Display panel and manufacturing method thereof, and display device

Abstract

The embodiment of the present invention discloses a display panel and a preparation method thereof, and a display device, wherein the display panel includes a display area, the display area includes a first display area, and the display panel includes: a substrate; a pixel defining layer, located on one side of the substrate, the pixel defining layer includes a plurality of pixel openings, and a light-emitting element is arranged in the pixel opening; a plurality of support columns, located on the side of the pixel defining layer away from the substrate; in the first display area, the support columns include at least one first support column, and the distances between the first support column and the pixel openings on both sides thereof are different in a direction parallel to the plane where the substrate is located. By adopting the technical solution provided by the embodiment of the present invention, the first support column is arranged at a position where the distances between the pixel openings on both sides thereof are different, and when cathode patterning is subsequently performed by laser, patterning defects caused by uneven laser power in the first display area can be avoided, and the light transmission effect of the display panel in the first display area can be ensured.

Description

Technical Field

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

[0002] Display panels with a high screen-to-body ratio are becoming more and more popular among consumers. Currently, in order to increase the screen-to-body ratio of a display panel, a display area with a certain degree of light transmittance is usually added to the display area of ​​the display panel, and a camera module and the like are installed in this area.

[0003] However, display panels with light-transmitting areas still have other problems that need to be improved, such as uneven light transmission in the light-transmitting areas, which affects the display effect. Summary of the invention

[0004] Embodiments of the present invention provide a display panel and a method for manufacturing the same, and a display device to solve the problem of uneven light transmission effect in a light transmission area of ​​a display panel in the prior art.

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

[0006] substrate substrate;

[0007] A pixel defining layer, located on one side of the base substrate, the pixel defining layer comprising a plurality of pixel openings, wherein light emitting elements are disposed in the pixel openings;

[0008] A plurality of support pillars are located on a side of the pixel defining layer away from the substrate;

[0009] In the first display area, the support columns include at least one first support column, and along a direction parallel to the plane where the base substrate is located, the distances between the first support column and the pixel openings on two adjacent sides thereof are different.

[0010] In a second aspect, an embodiment of the present invention provides a method for manufacturing a display panel, comprising:

[0011] providing a substrate base plate;

[0012] A pixel defining layer, a support column and a plurality of light-emitting elements are formed on one side of the base substrate, wherein the light-emitting elements include an anode, a light-emitting layer and a cathode stacked in sequence in a direction away from the base substrate;

[0013] Irradiating the base substrate with laser light to form a cathode layer including a hollow portion in the first display area;

[0014] Along the direction perpendicular to the display panel, the projection of the support column on the base substrate does not overlap with the projection of the hollow portion on the base substrate; and the vertical projection of the support column on the base substrate at least partially surrounds the vertical projection of the light-emitting layer on the base substrate.

[0015] In a third aspect, an embodiment of the present invention provides a display device, comprising the display panel described in any one of the first aspects.

[0016] The display panel provided by the embodiment of the present invention includes a display area, and the display area includes a first display area. The display panel also includes a substrate, a pixel defining layer, and a plurality of support columns. In the first display area, the support columns include at least one first support column. In a direction parallel to the plane where the substrate is located, the distances between the first support column and the pixel openings of the pixel defining layers on both sides adjacent to it are different. By arranging the first support column at a position where the distances between the pixel openings on both sides adjacent to each other are different, when cathode patterning is performed by laser in the subsequent process, patterning defects caused by uneven laser power in the first display area can be avoided, thereby ensuring the light transmission effect of the display panel in the first display area, thereby improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required to describe the embodiments. Obviously, the drawings introduced are only drawings of a part of the embodiments to be described in the present invention, rather than all the drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a display panel provided by the prior art;

[0019] Figure 2 yes Figure 1 A magnified schematic diagram of the middle A area;

[0020] Figure 3 yes Figure 2 A schematic diagram of a cross-sectional structure along the section line BB';

[0021] Figure 4 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0022] Figure 5 yes Figure 4 An enlarged schematic diagram of the middle C region;

[0023] Figure 6 yes Figure 5 A schematic diagram of a cross-sectional structure along the section line D-D';

[0024] Figure 7 yes Figure 5 Another schematic diagram of the cross-sectional structure along the section line D-D';

[0025] Figure 8 yes Figure 4 Another enlarged schematic diagram of the middle C area;

[0026] Fig. 9 yes Figure 4 Another enlarged schematic diagram of the middle C area;

[0027] Fig.10 yes Figure 4 Another enlarged schematic diagram of the middle C area;

[0028] Fig.11 yes Figure 5 Another schematic diagram of the cross-sectional structure along the section line D-D';

[0029] Fig.12 yes Figure 5 Another schematic diagram of the cross-sectional structure along the section line D-D';

[0030] Fig.13 yes Figure 5 Another schematic diagram of the cross-sectional structure along the section line D-D';

[0031] Fig.14 yes Figure 4 Another enlarged schematic diagram of the middle C area;

[0032] Fig.15 yes Figure 5 Another schematic diagram of the cross-sectional structure along the section line D-D';

[0033] Fig.16 yes Figure 5 Another schematic diagram of the cross-sectional structure along the section line D-D';

[0034] Fig.17 yes Figure 4 Another enlarged schematic diagram of the middle C area;

[0035] Fig.18 yes Fig.17 A schematic diagram of a cross-sectional structure along the section line E-E';

[0036] Fig.19 yes Figure 4 Another enlarged schematic diagram of the middle C area;

[0037] Fig. 20 yes Figure 4 Another enlarged schematic diagram of the middle C area;

[0038] Fig.21 yes Figure 4 A schematic diagram of a cross-sectional structure along the section line F-F';

[0039] Fig. 22 is a schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the invention;

[0040] Fig.23 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] Figure 1 is a structural schematic diagram of a display panel provided by the prior art. Figure 2 yes Figure 1 A magnified schematic diagram of area A in the middle. Figure 3 yes Figure 2 A schematic diagram of a cross-sectional structure along the section line B-B', refer to Figures 1 to 3 As shown, the display panel 10' includes a first display area 110' including a light-transmitting area and a normal display area 120'. Figure 2 and Figure 3 As shown, the display panel 10' further includes a base substrate 210', a pixel defining layer 220' and a plurality of support columns 230'. Figure 2 and Figure 3A support column 230' is used as an example for illustration. Specifically, the pixel defining layer 220' includes a plurality of pixel openings 221', and a light-emitting element 300' is arranged in the pixel opening 221', and the display light of the display panel 10' is realized by the light-emitting element. Furthermore, the cathode layer 310' in the light-transmitting area 110' needs to be patterned to form a cathode patterned layer 310A', so as to increase the transmittance of the light-transmitting area to external light. In the process of laser patterning of the cathode layer 310', the laser light penetrates from the side of the base substrate 210' away from the light-emitting element, so that the cathode layer 310' is laser-etched to form a cathode patterned layer 310A'. Among them, the laser source emits laser from the backlight side of the display panel 10' to the film layer that needs to be partially etched, that is, the laser is emitted from the side of the base substrate 210' away from the light-emitting element to the film layer that needs to be partially etched. The inventors have discovered through research that in the prior art, support columns 230' are provided in the light-transmitting area 110' to support the display panel 10', but when the cathode layer 310' is patterned, the support columns 230' located in the middle of adjacent pixel openings 221' will interfere with the transmission path of the laser, that is, there will be an energy difference when the laser passes through the film layer with the support columns 230' and the film layer without the support columns 230', resulting in uneven preparation of the cathode patterned layer 310A', thereby affecting the display effect of the light-transmitting area 110' of the display panel 10'.

[0043] To solve the above technical problems, an embodiment of the present invention provides a display panel, including a display area, the display area including a first display area, the display panel including: a base substrate; a pixel defining layer located on one side of the base substrate, the pixel defining layer including a plurality of pixel openings, light-emitting elements being arranged in the pixel openings; a plurality of support columns located on a side of the pixel defining layer away from the base substrate; in the first display area, the support columns include at least one first support column, and the distances between the first support column and the pixel openings on both adjacent sides thereof are different along a direction parallel to the plane of the base substrate.

[0044] Specifically, when the laser passes through the support column and the film layer without the support column, there will be a difference in laser energy, which will affect the laser transmission and thus affect the degree of cathode layer patterning. This is because the support column has a supporting effect on the film layer, so the thickness of the film layer with the support column will be higher than the thickness of the film layer without the support column. Furthermore, when the laser passes through the film layer with the support column and the film layer without the support column, the difference in film thickness and the difference in refractive index between different film layers will cause the laser light to be refracted to different degrees, thus affecting the transmission of the laser light. Furthermore, when the cathode layer is subsequently patterned by laser, the cathode removal effect above the support column will be unstable, resulting in defects in the cathode layer patterning, thus affecting the display effect. The inventor has discovered through research that the support columns need to support the film layer in the display panel. If the support columns located between the pixel openings are removed to solve the above problem, although the defects of the cathode layer patterning can be improved, the flatness of the film layer between the pixel openings will be affected. Furthermore, when the laser is patterning the cathode layer, due to the uneven film layer between the pixel openings, when the laser light is irradiated on the film layers of different thicknesses, refraction in different directions will occur, which will affect the removal effect of the cathode layer and thus affect the display effect. Therefore, the provision of support columns is essential.

[0045] The present invention sets the first support column at a position different from the distance between the pixel openings on the adjacent two sides, that is, the first support column is set at a position deviating from the center of the pixel openings on the adjacent two sides. Optionally, the first support column is transferred to a position close to the edge of the adjacent pixel opening, so that the first support column is located below the cathode of the light-emitting element, thereby solving the problem that the cathode layer patterning has defects when the laser light removes the cathode layer located between the pixel openings, and further improving the light transmission effect between the pixel openings. At the same time, the flatness of the film layer between the pixel openings can also be guaranteed. That is, the present invention improves the light transmission effect of the display panel in the first display area while ensuring the flatness of the display panel, thereby improving the display effect of the display panel as a whole.

[0046] The above is the core idea of ​​the present invention. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Figure 4 is a schematic structural diagram of a display panel provided by an embodiment of the present invention, Figure 5 yes Figure 4 An enlarged schematic diagram of the C region in the middle. Figure 6 yes Figure 5 A schematic diagram of a cross-sectional structure along the section line D-D', Figure 7 yes Figure 5Another cross-sectional structure diagram along the section line D-D', refer to Figures 4 to 7 As shown, the display panel 10 provided by the embodiment of the present invention includes a display area 100, and the display area 100 includes a first display area 110. The display panel 10 includes: a base substrate 210; a pixel defining layer 220, which is located on one side of the base substrate 210, and the pixel defining layer 220 includes a plurality of pixel openings 221, in which a light-emitting element 300 is arranged, that is, the pixel opening 221 defines the light-emitting area of ​​the light-emitting element 300, in other words, the edge of the light-emitting element 300 is the edge of the pixel opening 221; a plurality of support columns 230, which are located on the side of the pixel defining layer 220 away from the base substrate 210; in the first display area 110, the support columns 230 include at least one first support column 231, and the distances between the first support column 231 and the pixel openings 221 on both sides thereof are different in a direction parallel to the plane where the base substrate 210 is located.

[0048] Among them, reference Figures 4 to 7 As shown, the display panel 10 includes a display area 100, and the display area 100 is used to realize the display function of the display panel 10. Exemplarily, the embodiment of the present invention takes the display panel 10 as an organic light emitting diode display panel as an example for explanation. Optionally, the display panel 10 can also be a micro light emitting diode display panel or other types of display panels, and the present invention does not limit the specific type of the display panel 10. The display panel 10 includes a structure for realizing a display function, such as a base substrate 210, a pixel defining layer 220, and a pixel opening 221 and a light emitting element 300 provided in the pixel defining layer 220.

[0049] Optional, reference Figure 7 The pixel opening 221 is used to limit the size of the light-emitting element 300. The light-emitting element 300 is driven to display light through the pixel driving circuit 600 located on the base substrate 210 in the display panel 10. The pixel driving circuit 600 may include at least one thin film transistor. The specific implementation of the pixel driving circuit 600 can be set by those skilled in the art according to actual conditions and is not limited here. For example, the pixel driving circuit includes "7T1C", "2T1C", etc., where "T" represents a thin film transistor and "C" represents a capacitor.

[0050] Furthermore, the display area 100 of the display panel 10 includes a first display area 110, and the first display area 110 has a higher transmittance to external light. Then, the area where the first display area 110 is located can be used to set optical functional elements. For example, a camera, a fingerprint recognition structure, or other devices integrated with a light sensor can be set below the first display area 110. In addition to being able to realize the function of luminous display, the first display area 110 can also realize the function of optical signal transmission, such as taking pictures, biometric recognition, and the like. That is, while realizing the display function, the first display area 110 can also transmit external light, thereby realizing the functions of shooting or user face unlocking, etc. The embodiment of the present invention does not specifically limit the function of the first display area 110.

[0051] Specifically, in an exemplary embodiment, reference is made to Figure 6 and Figure 7 As shown, the cathode layer 310 is patterned in the first display area 110. The cathode layer 310 is usually made of magnesium silver material. The magnesium silver material has a significant reflection effect on light and a poor transmission effect on light. Therefore, the cathode layer 310 in the first display area 110 is set to include a hollow area 310A and a non-hollow area 310B, which can significantly improve the transmission effect of the first display area 110 on light and reduce the reflection effect of the first display area 110 on light, ensuring that the first display area 110 can transmit external light through the hollow area 310A, and the first display area 110 can realize the display function through the non-hollow area 310B. When the cathode layer 310 is patterned, the laser is emitted from the side of the substrate 200 away from the base substrate 210 to the cathode layer 310, and the laser light removes part of the cathode layer 310 to form the hollow area 310A, and the laser light does not remove part of the cathode layer 310 to form the non-hollow area 310B.

[0052] Furthermore, at least one first support column 231 is included in the first display area 110 for supporting the display panel 10 in the first display area 110. The figure only takes one first support column 231 as an example for illustration, and the embodiment of the present invention does not impose a specific restriction on the number of first support columns 231. When designing the patterning of the cathode layer 310, when the laser passes through the first support column 231 and the film layer without the first support column 231, there will be a difference in laser energy, which will affect the laser transmission and further affect the patterning degree of the cathode layer 310. Therefore, the distance between the first support column 231 and its two adjacent pixel openings 221 is different. Figure 6 and Figure 7As shown, the distances between the first support column 231 and the centers of two adjacent pixel openings 221 are L1 and L2, respectively, and L1 is not equal to L2. By the above-mentioned arrangement of the first support column 231, the regular arrangement of the first support column 231 in the first display area 110 can be broken, and the influence of the first support column 231 on the pattern design of the cathode layer 310 can be weakened. In addition, the arrangement of the first support column 231 off the center can improve the light transmission effect between the pixel openings 221 and ensure the flatness of the film layer between the pixel openings 221.

[0053] For further reference, Figure 6 and Figure 7 As shown, the light emitting element 300 includes an anode 331, a light emitting layer 321, and a cathode 311 stacked in sequence in a direction away from the substrate 210. To ensure that the light emitting element 300 emits light normally, the cathode 311 of the light emitting element 300 cannot be removed. At the same time, on the one hand, it is based on preventing the process error existing in the preparation process of the light emitting element 300 from affecting the light emitting element 300; on the other hand, based on the cathode 311 being designed as a whole surface to ensure the electrical connection between different light emitting elements 300, therefore, the cathode 311 of the light emitting element 300 will extend to the area outside the pixel opening 221, that is, the cathode 311 of the light emitting element 300 has a redundant area during the preparation process, that is, the size of the cathode 311 is larger than the size of the pixel opening 221, and the redundant area of ​​the cathode 311 is necessarily set. In this embodiment, the first support column 231 can be set close to its adjacent pixel opening 221, that is, the first support column 231 is set in the redundant area of ​​the cathode 311. In other words, along the direction perpendicular to the display panel, the first support column 231 can be located within the projection range of the cathode 311 on the base substrate 210, that is, the cathode layer 310 corresponding to the first support column 231 is a redundant area reserved for the cathode 311 when the light-emitting element 300 is prepared, and the cathode 311 is to be retained, and the cathode layer 310 at the pixel opening 221 is not designed with a hollow area 310A. In this embodiment, the position of the first support column 231 is optimized so that it does not appear in the area between the pixel openings 221 that needs to be scanned by the laser, wherein the area that needs to be scanned by the laser refers to the area outside the coverage of the cathode 311 of the light-emitting element 300, that is, the influence of the first support column 231 on the laser transmission path is avoided from the root, so that the film structure in the laser scanning area is uniform, and the energy difference generated when the laser passes through different film structures is further reduced, thereby achieving uniform patterning of the cathode layer 310 and ensuring the display effect of the display panel 10.

[0054] In summary, the display panel 10 provided by the embodiment of the present invention has a display area 100 of which includes a first display area 110. The display panel 10 also includes a base substrate 210, a pixel defining layer 220 and a plurality of support columns 230. In the first display area 110, the support columns 230 include at least one first support column 231. In a direction parallel to the plane where the base substrate 210 is located, by arranging the first support columns 231 at positions with different distances between the pixel openings 221 on adjacent sides, when the cathode layer 310 is subsequently patterned by a laser, patterning defects caused by uneven laser power in the first display area 110 can be avoided, thereby ensuring the light transmittance of the display panel 10 in the first display area 110, thereby improving the display effect of the display panel 10.

[0055] Continue to refer Figure 6 and Figure 7 As shown, the cathode layer 310 of the light emitting element 300 includes a hollow portion 310A, the hollow portion 310A is located in the first display area 110, and along the second direction h, the projection of the support column 230 on the base substrate 210 does not overlap with the projection of the hollow portion 310A on the base substrate 210, wherein the second direction h is a direction perpendicular to the display panel 10. .

[0056] Specifically, refer to Figure 6 and Figure 7 As shown, the cathode layer 310 includes a hollow area 310A and a non-hollow area 310B, that is, after laser etching, a hollow area 310A is formed at the cathode layer 310, so that the first display area 110 can obtain external light at the hollow area 310A. The non-hollow area 310B is formed at the cathode layer 310 without laser etching, so that the first display area 110 can display at the non-hollow area 310B, that is, along the second direction h, the non-hollow area 310B overlaps with the light-emitting element 300, ensuring the display and light emission of the light-emitting element 300, and realizing the display function of the display panel 10.

[0057] Furthermore, the projection of the support column 230 and the hollow area 310A at the base substrate 210 does not overlap, that is, the support column 230 is not set at the position where laser etching is to be performed to form the hollow area 310, that is, the support column 230 can be set close to the pixel opening 221. In this case, the cathode 311 at the position close to the pixel opening 221 is not removed, that is, in the second direction h, the laser is shielded at the position corresponding to the cathode 311, thereby ensuring that the cathode layer 310 here is not etched. When the support column 230 is set at this position, no laser will be transmitted to the position where the support column 230 is located, that is, the influence of the support column 230 on the laser transmission can be avoided, thereby avoiding the situation where the laser power is uneven and causes patterning defects. The support column 230 can also be directly set at the edge of the pixel opening 221, that is, the support column 230 is located at the edge of the pixel opening 221, and overlaps with the cathode 311 and the anode 331 of the light-emitting element 300, which also avoids the situation where the laser power is uneven and causes patterning defects. This prevents the support column 230 from affecting the transmission of laser light when patterning the cathode layer 310, avoids uneven laser power in the first display area 110 causing patterning defects of the cathode layer 310, ensures the light transmittance of the display panel 10 in the first display area 110, and further improves the display effect of the display panel 10.

[0058] Continue to refer Figure 6 and Figure 7 As shown, along the first direction X, the distance L3 from the side of the first support column 231 close to the light emitting element 300 to the pixel opening 221 is 0-5 micrometers; wherein the first direction X is a direction parallel to the plane where the display panel 10 is located.

[0059] Among them, reference Figure 6 and Figure 7 As shown, the distance between the first support column 231 and the pixel openings 221 on both sides thereof is different. Specifically, the distance L3 between the side of the first support column 231 close to the light emitting element 300 and the pixel opening 221 is 0-5 microns. For example, it can be 0 microns, that is, it fits the first pixel opening. It can also be 2 microns, 2.5 microns, 3 microns or 5 microns, etc., that is, the first support column 231 can be infinitely close to the adjacent pixel opening 221, or even fit the pixel opening 221. Further, refer to Figure 6 and Figure 7 As shown, the distance L3 from the side of the first support column 231 close to the light emitting element 300 to the pixel opening 221 is the distance between the first support column 231 and the edge of the pixel opening 221. The distance L3 from the side of the first support column 231 close to the light emitting element 300 to the pixel opening 221 may also be the distance between the first support column 231 and the center of the pixel opening 221, but in this case, L3 is not equal to 0, and the embodiment of the present invention does not specifically limit this.

[0060] Optionally, the first support column 231 may be disposed below the cathode 311 of the light emitting element 300, that is, along the second direction h, the positions of the first support column 231 and the cathode 311 overlap. Figure 6 and Figure 7 As shown, this arrangement can increase the coverage area of ​​the cathode 311 , achieve coverage of the first support column 231 , and avoid the situation where uneven laser power at the position of the first support column 231 causes patterning defects.

[0061] By limiting the positional relationship between the first support column 231 and the pixel opening 221 , it is ensured that the first support 231 will not affect the pattern design of the cathode layer 310 , thereby ensuring the light transmission effect of the display panel 10 in the first display area 110 , thereby improving the display effect of the display panel 10 .

[0062] Continue to refer Figure 6 and Figure 7 As shown, the light emitting element 300 includes an anode 331, a light emitting layer 321, and a cathode 311 stacked in sequence in a direction away from the base substrate 210; and, along the second direction h, the projection of the anode 331 on the base substrate 210 overlaps with the projection of the first support column 231 on the base substrate 210

[0063] Among them, reference Figure 6 and Figure 7 As shown, the light-emitting element 300 includes an anode 331, a light-emitting layer 321 and a cathode 311, and the cathode 311 and the cathode layer 310 are arranged in the same layer. Specifically, the light-emitting layer 321 also includes a hole injection layer, a hole transport layer, an electron blocking layer, an electron injection layer, an electron transport layer and a hole blocking layer, etc., which are not specifically shown in the figure. The embodiment of the present invention does not limit the specific film layer setting, and those skilled in the art can set it according to actual conditions. The display and light emission of the light-emitting element 300 are realized by setting the anode 331, the light-emitting layer 321 and the cathode 311. Specifically, when the electrons and holes generated between the cathode 311 and the anode 331 meet in the light-emitting layer 321, light will be emitted, thereby realizing the display light emission of the display panel 10.

[0064] For further reference, Figure 6 and Figure 7As shown, in order to ensure normal display at the light-emitting element 300, the cathode layer 310 is not patterned at the cathode 311 at the light-emitting element 300, that is, the cathode 311 of the light-emitting element 300 is not irradiated by laser and a hollow area is set. The first support column 231 is set at the anode 331, that is, the projection of the anode 331 on the base substrate 210 overlaps with the projection of the first support column 231 on the base substrate 210. The above-mentioned arrangement of the first support column 231 can avoid the uneven patterning of the cathode layer 310 caused by the arrangement of the first support column 231 without affecting the light-emitting display of the light-emitting element 300, thereby ensuring the light transmission effect of the display panel 10 in the first display area 110, thereby improving the display effect of the display panel 10.

[0065] Continue to refer Figure 6 and Figure 7 As shown, the display panel 10 further includes a light shielding layer 400 , which is located on the side of the light emitting element 300 away from the support column 230 . Along the second direction h, the projection of the light shielding layer 400 on the base substrate 210 overlaps with the projection of the first support column 231 on the base substrate 210 .

[0066] Among them, reference Figure 6 and Figure 7 As shown, the display panel 10 further includes a light shielding layer 400. Specifically, the light shielding layer 400 can block the transmission of light, that is, along the second direction h, the cathode layer 310 where the light shielding layer 400 is set will not be laser etched, while the cathode layer 310 where the light shielding layer 400 is not set will be laser etched, so as to realize the design of the hollow area 310A, that is, to realize the patterned design of the cathode 510. In order to avoid the uneven laser transmission caused by the setting of the support column 230, that is, the uneven patterned design of the cathode layer 310, along the second direction h, the projection of the first support column 231 in the first display area 110 and the light shielding layer 400 overlap. In other words, the light shielding layer 400 covers the first support column 231 along the second direction h. In other words, the setting position of the first support column 231 along the second direction h is located within the setting area of ​​the light shielding layer 400. That is, it is ensured that the pattern design of the cathode layer 310 is not affected on the basis of setting the first support column 231 , thereby ensuring the light transmission effect of the display panel 10 in the first display area 110 , thereby improving the display effect of the display panel 10 .

[0067] Figure 8 yes Figure 4 Another enlarged schematic diagram of the C area in the middle, Fig. 9 yes Figure 4 Another enlarged schematic diagram of the C area in the middle, Fig.10 yes Figure 4 Another enlarged schematic diagram of the C area, see Figures 5 to 10As shown, the projection shape of the first support column 231 on the base substrate 210 is a ring, a ring including at least one opening, or a plurality of block-shaped figures located on the ring; and the projection of at least part of the pixel opening 221 on the base substrate 210 is located within the ring; the display panel 10 also includes a shading layer 400, and the projection shape of the shading layer 400 on the base substrate 210 is the same as the projection shape of the first support column 231 on the base substrate 210.

[0068] Among them, reference Figure 5 , Figures 8 to 10 As shown, the first support column 231 in the first display area 110 is close to or in contact with the adjacent pixel opening 221, so as to ensure that the cathode layer 310 at the first support column 231 is not laser etched, thereby ensuring the balance of the patterning of the cathode layer 310. Exemplarily, the shape of the pixel opening 221 can be a polygon such as a rectangle, a hexagon, and a star, which is not specifically limited in the embodiment of the present invention.

[0069] For example, the shape of the first support column 231 is diverse. Figure 5 As shown, the projection of the first support column 231 on the base substrate 210 is in the shape of a strip or a column, etc., and is located on one side of the pixel opening 221. Figure 8 As shown, the projection of the first support column 231 on the base substrate 210 is annular, and the first support column 231 completely surrounds the pixel opening 221. Fig. 9 As shown, the projection of the first support column 231 on the base substrate 210 is an open ring, and the first support column 231 incompletely surrounds the pixel opening 221, and the location of the opening is not specifically limited. Fig.10 As shown, the projection of the first support column 231 on the base substrate 210 is a plurality of block-shaped patterns, and the plurality of block-shaped patterns of the first support column 231 incompletely surround the pixel opening 221 , and the number and size of the block-shaped patterns are not limited.

[0070] Among them, the first support column 231 is in a ring shape or in a ring shape formed by different forms, etc., which can surround the pixel opening 221. Further, when the light-emitting layer 321 in the light-emitting element 300 is evaporated, the mask in the preparation process will be lifted up by the support column at the pixel opening 221, and there will be an evaporation shadow, which affects the evaporation effect of the light-emitting layer 321. When the first support column 231 provided by the embodiment of the present invention is in a ring-shaped surrounding state, it can isolate the shadow existing during evaporation, ensure the evaporation effect of the light-emitting layer 321, and further avoid color mixing and crosstalk between different light-emitting elements 300, etc., to ensure the light-emitting effect of the light-emitting element 300 and the display effect of the display panel 10.

[0071] Furthermore, the projection shape of the light-shielding layer 400 on the base substrate 210 is the same as the projection shape of the first support column 231 on the base substrate 210, and the shape of the light-shielding layer 400 is adaptively adjusted based on the shapes of the different first support columns 231, thereby ensuring that the cathode layer 310 of the first support column 231 along the second direction h is not laser etched, thereby avoiding the uneven patterning of the cathode layer 310 due to the influence of the support column 230, ensuring the light transmittance of the display panel 10 in the first display area 110, and thereby improving the display effect of the display panel 10.

[0072] Fig.11 yes Figure 5 Another cross-sectional structure diagram along the section line D-D', refer to Figure 6 , Figure 7 and Fig.11 As shown, the display panel 10 also includes a light-shielding layer 400, which is located on the side of the light-emitting element 300 away from the supporting column 230. Along the second direction h, the projection of the light-shielding layer 400 on the base substrate 210 overlaps with the projection of the light-emitting element 300 and the first supporting column 231 on the base substrate 210.

[0073] Among them, reference Figure 6 , Figure 7 and Fig.11 As shown, the display panel 10 includes a light shielding layer 400. By setting the light shielding layer 400, the laser can be prevented from being affected by laser etching on the light emitting element 300 and the pixel driving circuit 600 used to drive the light emitting element 300 to display light. After the light emitting element 300 and the pixel driving circuit 600 are irradiated by the laser, their normal operation will be affected, and the service life of the light emitting element 300 and the pixel driving circuit 600 will be affected, and the display effect of the display panel 10 cannot be guaranteed. Further, by setting the light shielding layer 400, the design of patterning the cathode layer 310 is realized, that is, the cathode layer 310 is not etched at the place where the light shielding layer 400 is set, that is, a non-hollow area 310B is formed, and a first support column 231 is set at the non-hollow area 310B to avoid the situation where the laser power is uneven at the position of the first support column 231. The cathode layer 310 is etched where the light shielding layer 400 is not provided, that is, a hollow area 310A is formed, and there is no position overlap between the first support column 231 and the hollow area 310A, thereby ensuring the light transmission effect of the display panel 10.

[0074] Specifically, refer to Figure 6 , Figure 7 and Fig.11As shown, the light shielding layer 400 overlaps with the projection of the light emitting element 300 on the base substrate 210, that is, the light shielding layer 400 can prevent the laser for patterning the cathode layer 310 from being transmitted to the light emitting element 300, that is, prevent the light emitting element 300 from being irradiated by the laser, and ensure the service life of the light emitting element 300. At the same time, the projection of the first support column 231 on the base substrate 210 overlaps, that is, when the cathode layer 310 is patterned, the first support column 231 is prevented from affecting the transmission of the laser light, ensuring the uniformity of the patterning of the cathode layer 310 and the display effect of the display panel 10. In other words, the light shielding layer 400 provided in the embodiment of the present invention can protect the light emitting element 300 while ensuring the uniform patterning of the cathode layer 310, so that the light emitting element 300 is not affected by the etching laser irradiated from the back of the display panel 10, thereby ensuring the integrity of the light emitting element 300 and its luminous performance, thereby more effectively improving the display effect of the display panel 10.

[0075] Furthermore, the light shielding layer 400 for shielding the light emitting element 300 and the first supporting column 231 may be an integrated film layer, as shown in FIG. Fig.11 As shown, the light shielding layer 400 used to shield the light emitting element 300 and the first support column 231 can be a non-integrated film layer. That is, the light shielding layer 400 can be arranged in a variety of ways, and the embodiment of the present invention does not specifically limit this.

[0076] Fig.12 yes Figure 5 Another schematic diagram of the cross-sectional structure along the section line D-D' is shown in FIG. Fig.13 yes Figure 5 Another cross-sectional structure diagram along the section line D-D', refer to Figure 7 , Fig.12 and Fig.13 As shown, the display panel 10 also includes a light-shielding layer 400, which includes a first light-shielding layer 410 and a second light-shielding layer 420. Along a direction perpendicular to the base substrate 210, a projection of the first light-shielding layer 410 on the base substrate 210 overlaps with a projection of the light-emitting element 300 on the base substrate 210, and a projection of the second light-shielding layer 420 on the base substrate 210 overlaps with a projection of the first support column 231 on the base substrate 210.

[0077] Specifically, refer to Figure 7 , Fig.12 and Fig.13As shown, the light shielding layer 400 includes a first light shielding layer 410 and a second light shielding layer 420, wherein the first light shielding layer 410 is used to shield the laser light from being transmitted to the light emitting element 300 to prevent the light emitting element 300 from being irradiated by the laser, which can protect the structure of the light emitting element 300 from being damaged and affecting the light emission, and can ensure the service life of the light emitting element 300. The second light shielding layer 420 is used to shield the laser light from being transmitted to the first support column 231 to prevent the laser from passing through the first support column 231, causing changes in the transmission path and transmission energy, affecting the etching effect of the cathode layer 310, and thereby ensuring the stability of the patterning of the cathode layer 310.

[0078] Exemplary, reference Figure 7 As shown, the first light shielding layer 410 and the second light shielding layer 420 can be arranged in the same layer, that is, the preparation process of the light shielding layer 400 is reduced, and the first light shielding layer 410 and the second light shielding layer 420 can be prepared by the same material and the same process, thereby reducing the process cost of preparing the display panel 10. Furthermore, the first light shielding layer 410 and the second light shielding layer 420 can be tightly fitted, or a certain gap can be left, thereby increasing the light transmittance of the display panel 10 in the first display area 110, wherein the distance between the first light shielding layer 410 and the second light shielding layer 420 depends on the setting position of the first support column 231, and the embodiment of the present invention does not specifically limit this. Further, refer to Fig.12 and Fig.13 As shown, the first light-shielding layer 410 and the second light-shielding layer 420 can be set in different film layers in the display panel 10, that is, different film layers in the display panel 10 can be reused as the light-shielding layer 400, reducing the preparation process of the display panel 10. The embodiment of the present invention does not make specific limitations on this.

[0079] Continue to refer Figure 7 , Fig.12 and Fig.13 As shown, the display panel 10 includes a driving circuit layer 500 , and the driving circuit layer 500 includes a plurality of metal wirings, and some of the metal wirings are reused as a light shielding layer 400 .

[0080] Exemplary, reference Figure 7 , Fig.12 and Fig.13 As shown, the display panel 10 includes a driving circuit layer 500, which is located on one side of the substrate 210. Specifically, the driving circuit layer 500 includes multiple insulating layers, metal layers and metal traces in a stacked design, such as a buffer layer 510, a gate insulating layer 520, an active layer 530, an intermetallic insulating layer 540, a gate layer 550, a capacitor plate layer 560, an interlayer insulating layer 570, a source-drain layer 580 and an insulating layer 590. Specifically, the specific implementation of the film layer in the display panel 10 can be set by those skilled in the art according to actual conditions, and is not limited here.

[0081] Furthermore, the light shielding layer 400 in the display panel 10 is arranged in a flexible position and can be independently arranged in the display panel 10. Among them, the metal material can absorb and / or reflect light, that is, the light shielding layer 400 of the metal material has a better light shielding effect. At the same time, when the driving circuit layer 500 includes a plurality of metal traces and the light shielding layer 400 is prepared with a metal material, the driving circuit layer 500 including the plurality of metal traces can be reused in the light shielding layer 400, which simplifies the preparation process and saves the preparation cost, and can realize the thin design of the display panel 10.

[0082] Fig.14 yes Figure 4 Another enlarged schematic diagram of the C area, see Figure 4 and Fig.14 As shown, at least two first support columns 231 surround the light-emitting layers 321 of the light-emitting elements 300 with different light-emitting colors.

[0083] Specifically, the light-emitting element 300 realizes different color light-emitting displays based on the light-emitting layers 321 of different colors. For example, when the light-emitting element 300 includes a red light-emitting layer 321R, red light display is performed; when the light-emitting element 300 includes a green light-emitting layer 321G, green light display is performed; when the light-emitting element 300 includes a blue light-emitting layer 321B, blue light display is performed, thereby realizing color display of the display panel 10.

[0084] Furthermore, in the first display area 110, the first support column 231 is arranged around the light emitting element 300 to avoid affecting the transmission of the laser when the cathode layer is patterned, thereby ensuring the stability of the cathode layer patterning and further ensuring the display effect of the display panel 10. Fig.14 As shown, in the first display area 110, two first sub-support columns 231 are used as an example to illustrate that the two first sub-support columns 231 surround the light-emitting elements 300 of different colors, breaking the regular arrangement around the light-emitting elements 300 of the same light-emitting color, ensuring that the light-emitting elements 300 of different colors are arranged in a balanced manner as a whole, that is, the effects on the light-emitting elements 300 of different colors are balanced, thereby ensuring the display uniformity of the display panel 10. For example, in Fig.14 In the embodiment, the two first sub-support columns 231 respectively surround the light emitting element 300 emitting green light and the light emitting element 300 emitting red light, which is not specifically limited in the embodiment of the present invention.

[0085] Fig.15 yes Figure 5 Another schematic diagram of the cross-sectional structure along the section line D-D' is shown in FIG. Fig.16 yes Figure 5 Another cross-sectional structure diagram along the section line D-D', refer to Figure 5 , Fig.15 and Fig.16 As shown, the support pillar 230 includes scattering particles doped inside the support pillar 230 .

[0086] Specifically, refer to Fig.15 and Fig.16 As shown, scattering particles are arranged inside the support column 230, and the scattering particles can realize impedance to the laser light, so as to avoid that the cathode layer 310 corresponding to the support column 230 is etched in the second direction h, that is, the heat dissipation particles inside the support column 230 play a role equivalent to the light-shielding layer 400 arranged in the display panel 10, which can reduce the setting area of ​​the light-shielding layer 400 and reduce the process cost of setting the display panel 10.

[0087] Exemplary, reference Fig.15 and Fig.16 As shown, scattering particles are arranged inside the first support column 231 in the first display area 110 to ensure that the first support column 231 has a light shielding function while having a supporting function, thereby avoiding the first support column 231 affecting the patterning of the cathode layer 310 when the cathode layer 310 is patterned, thereby ensuring the display effect of the display panel 10.

[0088] Fig.17 yes Figure 4 Another enlarged schematic diagram of the C area in the middle, Fig.18 yes Fig.17 A schematic diagram of a cross-sectional structure along the section line E-E', Fig.19 yes Figure 4 Another enlarged schematic diagram of the C area in the middle, Fig. 20 yes Figure 4 Another enlarged schematic diagram of the C area, see Figures 17 to 20 As shown, the support column 230 also includes a sub-support column 232, and the vertical projection of the sub-support column 232 on the base substrate 210 includes at least one strip pattern 233, and the hollow portion 310A of the cathode layer 310 includes at least one connecting portion 310A1, and the strip pattern 233 is located within the vertical projection of the connecting portion 310A1 on the base substrate 210.

[0089] Specifically, refer to Fig.17 and Fig.18 As shown, there is at least one unetched area of ​​the cathode layer 310 between at least two different pixel openings 221, and there is a connecting portion 310A1 in the cathode layer 310 between different pixel openings 221 to connect different pixel openings 221. Specifically, when the cathode layer 310 is patterned and etched, there is a hollow area 310A, and the connecting portion 310A1 exists between the hollow areas 310A.

[0090] Furthermore, the support column 230 includes a sub-support column 232, which can be located between two pixel openings 221. To prevent the sub-support column 232 from affecting laser transmission and thus affecting the preparation of the hollow area 310A of the cathode layer 310, the sub-support column 232 is arranged in an area that is not laser etched, that is, the sub-support column 232 is arranged in an area that overlaps with the vertical projection of the connecting portion 310A1 on the base substrate 210, that is, the strip pattern 233 projected by the sub-support column 232 on the base substrate 210 overlaps with the vertical projection of the connecting portion 310A1 on the base substrate 210. On the one hand, the sub-support column 232 not only supports the display panel 10, but also ensures the uniformity of the overall thickness of the display panel 10. At the same time, it is ensured that the pixel openings 221 are connected through the connecting portion 310A1, that is, the cathode 311 of the light-emitting element 300 needs to be connected, and the sub-support column 232 is arranged below the connected cathode 311, that is, the connecting portion 310A1. On the other hand, it ensures the balance of the display light emission of the display panel 10, and on the other hand, it also avoids the sub-support column 232 being located at a position where laser scanning is required to form a hollow area 310A, thereby affecting the patterned preparation of the cathode layer 310, thereby improving the display effect of the display panel 10.

[0091] For further reference, Figures 17 to 20 There may also be scattering particles inside the sub-support column 232, and the scattering particles can realize impedance to the laser light, so as to prevent the cathode layer 310 corresponding to the support column 230 from being etched along the second direction h, that is, the heat dissipation particles inside the support column 230 are equivalent to the light shielding layer 400 set in the display panel 10, which can reduce the setting area of ​​the light shielding layer 400 and reduce the process cost of setting the display panel 10. Further, refer to Fig.17 , Fig.19 and Fig. 20 The sub-support pillars 232 may be arranged in various ways, that is, the strip-shaped patterns 233 perpendicular to the base substrate 210 may be arranged in various ways. The embodiment of the present invention does not specifically limit the arrangement shape of the sub-support pillars 232.

[0092] Continue to refer Figure 4 As shown, the display area 100 further includes a second display area 120, and the first display area 110 is multiplexed as a light sensing element setting area.

[0093] Specifically, the display area 100 includes a first display area 110 and a second display area 120, and the second display area 120 is used to realize the main display function of the display panel 10. The first display area 110 has the functions of display and light transmission, that is, it can realize the display and light-emitting function of the display panel 10, and can also realize the acquisition of external light, that is, a photosensitive element can be set in the first display area 110 and on the backlight side of the display panel 10 to acquire the light transmitted in the light-transmitting area, that is, the first display area 110 has a higher transmittance to external light, and the first display area 110 can be reused as a photosensitive element setting area. For example, a camera, a fingerprint recognition structure, or other devices integrated with a light sensor can be set below the first display area 110, that is, the first display area 110 can realize the function of light-emitting display, and can also realize the function of optical signal transmission, such as taking pictures, biometric recognition, and the like. Through the first display area 110 and the second display area 120, it is convenient to realize the full-screen display effect of the display panel 10.

[0094] Fig.21 yes Figure 4 A schematic diagram of a cross-sectional structure along the section line F-F', refer to Figure 4 and Fig.21 As shown, the second display area 120 includes a second support column 240 ; the projection area of ​​the first support column 231 on the base substrate 210 is smaller than the projection area of ​​the second support column 240 on the base substrate 210 .

[0095] Among them, reference Fig.21 As shown, the second display area 120 includes a second support column 240, and the display panel 10 realizes the overall support function of the display panel 10 through the first support column 231 and the second support column 240, thereby ensuring the normal use of the display panel 10. Furthermore, the second display area 120 does not need to obtain external light, that is, the projection area of ​​the second support column 240 on the base substrate 210 may not be limited, while the first display area 110 needs to obtain external light, that is, the projection area of ​​the first support column 231 on the base substrate 210 is not easy to be too large, thereby improving the light transmittance of the first display area 110. The projection area of ​​the first support column 231 on the base substrate 210 can be smaller than the projection area of ​​the second support column 240 on the base substrate 210, thereby ensuring the overall support effect of the display panel 10 and improving the light transmittance of the first display area 110.

[0096] Exemplary, reference Fig.21As shown, in the first direction X, the projected size of the first support pillar 231 on the substrate 210 is n2, and in the first direction X, the projected size of the second support pillar 240 on the substrate 210 is n1, that is, n1 is greater than n2. While achieving the support effect of the display panel 10, the light transmittance of the display panel 10 is ensured. The specific values of the projected size are not limited in the embodiments of the present invention.

[0097] Continue to refer to Fig.21 As shown, in the first direction X, the minimum distance between the first support pillar 231 and the adjacent light-emitting element 300 is d1, and the minimum distance between the second support pillar 240 and the adjacent light-emitting element 300 is d2, and d1 < d2.

[0098] Among them, refer to Fig.21 As shown, in the first display area 110, the cathode layer 310 is patterned to form a hollow area 310A, that is, the first support pillar 231 can be attached to the adjacent light-emitting element 300, thereby reducing the influence of the first support pillar 231 on the patterning etching of the cathode layer 310 and ensuring the display effect of the display panel 10. In the second display area 120, there is no need to perform a hollow design on the cathode layer 310, that is, the setting position of the second support pillar 240 is less restricted. To ensure the support effect of the second support pillar 240, the second support pillar 240 can be set between two adjacent light-emitting elements 300, that is, the distances from the two adjacent light-emitting elements 300 are balanced. Therefore, the distance between the first support pillar 231 and the adjacent light-emitting element 300 is less than the distance between the second support pillar 240 and the adjacent light-emitting element 300, achieving the support effect of the display panel 10 while ensuring the display effect of the display panel 10.

[0099] Exemplarily, refer to Fig.21 As shown, in the first direction X, the minimum distance between the first support pillar 231 and the adjacent light-emitting element 300 is d1. Among them, the minimum distance may refer to the distance between the center of the first support pillar 231 and the center of the light-emitting element 300. The embodiments of the present invention are only described herein and are not specifically limited. The minimum distance between the second support pillar 240 and the adjacent light-emitting element 300 is d2, and d1 < d2, achieving the support effect of the display panel 10 while ensuring the display effect of the display panel 10.

[0100] Based on the same inventive concept, the embodiments of the present invention also provide a method for manufacturing a display panel. Fig. 22 It is a schematic flowchart of a method for manufacturing a display panel provided by the embodiments of the invention; as Fig. 22 shown, the method for manufacturing a display panel provided by the embodiments of the present invention specifically includes:

[0101] S110. Provide a substrate.

[0102] Exemplarily, the provided substrate may be a rigid substrate, such as glass, etc. The embodiment of the present invention does not specifically limit the material of the substrate.

[0103] S120, forming a pixel defining layer, a support column and a plurality of light-emitting elements on one side of the base substrate, wherein the light-emitting elements include an anode, a light-emitting layer and a cathode stacked in sequence in a direction away from the base substrate.

[0104] The display panel includes structures for realizing the display function, such as a substrate, a pixel defining layer, and a light-emitting element. Specifically, the pixel opening on the pixel defining layer is used to define the opening size of the light-emitting element. The light-emitting element drives the light-emitting element to display light through a pixel driving circuit located on the substrate in the display panel. The pixel driving circuit may include at least one thin film transistor. The specific implementation of the pixel driving circuit can be set by those skilled in the art according to actual conditions and is not limited here.

[0105] Furthermore, the light-emitting element includes an anode, a light-emitting layer and a cathode, and the cathode and the cathode layer are arranged in the same layer. Specifically, the light-emitting layer also includes a hole injection layer, a hole transport layer, an electron blocking layer, an electron injection layer, an electron transport layer and a hole blocking layer, etc. The embodiment of the present invention does not limit the specific film layer setting, and those skilled in the art can set it according to actual conditions. The display and light emission of the light-emitting element are realized by setting the anode, the light-emitting layer and the cathode. Specifically, when the electrons and holes generated between the cathode and the anode meet in the light-emitting layer, light will be emitted, realizing the display light emission of the display panel.

[0106] S130, irradiating the base substrate with laser to form a cathode layer including a hollow portion in the first display area.

[0107] Exemplarily, the display area of ​​the display panel includes a first display area, and the first display area has a higher transmittance to external light. Then the area where the first display area is located can be used to set optical functional elements. For example, a camera, a fingerprint recognition structure, and other devices integrated with optical sensors can be set below the first display area. In addition to being able to realize the function of luminous display, the first display area can also realize the function of optical signal transmission, such as taking pictures, biometric recognition, and at least one of the functions. That is, while realizing the display function, the first display area can also transmit external light, thereby realizing the functions of shooting or user face unlocking, etc. The embodiment of the present invention does not specifically limit the function of the first display area.

[0108] Among them, the cathode layer is usually made of magnesium silver material, which has a significant reflection effect on light and a poor transmission effect on light. Therefore, the cathode layer in the first display area is set to include a hollow area and a non-hollow area, which can significantly improve the transmission effect of the first display area on light and reduce the reflection effect of the first display area on light. Specifically, the cathode can be patterned and etched by laser to realize the hollow area and the light-transmitting area of ​​the cathode, and realize the patterned cathode layer, that is, the hollow part of the cathode layer. Its hollow area overlaps with the light-transmitting area to ensure that the external light is transmitted to the light-transmitting area through the hollow area, which is convenient for realizing functions such as shooting of the display panel or user face unlocking. Specifically, the laser source emits laser from the backlight side of the display panel to the film layer that needs to be partially etched, that is, the laser is emitted from the side of the substrate away from the array layer to the film layer that needs to be partially etched. Furthermore, the laser light is incident on the backlight side of the substrate substrate to ensure that the impurities generated after laser cutting are removed in time to avoid the impurities generated by laser cutting affecting the stability of the display panel.

[0109] S140. Along the direction perpendicular to the display panel, the projection of the support column on the base substrate does not overlap with the projection of the hollow portion on the base substrate; and the vertical projection of the support column on the base substrate at least partially surrounds the vertical projection of the light-emitting layer on the base substrate.

[0110] The display panel includes support columns, and at least one first support column is included in the first display area for supporting the display panel in the first display area. The embodiment of the present invention does not impose a specific restriction on the number of first support columns. In order to avoid the first support column having a significant impact on laser transmission when designing the cathode layer pattern, the distances between the first support column and two adjacent pixel openings are different, which can break the regular setting of the first support column in the first display area and weaken the impact of the first support column on the cathode layer pattern design. In addition, the setting of the first support column off-center can improve the light transmission effect between the pixel openings and ensure the flatness of the film layer between the pixel openings.

[0111] Furthermore, the light-emitting element of the display panel includes an anode, a light-emitting layer and a cathode stacked in sequence in a direction away from the base substrate. In order to ensure the normal light emission of the light-emitting element, the cathode of the light-emitting element cannot be removed. At the same time, based on preventing the process error existing in the preparation process of the light-emitting element from affecting the light emission of the light-emitting element, or based on the cathode being designed as a whole surface to ensure the electrical connection between different light-emitting elements, that is, the size of the cathode is larger than the size of the pixel opening, and the redundant area of ​​the cathode is necessarily set. Therefore, when the setting position of the first support column is close to the adjacent pixel opening, the first support column is set in the redundant area of ​​the cathode. In other words, along the direction perpendicular to the display panel, the first support column can be located within the projection range of the cathode on the base substrate, that is, the cathode layer corresponding to the first support column is a redundant area reserved for the cathode when the light-emitting element is prepared. The cathode is to be retained, and the cathode layer at the pixel opening is not designed with a hollow area. In this embodiment, the position of the first support column is optimized so that it does not appear in the area between the pixel openings that needs to be laser scanned, thereby avoiding the influence of the first support column on the laser transmission path from the source, making the film layer structure in the laser scanning area uniform, and further reducing the energy difference generated when the laser passes through different film layer structures, thereby achieving uniform patterning of the cathode layer and ensuring the display effect of the display panel.

[0112] In summary, the method for preparing a display panel provided by an embodiment of the present invention, by setting the first support column in the support column at a position with different distances between the pixel openings on both adjacent sides, can avoid patterning defects caused by uneven laser power in the first display area when the cathode layer is subsequently patterned by laser, thereby ensuring the light transmittance of the display panel in the first display area, and further improving the display effect of the display panel.

[0113] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Fig.23 is a schematic diagram of the structure of a display device provided by an embodiment of the present invention, such as Fig.23 As shown, the display device 1 includes the display panel 10 described in any of the above embodiments. Therefore, the display device 1 provided in the embodiment of the present invention has the corresponding beneficial effects in the above embodiments, which will not be repeated here. Exemplarily, the display device 1 can be an electronic device such as a mobile phone, a computer, a smart wearable device (for example, a smart watch), and a vehicle-mounted display device, which is not limited in the embodiment of the present invention.

[0114] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection 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, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: The display panel includes a display area, wherein the display area includes a first display area, and the display panel includes: substrate substrate; A pixel defining layer, located on one side of the base substrate, the pixel defining layer comprising a plurality of pixel openings, wherein light emitting elements are disposed in the pixel openings; A plurality of support pillars are located on a side of the pixel defining layer away from the substrate; In the first display area, the support columns include at least one first support column, and along a direction parallel to the plane where the base substrate is located, the distances between the first support column and the pixel openings on two adjacent sides thereof are different; The cathode layer of the light emitting element includes a hollow portion, the hollow portion is located in the first display area, and along a direction perpendicular to the display panel, a projection of the support column on the base substrate does not overlap with a projection of the hollow portion on the base substrate.

2. The display panel according to claim 1, characterized in that: Along a first direction, a distance from a side of the first supporting column close to the light-emitting element to the pixel opening is 0-5 micrometers; wherein the first direction is a direction parallel to the display panel.

3. The display panel according to claim 1, characterized in that: The light-emitting element includes an anode, a light-emitting layer, and a cathode stacked in sequence along a direction away from the base substrate; and, along a second direction, the projection of the anode on the base substrate overlaps with the projection of the first supporting column on the base substrate, wherein the second direction is a direction perpendicular to the display panel.

4. The display panel according to claim 1, characterized in that: The display panel further includes a shading layer, which is located on a side of the light emitting element away from the supporting column. Along a direction perpendicular to the base substrate, a projection of the shading layer on the base substrate overlaps with a projection of the first supporting column on the base substrate.

5. The display panel according to claim 1, characterized in that: The projection shape of the first support column on the base substrate is a ring, a ring including at least one opening, or a plurality of block-shaped patterns located on the ring; and the projection of at least part of the pixel openings on the base substrate is located within the ring; The display panel further includes a light shielding layer, and a projection shape of the light shielding layer on the base substrate is the same as a projection shape of the first supporting pillar on the base substrate.

6. The display panel according to claim 1, characterized in that: The display panel also includes a shading layer, which is located on the side of the light-emitting element away from the supporting column. Along a direction perpendicular to the base substrate, the projection of the shading layer on the base substrate overlaps with the projection of the light-emitting element and the first supporting column on the base substrate.

7. The display panel according to claim 1, characterized in that: The display panel also includes a shading layer, which includes a first shading layer and a second shading layer. Along a direction perpendicular to the base substrate, a projection of the first shading layer on the base substrate overlaps with a projection of the light-emitting element on the base substrate, and a projection of the second shading layer on the base substrate overlaps with a projection of the first supporting column on the base substrate.

8. The display panel according to claim 4, characterized in that: The display panel includes a driving circuit layer, the driving circuit layer includes a plurality of metal wirings, and some of the metal wirings are reused as the light shielding layer.

9. The display panel according to claim 1, characterized in that: At least two of the first supporting columns surround the light-emitting layers of light-emitting elements with different light-emitting colors.

10. The display panel according to claim 1, characterized in that: The support pillars include scattering particles doped inside the support pillars.

11. The display panel according to claim 10, characterized in that: The support column also includes a sub-support column, and the sub-support column includes at least one strip-shaped pattern in the vertical projection of the base substrate. The hollow portion of the cathode layer includes at least one connecting portion, and the strip-shaped pattern is located within the vertical projection of the connecting portion on the base substrate.

12. The display panel according to claim 1, characterized in that: The display area also includes a second display area, and the first display area is multiplexed as a light sensing element setting area.

13. The display panel according to claim 12, characterized in that: The second display area includes a second support column; A projection area of ​​the first supporting column on the base substrate is smaller than a projection area of ​​the second supporting column on the base substrate.

14. The display panel according to claim 13, characterized in that: In a direction parallel to the plane where the substrate is located, the minimum distance between the first support column and the adjacent light emitting element is d1, and the minimum distance between the second support column and the adjacent light emitting element is d2, d1 <d2。 15. A method for preparing a display panel, characterized in that: include: providing a substrate base plate; A pixel defining layer, a support column and a plurality of light-emitting elements are formed on one side of the base substrate, wherein the light-emitting elements include an anode, a light-emitting layer and a cathode stacked in sequence in a direction away from the base substrate; Irradiating the base substrate with laser light to form a cathode layer including a hollow portion in the first display area; Along the direction perpendicular to the display panel, the projection of the support column on the base substrate does not overlap with the projection of the hollow portion on the base substrate; and the vertical projection of the support column on the base substrate at least partially surrounds the vertical projection of the light-emitting layer on the base substrate.

16. A display device, characterized in that: The invention comprises the display panel according to any one of claims 1 to 14.

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