A display panel and display device

Abstract

The present invention discloses a display panel and a display device, wherein the display panel includes a packaging cover plate, a sealing glue, a substrate and a light-emitting unit, the packaging cover plate is arranged opposite to the substrate, and the light-emitting unit is located on a side of the substrate close to the packaging cover plate; at least one of the packaging cover plate and the substrate is provided with an edge retaining wall, and the edge retaining wall at least partially surrounds the light-emitting unit; the packaging cover plate has a first face portion, and the substrate has a second face portion, the first face portion and the second face portion are arranged opposite to each other, one of the first face portion and the second face portion is provided with a groove, the groove and the light-emitting unit are staggered, and the edge retaining wall at least partially surrounds the groove; the sealing glue is filled between the packaging cover plate, the edge retaining wall and the substrate, and the sealing glue covers the light-emitting unit in the direction from the packaging cover plate to the substrate. The edge retaining wall forms a protective stopper in the circumferential direction, which can reduce the overflow of the sealing glue during the press-fitting process; the groove and the light-emitting unit are staggered, which can reduce the influence on the light while gathering bubbles, and can ensure the display effect.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a display panel and a display device. Background Art

[0002] Please refer to Figure 1 , Figure 1 The figure is a schematic diagram of the structure of an LED display panel in the prior art.

[0003] like Figure 1 As shown, in conventional designs, the LED display panel includes a package cover plate 01, a sealing glue 02, a substrate 03, and an LED module 04 mounted on the substrate 03. During the assembly process, a pressing process is required to reduce the distance between the package cover plate 01 and the substrate 03. In this way, the sealing glue 02 is easily overflowed, which seriously affects the assembly of the LED display panel. In particular, for a display device that needs to use multiple display panels for splicing, the overflow of the sealing glue will affect the splicing effect.

[0004] Therefore, how to provide a solution to better alleviate or overcome the overflow of the sealing glue during the lamination process is still a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0005] An object of the present invention is to provide a display panel and a display device, wherein the display panel can reduce the overflow of sealing glue during the press-fitting process and can reduce the influence on the light output to ensure the display effect.

[0006] In order to solve the above technical problems, the present invention provides a display panel, including a packaging cover plate, a sealing compound, a substrate and a light-emitting unit, wherein the packaging cover plate is arranged opposite to the substrate, and the light-emitting unit is located on a side of the substrate close to the packaging cover plate; at least one of the packaging cover plate and the substrate is provided with an edge retaining wall, and the edge retaining wall at least partially surrounds the light-emitting unit; the packaging cover plate has a first face portion, and the substrate has a second face portion, the first face portion and the second face portion are arranged opposite to each other, one of the first face portion and the second face portion is provided with a groove, the groove is staggered with the light-emitting unit, and the edge retaining wall at least partially surrounds the groove; the sealing compound is filled between the packaging cover plate, the edge retaining wall and the substrate, and the sealing compound covers the light-emitting unit in a direction from the packaging cover plate to the substrate.

[0007] With this structure, the edge retaining wall can form a protective stopper in the circumferential direction, which can reduce the overflow of the sealing glue during the press-fitting process of the package cover plate and the substrate. In addition, one of the first face and the second face is also provided with a groove, which can gather bubbles generated by the poor flow of the sealing glue caused by the provision of the edge retaining wall. The groove and the light-emitting unit are staggered, which can reduce the influence of the groove and the bubbles in the groove on the light emission of the light-emitting unit, which is conducive to ensuring the display effect of the display panel provided by the present invention.

[0008] Optionally, the edge retaining wall is configured on the packaging cover plate, and the edge retaining wall is in contact with the substrate, or the edge retaining wall is in contact with the substrate through the sealing glue.

[0009] Optionally, the edge retaining wall and the packaging cover plate are an integrated structure.

[0010] Optionally, the display panel includes a display area and a non-display area, the edge retaining wall is located in the non-display area, and the edge retaining wall at least partially surrounds the display area; the display panel also includes a middle retaining wall, the display area includes a light-emitting area and a non-light-emitting area, the light-emitting unit is located in the light-emitting area, and the middle retaining wall is located in the non-light-emitting area; the middle retaining wall is configured on at least one of the packaging cover plate and the substrate.

[0011] Optionally, the middle retaining wall is configured on the packaging cover plate, and the middle retaining wall and the packaging cover plate are an integrated structure.

[0012] Optionally, at least one of the middle retaining wall and the edge retaining wall is made of a non-light-transmitting material.

[0013] Optionally, the middle retaining wall and the edge retaining wall are connected or in contact with each other to enclose a circumferentially closed cavity; or, part of the middle retaining wall is connected or in contact with each other to enclose a circumferentially closed cavity; at least one light-emitting unit is provided in the area of ​​the cavity, and at least one groove is provided in the area of ​​the cavity on the first face portion and the second face portion.

[0014] Optionally, there are multiple middle retaining walls, each of which is spaced apart from another, and the middle retaining walls are spaced apart from the edge retaining walls.

[0015] Optionally, there are multiple light-emitting units, each of which is arranged at intervals, and the display panel is provided with one of the grooves or one of the middle retaining walls between any two adjacent light-emitting units; and / or, there are multiple grooves, each of which is arranged at intervals, and the display panel is provided with one of the light-emitting units or one of the middle retaining walls between any two adjacent grooves.

[0016] Optionally, the groove is arranged on the first surface, with the direction perpendicular to the plane of the substrate as the first direction, and the direction perpendicular to the first direction as the second direction, the minimum spacing between the side wall of the groove and the adjacent light-emitting unit in the second direction is L1, and the spacing between the light-emitting unit and the first surface in the first direction is L2, and L1≥L2.

[0017] Optionally, a shielding portion made of a non-light-transmitting material is further included, and the shielding portion at least covers the bottom wall of the groove in the first direction.

[0018] Optionally, the groove is arranged on the second surface, and a masking portion made of a non-light-transmitting material is arranged in an area of ​​the first surface opposite to the groove, and an orthographic projection of the masking portion on the second surface covers the corresponding groove.

[0019] Optionally, the direction perpendicular to the plane of the substrate is taken as the first direction, the direction perpendicular to the first direction is taken as the second direction, the minimum distance between the shielding portion and the adjacent light-emitting unit in the second direction is L3, the distance between the light-emitting unit and the first face portion in the first direction is L2, and L3≥L2.

[0020] Optionally, air bubbles exist in at least a portion of the groove, and the air bubbles are in contact with a groove bottom wall of the groove or a component arranged on the groove bottom wall of the groove.

[0021] The present invention further provides a display device, comprising a plurality of display panels, each of which is the above-mentioned display panel.

[0022] Since the above-mentioned display panel has already possessed the above-mentioned technical effects, the display device having the display panel should also possess similar technical effects, and thus will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an LED display panel in the prior art;

[0024] Figure 2 A schematic structural diagram of a specific implementation of a display panel provided by the present invention;

[0025] Figure 3 for Figure 2 A bottom view of the middle package cover;

[0026] Figure 4 for Figure 2 A structural schematic diagram of a variant of the invention;

[0027] Figure 5 A structural schematic diagram of a variation of the packaging cover plate;

[0028] Figure 6 A schematic structural diagram of another specific implementation of a display panel provided by the present invention;

[0029] Figure 7 It is a structural diagram of the connection between the package cover plate and the edge retaining wall and the middle retaining wall;

[0030] Figure 8 The figure is a schematic structural diagram of a specific implementation manner of the display device provided by the present invention.

[0031] Figure 1 The reference numerals in the figures are described as follows:

[0032] 01-Packaging cover, 02-Sealing glue, 03-Substrate, 04-LED module.

[0033] Figure 2-Figure 8 The reference numerals in the figures are described as follows:

[0034] 1-packaging cover plate, 11-first face portion, 111-first groove;

[0035] 2-Sealing glue;

[0036] 3-substrate, 31-second surface, 311-second groove;

[0037] 4-light emitting unit;

[0038] 5-Edge retaining wall;

[0039] 6- Middle retaining wall;

[0040] 7- shielding part;

[0041] 8- Bubbles;

[0042] 9- Raised part. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] The term “several” as used herein refers to an indefinite number of multiples, usually more than two; and when “several” is used to indicate the number of certain components, it does not indicate the quantitative relationship between these components.

[0045] The words "first", "second", etc. mentioned in this article are only for the convenience of describing two or more structures or components with the same or similar structures and / or functions, and do not imply any special limitation on the order and / or importance.

[0046] Please refer to Figure 2-Figure 7 , Figure 2A schematic diagram of a specific embodiment of a display panel provided by the present invention is shown in FIG. Figure 3 for Figure 2 Bottom view of the package cover. Figure 4 for Figure 2 A structural diagram of a variant of Figure 5 A structural schematic diagram of a variant of the packaging cover plate is shown in FIG. Figure 6 is a schematic structural diagram of another specific implementation of the display panel provided by the present invention, Figure 7 This is a structural diagram of the connection between the packaging cover plate and the edge retaining wall and the middle retaining wall.

[0047] like Figure 2 As shown, the present invention provides a display panel, including a packaging cover plate 1, a sealing glue 2, a substrate 3 and a light-emitting unit 4. The packaging cover plate 1 can generally be made of a transparent material, such as glass, etc., and is used to form the display side of the display panel. The packaging cover plate 1 and the substrate 3 can be arranged relative to each other, and generally speaking, the packaging cover plate 1 and the substrate 3 can be basically parallel; the space between the packaging cover plate 1 and the substrate 3 can be used to set the sealing glue 2 and the light-emitting unit 4. The light-emitting unit 4 can specifically be an LED module, and of course, it can also be other forms of light-emitting devices. During specific assembly, the light-emitting unit 4 can be located on the side of the substrate 3 close to the packaging cover plate 1, and installed on the substrate 3. The substrate 3 can be a printed circuit board, or at least the substrate 3 can be integrated with an electronic control component for controlling the light-emitting unit 4.

[0048] For the sake of ease of description, the direction perpendicular to the plane where the substrate 3 is located can be referred to as the first direction. Since the substrate 3 and the packaging cover plate 1 are usually arranged in parallel, the above-mentioned first direction can also be understood as the direction perpendicular to the plane where the packaging cover plate 1 is located; then, the direction perpendicular to the first direction can be referred to as the second direction. In fact, the direction perpendicular to the first direction is a plane, which can be the plane where the substrate 3 is located, or the plane where the packaging cover plate 1 is located. The second direction can be understood as the direction of any straight line on the plane.

[0049] At least one of the package cover plate 1 and the substrate 3 may be provided with an edge retaining wall 5, which at least partially surrounds the light-emitting unit 4 to surround the light-emitting unit 4 in at least a partial area in the circumferential direction. The package cover plate 1 has a first face 11, and the substrate 3 has a second face 31. The first face 11 and the second face 31 are arranged opposite to each other, and one of the first face 11 and the second face 31 is provided with a groove. Here, the embodiment of the present invention does not limit the size of the first face 11 and the second face 31 in the first direction; for ease of understanding, in the embodiment of the accompanying drawings, as shown in FIG. Figure 2As shown, the embodiment of the present invention exemplarily selects line A, line B and line C, and line B is actually the lower surface of the packaging cover plate 1. Then, the portion of the packaging cover plate 1 between line A and line B can be used as the first surface 11, and the portion of the substrate 3 between line C and the upper surface of the substrate 3 can be used as the second surface 31.

[0050] The groove and the light-emitting unit 4 are staggered, and the staggered setting here means that there is no overlapping area between the groove and the light-emitting unit 4 in the first direction. The edge retaining wall 5 at least partially surrounds the groove to surround the groove in at least a partial area in the circumferential direction. The sealing glue 2 can be filled between the packaging cover plate 1, the edge retaining wall 5 and the substrate 3. In the direction from the packaging cover plate 1 to the substrate 3, the sealing glue 2 covers the light-emitting unit 4 to connect the packaging cover plate 1 and the substrate 3.

[0051] With this structure, the edge retaining wall 5 can form a protective stopper in the circumferential direction, which can reduce the overflow of the sealing glue 2 during the pressing process of the package cover plate 1 and the substrate 3. In addition, one of the first surface 11 and the second surface 31 is also provided with a groove, which can gather the bubbles 8 generated by the poor flow of the sealing glue 2 caused by the setting of the edge retaining wall 5; in this way, the formation of bubbles 8 in other positions can be reduced as much as possible, and the areas where the grooves are not provided in the first surface 11 and the second surface 31 and the light-emitting unit 4 can be well ensured to be closely fitted with the sealing glue 2, thereby improving the fitting effect. At the same time, the groove and the light-emitting unit 4 are staggered, which can reduce the influence of the groove and the bubbles 8 in the groove on the light emission of the light-emitting unit 4, which is conducive to ensuring the display effect of the display panel provided by the present invention.

[0052] Here, the embodiment of the present invention does not limit the number of light emitting units 4, the number and shape of grooves, and in practice, those skilled in the art can configure them according to actual needs. Generally speaking, the number of light emitting units 4 and grooves can be multiple.

[0053] During specific assembly, the sealant 2 can cover each light-emitting unit 4. However, the filling amount and filling state of the sealant 2 in each groove may be different, which is specifically related to parameters such as the type and amount of the sealant 2. In detail, the sealant 2 can completely fill a part of the grooves so that there are no bubbles 8 in the grooves of this part, and at the same time, the sealant 2 can incompletely fill another part of the grooves so that there are bubbles 8 in the grooves of this part; or, the sealant 2 can also incompletely fill all the grooves so that there are bubbles 8 in all the grooves.

[0054] For the groove with the bubble 8, the bubble 8 can be located at the bottom of the groove and isolate the sealant 2 from the bottom of the groove. This solution can be seen in Figure 2 , Figure 4 and Figure 6 , at this time, the bubble 8 is a complete large bubble. Alternatively, the bubble 8 may not isolate the sealant 2, so that the sealant 2 can contact the bottom wall of the groove or a component disposed on the bottom wall of the groove (such as the shielding portion 7 described later). In this case, the bubble 8 may be located at the bottom of the groove and in contact with the bottom wall or a component disposed on the bottom wall of the groove, or the bubble 8 may be suspended in the sealant 2 in the groove, all of which may exist during the specific assembly process; and the bubble 8 in this case may be a complete large bubble, or may include a number of small bubbles.

[0055] The edge retaining wall 5 may be a circumferentially closed annular retaining wall, such as Figure 3 and Figure 5 Alternatively, the edge retaining wall 5 may also be a circumferentially non-enclosed retaining wall, in which case the edge retaining wall 5 can only protect and stop a local area on the circumference of the display panel, which can also alleviate the overflow of the sealing glue 2 to a certain extent.

[0056] The height of the edge retaining wall 5 is not limited here, which is specifically related to the size of the light emitting unit 4 in the first direction. Generally speaking, the height of the edge retaining wall 5 should be set to avoid the light emitting unit 4 and the packaging cover plate 1 from abutting against each other, so as to prevent the weight of the packaging cover plate 1 from directly acting on the light emitting unit 4, which is conducive to ensuring the service life of the light emitting unit 4.

[0057] The edge retaining wall 5 can be arranged on at least one of the package cover plate 1 and the substrate 3. Specifically, in the embodiment of the present invention, it is preferred to adopt a solution of configuring the edge retaining wall 5 on the package cover plate 1, so as to avoid interference with the installation of the light-emitting unit 4 on the substrate 3. Of course, for the solution of arranging the edge retaining wall 5 on the substrate 3, the light-emitting unit 4 can be first installed on the substrate 3 and then the edge retaining wall 5 can be arranged to avoid the influence of the setting of the edge retaining wall 5 on the installation of the light-emitting unit 4 on the substrate 3.

[0058] Take the configuration on the package cover plate 1 as an example. During specific assembly, the edge retaining wall 5 can be in contact with the substrate 3; or, the edge retaining wall 5 can be in contact with the substrate 3 through the sealant 2, that is, the sealant 2 can be filled between the edge retaining wall 5 and the substrate 3 to seal the gap between the edge retaining wall 5 and the substrate 3. Specifically in the embodiment of the present invention, it is preferred to adopt the latter solution, so that the display panel provided by the present invention has better waterproof and dustproof performance, and can better prevent dust and other impurities from entering the display panel from the gap between the edge retaining wall 5 and the substrate 3.

[0059] The edge retaining wall 5 and the packaging cover plate 1 (or the substrate 3) can be an integrated structure. The integrated structure here means that the edge retaining wall 5 and the packaging cover plate 1 can be formed by an integrated molding process, so that the assembly process can be simplified.

[0060] In addition, Figure 7 As shown, the edge retaining wall 5 and the packaging cover plate 1 can also be prepared separately, and then the two can be connected. The specific connection method can be gluing, melting connection, welding, etc.; or, the packaging cover plate 1 can be prepared first, and then the edge retaining wall 5 can be prepared based on the packaging cover plate 1 by using a coating, exposure, development and baking process. Here, the embodiment of the present invention is mainly briefly described for the latter implementation method: in specific implementation, photoresist can be coated on the side of the packaging cover plate 1 facing the substrate 3, and the specific coating method includes spin coating, slit coating, dispensing, and glue filling molding; then the area where the edge retaining wall 5 is to be set can be exposed, developed and baked, and the exposed part can be cured to form the edge retaining wall 5, and the unexposed part can be washed away by the developer.

[0061] The display panel includes a display area and a non-display area. Generally speaking, the non-display area can be located at the outer edge of the display panel and surround it. The area surrounded by the non-display area is the display area. The aforementioned edge retaining wall 5 can be located in the non-display area. According to the setting length of the edge retaining wall 5, the edge retaining wall 5 can surround the entire display area, or only surround part of the display area.

[0062] Furthermore, the display panel may further include a middle retaining wall 6, the display area may include a light-emitting area and a non-light-emitting area, the light-emitting unit 4 may be located in the light-emitting area, and the middle retaining wall 6 may be located in the non-light-emitting area between the light-emitting units 4 to avoid occupying the light-emitting area. The setting of the middle retaining wall 6 can guide the sealant 2 to promote the flow of the sealant 2 between the packaging cover plate 1 and the substrate 3, which can better avoid the formation of large-volume bubbles 8.

[0063] Similar to the configuration of the edge retaining wall 5, the middle retaining wall 6 can also be configured on at least one of the package cover plate 1 and the substrate 3, and is preferably configured on the package cover plate 1 to avoid affecting the installation of the light-emitting unit 4 on the substrate 3. Taking the configuration on the package cover plate 1 as an example, the connection method and connection process of the middle retaining wall 6 and the package cover plate 1 can refer to the aforementioned description of the edge retaining wall 5, and no repeated description is given here.

[0064] When selecting materials, at least one of the middle retaining wall 6 and the edge retaining wall 5 can be made of a non-light-transmitting material to reduce light leakage.

[0065] Here, the embodiment of the present invention does not limit the specific structural form of the middle retaining wall 6. During the specific implementation, those skilled in the art can set it according to actual needs as long as the corresponding technical effects can be achieved. Figure 3 and Figure 5 Two specific structural forms of the middle retaining wall 6 are described.

[0066] like Figure 3 As shown, the middle retaining wall 6 can be cross-shaped, and the middle retaining wall 6 and the edge retaining wall 5 can be connected or in contact with each other to enclose and form four spaced cavities. The first face 11 and the second face 31 can be provided with a cross-shaped groove in the area of ​​the cavity, and light-emitting units 4 are arranged at the four corners of the cavity. In this way, there can be a groove or a middle retaining wall 6 between two adjacent light-emitting units 4, and there can be a middle retaining wall 6 between two adjacent grooves 111, so as to better guide the sealant 2, and can largely avoid the situation where the sealant 2 is unevenly distributed.

[0067] The above-mentioned cavity can also be entirely enclosed by the middle retaining wall 6. In this case, there can be multiple middle retaining walls 6, and each middle retaining wall 6 can be in contact or connected to enclose the above-mentioned cavity. The number of middle retaining walls 6 used to enclose and form the cavity can be unlimited, which is specifically related to the structural shape of the cavity.

[0068] like Figure 5 As shown, the number of each middle retaining wall 6 can also be multiple, each middle retaining wall 6 can be spaced apart from each other, and the middle retaining wall 6 and the edge retaining wall 5 can also be spaced apart, that is, each middle retaining wall 6 can be dispersedly arranged. In this solution, there is no aforementioned chamber formation, the sealing glue 2 can flow in all directions, the middle retaining wall 6 has a better guiding effect on the sealing glue 2, and is more conducive to avoiding the formation of large-volume bubbles 8.

[0069] At the same time, Figure 5 In the embodiment, there may be a groove between two adjacent light-emitting units 4, there may be a middle retaining wall 6 or a light-emitting unit 4 between the two adjacent grooves, there may be another groove between the two adjacent middle retaining walls 6, and the light-emitting unit 4, the groove and the middle retaining wall 6 may be adjacent to each other, which can promote the uniform flow of the sealing glue 2.

[0070] Of course, in actual use, the relationship between the middle retaining wall 6 and the groove can be other styles, not limited to the above situation. For example, when the middle retaining wall 6 and the groove are arranged in the same component, the middle retaining wall 6 can also be arranged at the bottom of the groove, and in this case, the groove can at least partially surround the middle retaining wall 6; when the middle retaining wall 6 and the groove are arranged in two components respectively, the projection of the middle retaining wall 6 in the first direction can also partially cover the groove, which is also feasible.

[0071] As mentioned above, the groove can be provided on the first surface 11 or on the second surface 31. For the convenience of distinction, the groove provided on the first surface 11 can be referred to as the first groove 111, and the groove provided on the second surface 31 can be referred to as the second groove 311.

[0072] like Figure 2 As shown, the first surface 11 may be provided with a first groove 111, and the area of ​​the first surface 11 where the first groove 111 is not provided may form a convex portion 9, and these convex portions 9 may be opposite to the light emitting unit 4; Figure 3 and Figure 5 In a specific application, one protrusion 9 may correspond to one light-emitting unit 4 (the virtual frame schematically encloses the outline of the light-emitting unit 4), or one protrusion 9 may correspond to multiple light-emitting units 4. In this case, during assembly, the sealant 2 may be disposed on the substrate 3, and then the package cover plate 1 may be pressed toward the substrate 3, so that the sealant 2 may cover each light-emitting unit 4 and the bubbles 8 may be gathered in each first groove 111.

[0073] The offset between the first groove 111 and the light emitting unit 4 may not be limited. In practical applications, those skilled in the art may configure it according to actual needs, which is specifically related to the required light output angle of the light emitting unit 4. Figure 2 As shown, the minimum spacing between the side wall of the first groove 111 and the adjacent light-emitting unit 4 in the second direction can be recorded as L1, and the minimum spacing between the light-emitting unit 4 and the first surface 11 in the first direction can be recorded as L2; ​​during design and manufacturing, L1 can be controlled to be greater than or equal to L2, so that the light-emitting unit 4 can have at least approximately 45 degrees of light output angle, thereby ensuring the set light output range.

[0074] Furthermore, if Figure 4 As shown, a shielding portion 7 made of a non-light-transmitting material may also be provided. The shielding portion 7 may be provided in the first groove 111 to at least cover the bottom wall of the first groove 111 in the first direction, thereby shielding the first groove 111 and preventing the air bubble 8 from being exposed.

[0075] Here, the embodiment of the present invention does not limit the material and color of the shielding baffle 7. During specific implementation, those skilled in the art can set it according to actual needs as long as the technical effect of shading can be achieved. For example, the shielding baffle 7 can be black, silver-gray, etc. The preparation process of the shielding baffle 7 can refer to the aforementioned edge baffle 5 and middle baffle 6, and no repeated description is given here.

[0076] The first groove 111 may be prepared by digging a groove on the package cover plate 1. Alternatively, the first groove 111 may be formed indirectly by installing the protrusion 9. Alternatively, the first groove 111 may be formed with the package cover plate 1 by an integral molding process.

[0077] In addition, the first groove 111 can also be prepared by referring to the preparation process of the edge retaining wall 5 and the middle retaining wall 6. Specifically, the package cover plate 1 can be divided into a main body 1a and a first face 11, and the main body 1a can be made of ordinary glass material, etc. Then, photoresist can be coated on the side of the main body 1a facing the substrate 3; then, the area other than the first groove 111 can be exposed, developed and baked, and the exposed part can be cured to form the protrusion 9, and the unexposed part can be washed away by the developer to form the first groove 111. When the first face 11 is prepared by this process, the first face 11, the edge retaining wall 5 and the middle retaining wall 6 can actually be prepared at the same time; of course, the three can also be prepared in batches one by one.

[0078] When the first face 11, the edge retaining wall 5, and the middle retaining wall 6 are non-integrated structures, the protrusion 9 and the two types of retaining walls can be in contact in the first direction and / or the second direction ( Figure 7 The middle retaining wall 6 may be located in the first groove 111, or may be staggered with the first groove 111 in the plane where the packaging cover plate 1 is located, which may be adopted in specific practice.

[0079] like Figure 6 As shown, the second surface 31 may be provided with a second groove 311. In this case, during assembly, the sealant 2 may be provided on the packaging cover plate 1, and then the control substrate 3 may be pressed toward the packaging cover plate 1, so that the sealing glue 2 may better cover the packaging cover plate 1 and each light-emitting unit 4, and the bubbles 8 may be gathered in each second groove 311. Since the second groove 311 is located on the non-display side of the display panel, it is not necessary to consider the effect of the second groove 311 on the light emission of the light-emitting unit 4. The formation method of the second groove 311 may refer to the description of the first groove 111, and no repetitive description is given here.

[0080] Furthermore, a masking portion 7 made of non-transparent material may be provided in the area opposite to the first surface 11 and the second groove 311 , and the orthographic projection of the masking portion 7 on the second surface 31 may cover the corresponding second groove 311 to avoid exposure of bubbles 8 accumulated in the second groove 311 .

[0081] In practical applications, each shielding block 7 and the light emitting unit 4 may also be staggered to minimize the effect of the shielding block 7 on the light emitting unit 4. The specific value of the staggered amount is not limited here. In specific practice, those skilled in the art may determine it in combination with the required light emitting angle of the light emitting unit 4. In an exemplary embodiment, Figure 6 As shown, the minimum spacing between the shielding portion 7 and the adjacent light-emitting unit 4 in the second direction can be recorded as L3, and the spacing between the light-emitting unit 4 and the first surface portion 11 in the first direction can be recorded as L2; ​​during design and manufacturing, L3 can be controlled to be greater than or equal to L2, so that the light-emitting unit 4 can have at least a light-emitting angle of approximately 45 degrees, thereby ensuring the set light-emitting range.

[0082] Please refer to Figure 8 , Figure 8 The figure is a schematic structural diagram of a specific implementation manner of the display device provided by the present invention.

[0083] like Figure 8 As shown, the present invention further provides a display device, including a plurality of display panels, each of which can be a display panel involved in each of the above embodiments. The number of display panels may not be limited, and during specific assembly, each display panel may be spliced ​​together to form a desired display device.

[0084] Since the above-mentioned display panel has already possessed the above-mentioned technical effects, the display device having the display panel should also possess similar technical effects, and thus will not be described in detail herein.

[0085] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A display panel, comprising a packaging cover plate (1), a sealing glue (2), a substrate (3) and a light-emitting unit (4), characterized in that: The packaging cover plate (1) and the substrate (3) are arranged opposite to each other, and the light-emitting unit (4) is located on a side of the substrate (3) close to the packaging cover plate (1); at least one of the packaging cover plate (1) and the substrate (3) is provided with an edge retaining wall (5), and the edge retaining wall (5) at least partially surrounds the light-emitting unit (4); The packaging cover plate (1) has a first surface (11), the substrate (3) has a second surface (31), the first surface (11) and the second surface (31) are arranged opposite to each other, one of the first surface (11) and the second surface (31) is provided with a groove, the groove is staggered with the light-emitting unit (4), and the edge retaining wall (5) at least partially surrounds the groove; The sealing glue (2) is filled between the packaging cover plate (1), the edge retaining wall (5) and the substrate (3), and in a direction from the packaging cover plate (1) to the substrate (3), the sealing glue (2) covers the light-emitting unit (4).

2. The display panel according to claim 1, characterized in that: The edge retaining wall (5) is arranged on the packaging cover plate (1), and the edge retaining wall (5) is in contact with the substrate (3), or the edge retaining wall (5) is in contact with the substrate (3) through the sealing glue (2).

3. The display panel according to claim 2, characterized in that: The edge retaining wall (5) and the packaging cover plate (1) are an integrated structure.

4. The display panel according to any one of claims 1 to 3, characterized in that: The display panel comprises a display area and a non-display area, the edge retaining wall (5) is located in the non-display area, and the edge retaining wall (5) at least partially surrounds the display area; The display panel further comprises a middle retaining wall (6); the display area comprises a light-emitting area and a non-light-emitting area; the light-emitting unit (4) is located in the light-emitting area; and the middle retaining wall (6) is located in the non-light-emitting area; the middle retaining wall (6) is arranged on at least one of the packaging cover plate (1) and the substrate (3).

5. The display panel according to claim 4, characterized in that: The middle retaining wall (6) is arranged on the packaging cover plate (1), and the middle retaining wall (6) and the packaging cover plate (1) are an integrated structure.

6. The display panel according to claim 4, characterized in that: At least one of the middle retaining wall (6) and the edge retaining wall (5) is made of a non-light-transmitting material.

7. The display panel according to claim 4, characterized in that: The middle retaining wall (6) and the edge retaining wall (5) are connected or in contact with each other to enclose and form a circumferentially closed cavity; or, parts of the middle retaining wall (6) are connected or in contact with each other to enclose and form a circumferentially closed cavity; At least one of the light-emitting units (4) is arranged in the region of the cavity, and at least one of the grooves is arranged in the region of the cavity on the first surface (11) and the second surface (31).

8. The display panel according to claim 4, characterized in that: There are a plurality of the middle retaining walls (6), each of the middle retaining walls (6) is spaced apart from each other, and the middle retaining walls (6) are spaced apart from the edge retaining walls (5).

9. The display panel according to claim 4, characterized in that: The number of the light-emitting units (4) is plural, the light-emitting units (4) are arranged at intervals, and the display panel is provided with one groove or one middle retaining wall (6) between any two adjacent light-emitting units (4); and / or, There are a plurality of grooves, each of which is arranged at intervals, and the display panel is provided with one light-emitting unit (4) or one middle retaining wall (6) between any two adjacent grooves.

10. The display panel according to any one of claims 1 to 3, characterized in that: The groove is arranged on the first surface (11), with the direction perpendicular to the plane where the substrate (3) is located being the first direction, and the direction perpendicular to the first direction being the second direction, the minimum spacing between the groove side wall and the adjacent light-emitting unit (4) in the second direction is L1, and the spacing between the light-emitting unit (4) and the first surface (11) in the first direction is L2, and L1≥L2.

11. The display panel according to claim 10, characterized in that: It also comprises a shielding block (7) made of a non-light-transmissive material, wherein the shielding block (7) at least covers the bottom wall of the groove in the first direction.

12. The display panel according to any one of claims 1 to 3, characterized in that: The groove is arranged on the second surface (31), and a shielding portion (7) made of a non-light-transmitting material is arranged in an area of ​​the first surface (11) opposite to the groove, and the orthographic projection of the shielding portion (7) on the second surface (31) covers the corresponding groove.

13. The display panel according to claim 12, characterized in that: The direction perpendicular to the plane where the substrate (3) is located is taken as the first direction, and the direction perpendicular to the first direction is taken as the second direction. The minimum spacing between the shielding portion (7) and the adjacent light-emitting unit (4) in the second direction is L3, and the spacing between the light-emitting unit (4) and the first surface portion (11) in the first direction is L2, and L3 ≥ L2.

14. The display panel according to any one of claims 1 to 3, characterized in that: There are air bubbles (8) in at least part of the groove, and the air bubbles (8) are in contact with the groove bottom wall of the groove or a component arranged on the groove bottom wall of the groove.

15. A display device, comprising a plurality of display panels, characterized in that: Each of the display panels is a display panel as described in any one of claims 1-14.

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