Micro light-emitting element display panel, manufacturing method and display device

Abstract

The invention relates to the technical field of display panels, and discloses a micro light-emitting element display panel, a manufacturing method and a display device. The micro light-emitting element display panel comprises a substrate, a plurality of micro light-emitting elements, a black filling layer and a functional layer, wherein the plurality of micro light-emitting elements are arranged on one side of the substrate at intervals; the black filling layer is located between the adjacent micro light-emitting elements and located on the side, facing the light-emitting face, of the substrate. The functional layer is at least partially arranged between the micro light-emitting element and the black filling layer; wherein the absolute value of the difference between the surface, close to the black filling layer, of the functional layer and the surface tension of the black filling layer is smaller than the difference between the side wall of the micro light-emitting element and the surface tension of the black filling layer. In this way, the situation that the liquid black filler climbs to the upper surface of the micro light-emitting element due to the capillarity can be reduced, and the display effect of the micro light-emitting element display panel is improved.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and in particular to a micro-luminescent element display panel, a manufacturing method and a display device. Background Art

[0002] Due to the development needs of the display panel field, the micro-luminescent element display panel is required to achieve ultra-high contrast, so the micro-luminescent display panel production process needs to be processed in a black state. The black state processing includes filling the gaps with black ink using inkjet printing. The black ink will gather toward the micro-luminescent element due to surface tension, and will climb to the upper surface of the micro-luminescent element due to capillary phenomena, affecting the display effect.

[0003] Application Contents

[0004] In view of this, the main technical problem to be solved by the present application is to provide a micro-luminescent element display panel, a manufacturing method and a display device to improve the display effect of the micro-luminescent element display panel.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a micro-luminescent element display panel, which includes: a substrate, a plurality of micro-luminescent elements, a black filling layer, and a functional layer, wherein the plurality of micro-luminescent elements are arranged at intervals on one side of the substrate; the black filling layer is located between adjacent micro-luminescent elements and on the side of the substrate facing the light emitting surface; the functional layer is at least partially arranged between the micro-luminescent elements and the black filling layer; wherein the absolute value of the difference in surface tension between the surface of the functional layer close to the black filling layer and the black filling layer is smaller than the difference in surface tension between the side wall of the micro-luminescent element and the black filling layer.

[0006] The absolute value of the difference between the surface tension of the functional layer close to the black filling layer and the surface tension of the black filling layer is less than or equal to 20% of the surface tension of the black filling layer.

[0007] The surface tension of the surface of the functional layer close to the black filling layer is equal to or within an error range with the surface tension of the black filling layer.

[0008] The functional layer is located on the peripheral side of the micro-luminescent element.

[0009] Part of the functional layer is located on the peripheral side of the micro-luminescent element, and the other part is located between the black filling layer and the substrate.

[0010] The functional layer covers the side walls of the micro-luminescent element and the ends of the micro-luminescent element that are away from the substrate.

[0011] The functional layer also covers the substrate between adjacent micro-luminescent elements.

[0012] Wherein, the light transmittance of the functional layer is greater than or equal to 99%.

[0013] The functional layer includes a surface layer, which is close to the black filling layer; and a transition layer, which is located on the side of the surface layer away from the black filling layer.

[0014] Wherein, the transition layer includes a light diffusion layer.

[0015] The micro-luminescent element display panel further comprises an encapsulation layer, which is arranged on a side of the micro-luminescent element away from the substrate and is used to encapsulate the micro-luminescent element.

[0016] The present application also includes a second technical solution, a method for manufacturing a micro-luminescent element display panel, comprising:

[0017] Providing micro-light emitting elements distributed at intervals on the substrate;

[0018] Forming a functional layer on the side wall of the micro-light-emitting element so that the functional layer at least partially covers the side wall of the micro-light-emitting element;

[0019] Liquid black filler is placed between adjacent micro-luminescent elements, and the height of the liquid black filler is lower than the functional layer covering the side walls of the micro-luminescent elements, and the liquid black filler is solidified to form a black filling layer; wherein the absolute value of the difference in surface tension between the surface of the functional layer close to the black filling layer and the black filling layer is smaller than the difference in surface tension between the side walls of the micro-luminescent elements and the black filling layer.

[0020] The present application also includes a third technical solution, a display device, including a driving circuit and the above-mentioned micro-luminescent element display panel, wherein the driving circuit is used to drive the micro-luminescent display panel to emit light.

[0021] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a micro-luminescent element display panel. The micro-luminescent element display panel is provided with a functional layer, and the functional layer is at least partially provided between the micro-luminescent element and the black filling layer; the absolute value of the difference between the surface tension of the functional layer close to the black filling layer and the surface tension of the black filling layer is smaller than the difference between the surface tension of the side wall of the micro-luminescent element and the black filling layer, so that the surface contacted by the black filling layer is closer to the surface tension of the black filling layer, that is, the surface tension of the functional layer is similar to the surface tension of the black filling layer, which can reduce the liquid black filler from climbing to the upper surface of the micro-luminescent element due to capillary phenomenon, and improve the display effect of the micro-luminescent element display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the first embodiment of the micro-luminescent element display panel of the present application;

[0023] Figure 2It is a schematic structural diagram of the first embodiment of the micro-luminescent element display panel of the present application;

[0024] Figure 3 is a schematic structural diagram of a second embodiment of a micro-luminescent element display panel of the present application;

[0025] Figure 4 is a schematic structural diagram of a third embodiment of a micro-luminescent element display panel of the present application;

[0026] Figure 5 is a schematic structural diagram of a fourth embodiment of a micro-luminescent element display panel of the present application;

[0027] Figure 6 is a schematic structural diagram of a fifth embodiment of a micro-luminescent element display panel of the present application;

[0028] Figure 7 is a schematic structural diagram of a sixth embodiment of a micro-luminescent element display panel of the present application;

[0029] Figure 8 is a schematic structural diagram of a seventh embodiment of a micro-luminescent element display panel of the present application;

[0030] Fig. 9 is a schematic structural diagram of an eighth embodiment of a micro-luminescent element display panel of the present application;

[0031] Fig.10 It is a schematic diagram of the process of manufacturing the micro-luminescent element display panel of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0033] In order to solve the technical problem in the prior art that the liquid black filler of the micro-luminescent element display panel 100 climbs onto the surface of the micro-luminescent element 120 due to capillary phenomenon and affects the display effect, an embodiment of the present application provides a micro-luminescent element display panel 100, which includes: a substrate 110, a plurality of micro-luminescent elements 120, a black filling layer 130, and a functional layer 140, wherein the plurality of micro-luminescent elements 120 are arranged at intervals on one side of the substrate 110; the black filling layer 130 is located on the side of the functional layer 140 away from the substrate 110, and is located between adjacent micro-luminescent elements 120; the functional layer 140 is at least partially arranged between the micro-luminescent element 120 and the black filling layer 130; wherein the absolute value of the difference in surface tension between the surface of the functional layer 140 close to the black filling layer 130 and the black filling layer 130 is smaller than the difference in surface tension between the side wall of the micro-luminescent element 120 and the black filling layer 130. The absolute value of the difference between the surface tension of the functional layer 140 close to the black filling layer 130 and the surface tension of the black filling layer 130 is smaller than the difference between the surface tension of the side wall of the micro-luminescent element 120 and the black filling layer 130, so that the surface contacted by the black filling layer 130 is closer to its surface tension, that is, the surface tension of the functional layer 140 is similar to the surface tension of the black filling layer 130, which can reduce the liquid black filler from climbing to the upper surface of the micro-luminescent element 120 due to capillary phenomenon, and improve the display effect of the micro-luminescent element display panel 100. The following is a detailed description.

[0034] In the embodiments of the present application, Figure 3 A functional layer 140 is disposed on the side wall of the micro-luminescent element 120 . The functional layer 140 is between the micro-luminescent element 120 and the black filling layer 130 . The height of the functional layer 140 is higher than that of the black filling layer 130 . The functional layer 140 can prevent the black filling layer 130 from contacting the micro-luminescent element 120 .

[0035] In one embodiment of the present application, the surface tension of the side wall of the micro-luminescent element 120 is in the range of 55-65mN / m; the surface tension of the black filling layer 130 is in the range of 20-30mN / m, and the material of the black filling layer 130 includes: acrylic or epoxy resin system; the surface tension of the functional layer 140 is in the range of 25-35mN / m, and the material of the functional layer 140 includes silicone or OCA optical glue, etc. Because the absolute value of the difference in surface tension between the surface of the functional layer 140 close to the black filling layer 130 and the black filling layer 130 is smaller than the difference in surface tension between the side wall of the micro-luminescent element 120 and the black filling layer 130, the functional layer 140 can reduce the absolute value of the difference in surface tension between the surface of the black filling layer 130 and the surface it contacts, thereby improving the problem of black filler aggregation to the micro-luminescent element 120 due to the large difference in surface tension between the surface of the black filling layer 130 and the surface it contacts, thereby affecting the display effect of the micro-luminescent element display panel 100. That is, the surface tension of the functional layer 140 of the micro-luminescent element display panel 100 of the embodiment of the present application is closer to the surface tension of the black filling layer 130, thereby reducing the liquid black filler from climbing to the upper surface of the micro-luminescent element 120 due to capillary phenomena, thereby improving the display effect of the micro-luminescent element display panel 100.

[0036] In other embodiments of the present application, see Figure 4 , the height of the functional layer 140 is flush with the height of the end of the micro-luminescent element 120 that is away from the substrate 110. The height of the functional layer 140 is flush with the height of the end of the micro-luminescent element 120 that is away from the substrate 110. On the one hand, it is convenient to set the functional layer 140, so that the functional layer 140 and the side wall of the micro-luminescent element 120 are attached more accurately. On the other hand, the larger the area of ​​the functional layer 140 and the higher the height, the greater the difficulty of the liquid black filler climbing to the upper surface of the micro-luminescent element 120, further reducing the liquid black filler climbing to the upper surface of the micro-luminescent element 120 due to capillary phenomenon, and improving the display effect of the micro-luminescent element display panel 100. In other embodiments, such as Figure 5 As shown, the height of the functional layer 140 may also be smaller than the height of the micro-luminescent element 120 .

[0037] In the embodiment of the present application, the absolute value of the difference between the surface tension of the surface of the functional layer 140 close to the black filling layer 130 and the surface tension of the black filling layer 130 is less than or equal to 20% of the surface tension of the black filling layer 130. In other embodiments, the absolute value of the difference between the surface tension of the surface of the functional layer 140 close to the black filling layer 130 and the surface tension of the black filling layer 130 is equal to 20%, 15%, 10%, 5% or 0 of the surface tension of the black filling layer 130. In the embodiment of the present application, the surface tension of the functional layer 140 may be greater than, equal to or less than the surface tension of the black filling layer 130. The surface tension of the surface of the functional layer 140 close to the black filling layer 130 is greater than or equal to 80% of the surface tension of the black filling layer 130, and less than or equal to 120% of the surface tension of the black filling layer 130.

[0038] In the embodiment of the present application, the surface tension of the surface of the functional layer 140 close to the black filling layer 130 is equal to the surface tension of the black filling layer 130. The surface tension of the surface of the functional layer 140 close to the black filling layer 130 is equal to the surface tension of the black filling layer 130, so that the liquid black filler is in a planar state when close to the functional layer 140, and the liquid black filler is in a stable state, which can greatly improve the problem of the liquid black filler climbing onto the upper surface of the micro-luminescent element 120.

[0039] In other embodiments of the present application, the surface tension of the surface of the functional layer 140 close to the black filling layer 130 is within the error range with the surface tension of the black filling layer 130. The error in the measurement and calculation of the surface tension will cause the surface tension of the black filling layer 130 and the surface tension of the functional layer 140 to be unable to be absolutely equal. The similarity between the surface tension of the black filling layer 130 and the surface tension of the functional layer 140 can make the liquid black filler approach a planar state when it is close to the functional layer 140, and the state of the liquid black filler is relatively stable.

[0040] In the embodiment of the present application, the functional layer 140 is located on the peripheral side of the micro-luminescent element 120. Figure 3 , a functional layer 140 is disposed on the peripheral side of the micro-luminescent element 120, and the black filling layer 130 is directly disposed on the substrate 110. In the embodiment of the present application, the functional layer 140 is disposed on the peripheral side of the micro-luminescent element 120 to reduce the absolute value of the difference in surface tension between the surface of the black filling layer 130 and the surface it contacts, thereby improving the problem that the black filler aggregates toward the micro-luminescent element 120 due to the large difference in surface tension between the surface of the black filling layer 130 and the surface it contacts, thereby affecting the display effect of the micro-luminescent element display panel 100. Arranging the functional layer 140 on the peripheral side of the micro-luminescent element 120 can reduce the amount of the functional layer 140 used and reduce production costs.

[0041] In other embodiments of the present application, Figure 5 , a part of the functional layer 140 is located on the peripheral side of the micro-luminescent element 120, and the other part is located between the black filling layer 130 and the substrate 110. The height of the functional layer 140 is higher than the black filling layer 130, and lower than the height of the end of the micro-luminescent element 120 away from the substrate 110. The functional layer 140 is arranged both on the peripheral side of the micro-luminescent element 120 and between the black filling layer 130 and the substrate 110, which has a stronger effect on the liquid black filler. The liquid black filler is completely in the functional layer 140, which reduces the contact with the substrate 110 with different or dissimilar surface tensions, reduces the risk of the liquid black filler contacting the micro-luminescent element 120, and increases the contact with the surface tension of the functional layer 140 with the same or similar surface tension as the liquid black filler, which can make the surface of the liquid black filler smoother and the liquid black filler more stable.

[0042] In other embodiments of the present application, see Figure 7 Part of the functional layer 140 is located around the micro-luminescent element 120, and the other part is located between the black filling layer 130 and the substrate 110. The height of the functional layer 140 can be flush with the end of the micro-luminescent element 120 away from the substrate 110. The risk of the liquid black filling agent contacting the micro-luminescent element 120 is further reduced.

[0043] In the embodiments of this application, see Figure 8 , the functional layer 140 covers the sidewalls of the micro-luminescent element 120 and the end of the micro-luminescent element 120 away from the substrate 110. Covering the end of the micro-luminescent element 120 away from the substrate 110 by the functional layer 140 can well protect the upper surface of the micro-luminescent element 120. When the liquid black filler contacts the upper surface of the micro-luminescent element 120 covered with the functional layer 140, the liquid black filler will slide down, which can effectively reduce the liquid black filler remaining on the upper surface of the micro-luminescent element 120, thereby improving the display effect of the micro-luminescent element display panel 100.

[0044] In other embodiments of the present application, see Figure 2, the functional layer 140 covers the sidewalls of the micro-luminescent element 120 and the ends of the micro-luminescent element 120 away from the substrate 110; the functional layer 140 also covers the substrate 110 between adjacent micro-luminescent elements 120. Covering the sidewalls of the micro-luminescent element 120, the ends of the micro-luminescent element 120 away from the substrate 110, and the substrate 110 between adjacent micro-luminescent elements 120 facilitates the integral formation of the functional layer 140 on one side of the substrate 110 and the micro-luminescent element 120, facilitates the manufacture of the functional layer 140, reduces the difficulty of manufacturing the functional layer 140, and improves the manufacturing efficiency of the display panel. In the embodiment of the present application, the functional layer 140 can be made by attaching, and the functional layer 140 is attached with one micro-light-emitting element 120 as a unit. The attached area is larger than the side wall of the micro-light-emitting element 120 or the side wall of the micro-light-emitting element 120, the end of the micro-light-emitting element 120 away from the substrate 110, or the side wall of the micro-light-emitting element 120, and the substrate 110 between adjacent micro-light-emitting elements 120. A large area can be attached at one time, reducing the number of attachments and reducing time costs. On the other hand, the larger area of ​​the functional layer 140 can wrap the micro-light-emitting element 120 to the greatest extent, isolating the micro-light-emitting element 120 from contact with the black filling layer 130.

[0045] In the embodiment of the present application, the light transmittance of the functional layer 140 is greater than or equal to 99%. Attaching the functional layer 140 to the surface of the micro-light-emitting element 120 will affect the light-emitting effect of the micro-light-emitting element 120. The light transmittance of the functional layer 140 is greater than or equal to 99%, which can effectively reduce the impact of the display effect caused by attaching the functional layer 140 to the surface of the micro-light-emitting element 120.

[0046] In the embodiment of the present application, the functional layer 140 includes a surface layer 141 and a transition layer 142. The surface layer 141 is close to the side of the black filling layer 130; the transition layer 142 is located on the side of the surface layer 141 away from the black filling layer 130; the absolute value of the difference between the surface tension of the surface layer 141 and the black filling layer 130 is less than the difference between the surface tension of the side wall of the micro-luminescent element 120 and the black filling layer 130. Adding the surface layer 141 can reduce the absolute value of the difference between the surface tension of the black filling layer 130 and the surface it contacts, and improve the black filler aggregation to the micro-luminescent element 120 caused by the large difference between the surface tension of the black filling layer 130 and the surface it contacts, which affects the display effect of the micro-luminescent element display panel 100. In other embodiments, the absolute value of the difference between the surface tension of the surface layer 141 and the surface tension of the black filling layer 130 is less than or equal to 20% of the surface tension of the black filling layer 130. In other embodiments, the surface tension of the surface layer 141 is equal to the surface tension of the black filling layer 130. The surface tension of the surface layer 141 is equal to the surface tension of the black filling layer 130, so that the liquid surface state of the liquid black filler is in a planar state when it is close to the functional layer 140, and the liquid black filler is in a stable state, which can greatly improve the problem of the liquid black filler climbing onto the upper surface of the micro-luminescent element 120. In other embodiments, the surface tension of the surface layer 141 is within the error range of the surface tension of the black filling layer 130. The surface tension of the black filling layer 130 is similar to the surface tension of the surface layer 141, so that the liquid surface state of the liquid black filler is close to a planar state when it is close to the functional layer 140, and the liquid black filler is in a relatively stable state.

[0047] In one embodiment of the present application, the transition layer 142 has adhesiveness and can fix the surface layer 141 to the sidewall of the micro-luminescent element 120 or the end of the micro-luminescent element 120 facing away from the substrate 110 or the substrate 110 between adjacent micro-luminescent elements 120 .

[0048] In other embodiments of the present application, see Figure 6 The functional layer 140 includes: a surface layer 141 and a transition layer 142. The surface layer 141 is close to the black filling layer 130; the transition layer 142 is located on the side of the surface layer 141 away from the black filling layer 130; the transition layer 142 includes a light diffusion layer 1421. The light diffusion layer 1421 is attached to the upper surface of the micro-luminescent element 120. The light diffusion layer 1421 can diffuse light, improve light and enhance the display effect of the display panel.

[0049] In other embodiments of the present application, see Figure 1The functional layer 140 can also be a single layer. The single-layer functional layer 140 has good adhesion on the side away from the black filling layer 130, so that the functional layer 140 can be firmly attached to the substrate 110 and the micro-luminescent element 120. The functional layer 140 is close to the side of the black filling layer 130. The absolute value of the difference between the surface tension of the functional layer 140 close to the black filling layer 130 and the surface tension of the black filling layer 130 is smaller than the difference between the side wall of the micro-luminescent element 120 and the black filling layer 130.

[0050] In the embodiments of this application, see Fig. 9 The micro-luminescent element display panel 100 further includes an encapsulation layer 220, which is disposed on the side of the micro-luminescent element 120 away from the substrate 110 and is used to encapsulate the micro-luminescent element 120. Encapsulation methods include film lamination, compression molding, and dispensing. Transparent encapsulation of the micro-luminescent element 120 can better protect the micro-luminescent element 120.

[0051] This application also includes a second technical solution, see Fig.10 , a method for manufacturing a micro-luminescent element display panel 100, comprising:

[0052] S11: providing micro-luminescent elements 120 distributed at intervals on the substrate 110;

[0053] In the embodiment of the present application, the micro-luminescent element 120 includes red micro-luminescent elements, green micro-luminescent elements, and blue micro-luminescent elements. The red micro-luminescent elements, green micro-luminescent elements, and blue micro-luminescent elements are arranged in a straight line or in a triangle.

[0054] S12: forming a functional layer 140 on the side wall of the micro-luminescent element 120 , so that the functional layer 140 at least partially covers the side wall of the micro-luminescent element 120 ;

[0055] In the embodiment of the present application, the functional layer 140 is located on the peripheral side of the micro-luminescent element 120. Figure 3 , a functional layer 140 is disposed on the peripheral side of the micro-luminescent element 120, and the black filling layer 130 is directly disposed on the substrate 110. The functional layer 140 is disposed on the peripheral side of the micro-luminescent element 120 to reduce the absolute value of the difference in surface tension between the surface of the black filling layer 130 and the surface it contacts, thereby improving the problem that the black filler aggregates toward the micro-luminescent element 120 due to the large difference in surface tension between the surface of the black filling layer 130 and the surface it contacts, thereby affecting the display effect of the micro-luminescent element display panel 100. The functional layer 140 is disposed on the peripheral side of the micro-luminescent element 120 to reduce the amount of the functional layer 140 used and reduce production costs.

[0056] In other embodiments of the present application, Figure 5, a part of the functional layer 140 is located on the peripheral side of the micro-luminescent element 120, and the other part is located between the black filling layer 130 and the substrate 110. The height of the functional layer 140 is higher than the black filling layer 130, and lower than the height of the end of the micro-luminescent element 120 away from the substrate 110. The functional layer 140 is arranged both on the peripheral side of the micro-luminescent element 120 and between the black filling layer 130 and the substrate 110, and the liquid black filler is more strongly wrapped. The liquid black filler is completely in the functional layer 140, which reduces the contact with the substrate 110 with different or dissimilar surface tensions, and increases the contact with the surface tension of the functional layer 140 with the same or similar surface tension as the liquid black filler, which can make the surface of the liquid black filler smoother and the liquid black filler more stable.

[0057] In other embodiments of the present application, see Figure 7 A portion of the functional layer 140 is located around the micro-luminescent element 120 , and another portion is located between the black filling layer 130 and the substrate 110 . The height of the functional layer 140 may be flush with the end of the micro-luminescent element 120 that is away from the substrate 110 .

[0058] In the embodiments of this application, see Figure 8 , the functional layer 140 covers the sidewalls of the micro-luminescent element 120 and the end of the micro-luminescent element 120 away from the substrate 110. Covering the end of the micro-luminescent element 120 away from the substrate 110 with the functional layer 140 can well protect the upper surface of the micro-luminescent element 120. When the liquid black filler contacts the upper surface of the micro-luminescent element 120 covered with the functional layer 140, the liquid black filler will slide down, which can effectively reduce the liquid black filler remaining on the upper surface of the micro-luminescent element 120, thereby improving the display effect of the micro-luminescent element display panel 100.

[0059] In other embodiments of the present application, see Figure 2 , the functional layer 140 covers the sidewalls of the micro-luminescent element 120 and the ends of the micro-luminescent element 120 that are away from the substrate 110; the functional layer 140 also covers the substrate 110 between adjacent micro-luminescent elements 120. Covering the sidewalls of the micro-luminescent element 120, the ends of the micro-luminescent element 120 that are away from the substrate 110, and the substrate 110 between adjacent micro-luminescent elements 120 facilitates the attachment of the functional layer 140. The functional layer 140 is attached with one micro-luminescent unit as a unit, so a larger area can be attached at one time, reducing the number of attachments and reducing time costs. On the other hand, the larger area of ​​the attached functional layer 140 can wrap the micro-luminescent element 120 to the greatest extent, isolating the micro-luminescent element 120 from contact with the black filling layer 130.

[0060] S13: Place liquid black filler between adjacent micro-luminescent elements 120, and make the height of the liquid black filler lower than the functional layer 140 covering the side walls of the micro-luminescent element 120, and solidify the liquid black filler to form a black filling layer 130; wherein the absolute value of the difference in surface tension between the surface of the functional layer 140 close to the black filling layer 130 and the black filling layer 130 is smaller than the difference in surface tension between the side walls of the micro-luminescent element 120 and the black filling layer 130.

[0061] Placing the liquid black filler between adjacent micro-luminescent elements 120 can make the micro-luminescent element display panel 100 have a higher contrast. The height of the liquid black filler is lower than the functional layer 140 covering the side wall of the micro-luminescent element 120 so that the liquid black filler does not contact the micro-luminescent element 120. The absolute value of the difference between the surface tension of the functional layer 140 close to the black filling layer 130 and the black filling layer 130 is smaller than the difference between the surface tension of the side wall of the micro-luminescent element 120 and the black filling layer 130. Adding the functional layer 140 can reduce the absolute value of the difference between the surface tension of the black filling layer 130 and the surface it contacts, thereby improving the black filler aggregation to the micro-luminescent element 120 caused by the large difference between the surface tension of the black filling layer 130 and the surface it contacts, thereby affecting the display effect of the micro-luminescent element display panel 100.

[0062] In other embodiments, after S13 , the step further includes manufacturing a packaging layer 220 , so that the packaging layer 220 covers the micro-light-emitting element 120 , thereby achieving the effect of packaging the micro-light-emitting element 120 .

[0063] The present application also includes a third technical solution, a display device 200, including a driving circuit 210 and the above-mentioned micro-luminescent element display panel 100, and the driving circuit 210 is used to drive the micro-luminescent display panel to emit light.

[0064] The display device 200 of the embodiment of the present application adopts the above-mentioned micro-luminescent element display panel 100, and the micro-luminescent element display panel 100 is provided with a functional layer 140, and the functional layer 140 is at least partially provided between the micro-luminescent element 120 and the black filling layer 130; so that the absolute value of the difference between the surface tension of the functional layer 140 close to the black filling layer 130 and the surface tension of the black filling layer 130 is smaller than the difference between the side wall of the micro-luminescent element 120 and the black filling layer 130, so that the surface contacted by the black filling layer 130 is closer to the surface tension of the black filling layer 130, that is, the surface tension of the functional layer 140 is similar to the surface tension of the black filling layer 130, which can reduce the liquid black filler from climbing to the upper surface of the micro-luminescent element 120 due to the capillary phenomenon, and improve the display effect of the micro-luminescent element display panel 100. So that the display device 200 can achieve a higher contrast.

[0065] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A micro-luminescent element display panel, characterized in that: include: substrate, A plurality of micro-light emitting elements, wherein the plurality of micro-light emitting elements are arranged at intervals on one side of the substrate; A black filling layer, located between adjacent micro-luminescent elements and located on a side of the substrate facing the light emitting surface; a functional layer, wherein the functional layer is at least partially disposed between the micro-luminescent element and the black filling layer; The absolute value of the difference between the surface tension of the functional layer close to the black filling layer and the surface of the black filling layer is smaller than the difference between the surface tension of the side wall of the micro-luminescent element and the black filling layer.

2. The micro-luminescent element display panel according to claim 1, characterized in that: An absolute value of a difference between a surface tension of the functional layer close to the black filling layer and a surface tension of the black filling layer is less than or equal to 20% of the surface tension of the black filling layer.

3. The micro-luminescent element display panel according to claim 1, characterized in that: The surface tension of the surface of the functional layer close to the black filling layer is equal to or within a tolerance range with the surface tension of the black filling layer.

4. The micro-luminescent element display panel according to claim 1, characterized in that: The functional layer is located on the peripheral side of the micro-luminescent element; or, A portion of the functional layer is located on the peripheral side of the micro-luminescent element, and another portion of the functional layer is located between the black filling layer and the substrate.

5. The micro-luminescent element display panel according to claim 1, characterized in that: The functional layer covers the sidewalls of the micro-luminescent element and the ends of the micro-luminescent element away from the substrate; Preferably, the functional layer also covers the substrate between adjacent micro-luminescent elements.

6. The micro-luminescent element display panel according to claim 5, characterized in that: The light transmittance of the functional layer is greater than or equal to 99%.

7. The micro-luminescent element display panel according to claim 1, characterized in that: The functional layer comprises: A surface layer, close to the black filling layer; A transition layer, the transition layer being located on a side of the surface layer away from the black filling layer; Preferably, the transition layer comprises a light diffusion layer.

8. The micro-luminescent element display panel according to claim 1, characterized in that: Also includes: The encapsulation layer is arranged on a side of the micro-luminescent element away from the substrate and is used to encapsulate the micro-luminescent element.

9. A method for manufacturing a micro-luminescent element display panel, characterized in that: include: Providing micro-light emitting elements distributed at intervals on the substrate; Making a functional layer on the side wall of the micro-luminescent element, so that the functional layer at least partially covers the side wall of the micro-luminescent element; A liquid black filler is placed between adjacent micro-luminescent elements so that the height of the liquid black filler is lower than the functional layer covering the side walls of the micro-luminescent elements, and the liquid black filler is cured to form a black filling layer; wherein the absolute value of the difference in surface tension between a surface of the functional layer close to the black filling layer and the black filling layer is smaller than the difference in surface tension between the side walls of the micro-luminescent elements and the black filling layer.

10. A display device, characterized in that: It comprises a driving circuit and the micro-luminescent element display panel according to any one of claims 1 to 8, wherein the driving circuit is used to drive the micro-luminescent element display panel to emit light.

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