Display panel and display device

Abstract

The invention provides a display panel and a display device, relates to the technical field of display, and can improve the surface flatness of the display panel. The display panel includes: a substrate; the bonding cushion layer is located on one side of the substrate; the bonding layer is located on the side, away from the substrate, of the bonding cushion layer; the light-emitting elements are located on the side, away from the substrate, of the bonding layer, the light-emitting elements comprise the first light-emitting element and the second light-emitting element, and the first light-emitting element and the second light-emitting element are light-emitting elements of different colors; the conductive reflecting layer is located between the bonding cushion layer and the bonding layer, the conductive reflecting layer comprises a first reflecting structure and a second reflecting structure, the first reflecting structure corresponds to the first light-emitting element, the second reflecting structure corresponds to the second light-emitting element, and the first reflecting structure is different from the second reflecting structure; and / or a supporting layer, the supporting layer at least comprises a first supporting structure, and the first supporting structure is located on the side, close to the substrate, of the bonding cushion layer corresponding to the first light-emitting element.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of display technology, and in particular, to a display panel and a display device. Background Art

[0002] With the development and progress of display technologies such as flexible display panels, the requirements for the production efficiency and production quality of display panels and display devices have been improved. In the traditional production process of display panels, a bonding metal layer, a bonding layer and a light-emitting element are usually arranged on one side of a substrate in sequence, and the bonding layer is irradiated with a laser to make the bonding layer reach a molten state. In the molten state, the bonding layer is used to adhere the light-emitting element to the bonding metal layer to achieve the fixation and electrical connection of the light-emitting element.

[0003] However, in the preparation process of traditional display panels, it is difficult to control the melting state of the bonding layer, which can easily lead to inconsistent melting effects of different bonding layers on the same display panel, and then cause differences in the thickness of the bonding layer after re-solidification, resulting in poor surface flatness of the display panel, affecting the display effect of the display panel. Summary of the invention

[0004] Based on this, the embodiments of the present application provide a display panel and a display device, which can improve the ability to control the melting state of the bonding layer during the preparation process, improve the consistency of the melting effects of different bonding layers on the same display panel, and further improve the surface flatness of the display panel and improve the display effect of the display panel.

[0005] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0006] substrate;

[0007] A bonding pad layer, located on one side of the substrate;

[0008] A bonding layer, located on a side of the bonding pad layer away from the substrate;

[0009] A light-emitting element is located on a side of the bonding layer away from the substrate, the light-emitting element comprises a first light-emitting element and a second light-emitting element, and the first light-emitting element and the second light-emitting element are light-emitting elements of different colors;

[0010] a conductive reflective layer, located between the bonding pad layer and the bonding layer, the conductive reflective layer comprising a first reflective structure and a second reflective structure, wherein the first reflective structure corresponds to the first light-emitting element, the second reflective structure corresponds to the second light-emitting element, and the first reflective structure is different from the second reflective structure; and / or,

[0011] A supporting layer, wherein the supporting layer at least comprises a first supporting structure, and the first supporting structure is located on a side of the bonding pad layer corresponding to the first light-emitting element close to the substrate.

[0012] In some embodiments, an emission wavelength of the first light emitting element is greater than an emission wavelength of the second light emitting element, and a reflectivity of the first reflective structure is less than a reflectivity of the second reflective structure.

[0013] In some embodiments, a reflectivity of a first reflective material included in the first reflective structure is less than a reflectivity of a second reflective material included in the second reflective structure.

[0014] In some embodiments, the light transmittance of the first light emitting element is a first light transmittance, the light transmittance of the second light emitting element is a second light transmittance, and the first light transmittance is greater than the second light transmittance;

[0015] The difference between the reflectivity of the first reflective material and the reflectivity of the second reflective material is positively correlated with the difference between the first light transmittance and the second light transmittance.

[0016] In some embodiments, the thickness of the first reflective structure is less than or equal to the thickness of the second reflective structure; and / or,

[0017] An orthographic projection of the bonding layer toward the substrate falls within an orthographic projection of the conductive reflective layer toward the substrate.

[0018] In some embodiments, an orthographic projection of the bonding layer toward the substrate coincides with an edge of an orthographic projection of the conductive reflective layer toward the substrate.

[0019] In some embodiments, the light transmittance of the first light emitting element is a first light transmittance, the light transmittance of the second light emitting element is a second light transmittance, and the first light transmittance is greater than the second light transmittance;

[0020] In the thickness direction of the substrate, the thickness dimension of the first supporting structure is positively correlated with the difference between the first light transmittance and the second light transmittance.

[0021] In some embodiments, the display panel further includes:

[0022] A driving circuit layer, located between the bonding pad layer and the substrate;

[0023] The bonding pad layer comprises a first bonding pad structure and a second bonding pad structure which are arranged at intervals, the first bonding pad structure is electrically connected to the first light-emitting element, and the first bonding pad structure is located on a side of the first supporting structure away from the substrate;

[0024] The first supporting structure has an opening, the second bonding pad structure is located in the opening, and the second bonding pad structure is electrically connected between the first light emitting element and the driving circuit layer through the opening.

[0025] In some embodiments, the support layer further includes a second support structure, the second support structure is located between the bonding pad layer corresponding to the second light-emitting element and the substrate, and the thickness of the second support structure is smaller than the thickness of the first support structure.

[0026] In some embodiments, the light-emitting element further includes a third light-emitting element, and the first light-emitting element and the third light-emitting element are light-emitting elements of different colors;

[0027] The conductive reflective layer further includes a third reflective structure, wherein the third reflective structure corresponds to the third light emitting element, and the first reflective structure is different from the third reflective structure.

[0028] In some embodiments, the display panel includes a first area and a second area, the first area is connected to the second area, and the laser energy in the first area is less than the laser energy in the second area;

[0029] The reflectivity of the first reflective structure in the first region is greater than the reflectivity of the first reflective structure in the second region, and the reflectivity of the second reflective structure in the first region is greater than the reflectivity of the second reflective structure in the second region.

[0030] According to a second aspect of an embodiment of the present application, a display device is provided, including:

[0031] A display panel as described in any one of the first aspects above.

[0032] A display panel and a display device provided by an embodiment of the present application, by setting a conductive reflective layer between a bonding pad layer and a bonding layer, the laser light emitted by a light-emitting element can be reflected to the bonding layer by the conductive reflective layer, thereby improving the utilization rate of laser energy. Furthermore, by setting different reflective structures corresponding to light-emitting elements with different luminous colors, and adjusting the light reflection ability of the reflective structure according to the laser transmittance of different light-emitting elements, the laser transmittance of the light-emitting element and the light reflection ability of the corresponding reflective structure can be balanced, so that under the same laser conditions, the melting state of the bonding layer corresponding to different light-emitting elements is consistent, and the height after melting is consistent. A supporting layer can also be set on the side of the bonding pad layer corresponding to the light-emitting element with large laser transmittance close to the substrate, and the light-emitting element with large laser transmittance is raised, so that the reduced thickness of the bonding layer of the light-emitting element can be compensated. Therefore, the control ability of the melting state of the bonding layer during the preparation process can be improved, the height uniformity of different light-emitting elements after bonding can be improved, and the surface flatness of the display panel can be further improved, and the display effect of the display panel can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] FIG1 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

[0035] FIG2 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0036] FIG3 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0037] FIG4 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0038] FIG5 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

[0039] FIG6 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

[0040] FIG. 7 is a schematic structural diagram of a display device provided in an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 100-substrate, 200-bonding pad layer, 210-first bonding pad structure, 220-second bonding pad structure, 300-bonding layer, 400-light-emitting element, 410-first light-emitting element, 420-second light-emitting element, 430-third light-emitting element, 500-conductive reflective layer, 510-first reflective structure, 520-second reflective structure, 530-third reflective structure, 600-supporting layer, 610-first supporting structure, 620-second supporting structure, 700-driving circuit layer. DETAILED DESCRIPTION

[0043] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0045] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers, doping types and / or parts, these elements, components, regions, layers, doping types and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, doping type or part from another element, component, region, layer, doping type or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer, doping type or portion discussed below may be represented as a second element, component, region, layer or portion; for example, the first doping type may be referred to as the second doping type, and similarly, the second doping type may be referred to as the first doping type; the first doping type and the second doping type are different doping types, for example, the first doping type may be P-type and the second doping type may be N-type, or the first doping type may be N-type and the second doping type may be P-type.

[0046] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0047] When used herein, the singular forms "a", "an" and " / the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, in this specification, the term "and / or" includes any and all combinations of the relevant listed items.

[0048] It should be noted that in the preparation process of traditional display panels, in order to improve the light extraction rate of light-emitting elements, a light extraction structure is usually set on the surface of the light-emitting elements. However, since the preparation process of red light-emitting elements is different from that of other light-emitting elements, it is difficult to form a light extraction structure on the surface of red light-emitting elements. In the process of fixing the light-emitting elements by laser bonding process, the external incident laser will penetrate the light-emitting elements and enter the bonding layer. Since the surface of the red light-emitting elements is flat, the amount of laser incident on the bonding layer of the red light-emitting elements is greater than that of other light-emitting elements with light extraction structures. Therefore, the height loss of the bonding layer of the red light-emitting elements during the bonding process is the largest, which will cause the heights of light-emitting elements of different colors on the display panel to be inconsistent after bonding under the same laser conditions, resulting in poor surface flatness of the display panel, affecting the display effect of the display panel.

[0049] Based on the above problems, the embodiments of the present application provide a display panel and a display device, which can improve the ability to control the melting state of the bonding layer during the preparation process, improve the consistency of the melting effects of different bonding layers on the same display panel, and further improve the surface flatness of the display panel and improve the display effect of the display panel.

[0050] As shown in FIG. 1 , a first aspect of an embodiment of the present application provides a display panel, including: a substrate 100 , a bonding pad layer 200 , a bonding layer 300 , a light emitting element 400 , a conductive reflective layer 500 and a support layer. Among them, the bonding pad 200 is located on one side of the substrate 100; the bonding layer 300 is located on the side of the bonding pad 200 away from the substrate 100; the light-emitting element 400 is located on the side of the bonding layer 300 away from the substrate 100, and the light-emitting element 400 includes a first light-emitting element 410 and a second light-emitting element 420, and the first light-emitting element 410 and the second light-emitting element 420 are light-emitting elements 400 of different colors; the conductive reflective layer 500 is located between the bonding pad 200 and the bonding layer 300, and the conductive reflective layer 500 includes a first reflective structure 510 and a second reflective structure 520, wherein the first reflective structure 510 corresponds to the first light-emitting element 410, the second reflective structure 520 corresponds to the second light-emitting element 420, and the first reflective structure 510 is different from the second reflective structure 520; the supporting layer 600 includes at least a first supporting structure 610, and the first supporting structure 610 is located on the side of the bonding pad 200 corresponding to the first light-emitting element 410 close to the substrate 100.

[0051] Exemplarily, the bonding pad layer 200 includes a metal pad, and the material of the bonding pad layer 200 may include a composite material such as titanium-aluminum-titanium.

[0052] It should be noted that the first light-emitting element 410 and the second light-emitting element 420 having different luminous colors have different materials and preparation processes, which will lead to different surface morphologies. Furthermore, when external light passes through, the emission angle of the light after passing through the second light-emitting element 420 will change, making it difficult to enter the bonding layer 300. Therefore, during the laser bonding process, the laser incident amount of the bonding layer 300 corresponding to the first light-emitting element 410 and the second light-emitting element 420 is different, the melting state of the bonding layer 300 under the action of the laser is different, and the height of the molten bonding layer 300 after solidification is different, which will lead to different surface heights of the light-emitting element 400 connected to the substrate 100.

[0053] As shown in FIG2 , the surface of the first light emitting element 410 away from the substrate 100 is a flat surface, and the surface of the second light emitting element 420 away from the substrate 100 is a concave-convex surface. The laser light incident on the bonding layer 300 through the light emitting element 400 may include a first light L1 and a second light L2. The first light emitting element 410 corresponds to the first light L1, and the second light emitting element 420 corresponds to the second light L2. It can be seen that for the first light L1, the optical path after being emitted by the first light emitting element 410 is basically unchanged, and it can be directly incident on the bonding layer 300 corresponding to the first light emitting element 410, so that the bonding layer 300 corresponding to the first light emitting element 410 reaches a molten state. For the second light ray L2, the light path after being emitted from the second light-emitting element 420 changes, and it cannot directly enter the bonding layer 300 corresponding to the second light-emitting element 420, but can enter the surface of the second reflective structure 520, and then be reflected by the second reflective structure 520 and re-enter the bonding layer 300 corresponding to the second light-emitting element 420, so that the bonding layer 300 corresponding to the second light-emitting element 420 reaches a molten state.

[0054] It should be noted that the first reflective structure 510 is different from the second reflective structure 520 , which may include different reflectivities of the first reflective structure 510 and the second reflective structure 520 , and different shapes of the first reflective structure 510 and the second reflective structure 520 .

[0055] The display panel provided by the embodiment of the present application, by setting a conductive reflective layer 500 between the bonding pad layer 200 and the bonding layer 300, the laser light emitted by the light-emitting element 400 can be reflected by the conductive reflective layer 500 to the bonding layer 300, thereby improving the utilization rate of the laser energy. Furthermore, by setting different reflective structures corresponding to the light-emitting elements 400 with different luminous colors, and adjusting the light reflection ability of the reflective structure according to the laser transmittance of different light-emitting elements 400, the laser transmittance of the light-emitting element 400 and the light reflection ability of the corresponding reflective structure can be balanced, so that under the same laser conditions, the melting state of the bonding layer 300 corresponding to different light-emitting elements 400 is consistent, and the height after melting is consistent. A support layer 600 can also be set on the side of the bonding pad layer 200 corresponding to the light-emitting element 400 with large laser transmittance close to the substrate 100, so as to raise the light-emitting element 400 with large laser transmittance, thereby compensating for the reduced thickness of the bonding layer 300 of the light-emitting element 400. Therefore, the ability to control the melting state of the bonding layer 300 during the preparation process can be improved, the height uniformity of different light-emitting elements 400 after bonding can be improved, and the surface flatness of the display panel can be further improved, thereby improving the display effect of the display panel.

[0056] In some embodiments, the emission wavelength of the first light emitting element 410 is greater than the emission wavelength of the second light emitting element 420 , and the reflectivity of the first reflective structure 510 is less than the reflectivity of the second reflective structure 520 .

[0057] It should be noted that the first light emitting element 410 may include a light emitting element 400 emitting red light, and the second light emitting element 420 may include a light emitting element 400 emitting blue or green light.

[0058] The display panel provided in the embodiment of the present application can reflect the laser in the bonding process through the second reflective structure 520 with strong reflective ability, so as to compensate for the laser incident amount of the bonding layer 300 corresponding to the second light-emitting element 420, by making the reflectivity of the first reflective structure 510 corresponding to the first light-emitting element 410 with a large emission wavelength smaller than the reflectivity of the second reflective structure 520 corresponding to the second light-emitting element 420 with a small emission wavelength. Therefore, the laser incident amounts of the bonding layer 300 corresponding to the first light-emitting element 410 and the second light-emitting element 420 are equal, which can improve the control ability of the molten state of the bonding layer 300 during the preparation process, improve the height uniformity of different light-emitting elements 400 after bonding, and further improve the surface flatness of the display panel, thereby improving the display effect of the display panel.

[0059] In some embodiments, a reflectivity of a first reflective material included in the first reflective structure 510 is less than a reflectivity of a second reflective material included in the second reflective structure 520 .

[0060] Exemplarily, the absorptivity of the first reflective material included in the first reflective structure 510 may be greater than the absorptivity of the second reflective material included in the second reflective structure 520. The first reflective material may include chromium oxide, titanium, nickel, etc., and the second reflective material may include silver, copper, etc.

[0061] The display panel provided in the embodiment of the present application can make the reflectivity of the first reflective structure 510 smaller than the reflectivity of the second reflective structure 520, so that the laser incident amount of the bonding layer 300 corresponding to the first light-emitting element 410 and the second light-emitting element 420 can be equal, which can improve the ability to control the molten state of the bonding layer 300 during the preparation process, improve the height uniformity of different light-emitting elements 400 after bonding, and further improve the surface flatness of the display panel, thereby improving the display effect of the display panel.

[0062] In some embodiments, the light transmittance of the first light emitting element 410 is the first light transmittance, the light transmittance of the second light emitting element 420 is the second light transmittance, and the first light transmittance is greater than the second light transmittance; the difference between the reflectivity of the first reflective material and the reflectivity of the second reflective material is positively correlated with the difference between the first light transmittance and the second light transmittance.

[0063] It should be noted that when the first light transmittance is greater than the second light transmittance, it can be considered that the laser incident amount on the bonding layer 300 corresponding to the first light emitting element 410 during the laser bonding process is greater than the laser incident amount on the bonding layer 300 corresponding to the second light emitting element 420.

[0064] The display panel provided in the embodiment of the present application can facilitate the control of the amount of light incident on the bonding layer 300 corresponding to the first light-emitting element 410 and the modified bonding layer 300 corresponding to the second light-emitting element 420 to be equal, thereby making the heights of the first light-emitting element 410 and the second light-emitting element 420 equal after bonding, and further improving the surface flatness of the display panel and the display effect of the display panel.

[0065] As shown in FIG. 3 , in some embodiments, the thickness of the first reflective structure 510 is less than or equal to the thickness of the second reflective structure 520 .

[0066] It should be noted that, for the bonding layer 300 corresponding to the first light-emitting element 410, the thickness dimension after re-solidification after melting is greater than the bonding layer 300 corresponding to the second light-emitting element 420. Therefore, by increasing the thickness dimension of the second reflective structure 520, the second light-emitting element 420 can be raised, so as to further compensate for the height difference between the first light-emitting element 410 and the second light-emitting element 420 caused by the difference in light transmittance between the two, and further improve the surface flatness of the display panel.

[0067] Exemplarily, the thickness of the first reflective structure 510 may be less than the preset thickness corresponding to the maximum reflective capability of the material of the first reflective structure 510, and the thickness of the second reflective structure 520 may be greater than the preset thickness corresponding to the maximum reflective capability of the material of the second reflective structure 520. That is, when the thickness of the first reflective structure 510 is less than or equal to the preset thickness, at least part of the light incident on the surface of the first reflective structure 510 will pass through the first reflective structure 510 without being reflected. When the thickness of the second reflective structure 520 is greater than the preset thickness, the light incident on the surface of the second reflective structure 520 will not enter the interior of the second reflective structure 520. Therefore, when the thickness of the first reflective structure 510 is less than the preset thickness, by increasing the thickness of the second reflective structure 520, the amount of light absorbed by the second reflective structure 520 relative to the first reflective structure 510 can be reduced, and the amount of light reflected by the second reflective structure 520 can be increased, so that the height difference between the first light emitting element 410 and the second light emitting element 420 caused by the difference in light transmittance between the two can be further compensated, and the surface flatness of the display panel can be further improved.

[0068] As shown in FIG. 3 , in some embodiments, the orthographic projection of the bonding layer 300 toward the substrate 100 falls within the orthographic projection of the conductive reflective layer 500 toward the substrate 100 .

[0069] Exemplarily, the orthographic projection area of ​​the second reflective structure 520 toward the substrate 100 is greater than the orthographic projection area of ​​the first reflective structure 510 toward the substrate 100. The orthographic projection edge of the bonding layer 300 toward the substrate 100 coincides with the orthographic projection edge of the first reflective structure 510 toward the substrate 100, and the orthographic projection edge of the bonding layer 300 toward the substrate 100 falls within the orthographic projection edge of the second reflective structure 520 toward the substrate 100.

[0070] The display panel provided in the embodiment of the present application can increase the reflection area of ​​the conductive reflective layer 500, thereby saving the laser energy and bonding time required for laser bonding, and improving the production efficiency of the display panel. At the same time, it can also improve the stability of the conductive reflective layer 500, avoid the connection between the light-emitting element 400 and the bonding pad layer 200 from being broken, and further improve the stability and reliability of the display panel.

[0071] As shown in FIG. 2 , in some embodiments, the orthographic projection of the bonding layer 300 toward the substrate 100 coincides with the edge of the orthographic projection of the conductive reflective layer 500 toward the substrate 100 .

[0072] The display panel provided in the embodiment of the present application can prevent the distance between different reflective structures in the conductive reflective layer 500 from being too close, resulting in electrical connection between the different reflective structures, and further causing the corresponding light-emitting elements 400 to burn out or display abnormally, thereby reducing the risk of bad pixels of the display panel, improving the reliability and stability of the display panel, improving the safety of the display panel, extending the service life of the display panel, and improving the display effect of the display panel.

[0073] In some embodiments, the light transmittance of the first light emitting element 410 is the first light transmittance, the light transmittance of the second light emitting element 420 is the second light transmittance, and the first light transmittance is greater than the second light transmittance; in the thickness direction of the substrate 100, the thickness dimension of the first supporting structure 610 is positively correlated with the difference between the first light transmittance and the second light transmittance.

[0074] It should be noted that the difference between the first light transmittance and the second light transmittance can be used to reflect the height difference between the corresponding bonding layers 300 of the first light-emitting element 410 and the second light-emitting element 420 after melting and re-solidification in the absence of a conductive reflective layer 500. According to the above height difference, the thickness of the first supporting structure 610 can be determined to compensate for the height of the bonding layer 300 corresponding to the first light-emitting element 410.

[0075] The display panel provided in the embodiment of the present application can further improve the height compensation capability of the first supporting structure 610 , improve the surface flatness of the display panel, and improve the display effect of the display panel.

[0076] As shown in FIG1 , in some embodiments, the display panel further includes: a driving circuit layer 700. The driving circuit layer 700 is located between the bonding pad layer 200 and the substrate 100; the bonding pad layer 200 includes a first bonding pad structure 210 and a second bonding pad structure 220 arranged at intervals, the first bonding pad structure 210 is electrically connected to the first light-emitting element 410, and the first bonding pad structure 210 is located on a side of the first supporting structure 610 away from the substrate 100; the first supporting structure 610 has an opening, the second bonding pad structure 220 is located in the opening, and the second bonding pad structure 220 is electrically connected between the first light-emitting element 410 and the driving circuit layer 700 through the opening.

[0077] Exemplarily, the driving circuit layer 700 is located inside the substrate 100 .

[0078] The display panel provided in the embodiment of the present application can insulate the first bonding pad structure 210 from the driving circuit layer 700 through the first supporting structure 610, and can also electrically connect the second bonding pad structure 220 to the driving circuit layer 700 through the opening in the first supporting structure 610, so that the driving circuit layer 700 can drive the first light-emitting element 410 to emit light, thereby improving the display effect of the display panel.

[0079] As shown in FIG. 4 , in some embodiments, the support layer 600 further includes a second support structure 620 , which is located between the bonding pad 200 corresponding to the second light-emitting element 420 and the substrate 100 , and the thickness of the second support structure 620 is smaller than that of the first support structure 610 .

[0080] For example, the thickness difference between the first support structure 610 and the second support structure 620 may be determined according to the difference between the first light transmittance and the second light transmittance.

[0081] The display panel provided in the embodiment of the present application can further improve the surface flatness of the display panel, improve the display effect of the display panel, and improve the display performance of the display panel by setting the thickness of the second supporting structure 620 to be smaller than the thickness of the first supporting structure 610.

[0082] As shown in FIG. 5 , in some embodiments, the light-emitting element 400 further includes a third light-emitting element 430 , and the first light-emitting element 410 and the third light-emitting element 430 are light-emitting elements 400 of different colors; the conductive reflective layer 500 further includes a third reflective structure 530 , wherein the third reflective structure 530 corresponds to the third light-emitting element 430 , and the first reflective structure 510 is different from the third reflective structure 530 .

[0083] Exemplarily, the light color of the third light emitting element 430 may be one of blue and green. When the second light emitting element 420 and the third light emitting element 430 are different, their light transmittances are different, and correspondingly, the second reflective structure 520 and the third reflective structure 530 are also different, and their light reflectances are also different.

[0084] The display device provided by the embodiment of the present application, by setting a conductive reflective layer 500 between the bonding pad layer 200 and the bonding layer 300, the laser light emitted by the light-emitting element 400 can be reflected by the conductive reflective layer 500 to the bonding layer 300, thereby improving the utilization rate of the laser energy. Furthermore, by setting different reflective structures corresponding to the light-emitting elements 400 with different luminous colors, and adjusting the light reflection ability of the reflective structure according to the laser transmittance of different light-emitting elements 400, the laser transmittance of the light-emitting element 400 and the light reflection ability of the corresponding reflective structure can be balanced, so that under the same laser conditions, the melting state of the bonding layer 300 corresponding to different light-emitting elements 400 is consistent, and the height after melting is consistent. A supporting layer 600 can also be set on the side of the bonding pad layer 200 corresponding to the light-emitting element 400 with a large laser transmittance close to the substrate 100, so as to raise the light-emitting element 400 with a large laser transmittance, thereby compensating for the reduced thickness of the bonding layer 300 of the light-emitting element 400. Therefore, the ability to control the melting state of the bonding layer 300 during the preparation process can be improved, the height uniformity of different light-emitting elements 400 after bonding can be improved, and the surface flatness of the display panel can be further improved, thereby improving the display effect of the display panel.

[0085] As shown in Figure 6, in some embodiments, the display panel includes a first area A1 and a second area A2, the first area A1 is connected to the second area A2, the laser energy in the first area A1 is less than the laser energy in the second area A2; the reflectivity of the first reflective structure 510 in the first area A1 is greater than the reflectivity of the first reflective structure 510 in the second area A2, and the reflectivity of the second reflective structure 520 in the first area A1 is greater than the reflectivity of the second reflective structure 520 in the second area A2.

[0086] It should be noted that, during the laser bonding process of the light-emitting element 400, the light-emitting element 400 is usually first bonded on the transfer substrate, and then the light-emitting element 400 on the transfer substrate is transferred to the display panel. The display panel shown in FIG6 corresponds to a plurality of transfer substrates, one transfer substrate corresponds to a first area A1 and a second area A2, and the first area A1 surrounds the second area A2. For the first area A1 and the second area A2 on the same transfer substrate, since the laser source is usually set at the center of the chamber, the distance between the light-emitting element 400 and the laser source in the first area A1 is greater than that in the second area A2, so the laser energy in the first area A1 is less than the laser energy in the second area A2.

[0087] The display panel provided in the embodiment of the present application adjusts the reflection capabilities of the first reflection structure 510 and the second reflection structure 520 according to the absorption capabilities of different areas in the display panel to the laser emitted by the laser source, which can facilitate improving the height consistency of the light-emitting elements 400 at different positions in the display panel, thereby further improving the surface flatness of the display panel and improving the display effect and display performance of the display panel.

[0088] As shown in FIG. 7 , a second aspect of an embodiment of the present application provides a display device, including: a display panel 1000 as described in any one of the first aspects above.

[0089] The display device provided by the embodiment of the present application, by setting a conductive reflective layer 500 between the bonding pad layer 200 and the bonding layer 300, the laser light emitted by the light-emitting element 400 can be reflected by the conductive reflective layer 500 to the bonding layer 300, thereby improving the utilization rate of the laser energy. Furthermore, by setting different reflective structures corresponding to the light-emitting elements 400 with different luminous colors, and adjusting the light reflection ability of the reflective structure according to the laser transmittance of different light-emitting elements 400, the laser transmittance of the light-emitting element 400 and the light reflection ability of the corresponding reflective structure can be balanced, so that under the same laser conditions, the melting state of the bonding layer 300 corresponding to different light-emitting elements 400 is consistent, and the height after melting is consistent. A supporting layer 600 can also be set on the side of the bonding pad layer 200 corresponding to the light-emitting element 400 with a large laser transmittance close to the substrate 100, so as to raise the light-emitting element 400 with a large laser transmittance, thereby compensating for the reduced thickness of the bonding layer 300 of the light-emitting element 400. Therefore, the ability to control the melting state of the bonding layer 300 during the preparation process can be improved, the height uniformity of different light-emitting elements 400 after bonding can be improved, and the surface flatness of the display panel can be further improved, thereby improving the display effect of the display panel.

[0090] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0091] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features of the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: substrate; A bonding pad layer, located on one side of the substrate; A bonding layer, located on a side of the bonding pad layer away from the substrate; A light-emitting element is located on a side of the bonding layer away from the substrate, the light-emitting element comprises a first light-emitting element and a second light-emitting element, and the first light-emitting element and the second light-emitting element are light-emitting elements of different colors; a conductive reflective layer, located between the bonding pad layer and the bonding layer, the conductive reflective layer comprising a first reflective structure and a second reflective structure, wherein the first reflective structure corresponds to the first light-emitting element, the second reflective structure corresponds to the second light-emitting element, and the first reflective structure is different from the second reflective structure; and / or, A supporting layer, wherein the supporting layer at least comprises a first supporting structure, and the first supporting structure is located on a side of the bonding pad layer corresponding to the first light-emitting element close to the substrate.

2. The display panel according to claim 1, characterized in that: The emission wavelength of the first light emitting element is greater than the emission wavelength of the second light emitting element, and the reflectivity of the first reflective structure is less than the reflectivity of the second reflective structure.

3. The display panel according to claim 2, characterized in that: A reflectivity of a first reflective material included in the first reflective structure is lower than a reflectivity of a second reflective material included in the second reflective structure.

4. The display panel according to claim 3, characterized in that: The light transmittance of the first light emitting element is a first light transmittance, the light transmittance of the second light emitting element is a second light transmittance, and the first light transmittance is greater than the second light transmittance; The difference between the reflectivity of the first reflective material and the reflectivity of the second reflective material is positively correlated with the difference between the first light transmittance and the second light transmittance.

5. The display panel according to claim 2, characterized in that: The thickness of the first reflective structure is less than or equal to the thickness of the second reflective structure; and / or, An orthographic projection of the bonding layer toward the substrate falls within an orthographic projection of the conductive reflective layer toward the substrate.

6. The display panel according to claim 5, characterized in that: An orthographic projection of the bonding layer toward the substrate coincides with an edge of an orthographic projection of the conductive reflective layer toward the substrate.

7. The display panel according to claim 5, characterized in that: The light transmittance of the first light emitting element is a first light transmittance, the light transmittance of the second light emitting element is a second light transmittance, and the first light transmittance is greater than the second light transmittance; In the thickness direction of the substrate, the thickness dimension of the first supporting structure is positively correlated with the difference between the first light transmittance and the second light transmittance.

8. The display panel according to claim 1, characterized in that: Also includes: A driving circuit layer, located between the bonding pad layer and the substrate; The bonding pad layer comprises a first bonding pad structure and a second bonding pad structure which are arranged at intervals, the first bonding pad structure is electrically connected to the first light-emitting element, and the first bonding pad structure is located on a side of the first supporting structure away from the substrate; The first supporting structure has an opening, the second bonding pad structure is located in the opening, and the second bonding pad structure is electrically connected between the first light emitting element and the driving circuit layer through the opening.

9. The display panel according to claim 1, characterized in that: The support layer further includes a second support structure, which is located between the bonding pad layer corresponding to the second light-emitting element and the substrate, and the thickness of the second support structure is smaller than that of the first support structure.

10. The display panel according to claim 1, characterized in that: The light-emitting element further includes a third light-emitting element, and the first light-emitting element and the third light-emitting element are light-emitting elements of different colors; The conductive reflective layer further includes a third reflective structure, wherein the third reflective structure corresponds to the third light emitting element, and the first reflective structure is different from the third reflective structure.

11. The display panel according to claim 1, characterized in that: The display panel includes a first area and a second area, the first area is connected to the second area, and the laser energy in the first area is smaller than the laser energy in the second area; The reflectivity of the first reflective structure in the first region is greater than the reflectivity of the first reflective structure in the second region, and the reflectivity of the second reflective structure in the first region is greater than the reflectivity of the second reflective structure in the second region.

12. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 11.

Images