Array substrate and manufacturing method therefor, display device, and mask plate

Provided are an array substrate and a manufacturing method therefor, a display device, and a mask plate. The array substrate includes a pixel defining layer having a first opening, a second opening, and a third opening passing through the pixel defining layer. Every two of the first to third openings are adjacent to each other. The pixel defining layer includes first to third opening denning portions. At least one of the ratio of the slope angle of a portion of the first opening defining portion located between the first opening and the second opening to the slope angle of the third opening defining portion, and the ratio of the slope angle of a portion of the second opening defining portion located between the first opening and the second opening to the slope angle of the third opening defining portion is from 0.8 to 1.25.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a U.S. National Phase Entry of International Application No. PCT/CN2020/089118 filed on May 8, 2020, designating the United States of America and claiming priority to Chinese Patent Application No. 201910394681.7, filed on May 13, 2019. The present application claims priority to and the benefit of the above-identified applications and the above-identified applications are incorporated by reference herein in their entirety.

TECHNICAL FIELD

At least one embodiment of the present disclosure relates to an array substrate and a manufacturing method, a display device and a mask plate.

BACKGROUND

Display devices using organic light-emitting diode (OLED) display panels have a wide application prospect for having the advantages of simple manufacturing process, quick response speed, thin thickness, light weight, wide angle of view, active light emission, high brightness, continuous and adjustable light-emitting color, low power consumption, low cost, easiness for implementation of flexible display and the like.

SUMMARY

At least one embodiment of the present disclosure relates to an array substrate and a manufacturing method, a display device and a mask plate.

At least one embodiment of the present disclosure provides an array substrate, including a pixel defining layer (PDL), the PDL is provided with a first opening, a second opening, and a third opening that penetrate the PDL, and every two of the first opening, the second opening, and the third opening are adjacent to each other; a minimum distance between the first opening and the second opening is less than a minimum distance between the first opening and the third opening; the PDL includes a first opening defining portion, a second opening defining portion, and a third opening defining portion; the first opening defining portion is configured to define the first opening, the second opening defining portion is configured to define the second opening, and the third opening defining portion is configured to define the third opening; and at least one of a ratio of a slope angle of a part of the first opening defining portion located between the first opening and the second opening to a slope angle of the third opening defining portion and a ratio of a slope angle of a part of the second opening defining portion located between the first opening and the second opening to the slope angle of the third opening defining portion is in a range from 0.8 to 1.25.

According to the array substrate provided by one or more embodiments of the present disclosure, at least one of the ratio of the slope angle of the part of the first opening defining portion located between the first opening and the second opening to the slope angle of the third opening defining portion and the ratio of the slope angle of the part of the second opening defining portion located between the first opening and the second opening to the slope angle of the third opening defining portion is more than or equal to 1 and less than 1.2.

According to the array substrate provided by one or more embodiments of the present disclosure, at least one of the ratio of the slope angle of the part of the first opening defining portion located between the first opening and the second opening to the slope angle of the third opening defining portion and the ratio of the slope angle of the part of the second opening defining portion located between the first opening and the second opening to the slope angle of the third opening defining portion is more than or equal to 0.8 and less than or equal to 1.

According to the array substrate provided by one or more embodiments of the present disclosure, the slope angle of the part of the first opening defining portion located between the first opening and the second opening or the slope angle of the part of the second opening defining portion located between the first opening and the second opening is in a range from 28° to 35°.

According to the array substrate provided by one or more embodiments of the present disclosure, a ratio of a size of an orthographic projection of the part of the first opening defining portion located between the first opening and the second opening or the part of the second opening defining portion located between the first opening and the second opening on a base substrate to a size of an orthographic projection of a part of the PDL located between the first opening and the second opening on the base substrate is in a range from 0.10 to 0.25.

According to the array substrate provided by one or more embodiments of the present disclosure, the PDL is further provided with a fourth opening penetrating the PDL, every two of the fourth opening, the first opening, and the second opening are adjacent to each other, the PDL further includes a fourth opening defining portion, and the fourth opening defining portion is configured to define the fourth opening; the minimum distance between the first opening and the second opening is further less than a minimum distance between the first opening and the fourth opening; and the first opening and the second opening are located between the third opening and the fourth opening, and the first opening and the second opening are arranged at two sides of a line connecting a center of the third opening with a center of the fourth opening, respectively; and at least one of a ratio of the slope angle of the part of the first opening defining portion located between the first opening and the second opening to a slope angle of the fourth opening defining portion and a ratio of the slope angle of the part of the second opening defining portion located between the first opening and the second opening to the slope angle of the fourth opening defining portion is in a range from 0.8 to 1.25.

According to the array substrate provided by one or more embodiments of the present disclosure, the first opening, the second opening, the third opening, and the fourth opening define a light-emitting region of a first sub-pixel, a light-emitting region of a second sub-pixel, a light-emitting region of a third sub-pixel, and a light-emitting region of a fourth sub-pixel, respectively; the first sub-pixel, the third sub-pixel, and the fourth sub-pixel are sub-pixels of different colors; and the first sub-pixel and the second sub-pixel are sub-pixels of a same color.

According to the array substrate provided by one or more embodiments of the present disclosure, an area of the first opening is equal to an area of the second opening, the area of the first opening is less than an area of the fourth opening, and the area of the fourth opening is less than an area of the third opening.

According to the array substrate provided by one or more embodiments of the present disclosure, at least one of a side of the first opening close to the second opening and a side of the second opening close to the first opening is provided with a distance adjustment portion, and the distance adjustment portion is configured such that a distance between the first opening and the second opening in a direction parallel with the base substrate gradually changes in a direction intersecting with an arrangement direction of the first opening and the second opening.

According to the array substrate provided by one or more embodiments of the present disclosure, the distance adjustment portion is configured such that the distance between the first opening and the second opening in the direction parallel with the base substrate gradually decreases and then gradually increases in the direction intersecting with the arrangement direction of the first opening and the second opening.

According to the array substrate provided by one or more embodiments of the present disclosure, a distance between a side of the first opening close to the second opening and a side of the second opening close to the first opening in a direction parallel with the base substrate is a fixed value in the direction intersecting with an arrangement direction of the first opening and the second opening.

At least one embodiment of the present disclosure further provides a display device, including any one of the array substrates as described above.

At least one embodiment of the present disclosure further provides a mask plate, configured to manufacture a pixel defining layer (PDL) in an array substrate; the PDL is provided with a first opening, a second opening, and a third opening that penetrate the PDL, and every two of the first opening, the second opening, and the third opening are adjacent to each other; a minimum distance between the first opening and the second opening is less than a minimum distance between the first opening and the third opening; the PDL includes a first opening defining portion, a second opening defining portion, and a third opening defining portion; the first opening defining portion is configured to define the first opening, the second opening defining portion is configured to define the second opening, and the third opening defining portion is configured to define the third opening; and the mask plate includes: a pattern portion, including a first pattern, a second pattern, and a third pattern; the first pattern being configured to form the first opening, the second pattern being configured to form the second opening, and the third pattern being configured to form the third opening; and a filling portion, located in a region other than the pattern portion; one of the pattern portion and the filling portion is configured to transmit light, and the other of the pattern portion and the filling portion is configured to block light; at least one of a side of the first pattern close to the second pattern and a side of the second pattern close to the first pattern includes a protrusion; and the protrusion is configured such that at least one of a ratio of a slope angle of a part of the first opening defining portion located between the first opening and the second opening to a slope angle of the third opening defining portion and a ratio of a slope angle of a part of the second opening defining portion located between the first opening and the second opening to the slope angle of the third opening defining portion is in a range from 0.8 to 1.25.

According to the mask plate provided by one or more embodiments of the present disclosure, the protrusion is configured such that a distance between the first pattern and the second pattern gradually changes.

According to the mask plate provided by one or more embodiments of the present disclosure, the protrusion is of a triangle, and the distance between the first pattern and the second pattern gradually decreases and then gradually increases in a direction perpendicular to an arrangement direction of the first pattern and the second pattern.

According to the mask plate provided by one or more embodiments of the present disclosure, the protrusion and a part of the filling portion form an optical compensation portion, and the optical compensation portion is configured to transmit a part of light irradiated onto the optical compensation portion in a diffractive manner.

According to the mask plate provided by one or more embodiments of the present disclosure, the protrusion includes a plurality of sub-protrusions, and the plurality of sub-protrusions are sequentially arranged along an extension direction of each of a boundary of the first pattern and a boundary of the second pattern that are opposite to each other.

According to the mask plate provided by one or more embodiments of the present disclosure, a part of the filling portion is provided between adjacent ones of the plurality of sub-protrusions.

According to the mask plate provided by one or more embodiments of the present disclosure, each of the plurality of sub-protrusions has a size less than a resolution of an exposure machine.

According to the mask plate provided by one or more embodiments of the present disclosure, each of the plurality of sub-protrusions includes at least one of a triangle and a rectangle, at least one of a bottom length and a height of the triangle is less than or equal to 1.5 μm, and at least one of a length and a width of the rectangle is less than or equal to 1.5 μm.

According to the mask plate provided by one or more embodiments of the present disclosure, the PDL is further provided with a fourth opening penetrating the PDL, the PDL further includes a fourth pixel defining portion configured to define the fourth opening, the pattern portion further includes a fourth pattern, and the fourth pattern is configured to form the fourth opening; a minimum distance between the first pattern and the second pattern is less than a minimum distance between the first pattern and the third pattern, and less than a minimum distance between the first pattern and the fourth pattern; the first pattern and the second pattern are located between the third pattern and the fourth pattern and arranged at two sides of a line connecting a center of the third pattern with a center of the fourth pattern, respectively; and the protrusion is further configured such that at least one of a ratio of the slope angle of the part of the first opening defining portion located between the first opening and the second opening to a slope angle of the fourth opening defining portion and a ratio of the slope angle of the part of the second opening defining portion located between the first opening and the second opening to the slope angle of the fourth opening defining portion is in a range from 0.8 to 1.25.

At least one embodiment of the present disclosure further provides a manufacturing method of an array substrate, including manufacturing a pixel defining layer (PDL) with any one of the mask plates as described above.

DETAILED DESCRIPTION

FIG.1Ais a schematic diagram of a pixel arrangement. As illustrated inFIG.1A, a pixel group10includes a first sub-pixel101, a second sub-pixel102, a third sub-pixel103, and a fourth sub-pixel104. The pixel defining layer (PDL) defines a light-emitting region of each sub-pixel. InFIG.1A, a blank region within each hexagon serves as an opening of the PDL, and each opening corresponds to the light-emitting region of one sub-pixel. In light of the color mixing problem, the spacing between PDL openings of sub-pixels of different colors are typically required to be more than or equal to 20 μm.

FIG.1Bis a planar scanning electron microscope diagram of a GGRB pixel arrangement. In the case where the first sub-pixel101and the second sub-pixel102are green sub-pixels, the third sub-pixel103is a blue sub-pixel, and the fourth sub-pixel104is a red sub-pixel, the pixel arrangement is the GGRB pixel arrangement. With the GGRB pixel arrangement as an example, the spacing G1between PDL openings of the blue sub-pixel and the green sub-pixel is ≥20 μm, and the spacing G2between PDL openings of the red sub-pixel and the green sub-pixel is ≥20 μm. Because the first sub-pixel101and the second sub-pixel102are sub-pixels of the same color, the spacing G3between PDL openings of the first sub-pixel101and the second sub-pixel102is smaller, and typically is about 15 μm. Due to the smaller spacing G3between the PDL openings of the first sub-pixel101and the second sub-pixel102, the slope angle/taper angle of a portion of the PDL for forming the light-emitting region of the green sub-pixel and located between adjacent green sub-pixels is larger than the slope angle of a portion of the PDL for forming the light-emitting region of the red and/or green sub-pixel during the process.

FIG.1Cis a sectional scanning electron microscope diagram of a portion, forming a light-emitting region of a red sub-pixel R, of a PDL in a conventional art. For example, the portion11R of the PDL for forming the light-emitting region of the red sub-pixel R has a slope angle θ11of about 30.2°.FIG.1Cfurther illustrates an opening110R of the PDL. For example, the portion of the PDL for forming the light-emitting region of the blue sub-pixel B also has a slope angle of about 30.2°.

FIG.1Dis a sectional scanning electron microscope diagram of a portion, forming a light-emitting region of a green sub-pixel G, of a PDL in a conventional art. For example, the portion11G of the PDL for forming the light-emitting region of the green sub-pixel G has a slope angle θ12of about 41.1°.FIG.1Dfurther illustrates an opening110G of the PDL.

Typically, the process for manufacturing the PDL includes exposing a pixel defining thin film with a mask plate, developing the pixel defining thin film with a developing solution, and pre-baking the pixel defining thin film. The pixel defining thin film may use resin like a photoresist (PR) as a formation material. The large slope angle of the portion of the PDL for forming the light-emitting region of the green sub-pixel and located between the adjacent green sub-pixels may be attributed to at least one of the followings: (1) during the developing process, the flowability of the developing solution at the green sub-pixel is less than that of the developing solution at the sub-pixels of other colors; and (2) during the pre-baking process of the PR as the formation material of the PDL, as the space between two adjacent green sub-pixels is smaller, the flow state of the portion of the PDL that is located between the two green sub-pixels is different from that of the portions of the PDL that is located in other regions. The large slope angle of the portion of the PDL that is located between the adjacent green sub-pixels easily results in that the connection of the cathode at the green sub-pixel is poor, the light reflecting direction of the green sub-pixel is different from that of the red and/or blue sub-pixel, and the organic film for packaging, such as an organic film formed by ink-jet printing (IJP), is abnormal at the green sub-pixel to cause problem of the organic film mura and other problems.

FIG.1Eis a microscope diagram of a defect of a display device due to a difference in slope angle.FIG.1Eillustrates that the large slope angle of the portion of the PDL that is located between the green sub-pixels results in that the light outgoing direction of the green sub-pixel is different from that of the red and/or blue sub-pixel, and the organic film for packaging is abnormal at the green sub-pixel to cause problem of the organic film mura.

The embodiments of the present disclosure provide an array substrate, which can reduce the slope angles of portions of the PDL for forming close sub-pixels, and reduce the difference between the slope angles of portions of the PDL for forming sub-pixels of different colors.

FIG.2Ais a top view of an array substrate provided by an embodiment of the present disclosure. The array substrate includes: a PDL211. The PDL211is provided with a first opening201, a second opening202, and a third opening203that penetrate the PDL, and every two of the first opening201, the second opening202, and the third opening203are adjacent to each other. A minimum distance D1between the first opening201and the second opening202is less than a minimum distance D2between the first opening201and the third opening203. For the sake of clear illustration,FIG.2Amerely illustrates the PDL211and the openings penetrating the PDL211, and does not illustrate other structures.

For example, as illustrated inFIG.2A, a distance D1between a side of the first opening201close to the second opening202and a side of the second opening202close to the first opening201in a direction parallel with a base substrate2001is a fixed value in a direction intersecting with an arrangement direction of the first opening201and the second opening202, which is not limited thereto.

FIG.2Bis a sectional view of an array substrate illustrated inFIG.2Aalong line A-B. As illustrated inFIG.2AandFIG.2B, the PDL includes a first pixel defining portion21, a second pixel defining portion22, and a third pixel defining portion23; the first pixel defining portion21is configured to define the first opening201, the second pixel defining portion22is configured to define the second opening202, and the third pixel defining portion23is configured to define the third opening203. A ratio of a slope angle of a portion021of the first pixel defining portion21that is located between the first opening201and the second opening202to a slope angle of the third pixel defining portion23and/or a ratio of a slope angle of a portion022of the second pixel defining portion22that is located between the first opening201and the second opening202to the slope angle of the third pixel defining portion23are/is in a range from 0.8 to 1.25. According to the embodiment of the present disclosure, the slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202may be equal or close to the slope angle of the third pixel defining portion23, and the slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202may be equal or close to the slope angle of the third pixel defining portion23, thereby preventing the problems due to the large slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202or the large slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202. For the sake of clear illustration,FIG.2Amerely illustrates the base substrate2001, the PDL211and the openings penetrating the PDL211, and does not illustrate other structures.

As illustrated inFIG.2AandFIG.2B, each opening includes a bottom portion bp and a top portion tp, and the bottom portion bp is closer to the base substrate than the top portion tp. An area of the bottom portion bp of the opening is less than an area of the top portion tp of the opening. InFIG.2A, the closed dashed box refers to the bottom portion of the opening, and the closed solid box refers to the top portion of the opening. The portion of the PDL which is between the bottom portion bp and the top portion tp of each opening and defines the boundary of the opening is the pixel defining portion. The opening includes any one of the first opening201, the second opening202, the third opening203, and the subsequently mentioned fourth opening204. The pixel defining portion includes any one of the first pixel defining portion21, the second pixel defining portion22, the third pixel defining portion23, and the subsequently mentioned fourth pixel defining portion24. For example, the distance between the openings is a distance between opposite edges of top portions of the openings. For example, the embodiment of the present disclosure takes a case where the top portion tp of the opening corresponds to the light-emitting region of the sub-pixel as an example for description, which is not limited thereto.

For example, as illustrated inFIG.2AandFIG.2B, in the embodiment of the present disclosure, a ratio of the slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202to a slope angle of a portion of the first pixel defining portion21that is located in a region other than the region between the first opening201and the second opening202is in a range from 0.8 to 1.25, which is not limited thereto. For example, as illustrated inFIG.2AandFIG.2B, a ratio of the slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202to a slope angle of a portion of the second pixel defining portion22that is located in a region other than the region between the first opening201and the second opening202is in a range from 0.8 to 1.25, which is not limited thereto. For example, the slope angles of the third pixel defining portion23at various positions are equal or basically equal, which are not limited thereto.

For example, in other embodiments of the present disclosure, the ratio of the slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202to the slope angle of the portion, located in a region other than the region between the first opening201and the second opening202, of the first pixel defining portion21is more than or equal to 0.8 and less than or equal to 1. For example, in other embodiments of the present disclosure, the ratio of the slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202to the slope angle of the portion of the second pixel defining portion22that is located in a region other than the region between the first opening201and the second opening202is more than or equal to 0.8 and less than or equal to 1.

For example, in the embodiment of the present disclosure, the slope angle refers to an included angle between the pixel defining portion (the portion forming the opening) of the PDL and the base substrate, or, the slope angle refers to an included angle between a surface of the pixel defining portion of the PDL and a surface of the base substrate. The surface of the pixel defining portion of the PDL includes an inclined surface, a curved surface, etc. In a case where the surface of the pixel defining portion of the PDL is the curved surface, the slope angle may refer to a maximum included angle between a tangent line of the surface of the pixel defining portion of the PDL and the surface of the base substrate, or an included angle between a tangent line of a middle portion (a surface at a half of the height of the pixel defining portion) of the surface of the pixel defining portion and the surface of the base substrate, which is not limited thereto.

For example, the embodiment of the present disclosure takes a case where the portion of the PDL (that is, a planarization portion of the PDL that is located between the two openings) that is located between two openings and other than the portion forming the two openings has a thickness of about 1.5-2 μm as an example, which is not limited thereto. For example, an orthographic projection of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202or the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202on the base substrate has a size of 2 μm to 3.5 which is not limited thereto. For example, a ratio of the size of the orthographic projection of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202or the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202on the base substrate to a size of an orthographic projection of a portion of the PDL that is located between the first opening201and the second opening202is in a range from 0.10 to 0.25, which is not limited thereto. For example, as illustrated inFIG.2B, the D1is about 15 μm, and each of the D2, the D3and the D4is about 20 μm which is not limited thereto.

The array substrate provided by the embodiment of the present disclosure can reduce the slope angle of the portion of the pixel defining portion that is located between the close sub-pixels, can reduce the difference between the slope angles of the pixel defining portions that form the sub-pixels of different colors, and can improve various problems caused by the large slope angle of the portion of the pixel defining portion that is located between the close sub-pixels.

For example, the close sub-pixels may be sub-pixels that emit the light of the same color, so the same through hole of the mask plate may be used to manufacture light-emitting functional layers of the close sub-pixels, which is not limited thereto. The close sub-pixels may also be sub-pixels that emit the light of different colors.

According to the array substrate provided by one or more embodiments of the present disclosure, the ratio of the slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202to the slope angle of the third pixel defining portion23is more than or equal to 1 and less than 1.2, and/or, the ratio of the slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202to the slope angle of the third pixel defining portion23is more than or equal to 1 and less than 1.2.

For example, the slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202or the slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202is about in a range from 28° to 35°.

As illustrated inFIG.2AandFIG.2B, according to the array substrate provided by one or more embodiments of the present disclosure, the PDL211is further provided with a fourth opening204penetrating the PDL211, every two of the fourth opening204, the first opening201, and the second opening202are adjacent to each other, and the minimum distance D1between the first opening201and the second opening202is further less than a minimum distance D3between the first opening201and the fourth opening204; and the first opening201and the second opening202are located between the third opening203and the fourth opening204, and the first opening201and the second opening202are arranged at two sides of a line CL34connecting a center C3of the third opening203with a center C4of the fourth opening204, respectively. Correspondingly, the PDL211further includes a fourth pixel defining portion24, and the fourth pixel defining portion24is configured to define the fourth opening204. A ratio of the slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202to a slope angle of the fourth pixel defining portion24is in a range from 0.8 to 1.25, and/or, a ratio of the slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202to the slope angle of the fourth pixel defining portion24is in a range from 0.8 to 1.25. Further, for example, the ratio is more than or equal to 1 and less than 1.2, which is not limited thereto. For example, as illustrated inFIG.2A, the minimum distance between the second opening202and the fourth opening204is D4. For example, D3=D4, which is not limited thereto. For example, the slope angles of the fourth pixel defining portion24at various positions are equal or basically equal, which are not limited thereto.

For example, as illustrated inFIG.2AandFIG.2B, there is a little difference in the slope angle of the fourth pixel defining portion24at various positions.

For example, as illustrated inFIG.2AandFIG.2B, the embodiment of the present disclosure takes a case where the slope angle of the third pixel defining portion23or the slope angle of the fourth defining portion24is about in a range from 28° to 35° as an example, which is not limited thereto. For example, the slope angle of the third pixel defining portion23or the slope angle of the fourth defining portion24is about 30°, which is not limited thereto.

For example, in the embodiment of the present disclosure, the expression of “adjacent first element and second element” refers to that neither the first element nor the second element is arranged between the first element and the second element. In the case where the first element and the second element are the same elements, another same element is not arranged between the two same elements. For example, another element different from the first element and the second element may be arranged between the adjacent first element and second element. For example, the expression of “the adjacent first opening201and second opening202” refers to that neither the first opening201nor the second opening202is arranged between the first opening201and the second opening202.

For example, as illustrated inFIG.2AandFIG.2B, the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202, the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202, the third opening defining portion23, and the fourth pixel defining portion24are of an integral structure. For example, as illustrated inFIG.2AandFIG.2B, portions other than pentagonal blank regions and hexagonal blank regions inFIG.2Aare all of an integral structure.

For example, as illustrated inFIG.2AandFIG.2B, the slope angle θ5of the portion210of the first pixel defining portion21that is located in a region other than a region between opposite positions of the first opening201and the second opening202is approximately equal to the slope angle θ3, which is not limited thereto. For example, the ratio of the slope angle θ1to the slope angle θ5is in a range from 0.8 to 1.25. Further, for example, the ratio of the slope angle θ1to the slope angle θ5is more than or equal to 1 and less than 1.2.

For example, as illustrated inFIG.2AandFIG.2B, the slope angle θ6of the portion220of the second pixel defining portion22that is located in a region other than a region between opposite positions of the first opening201and the second opening202is approximately equal to the slope angle θ4, which is not limited thereto. For example, the ratio of the slope angle θ2to the slope angle θ6is in a range from 0.8 to 1.25. Further, for example, the ratio of the slope angle θ2to the slope angle θ6is more than or equal to 1 and less than 1.2.

For example, the slope angle θ5is equal to the slope angle θ6, which is not limited thereto. For example, the slope angle θ3is equal to the slope angle θ4, which is not limited thereto. For example, the slope angle θ5is equal to the slope angle θ3, which is not limited thereto. For example, the slope angle θ6is equal to the slope angle θ4, which is not limited thereto.

For example, as illustrated inFIG.2AandFIG.2B, an area of the first opening201is less than an area of the fourth opening204, and the area of the fourth opening204is less than an area of the third opening203. For example, the area of the third opening203is more than a sum of the area of the first opening201and the area of the second opening202, and the sum of the area of the first opening201and the area of the second opening202is more than the area of the fourth opening204. For example, in other embodiments, the sum of the area of the first opening201and the area of the second opening202is more than the area of the third opening203, and the area of the third opening203is more than the area of the fourth opening204. For example, the area of the first opening201is equal to the area of the second opening202, which is not limited thereto.

For example, as illustrated inFIG.2AandFIG.2B, the PDL211is located on the base substrate2001, an area of an orthographic projection of at least one of the first opening201and the second opening202on the base substrate2001is less than an area of an orthographic projection of the fourth opening204on the base substrate2001, and the area of the orthographic projection of the fourth opening204on the base substrate2001is less than an area of an orthographic projection of the third opening203on the base substrate2001, which is not limited thereto. For example, the area of the orthographic projection of the third opening203on the base substrate2001is more than a sum of the areas of the orthographic projections of the first opening201and the second opening202on the base substrate2001, and the sum of the areas of the orthographic projections of the first opening201and the second opening202on the base substrate2001is more than the area of the orthographic projection of the fourth opening204on the base substrate2001, which is not limited thereto. In other embodiments, the sum of the areas of the orthographic projections of the first opening201and the second opening202on the base substrate2001is more than the area of the orthographic projection of the third opening203on the base substrate2001, and the area of the orthographic projection of the third opening203on the base substrate2001is more than the area of the orthographic projection of the fourth opening204on the base substrate2001.

The array substrate provided by the embodiment illustrated inFIG.2Btakes a case where the surface of the pixel defining portion (the surface of the PDL for forming the opening) is an inclined surface as an example for description, which is not limited thereto. In the actual process, the formed pixel defining portion may be provided with a surface of another shape such as a curved surface. The pixel defining portion includes at least one of the first pixel defining portion, the second pixel defining portion, the third pixel defining portion, and the fourth pixel defining portion. The opening includes at least one of the first opening, the second opening, the third opening, and the fourth opening.

The array substrate provided by the embodiment illustrated inFIG.2Btakes a case where both the slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202and the slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202are reduced to be equal or approximately equal to the slope angle θ3or the slope angle θ4as an example for description. In other embodiments, either the slope angle of the portion021of the first pixel defining portion21that is located between the first opening201and the second opening202or the slope angle of the portion022of the second pixel defining portion22that is located between the first opening201and the second opening202may be reduced to be equal or approximately equal to the slope angle θ3or the slope angle θ4.

FIG.3Ais a schematic diagram of a pixel arrangement of an array substrate provided by an embodiment of the present disclosure. As illustrated inFIG.3A, the first opening201, the second opening202, the third opening203, and the fourth opening204define a light-emitting region of the first sub-pixel S1, a light-emitting region of the second sub-pixel S2, a light-emitting region of the third sub-pixel S3, and a light-emitting region of the fourth sub-pixel S4, respectively. The first sub-pixel S1, the third sub-pixel S3, and the fourth sub-pixel S4are sub-pixels of different colors, and the first sub-pixel S1and the second sub-pixel S2are sub-pixels of the same color. For example, the first sub-pixel S1is a green sub-pixel, the third sub-pixel S3is a blue sub-pixel, and the fourth sub-pixel S4is a red sub-pixel. For example, as illustrated inFIG.3A, the embodiment takes a case where the first opening201and the second opening202are of a pentagon and the third opening203and the fourth opening204are of a hexagon as an example for description, which is not limited thereto. The shapes of the first opening201, the second opening202, the third opening203, and the fourth opening204may be determined as required. For example, referring toFIG.3AandFIG.2B,FIG.3Atakes a case where the opening refers to a top portion tp of the opening as an example, which is not limited thereto.

For example, in the embodiment of the present disclosure, the sub-pixel may be a minimum unit capable of being independently controlled for light outgoing. In the case where the display device is an OLED display device, the sub-pixel may include an OLED and a control element for controlling the OLED to emit light. In the case where the display device is a liquid crystal display device, the sub-pixel may include a pixel electrode, a liquid crystal layer, a common electrode, and a control element for controlling rotation of liquid crystal molecules in the liquid crystal layer. The control element includes a thin film transistor (TFT) and the like. The sub-pixel includes at least one of the first sub-pixel S1, the second sub-pixel S2, the third sub-pixel S3, and the fourth sub-pixel S4.

FIG.3Bis a sectional view of an array substrate provided by an embodiment of the present disclosure. As illustrated inFIG.3B, a TFT3123array may be disposed on the base substrate100.FIG.3Bmerely illustrates one TFT3123. The base substrate100may be a flexible substrate such as a polyimide (PI) substrate, which is not limited thereto. The TFT3123may include an active layer, a gate electrode, a gate insulation layer, a source electrode, a drain electrode and the like. As illustrated inFIG.3B, a buffer layer111, an active layer112, a gate insulation layer113, a gate electrode114, an interlayer dielectric layer115and a source-drain layer116may be sequentially arranged on the base substrate100, the source-drain layer116includes a source electrode1161and a drain electrode1162, and the source electrode1161and the drain electrode1162are spaced apart from each other and may be connected to the active layer112through via hole, respectively. The portion of the active layer112connected to the source electrode1161is a source portion, and the portion of the active layer112connected to the drain electrode1162is a drain portion, for example, the portion between the source portion and the drain portion is a semiconductor, and both the source portion and the drain portion are a conductor. For example, the material of the semiconductor includes polycrystalline silicon, and the portion between the source portion and the drain portion includes a conductor converted from a polycrystalline silicon such as heavily-doped polycrystalline silicon. A planarization layer117may be disposed on the TFT3123, a component to-be-encapsulated2123may be disposed on the planarization layer117, and the component to-be-encapsulated may be an OLED. The component to-be-encapsulated2123may include a first electrode121, a light-emitting functional layer122, and a second electrode123; and the first electrode121may be electrically connected to the drain electrode1162through a via hole penetrating the planarization layer117. A PDL118may be disposed on the first electrode121. The PDL118is provided with an opening penetrating the PDL118. The light-emitting functional layer122may include a light-emitting layer, and may further include other functional layers such as at least one of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer, which is not limited thereto. An encapsulation thin film1123may be formed on the component to-be-encapsulated2123. The encapsulation thin film1123includes a first thin film1101, a second thin film1102, and a third thin film1103that are sequentially away from the base substrate100, and the second thin film1102is disposed between the first thin film1101and the third thin film1103. The encapsulation thin film1123covers the component to-be-encapsulated2123. For example, the first thin film1011and the third thin film1003may be inorganic thin films such as SiNx, SiOx, SiCxNy and other inorganic oxides, which are not limited thereto. For example, the second thin film102may be an organic thin film such as resin and other organic substances, which is not limited thereto.

For example, the PDL211in the array substrate provided by the embodiment of the present disclosure may be the PDL118illustrated inFIG.3B, which is not limited thereto. The array substrate provided by the embodiment may alleviate or prevent the problem of mura of the second thin film1102in the encapsulation thin film.

FIG.4Ais a top view of an array substrate provided by another embodiment of the present disclosure. The array substrate illustrated inFIG.4Aincludes a PDL215. Compared the PDL215with the PDL211illustrated inFIG.2A, the differences lie in that the PDL215includes a first opening251and a second opening252, the shape of the first opening251is different from that of the first opening201illustrated inFIG.2A, and the shape of the second opening252is different from that of the second opening202illustrated inFIG.2A. As illustrated inFIG.4A, at least one of a side of the first opening251close to the second opening252and a side of the second opening252close to the first opening251includes a distance adjustment portion510.FIG.4Atakes a case where the side of the first opening251close to the second opening252and the side of the second opening252close to the first opening251respectively include the distance adjustment portion510as an example for description. As illustrated inFIG.4A, the first pixel defining portion51is configured to define the first opening251, the second pixel defining portion52is configured to define the second opening252, the third pixel defining portion53is configured to define the third opening253, and the fourth pixel defining portion54is configured to define the fourth opening254.

InFIG.4A, the closed dashed box refers to a bottom portion of the opening, and the closed solid box close to the dashed box refers to a top portion of the opening. The portion of the PDL which is between the bottom portion bp and the top portion tp of each opening and defines the boundary of the opening is the pixel defining portion. The opening includes any one of the first opening251, the second opening252, the third opening253, and the subsequently mentioned fourth opening254. The pixel defining portion includes any one of the first pixel defining portion51, the second pixel defining portion52, the third pixel defining portion53, and the subsequently mentioned fourth pixel defining portion54. For example, the distance between the openings is a distance between opposite edges of top portions of the openings. For example, the embodiment of the present disclosure takes a case where the top portion of the opening corresponds to the light-emitting region of the sub-pixel as an example for description, which is not limited thereto.

For example, the distance adjustment portion510is configured such that a distance between the first opening251and the second opening252in a direction parallel with the base substrate gradually changes in a direction intersecting with an arrangement direction of the first opening251and the second opening252. For example, the distance between the first opening251and the second opening252gradually increases from the center to two sides. For example, the distance between the first opening251and the second opening252gradually decreases and then gradually increases along the direction perpendicular to the arrangement direction of the first opening251and the second opening252. The arrangement direction of the first opening251and the second opening252may be a vertical direction, and the direction perpendicular to the arrangement direction of the first opening251and the second opening252may be a horizontal direction.

For example, the third opening253and the fourth opening243of the PDL215illustrated inFIG.4Amay refer to the third opening203and the fourth opening203of the PDL211illustrated inFIG.2A, respectively.

FIG.4Bis a schematic diagram of a pixel arrangement of an array substrate provided by an embodiment of the present disclosure. As illustrated inFIG.4B, the first opening251, the second opening252, the third opening253, and the fourth opening254define a light-emitting region of the first sub-pixel S11, a light-emitting region of the second sub-pixel S12, a light-emitting region of the third sub-pixel S13, and a light-emitting region of the fourth sub-pixel S14, respectively; the first sub-pixel S11, the third sub-pixel S13, and the fourth sub-pixel S14are sub-pixels of different colors, and the first sub-pixel S11and the second sub-pixel S12are sub-pixels of the same color. For example, the first sub-pixel S11is a green sub-pixel, the third sub-pixel S13is a blue sub-pixel, and the fourth sub-pixel S14is a red sub-pixel.

According to the array substrate provided by the embodiment of the present disclosure, because the shapes of the first opening251and the second opening252are changed, the distance between opposite boundaries of the first opening251and the second opening252changes and the distance between the light-emitting regions of the first sub-pixel S11and the second sub-pixel S12correspondingly changes. Because the distance between the first opening251and the second opening252gradually increases from the center to the two sides, the flowability of the developing solution may be improved during the developing process of the manufacture of the PDL, thereby facilitating removal of the material of the PDL and reducing the slope angle of the portion of the PDL that is located between the first opening251and the second opening252.

As illustrated inFIG.4A, the first opening251and the second opening252are located between the third opening253and the fourth opening254, and the first opening251and the second opening252are arranged at two sides of a line CL234connecting a center C23of the third opening253with a center C24of the fourth opening254, respectively. A ratio of a slope angle of a part051of the first pixel defining portion51located between the first opening251and the second opening252to a slope angle of the third pixel defining portion53or a ratio of a slope angle of a part052of the second pixel defining portion52located between the first opening251and the second opening252to the slope angle of the third pixel defining portion53is in a range from 0.8 to 1.25. Further, for example, the ratio is more than or equal to 1 and less than 1.2, which is not limited thereto.

For example, as illustrated inFIG.4A, a ratio of the slope angle of the part051of the first pixel defining portion51located between the first opening251and the second opening252to a slope angle of the fourth pixel defining portion54or a ratio of the slope angle of the part052of the second pixel defining portion52located between the first opening251and the second opening252to the slope angle of the fourth pixel defining portion54is in a range from 0.8 to 1.25. Further, for example, the ratio is more than or equal to 1 and less than 1.2, which is not limited thereto.

The sectional view of the array substrate illustrated inFIG.4Amay refer toFIG.2Band related descriptions thereof and will not be repeated herein. The position of the section line may refer toFIG.2A.

For example, the first sub-pixel S11illustrated inFIG.4Band the first sub-pixel S1illustrated inFIG.3Aare the same in area but are different in shape, and the second sub-pixel S12illustrated inFIG.4Band the second sub-pixel S2illustrated inFIG.3Aare the same in area but are different in shape. For example, due to the diffraction effect during exposure, opposite positions of the opening regions of the first sub-pixel S11and the second sub-pixel S12inFIG.4Bare not a sharp corner, and are, for example, a rounded corner.

At least one embodiment of the present disclosure further provides a display device, including any one of the array substrate described above.

For example, the display device may be a display device such as a liquid crystal display, e-paper and an OLED display, and any product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop and a navigator including the above display device.

The PDL in the array substrate provided by the embodiment of the present disclosure and illustrated inFIG.4Amay be manufactured with the mask plate illustrated inFIG.5, and the PDL in the array substrate provided by the embodiment of the present disclosure and illustrated inFIG.2AandFIG.2Bmay be manufactured with the mask plate illustrated inFIG.6orFIG.7, such that the portion, located between the close sub-pixels, of the first pixel defining portion and/or second pixel defining portion has the smaller slope angle.

FIG.5is a top view of a mask plate provided by an embodiment of the present disclosure. The mask plate400includes: a pattern portion40and a filling portion41; the pattern portion40includes a first pattern401, a second pattern402, and a third pattern403; and the first pattern401is configured to form the first opening251, the second pattern402is configured to form the second opening252, and the third pattern403is configured to form the third opening253. For example, referring toFIG.4A, the PDL includes the first opening defining portion51configured to define the first opening251, the second opening defining portion52configured to define the second opening252, and the third opening defining portion53configured to define the third opening253. For example, every two of the first pattern401, the second pattern402, and the third pattern403are adjacent to each other and spaced apart from each other. For example, the filling portion41is located in a region other than the pattern portion40. For example, the filling portion41is at least located between every two of the first pattern401, the second pattern402, and the third pattern403. Either the pattern portion40or the filling portion41is configured to transmit light, and the other is configured to block light. As illustrated inFIG.5, at least one of a side of the first pattern401close to the second pattern402and a side of the second pattern402close to the first pattern401includes a protrusion45. Referring toFIG.4AandFIG.5, the protrusion45is configured such that at least one of a ratio of a slope angle of a part051of the first pixel defining portion51located between the first opening251and the second opening252to a slope angle of the third pixel defining portion53and a ratio of a slope angle of a part052of the second pixel defining portion52located between the first opening251and the second opening252to the slope angle of the third pixel defining portion53is in a range from 0.8 to 1.25. For example, the protrusion45is configured such that a distance between the first pattern401and the second pattern402gradually changes.

For example, as illustrated inFIG.5, the distance between the first pattern401and the second pattern402gradually increases from the center to two sides. According to the mask plate provided by the embodiment of the present disclosure, because the distance between the first pattern401and the second pattern402gradually changes, the distance between the first pattern401and the second pattern402may gradually increase. The first pattern401is configured to form the first opening of the PDL, i.e., the light-emitting region of the first sub-pixel, and the second pattern402is configured to form the second opening of the PDL, i.e., the light-emitting region of the second sub-pixel. Because the distance between the first pattern401and the second pattern402gradually increases from the center to the two sides, the mask plate provided by the embodiment can reduce the slope angle of the part of the first opening defining portion51located between the first opening and the second opening and/or the slope angle of the part of the second opening defining portion52located between the first opening and the second opening.

For example, as illustrated inFIG.5, the protrusion45is of a triangle, which is not limited thereto, as long as the protrusion45can allow the distance between the first pattern401and the second pattern402to gradually change from the center to the two sides. For the ease of comparison, the pentagonal dashed lines inFIG.5illustrate the light-emitting regions of the first sub-pixel S1and the second sub-pixel S2illustrated inFIG.3A. For example, as illustrated inFIG.5, the distance between the first pattern401and the second pattern402gradually increases from the center to the two sides. For example, the distance between the first pattern401and the second pattern402gradually decreases and then gradually increases in a direction perpendicular to an arrangement direction of the first pattern401and the second pattern402. For example, the arrangement direction of the first pattern401and the second pattern402may be a vertical direction, and the direction perpendicular to the arrangement direction of the first pattern401and the second pattern402may be a horizontal direction.

As illustrated inFIG.5, the pattern portion40further includes a fourth pattern404. Every two of the fourth pattern404, the first pattern401, and the second pattern402are adjacent to each other. The filling portion41is further located between every two of the first pattern401, the second pattern402, and the fourth pattern404. For example, as illustrated inFIG.5, a minimum distance between the first pattern401and the second pattern402is less than a minimum distance between the first pattern401and the third pattern403, and less than a minimum distance between the first pattern401and the fourth pattern404; and the first pattern401and the second pattern402are located between the third pattern403and the fourth pattern404and arranged at two sides of a line CL434connecting a center C43of the third pattern403with a center C44of the fourth pattern404, respectively. The first pattern401and the second pattern402may be configured to form the first opening251and the second opening252of the PDL illustrated inFIG.4A, respectively; and the third pattern403and the fourth pattern404may be configured to form the third opening253and the fourth opening254of the PDL illustrated inFIG.4A, respectively. As illustrated inFIG.4A, the PDL further includes a fourth opening defining portion54, and the fourth opening defining portion54is configured to define the fourth opening254. For example, the protrusion45is further configured such that at least one of a ratio of the slope angle of the part051of the first opening defining portion51located between the first opening251and the second opening252to a slope angle of the fourth opening defining portion54for defining the fourth opening254and a ratio of the slope angle of the part052of the second opening defining portion52located between the first opening251and the second opening252to the slope angle of the fourth opening defining portion54is in a range from 0.8 to 1.25. Further, for example, the ratio is more than or equal to 1 and less than 1.2.

FIG.6is a top view of a mask plate provided by an embodiment of the present disclosure. As illustrated inFIG.6, the mask plate500includes: a pattern portion50and a filling portion5151; and the pattern portion50includes a first pattern501, a second pattern502, and a third pattern503. For example, every two of the first pattern501, the second pattern502, and the third pattern503are adjacent to each other and spaced apart from each other. The filling portion5151is located in a region other than the pattern portion50. For example, the filling portion5151is at least located between every two of the first pattern501, the second pattern502, and the third pattern503. Either the pattern portion50or the filling portion5151is configured to transmit light, and the other is configured to block light. The mask plate500is configured to form the PDL illustrated inFIG.2A. As illustrated inFIG.2A, the PDL is provided with the first opening201, the second opening202, and the third opening203, and the PDL includes the first pixel defining portion21, the second pixel defining portion22, and the third pixel defining portion23. At least one of a side of the first pattern501close to the second pattern502and a side of the second pattern502close to the first pattern501includes a protrusion55; and the protrusion55is configured such that at least one of the ratio of the slope angle of the part021of the first opening defining portion21located between the first opening201and the second opening202to the slope angle of the third opening defining portion23or the ratio of the slope angle of the portion022of the second opening defining portion22located between the first opening201and the second opening202to the slope angle of the third opening defining portion23is in a range from 0.8 to 1.25. For example, the protrusion55and a part of the filling portion5151form an optical compensation portion56. The optical compensation portion56is configured to transmit a part of light irradiated onto the optical compensation portion56in a diffractive manner. Because a part of light may transmit through the optical compensation portion56during the exposure, compared with a case where the optical compensation portion56is not provided, a part of material of the portion of the PDL for forming the opening at the optical compensation portion56may be removed, thereby reducing the slope angle of the portion of the PDL for forming the opening.

For example, the first pattern501and the second pattern502may be configured to form the first opening201and the second opening202of the PDL illustrated inFIG.2AandFIG.2B, respectively; and the third pattern403and the fourth pattern404may be configured to form the third opening203and the fourth opening204of the PDL illustrated inFIG.2AandFIG.2B, respectively.

As illustrated inFIG.6, the protrusion55includes a plurality of sub-protrusions551, and the plurality of sub-protrusions551are sequentially arranged in a direction intersecting with an arrangement direction of the first pattern401and the second pattern402. For example, as illustrated inFIG.6, the first pattern501and the second pattern502are arranged along a vertical direction, and the plurality of sub-protrusions551are arranged along a horizontal direction, which is not limited thereto. The mask plate illustrated inFIG.6may be used to form the first opening201and the second opening202illustrated in the top view ofFIG.2B. For example, as illustrated inFIG.6, the plurality of sub-protrusions551are sequentially arranged along an extension direction of each of a boundary of the first pattern501and a boundary of the second pattern502that are opposite to each other.FIG.6illustrates the boundary511of the first pattern501that is opposite to the second pattern502, and the boundary512of the second pattern502that is opposite to the first pattern501. For example, as illustrated inFIG.6, the boundary, opposite to the second pattern502, of the first pattern501is of the zigzag shape, and the boundary521, opposite to the first pattern501, of the second pattern502is of the zigzag shape. For example, as illustrated inFIG.6, the plurality of sub-protrusions551of the first pattern501are sequentially arranged along the extension direction of the boundary511, opposite to the second pattern502, of the first pattern501, and the plurality of sub-protrusions551of the second pattern502are sequentially arranged along the boundary512, opposite to the first pattern501, of the second pattern502.

As illustrated inFIG.6, the pattern portion50further includes a fourth pattern504, and every two of the fourth pattern504, the first pattern501, and the second pattern502are adjacent to each other. For example, a minimum distance between the first pattern501and the second pattern502is less than a minimum distance between the first pattern501and the third pattern503, and less than a minimum distance between the first pattern501and the fourth pattern504. For example, the first pattern501and the second pattern502are located between the third pattern503and the fourth pattern504and arranged at two sides of a line CL534connecting a center C53of the third pattern503with a center C54of the fourth pattern504, respectively. The first pattern501and the second pattern502may be configured to form the first opening201and the second opening202of the PDL illustrated inFIG.2AandFIG.2B, respectively; and the third pattern503and the fourth pattern504may be configured to form the third opening203and the fourth opening204of the PDL illustrated inFIG.2AandFIG.2B, respectively. For example, the minimum distance and/or the maximum distance between the first pattern501and the second pattern502is less than the minimum distance between the first pattern501and the third pattern503, and less than the minimum distance between the first pattern501and the fourth pattern504.

For example, each sub-protrusion551has a size less than a resolution of an exposure machine. The exposure intensity of the PDL material at the corresponding position of the optical compensation portion may be between the case where the position is shielded with a mask plate and the case where the position is not shielded with a mask plate, thereby reducing the slope angle of the PDL. For example, as illustrated inFIG.6, a part of the filling portion5151is provided between adjacent sub-protrusions551. The light shielding portions and the light transmission portions are alternately arranged, such that the light irradiated onto the optical compensation portion56is diffracted, thereby reducing the slope angle of the portion of the PDL that is located between the first opening201and the second opening202and forming the first opening201and/or the second opening202.

For example, as illustrated inFIG.6, each sub-protrusion551includes a triangle. For example, at least one of a bottom length and a height of the triangle is less than or equal to 1.5 μm.

For example, the pentagonal dashed line illustrated inFIG.6refers to the first opening201or the second opening202of the PDL formed by the mask plate illustrated inFIG.6; and the protrusion55of the first pattern501includes a portion protruded from the first opening201and a portion located in the first opening201, which is not limited thereto. For example, as illustrated inFIG.6, the protrusion55of the second pattern502includes a portion protruded from the second opening202and a portion located in the second opening202, which is not limited thereto. As illustrated inFIG.6, the side of the first pattern501close to the second pattern502and the side of the second pattern502close to the first pattern501are formed into a zigzag shape.

FIG.7is a top view of a mask plate provided by another embodiment of the present disclosure. The differences between the mask plate600provided by the embodiment and the mask plate500illustrated inFIG.6lie in: the mask plate600includes a first pattern601and a second pattern602; at least one of a side of the first pattern601close to the second pattern602and a side of the second pattern602close to the first pattern601includes a protrusion65; the protrusion65includes a plurality of sub-protrusions651; and each sub-protrusion651includes a rectangle. For example, at least one of a length and a width of the rectangle is less than or equal to 1.5 μm. As illustrated inFIG.7, the boundary of each of the side of the first pattern601close to the second pattern602and the side of the second pattern602close to the first pattern601is formed into a square waveform66.

For example, the pentagonal dashed line illustrated inFIG.7refers to the first opening201or the second opening202of the PDL formed by the mask plate illustrated inFIG.7; and the protrusion65of the first pattern601includes a portion protruded from the first opening201and a portion located in the first opening201, which is not limited thereto. For example, as illustrated inFIG.7, the protrusion65of the second pattern602includes a portion protruded from the second opening202and a portion located in the second opening202, which is not limited thereto.

For example, in some embodiments, the material of the PDL includes a positive PR, the pattern portion is the light transmission portion, and the filling portion is the light shielding portion, which is not limited thereto.

For example, in some embodiments, the material of the PDL includes a negative PR, the pattern portion is the light shielding portion, and the filling portion is the light transmission portion.

At least one embodiment of the present disclosure further provides a manufacturing method of an array substrate, which includes manufacturing a PDL with any one of the mask plates described above.

For example, in the embodiment of the present disclosure, the manufacturing method of the PDL includes: forming a pixel defining thin film, exposing the pixel defining thin film with the mask plate, developing the pixel defining thin film, forming the PDL and forming openings penetrating the PDL.

It is to be noted that, in the embodiment of the present disclosure, the optical compensation portion is not limited to the shape illustrated inFIG.6andFIG.7.

It should be noted that, for the purpose of clarity only, in accompanying drawings for illustrating the embodiment(s) of the present disclosure, the thickness and size of a layer or a structure may be enlarged. However, it should be understood that, in the case where a component such as a layer, film, area, substrate or the like is referred to be “on” or “under” another component, it may be directly on or under the another component or a component is interposed therebetween.

In the embodiments of the present disclosure, patterning or a patterning process may include only a photolithography process, or include a photolithography process and an etching process, or may include other processes for forming a predetermined pattern, such as a printing process, an inkjet process, and the like. A photolithography process includes forming a pattern by processes such as film forming, exposure, and development etc., by using photoresist, mask, exposure machine etc. The corresponding patterning process may be selected according to the structure formed in the embodiments of the present disclosure.

In case of no conflict, features in one embodiment or in different embodiments can be combined.

The above are the embodiments of the present disclosure only without construing any limitation to the scope of the present disclosure; any of those skilled in related arts may easily conceive variations and substitutions in the technical scopes disclosed by the present disclosure, which should be encompassed in protection scopes of the present disclosure. Therefore, the scopes of the present disclosure should be defined in the appended claims.