Light-emitting device and display device

Abstract

Provided in the present application are a light-emitting device and a display device. The light-emitting device comprises a driving substrate, light-emitting components, an optical diffusion layer, and a texture layer. The light-emitting components are located on at least one surface of the driving substrate; the optical diffusion layer is located on the surface of the driving substrate on which the light-emitting components are provided and covers the entirety of the light-emitting components; and the texture layer is located on the surface of the optical diffusion layer away from the driving substrate, the texture layer comprises a transparent base material layer and an ink layer which are stacked, a material of the ink layer comprises a reflective ink, and the ink layer forms a texture pattern on the surface of the transparent base material layer.

Description

Light-emitting device and display device

[0001] This application claims priority to Chinese Patent Application No. 202411357680.2, filed on September 26, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to, but is not limited to, the technical field of light-emitting devices, for example, to a light-emitting device and a display device. BACKGROUND

[0003] With the continuous development of micro light-emitting / sub-millimeter light-emitting diode (Mini / Micro LED, MLED) chip technology and the gradual reduction of the size of light-emitting chips, Chip on Board (COB) integrated packaging technology and Micro LED in Package (MIP) discrete device technology are gradually becoming mainstream packaging solutions for MLED applications in large-size display devices. The above technologies can achieve smaller point spacing and higher display brightness. SUMMARY

[0004] The following is a summary of the subject matter of the detailed description herein. This summary is not intended to limit the scope of the claims.

[0005] Embodiments of the present application provide a light-emitting device and a display device, which can achieve the screen-off hiding effect of the light-emitting device, and also will not affect the normal display effect when lit up.

[0006] In a first aspect, the present application provides a light-emitting device, comprising: a driving substrate, a light-emitting element, an optical diffusion layer, and a texture layer.

[0007] The light-emitting element is located on at least one surface of the driving substrate.

[0008] The optical diffusion layer is located on the surface of the driving substrate provided with the light-emitting element, and the optical diffusion layer covers the light-emitting element as a whole.

[0009] The texture layer is located on the surface of the optical diffusion layer away from the driving substrate, the texture layer comprises a transparent substrate layer and an ink layer stacked, the material of the ink layer comprises reflective ink, and the ink layer forms a texture pattern on the surface of the transparent substrate layer.

[0010] In some embodiments, the ink layer comprises a plurality of sub-texture portions, and the reflective ink of any two sub-texture portions is different in color.

[0011] In some embodiments, the reflective ink comprises the following components in mass fractions: 70-85 parts of a varnish, 5-10 parts of a first curing agent, 0.5-2 parts of carbon black, 1-4 parts of a toner, 0.5-1 part of a silicone, 1-2 parts of a dispersing agent, 1-2 parts of a leveling agent, 1-2 parts of an antifoaming agent, 1-2 parts of an adhesion agent, and 5-15 parts of a diluent.

[0012] In some embodiments, the thickness of the ink layer is 4-8 μm.

[0013] In some embodiments, the material of the first transparent substrate layer comprises at least one of PC, PET, PMMA, and PVC.

[0014] In some embodiments, the thickness of the first transparent substrate layer is 50-100 μm.

[0015] In some embodiments, the optical transmittance of the texture layer is 40-80%.

[0016] In some embodiments, the optical diffusion layer comprises a second transparent substrate layer and diffusion particles dispersed in the interior of the second transparent substrate layer.

[0017] The material of the second transparent substrate layer comprises at least one of modified epoxy resin, silicone resin, polyurethane, acrylic resin, and phenolic resin; and the diffusion particles comprise at least one of silicone, PS, PMMA, PBMA, TiO2, SiO2, Al2O3, MgO, and ZrO2.

[0018] In some embodiments, the particle size of the diffusion particles is 1-5 μm.

[0019] In some embodiments, the diffusion particles account for 0.5-5% of the second transparent substrate layer in mass percentage.

[0020] In some embodiments, the distance between the upper surface of the optical diffusion layer and the upper surface of the light-emitting element is 50-200 μm.

[0021] In some embodiments, the light-emitting device further comprises an adhesive layer disposed between the optical diffusion layer and the texture layer.

[0022] In some embodiments, the material of the adhesive layer comprises the following components in mass fractions: 34-68 parts of a resin, 10-20 parts of a second curing agent, 1-5 parts of fumed silica, 0.5-2 parts of a silane coupling agent, 0.5-2 parts of carbon black, and 10-20 parts of a first filler.

[0023] In some embodiments, the thickness of the adhesive layer is 5 μm to 20 μm.

[0024] In some embodiments, the optical transmittance of the adhesive layer is 85% to 90%.

[0025] In some embodiments, the resin comprises at least two of an epoxy resin, a silicone resin, and a methacrylic resin.

[0026] In some embodiments, the second curing agent comprises at least one of a polyphthalamide, a polyamide, and an aliphatic amine.

[0027] In some embodiments, the first filler comprises at least two of barium sulfate, calcium carbonate, mica powder, and silicon powder.

[0028] In some embodiments, the light emitting device further comprises an anti-reflection layer disposed on a surface of the textured layer away from the optical diffusion layer.

[0029] In some embodiments, the anti-reflection layer comprises a third transparent substrate layer and a second filler dispersed inside the third transparent substrate layer; the material of the third transparent substrate layer comprises modified polyurethane; and the second filler comprises at least one of TiO2, SiO2, Al2O3, MgO, and ZrO2.

[0030] In some embodiments, the thickness of the anti-reflection layer is 1 μm to 20 μm.

[0031] In some embodiments, the optical transmittance of the anti-reflection layer is 95% to 98%.

[0032] In some embodiments, the reflectivity of the anti-reflection layer is 1% to 4%.

[0033] In a second aspect, the embodiments of the present application further provide a display device comprising the light emitting device of any of the above embodiments.

[0034] In the embodiment of the present application, the light emitting device comprises an optical diffusion layer covering the light emitting element and a texture layer on the surface of the optical diffusion layer away from the driving substrate. The texture layer comprises a transparent substrate layer and an ink layer arranged in layers, the ink layer forms a texture pattern on the surface of the transparent substrate layer, and the material of the ink layer comprises reflective ink, which can make the surface of the light emitting device have special texture effect, weaken the original color difference of the light emitting device in the non-working state, and thus realize the effect of screen-off hiding of the light emitting device. Meanwhile, the texture layer does not affect the normal display effect of the light emitting device when the light emitting device is lighted. Meanwhile, the optical diffusion layer arranged on the light emitting element can not only improve the presentation definition of the texture layer in the screen-off state of the light emitting device, but also increase the light emitting uniformity of the light emitting device.

[0035] Other aspects can become apparent from the following description, which is given by way of example only. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 is a structural schematic diagram of a light emitting device according to an embodiment of the present application;

[0037] Fig. 2 is a sample control diagram according to Embodiment 1 of the present application; and

[0038] Fig. 3 is an optical transmittance diagram of the light emitting device according to Embodiment 1 of the present application.

[0039] Explanation of Reference Signs:

[0040] 10, driving substrate; 20, light emitting element; 30, optical diffusion layer; 31, diffusion particles; 40, adhesive layer; 41, filling particles; 50, texture layer; 60, anti-reflection layer; 61, protruding part. Embodiments of the present application

[0041] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, and thus the present application is not limited to the specific embodiments disclosed below.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0044] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the process of implementing the embodiments of the present disclosure, the applicant found that due to the color difference of the ink of the printed circuit board (PCB) substrate, the modularization of the LED display screen will be caused, that is, there will be color difference between different LED modules, resulting in the phenomenon of uneven light emission. The solutions include two types, one is to use a black film or glue material to add black to the LED lamp surface to weaken the color difference between the LED modules, and the other is to apply a layer of black ink between the LED chips to cover the color of the PCB substrate itself. However, the above conventional solutions are all in the form of blackening the LED light-emitting surface, which is difficult to realize the screen-off hiding effect of the LED display screen.

[0047] The embodiment of the present application provides a light-emitting device, which comprises a driving substrate 10, a light-emitting element 20, an optical diffusion layer 30 and a textured layer 50. The light-emitting element 20 is located on at least one surface of the driving substrate 10. The optical diffusion layer 30 is located on the surface of the driving substrate 10 provided with the light-emitting element 20, and the optical diffusion layer 30 covers the light-emitting element 20. The textured layer 50 is located on the surface of the optical diffusion layer 30 away from the driving substrate 10, and the textured layer 50 comprises a transparent substrate layer and an ink layer which are stacked, and the material of the ink layer comprises reflective ink, and the ink layer comprises a texture pattern on the surface of the transparent substrate layer.

[0048] The light-emitting device comprises the optical diffusion layer 30 covering the light-emitting element 20 and the textured layer 50 on the surface of the optical diffusion layer 30 away from the driving substrate 10. The textured layer 50 comprises the transparent substrate layer and the ink layer which are stacked, the ink layer forms the texture pattern on the surface of the transparent substrate layer, and the material of the ink layer comprises the reflective ink. Through the multi-layer film structure and the texture pattern formed by the ink layer, the surface of the light-emitting device can have a special texture effect, the original color difference of the light-emitting device in the non-working state can be weakened, and the effect of screen-off hiding of the light-emitting device is realized. Meanwhile, when the light-emitting device is lighted, the textured layer 50 does not affect the normal display effect of the light-emitting device. Meanwhile, the optical diffusion layer 30 arranged on the light-emitting element 20 can not only improve the presentation definition of the textured layer 50 in the screen-off state, but also further increase the light-emitting uniformity of the light-emitting device.

[0049] Compared with the conventional processing mode of blackening the light-emitting surface of the light-emitting device, the light-emitting device in the present application does not need to additionally blacken the light-emitting surface, ensures the display brightness of the device, and can realize high light-emitting uniformity of the light-emitting device without increasing the loss of blackness and the light-emitting rate.

[0050] In some embodiments, the optical diffusion layer 30 covers the surface of the light-emitting element 20 away from the driving substrate 10 and each side surface.

[0051] In some embodiments, the ink layer partially or entirely covers the surface of the transparent substrate layer.

[0052] In some embodiments, a plurality of light-emitting elements 20 are distributed on the surface of the driving substrate 10.

[0053] In some embodiments, the light-emitting element 20 comprises a light-emitting diode (LED) chip.

[0054] In some embodiments, the light-emitting element 20 comprises a Mini / Micro LED in Package (MIP) lamp bead.

[0055] In some embodiments, the ink layer is disposed on a surface of the transparent substrate layer distal from the optical diffusion layer 30.

[0056] It can be appreciated that by including the ink layer including the light-reflective ink including the texture pattern on the surface of the transparent substrate layer, the texture layer 50 can exhibit different natural textures. In some embodiments, the natural textures can be wood grain, marble grain, tile grain, water ripple, mottle, or other decorative textures.

[0057] In some embodiments, the ink layer includes a plurality of sub-texture portions, and a color of the light-reflective ink of any two of the sub-texture portions is different. By including the ink layer including a plurality of sub-texture portions and a color of the light-reflective ink of each of the sub-texture portions being different, a more complex texture of the texture layer 50 can be achieved to achieve a better screen-off hiding effect and light emission uniformity.

[0058] In some embodiments, the light-reflective ink includes the following components in the following mass fractions: 70-85 parts of the gloss oil, 5-10 parts of the first curing agent, 0.5-2 parts of the carbon black, 1-4 parts of the color powder, 0.5-1 part of the silicone, 1-2 parts of the dispersing agent, 1-2 parts of the leveling agent, 1-2 parts of the defoaming agent, 1-2 parts of the adhesion agent, and 5-15 parts of the diluent.

[0059] In some embodiments, the gloss oil can be in a mass fraction of 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, 77 parts, 78 parts, 79 parts, 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, or 85 parts. Alternatively, the mass fraction of the gloss oil can be within a range between any two of the above mass fractions.

[0060] In some embodiments, the first curing agent can be in a mass fraction of 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, or 10 parts. Alternatively, the mass fraction of the first curing agent can be within a range between any two of the above mass fractions.

[0061] In some embodiments, the carbon black can be in a mass fraction of 0.5 parts, 1 part, 1.5 parts, or 2 parts. Alternatively, the mass fraction of the carbon black can be within a range between any two of the above mass fractions.

[0062] In some embodiments, the color powder can be in a mass fraction of 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, or 4 parts. Alternatively, the mass fraction of the color powder can be within a range between any two of the above mass fractions. It can be appreciated that by replacing different color powders, the light-reflective ink can exhibit different colors. Exemplarily, the color of the light-reflective ink includes at least one of black, white, transparent red, transparent yellow, and transparent blue.

[0063] In some embodiments, the mass fraction of the organic silicon can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, or 1 part. Alternatively, the mass fraction of the organic silicon can also be within a range between any two mass fractions mentioned above.

[0064] In some embodiments, the mass fraction of the dispersant can be 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts. Alternatively, the mass fraction of the dispersant can also be within a range between any two mass fractions mentioned above.

[0065] In some embodiments, the mass fraction of the leveling agent can be 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts. Alternatively, the mass fraction of the leveling agent can also be within a range between any two mass fractions mentioned above.

[0066] In some embodiments, the mass fraction of the defoaming agent can be 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts. Alternatively, the mass fraction of the defoaming agent can also be within a range between any two mass fractions mentioned above.

[0067] In some embodiments, the mass fraction of the adhesion agent can be 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts. Alternatively, the mass fraction of the adhesion agent can also be within a range between any two mass fractions mentioned above.

[0068] In some embodiments, the mass fraction of the diluent can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, or 15 parts. Alternatively, the mass fraction of the diluent can also be within a range between any two mass fractions mentioned above.

[0069] In some embodiments, the thickness of the ink layer is 4 μm~8 μm.

[0070] In some embodiments, the thickness of the ink layer can be 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, or 8 μm. Alternatively, the thickness of the ink layer can also be within a range between any two thicknesses mentioned above.

[0071] In some embodiments, the material of the first transparent substrate layer can include at least one of polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), and polyvinyl chloride (PVC).

[0072] In some embodiments, the thickness of the first transparent substrate layer is 50 μm to 100 μm.

[0073] In some embodiments, the thickness of the first transparent substrate layer can be 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, or 100 μm. Alternatively, the thickness of the first transparent substrate layer can also be within a range between any two of the above thicknesses.

[0074] In some embodiments, the optical transmittance of the texture layer 50 is 40% to 80%.

[0075] In some embodiments, the optical transmittance of the texture layer 50 can be 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, or 80%. Alternatively, the optical transmittance of the texture layer 50 can also be within a range between any two of the above optical transmittances.

[0076] In some embodiments, the optical diffusion layer 30 includes a second transparent substrate layer and diffusion particles 31 dispersed within the second transparent substrate layer; the material of the second transparent substrate layer can include at least one of modified epoxy resin, silicone resin, polyurethane, acrylic resin, and phenolic resin; the diffusion particles 31 can include at least one of silicone, polystyrene (PS), PMMA, polybutyl methacrylate (PBMA), TiO2, SiO2, Al2O3, MgO, and ZrO2.

[0077] It can be understood that the material of the second transparent substrate layer can be a two-component thermosetting or one-component UV (ultraviolet) curing glue material.

[0078] In some embodiments, the particle size of the diffusion particles 31 is 1 μm to 5 μm.

[0079] In some embodiments, the particle size of the diffusion particles 31 can be 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, or 5 μm. Alternatively, the particle size of the diffusion particles 31 can also be within a range between any two of the above particle sizes.

[0080] In some embodiments, the mass percentage of the diffusion particles 31 in the second transparent substrate layer is 0.5% to 5%.

[0081] It can be understood that, within the range of the mass percentage of the diffusing particles 31 in the second transparent substrate layer, the optical diffusion layer 30 has a better effect of increasing the light emission uniformity. In some embodiments, the mass percentage of the diffusing particles 31 in the second transparent substrate layer can be 0.5%, 0.8%, 1%, 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.5%, 2.8%, 3%, 3.2%, 3.5%, 3.8%, 4%, 4.2%, 4.5%, 4.8%, or 5%. Alternatively, the mass percentage of the diffusing particles 31 in the second transparent substrate layer can also be within the range between any two of the above mass percentages.

[0082] In some embodiments, the distance between the surface of the optical diffusion layer 30 away from the driving substrate 10 and the surface of the light emitting element 20 away from the driving substrate 10 can be 50 μm~200 μm.

[0083] In some embodiments, the distance between the surface of the optical diffusion layer 30 away from the driving substrate 10 and the surface of the light emitting element 20 away from the driving substrate 10 can be 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, or 200 μm. Alternatively, the distance between the surface of the optical diffusion layer 30 away from the driving substrate 10 and the surface of the light emitting element 20 away from the driving substrate 10 can also be within the range between any two of the above distances.

[0084] In some embodiments, the light emitting device further comprises an adhesive layer 40, which is arranged between the optical diffusion layer 30 and the textured layer 50.

[0085] It can be understood that, by arranging the adhesive layer 40 between the optical diffusion layer 30 and the textured layer 50, the adhesion of the textured layer 50 on the surface of the optical diffusion layer 30 can be increased. Meanwhile, the adhesive layer 40 of the present application also has a water and moisture blocking effect, which can improve the weather resistance of the light emitting device in a natural environment.

[0086] In some embodiments, the material of the adhesive layer 40 comprises the following components in the following mass fractions: 34 parts~68 parts of resin, 10 parts~20 parts of a second curing agent, 1 part~5 parts of fumed silica, 0.5 parts~2 parts of a silane coupling agent, 0.5 parts~2 parts of carbon black, and 10 parts~20 parts of a first filler 41.

[0087] In some embodiments, the resin can have a mass fraction of 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, 62 parts, 64 parts, 66 parts, or 68 parts. Alternatively, the resin can have a mass fraction in a range between any two of the above-mentioned mass fractions.

[0088] In some embodiments, the second curing agent can have a mass fraction of 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, or 20 parts. Alternatively, the second curing agent can have a mass fraction in a range between any two of the above-mentioned mass fractions.

[0089] In some embodiments, the fumed silica can have a mass fraction of 1 part, 2 parts, 3 parts, 4 parts, or 5 parts. Alternatively, the fumed silica can have a mass fraction in a range between any two of the above-mentioned mass fractions.

[0090] In some embodiments, the silane coupling agent can have a mass fraction of 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts. Alternatively, the silane coupling agent can have a mass fraction in a range between any two of the above-mentioned mass fractions.

[0091] In some embodiments, the carbon black can have a mass fraction of 0.5 parts, 1 part, 1.5 parts, or 2 parts. Alternatively, the carbon black can have a mass fraction in a range between any two of the above-mentioned mass fractions.

[0092] In some embodiments, the first filler 41 can have a mass fraction of 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, or 20 parts. Alternatively, the first filler 41 can have a mass fraction in a range between any two of the above-mentioned mass fractions.

[0093] In some embodiments, the adhesive layer 40 has a thickness of 5 μm to 20 μm.

[0094] In some embodiments, the adhesive layer 40 can have a thickness of 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, or 20 μm. Alternatively, the adhesive layer 40 can have a thickness in a range between any two of the above-mentioned thicknesses.

[0095] In some embodiments, the optical transmittance of the adhesive layer 40 can be 85% to 90%.

[0096] In some embodiments, the optical transmittance of the adhesive layer 40 can be 85%, 86%, 87%, 88%, 89% or 90%. Alternatively, the optical transmittance of the adhesive layer 40 can also be within a range between any two of the above optical transmittances.

[0097] In some embodiments, the resin can include at least two of an epoxy resin, a silicone resin and a methacrylic resin.

[0098] In some embodiments, the second curing agent can include at least one of a polyphthalamide, a polyamide and an aliphatic amine.

[0099] In some embodiments, the first filler 41 can include at least two of barium sulfate, calcium carbonate, mica powder and silicon powder.

[0100] In some embodiments, the light emitting device further includes an anti-reflection layer 60, which is disposed on a surface of the textured layer 50 away from the optical diffusion layer 30.

[0101] It can be understood that the anti-reflection layer 60 can improve the weather resistance of the textured layer 50 while achieving the anti-glare effect of the light emitting device, further improving the textured presentation effect of the textured layer 50 in the off-screen state.

[0102] In some embodiments, the anti-reflection layer 60 includes a third transparent substrate layer and a second filler, the second filler being dispersed inside the third transparent substrate layer; the material of the third transparent substrate layer includes modified polyurethane; and the second filler can include at least one of TiO2, SiO2, Al2O3, MgO and ZrO2.

[0103] In some embodiments, the thickness of the anti-reflection layer 60 can be 1 μm to 20 μm.

[0104] In some embodiments, the thickness of the anti-reflection layer 60 can be 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm or 20 μm. Alternatively, the thickness of the anti-reflection layer 60 can also be within a range between any two of the above thicknesses.

[0105] In some embodiments, the optical transmittance of the anti-reflection layer 60 can be 95% to 98%.

[0106] In some embodiments, the optical transmittance of the anti-reflective layer 60 is 95%, 96%, 97% or 98%. Alternatively, the optical transmittance of the anti-reflective layer 60 can also be within a range between any two of the above optical transmittances.

[0107] In some embodiments, the reflectance of the anti-reflective layer 60 is 1% to 4%.

[0108] In some embodiments, the reflectance of the anti-reflective layer 60 can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5% or 4%. Alternatively, the reflectance of the anti-reflective layer 60 can also be within a range between any two of the above reflectances.

[0109] It can be understood that each of the above curing agents can be selected according to the corresponding resin and is a common curing agent in the art.

[0110] In some embodiments, the optical diffusion layer 30, the adhesive layer 40, the texture layer 50 and the anti-reflective layer 60 in the light-emitting device form a composite film layer, and the optical transmittance of the composite film layer is 13% to 60%.

[0111] In some embodiments, the optical transmittance of the composite film layer can be 13%, 15%, 18%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55% or 60%. Alternatively, the optical transmittance of the composite film layer can also be within a range between any two of the above optical transmittances.

[0112] In some embodiments, the anti-reflective layer 60 is provided with a protruding portion 61 on a surface thereof away from the texture layer 50, and the protruding portion 61 protrudes from the surface of the anti-reflective layer 60 away from the texture layer 50. The protruding portion 61 can further enhance the anti-reflective effect.

[0113] The application also provides a preparation method of the light-emitting device according to any one of the above embodiments, which comprises the following steps:

[0114] providing a substrate, the substrate comprising a driving substrate 10 and a light-emitting element 20 provided on at least one surface of the driving substrate 10;

[0115] forming an optical diffusion layer 30 on the surface of the driving substrate 10 on which the light-emitting element 20 is provided, the scattering layer entirely covering the light-emitting element 20; and

[0116] forming a texture layer 50 on a surface of the optical diffusion layer 30 away from the driving substrate 10, the texture layer 50 comprising a transparent substrate layer and an ink layer stacked, the material of the ink layer comprising a reflective ink, and the ink layer forming a texture pattern on the surface of the transparent substrate layer.

[0117] In some embodiments, the optical diffusion layer 30 is prepared by hot pressing, plating, spraying or printing.

[0118] In some embodiments, forming the texture layer 50 on the surface of the optical diffusion layer 30 away from the driving substrate 10 comprises the following steps:

[0119] The ink layer is prepared on the surface of the transparent substrate layer by multiple times of screen printing, and each time of screen printing prints one sub-texture part.

[0120] In some embodiments, the screen mesh number of each time of screen printing is 200-400.

[0121] In some embodiments, the screen mesh number of each time of screen printing can be 200, 220, 240, 260, 280, 300, 320, 340, 360, 380 or 400. Alternatively, the screen mesh number of each time of screen printing can also be within a range between any two of the above screen mesh numbers.

[0122] In some embodiments, the screen film thickness of each time of screen printing is 8-12 μm.

[0123] In some embodiments, the screen film thickness of each time of screen printing can be 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5 or 12 μm. Alternatively, the screen film thickness of each time of screen printing can also be within a range between any two of the above film thicknesses.

[0124] In some embodiments, the reflective ink of the sub-texture part is dried after each time of screen printing.

[0125] In some embodiments, the drying temperature is 60-80℃.

[0126] In some embodiments, the drying temperature can be 60, 62, 64, 66, 68, 70, 72, 74, 76, 78 or 80℃. Alternatively, the drying temperature can also be within a range between any two of the above temperatures.

[0127] In some embodiments, the drying time is 10-20 min.

[0128] In some embodiments, the drying time can be 10, 12, 14, 16, 18 or 20 min. Alternatively, the drying time can also be within a range between any two of the above times.

[0129] In some embodiments, before forming the texture layer 50 on the surface of the optical diffusion layer 30 away from the driving substrate 10, the following steps are further included:

[0130] A glue layer is formed on the surface of the optical diffusion layer 30 away from the driving substrate 10.

[0131] In some embodiments, the glue layer is prepared by spraying, brushing or dipping.

[0132] In some embodiments, a reduction layer 60 is further formed on the surface of the texture layer 50 away from the optical diffusion layer 30.

[0133] In some embodiments, the reduction layer 60 is prepared by pasting, evaporation, spraying, vacuum plating, sol-gel method or chemical vapor deposition.

[0134] The application also provides a display device comprising the light-emitting device of any of the above embodiments or the light-emitting device prepared by the preparation method of any of the above embodiments.

[0135] The following is an embodiment

[0136] The preparation method of the light-emitting device provided by the application comprises the following steps:

[0137] (1) Pretreatment: providing a MIP patch lamp panel or a MLED die bonding lamp panel with a process edge MIP, without integrated packaging treatment on the lamp surface, and performing plasma cleaning treatment on the LED module light-emitting surface.

[0138] (2) Preparing optical diffusion layer 30 glue: providing an epoxy resin A glue, including 40-60 parts of epoxy resin, 4-6 parts of epoxy modified acrylic resin, 4-6 parts of silicone powder, 10-20 parts of diluent, 10-20 parts of diffusion particles 31 and 1-10 parts of toughening agent. Providing an epoxy resin B glue, containing 80-90 parts of acid anhydride and 10-20 parts of heat curing accelerator. Mix and stir the epoxy resin A glue and the epoxy resin B glue respectively and stand.

[0139] (3) Preparing optical diffusion layer 30: providing a release film with matte roughness and a film pressing device, mixing the epoxy resin A glue and the epoxy resin B glue uniformly according to the proportion, pouring the glue on the surface of the release film, pressing the LED lamp panel light-emitting surface downward on the glue surface, using vacuum degassing + 120℃ heating and curing for 5-10 minutes, demolding the LED lamp panel for standby, and the film thickness of the optical diffusion layer 30 is 220 μm.

[0140] (4) Making the reflective ink: the reflective ink includes 85 parts to 95 parts of Seiko CAV transparent (F) YS series as the base varnish, 1 part to 4 parts of different color toner, 0.5 parts to 1 part of silicone powder, 1 part to 2 parts of high molecular dispersant, 1 part to 2 parts of leveling agent, 1 part to 2 parts of defoaming agent, 1 part to 2 parts of acrylic adhesion agent and 4 parts to 8 parts of diluent, which are stirred uniformly by a stirring barrel to obtain the reflective ink with a viscosity of 6000 Mpa.s. Different color reflective inks including black, white, red and yellow inks are realized by doping different color toners.

[0141] (5) Making the texture film: a transparent PC film with a thickness of 100 μm is provided as the first transparent substrate layer, a silk screen printing process is adopted, the silk screen mesh number is 300 meshes, the screen film thickness is 8 μm to 12 μm, the drying temperature is 80°C, the ink layers are printed in the order of black-red-white-yellow, the drying time is 30 minutes each time, the thickness of the single layer ink after curing is 4 μm to 8 μm, and the required wood grain texture is formed.

[0142] (6) Making the anti-reflection layer 60: the ultraviolet absorber is dispersed on the surface of the fumed SiO2 with a particle size of 1 μm to 5 μm, and the modified polyurethane is added to obtain the anti-reflection and anti-fouling glue, which is coated on the surface of the texture film by the atomization spraying process, the spraying thickness is about 4 μm, the tunnel furnace is heated at 80°C for 20 minutes, and the glue is completely cured after standing for 12 hours to 24 hours.

[0143] (7) Preparing the adhesive layer glue: the adhesive layer glue includes 30 parts to 60 parts of epoxy resin, 10 parts to 20 parts of curing agent, 4 parts to 8 parts of methacrylic acid resin, 1 part to 5 parts of fumed silica, 0.5 parts to 2 parts of silane coupling agent, 10 parts to 20 parts of mica powder, barium sulfate and 20 parts to 40 parts of propylene glycol solvent, which are mixed and stirred uniformly, and then atomized and sprayed on the surface of the optical diffusion layer 30, the spraying thickness is 5 μm.

[0144] (8) Bonding the film material: the texture film is pressed and combined with the optical diffusion layer 30 by a debubbling roller, the light surface is placed on a flat surface with the back under load, and the vacuum debubbling and curing is carried out in a vacuum oven at 80°C for 10 minutes.

[0145] (9) Edge cutting and splicing: the process edge of the LED module is cut by a scribe machine.

[0146] Referring to FIG. 2, FIG. 2 is a sample control diagram provided by the embodiment 1 of the present application, the lower half of FIG. 2 is the sample prepared by the embodiment 1 of the present application, and the upper half of FIG. 2 is a conventional blackened sample diagram. It can be seen that the sample prepared by the embodiment 1 has a natural texture on the surface. Referring to FIG. 3, the optical transmittance of the composite film composed of the film layers in the sample in the embodiment 1 is between 46% and 51% in the visible light range, the light output rate is relatively consistent, and it is proved that the composite film has a small influence on the bright screen display picture. The light emitting device of the present application can realize the screen-off hiding effect of the light emitting device, and will not affect the normal display effect when lighting, and meanwhile, on the premise of not increasing the blackness loss and light output rate, a high LED light output uniformity is realized.

[0147] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0148] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, several modifications 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 patent protection scope of the present application should be subject to the appended claims, and the description and drawings can be used to explain the content of the claims.

Claims

1. A light emitting device, comprising: a driving substrate; a light emitting element on at least one surface of the driving substrate; an optical diffusion layer on a surface of the driving substrate provided with the light emitting element, and the optical diffusion layer covering the light emitting element; and a texture layer on a surface of the optical diffusion layer away from the driving substrate, the texture layer comprising a transparent substrate layer and an ink layer stacked, a material of the ink layer comprising a reflective ink, and the ink layer forming a texture pattern on a surface of the transparent substrate layer. The ink layer comprises a plurality of sub-texture portions, and a color of the reflective ink of any two of the sub-texture portions is different.

2. The light-emitting device according to claim 1, wherein The reflective ink comprises components in the following mass fractions: 70-85 parts of a varnish, 5-10 parts of a first curing agent, 0.5-2 parts of carbon black, 1-4 parts of toner, 0.5-1 part of silicone, 1-2 parts of a dispersing agent, 1-2 parts of a leveling agent, 1-2 parts of an antifoaming agent, 1-2 parts of an adhesion agent, and 5-15 parts of a diluent.

3. The light emitting device according to claim 1 or 2, wherein The ink layer has a thickness of 4-8 μm. The first transparent substrate layer comprises at least one of polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), and polyvinyl chloride (PVC). The first transparent substrate layer has a thickness of 50-200 μm. The texture layer has an optical transmittance of 40-80%. The optical diffusion layer comprises a second transparent substrate layer and diffusion particles dispersed in an interior of the second transparent substrate layer. The second transparent substrate layer comprises at least one of modified epoxy resin, silicone resin, polyurethane, acrylic resin, and phenolic resin. The diffusion particles comprise at least one of silicone, polystyrene (PS), PMMA, polybutyl methacrylate (PBMA), TiO2, SiO2, Al2O3, MgO, and ZrO2.

4. A light emitting device according to any of claims 1-3, wherein The diffusion particles have a particle size of 1-5 μm. The diffusion particles have a mass percentage of 0.5-5% in the second transparent substrate layer.

5. The light emitting device of claim 4, wherein, A distance between a surface of the optical diffusion layer away from the driving substrate and a surface of the light emitting element away from the driving substrate is 50-200 μm. 7.The light emitting device according to any one of claims 1-6, further comprising:

6. A light-emitting device according to any one of claims 1-5, wherein an adhesive layer disposed between the optical diffusion layer and the texture layer. The adhesive layer comprises components in the following mass fractions: 34-68 parts of a resin, 10-20 parts of a second curing agent, 1-5 parts of fumed silica, 0.5-2 parts of a silane coupling agent, 0.5-2 parts of carbon black, and 10-20 parts of a first filler. The adhesive layer has a thickness of 5-20 μm.

8. The light-emitting device according to claim 7, wherein The adhesive layer has an optical transmittance of 85-90%. The resin comprises at least two of epoxy resin, silicone resin, and methacrylic resin. ​ 9. The light-emitting device according to claim 8, wherein ​ The second curing agent comprises at least one of polyphthalamide, polyamide and fatty amine; and / or, The first filler comprises at least two of barium sulfate, calcium carbonate, mica powder and silicon powder.

10. The light emitting device according to any one of claims 1-9, further comprising: an anti-reflection layer disposed on a surface of the textured layer away from the optical diffusion layer.

11. The light-emitting device according to claim 10, wherein The anti-reflection layer comprises: a third transparent substrate layer; and a second filler dispersed in an interior of the third transparent substrate layer; a material of the third transparent substrate layer comprises modified polyurethane, and the second filler comprises at least one of TiO2, SiO2, Al2O3, MgO and ZrO2.

12. The light-emitting device according to claim 10 or 11, wherein The anti-reflection layer has a thickness of 1-20 μm; and / or, The anti-reflection layer has an optical transmittance of 95-98%; and / or, The anti-reflection layer has a reflectivity of 1-4%.

13. A display device comprising the light emitting device according to any one of claims 1-12.

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