Display panel and display device

Abstract

The embodiment of the utility model provides a display panel and a display device. According to the display panel, a plurality of supporting columns arranged at intervals are arranged in a cover plate, so that a gap exists between a second substrate and a packaging layer, when the cover plate is impacted, impact force is buffered and released through the gap between the second substrate and the packaging layer, the impact force is prevented from being directly conducted to the packaging layer and then conducted to a light emitting unit, and the light emitting efficiency is improved. Therefore, stripping or other problems between the pixel electrode and the light-emitting layer are prevented, the problem of display failure caused by stripping or other problems between the pixel electrode and the light-emitting layer during a falling ball test is avoided, and the yield of the display panel is improved.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display panel and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays are widely used in various fields due to their advantages such as lightweight, wide viewing angle, low power consumption, fast response speed, low temperature resistance, high luminous efficiency, and the ability to fabricate flexible displays. With the development of display technology, products such as mobile phones, laptops, and tablets have increasingly higher requirements for drop resistance. Therefore, drop ball tests are conducted during the production process of OLED displays to test their impact resistance. However, in actual testing, it has been found that OLED displays can be damaged by drop balls, leading to display failure.

[0003] Therefore, existing OLED display devices have a technical problem where damage from falling balls during drop ball testing can cause display failure. Utility Model Content

[0004] This utility model provides a display panel and a display device to solve the technical problem that existing OLED display devices fail due to ball impact damage during ball drop testing.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a display panel is provided, comprising a display area, the display area including a light-emitting area and a non-light-emitting area, the display panel comprising:

[0006] First substrate;

[0007] A light-emitting functional layer is disposed on one side of the first substrate;

[0008] An encapsulation layer is disposed on the side of the light-emitting functional layer away from the first substrate;

[0009] A cover plate is disposed on the side of the encapsulation layer away from the light-emitting functional layer, and the cover plate includes a second substrate and a plurality of spaced-apart support pillars;

[0010] The support pillar is disposed in the non-light-emitting area, and there is a gap between the second substrate and the encapsulation layer.

[0011] Optionally, the light-emitting functional layer includes a pixel definition layer, which includes a first pixel sub-layer and a second pixel sub-layer. The first pixel sub-layer includes a plurality of first pixel definition portions spaced apart along a first direction, and the first pixel definition portions extend along a second direction. The second pixel sub-layer includes a plurality of second pixel definition portions spaced apart along the second direction, and the second pixel definition portions extend along the first direction.

[0012] Wherein, the projection of the first pixel definition portion on the first substrate overlaps with the projection of the second pixel definition portion on the first substrate, at least one of the support pillars is disposed in the overlapping area of ​​the first pixel definition portion and the second pixel definition portion, and the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

[0013] Optionally, the projection of the first pixel definition portion on the first substrate and the projection of the second pixel definition portion on the first substrate overlap in multiple places, and any one of the support pillars is disposed in the overlapping area of ​​the first pixel definition portion and the second pixel definition portion.

[0014] Optionally, in the first direction, the ratio of the spacing between two adjacent support columns to the maximum width of the support column is less than or equal to 30.

[0015] Optionally, the cover plate further includes a color filter layer disposed between the second substrate and the support column. The color filter layer includes color filters of different light-transmitting colors and a black matrix, and the support column is disposed corresponding to the black matrix.

[0016] Optionally, the width of the support post on the side closer to the second substrate is greater than the width of the support post on the side closer to the encapsulation layer.

[0017] Optionally, the ratio of the width of the support post on the side closer to the second substrate to the width of the support post on the side closer to the encapsulation layer is less than or equal to 2.

[0018] Optionally, the minimum width of the support post on the side closest to the encapsulation layer is greater than or equal to 3 micrometers.

[0019] Optionally, the thickness of the support column is greater than or equal to 1 micrometer.

[0020] According to a second aspect of the present invention, a display device is provided, the display device comprising a display panel as described in any of the above embodiments.

[0021] This utility model provides a display panel and a display device. The display panel includes a first substrate, a light-emitting functional layer, an encapsulation layer, and a cover plate. The light-emitting functional layer is disposed on one side of the first substrate, the encapsulation layer is disposed on the side of the light-emitting functional layer away from the first substrate, and the cover plate is disposed on the side of the encapsulation layer away from the light-emitting functional layer. The cover plate includes a second substrate and a plurality of spaced-apart support pillars, wherein the support pillars are disposed in a non-light-emitting area, and there is a gap between the second substrate and the encapsulation layer. By providing a plurality of spaced-apart support pillars in the cover plate, creating a gap between the second substrate and the encapsulation layer, the impact force is buffered and released when the cover plate is impacted, preventing the impact force from being directly transmitted to the encapsulation layer and then to the light-emitting unit. This prevents the pixel electrode from peeling off from the light-emitting layer or other problems from occurring, avoiding display failure caused by peeling off from the light-emitting layer during drop ball testing, and improving the yield of the display panel.

[0022] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] To gain a more complete understanding of this utility model and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0025] Figure 1 A schematic diagram of a comparison display device provided in an embodiment of this utility model.

[0026] Figure 2 This is a plan view of the display panel provided in an embodiment of the present utility model.

[0027] Figure 3 This is a first cross-sectional schematic diagram of the display panel provided in an embodiment of the present utility model.

[0028] Figure 4 A perspective view of the pixel definition layer, the light-emitting layer, and the support pillar provided for an embodiment of this utility model.

[0029] Figure 5 This is a schematic diagram of the cover plate provided in an embodiment of the present utility model.

[0030] Figure 6This is a schematic diagram of a ball drop test performed on a display panel according to an embodiment of the present invention.

[0031] Figure 7 This is a second cross-sectional schematic diagram of the display panel provided in an embodiment of the present utility model. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0033] To illustrate the principle behind the technical problem addressed in this embodiment of the present invention, a contrast display device is provided. It should be understood that this contrast display device cannot be considered prior art in this embodiment of the present invention. Figure 1 As shown, the comparative display device includes a heat dissipation film 11, a pressure-sensitive adhesive film 12, a foam film 13, a mesh adhesive film 14, an array film 15, a light-emitting device 16, a cover glass 17, and a polarizing film 18 arranged sequentially. A drop ball test was conducted using a 65-gram ball with a diameter of 25 millimeters, and the results are shown in the table below:

[0034] Table 1: Comparison of Drop Ball Test Tables for Display Devices

[0035]

[0036] The "Test Standard" column indicates that a 65-gram, 25-millimeter diameter ball is used for a drop test. The test pass / fail is determined by whether there are any visual or functional abnormalities on the front and back of the comparison display device. The "Item" column indicates the distance between the ball and the upper surface of the polarizer film 18 of the comparison display device; for example, "2 cm" means the ball is 2 cm away from the upper surface of the polarizer film 18. In the "Test Result" column, "NG" indicates failure due to functional or visual abnormalities, while "Pass" indicates success without abnormalities. The "Impact Energy" column indicates the impact energy of the ball. As shown in Table 1, the comparison display device failed the drop test with a ball of any height. Analysis revealed that this was due to the peeling between the anode and the light-emitting layer in the light-emitting device, leading to abnormalities in appearance and / or display. Figure 1As can be seen, due to the close contact between the layers, the impact force is transmitted from top to bottom during the drop ball test. When this force reaches the anode and the emissive layer in the light-emitting device, it causes delamination between them, leading to other problems and ultimately display failure. Therefore, existing OLED display devices suffer from a technical problem where drop ball damage during the drop ball test causes display failure.

[0037] This utility model provides a display panel and a display device to address the aforementioned technical problems.

[0038] Figure 2 This is a plan view of the display panel provided in an embodiment of the present utility model. Figure 3 This is a first cross-sectional schematic diagram of the display panel provided in an embodiment of the present utility model. Figure 4 A perspective view of the pixel definition layer, the light-emitting layer, and the support pillar provided for an embodiment of this utility model. Figure 5 This is a schematic diagram of the cover plate provided in an embodiment of the present utility model. Figure 6 This is a schematic diagram of a ball drop test performed on a display panel according to an embodiment of the present invention. Figure 7 This is a second cross-sectional schematic diagram of the display panel provided in an embodiment of the present utility model.

[0039] like Figures 2 to 7 As shown, this utility model embodiment provides a display panel 2, which includes a display area 201, the display area 201 including a light-emitting area 201a and a non-light-emitting area 201b, the display panel 2 including a first substrate 21, a light-emitting functional layer 24, an encapsulation layer 25 and a cover plate 26, the light-emitting functional layer 24 being disposed on one side of the first substrate 21, the encapsulation layer 25 being disposed on the side of the light-emitting functional layer 24 away from the first substrate 21, the cover plate 26 being disposed on the side of the encapsulation layer 25 away from the light-emitting functional layer 24, and the cover plate 26 including a second substrate 261 and a plurality of spaced support pillars 262;

[0040] The support pillar 262 is disposed within the non-light-emitting area 201b, and there is a gap between the second substrate 261 and the encapsulation layer 25.

[0041] This utility model provides a display panel that, by setting multiple spaced support pillars in the cover plate, creates a gap between the second substrate and the encapsulation layer. When the cover plate is impacted, the impact force is buffered and released through the gap between the second substrate and the encapsulation layer, preventing the impact force from being directly transmitted to the encapsulation layer and then to the light-emitting unit. This prevents the pixel electrode from peeling off from the light-emitting layer or other problems from occurring, avoiding display failure caused by peeling off from the light-emitting layer during drop ball testing, and improving the yield of the display panel.

[0042] Specifically, such as Figure 6 As shown, when the ball 28 falls onto the display panel, even if the second substrate 261 is deformed by the impact, the deformed part of the second substrate can be separated from the encapsulation layer 25 due to the presence of the gap 27. This prevents the impact force from being directly transmitted to the encapsulation layer and then sequentially to the light-emitting layer and pixel electrode layer, thus preventing display failure. The impact force is buffered and released through the gap. Even if the impact position is located at the setting position of the support pillar, the display will not fail because the support pillar corresponds to the non-light-emitting area, thereby improving the yield of the display panel.

[0043] Specifically, such as Figure 2 As shown, the display panel 2 includes a display area 201 and a non-display area 202. The non-display area 202 can be disposed on at least one side of the display area 201. For example, the non-display area 202 can be disposed around the display area 201, or for a frameless display panel, the non-display area can be disposed on the back of the display panel. A gate driving circuit and bonding terminals can be disposed in the non-display area 202.

[0044] Specifically, such as Figure 3 As shown, the display panel 2 includes a first substrate 21, a driving circuit layer 22, a light-emitting functional layer 24, an encapsulation layer 25, and a cover plate 26. The driving circuit layer 22 includes a buffer layer 221, an active layer 222, a first gate insulating layer 223, a first gate layer 224, a second gate insulating layer 225, a second gate layer 226, an interlayer insulating layer 227, a first source-drain layer 228, a passivation layer 229, a first planarization layer 231, a second source-drain layer 232, a second planarization layer 233, and a third planarization layer 234. The light-emitting functional layer 24 includes a pixel electrode layer 241, a pixel definition layer 242, a light-emitting layer 243, and a common electrode layer (not shown).

[0045] Specifically, sub-pixel units are provided within the luminescent area.

[0046] Specifically, the material of the first substrate can be either glass or polyimide.

[0047] Specifically, when the cover plate includes support pillars, there are no other film layers between the encapsulation layer and the cover plate.

[0048] Specifically, the active layer can be made of either low-temperature polycrystalline silicon or metal oxide. The active layer may include a channel portion and a doped portion.

[0049] Specifically, the material of the first gate layer includes one or more of titanium, aluminum, copper, and silver, or the material of the first gate layer can be a stack of at least two of titanium, aluminum, copper, and silver.

[0050] Specifically, the material of the second gate layer includes one or more of titanium, aluminum, copper, and silver, or the material of the second gate layer can be a stack of at least two of titanium, aluminum, copper, and silver.

[0051] Specifically, the material of the first source and drain layer includes one or more of titanium, aluminum, copper, and silver, or the material of the first source and drain layer can be a stack of at least two of titanium, aluminum, copper, and silver.

[0052] Specifically, the material of the second source / drain layer includes one or more of titanium, aluminum, copper, and silver, or the material of the second source / drain layer can be a stack of at least two of titanium, aluminum, copper, and silver.

[0053] Specifically, the pixel electrode layer may be made of one or more of indium tin oxide, silver, and magnesium, or the pixel electrode layer may be a stack of at least two of indium tin oxide, silver, and magnesium.

[0054] Specifically, the material of the second substrate includes glass.

[0055] Specifically, the cross-sectional shape of the support column can be rectangular or trapezoidal.

[0056] Specifically, the accompanying drawings in this embodiment of the present invention illustrate a display panel comprising one active layer, two gate layers, and two source-drain layers. However, the embodiments of the present invention are not limited to this. For example, the display panel may comprise only one active layer, one gate layer, and one source-drain layer. In some display panels, to further reduce thickness, the gate layer and the source-drain layer may share a single metal layer. Alternatively, the display panel may comprise two active layers, three gate layers, or two or three source-drain layers, with the two active layers made of different materials. For example, one active layer may be made of low-temperature polysilicon, and the other active layer may be made of metal oxide, thereby reducing the power consumption of the display panel and improving its performance.

[0057] Specifically, the above embodiment is illustrated by taking the cover plate including the support column as an example. That is, the support column is set on the cover plate. When forming the support column, the support column is formed on the second substrate. Then the support column is attached to the film layer structure on one side of the encapsulation layer. However, the embodiment of this utility model is not limited to this. The support column can be set on the encapsulation layer and the cover plate is attached to the support column.

[0058] Specifically, when the support post is disposed on the encapsulation layer, the width of the side of the support post closer to the encapsulation layer is greater than the width of the side of the support post farther from the encapsulation layer. The cover plate may consist only of the second substrate, or the cover plate may consist of the second substrate and a color filter layer disposed on the second substrate.

[0059] In some embodiments, the display panel further includes a support structure disposed between the pixel definition layer and the encapsulation layer. It is understood that during the fabrication of the display panel, a mask is used. To prevent the mask from directly pressing onto the film layers of the display panel and causing damage, a support structure is formed on the pixel definition layer to support the mask. However, it is understood that the density of the support structure is relatively low, and during subsequent film layer fabrication, the protrusions formed by the support structure will be flattened, failing to support the cover plate. The support pillars in this embodiment are used to support the second substrate and are not the same as the support structure.

[0060] Specifically, the density of the support columns is greater than the density of the support structure.

[0061] In some embodiments, such as Figure 3 , Figure 4 As shown, the light-emitting functional layer 24 includes a pixel definition layer 242, which includes a first pixel sub-layer 341 and a second pixel sub-layer 342. The first pixel sub-layer 341 includes a plurality of first pixel definition portions 341a spaced apart along a first direction X, and the first pixel definition portions 341a extend along a second direction Y. The second pixel sub-layer 342 includes a plurality of second pixel definition portions 342a spaced apart along the second direction Y, and the second pixel definition portions 342a extend along the first direction X.

[0062] In this configuration, the projection of the first pixel definition portion 341a onto the first substrate 21 overlaps with the projection of the second pixel definition portion 342a onto the first substrate 21. At least one support post 262 is disposed within the overlapping area of ​​the first pixel definition portion 341a and the second pixel definition portion 342a. The angle between the first direction X and the second direction Y is greater than 0 and less than or equal to 90 degrees. By disposing at least one support post within the overlapping area of ​​the first and second pixel definition portions, the support post can be positioned so as not to affect the light emission effect of the sub-pixel unit, thus avoiding a reduction in the light emission efficiency of the sub-pixel unit.

[0063] Specifically, the hydrophobicity of the second pixel sub-layer is greater than that of the first pixel sub-layer.

[0064] Specifically, by arranging multiple first pixel definition parts at intervals along a first direction and multiple second pixel definition parts at intervals along a second direction, a column of light-emitting sub-pixels of the same color can be connected together when forming a light-emitting layer by inkjet printing. This results in a faster inkjet printing rate and higher preparation efficiency. It also prevents ink droplet volume from being too large or too small due to printhead nozzle instability, avoiding uneven display and problems such as low nozzle utilization and low printing efficiency.

[0065] Specifically, the above embodiments are illustrated by taking the pixel definition layer as including a first pixel sub-layer and a second pixel sub-layer as an example. However, the embodiments of this utility model are not limited to this. Only one pixel definition layer may be set, and the pixel definition layer includes multiple arrayed pixel openings.

[0066] Specifically, some support pillars can be set in the overlapping area of ​​the second pixel definition part and the first pixel definition part, and some support pillars can be set in the area where the second pixel definition part and the first pixel definition part do not overlap.

[0067] Specifically, such as Figure 4 As shown, the light-emitting layer 243 includes a first light-emitting layer 243a, a second light-emitting layer 243b, and a third light-emitting layer 243c. The first light-emitting layer 243a, the second light-emitting layer 243b, and the third light-emitting layer 243c are respectively disposed between multiple second pixel definition portions 342a. It can be seen that the support pillar 262 is disposed at the intersection of the first pixel definition portion 341a and the second pixel definition portion 342a, thereby avoiding the support pillar from affecting the light emission effect of each sub-pixel unit.

[0068] Specifically, the light emission colors of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer can be red, green, and blue, respectively. However, the embodiments of this utility model are not limited to this. The light emission colors of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer can be red, blue, and green, or blue, green, and red, or other arrangements.

[0069] Specifically, it can be understood that the display panel includes multiple pixel units, each pixel unit includes a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit, the pixel electrode layer includes multiple pixel electrodes, the pixel electrodes, the first light-emitting layer and the common electrode layer can form the first sub-pixel unit, the pixel electrodes, the second light-emitting layer and the common electrode layer can form the second sub-pixel unit, and the pixel electrodes, the third light-emitting layer and the common electrode layer can form the third sub-pixel unit.

[0070] Specifically, the light emission colors of the first sub-pixel unit, the second sub-pixel unit, and the third sub-pixel unit can be red, blue, and green, or blue, green, and red, or other arrangements, respectively.

[0071] In some embodiments, such as Figure 4As shown, the projection of the first pixel definition portion 341a onto the first substrate 21 overlaps with the projection of the second pixel definition portion 342a onto the first substrate 21 in multiple places. Each of the support pillars 262 is disposed within the overlapping area of ​​the first pixel definition portion 341a and the second pixel definition portion 342a. By disposing of any support pillar within the overlapping area of ​​the first and second pixel definition portions, the influence of the support pillars on the light emission effect of the sub-pixel unit can be further avoided, thus preventing a reduction in the light emission efficiency of the sub-pixel unit.

[0072] Specifically, a support column is provided in each overlapping area of ​​the first pixel definition part and the second pixel definition part.

[0073] In some embodiments, the encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer. The first inorganic layer is disposed between the organic layer and the light-emitting functional layer, the organic layer is disposed between the first and second inorganic layers, and the second inorganic layer is disposed between the organic layer and the cover plate. By including the first inorganic layer, the organic layer, and the second inorganic layer in the encapsulation layer, the organic layer can fill the first inorganic layer, allowing the second inorganic layer to be relatively flat during its formation. The contact position between the second inorganic layer and the support pillar is also relatively flat, preventing slippage or other problems when the cover plate contacts the encapsulation layer. Furthermore, it prevents the second inorganic layer from directly contacting the second substrate due to unevenness. The gap between the second substrate and the encapsulation layer buffers the impact force, preventing the impact force from being directly transmitted to the encapsulation layer when the cover plate is impacted, thus preventing display panel failure.

[0074] Specifically, the material of the first inorganic layer includes one of silicon nitride and silicon oxide, the material of the second inorganic layer includes one of silicon nitride and silicon oxide, the thickness of the first inorganic layer is 1 micrometer, and the thickness of the second inorganic layer is 1 micrometer.

[0075] In some embodiments, the display panel further includes a polarizer disposed on the side of the cover plate away from the encapsulation layer.

[0076] Specifically, when the cover plate includes a color filter layer, a polarizer may not be provided, and an anti-glare film may be provided on the side of the second substrate away from the color filter layer.

[0077] In some embodiments, such as Figure 4 , Figure 5 As shown, in the first direction X, the ratio of the distance L3 between two adjacent support columns 262 to the maximum width L1 of the support column 262 is less than or equal to 30. By making the ratio of the distance between two adjacent support columns to the maximum width of the support column less than or equal to 30, the width of the support column is greater when the pixel opening is larger, that is, the area of ​​the sub-pixel unit is larger, resulting in a better buffering effect against impact.

[0078] Specifically, when the support column is set in the overlapping area of ​​the first pixel definition part and the second pixel definition part, the larger the area of ​​the sub-pixel unit, the larger the distance between the two overlapping areas of the first pixel definition part and the second pixel definition part. At this time, the width of the support column can be increased, so that the support column has a better support effect. The support column and the gap are used for buffering to prevent the display panel from failing.

[0079] In some embodiments, such as Figure 7 As shown, the cover plate 26 further includes a color filter layer 263, which is disposed between the second substrate 261 and the support pillar 262. The color filter layer 263 includes color resists 263a of different light-transmitting colors and a black matrix 263b, and the support pillar 262 is correspondingly disposed with respect to the black matrix 263b. By including a color filter layer in the cover plate, there is no need to set a polarizer, which can improve the light extraction efficiency of the display panel and reduce power consumption. Furthermore, by making the black matrix corresponding to the support pillar, a gap can be formed between the color resist and the encapsulation layer. The impact force is buffered and released through the gap and the support pillar, thereby preventing the impact force from being directly transmitted to the encapsulation layer when the cover plate is impacted, and avoiding display panel failure.

[0080] Specifically, the color filter layer can be disposed on the second substrate, and the support pillars can be disposed on the color filter layer, and the second substrate, color filter layer, and support pillars are bonded to the encapsulation layer.

[0081] Specifically, color resists can include red, green, and blue color resists.

[0082] In some embodiments, such as Figure 5 As shown, the width L2 of the support post 262 near the second substrate 261 is greater than the width L1 of the support post 262 near the encapsulation layer 25. When forming the support post on the second substrate, by etching the support post, the width of the support post near the second substrate can be made greater than the width of the support post near the encapsulation layer.

[0083] Specifically, the width of the support pillar decreases from the side of the support pillar closest to the second substrate to the side of the support pillar closest to the encapsulation layer.

[0084] In some embodiments, the ratio of the width L2 of the support post 262 on the side near the second substrate 261 to the width L1 of the support post 262 on the side near the encapsulation layer 25 is less than or equal to 2. By making the ratio of the width of the support post on the side near the second substrate to the width of the support post on the side near the encapsulation layer less than or equal to 2, problems such as poor support effect or slippage caused by the support post being too small can be avoided, thereby improving the yield of the display panel.

[0085] In some embodiments, the minimum width of the support post on the side closest to the encapsulation layer is greater than or equal to 3 micrometers. By ensuring that the minimum width of the support post on the side closest to the encapsulation layer is greater than or equal to 3 micrometers, problems such as poor support effect or slippage caused by excessively small support post width can be avoided, thereby improving the yield of the display panel.

[0086] In some embodiments, the thickness of the support pillar is greater than or equal to 1 micrometer. By making the thickness of the support pillar greater than or equal to 1 micrometer, the gap between the second substrate and the encapsulation layer can be made larger. Thus, when the cover plate is impacted, even if the cover plate deforms, it will not squeeze the area of ​​the encapsulation layer where no support pillar is provided, thereby buffering and releasing the impact force and preventing the display panel from failing.

[0087] Specifically, the thickness of the support column can be greater than or equal to 2 micrometers.

[0088] Specifically, the material of the support pillar can be the same as the material of one of the planarization layer, the first pixel sub-layer, and the second pixel sub-layer.

[0089] Specifically, the materials for the support columns include organic materials, which can be one of the following: polyacrylate resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene ether resin, polyphenylene sulfide resin, benzocyclobutene, and silica-based organic materials.

[0090] Specifically, when forming the support pillar, taking the formation of the support pillar on the second substrate as an example, an organic material can be coated on the second substrate and then baked and cured using a photopolymerization process to form the support pillar.

[0091] Meanwhile, this utility model embodiment provides a display device, which includes a display panel as described in any of the above embodiments.

[0092] Specifically, the display panel can be an organic light-emitting diode (OLED) display panel.

[0093] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0094] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0095] The embodiments, implementation methods, and related technical features of this utility model can be combined and substituted for each other without conflict.

[0096] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.

Claims

1. A display panel, characterized in that, The display panel includes a display area, which comprises a light-emitting area and a non-light-emitting area, and includes: First substrate; A light-emitting functional layer is disposed on one side of the first substrate; An encapsulation layer is disposed on the side of the light-emitting functional layer away from the first substrate; A cover plate is disposed on the side of the encapsulation layer away from the light-emitting functional layer, and the cover plate includes a second substrate and a plurality of spaced-apart support pillars; The support pillar is disposed in the non-light-emitting area, and there is a gap between the second substrate and the encapsulation layer.

2. The display panel according to claim 1, characterized in that, The light-emitting functional layer includes a pixel definition layer, which includes a first pixel sub-layer and a second pixel sub-layer. The first pixel sub-layer includes a plurality of first pixel definition portions spaced apart along a first direction, and the first pixel definition portions extend along a second direction. The second pixel sub-layer includes a plurality of second pixel definition portions spaced apart along the second direction, and the second pixel definition portions extend along the first direction. Wherein, the projection of the first pixel definition portion on the first substrate overlaps with the projection of the second pixel definition portion on the first substrate, at least one of the support pillars is disposed in the overlapping area of ​​the first pixel definition portion and the second pixel definition portion, and the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

3. The display panel according to claim 2, characterized in that, The projection of the first pixel definition portion onto the first substrate and the projection of the second pixel definition portion onto the first substrate overlap in multiple places, and any one of the support pillars is disposed in the overlapping area of ​​the first pixel definition portion and the second pixel definition portion.

4. The display panel according to claim 3, characterized in that, In the first direction, the ratio of the distance between two adjacent support columns to the maximum width of the support column is less than or equal to 30.

5. The display panel according to any one of claims 1 to 4, characterized in that, The cover plate also includes a color filter layer, which is disposed between the second substrate and the support column. The color filter layer includes color filters of different light-transmitting colors and a black matrix, and the support column is disposed corresponding to the black matrix.

6. The display panel according to any one of claims 1 to 4, characterized in that, The width of the support post on the side closer to the second substrate is greater than the width of the support post on the side closer to the encapsulation layer.

7. The display panel according to claim 6, characterized in that, The ratio of the width of the support post on the side closer to the second substrate to the width of the support post on the side closer to the encapsulation layer is less than or equal to 2.

8. The display panel according to claim 6, characterized in that, The minimum width of the support post on the side closest to the encapsulation layer is greater than or equal to 3 micrometers.

9. The display panel according to any one of claims 1 to 4, characterized in that, The thickness of the support column is greater than or equal to 1 micrometer.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

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