有限公司 | Preparation method of display panel and preparation method of functional layer of display panel |
| JP2021012816A (en) * | 2019-07-05 | 2021-02-04 | キヤノン株式会社 | Functional element and manufacturing method of the same |
| US20210091153A1 (en) * | 2019-09-19 | 2021-03-25 | Hefei Boe Joint Technology Co.,Ltd. | Display Substrate and Preparation Method thereof, and Display Apparatus |
-
2021
- 2021-04-27 CN CN202110460845.9A patent/CN113193027B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968108A (en) * | 2017-06-16 | 2018-04-27 | 广东聚华印刷显示技术有限公司 | Pixel defining layer and its preparation method and application |
| CN109585490A (en) * | 2017-09-28 | 2019-04-05 | 京东方科技集团股份有限公司 | Pixel defining layer, inkjet printing methods, display base plate and its manufacturing method, display device |
| CN108336123A (en) * | 2018-04-04 | 2018-07-27 | 京东方科技集团股份有限公司 | A kind of oled substrate and preparation method thereof, display device |
| JP2021012816A (en) * | 2019-07-05 | 2021-02-04 | キヤノン株式会社 | Functional element and manufacturing method of the same |
| CN110611053A (en) * | 2019-08-20 | 2019-12-24 | 武汉华星光电半导体显示技术有限公司 | Preparation method of display panel and preparation method of functional layer of display panel |
| US20210091153A1 (en) * | 2019-09-19 | 2021-03-25 | Hefei Boe Joint Technology Co.,Ltd. | Display Substrate and Preparation Method thereof, and Display Apparatus |
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|---|---|
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