Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and aims to solve the problem of non-uniform display of edge positions due to different solvent evaporation rates of light-emitting materials at all positions of a display panel in the related technology. The display panel comprises a substrate, a pixel definition layer arranged on the substrate, and a plurality of interval parts which are arranged at intervals. The pixel definition layer comprises a main body part and an extension part, a plurality of first openings located in the display area are defined in the main body part, and at least one second opening located in the non-display area is defined in the extension part; the spacing part is arranged in the second opening; wherein the arrangement density of the spacing parts in the first area is smaller than that of the spacing parts in the second area.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] OLED (Organic Light-Emitting Diode) has attracted more and more attention due to its advantages such as self-luminescence, high efficiency, and bright colors.

[0003] During the formation of the light-emitting layer of an OLED display panel, a solution with a light-emitting material is usually first printed into the openings of the pixel definition layer, and then the solvent in the solution is rapidly volatilized in a vacuum environment through a VCD (Vacuum Chamber Dryer) process to form the light-emitting layer.

[0004] However, in the VCD process, the solvent evaporation rate is non-uniform at the center and edge positions of the display area of the display panel, and the closer to the center position of the display area, the smaller the solvent evaporation rate (or evaporation amount), resulting in problems such as different film thicknesses and different film-forming shapes of the light-emitting materials at the edge position and the center position of the display area. Furthermore, after the display panel is lit, problems such as uneven display (i.e., mura phenomenon) occur at the edge position of the display panel. Summary of the Invention

[0005] Embodiments of the present application provide a display panel and a display device to solve the problem of uneven display at the edge position of the display panel in the related art due to different solvent evaporation rates of the light-emitting materials at different positions.

[0006] On the one hand, embodiments of the present application provide a display panel having a display area and a non-display area. The non-display area includes a first area and a second area arranged in sequence along a direction away from the display area. The display panel includes:

[0007] A substrate;

[0008] A pixel definition layer disposed on the substrate. The pixel definition layer includes a main body portion and an extension portion. The main body portion defines a plurality of first openings located in the display area, and the extension portion defines at least one second opening located in the non-display area; and

[0009] A plurality of spaced-apart spacer portions disposed in the second opening; wherein, the arrangement density of the spacer portions located in the first area is less than the arrangement density of the spacer portions located in the second area.

[0010] In some embodiments, along the direction in which the second region deviates from the first region, a plurality of the spacer portions are arranged in sequence, and the distance between adjacent spacer portions gradually decreases.

[0011] In some embodiments, the second region deviates from the first region along a first direction, and the extending portion includes a first sidewall and a second sidewall sequentially arranged along the first direction; a plurality of the spacer portions include a first spacer portion close to the first sidewall and a second spacer portion close to the second sidewall, the first spacer portion and the first sidewall have a first distance, and the second spacer portion and the second sidewall have a second distance; wherein, the first distance, the distance between adjacent spacer portions among the plurality of spacer portions, and the second distance gradually decrease.

[0012] In some embodiments, the second region deviates from the first region along a first direction, and each of the spacer portions extends along a second direction and is connected to the extending portion, and the second direction intersects the first direction.

[0013] In some embodiments, a capillary liquid absorption layer is provided on the surface of the spacer portion, and the capillary liquid absorption layer covers the top surface and at least part of the side surface of the spacer portion.

[0014] In some embodiments, the second region deviates from the first region along a first direction, and a plurality of the spacer portions are arranged in sequence along the first direction; each of the spacer portions includes a plurality of spacer blocks arranged along a second direction, and the second direction intersects the first direction; wherein, along the first direction, the number of the spacer blocks in each of the spacer portions gradually increases.

[0015] In some embodiments, the plurality of spacer blocks in each of the spacer portions are arranged at equal intervals; wherein, along the first direction, the distance between adjacent spacer blocks in each of the spacer portions gradually decreases.

[0016] In some embodiments, along the first direction, the distance between adjacent spacer portions gradually decreases.

[0017] In some embodiments, a capillary liquid absorption layer is provided on the surface of the spacer block, and the capillary liquid absorption layer covers the top surface and at least part of the side surface of the spacer portion.

[0018] In some embodiments, the extending portion includes a base and a sidewall, and along the thickness direction of the display panel, the size of the spacer portion is greater than or equal to 1 / 3 of the size of the sidewall and less than or equal to 4 / 3 of the size of the sidewall.

[0019] In some embodiments, the extension part is defined with a plurality of the second openings; each of the second openings is arranged side by side with a corresponding one of the plurality of first openings in a third direction, and in a fourth direction perpendicular to the third direction, the size of the second opening is equal to that of the corresponding first opening.

[0020] On the other hand, an embodiment of the present application further provides a display device, which includes the display panel as described in any of the above embodiments.

[0021] For the display panel provided by the embodiment of the present application, due to the provision of the second openings, the distance between the first openings in the display area and the edge of the display panel can be increased, which is beneficial to improving the uniformity of the solvent solubility in the VCD atmosphere at the corresponding display area position, and further ensuring the uniformity of the film thickness of the light-emitting layer in the display area to alleviate the problem of uneven display at the edge position of the display panel. In addition, a spacer is provided in the second opening, and the presence of the spacer will increase the contact area between the solution in the second opening and the vacuum, thereby increasing the evaporation rate of the solvent in the second opening to make up for the problem of the decrease in the solvent concentration in the VCD atmosphere caused by the suction effect due to the second opening being close to the edge of the display panel. Moreover, by controlling the arrangement density of the spacers in the first area to be less than that in the second area, the evaporation rate of the solvent in the second area can be made greater than that in the first area, so that the solvent concentration in the VCD atmosphere corresponding to the second area can be made up, and further the solvent solubility in the VCD atmosphere corresponding to the non-display area has better uniformity. In this way, the difference in the solvent solubility in the VCD atmosphere corresponding to the display area can be compensated to a certain extent, so as to ensure the consistency of the evaporation rate of the solvent in the display area, and further improve the film thickness uniformity of the light-emitting layer in the display area to improve the display effect of the display panel. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0023] Figure 1 is a schematic structural diagram of a display panel provided by some embodiments of the present application;

[0024] Figure 2 is Figure 1 an enlarged structural diagram of area E in

[0025] Figure 3 is Figure 2 a cross-sectional structural diagram along B-B';

[0026] Figure 4 is Figure 2 a schematic structural view of a spacer portion located within a second opening in

[0027] Figure 5 a schematic structural view of a spacer portion having a capillary liquid absorption layer on its surface according to some embodiments of the present application;

[0028] Figure 6 is Figure 2 another schematic structural view of a spacer portion located within a second opening in

[0029] Figure 7 is Figure 1 another enlarged structural view of region E in

[0030] Figure 8 is Figure 1 yet another enlarged structural view of region E in

[0031] Figure 9 a change curve graph showing the uniformity of the VCD atmosphere at different positions of a display panel;

[0032] Figure 10 a schematic structural view of a display device provided by some embodiments of the present application. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the idea of the present application, and should not be regarded as a limitation on the protection scope of the present application.

[0034] In the description of the present application, it should be understood that terms such as "first", "second" and similar words do not denote any order, quantity or importance, but are only used to distinguish different technical features. Terms such as "a plurality of" and similar words mean two or more, unless otherwise clearly defined.

[0035] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0036] In the present application, the term "example" is used to mean "serving as an example, illustration or explanation". Any embodiment described as an "example" in the present application is not necessarily construed as being more preferred or having more advantages than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application.

[0037] The various embodiments of the present application are similar, and the features in different embodiments and / or different examples can be combined with each other.

[0038] In the related art, in the VCD process of the light-emitting layer of a display panel, affected by the difference in the vacuum evaporation atmosphere (i.e., the vacuum evaporation environment), the evaporation rate of the solution with the light-emitting material is different at different positions in the display area. For example, for the edge position of the display area, the solvent in the solution is easily sucked after volatilization, resulting in a smaller solvent concentration in the atmosphere at the edge position of the display area, and further causing a larger evaporation rate (or evaporation amount) of the solvent at the edge position of the display area; while for the center position of the display area, the solvent in the solution is easily aggregated after volatilization, resulting in a larger solvent concentration in the atmosphere at the center position of the display area, and further causing a smaller evaporation rate of the solvent at the center position of the display area. This leads to problems such as different film thicknesses and different film-forming shapes of the light-emitting materials at the edge position and the center position of the display area. Furthermore, after the display panel is lit, problems such as uneven display (i.e., mura phenomenon) appear at the edge position of the display panel.

[0039] Based on this, some embodiments of the present application provide a display panel. As Figure 1 shown, the display panel 100 has a display area AA and a non-display area NA. The non-display area NA is located on at least one side of the display area AA. For example, the non-display area NA is located on one side or multiple sides of the display area AA. As an example, the non-display area NA can surround the display area AA.

[0040] As Figures 2 to 4 shown, Figure 2 shows Figure 1 the enlarged structure of the region E in Figure 3 shows Figure 2 the cross-sectional structure along the B-B' direction, Figure 4 shows Figure 2 a structure of the spacer 31 in the second opening K2 in

[0041] During the manufacturing process of the light-emitting layer of the display panel 100, first, a solution with a light-emitting material is printed into the first opening K1 in the display area AA and the second opening K2 in the non-display area NA. Then, the solvent in the solution is evaporated through the VCD process to form the light-emitting layer. Since the second opening K2 is provided and the virtual pixels in the second opening K2 do not participate in the display of the display panel 100, the distance between the first opening K1 in the display area AA and the edge of the display panel 100 is increased, which is beneficial to improving the uniformity of the solvent concentration in the VCD atmosphere at the position of the corresponding display area AA. Furthermore, the thickness uniformity of the light-emitting layer in the display area AA is ensured to alleviate the problem of uneven display at the edge position of the display panel. In addition, in the embodiments of the present application, a spacer 31 is provided in the second opening K2. The presence of the spacer 31 increases the contact area between the solution in the second opening K2 and the vacuum, thereby increasing the evaporation rate of the solvent in the second opening K2 to compensate for the problem of the decrease in the solvent concentration in the VCD atmosphere caused by the suction effect due to the second opening K2 being close to the edge of the display panel. That is to say, by increasing the evaporation rate of the solvent in the second opening K2, the solvent concentration in the VCD atmosphere at the position of the second opening K2 is compensated, which is beneficial to improving the uniformity of the solvent concentration in the VCD atmosphere at each position of the display panel, and further improving the thickness uniformity of the light-emitting layer to further alleviate the problem of uneven display at the edge position of the display panel.

[0042] In some embodiments, as Figures 2 to 4 shown, the arrangement density of the spacers 31 in the first region A1 is less than the arrangement density of the spacers 31 in the second region A2. Herein, the arrangement density of the spacers 31 refers to the number of spacers 31 per unit area. Since the arrangement density of the spacers 31 in the first region A1 is less than the arrangement density of the spacers 31 in the second region A2, when the areas of the first region A1 and the second region A2 are equal, the number of spacers 31 in the first region A1 is more than the number of spacers 31 in the second region A2.

[0043] Since the second region A2 is farther from the display region AA than the first region A1, the solvent concentration in the VCD atmosphere corresponding to the second region A2 is smaller than that in the first region A1. In the embodiment of the present application, by controlling the arrangement density of the spacer portions 31 in the first region A1 to be smaller than the arrangement density of the spacer portions 31 in the second region A2, the evaporation rate of the solvent in the second region A2 can be made larger than the evaporation rate of the solvent in the first region A1, so that the solvent concentration in the VCD atmosphere corresponding to the second region A2 can be compensated, and then the solvent concentration in the VCD atmosphere corresponding to the non-display region NA has better uniformity. In this way, the difference in the solvent concentration in the VCD atmosphere corresponding to the display region AA can be compensated to a certain extent, so as to ensure the consistency of the evaporation rate of the solvent in the display region AA, and then improve the film thickness uniformity of the light-emitting layer in the display region AA, so as to improve the display effect of the display panel 100. In addition, the setting of the spacer portion 31 is also beneficial to reducing the size of the second opening K2 in the direction in which the second region A2 faces away from the first region A1, so that the width of the non-display region NA can be reduced, which is beneficial to the narrow border design of the display panel 100.

[0044] In some embodiments, please continue to refer to FIGS. 2 to Figure 4 , along the direction in which the second region A2 faces away from the first region A1 (hereinafter referred to as the first direction X), a plurality of spacer portions 31 are arranged in sequence, and the distance between adjacent spacer portions 31 gradually decreases.

[0045] By setting the distances between the spacer portions 31 to gradually decrease, the arrangement density of the spacer portions 31 can be made to gradually decrease along the first direction X, so that the solvent concentration in the VCD atmosphere at the position of the spacer portions 31 in the second opening K2 can be effectively compensated, and the uniformity of the solvent concentration in the VCD atmosphere at the position of the spacer portions 31 in the second opening K2 is better, and then the consistency of the evaporation rate of the solvent in the display region AA is ensured, so as to improve the film thickness uniformity of the light-emitting layer in the display region AA.

[0046] As an example, Figure 3 and Figure 4 show six spacer portions 31 arranged along the first direction X. The six spacer portions 31 have a third distance D3, a fourth distance D4, a fifth distance D5, a sixth distance D6, and a seventh distance D7 in sequence along the first direction X, and the third distance D3, the fourth distance D4, the fifth distance D5, the sixth distance D6, and the seventh distance D7 gradually decrease in sequence.

[0047] In some embodiments, the extension portion 22 has a first side wall 222 and a second side wall 223 arranged in sequence along the first direction X. The plurality of spacer portions 31 include a first spacer portion close to the first side wall 222 and a second spacer portion close to the second side wall 223. The first spacer portion and the first side wall 222 have a first spacing D1, and the second spacer portion and the second side wall 223 have a second spacing D2; wherein, the first spacing D1, the spacing between adjacent spacer portions in the plurality of spacer portions (i.e., the third spacing D3 to the seventh spacing D7), and the second spacing D2 gradually decrease. That is to say, the first spacing D1 > the third spacing D3 > the fourth spacing D4 > the fifth spacing D5 > the sixth spacing D6 > the seventh spacing D7 > the second spacing D2.

[0048] With such an arrangement, it is possible to effectively compensate for the solvent concentration in the VCD atmosphere at each position in the second opening K2, making the uniformity of the solvent concentration in the VCD atmosphere at each position in the second opening K2 better, and further ensuring the consistency of the solvent evaporation rate in the display area AA, so as to improve the film thickness uniformity of the light-emitting layer in the display area AA.

[0049] In some embodiments, as Figures 2 to 4 shown, the second region A2 faces away from the first region A1 along the first direction X. Each spacer portion 31 extends along the second direction Y and is connected to the extension portion 22, and the second direction Y intersects the first direction X. For example, the second direction Y is perpendicular to the first direction X. In this case, the extending direction of the spacer portion 31 is perpendicular to its arranging direction.

[0050] By arranging the spacer portion 31 to extend along the second direction Y and be connected to the extension portion 22, in this way, the arrangement space of the spacer portion 31 in the second opening K2 can be effectively increased, thereby effectively increasing the contact area between the solution around the spacer portion 31 and the vacuum, and further enabling the solvent concentration in the VCD atmosphere at each position in the second opening K2 to achieve a good compensation effect. This is beneficial to improving the film thickness uniformity of the light-emitting layer in the display area AA, thereby improving the display effect of the display panel 100.

[0051] In some examples, the spacer portion 31 includes a bottom and a top connected to the bottom, and the top surface can be an arc surface. In this way, the contact area between the solution above the spacer portion 31 and the vacuum can be increased, thereby further improving the solvent concentration in the VCD atmosphere at each position in the second opening K2. As an example, the section of the top surface can be half of an ellipse, and the section direction is along the thickness direction Z of the display panel 100.

[0052] In some embodiments, as Figure 2As shown, the extension part 22 defines a plurality of second openings K2. Each second opening K2 is arranged side by side with a plurality of corresponding first openings K1 in the third direction, and in the fourth direction, the size of the second opening K2 is equal to the size of the corresponding first opening K1. The fourth direction is perpendicular to the third direction. Among them, one of the third direction and the fourth direction is the first direction X, and the other is the second direction Y.

[0053] By setting the size of each second opening K2 to be the same as that of the corresponding first opening K1 in the same direction, it is convenient to fabricate the second opening K2, and at the same time, it is also beneficial to print the solution with the light-emitting material into the second opening K2 and the first opening K1 during inkjet printing.

[0054] In some embodiments, as Figure 3 shown, the extension part 22 includes a base 221 and side walls (including a first side wall 222 and a second side wall 223). Along the thickness direction Z of the display panel 100, the first dimension H1 of the spacer 31 is greater than or equal to 1 / 3 of the second dimension H2 of the side wall and less than or equal to 4 / 3 of the second dimension H2 of the side wall.

[0055] With such a setting, the height of the spacer 31 (i.e., the first dimension H1 of the spacer 31) can be better adapted to the height of the solution with the light-emitting material printed in the second opening K2, thereby effectively increasing the contact area between the solution and the vacuum. In this way, on the one hand, it avoids the problem that the first dimension H1 of the spacer 31 is set too small, resulting in too small an increase in the contact area between the solution and the vacuum. On the other hand, it avoids the problem that the first dimension H1 of the spacer 31 is set too large, which affects the layout of the upper film layer.

[0056] In some examples, along the thickness direction Z of the display panel 100, the first dimension H1 of the spacer 31 can be equal to 1 / 3, 1 / 2, 2 / 3, 3 / 4, or 4 / 3, etc. of the second dimension H2 of the side wall.

[0057] In some examples, the material of the spacer 31 can be the same as that of the pixel defining layer 20. In this way, the spacer 31 and the pixel defining layer 20 can be fabricated through one process, thereby improving the fabrication efficiency of the display panel 100.

[0058] As an example, the spacer 31 can be fabricated using a hydrophilic material. The hydrophilic material can be, for example, a hydrophilic polymer, a modified polymer, or an oxide material.

[0059] In some embodiments, along the thickness direction Z of the display panel 100, the size of the extension part 22 can be the same as the size of the main body part 21.

[0060] In some examples, along the first direction X, the size of the second opening K2 can be larger than the size of the first opening K1. This can save the material of the extension part 22 and is beneficial to improving the regularity of the density distribution of the spacer part 31, and then ultimately improving the film thickness uniformity of the light-emitting layer in the display area AA, so as to improve the display effect of the display panel 100.

[0061] In some embodiments, as Figure 5 shown, a capillary liquid absorption layer 41 is provided on the surface of the spacer part 31, and the capillary liquid absorption layer 41 covers the top surface 311 and at least part of the side surface 312 of the spacer part 31.

[0062] In this embodiment, the capillary liquid absorption layer 41 can attract the solvent located on the side surface of the spacer part 31 above the spacer part 31 through capillary action, thereby increasing the evaporation rate of the solvent. In this way, the uniformity of the solvent concentration in the VCD atmosphere at each position in the second opening K2 can be improved, and then it is beneficial to improve the film thickness uniformity of the light-emitting layer in the display area AA, so as to improve the display effect of the display panel 100.

[0063] As an example, the capillary liquid absorption layer 41 can form a flocculent structure on the surface of the spacer part 31. Of course, the capillary liquid absorption layer 41 can be in the form of a groove capillary structure, a wire mesh capillary structure or a fiber capillary structure, etc., and the embodiments of the present application do not limit this.

[0064] In some examples, the capillary liquid absorption layer 41 can completely cover the opposite two side surfaces of the spacer part 31 along the first direction X, so as to achieve a good solvent attraction effect. Of course, the capillary liquid absorption layer 41 can also cover a part of the opposite two side surfaces of the spacer part 31 along the first direction X. For example, the capillary liquid absorption layer 41 covers to the middle position of the opposite two side surfaces of the spacer part 31 along the first direction X.

[0065] In some embodiments, as Figure 6 shown, Figure 6 shows Figure 2 another structure of the spacer part 31 in the second opening K2, the second region A2 deviates from the first region A1 along the first direction X, and a plurality of spacer parts 31 are arranged in sequence along the first direction X. Each spacer part 31 includes a plurality of spacer blocks 310 arranged along the second direction Y, and the second direction Y intersects the first direction X (for example, the second direction Y is perpendicular to the first direction X). Among them, along the first direction X, the number of spacer blocks 310 in each spacer part 31 gradually increases.

[0066] In this embodiment, since the spacer 31 includes a plurality of spacer blocks 310 arranged along the second direction Y, the arrangement density of the spacer 31 at each position can be adjusted by the number and size of the spacer blocks 310 in the spacer 31. Thus, the arrangement density of the spacer 31 in the first region A1 can be made smaller than that of the spacer 31 in the second region A2, and the gradual change of the arrangement density of the spacer 31 along the first direction X can be further achieved. Furthermore, an effective compensation for the solvent concentration in the VCD atmosphere at the position where the spacer 31 is located in the second opening K2 can be realized, making the uniformity of the solvent concentration in the VCD atmosphere at the position where the spacer 31 is located in the second opening K2 better. In this way, the consistency of the evaporation rate of the solvent in the display area AA can be ensured, thereby improving the film thickness uniformity of the light-emitting layer in the display area AA.

[0067] In some embodiments, please continue to refer to Figure 6 , the multiple spacer blocks 310 in each spacer 31 are arranged at equal intervals. That is, the distance between adjacent spacer blocks 310 in each spacer 31 is equal. Among them, along the first direction X, the distance between adjacent spacer blocks 310 in each spacer 31 gradually decreases.

[0068] As an example, the first spacer and the second spacer are arranged in sequence along the first direction. The distance between adjacent spacer blocks 310 in the first spacer is greater than the distance between adjacent spacer blocks 310 in the second spacer.

[0069] With such an arrangement, on the one hand, the arrangement of the spacer blocks 310 in the second opening K2 can be relatively regular, which is conducive to ensuring the uniform evaporation of the solvent in the second opening K2. On the other hand, by controlling the distance between adjacent spacers 31, the adjustment of the arrangement density of the spacers 31 at each position can be realized, so that the arrangement density of the spacers 31 in the first region A1 can be made smaller than that of the spacers 31 in the second region A2, and the gradual change of the arrangement density of the spacers 31 along the first direction X can be further achieved. Ultimately, the film thickness uniformity of the light-emitting layer in the display area AA can be improved.

[0070] In some embodiments, please continue to refer to Figure 6 , along the first direction X, the distance between adjacent spacers 31 gradually decreases.

[0071] By setting it in this way, the arrangement density of the spacer 31 at each position can be jointly adjusted from two aspects: adjusting the quantity and size of the spacer blocks 310 in the adjustment section 31 and controlling the spacing between adjacent spacers 31 along the first direction X. In this way, more precise control of the arrangement density can be achieved, thereby realizing precise and effective compensation for the solvent concentration in the VCD atmosphere at the position of the spacer 31 in the second opening K2, so as to further improve the uniformity of the solvent concentration in the VCD atmosphere at the position of the spacer 31 in the second opening K2. In this way, the consistency of the evaporation rate of the solvent in the display area AA can also be ensured, thereby improving the film thickness uniformity of the light-emitting layer in the display area AA.

[0072] As an example, Figure 6 Six spacers 31 arranged along the first direction X are shown. The six spacers 31 sequentially have a third spacing D3, a fourth spacing D4, a fifth spacing D5, a sixth spacing D6, and a seventh spacing D7 along the first direction X, and the third spacing D3, the fourth spacing D4, the fifth spacing D5, the sixth spacing D6, and the seventh spacing D7 gradually decrease in sequence.

[0073] In some embodiments, the extension portion 22 has a first side wall 222 and a second side wall 223 sequentially arranged along the first direction X. The plurality of spacers 31 includes a first spacer close to the first side wall 222 and a second spacer close to the second side wall 223. The first spacer and the first side wall 222 have a first spacing D1, and the second spacer and the second side wall 223 have a second spacing D2; wherein, the first spacing D1, the spacing between adjacent spacers in the plurality of spacers (i.e., the third spacing D3 to the seventh spacing D7), and the second spacing D2 gradually decrease. That is to say, the first spacing D1 > the third spacing D3 > the fourth spacing D4 > the fifth spacing D5 > the sixth spacing D6 > the seventh spacing D7 > the second spacing D2.

[0074] By setting it in this way, effective compensation can be achieved for the solvent concentration in the VCD atmosphere at each position in the second opening K2, making the uniformity of the solvent concentration in the VCD atmosphere at each position in the second opening K2 better, and further ensuring the consistency of the evaporation rate of the solvent in the display area AA, so as to improve the film thickness uniformity of the light-emitting layer in the display area AA.

[0075] In some examples, the spacer block 310 may include a base and an end portion located on the base, and the surface of the end portion may be an arc surface. In this way, the contact area between the solution located above the spacer block 310 and the vacuum can be increased, thereby further improving the solvent concentration in the VCD atmosphere at each position in the second opening K2. As an example, the end portion may be hemispherical.

[0076] In some embodiments, a capillary liquid absorption layer 41 is provided on the surface of the spacer block 310, and the capillary liquid absorption layer 41 covers the top surface and at least part of the side surfaces of the spacer portion 31. Due to the provision of the capillary liquid absorption layer 41, the solvent located on the side surface of the spacer block 310 can be attracted above the spacer block 310 through capillary action, thereby increasing the evaporation rate of the solvent. In this way, the uniformity of the solvent concentration in the VCD atmosphere at various positions within the second opening K2 can be improved, which is conducive to improving the film thickness uniformity of the light-emitting layer within the display area AA, so as to enhance the display effect of the display panel 100.

[0077] Regarding the capillary liquid absorption layer 41 located on the surface of the spacer block 310, it can be set with reference to the capillary liquid absorption layer 41 located on the surface of the spacer portion 31, and details will not be elaborated here.

[0078] In some embodiments, such as Figure 2 、 Figure 7 and Figure 8 shown, the non-display area NA includes a virtual pixel area NA1 and a wiring area NA2. The second openings K2 are all located within the virtual pixel area NA1, and the wiring area NA2 is used to lay out the signal lines of the display panel 100.

[0079] To further demonstrate the technical effects of the embodiments of the present application, the inventor conducted the following comparative tests. As Figure 9 shown, the first curve S1 in the figure represents the VCD atmosphere uniformity curve corresponding to the display panel in the related art without virtual pixels set in the virtual pixel area NA1, the second curve S2 represents the VCD atmosphere uniformity curve corresponding to the display panel in the related art with virtual pixels set in the virtual pixel area NA1 but without spacer portions, and the third curve S3 represents the VCD atmosphere uniformity curve corresponding to the display panel in the embodiments of the present application with virtual pixels set in the virtual pixel area NA1 and the arrangement density of the spacer portions in the first area of the virtual pixel area NA1 being less than that in the second area. Among them, the atmosphere uniformity represents the uniformity of the solvent concentration in the VCD atmosphere. As Figure 9 can be seen, due to the provision of spacer portions in the virtual pixel area NA1 in the embodiments of the present application and the arrangement density of the spacer portions in the first area being less than that in the second area, the VCD atmosphere uniformity has been significantly improved both in the display area AA and the non-display area NA (such as the virtual pixel area NA1). For example, it can effectively improve the thickness uniformity of the light-emitting layer in the display area, thereby effectively improving the problem of uneven display at the edge position of the display panel 100.

[0080] In some examples, such as Figure 7 and Figure 8As shown, the virtual pixel region NA1 includes a third region A3. The third region A3 is adjacent to a second opening K2 in the first direction X and adjacent to another second opening K2 in the second direction Y. In the third region A3, a spacer 31 is provided within the opening defined by the extension portion 22. The arrangement of the spacer 31 can be set by referring to the arrangement of the spacer 31 within the second opening K2 arranged along the second direction Y (as shown in Figure 7 ), or can be set by referring to the arrangement of the spacer 31 within the second opening K2 arranged along the first direction X (as shown in Figure 8 ).

[0081] Some embodiments of the present application further provide a display device. As shown in Figure 10 , the display device 1000 includes the display panel 100 described in any of the above embodiments.

[0082] Since it includes the display panel 100, the display device 1000 has the technical effects of the above display panel 100, which will not be elaborated here.

[0083] In some examples, the display device 1000 further includes a mounting bracket 200 for fixing the display panel 100 to facilitate the user's use of the display panel 100.

[0084] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A display panel, characterized in that, It has a display area and a non-display area. The non-display area includes a first area and a second area arranged in sequence along a direction away from the display area. The display panel includes: a substrate; a pixel definition layer disposed on the substrate. The pixel definition layer includes a main body portion and an extension portion. The main body portion defines a plurality of first openings located in the display area, and the extension portion defines at least one second opening located in the non-display area; and a plurality of spaced-apart spacer portions disposed in the second opening; wherein, the arrangement density of the spacer portions located in the first area is less than the arrangement density of the spacer portions located in the second area.

2. The display panel according to claim 1, wherein Along the direction in which the second area faces away from the first area, the plurality of spacer portions are arranged in sequence, and the distance between adjacent spacer portions gradually decreases.

3. The display panel according to claim 2, wherein The second area faces away from the first area in a first direction. The extension portion includes a first side wall and a second side wall arranged in sequence along the first direction; The plurality of spacer portions include a first spacer portion close to the first side wall and a second spacer portion close to the second side wall. The first spacer portion and the first side wall have a first distance, and the second spacer portion and the second side wall have a second distance; wherein, the first distance, the distance between adjacent spacer portions among the plurality of spacer portions, and the second distance gradually decrease.

4. The display panel according to claim 2, wherein The second area faces away from the first area in a first direction. Each spacer portion extends along a second direction and is connected to the extension portion, and the second direction intersects with the first direction.

5. The display panel according to claim 2, wherein A capillary liquid absorption layer is provided on the surface of the spacer portion, and the capillary liquid absorption layer covers the top surface and at least part of the side surface of the spacer portion.

6. The display panel according to claim 1, wherein The second area faces away from the first area in a first direction. The plurality of spacer portions are arranged in sequence along the first direction; each spacer portion includes a plurality of spacer blocks arranged along a second direction, and the second direction intersects with the first direction; wherein, along the first direction, the number of the spacer blocks in each spacer portion gradually increases.

7. The display panel according to claim 6, wherein The plurality of spacer blocks in each spacer portion are arranged at equal intervals; wherein, along the first direction, the distance between adjacent spacer blocks in each spacer portion gradually decreases.

8. The display panel according to claim 6, wherein Along the first direction, the distance between adjacent spacer portions gradually decreases.

9. The display panel according to claim 6, wherein A capillary liquid absorption layer is provided on the surface of the spacer block, and the capillary liquid absorption layer covers the top surface and at least part of the side surface of the spacer portion.

10. The display panel according to any one of claims 1-9, characterized in that, The extension portion includes a base and a side wall. Along the thickness direction of the display panel, the size of the spacer portion is greater than or equal to 1 / 3 of the size of the side wall and less than or equal to 4 / 3 of the size of the side wall.

11. The display panel according to any one of claims 1-9, characterized in that, The extension portion defines a plurality of the second openings; Each of the second openings is arranged side by side with a plurality of corresponding first openings in a third direction, and along a fourth direction, the size of the second opening is equal to the size of the corresponding first opening, and the fourth direction is perpendicular to the third direction.

12. A display device, characterized in that, including: the display panel according to any one of claims 1-11.

Images