CN112071892B - Display panel and display device - Google Patents
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- CN112071892B CN112071892B CN202010996999.5A CN202010996999A CN112071892B CN 112071892 B CN112071892 B CN 112071892B CN 202010996999 A CN202010996999 A CN 202010996999A CN 112071892 B CN112071892 B CN 112071892B
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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
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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Abstract
The invention provides a display panel and a display device, relates to the technical field of display screens, and aims to solve the technical problem that the display effect of the display panel is poor. The display panel comprises a display panel and is characterized in that a pixel limiting layer is arranged on an array substrate of the display panel, a first pixel limiting layer corresponding to a display area of the array substrate in the pixel limiting layer is provided with a first supporting column, and a second pixel limiting layer corresponding to a non-display area of the array substrate is provided with a second supporting column; the first annular grooves in the first pixel limiting layer correspond to one another and surround one first supporting column, and the second annular grooves in the second pixel limiting layer correspond to one another and surround one second supporting column; the first supporting column and the second supporting column are limited to flow to the periphery by the first annular groove and the second annular groove, so that the first supporting column and the second supporting column are consistent in height after being cured, the height difference between the first supporting column and the second supporting column is reduced, newton rings caused by bending of an encapsulating layer on the supporting column are reduced or avoided, and the display effect is improved.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a display panel and a display device.
Background
An Organic Light-Emitting Diode (OLED) display panel is a self-luminous display panel, and has the advantages of lightness, thinness, low power consumption, high resolution, high contrast, high response speed, wide viewing angle, wide temperature characteristics, and the like, and is widely applied to display devices.
The OLED display panel generally includes an array substrate, an OLED device disposed on the array substrate, and an encapsulation layer for encapsulating the OLED device, where the OLED device includes a pixel defining layer and a plurality of Support Pillars (SPC) disposed on the pixel defining layer, and the support pillars and the pixel defining layer may be formed simultaneously, for example, an organic material layer is formed on an anode of the OLED, the organic material layer is masked by using a Half Tone Mask (HTM), and the support pillars and the pixel defining layer are formed through processes of pre-baking, exposure, development, post-baking, annealing, and the like.
However, in the manufacturing process of the display panel, the height of the supporting pillars is not uniform, which causes the package layer of the OLED display panel to bend or warp, and further causes newton's rings on the display panel, thereby affecting the display effect.
Disclosure of Invention
In view of the foregoing problems, embodiments of the present invention provide a display panel and a display device, which are used to reduce or prevent the display panel from generating newton rings, thereby improving the display effect.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in a first aspect, an embodiment of the present invention provides a display panel, including an array substrate, a pixel defining layer disposed on the array substrate, and a plurality of supporting pillars disposed on the pixel defining layer; the pixel defining layer comprises a first pixel defining layer corresponding to the display area of the array substrate and a second pixel defining layer corresponding to the non-display area of the array substrate; the plurality of support columns include a plurality of first support columns disposed on the first pixel defining layer, and a plurality of second support columns disposed on the second pixel defining layer; a plurality of first annular grooves are arranged in the first pixel limiting layer, the first annular grooves correspond to the first supporting columns one by one, and each first annular groove surrounds one first supporting column; the second pixel limiting layer is provided with a plurality of second annular grooves, the second annular grooves correspond to the second supporting columns one to one, and each second annular groove surrounds one second supporting column.
In the display panel provided by the embodiment of the invention, the array substrate is provided with the pixel limiting layer, the first pixel limiting layer of the pixel limiting layer, which corresponds to the display area of the array substrate, is provided with the first supporting column, and the second pixel limiting layer, which corresponds to the non-display area of the array substrate, is provided with the second supporting column; the first annular grooves in the first pixel limiting layer correspond to the first supporting columns one by one and are arranged around the corresponding first supporting columns, and the second annular grooves in the second pixel limiting layer correspond to the second supporting columns one by one and are arranged around one second supporting column; through setting up first ring channel and second ring channel, when the graphics process was handled, restriction first support column and second support column were to flowing around to make the height after first support column and the solidification of second support column unanimous, reduce the difference in height between first support column and the second support column, thereby alleviate or avoid the encapsulation layer on the support column crooked or warpage, and then alleviate or avoid display panel to appear newton ring, improve display panel's display effect.
In the display panel as described above, there is a first distance between the first annular groove and the first support column located in the first annular groove, there is a second distance between the second annular groove and the second support column located in the second annular groove, and the first distance and the second distance are equal.
In the display panel as described above, the first annular groove is a first through hole penetrating the first pixel defining layer, and the second annular groove is a second through hole penetrating the second pixel defining layer.
In the display panel as described above, orthographic projections of the first pixel defining layer and the first support pillar located in the same first annular groove on the array substrate coincide; the second pixel limiting layer and the second supporting column which are located in the same second annular groove coincide with each other in orthographic projection on the array substrate.
In the display panel as described above, a space is provided between the first pixel defining layer and the second pixel defining layer.
In the display panel as described above, a portion of the second pixel defining layer directly opposite to each of the second supporting columns remains, and the remaining portion is removed.
In the display panel as described above, the pixel defining layer and the plurality of support pillars are formed in a single patterning process.
In the display panel as described above, the width of the first annular groove is greater than or equal to 2 μm.
In a second aspect, an embodiment of the present invention further provides a display panel, which includes an array substrate, a pixel defining layer disposed on the array substrate, and a plurality of supporting pillars disposed on the pixel defining layer; the pixel defining layer comprises a first pixel defining layer corresponding to the display area of the array substrate and a second pixel defining layer corresponding to the non-display area of the array substrate; the first pixel defining layer and the second pixel defining layer are of unitary construction.
In the display panel provided by the embodiment of the invention, the array substrate comprises a display area and a non-display area, the array substrate is provided with the pixel limiting layer, the first pixel limiting layer corresponding to the display area and the second pixel limiting layer corresponding to the non-display area in the pixel limiting layer are integrated into a whole, so that the supporting columns on the first pixel limiting layer and the supporting columns on the second pixel limiting layer are both arranged on the whole pixel limiting layer, and the supporting columns flow around the same direction during the graphic process treatment, so that the cured heights of the supporting columns are consistent, the bending or warping of the packaging layer on the supporting columns is reduced or avoided, the Newton rings of the display panel are reduced or avoided, and the display effect of the display panel is improved.
In a third aspect, an embodiment of the present invention further provides a display panel, including an array substrate, a pixel defining layer disposed on the array substrate, and a plurality of supporting pillars disposed on the pixel defining layer; the pixel defining layer comprises a first pixel defining layer corresponding to the display area of the array substrate and a second pixel defining layer corresponding to the non-display area of the array substrate; the plurality of support columns include a plurality of first support columns disposed on the first pixel defining layer, and a plurality of second support columns disposed on the second pixel defining layer; a plurality of openings for accommodating pixels are formed in the first pixel limiting layer, and one first supporting column is arranged at the middle position of two adjacent openings; the part of the second pixel definition layer opposite to each second supporting column is reserved, and the rest part is removed.
In the display panel provided by the embodiment of the invention, the array substrate comprises a display area and a non-display area, the array substrate is provided with a pixel limiting layer, a first pixel limiting layer corresponding to the display area in the pixel limiting layer is provided with an opening for pixel deposition, and a first support column is arranged in the middle of two adjacent openings; the part of the second pixel limiting layer corresponding to the second supporting column in the pixel limiting layer corresponding to the non-display area is reserved, and the rest part is removed; when the patterning process is carried out, the first supporting column reduces the supporting column to flow to the periphery through the two adjacent openings, so that the height difference between the first supporting column and the second supporting column is reduced, the bending or warping of the packaging layer on the supporting column is reduced or avoided, the Newton ring of the display panel is reduced or avoided, and the display effect of the display panel is improved.
In the display panel as described above, the first pixel defining layer has a rectangular shape; the plane along being on a parallel with the surface of the array substrate is the cross section, the cross sectional shape of the first supporting column is rectangular, and an included angle between the central line of the rectangle and the edge of the first pixel limiting layer is 45 degrees.
In a fourth aspect, embodiments of the present invention further provide a display device, including the display panel, where the display device includes the display panel, so that the display device has advantages of the display panel, and can prevent a display area of the display device from appearing newton rings, thereby improving a display effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a first structure of a display panel according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is a diagram illustrating a second structure of a display panel according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken at B-B of FIG. 3;
FIG. 5 is a schematic diagram of a third structure of a display panel according to an embodiment of the invention;
fig. 6 is a sectional view at C-C in fig. 5.
Description of the reference numerals:
10: an array substrate; 11: a display area;
12: a non-display area; 20: a pixel defining layer;
21: first pixel defining layer 22: a second pixel defining layer;
23: a first annular groove; 30: a support column;
31: a first support column; 32: a second support column;
40: and (4) opening.
Detailed Description
Embodiments of the present invention provide a display panel, which improves differences between pixel definition layers corresponding to support columns located in different regions, so that the flow states of the support columns are close to each other, and a height difference between the support columns is reduced, so that bending or warping of an encapsulation layer on the support columns is reduced or avoided, and then newton rings are reduced or avoided on the display panel, and a display effect of the display panel is improved.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 and 2, the display panel is generally an OLED display panel, and includes an array substrate 10, the array substrate 10 includes a display area 11 and a non-display area 12, wherein the non-display area 12 may be disposed around the display area 11, as shown in fig. 2, the left area is the non-display area 12 of the array substrate, the right area is the display area 11 of the array substrate, and the display area 11 and the non-display area 12 may be an integrated structure.
The array substrate 10 may be a Thin Film Transistor (TFT) array substrate, such as a Low Temperature Polysilicon (LTPS) TFT array substrate, an amorphous silicon (a-Si) TFT array substrate, or an Oxide (Oxide) TFT array substrate.
A Pixel Definition Layer (PDL) 20 is disposed on the array substrate 10, the pixel definition layer 20 is used for accommodating pixels, a plurality of openings for accommodating pixels are formed in the pixel definition layer 20, and the pixels can be deposited in the openings, for example, the pixels can be deposited in the openings 40 in the first pixel definition layer 21 by vacuum evaporation.
In the embodiment of the present invention, the pixel defining layer 20 includes a first pixel defining layer 21 and a second pixel defining layer 22, and the first pixel defining layer 21 corresponds to the display region 11 of the array substrate 10, that is, the first pixel defining layer 21 is located above the display region 11 of the array substrate 10. The first pixel defining layer 21 may cover the entire display area. The second pixel defining layer 22 corresponds to the non-display region 12 of the array substrate 10, i.e., the second pixel defining layer 22 is located on the non-display region 12 of the array substrate 10.
It should be noted that the first pixel defining layer 21 and the second pixel defining layer 22 may be connected such that the first pixel defining layer 21 and the second pixel defining layer 22 form an integral structure; a space may also be provided between the first pixel defining layer 21 and the second pixel defining layer 22. In the embodiment of the present invention, the first pixel defining layer 21 and the second pixel defining layer 22 are disposed at an interval.
The pixel defining layer 20 is provided with a plurality of supporting columns 30, and the cross section of each supporting column 30 is a plane parallel to the surface of the pixel defining layer 20, and the cross section of each supporting column 30 can be circular, oval, quadrilateral or other polygons. The supporting columns 30 may be gradually contracted in a direction away from the pixel defining layer 20 in a direction perpendicular to the surface of the pixel defining layer 20.
The plurality of supporting pillars 30 may support a mask of pixels, so as to prevent the mask from contacting the pixels when the mask is removed, thereby ensuring the quality of the pixels, and may support a cover plate of the encapsulation layer, such as a glass cover plate, so as to prevent the pixel definition layer 20 and the pixels located in the pixel definition layer 20 from being pressed. The array substrate 10 and the glass cover plate may be bonded by Frit (Frit).
The plurality of support columns 30 includes a plurality of first support columns 31 and a plurality of second support columns 32, the first support columns 31 being disposed on the first pixel defining layer 21, and the second support columns 32 being disposed on the second pixel defining layer 22. The plurality of supporting pillars 30 and the pixel defining layer 20 may be formed by a single patterning process, that is, the plurality of supporting pillars 30 and the pixel defining layer 20 may be formed at the same time, so as to reduce the number of manufacturing steps of the display panel.
In one possible example, the pixel defining layer 20 and the plurality of support columns 30 are formed by photolithography. Specifically, an organic material layer with a certain thickness is formed on the array substrate 10, the organic material layer may be subjected to pre-baking, then the organic material layer is exposed by using a halftone mask, a pixel defining layer 20 and a plurality of supporting pillars 30 are formed through a developing process, and finally the pixel defining layer 20 and the plurality of supporting pillars 30 are cured through post-baking, annealing and other processes.
The organic material layer may be one of polyimide, polymethyl methacrylate (PMMA) photoresist, polyimide photoresist, and silicone photoresist.
With continued reference to fig. 1 and 2, a plurality of first annular grooves 23 are disposed in the first pixel defining layer 21, the number of the first annular grooves 23 is the same as that of the first support pillars 31, and each of the first annular grooves 23 corresponds to one of the first support pillars 31 and is disposed around the first support pillar 31. A plurality of second annular grooves are disposed in the second pixel defining layer 22, the number of the second annular grooves is the same as that of the second supporting pillars 32, and each second annular groove corresponds to one second supporting pillar 32 and surrounds the second supporting pillar 32.
The first annular groove 23 may be a first through hole penetrating the first pixel defining layer 21, and the second annular groove may also be a second through hole penetrating the second pixel defining layer 22, so that on one hand, the first annular groove 23, the second annular groove, the pixel defining layer 20, and the plurality of supporting pillars 30 are formed by a half-tone mask one-step composition process, thereby further simplifying the manufacturing steps of the display panel; on the other hand, the first annular groove 23 spaces the region 21 of the first pixel defining layer corresponding to the first support column 31 from other regions, and the second annular groove spaces the region of the second pixel defining layer 22 corresponding to the second support column 32 from other regions.
That is, the first support pillar 31 and the first pixel defining layer 21 contacting the first support pillar 31 are relatively independent of each other, and the second support pillar 32 and the second pixel defining layer 22 contacting the second support pillar 32 are also relatively independent of each other, so that the first support pillar 31 and the second support pillar 32 are difficult to flow around during the patterning process, and the height difference between the first support pillar 31 and the second support pillar 32 is reduced.
It should be noted that the width of the first annular groove 23 may be greater than or equal to 2 μm, for example, the width of the first annular groove 23 may be any value of 2-3 μm, and thus the first annular groove 23 may be processed by photolithography. The opening direction of the first annular groove 23 is toward the first support column 31, and the width of the first annular groove refers to the distance between the two opposing side walls in the first annular groove 23.
The distance between the first annular groove 23 and the first support column 31 located in the first annular groove 23 is a first distance, and the distance between the second annular groove and the second support column 32 located in the second annular groove is a second distance, the first distance and the second distance being equal, that is, the first pixel defining layer 21 located in the first annular groove 23 is substantially the same as the second pixel defining layer 22 located in the first annular groove 23.
It should be noted that, taking the surface parallel to the array substrate 10 as a plane as a cross section, the cross sections of the first support pillars 31 and the second support pillars 32 may be rectangular, the cross sections of the first annular groove 23 and the second annular groove may be rectangular, the side of the first support pillar 31 is parallel to the side of the first annular groove 23, the side of the second support pillar 32 is parallel to the side of the second annular groove, the first distance is a distance between the side of the first support pillar 31 and a corresponding side of the first annular groove 23, and the second distance is a distance between the side of the second support pillar 32 and a corresponding side of the second annular groove.
The orthographic projection of the first pixel defining layer 21 in the first annular groove 23 and the first supporting column 31 on the array substrate 10 coincides, and the orthographic projection of the second pixel defining layer 22 in the second annular groove and the orthographic projection of the second supporting column 32 on the array substrate 10 coincide, that is, the cross-sectional shapes of the first pixel defining layer 21 and the first supporting column 31 in the same first annular groove 23 coincide, and the cross-sectional shapes of the second pixel defining layer 22 and the second supporting column 32 in the same second annular groove coincide. With such an arrangement, on one hand, the first support column 31 and the second support column 32 are convenient to mold, and on the other hand, the first support column 31 and the second support column 32 are limited in flowing to the periphery, so that the heights of the first support column 31 and the second support column 32 after curing are consistent.
It should be noted that the second pixel defining layer 22 in the non-display area 12 may be a plurality of spaced apart cubic blocks, and specifically, a portion of the second pixel defining layer 22 opposite to each of the second supporting pillars 32 is remained, and the rest portion is removed, i.e., only the region of the second pixel defining layer 22 contacting with each of the second supporting pillars 32 is remained. So arranged, on the one hand, the second pixel defining layer 22 does not completely cover the non-display area 12, and may be wired or otherwise configured over the non-display area 12; on the other hand, the first support columns 31 and the second support columns 32 are restricted from flowing around, and the height change of the first support columns 31 and the second support columns 32 before and after curing is reduced.
In the display panel provided by the embodiment of the invention, the array substrate 10 is provided with the pixel limiting layer 20, the first pixel limiting layer 21 of the pixel limiting layer 20, which corresponds to the display area 11 of the array substrate 10, is provided with the first supporting column 31, and the second pixel limiting layer 22, which corresponds to the non-display area 12 of the array substrate 10, is provided with the second supporting column 32; the first annular grooves 23 in the first pixel defining layer 21 correspond to the first support columns 31 one to one and are arranged around the corresponding first support columns 31, and the second annular grooves in the second pixel defining layer 22 correspond to the second support columns 32 one to one and are arranged around one second support column 32; by arranging the first annular groove 23 and the second annular groove, when the patterning process is performed, the first support column 31 and the second support column 32 are limited to flow around, so that the heights of the first support column 31 and the second support column 32 after curing are consistent, the height difference between the first support column 31 and the second support column 32 is reduced, newton's rings caused by bending or warping of the packaging layers on the plurality of support columns are reduced or avoided, and the display effect of the display panel is improved.
Example two
Referring to fig. 3 and 4, the display panel is generally an OLED display panel, and includes an array substrate 10, the array substrate 10 includes a display area 11 and a non-display area 12, wherein the non-display area 12 may be disposed around the display area 11, an area shown by a left dotted line in fig. 4 is the non-display area 12 of the array substrate, an area shown by a right dotted line in fig. 4 is the display area 11 of the array substrate, the display area 11 and the non-display area 12 may be an integrated structure, and the array substrate 10 may be a TFT array substrate 10.
The array substrate 10 is provided with a pixel defining layer 20 thereon, and the pixel defining layer 20 is used for depositing pixels. In the embodiment of the present invention, the pixel defining layer 20 includes a first pixel defining layer and a second pixel defining layer. The first pixel defining layer corresponds to the display region 11 of the array substrate 10, and an opening 40 is formed in the first pixel defining layer for receiving a pixel. The second pixel defining layer corresponds to the non-display region 12 of the array substrate 10, i.e., the second pixel defining layer is located in the non-display region 12 of the array substrate 10.
A plurality of support posts 30 are disposed on the pixel defining layer 20 for supporting a mask or an encapsulation layer of the pixels. By arranging that part of the supporting columns 30 of the plurality of supporting columns 30 are located in the first pixel definition layer 21 and the other part of the supporting columns 30 are located in the second pixel definition layer 22, the mask or the encapsulation layer can be effectively supported, and the influence on the display effect of the display panel caused by the fact that the mask or the encapsulation layer is sunken towards the direction of the array substrate 10 due to too large intervals of the supporting columns 30 is prevented.
Referring to fig. 3, the first pixel defining layer and the second pixel defining layer are of a unitary structure, that is, the pixel defining layer 20 is a unitary body, and the pixel defining layer 20 covers the entire array substrate 10, and thus the supporting columns 30 located above the display region 11 and the supporting columns 30 located above the non-display region 12 are disposed on the same pixel defining layer 20, so that the tendency of the supporting columns 30 to flow to the periphery is uniform, and thus the height of the supporting columns 30 after curing is uniform.
It should be noted that the first pixel defining layer may cover the entire display region 11, the second pixel defining layer may cover the entire non-display region 12, or may cover a portion of the non-display region 12, and the first pixel defining layer and the second pixel defining layer are connected to each other.
It should be noted that the pixel defining layer 20 and the plurality of supporting pillars 30 may be formed by one-time patterning, that is, the plurality of supporting pillars 30 and the pixel defining layer 20 may be formed at the same time, so as to reduce the manufacturing steps of the display panel.
In the display panel provided by the embodiment of the invention, the array substrate 10 includes the display area 11 and the non-display area 12, the pixel defining layer 20 is arranged on the array substrate 10, a first pixel defining layer corresponding to the display area 11 and a second pixel defining layer corresponding to the non-display area 12 in the pixel defining layer 20 are integrated into a whole, so that the supporting columns 30 on the first pixel defining layer and the supporting columns 30 on the second pixel defining layer are both arranged on the integrated pixel defining layer 20, and during the patterning process, the flowing directions of the supporting columns 30 are the same, so that the heights of the supporting columns 30 after curing are consistent, the occurrence of newton rings caused by bending or warping of the packaging layers on the supporting columns 30 is reduced or avoided, and the display effect of the display panel is improved.
EXAMPLE III
Referring to fig. 5 and 6, the display panel is generally an OLED display panel, and includes an array substrate 10, the array substrate 10 includes a display area 11 and a non-display area 12, the display area 11 is a right area of the array substrate 10 shown in fig. 6, the non-display area 12 is a left area of the array substrate 10, the display area 11 and the non-display area 12 may be an integral structure, wherein the non-display area 12 may be disposed around the display area 11, and the array substrate 10 may be a TFT array substrate.
The array substrate 10 is provided with a pixel defining layer 20, and the pixel defining layer 20 is used for accommodating pixels, for example, a plurality of openings for accommodating pixels are formed in the pixel defining layer 20. In the embodiment of the present invention, the pixel defining layer 20 includes a first pixel defining layer 21 and a second pixel defining layer 22.
The first pixel defining layer 21 corresponds to the display region 11 of the array substrate 10, and the second pixel defining layer 22 corresponds to the non-display region 12 of the array substrate 10, i.e., the second pixel defining layer 22 is located in the non-display region 12 of the array substrate 10.
A plurality of supports are disposed on the pixel defining layer 20, and in particular, the plurality of support columns 30 includes a plurality of first support columns 31 disposed on the first pixel defining layer 21, and a plurality of second support columns 32 disposed on the second pixel defining layer 22. The plurality of supporting pillars 30 and the pixel defining layer 20 may be formed by a one-step patterning process, that is, the plurality of supporting pillars 30 and the pixel defining layer 20 may be formed simultaneously, so as to reduce the number of manufacturing steps of the display panel.
It should be noted that the first pixel defining layer 21 and the second pixel defining layer 22 may be connected such that the first pixel defining layer 21 and the second pixel defining layer 22 form an integral structure; a space may also be provided between the first pixel defining layer 21 and the second pixel defining layer 22.
For example, in the embodiment of the present invention, a space is provided between the first pixel defining layer 21 and the second pixel defining layer 22, specifically, a portion of the second pixel defining layer 22 right next to each of the second supporting pillars 32 is remained, and the remaining portion is removed, that is, only a region of the second pixel defining layer 22 in contact with each of the second supporting pillars 32 is remained, so that the second pixel defining layer 22 is spaced from the first pixel defining layer 21.
It should be noted that the openings in the first pixel defining layer 21 extend through the plurality of openings 40 of the first pixel defining layer 21 to ensure that the pixels in the openings 40 can work properly. The first pixel defining layer 21, the second pixel defining layer 22, the first supporting pillars 31 and the second supporting pillars 32 can be formed at the same time, further simplifying the manufacturing steps of the display panel.
In the first pixel layer, one first support pillar 31 is disposed between two adjacent openings 40. As shown in fig. 5, the openings in the first pixel defining layer 21 are arranged in parallel, and one first support column 31 is provided at a position intermediate two adjacent openings. During the patterning process, the two openings 40 adjacent to each first support column 31 limit the flow of the first support column 31 to the openings, so as to limit the flow of the first support column 31 to the periphery, reduce the height variation of the first support column 31 before and after curing, and make the heights of the first support column 31 and the second support column 32 consistent.
In one possible example, the pixel defining layer 20 is rectangular, and has a cross section along a plane parallel to the surface of the array substrate 10, the cross-sectional shapes of the first support pillar 31 and the opening 40 are both rectangular, the first support pillar 31 and the opening 40 are arranged in parallel, and an angle between a center line of the rectangular first support pillar 31 and an edge of the first pixel defining layer 21 is 45 °.
In the display panel provided by the embodiment of the invention, the array substrate 10 comprises a display area 11 and a non-display area 12, a pixel limiting layer 20 is arranged on the array substrate 10, an opening 40 for pixel deposition is formed in a first pixel limiting layer 21, corresponding to the display area 11, in the pixel limiting layer 20, and a first support column 31 is arranged in the middle position of two adjacent openings 40; a portion of the pixel defining layer 20 corresponding to the second supporting columns 32 of the second pixel defining layer 22 corresponding to the non-display region 12 remains, and the remaining portion is removed; during the patterning process, the first supporting column 31 reduces the flowing of the supporting column to the periphery through two adjacent openings 40, so that the height difference between the first supporting column 31 and the second supporting column 32 is reduced, the occurrence of newton's rings caused by the bending or warping of the encapsulation layer on each supporting column 30 is reduced or avoided, and the display effect of the display panel is improved.
An embodiment of the present invention further provides a display device, including the display panel in the foregoing embodiment, because the display device includes the display panel, the display device has advantages of the display panel, and can prevent the display device from generating newton rings, and improve a display effect.
The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the system or component being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, the terms should not be construed as limiting the invention.
In the description of the present specification, references to "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The display panel is characterized by comprising an array substrate, a pixel defining layer arranged on the array substrate, and a plurality of supporting columns arranged on the pixel defining layer;
the pixel defining layer comprises a first pixel defining layer corresponding to the display area of the array substrate and a second pixel defining layer corresponding to the non-display area of the array substrate;
the plurality of support columns include a plurality of first support columns disposed on the first pixel defining layer, and a plurality of second support columns disposed on the second pixel defining layer;
a plurality of first annular grooves are arranged in the first pixel limiting layer, the first annular grooves correspond to the first supporting columns one by one, and each first annular groove surrounds one first supporting column;
the second pixel limiting layer is provided with a plurality of second annular grooves, the second annular grooves correspond to the second supporting columns one to one, and each second annular groove surrounds one second supporting column.
2. The display panel of claim 1, wherein the first annular groove has a first distance from the first support post in the first annular groove, wherein the second annular groove has a second distance from the second support post in the second annular groove, and wherein the first distance and the second distance are equal.
3. The display panel according to claim 1, wherein the first annular groove is a first through hole penetrating the first pixel defining layer, and wherein the second annular groove is a second through hole penetrating the second pixel defining layer.
4. The display panel according to claim 3, wherein the orthographic projection of the first pixel defining layer and the first support pillar on the array substrate in the same first annular groove coincide;
the second pixel definition layer located in the same second annular groove coincides with an orthographic projection of the second supporting column on the array substrate.
5. The display panel according to claim 3 or 4, wherein the pixel defining layer and the plurality of support columns are formed by a single patterning process.
6. The display panel according to claim 2 or 3, wherein the width of the first annular groove is greater than or equal to 2 μm.
7. A display device characterized by comprising the display panel according to any one of claims 1 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108807494A (en) * | 2018-07-06 | 2018-11-13 | 云谷（固安）科技有限公司 | Display base plate and preparation method thereof, display panel and display device |
| CN109950285A (en) * | 2019-03-28 | 2019-06-28 | 京东方科技集团股份有限公司 | A kind of array substrate and preparation method thereof, mask plate, display device |
| US20190305221A1 (en) * | 2018-03-30 | 2019-10-03 | Boe Technology Group Co., Ltd. | Pixel defining layer, display panel, fabricating method thereof, and display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190305221A1 (en) * | 2018-03-30 | 2019-10-03 | Boe Technology Group Co., Ltd. | Pixel defining layer, display panel, fabricating method thereof, and display device |
| CN108807494A (en) * | 2018-07-06 | 2018-11-13 | 云谷（固安）科技有限公司 | Display base plate and preparation method thereof, display panel and display device |
| CN109950285A (en) * | 2019-03-28 | 2019-06-28 | 京东方科技集团股份有限公司 | A kind of array substrate and preparation method thereof, mask plate, display device |
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