Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes: a display substrate; a plurality of support pillars, the plurality of support pillars being located on one side of the display substrate; a hard encapsulation cover plate, the hard encapsulation cover plate being located on the side of the support pillars away from the display substrate, and the support pillars being used to support the hard encapsulation cover plate; the area of at least part of the support pillars projected vertically on the display substrate is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillars, wherein the deformation amount of the hard encapsulation cover plate is the deformation amount of the hard encapsulation cover plate when the vertically projected areas of all the support pillars on the display substrate are the same, or is the deformation amount of the hard encapsulation cover plate when no support pillars are provided. The technical solution provided by the embodiments of the present invention can reduce the difference in the deformation amounts of different positions of the hard encapsulation cover plate by adjusting the projected areas of the support pillars at different positions based on the deformation amount of the hard encapsulation cover plate, thereby improving the flatness of the hard encapsulation cover plate and avoiding the occurrence of crushing of the support pillars and Newton rings.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technologies, and in particular, to a display panel and a display device. Background Art

[0002] Organic Light-Emitting Diode (OLED) panels have the advantages of self-luminescence, low driving voltage, high luminous efficiency, fast response speed, light weight, and high contrast, and are increasingly widely used in devices with display functions such as mobile phones and computers.

[0003] Currently, under atmospheric pressure, there is a problem of a large difference in the deformation amount between the middle area and the edge area of the display substrate and the hard encapsulation cover plate in the OLED display panel, resulting in defective phenomena such as Newton's rings and damage to the support pillars on the display panel. Summary of the Invention

[0004] Embodiments of the present invention provide a display panel and a display device to reduce the difference in the deformation amount at different positions of the hard encapsulation cover plate, improve the flatness of the hard encapsulation cover plate, and avoid the occurrence of damage to the support pillars and Newton's rings.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0006] A display substrate;

[0007] A plurality of support pillars, the plurality of support pillars being located on one side of the display substrate;

[0008] A hard encapsulation cover plate, the hard encapsulation cover plate being located on the side of the support pillars away from the display substrate, and the support pillars being used to support the hard encapsulation cover plate;

[0009] An encapsulation material layer is further provided between the hard encapsulation cover plate and the display substrate, the encapsulation material layer is disposed in the edge area of the display substrate, and the encapsulation material layer is used to fixedly encapsulate the display substrate and the hard encapsulation cover plate;

[0010] The area of the vertical projection of at least some of the support pillars on the display substrate is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillar, where the deformation amount of the hard encapsulation cover plate is the deformation amount of the hard encapsulation cover plate when the vertical projection areas of all the support pillars on the display substrate are the same, or the deformation amount of the hard encapsulation cover plate when no support pillar is provided.

[0011] Optionally, the display substrate includes a first light-emitting region and a second light-emitting region; the first light-emitting region is located in the central region of the display substrate, and the second light-emitting region is located on at least one side of the first light-emitting region; the edge region surrounds the first light-emitting region and the second light-emitting region; the area of the vertical projection of the support pillars located in the first light-emitting region on the display substrate is larger than the area of the vertical projection of the support pillars located in the second light-emitting region on the display substrate, and the area of the vertical projection of the support pillars in the first light-emitting region on the display substrate is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillars.

[0012] Optionally, in the second light-emitting region, the area of the vertical projection of each support pillar on the display substrate is equal; or in the second light-emitting region, the area of the vertical projection of the support pillars on the display substrate is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillars.

[0013] Optionally, the area of the vertical projection of the support pillars on the display substrate is determined based on the following:

[0014] S = kS1;

[0015] Wherein, S is the area of the vertical projection of the support pillar whose projection area is to be determined on the display substrate, S1 is the area of the vertical projection of the support pillar located at the central position of the display substrate on the display substrate, and k is an adjustment coefficient; k = B / A, where A and B are respectively the deformation amounts of the hard encapsulation cover plate at the position corresponding to the central position of the display substrate and at the position corresponding to the support pillar whose projection area is to be determined when the areas of the vertical projections of all the support pillars on the display substrate are the same.

[0016] Optionally, when the areas of the vertical projections of all the support pillars on the display substrate are the same, the deformation amount of the hard encapsulation cover plate satisfies the following formula:

[0017] y = ax 4 + bx 3 + cx 2 + dx + s, where y is the deformation amount, x is the position of the deformation point on the hard encapsulation cover plate, and a, b, c, d, and s are coefficients and are real numbers.

[0018] Optionally, the display substrate includes: a driving backplane and a plurality of pixel units arranged on the side of the driving backplane adjacent to the hard encapsulation cover plate, and each pixel unit includes at least three light-emitting sub-pixels of different light-emitting colors, and the area of the vertical projection of the support pillars on the driving backplane is less than half of the area of the vertical projection of the pixel units on the driving backplane.

[0019] Optionally, the heights of all the support columns are equal, and the surfaces of the support columns away from the display substrate are flush with the surfaces of the hard encapsulation cover plate away from the display substrate.

[0020] Optionally, adjacent light-emitting sub-pixels are separated by a pixel definition layer; the support columns are located on a side of the pixel definition layer away from the driving backplane.

[0021] Optionally, the shape of the vertical projection of the support column on the display substrate includes at least one of a circle, an ellipse, and a polygon.

[0022] In a second aspect, an embodiment of the present invention provides a display device, including the display panel according to any one of the first aspect.

[0023] An embodiment of the present invention provides a display panel and a display device. The display panel includes: a display substrate; a plurality of support columns located on one side of the display substrate; a hard encapsulation cover plate located on a side of the support columns away from the display substrate, and the support columns are used to support the hard encapsulation cover plate; the area of the vertical projection of at least some of the support columns on the display substrate is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support column, where the deformation amount of the hard encapsulation cover plate is the deformation amount of the hard encapsulation cover plate when the vertical projection areas of all the support columns on the display substrate are the same, or the deformation amount of the hard encapsulation cover plate when no support column is provided. In the technical solution provided by the embodiment of the present invention, the sizes of at least some of the support columns on the display substrate are adjusted based on the deformation amount of the hard encapsulation cover plate at the corresponding position of the support column. The projection area of the support column at the position where the deformation amount of the hard encapsulation cover plate is relatively large is set relatively large, and the projection area of the support column at the position where the deformation amount of the hard encapsulation cover plate is relatively small is set relatively small, which can reduce the difference in the deformation amount at different positions of the hard encapsulation cover plate, thereby improving the flatness of the hard encapsulation cover plate and avoiding the occurrence of damage to the support column and Newton's rings. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of a display panel provided in the prior art;

[0025] Figure 2 is Figure 1 a structural cross-sectional view of the structure shown along line CC1;

[0026] Figure 3 is a structural cross-sectional view of a display panel provided by an embodiment of the present invention;

[0027] Figure 4 is an arrangement diagram of support columns provided by an embodiment of the present invention;

[0028] Figure 5 is another arrangement diagram of support columns provided by an embodiment of the present invention;

[0029] Figure 6 It is a deformation curve graph of a hard encapsulation cover plate provided by an embodiment of the present invention;

[0030] Figure 7 It is an arrangement diagram of support columns provided in the prior art;

[0031] Figure 8 is Figure 7 A coordinate graph of the relationship between the deformation amount and the position of the hard encapsulation cover plate in the cross-section along the EF line;

[0032] Figure 9 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0034] As in the background art, currently, under atmospheric pressure, there is a problem of a large difference in the deformation amount between the middle region and the edge region of the hard encapsulation cover plate in the OLED display panel. Figure 1 It is a schematic structural diagram of a display panel provided in the prior art, Figure 2 is Figure 1 The structural sectional view of the shown structure along the CC1 line, referring to Figure 1 and Figure 2 , when the hard screen OLED is encapsulated, the display substrate 1 and the hard encapsulation cover plate 3 are bonded together in a vacuum state. Between the display substrate 1 and the hard encapsulation cover plate 3, the middle region is supported by the support columns 2, and the edge region is encapsulated by the glass powder material layer 4. After breaking the vacuum, the display substrate 1 and the hard encapsulation cover plate 3 are tightly bonded together under atmospheric pressure. Since the glass powder material has a high hardness and the support columns 2 have a low hardness, after the display substrate 1 and the hard encapsulation cover plate 3 are deformed under atmospheric pressure, there is a problem of a large difference in the deformation amount between the middle region and the edge region of the display substrate 1 and the hard encapsulation cover plate 3, resulting in a shape of the display panel being lower in the middle and higher on both sides. The excessive deformation amount in the middle region will cause problems such as Newton's rings and damage to the support columns 2.

[0035] In view of this, an embodiment of the present invention provides a display panel, Figure 3 It is a structural sectional view of a display panel provided by an embodiment of the present invention, Figure 4 It is an arrangement diagram of support columns provided by an embodiment of the present invention, Figure 5 It is another arrangement diagram of support columns provided by an embodiment of the present invention, referring toFigures 3 to 5 , the display panel includes:

[0036] a display substrate 10;

[0037] a plurality of support pillars 20, the plurality of support pillars 20 being located on one side of the display substrate 10;

[0038] a rigid encapsulation cover plate 30, the rigid encapsulation cover plate 30 being located on the side of the support pillars 20 away from the display substrate 10, and the support pillars 20 being used to support the rigid encapsulation cover plate 30;

[0039] an encapsulation material layer 40 is further provided between the rigid encapsulation cover plate 30 and the display substrate 10, the encapsulation material layer 40 being provided in the edge region 13 of the display substrate 10, and the encapsulation material layer 40 being used to fixedly encapsulate the display substrate 10 and the rigid encapsulation cover plate 30;

[0040] the area of the vertical projection of at least part of the support pillars 20 on the display substrate 10 is determined according to the deformation amount of the rigid encapsulation cover plate at the corresponding position of the support pillars 20, wherein the deformation amount of the rigid encapsulation cover plate is the deformation amount of the rigid encapsulation cover plate when the vertical projection areas of all the support pillars 20 on the display substrate 10 are the same, or the deformation amount of the rigid encapsulation cover plate when no support pillars 20 are provided.

[0041] Specifically, the display substrate 10 is used for light-emitting display. The display substrate 10 may include a driving backplane and a plurality of pixel units arranged on one side of the driving backplane. The plurality of support pillars 20 are distributed in the light-emitting area of the display substrate 10. During the preparation process of the display substrate 10, the support pillars 20 can play a role in supporting the evaporation mask to prevent the evaporation mask from scratching the display substrate 10. After the evaporation is completed, a rigid encapsulation cover plate 30 is provided on the side of the support pillars 20 away from the display substrate 10 to realize the encapsulation of the display substrate 10. The rigid encapsulation cover plate 30 is used to encapsulate and protect the pixel units and other structures on the display substrate 10, so as to isolate water and oxygen and prevent water and oxygen from damaging the internal structure of the display panel. The rigid encapsulation cover plate 30 is also used to prevent the display substrate 10 from being scratched and worn by external forces. Among them, the rigid encapsulation cover plate 30 may be a glass cover plate, and the material of the support pillars 20 includes organic substances such as polyimide.

[0042] During the encapsulation process of the display panel, a glass encapsulation material can be set at the edge between the hard encapsulation cover plate 30 and the display substrate 10. By melting and solidifying the glass encapsulation material, the fixation and encapsulation of the display substrate 10 and the hard encapsulation cover plate 30 are realized. After the glass encapsulation material is solidified, an encapsulation material layer 40 is formed. That is to say, in the display panel, a glass encapsulation material layer can also be provided between the hard encapsulation cover plate 30 and the display substrate 10. The glass encapsulation material layer is disposed in the edge region 13 of the display substrate 10, and the glass encapsulation material layer is used to fixedly encapsulate the display substrate 10 and the hard encapsulation cover plate 30. Between the display substrate 10 and the hard encapsulation cover plate 30, the middle region is supported by the support columns 20, and the periphery of the edge is supported by the glass encapsulation material layer.

[0043] Since the hardness of the encapsulation material layer 40 is greater than that of the support columns 20, the supportability of the encapsulation material layer 40 is greater than that of the support columns 20. Under the action of atmospheric pressure, since the support columns 20 located in the central region are far from the encapsulation material layer 40 in the edge region 13 of the display substrate 10, the support columns 20 located in the central region bear a greater pressure of the display substrate 10 and the hard encapsulation cover plate 30. While the support columns 20 near the edge region 13 are supported by the encapsulation material layer 40, the support columns 20 bear a smaller pressure of the display substrate 10 and the hard encapsulation cover plate 30. If all the support columns 20 have the same size, the deformation of the support columns 20 near the central region of the display substrate 10 is relatively large, that is, the deformation amount of the corresponding hard encapsulation cover plate is also relatively large; the deformation of the support columns 20 near the edge region 13 of the display substrate 10 is relatively small, that is, the deformation amount of the corresponding hard encapsulation cover plate 30 is also relatively small. In addition, when the support columns 20 are not provided, since the hard encapsulation cover plate 30 in the edge region 13 can be supported by the encapsulation material layer 40, under the action of atmospheric pressure, the deformation amount of the hard encapsulation cover plate near the central region of the display substrate 10 is relatively large; the deformation amount of the hard encapsulation cover plate 30 near the edge region 13 of the display substrate 10 is relatively small.

[0044] That is, when all support pillars 20 are of the same size, or when there are no support pillars 20, the deformation of the hard encapsulation cover plate 30 at different locations is different. The deformation of the hard encapsulation cover plate 30 near the center area of the display substrate 10 is relatively large, while the deformation of the hard encapsulation cover plate 30 near the edge area 13 of the display substrate 10 is relatively small. By adjusting the area of the vertical projection of at least a portion of the support pillars 20 on the display substrate 10 (hereinafter referred to as the projected area) based on the deformation of the hard encapsulation cover plate 30 at the corresponding positions of the support pillars 20, the projected area of the support pillars 20 at the positions with the larger deformation of the hard encapsulation cover plate 30 is set to be relatively large, and the projected area of the support pillars 20 at the positions with the smaller deformation of the hard encapsulation cover plate 30 is set to be relatively large. This can reduce the difference in deformation of the hard encapsulation cover plate 30 at different locations, thereby improving the flatness of the hard encapsulation cover plate 30 and avoiding damage to the support pillars and the appearance of Newton rings.

[0045] In the display panel provided by an embodiment of the present invention, the vertical projection area of at least some of the support pillars on the display substrate is determined based on the deformation of the hard package cover plate at the corresponding positions of the support pillars. The deformation of the hard package cover plate is the deformation of the hard package cover plate when all the support pillars have the same vertical projection area on the display substrate, or the deformation of the hard package cover plate when no support pillars are provided. By setting the projected area of the support pillars at positions with larger deformation of the hard package cover plate to be relatively larger, and setting the projected area of the support pillars at positions with smaller deformation of the hard package cover plate to be relatively smaller, the difference in deformation at different positions of the hard package cover plate can be reduced, thereby improving the flatness of the hard package cover plate and avoiding damage to the support pillars and the appearance of Newton's rings.

[0046] Optional, reference Figure 4 and Figure 5 The display substrate 10 includes a first light-emitting area 11 and a second light-emitting area 12; the first light-emitting area 11 is located in the central area of the display substrate 10, and the second light-emitting area 12 is located on at least one side of the first light-emitting area 11; the edge area 13 surrounds the first light-emitting area 11 and the second light-emitting area; the area of the vertical projection of the support column 20 located in the first light-emitting area 11 on the display substrate 10 is larger than the area of the vertical projection of the support column 20 located in the second light-emitting area 12 on the display substrate 10, and the area of the vertical projection of the support column 20 in the first light-emitting area 11 on the display substrate 10 is determined according to the deformation of the hard packaging cover plate 30 at the corresponding position of the support column 20.

[0047] Specifically, Figure 4 and Figure 5Exemplarily, the second light-emitting region 12 is drawn to surround the first light-emitting region 11, that is, the second light-emitting region 12 is provided on each side of the first light-emitting region 11. Relative to the first light-emitting region 11, the second light-emitting region 12 is closer to the edge region 13 where the encapsulation material layer 40 is provided. The area of the vertical projection of the support pillar 20 located in the first light-emitting region 11 on the display substrate 10 is larger than the area of the vertical projection of the support pillar 20 located in the second light-emitting region 12 on the display substrate 10. It can be understood that the projection area of the support pillar 20 in the first light-emitting region 11, which is under a greater pressure from the hard encapsulation cover plate 30, is set relatively large, and the projection area of the support pillar 20 in the second light-emitting region 12, which is under a smaller pressure from the hard encapsulation cover plate 30, is set relatively small. To reduce the difference in the deformation amounts of the encapsulation material layer 40 in the first light-emitting region and the encapsulation material layer 40 in the second light-emitting region. Among them, at least the area of the vertical projection of the support pillar 20 in the first light-emitting region 11 on the display substrate 10 is determined according to the deformation amount of the hard encapsulation cover plate 30 at the corresponding position of the support pillar 20. Relative to the second light-emitting region 12, the first light-emitting region 11 is farther away from the edge region 13 where the encapsulation material layer 40 is provided. Therefore, the difference in the deformation amount of the hard encapsulation cover plate 30 in the first light-emitting region 11 is relatively large. By adjusting the projection area of the support pillar 20 in the first light-emitting region 11 based on the deformation amount of the hard encapsulation cover plate 30 at the corresponding position, the precise adjustment of the support strength of the support pillars 20 at different positions in the first light-emitting region 11 is realized, thereby further improving the flatness of the hard encapsulation cover plate 30 and avoiding the pressing damage of the support pillars 20 and the appearance of Newton's rings.

[0048] Optionally, referring to Figures 3 to 5 , in the second light-emitting region 12, the area of the vertical projection of each support pillar 20 on the display substrate 10 is equal (such as Figure 4 ); or in the second light-emitting region 12, the area of the vertical projection of the support pillar 20 on the display substrate 10 is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillar 20 (such as Figure 5 ).

[0049] Specifically, similar to the setting method of the first light-emitting region 11, in the second light-emitting region 12, the area of the vertical projection of the support pillar 20 on the display substrate 10 is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillar 20. The precise adjustment of the support strength of the support pillars 20 at different positions in the second light-emitting region 12 is realized, thereby further improving the flatness of the hard encapsulation cover plate 30.

[0050] In the second light-emitting region 12, it is also possible to set the areas of the vertical projections of each support pillar 20 on the display substrate 10 to be equal. Since the second light-emitting region 12 is closer to the edge region 13 where the encapsulation material layer 40 is provided, under the support of the encapsulation material layer 40, the deformation amount of the hard encapsulation cover plate above the second light-emitting region 12 is smaller, and the pressure on the support pillar 20 from the hard encapsulation cover plate is smaller. Therefore, setting the areas of the vertical projections of each support pillar 20 in the second light-emitting region 12 on the display substrate 10 to be equal has a smaller impact on the flatness of the hard encapsulation cover plate 30. Based on this, setting the areas of the vertical projections of each support pillar 20 in the second light-emitting region 12 on the display substrate 10 to be equal does not require adjustment of the projected area of the support pillars 20 in the second light-emitting region 12, and can reduce the design difficulty of the size of the support pillars 20.

[0051] Optionally, referring to Figures 3 to 5 , in the first light-emitting region 11, along the direction from the center of the first light-emitting region 11 to the edge of the first light-emitting region 11, the area of the vertical projection of the support pillar 20 on the display substrate 10 gradually decreases.

[0052] Specifically, the center of the first light-emitting region 11 can be understood as the position where the deformation amount of the hard encapsulation cover plate 30 is the largest under the action of the external atmospheric pressure when the areas of the vertical projections of each support pillar 20 are equal, that is, the position where the support pillar 20 bears the largest pressure from the hard encapsulation cover plate 30, and also the position where the support pillar 20 has the largest deformation amount. The position where the hard encapsulation cover plate 30 has the largest deformation amount under the action of the external atmospheric pressure is usually the geometric center position of the first light-emitting region 11. The farther the position is from the center of the first light-emitting region 11, the smaller the pressure on the support pillar 20 from the hard encapsulation cover plate 30. Therefore, along the direction from the center of the first light-emitting region 11 to the edge of the first light-emitting region 11, setting the area of the vertical projection of the support pillar 20 on the display substrate 10 to gradually decrease can realize the adjustment of the projected area of the support pillar 20 at each point in the first light-emitting region 11. While further improving the flatness of the hard encapsulation cover plate, it can also reduce the area ratio of the support pillar 20 in the first light-emitting region 11, reduce the influence of the support pillar 20 on the light emission of the first light-emitting region 11, and ensure the light-emitting effect of the display panel. In addition, multiple support pillars 20 can be arranged in an array throughout the first light-emitting region 11, so that the hard encapsulation cover plate 30 above the first light-emitting region 11 can receive a uniformly distributed upward supporting force, and can further improve the flatness of the hard encapsulation cover plate 30 above the first light-emitting region 11.

[0053] Optionally, the area of the vertical projection of the support pillar 20 on the display substrate 10 is determined based on the following:

[0054] S = kS1;

[0055] Among them, S is the vertical projection area of the support pillar 20 with the projected area to be determined on the display substrate 10, S1 is the area of the vertical projection of the support pillar 20 located at the center position of the display substrate 10 on the display substrate 10, and k is an adjustment coefficient; k = B / A, where A and B are respectively the deformation amounts of the hard encapsulation cover plate at the position corresponding to the center position of the display substrate 10 and the position corresponding to the support pillar 20 with the projected area to be determined when the vertical projection areas of all the support pillars on the display substrate 10 are the same.

[0056] Specifically, when determining the vertical projection areas of different support pillars 20 on the display substrate 10, mechanical simulation modeling can be performed first according to design information such as the screen size, the width and position of the encapsulation material layer 40, etc., to calculate the deformation amount of the display substrate 10 or the hard encapsulation cover plate 30 after being pressed by the atmospheric pressure, so as to obtain the deformation curve. Figure 6 It is a deformation curve diagram of a hard encapsulation cover plate provided by an embodiment of the present invention. Refer to Figure 6 , combined with Figure 1 and Figure 3 ( Figure 3 It is a cross-sectional view of the display panel along the CC1 line provided by an embodiment of the present invention), the direction of the coordinate axis Z is perpendicular to the display panel, the coordinate axes X and Y are perpendicular to each other, and the plane formed by the coordinate axes X and Y is the plane where the display substrate 10 is located. Curve a is the deformation curve of the hard encapsulation cover plate.

[0057] The coordinate axis Z can be understood as the distance between the glass encapsulation cover plate 30 and the display substrate 10. The deformation amount of the hard encapsulation cover plate 30 at different positions after being pressed by the atmospheric pressure is the deformation amount of the corresponding support pillar 20 at that position. Under the condition that each support pillar has the same projected area, h1 is the height of the support pillar 20 deformed at the center position O of the display substrate 10, and h2 is the height of the support pillar 20 with the projected area to be determined corresponding to the position P after deformation. The deformation amount of the support pillar 20 at the center position O is greater than the deformation amount of the support pillar 20 at the position P.

[0058] Taking the lowest point (O) at the center of the hard encapsulation cover plate 30 in the display panel as the reference point, calculate the adjustment coefficients of the support pillars 20 at different positions, and adjust the projected areas of the support pillars 20 at different positions through the adjustment coefficients. To determine Figure 1Taking the projected area of the support pillar 20 at the middle position P as an example, according to the deformation curve, the deformation amount of the center point of the hard encapsulation cover plate 30 in the display panel is obtained as A, and the deformation amount of the point position at position P is obtained as B. If the adjustment is made based on the area of the support pillar 20 at the center position of the display substrate 10, the adjustment coefficient k of the red point is B / A. Then, when designing, the area of the support pillar 20 at position P is set to the area of the support pillar 20 at the center position of the display substrate 10 multiplied by the proportionality coefficient B / A. In another embodiment of the present invention, the adjustment can also be made based on the area of the support pillar 20 farthest from the center position of the display substrate 10. Then, the adjustment coefficient is the ratio of the deformation amount of the hard encapsulation cover plate 30 at the position corresponding to the support pillar 20 with the projected area to be determined to the deformation amount of the hard encapsulation cover plate 30 at the position corresponding to the support pillar 20 farthest from the center position of the display substrate 10.

[0059] Optionally, Figure 7 is an arrangement diagram of support pillars provided in the prior art; when the vertical projected areas of all support pillars on the display substrate are the same, the deformation amount of the hard encapsulation cover plate satisfies the following formula:

[0060] y = ax 4 + bx 3 + cx 2 + dx + s, where y is the deformation amount, x is the position of the deformation point on the hard encapsulation cover plate, and a, b, c, d, and s are coefficients and are real numbers.

[0061] Exemplarily, Figure 8 is Figure 7 a coordinate diagram of the relationship between the deformation amount and the position of the hard encapsulation cover plate in the cross-section along the EF line. Referring to Figure 8 and Figure 7 , a sampling line is taken from the left side (point E) of the middle position of the display substrate 10 to the center (point F) of the display substrate 10, and the curve of the deformation amount of the hard encapsulation cover plate with respect to the position is obtained. By using a polynomial, the approximate fitting formula can be:

[0062] y = -9.61E -17 x 4 + 3.24E -12 x 3 - 2.66E -8 x 2 + 3.85E -5 x + 1.96E -5Among them, curve L1 is a curve obtained by sequentially connecting simulation data points, and curve L2 is a curve corresponding to a formula formed by fitting the simulation data points. When determining the vertical projection area of each support pillar on the display substrate, the deformation amount of the rigid encapsulation cover plate at the corresponding position of each support pillar can be calculated first according to the deformation amount formula of the rigid encapsulation cover plate, and the vertical projection area of the support pillar on the display substrate can be determined according to the deformation amount.

[0063] Optionally, referring to Figures 3 to 5 , the heights of all the support pillars 20 are equal, and the surface of the support pillar 20 away from the display substrate 10 is flush with the surface of the rigid encapsulation cover plate 30 away from the display substrate 10. Thereby, it can be ensured that the deformation amount of the rigid encapsulation cover plate is equal to the deformation amount of the support pillar 20, and further improve the accuracy of adjusting the size of the support pillar 20 according to the deformation amount of the rigid encapsulation cover plate.

[0064] Optionally, the display substrate 10 includes:

[0065] A driving backplane and a plurality of pixel units arranged on one side of the driving backplane adjacent to the rigid encapsulation cover plate 30. Each pixel unit includes at least three different light-emitting sub-pixels of different light-emitting colors. The area of the vertical projection of the support pillar 20 on the driving backplane is less than half of the area of the vertical projection of the pixel unit on the driving backplane.

[0066] Exemplarily, each pixel unit includes three different light-emitting sub-pixels of different light-emitting colors, namely a red light-emitting sub-pixel, a green light-emitting sub-pixel, and a blue light-emitting sub-pixel. Setting the area of the vertical projection of the support pillar 20 on the driving backplane to be less than half of the area of the vertical projection of the pixel unit on the driving backplane can prevent the area of the support pillar 20 from being too large and affecting the number of pixel units per unit area of the display panel, thereby ensuring that the display panel has a high pixel density.

[0067] Optionally, adjacent light-emitting sub-pixels are separated by a pixel definition layer; the support pillar 20 is located on the side of the pixel definition layer away from the driving backplane. Since the material of the pixel definition layer can be the same as the material of the support pillar 20, for example, both are polyimide, setting the support pillar 20 on the side of the pixel definition layer away from the driving backplane can enable the pixel definition layer and the support pillar 20 to be prepared and formed in the same process, and only need to etch the support pillar and the pixel definition layer based on different masks, thereby simplifying the manufacturing process of the display panel.

[0068] Optionally, the shape of the vertical projection of the support pillar 20 on the display substrate 10 includes at least one of a circle, an ellipse, and a polygon. The shape of the vertical projection of each support pillar 20 on the display substrate 10 can be the same or partially the same. Exemplarily, the shape of the vertical projection of each support pillar 20 on the display substrate 10 is set to be the same, which is convenient for adjusting the size of the support pillar 20 and reduces the process difficulty.

[0069] An embodiment of the present invention further provides a display device. Figure 9 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Refer to Figure 9 , the display device includes the display panel 100 described in any of the above embodiments. It has the same technical effects and will not be elaborated here.

[0070] Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, Comprising: A display substrate; A plurality of support pillars, and a plurality of the support pillars are located on one side of the display substrate; A hard encapsulation cover plate, the hard encapsulation cover plate is located on the side of the support pillars away from the display substrate, and the support pillars are used to support the hard encapsulation cover plate; An encapsulation material layer is further provided between the hard encapsulation cover plate and the display substrate, the encapsulation material layer is disposed in the edge region of the display substrate, and the encapsulation material layer is used to fixedly encapsulate the display substrate and the hard encapsulation cover plate; The area of the vertical projection of at least a part of the support pillars on the display substrate is preset and determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillars, wherein the deformation amount of the hard encapsulation cover plate is the deformation amount of the hard encapsulation cover plate when the vertical projection areas of all the support pillars on the display substrate are the same, or the deformation amount of the hard encapsulation cover plate when no support pillars are provided; The area of the vertical projection of the support pillars on the display substrate is determined based on the following: ； Wherein, S is the vertical projection area of the support column whose projection area is to be determined on the display substrate, is the vertical projection area of the support column located at the center position of the display substrate on the display substrate, and k is an adjustment coefficient; k = B / A, where A and B are respectively the deformation amounts of the hard encapsulation cover plate at the position corresponding to the center position of the display substrate and the position corresponding to the support column whose projection area is to be determined when the vertical projection areas of all the support columns on the display substrate are the same.

2. The display panel according to claim 1, wherein: The display substrate includes a first light-emitting region and a second light-emitting region; the first light-emitting region is located in the central region of the display substrate, and the second light-emitting region is located on at least one side of the first light-emitting region; the edge region surrounds the first light-emitting region and the second light-emitting region; the area of the vertical projection of the support pillars located in the first light-emitting region on the display substrate is greater than the area of the vertical projection of the support pillars located in the second light-emitting region on the display substrate, and the area of the vertical projection of the support pillars in the first light-emitting region on the display substrate is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillars.

3. The display panel according to claim 2, wherein In the second light-emitting region, the area of the vertical projection of each of the support pillars on the display substrate is equal; or in the second light-emitting region, the area of the vertical projection of the support pillars on the display substrate is determined according to the deformation amount of the hard encapsulation cover plate at the corresponding position of the support pillars.

4. The display panel according to claim 1, wherein When the vertical projection areas of all the support pillars on the display substrate are the same, the deformation amount of the hard encapsulation cover plate satisfies the following formula: , where y is the amount of deformation, x is the position of the deformation point on the hard encapsulation cover plate, a, b, c, d, and s are coefficients and are real numbers.

5. The display panel according to claim 1, characterized in that, The heights of all the support pillars are equal, and the surface of the support pillars away from the display substrate is flush with the surface of the hard encapsulation cover plate away from the display substrate.

6. The display panel according to claim 1, wherein The display substrate includes: A driving backplane and a plurality of pixel units arranged on the side of the driving backplane adjacent to the hard encapsulation cover plate, and each pixel unit includes at least three different light-emitting color sub-pixels, and the area of the vertical projection of the support pillars on the driving backplane is less than half of the area of the vertical projection of the pixel units on the driving backplane.

7. The display panel according to claim 6, wherein, Adjacent sub-pixels are separated by a pixel definition layer; the support pillars are located on the side of the pixel definition layer away from the driving backplane.

8. The display panel according to claim 1, wherein The shape of the vertical projection of the support pillars on the display substrate includes at least one of a circle, an ellipse, and a polygon.

9. A display device, characterized in that, Comprising the display panel according to any one of claims 1-8.

Images