Light-emitting substrate and display device

Abstract

The application provides a light-emitting substrate and a display device, and relates to the technical field of display. The color conversion layer and the light guide column are arranged in the groove structure of the base of the light-emitting substrate. The color conversion layer can perform color conversion on the light emitted by the light-emitting area. The light guide column is used for transmitting a part of the color-converted light, so that the color-converted light is output through the position opposite to the first area of the groove structure of the base. The reflection structure of the light-emitting substrate is used for reflecting another part of the color-converted light to the first reflection layer. The first reflection layer is used for reflecting the received color-converted light to the area of the base opposite to the first reflection layer. In this way, the light is output at the position opposite to the first area of the groove structure of the base (i.e. the central area of the base), and the light is output at the area of the base opposite to the first reflection layer (i.e. the area on both sides of the central area of the base). In the case that the display device is ultra-thin, the light-emitting substrate can uniformly output light from the light-emitting area.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a light-emitting substrate and a display device. Background Technology

[0002] With the advancement of technology, display technology is also developing rapidly. Among the various aspects, the thinness and lightness of a display device is one indicator of its quality. Currently, a type of display device, such as... Figure 1 As shown, in order to make the display device ultra-thin, a groove can be formed in the substrate of the light-emitting substrate (i.e., backlight structure) of the display device, and a second reflective layer and a color conversion layer are stacked in the groove. In addition, a first reflective layer is provided on both sides of the substrate located in the groove, and multiple light-emitting openings are provided on the first reflective layer facing the groove. A light-emitting component is provided on the side of the first reflective layer away from the substrate.

[0003] The light-emitting principle of this light-emitting substrate is as follows: Figure 1 As shown, light emitted by the light-emitting component 109 passes through the light-emitting opening 115 to the color-converting layer 105. The color-converting layer 105 converts the color of the light and reflects it back to the first reflective layer 109 from the second reflective layer 106. The light is then output from the regions of the substrate 101 located on both sides of the groove structure by the first reflective layer 109. This results in no light output from the region of the substrate 101 located in the groove structure 102. Furthermore, as... Figure 2 As shown, this results in a black area 203 appearing in the center of the light-emitting area 201 of the light-emitting substrate, i.e., uneven light emission. Therefore, in the current case of ultra-thin display devices, it is not possible to ensure uniform light emission from the light-emitting area of ​​the light-emitting substrate. Summary of the Invention

[0004] This application provides a light-emitting substrate, a display device, and a method for preparing the light-emitting substrate, which solves the problem in the prior art that it is impossible to ensure uniform light emission from the light-emitting area of ​​the display device when the display device is ultra-thin.

[0005] In a first aspect, this application also provides a light-emitting substrate, comprising:

[0006] The base has a groove structure on one side. The bottom of the groove structure includes a first region and a second region. The orthographic projection of the first region on the base is located within the orthographic projection of the second region on the base.

[0007] The first reflective layer is disposed around the groove structure on the substrate and forms a light-emitting opening, and the orthographic projection of the light-emitting opening on the substrate is located within the orthographic projection of the groove structure on the substrate.

[0008] Multiple light-emitting components are arranged in an array on the side of the first reflective layer away from the substrate, and the light-emitting area of ​​each light-emitting component corresponds to a light-emitting opening;

[0009] The color conversion layer is disposed in the groove structure, and a projection of the light-out opening on the substrate overlaps with a projection of the first region of the groove structure on the substrate.

[0010] The light-emitting substrate further comprises a reflective structure and a light guide column, both of which are disposed in the groove structure, and a projection of the light guide column on the substrate overlaps with a projection of the first region of the groove structure on the substrate; a projection of the reflective structure on the substrate overlaps with a projection of the first region of the groove structure on the substrate.

[0011] In a possible implementation, the reflective structure is a second reflective layer, the second reflective layer covers a side of the groove structure close to the color conversion layer; an extension direction of a cross section of the light guide column is perpendicular to the light-emitting component, one end of the light guide column is in contact with the groove structure, and a projection of the light guide column on the substrate is located within a projection of the first region of the groove structure on the substrate.

[0012] In a possible implementation, the number of the light guide columns is a plurality, the plurality of light guide columns are arranged at intervals, and one end of each light guide column passes through the second reflective layer and is in contact with the groove structure.

[0013] In a possible implementation, the groove structure comprises a first groove and a second groove, both of which are arc-shaped grooves, one side of the first groove and one side of the second groove are connected, and the second reflective layer covers positions of the first groove and the second groove in the first region.

[0014] In a possible implementation, the reflective structure is a second reflective layer, the light guide column is disposed in the groove structure, an extension direction of a cross section of the light guide column is inclined toward a direction parallel to the light-emitting component, a projection of the light guide column on the substrate does not completely overlap with a projection of the second reflective layer on the substrate, and a projection of the first reflective layer on the substrate partially overlaps with a projection of the light guide column on the substrate.

[0015] In a possible implementation, the number of the light guide columns is a plurality, the plurality of light guide columns are arranged at intervals, and a distance between two adjacent light guide columns is greater than 2 μm and less than 4 μm.

[0016] In a possible implementation, the groove structure comprises a first groove and a second groove, both of which are arc-shaped grooves, one side of the first groove and one side of the second groove are connected, and the second reflective layer covers positions of the first groove and the second groove in the first region.

[0017] In a possible implementation, the refractive index of the light guide column is greater than the refractive index of the color conversion layer, and the difference between the refractive index of the light guide column and the refractive index of the color conversion layer is greater than 0.5.

[0018] In a possible implementation, the reflective structure is a scattering layer, the color conversion layer is provided with a through hole at a position opposite the first region of the groove structure, the light guide column is located in the through hole, and the light guide column is spaced apart from the inner wall of the through hole to form a hollow opening, the scattering layer is arranged on the side of the light guide column close to the substrate and in the hollow opening, and the light guide column has a color conversion function.

[0019] In a possible implementation, the concentration of the quantum dot material in the light guide column is lower than the concentration of the quantum dot material in the color conversion layer.

[0020] In a possible implementation, the scattering layer includes a plurality of reflective particles and a light guide layer, and the plurality of reflective particles are distributed in the light guide layer.

[0021] In a possible implementation, the reflective structure and the light guide column are both scattering layers, the color conversion layer is provided with a through hole at a position opposite the first region of the groove structure, and the scattering layer is filled in the through hole.

[0022] The scattering layer includes a first scattering region in the shape of a circular truncated cone and a second scattering region in the shape of a circular truncated cone, the smaller-diameter bottom surface of the first scattering region is in contact with the smaller-diameter bottom surface of the second scattering region, and the second scattering region is closer to the substrate than the first scattering region.

[0023] In a possible implementation, the scattering layer includes a plurality of reflective particles and a light guide layer, and the plurality of reflective particles are distributed in the light guide layer.

[0024] In a possible implementation, the scattering layer has a height perpendicular to the substrate greater than 25 μm and less than 150 μm.

[0025] In a possible implementation, the light-emitting substrate further includes a plurality of spaced-apart condenser lenses, and the plurality of spaced-apart condenser lenses are arranged on the side of the first reflective layer close to the substrate.

[0026] In a possible implementation, the light-emitting substrate further includes a nano optical fiber structure layer, and the nano optical fiber structure layer is arranged on the side of the first reflective layer close to the substrate, wherein the nano optical fiber structure layer includes a plurality of U-shaped nano optical fibers and a low-refraction material layer filled in the gaps of the plurality of U-shaped nano optical fibers, each U-shaped nano optical fiber has an opening facing the substrate, the refractive index of the U-shaped nano optical fiber is greater than the refractive index of the low-refraction material layer, and the difference between the refractive index of the U-shaped nano optical fiber and the refractive index of the low-refraction material layer is greater than 0.5.

[0027] In a second aspect, the present application provides a display device, including a display panel and the light-emitting substrate of the first aspect of the present application, and the light-emitting substrate is used to provide backlight for the display panel.

[0028] The light-emitting substrate and the display device provided by the present application can set the color conversion layer in the groove structure of the substrate, and the groove bottom of the groove structure comprises a first area and a second area, the orthographic projection of the first area on the substrate is located in the orthographic projection of the second area on the substrate. Therefore, the first area is located in the central area of the groove structure. Since the orthographic projection of the light-emitting opening on the substrate overlaps the orthographic projection of the first area on the substrate, the light-emitting opening corresponds to the central area of the groove structure. Moreover, the light-emitting substrate further comprises a reflecting structure and a light guide column, both of which are located in the groove structure, the orthographic projection of the light guide column on the substrate overlaps the orthographic projection of the first area of the groove structure on the substrate, and the orthographic projection of the reflecting structure on the substrate overlaps the orthographic projection of the first area of the groove structure on the substrate.

[0029] In this way, the light guide column is used to transmit part of the light converted by the color conversion layer, so that the light converted is uniformly output at the position directly opposite the light-emitting opening of the substrate (i.e. the central area of the substrate), the reflecting structure is used to reflect another part of the light converted to the first reflecting layer, and the first reflecting layer is used to reflect the received light converted to the area of the substrate directly opposite the first reflecting layer (i.e. the area on both sides of the central area of the substrate). Thus, there is no black area in the middle and on both sides of the light-emitting area of the light-emitting substrate. In this way, the light-emitting substrate can uniformly emit light in the light-emitting area while being thin. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 It is a sectional view of the present light-emitting substrate;

[0032] Figure 2 It is a light distribution diagram of the light-emitting area of the present light-emitting substrate;

[0033] Figure 3 It is one of the sectional views of the light-emitting substrate provided by the embodiments of the present application;

[0034] Figure 4 It is one of the top views of the light-emitting substrate provided by the embodiments of the present application;

[0035] Figure 5 It is the second sectional view of the light-emitting substrate provided by the embodiments of the present application;

[0036] Figure 6A second top view of the light-emitting substrate provided in an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the specific structure of the scattering layer provided in the embodiments of this application;

[0038] Figure 8 A third cross-sectional view of the light-emitting substrate provided in the embodiments of this application;

[0039] Figure 9 Third top view of the light-emitting substrate provided in the embodiments of this application;

[0040] Figure 10 Fourth cross-sectional view of the light-emitting substrate provided in the embodiments of this application;

[0041] Figure 11 Fourth top view of the light-emitting substrate provided in the embodiments of this application;

[0042] Figure 12 Fifth cross-sectional view of the light-emitting substrate provided in the embodiments of this application;

[0043] Figure 13 Fifth top view of the light-emitting substrate provided in the embodiments of this application. Detailed Implementation

[0044] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0045] The accompanying drawings illustrate various structural schematics according to embodiments of the present disclosure. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0046] In the context of this disclosure, when a layer / element is referred to as being "above" another layer / element, the layer / element may be directly above the other layer / element, or there may be an intermediate layer / element between them. Additionally, if a layer / element is "above" another layer / element in one orientation, then when the orientation is reversed, the layer / element may be "below" the other layer / element.

[0047] The light-emitting principle of the current display device's light-emitting substrate is as follows: Figure 1As shown, the light-emitting assembly emits light through the light-emitting opening to the color conversion layer, the color conversion layer converts the color of the light and reflects the light back to the first reflective layer from the reflective structure. Then the light is output from the first reflective layer to the area of the substrate located on both sides of the groove. In this way, the area of the substrate in the groove has no light output. Further, as shown, a black spot appears in the center of the light-emitting area of the light-emitting substrate, i.e., the light-emitting area is not uniform, and therefore, in the case of a thin display device, it is difficult to make the light-emitting area of the light-emitting substrate emit light uniformly. Figure 2 As shown, a black spot appears in the center of the light-emitting area of the light-emitting substrate, i.e., the light-emitting area is not uniform, and therefore, in the case of a thin display device, it is difficult to make the light-emitting area of the light-emitting substrate emit light uniformly.

[0048] Based on the above technical problems, the present application provides a light-emitting substrate, which comprises a substrate, a color conversion layer, a reflective structure, a first reflective layer, and a light-emitting assembly. The color conversion layer is embedded in the color conversion layer of the light-emitting substrate, and the color conversion layer is configured to convert the color of the light emitted by the light-emitting area. The light-emitting assembly is configured to emit light through the light-emitting opening to the color conversion layer, and the color conversion layer is configured to convert the color of the light and reflect the light back to the first reflective layer from the reflective structure. The first reflective layer is configured to reflect the received color-converted light to the area of the substrate opposite the first reflective layer. In this way, the area of the substrate opposite the first reflective layer (i.e., the central area of the substrate) and the area of the substrate opposite the first reflective layer (i.e., the area located on both sides of the central area of the substrate) have light output. Thus, the middle and both sides of the light-emitting area of the light-emitting substrate do not have black areas. In this way, in the case of a thin display device, the light-emitting area of the light-emitting substrate can emit light uniformly.

[0049] The technical solutions of the present application and how the technical solutions solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0050] Please refer to Figure 3 and Figure 4 The present application provides a light-emitting substrate, which comprises a substrate, a color conversion layer, a reflective structure, a first reflective layer, and a light-emitting assembly.

[0051] The substrate 101 is provided with a groove structure 102 on one side. The groove bottom of the groove structure 102 comprises a first area and a second area, and the orthographic projection of the first area on the substrate 101 is located within the orthographic projection of the second area on the substrate 101. That is, the first area is located in the center of the groove structure 102, and the second area is located at the edge of the groove structure 102. In addition, the first reflective layer 109 is provided with a light-emitting opening 115.

[0052] The substrate 101 can include glass, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), colorless polyimide (CPI), or the like. Understandably, the substrate 101 has a light transmittance greater than 90% for light guiding.

[0053] It should be noted that the substrate 101 can be a single-layer structure or a multi-layer structure. For example, the substrate 101 can include a glass substrate, or the substrate 101 can include at least one flexible substrate and at least one buffer layer, and the flexible substrate and the buffer layer are alternately stacked, which is not limited by the embodiments of the present application.

[0054] In some embodiments, the refractive index of the substrate 101 can range from 1.5 to 1.6, and the substrate 101 has a certain impact resistance. In some embodiments, the opening width of the groove structure 102 can range from 50 μm to 1000 μm, and the depth of the groove structure 102 can range from 50 μm to 300 μm.

[0055] The first reflective layer 109 is arranged around the groove structure 102 on the substrate 101 and forms a light emitting opening 115, and the orthographic projection of the light emitting opening 115 on the substrate 101 is located within the orthographic projection of the groove structure 102 on the substrate 101.

[0056] The first reflective layer 109 can be a metal structure layer composed of one or more metal layers. For example, the metal structure layer can be composed of a first ITO material layer, an Ag material layer, and a second ITO material layer. The thickness of the first ITO material layer and the second ITO material layer can range from 80A to 200A, and the thickness of the Ag material layer can range from 600A to 3000A. Specifically, the thickness of the first ITO material layer and the second ITO material layer can be 80A, and the thickness of the Ag material layer can be 1000A. In addition, the metal structure layer can also be composed of a first Ti material layer, an Al material layer, and a second Ti material layer, which is not limited herein. Understandably, the first reflective layer 109 can be overlapped at the opening of the groove structure 102, thereby forming a "eave structure".

[0057] It should be noted that the orthographic projection of the light emitting opening 115 on the substrate 101 can be entirely within the groove structure 102, or partially within the groove structure 102, which is not limited herein.

[0058] A plurality of light emitting components 110 are arranged in an array on the side of the first reflective layer 109 distal to the substrate 101, and a light emitting region 111 of each light emitting component 110 corresponds to a light emitting opening 115. In addition, the light emitting substrate provided by the embodiments of the present application can further include a white oil layer 117 covering the side of the light emitting component 110 distal to the substrate 101, for reflecting light emitted by the light emitting component 110.

[0059] Specifically, each light emitting component 110 includes a first electrode 112 and a second electrode 113 arranged on the side of the first reflective layer 109 distal to the substrate 101, and a light emitting structure arranged on the side of the first electrode 112 and the second electrode 113 distal to the substrate 101. Each set of first electrode 112 and second electrode 113 is located on the two sides of a light emitting opening 115. Exemplarily, the first electrode 112 and the second electrode 113 can be, but are not limited to, copper electrodes. The light emitting structure includes a light emitting region 111 opposite the light emitting opening 115. It can be understood that the orthographic projection of the light emitting region 111 on the substrate 101 is located between the orthographic projection of the first electrode 112 on the substrate 101 and the orthographic projection of the second electrode 113 on the substrate 101.

[0060] The light emitting component 110 can be, but is not limited to, an LED light emitting component 110, the length of the light emitting component 110 can be, but is not limited to, 20 μm-300 μm, the wavelength range of the excitation light emitted by the light emitting component 110 can be, but is not limited to, 450 nm-480 nm, the thickness of the light emitting component 110 can be, but is not limited to, 5 nm-10 μm, and the brightness of the excitation light emitted by the light emitting component 110 can be, but is not limited to, 1000 nit-2000 nit. The thickness of the first electrode 112 and the second electrode 113 can be, but is not limited to, about 2 μm-5 μm, and the width of the first electrode 112 and the second electrode 113 can be, but is not limited to, 3 μm-50 μm. The first electrode 112 can act as an anode, and the second electrode 113 can act as a cathode.

[0061] The light emitting region 111 can include a hole injection layer, a light emitting layer, and an electron transport layer arranged in sequence. In some examples, the light emitting region 111 can be, but is not limited to, a multiple quantum well (MQW) material layer, the electron transport layer can be, but is not limited to, an N-type gallium nitride layer (N-GaN), and the hole injection layer can be, but is not limited to, a P-type gallium nitride layer (P-GaN). The first electrode 112 and the second electrode 113 are used to emit an excitation voltage to the light emitting region 111 to control the light emitting region 111 to emit light.

[0062] The color conversion layer 105 is arranged in the groove structure 102.

[0063] The color transfer layer 105 can be, but is not limited to, a quantum dot (QD) layer, a phosphor layer, or other color transfer materials. The color transfer layer 105 can be a mixture of red and green QD materials, or a mixture of red and green phosphors. When setting the color transfer layer 105, a solid-state quantum dot (QD) layer or a phosphor layer can be directly filled into the groove structure 102 to obtain the color transfer layer 105. In other embodiments, QD materials can be mixed into an adhesive to form the color transfer layer 105, wherein the mixing ratio of red QD material to green QD material can range from 1:4 to 1:9. The solid content of the QD material in the color transfer layer 105 can range from 1% to 3%, with the remainder being the adhesive. Additionally, reflective particles can be added to the color transfer layer 105, with the reflective particles accounting for 0.1% to 1% of the color transfer layer 105. In other embodiments, phosphor materials may be incorporated into the adhesive to form the color transfer layer 105. The solid content of the phosphor material may be, but is not limited to, 10% to 60%.

[0064] In addition, an encapsulation layer 116 is provided on the side of the color transfer layer 105 away from the substrate 101 and in the area where the first reflective layer 109 overlaps with the color transfer layer 105. The encapsulation layer 116 may be, but is not limited to, an acrylic resin layer or an epoxy resin layer, and the thickness of the acrylic resin layer or epoxy resin layer may range from, but is not limited to, 5 μm to 30 μm. The encapsulation layer 116 may be, but is not limited to, a SiNx layer or a SiO2 layer, wherein the thickness of the inorganic layer such as the SiNx layer or SiO2 layer ranges from 100 nm to 600 nm.

[0065] In such Figure 3 As shown, the light-emitting substrate also includes a reflective structure and a light guide post 107, both of which are disposed within the groove structure 102. The orthographic projection of the light guide post 107 onto the substrate 108 overlaps with the orthographic projection of the first region of the groove structure 102 onto the substrate 101; thus, the light guide post 107 can uniformly guide the color-converted light from the position on the substrate 101 directly opposite the first region of the groove structure 102 (i.e., the central region of the groove structure 102). The orthographic projection of the reflective structure onto the substrate 101 overlaps with the orthographic projection of the first region of the groove structure 102 onto the substrate 101. Thus, the reflective structure can reflect the color-converted light to the first reflective layer 109.

[0066] In the embodiment of the present application, the color conversion layer 105 is configured to perform color conversion on the light emitted by the light emitting region 111; the light guide column 107 is configured to transmit a part of the color converted light, so that the color converted light is output through the position on the substrate 101 opposite to the first region of the groove structure 102 (i.e., the central region of the groove structure 102); and the reflection structure is configured to reflect another part of the color converted light to the first reflection layer 109, and the first reflection layer 109 is configured to reflect the received color converted light to the region on the substrate 101 opposite to the first reflection layer 109.

[0067] In summary, the light emitting substrate provided by the embodiment of the present application can set the color conversion layer 105 in the groove structure 102 of the substrate 101, the groove bottom of the groove structure 102 includes a first region and a second region, and the orthographic projection of the first region on the substrate 101 is located within the orthographic projection of the second region on the substrate 101. Therefore, the first region is located in the central region of the groove structure 102. Since the orthographic projection of the light emitting opening 115 on the substrate 101 overlaps with the orthographic projection of the first region on the substrate 101, the light emitting opening 115 corresponds to the first region of the groove structure 102. Moreover, the light emitting substrate further includes a reflection structure and a light guide column 107, both of which are located in the groove structure 102, the orthographic projection of the light guide column 107 on the substrate 101 overlaps with the orthographic projection of the first region of the groove structure 102 on the substrate 101, and the orthographic projection of the reflection structure on the substrate 101 overlaps with the orthographic projection of the first region of the groove structure 102 on the substrate 101.

[0068] In the embodiment of the present application, the color conversion layer 105 is configured to perform color conversion on the light emitted by the light emitting region 111; the light guide column 107 is configured to transmit a part of the color converted light, so that the color converted light is output through the position on the substrate 101 opposite to the first region of the groove structure 102 (i.e., the central region of the groove structure 102); and the reflection structure is configured to reflect another part of the color converted light to the first reflection layer 109, and the first reflection layer 109 is configured to reflect the received color converted light to the region on the substrate 101 opposite to the first reflection layer 109.

[0069] Specifically, the specific implementation of the reflection structure and the light guide column 107 includes but is not limited to the following several ways:

[0070] The first way is as follows: Figure 3As shown, the reflective structure is the second reflective layer 106, the light guide column 107 includes a light guide column 108, the extension direction of the cross section of the light guide column 108 is perpendicular to the light emitting component 110 (in this way, the light guide column 108 can be parallel to or have a small angle with the light emitted by the light emitting area 111), one end of the light guide column 108 is in contact with the groove structure 102, and the orthographic projection of the light guide column 108 on the substrate 101 is located within the orthographic projection of the first area of the groove structure 102 on the substrate 101. In this way, the light guide column 108 can output the light converted in color by the color conversion layer 105 from the light emitting area 111 of the light emitting component 110 from the position of the substrate 101 directly opposite the first area of the groove structure 102 (the central area of the substrate 101) through the groove structure 102.

[0071] Specifically, the number of light guide columns 108 can be multiple, the multiple light guide columns 108 are arranged at intervals, and one end of each light guide column 108 is in contact with the groove structure 102 through the second reflective layer 106.

[0072] Exemplarily, the light guide column 108 can adopt, but is not limited to, a nanometer fiber column. The height of the nanometer fiber column can range from 10 μm to 30 μm, and the diameter of the nanometer fiber column can range from, but is not limited to, 50 nm to 100 nm. The light guide column 108 can be printed into the groove structure 102 by inkjet, and then the color conversion layer 105 is formed in the groove structure 102; or the light guide column 108 can be embedded in the color conversion layer 105 first, and then the color conversion layer 105 embedded with the light guide column 108 is arranged in the groove structure 102.

[0073] In this way, the second reflective layer 106 is also arranged between the two adjacent light guide columns 108. In this way, after the light emitted from the position directly opposite the first area of the groove structure 102 of the light emitting area 111 is converted in color, part of the light can be output from the position of the substrate 101 directly opposite the first area of the groove structure 102 (the central position of the substrate 101) through the light guide column 108 arranged at intervals, and the other part can be reflected by the second reflective layer 106 between the two adjacent light guide columns 108 to the first reflective layer 109, and then reflected by the first reflective layer 109 to the position of the substrate 101 located on both sides of the groove structure 102. In this way, the light converted in color output from the position of the substrate 101 directly opposite the first area of the groove structure 102 (the central position of the substrate 101) can not be excessively concentrated, and the light converted in color output by the substrate 101 is more uniform.

[0074] The second kind: as shown in Figure 5 and Figure 6 As shown, the reflective structure is the second reflective layer 106, the light guide column 108 is embedded in the color conversion layer 105, and the extension direction of the light guide column 108 is inclined to the direction parallel to the light emitting component 110.

[0075] Similarly, the light guide column 108 can adopt, but is not limited to, a nanofiber cylinder, wherein the height of the nanofiber cylinder can range from 10 μm to 30 μm, and the diameter of the nanofiber cylinder can range from, but is not limited to, 50 nm to 100 nm. The light guide column 108 can be printed into the groove structure 102 by inkjet, and then the color conversion layer 105 is formed in the groove structure 102; or the light guide column 108 can be embedded in the color conversion layer 105, and then the color conversion layer 105 embedded with the light guide column 108 is arranged in the groove structure 102, and the light guide column 108 is used for transmitting a part of the color-converted light and transmitting a part of the color-converted light along the extension direction of the cross section of the light guide column 108. Specifically, when the light guide column 108 is inclined towards the direction parallel to the light-emitting component 110, the extension direction of the cross section of the light guide column 108 is inclined towards the two sides of the groove structure 102.

[0076] The first reflection layer 109 is partially overlapped with the orthographic projection of the light guide column 108 on the substrate 101, so that the first reflection layer 109 can reflect the received color-converted light to the light guide column 108. The orthographic projection of the light guide column 108 on the substrate 101 is not completely overlapped with the orthographic projection of the second reflection layer 106 on the substrate 101, and the light guide column 108 includes a region opposite to the first region of the groove structure 102. In this way, when a part of the color-converted light transmits through the light guide column 108, it can be output through the position opposite to the first region of the groove structure 102 on the substrate 101.

[0077] Further, as shown in Figure 5 The second reflection layer 106 is used for reflecting a part of the color-converted light to the first reflection layer 109, and the first reflection layer 109 is used for reflecting the received color-converted light to the light guide column 108; the light guide column 108 is used for transmitting a part of the color-converted light to be output through the position opposite to the first region of the groove structure 102 on the substrate 101, and another part of the color-converted light to be conducted to the substrate 101 through one side of the groove structure 102, and the substrate 101 is used for refracting the received color-converted light back to the first reflection layer 109, and the first reflection layer 109 is also used for reflecting the received color-converted light to be output through the region opposite to the two sides of the groove structure 102 on the substrate 101. In this way, the color-converted light output through the position of the substrate 101 opposite to the first region of the groove structure 102 (the central position of the substrate 101) can not be excessively concentrated, and the color-converted light output by the substrate 101 can be more uniform.

[0078] Further, the plurality of light guide columns 108 are arranged at intervals, and the distance between two adjacent light guide columns 108 is greater than 2 μm and less than 4 μm. For example, the distance between two adjacent light guide columns 108 is 2.2 μm, 2.5 μm, or 3.5 μm.

[0079] In the above Figure 3 or Figure 5 Based on the corresponding embodiments, the refractive index of the light guide column 108 is greater than the refractive index of the color conversion layer 105, and the difference between the refractive index of the light guide column 108 and the refractive index of the color conversion layer 105 is greater than 0.5. For example, the refractive index of the light guide column 108 can be 2.5, and the refractive index of the color conversion layer 105 can be 1.2. In this way, when the color-converted light is incident into the light guide column 108, total reflection can occur in the light guide column 108, so that the color-converted light can be transmitted along the extension direction of the cross section of the light guide column 108, and then output from the position of the first region of the substrate 101 opposite to the groove structure 102. Figure 1 Based on the corresponding embodiments, when the color-converted light is incident into the light guide column 108, total reflection can occur in the light guide column 108, so that the color-converted light can be transmitted along the extension direction of the cross section of the light guide column 108, and then output from the position of the first region of the substrate 101 opposite to the groove structure 102. Figure 3 Based on the corresponding embodiments, when the color-converted light is incident into the light guide column 108, total reflection can occur in the light guide column 108, so that the color-converted light can be transmitted along the extension direction of the cross section of the light guide column 108, and then output from the position of the first region of the substrate 101 opposite to the groove structure 102.

[0080] In the above Figure 3 and Figure 5 Based on the corresponding embodiments, the groove structure 102 includes a first groove 103 and a second groove 104, both the first groove 103 and the second groove 104 are arc-shaped grooves, one side of the first groove 103 is connected to one side of the second groove 104, and the second reflection layer 106 covers the positions of the first region of the first groove 103 and the second groove 104. It can be understood that the area of the second reflection layer 106 in the first groove 103 is also arc-shaped, and the area of the second reflection layer 106 in the second groove 104 is also arc-shaped. In this way, a part of the color-converted light can be reflected by the arc-shaped second reflection layer 106 in the first groove 103 to the first reflection layer 109 located on the side close to the first groove 103, and a part of the color-converted light can be reflected by the arc-shaped second reflection layer 106 in the second groove 104 to the first reflection layer 109 located on the side close to the first groove 103.

[0081] In addition, another embodiment of the present application also provides a light-emitting substrate, which is different from the above Figure 3 and Figure 5 Based on the corresponding embodiments, the groove structure 102 includes a first groove 103 and a second groove 104, both the first groove 103 and the second groove 104 are arc-shaped grooves, one side of the first groove 103 is connected to one side of the second groove 104, and the second reflection layer 106 covers the positions of the first region of the first groove 103 and the second groove 104. It can be understood that the area of the second reflection layer 106 in the first groove 103 is also arc-shaped, and the area of the second reflection layer 106 in the second groove 104 is also arc-shaped. In this way, a part of the color-converted light can be reflected by the arc-shaped second reflection layer 106 in the first groove 103 to the first reflection layer 109 located on the side close to the first groove 103, and a part of the color-converted light can be reflected by the arc-shaped second reflection layer 106 in the second groove 104 to the first reflection layer 109 located on the side close to the first groove 103. Figure 7As shown, the reflective structure is a scattering layer 120, which includes a plurality of reflective particles 701 (such as reflective particles formed of materials such as TiO or SiO) and a light guide layer 702 (such as an acrylic resin layer).

[0082] Exemplarily, the concentration of the reflective particles 701 can range from, but is not limited to, 20%-70%. When the light L is incident into the scattering layer 120, the light L that is not blocked by the reflective particles 701 can directly pass through the light guide layer 702, while the light L that is blocked by the reflective particles 701 is reflected. Since the angles of the light L incident onto the respective reflective particles 701 are different, the scattering layer 120 can scatter the incident light L from various directions.

[0083] As shown in FIG. 1B, the color conversion layer 118 is provided with a through hole at a position opposite to the first region of the groove structure 102, a light guide column 119 is located in the through hole, and the light guide column 119 is spaced apart from the inner wall of the through hole to form a hollow opening. The scattering layer 120 is arranged on the side of the light guide column 119 close to the substrate 101 and in the hollow opening, and the light guide column 119 has a color conversion function. Figure 8 Figure 9 As shown in FIG. 1B, the color conversion layer 118 is provided with a through hole at a position opposite to the first region of the groove structure 102, a light guide column 119 is located in the through hole, and the light guide column 119 is spaced apart from the inner wall of the through hole to form a hollow opening. The scattering layer 120 is arranged on the side of the light guide column 119 close to the substrate 101 and in the hollow opening, and the light guide column 119 has a color conversion function.

[0084] As shown in FIG. 1B, the color conversion layer 118 is provided with a through hole at a position opposite to the first region of the groove structure 102, a light guide column 119 is located in the through hole, and the light guide column 119 is spaced apart from the inner wall of the through hole to form a hollow opening. The scattering layer 120 is arranged on the side of the light guide column 119 close to the substrate 101 and in the hollow opening, and the light guide column 119 has a color conversion function. Figure 8 As shown in FIG. 1B, the color conversion layer 118 is provided with a through hole at a position opposite to the first region of the groove structure 102, a light guide column 119 is located in the through hole, and the light guide column 119 is spaced apart from the inner wall of the through hole to form a hollow opening. The scattering layer 120 is arranged on the side of the light guide column 119 close to the substrate 101 and in the hollow opening, and the light guide column 119 has a color conversion function.

[0085] ​Understandably, since the color-converted light output from the area directly opposite the light guide 119 and the substrate 101 is equal to the sum of the light output from the light guide 119 after color conversion and the light scattered from the color conversion layer 118 to the area directly opposite the substrate 101 and the light guide 119, the brightness of the light output from the area directly opposite the light guide 119 may be higher. Therefore, the density of the light guide 119 can be set lower than the density of the color conversion layer 118. In this way, the amount of light output from the light guide 119 after color conversion is less, which can make the light output from the area directly opposite the substrate 101 and the light guide 119, and the area directly opposite the substrate 101 and the color conversion layer 118, more uniform.

[0086] In addition, another embodiment of this application provides a light-emitting substrate, which is compatible with... Figure 3 and Figure 5 The corresponding embodiments differ from those, such as Figure 10 and Figure 11 As shown, both the reflective structure and the light guide pillar are scattering layers 120. The structure of the scattering layer 120 can be referenced from... Figure 7 I won't go into details about this; it's understandable that... Figure 7 As can be seen, the scattering layer 120 has both reflective and light-guiding functions.

[0087] The color conversion layer 118 has a through-hole positioned opposite the first region of the groove structure 102, and the scattering layer 120 fills the through-hole. The scattering layer 120 includes a frustum-shaped first scattering region 121 and a frustum-shaped second scattering region 122. The smaller diameter bottom surface of the first scattering region 121 contacts the smaller diameter bottom surface of the second scattering region 122, and the second scattering region 122 is closer to the substrate 101 than the first scattering region 121. In this way, the light from the light-emitting region 111 of the light-emitting component 110 can be sufficiently scattered in all directions.

[0088] The diameters of the two circular base surfaces of the second scattering region 122 can be, but are not limited to, 20 μm and 100 μm, respectively, and the height of the second scattering region 122 can be, but are not limited to, 25 μm to 100 μm. The diameters of the two circular base surfaces of the first scattering region 121 can be, but are not limited to, 25 μm and 100 μm, respectively, and the height of the first scattering region 121 can be, but are not limited to, 25 μm to 100 μm.

[0089] Specifically, such as Figure 10As shown, the color conversion layer 105 is configured to color convert a portion of the light emitted by the light emitting region 111 and output the color converted light through the position of the substrate 101 corresponding to the first region of the groove structure 102 and the position of the substrate 101 corresponding to the first reflective layer 109; the first scattering region 121 is configured to scatter a portion of the light emitted by the light emitting region 111 to the color conversion layer 105 and output the scattered light through the position of the substrate 101 corresponding to the first region of the groove structure 102 and the position of the substrate 101 corresponding to the first reflective layer 109; the first scattering region 121 is further configured to transmit another portion of the light emitted by the light emitting region 111 to the second scattering region 122, the second scattering region 122 is configured to scatter the light from the first scattering region 121 to the first reflective layer 109 through the color conversion layer 105, and the first reflective layer 109 is configured to output the received color converted light through the position of the substrate 101 corresponding to the first region of the groove structure 102 and the position of the substrate 101 corresponding to the first reflective layer 109. In this way, the position of the substrate 101 corresponding to the first region of the groove structure 102 (i.e., the central region of the substrate 101) and the position of the substrate 101 corresponding to the first reflective layer 109 (i.e., the regions on both sides of the central region of the substrate 101) can output light. Thus, the middle and both sides of the light emitting region of the light emitting substrate do not have black regions. In this way, the light emitting substrate can uniformly emit light while the display device is thin.

[0090] Further, in Figure 10 According to the corresponding embodiment, the height of the scattering layer 120 in the direction perpendicular to the substrate 101 is greater than 25 μm and less than 150 μm. For example, the height of the scattering layer 120 in the direction perpendicular to the substrate 101 can be 30 μm, 80 μm, or 120 μm, etc., which is not limited herein. It can be understood that when the height of the scattering layer 120 in the direction perpendicular to the substrate 101 is greater than 25 μm, the scattering layer 120 can sufficiently scatter the light from the light emitting component 110 into the color conversion layer 105 for color conversion. When the height of the scattering layer 120 in the direction perpendicular to the substrate 101 is less than 150 μm, the entire display device can be thin.

[0091] It can be understood that, as Figure 3 , Figure 5 , Figure 8 and Figure 10 In the corresponding embodiment, the light emitting substrate further comprises a plurality of spaced apart condenser lenses 114 disposed on the side of the first reflective layer 109 close to the substrate 101. It can be understood that the color converted light reflected by the reflective structure or the scattering layer 120 to the condenser lens 114 can be condensed by the condenser lens 114 to the first reflective layer 109, and then output by the first reflective layer 109 to the substrate 101, which has high light output efficiency.

[0092] In addition, as Figure 12 and Figure 13 shown, Figure 3 , Figure 5 , Figure 8 and Figure 10 The condenser lens 114 in the corresponding embodiment can also be replaced by a nano-fiber structure layer 123 arranged on the side of the first reflective layer 109 close to the substrate 101. The nano-fiber structure layer 123 includes a plurality of U-shaped nano-fibers and a low-refractive material layer filled in the gaps of the plurality of U-shaped nano-fibers, and the opening of each U-shaped nano-fiber faces the substrate 101. The refractive index of the U-shaped nano-fiber is greater than that of the low-refractive material layer, and the difference between the refractive index of the U-shaped nano-fiber and that of the low-refractive material layer is greater than 0.5. For example, the diameter of the U-shaped nano-fiber can range from 10 nm to 300 nm, but is not limited thereto, and the length can range from 20 μm to 100 μm.

[0093] Exemplarily, the refractive index of the low-refractive material layer ranges from 1.2 to 1.3, and the U-shaped nano-fiber is a high-refractive material with a refractive index of 2.0 or higher. In this way, the light converted by the color conversion layer 105 can be totally reflected when being conducted into the U-shaped nano-fiber, which has a light guiding function. Furthermore, the light converted by the color conversion layer 105 can be conducted out of the opening of the U-shaped nano-fiber after being reflected to the U-shaped nano-fiber. Since the opening of each U-shaped nano-fiber faces the substrate 101, the light converted by the color conversion layer 105 can be reflected to the U-shaped nano-fiber and conducted to the substrate 101 for output.

[0094] In addition, the application also provides a display device, which includes a display panel and the light-emitting substrate provided by the first aspect of the application, and the light-emitting substrate is used to provide backlight for the display panel.

[0095] In the above description, the technical details such as the patterning of each layer are not described in detail. However, those skilled in the art should understand that the layers, regions and the like with desired shapes can be formed by various technical means. In addition, those skilled in the art can also design methods different from the above-described methods to form the same structure. In addition, although each embodiment is described above, this does not mean that the measures in each embodiment cannot be used advantageously in combination.

[0096] Although the preferred embodiments of the application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the application.

[0097] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A light-emitting substrate, characterized by, The light-emitting substrate comprises: a substrate, one side of the substrate being provided with a groove structure, a groove bottom of the groove structure comprising a first area and a second area, a normal projection of the first area on the substrate being located within a normal projection of the second area on the substrate; a first reflective layer, being provided around the groove structure on the substrate and forming a light-emitting opening, and a normal projection of the light-emitting opening on the substrate being located within a normal projection of the groove structure on the substrate; a plurality of light-emitting components, being arrayed on a side of the first reflective layer away from the substrate, a light-emitting area of each of the light-emitting components corresponding to one of the light-emitting openings; a color conversion layer, being provided in the groove structure, a normal projection of the light-emitting opening on the substrate and a normal projection of the first area of the groove structure on the substrate being overlapped; the light-emitting substrate further comprises a reflective structure and a light guide column, the light guide column and the reflective structure being both provided in the groove structure, a normal projection of the light guide column on the substrate and a normal projection of the first area of the groove structure on the substrate being overlapped; a normal projection of the reflective structure on the substrate and a normal projection of the first area of the groove structure on the substrate being overlapped; the reflective structure is a second reflective layer, the second reflective layer covering a side of the groove structure close to the color conversion layer; an extending direction of a cross section of the light guide column is perpendicular to the light-emitting component, one end of the light guide column is in contact with the groove structure, and a normal projection of the light guide column on the substrate is located within a normal projection of the first area of the groove structure on the substrate; a number of the light guide columns is plural, the plurality of light guide columns are spaced apart, and one end of each of the light guide columns is in contact with the groove structure through the second reflective layer.

2. The light emitting substrate of claim 1, wherein, the groove structure comprises a first groove and a second groove, the first groove and the second groove are both arc-shaped grooves, one side of the first groove and one side of the second groove are connected, and the second reflective layer covers positions of the first groove and the second groove in the first area.

3. The light emitting substrate of any of claims 1-2, wherein, a refractive index of the light guide column is greater than a refractive index of the color conversion layer, and a difference between the refractive index of the light guide column and the refractive index of the color conversion layer is greater than 0.

5.

4. The light emitting substrate of claim 1, wherein, the light-emitting substrate further comprises a plurality of spaced-apart condenser lenses, the plurality of spaced-apart condenser lenses being provided on a side of the first reflective layer close to the substrate.

5. The light emitting substrate of claim 1, wherein, the light-emitting substrate further comprises a nano optical fiber structure layer, the nano optical fiber structure layer being provided on a side of the first reflective layer close to the substrate, wherein the nano optical fiber structure layer comprises a plurality of U-shaped nano optical fibers and a low-refraction material layer filled in gaps of the plurality of U-shaped nano optical fibers, and an opening of each of the U-shaped nano optical fibers faces the substrate, a refractive index of the U-shaped nano optical fiber is greater than a refractive index of the low-refraction material layer, and a difference between the refractive index of the U-shaped nano optical fiber and the refractive index of the low-refraction material layer is greater than 0.

5.

6. A light-emitting substrate, characterized by the light-emitting substrate comprises: A substrate, one side of the substrate is provided with a groove structure, the groove bottom of the groove structure includes a first area and a second area, the orthographic projection of the first area on the substrate is within the orthographic projection of the second area on the substrate; A first reflective layer, which is arranged around the groove structure on the substrate and forms a light emitting opening, and the orthographic projection of the light emitting opening on the substrate is within the orthographic projection of the groove structure on the substrate; A plurality of light emitting components, which are arranged in an array on the side of the first reflective layer away from the substrate, and the light emitting area of each light emitting component corresponds to one light emitting opening; A color conversion layer, which is arranged in the groove structure, and the orthographic projection of the light emitting opening on the substrate overlaps with the orthographic projection of the first area of the groove structure on the substrate; The light emitting substrate further comprises a reflective structure and a light guide column, the light guide column and the reflective structure are both arranged in the groove structure, and the orthographic projection of the light guide column on the substrate overlaps with the orthographic projection of the first area of the groove structure on the substrate; the orthographic projection of the reflective structure on the substrate overlaps with the orthographic projection of the first area of the groove structure on the substrate; The reflective structure is a second reflective layer, the light guide column is arranged in the groove structure, the extension direction of the cross section of the light guide column is inclined towards the direction parallel to the light emitting component, and the orthographic projection of the light guide column on the substrate does not completely overlap with the orthographic projection of the second reflective layer on the substrate, and the orthographic projection of the first reflective layer on the substrate partially overlaps with the orthographic projection of the light guide column on the substrate.

7. The light emitting substrate of claim 6, wherein, The number of light guide columns is a plurality, a plurality of light guide columns are arranged at intervals, and the distance between adjacent two light guide columns is greater than 2μm and less than 4μm.

8. The light emitting substrate of claim 6, wherein, The groove structure includes a first groove and a second groove, the first groove and the second groove are both arc-shaped grooves, one side of the first groove and one side of the second groove are connected, and the second reflective layer covers the positions of the first groove and the second groove in the first area.

9. The light emitting substrate of any of claims 6-8, wherein, The refractive index of the light guide column is greater than the refractive index of the color conversion layer, and the difference between the refractive index of the light guide column and the refractive index of the color conversion layer is greater than 0.

5.

10. A light-emitting substrate, characterized by The light emitting substrate comprises: A substrate, one side of the substrate is provided with a groove structure, the groove bottom of the groove structure includes a first area and a second area, the orthographic projection of the first area on the substrate is within the orthographic projection of the second area on the substrate; A first reflective layer, which is arranged around the groove structure on the substrate and forms a light emitting opening, and the orthographic projection of the light emitting opening on the substrate is within the orthographic projection of the groove structure on the substrate; A plurality of light emitting components, which are arranged in an array on the side of the first reflective layer away from the substrate, and the light emitting area of each light emitting component corresponds to one light emitting opening; A color conversion layer, which is arranged in the groove structure, and the orthographic projection of the light emitting opening on the substrate overlaps with the orthographic projection of the first area of the groove structure on the substrate; The light-emitting substrate further comprises a reflective structure and a light guide column, both of which are arranged in the groove structure, a projection of the light guide column on the substrate overlaps with a projection of the first area of the groove structure on the substrate, and a projection of the reflective structure on the substrate overlaps with a projection of the first area of the groove structure on the substrate. The reflective structure is a scattering layer, the color conversion layer is provided with a through hole at a position opposite to the first area of the groove structure, the light guide column is located in the through hole, and the light guide column and the inner wall of the through hole are spaced apart to form a hollow opening, the scattering layer is arranged on a side of the light guide column close to the substrate and in the hollow opening, and the light guide column has a color conversion function.

11. The light emitting substrate of claim 10, wherein, The concentration of quantum dot material in the light guide column is lower than the concentration of quantum dot material in the color conversion layer.

12. The light emitting substrate of claim 10, wherein, The scattering layer comprises a plurality of reflective particles and a light guide layer, and the plurality of reflective particles are distributed in the light guide layer.

13. A light emitting substrate, characterized by The light-emitting substrate comprises: a substrate, one side of the substrate is provided with a groove structure, the groove structure comprises a first area and a second area, a projection of the first area on the substrate is located within a projection of the second area on the substrate; a first reflective layer, arranged around the groove structure on the substrate and forming a light-emitting opening, and a projection of the light-emitting opening on the substrate is located within a projection of the groove structure on the substrate; a plurality of light-emitting components, arranged in an array on a side of the first reflective layer away from the substrate, and a light-emitting area of each light-emitting component corresponds to a light-emitting opening; a color conversion layer, arranged in the groove structure, and a projection of the light-emitting opening on the substrate overlaps with a projection of the first area of the groove structure on the substrate; the light-emitting substrate further comprises a reflective structure and a light guide column, both of which are arranged in the groove structure, a projection of the light guide column on the substrate overlaps with a projection of the first area of the groove structure on the substrate, and a projection of the reflective structure on the substrate overlaps with a projection of the first area of the groove structure on the substrate; the reflective structure and the light guide column are both scattering layers, the color conversion layer is provided with a through hole at a position opposite to the first area of the groove structure, and the scattering layer is filled in the through hole; wherein the scattering layer comprises a first scattering area in the shape of a circular truncated cone and a second scattering area in the shape of a circular truncated cone, a smaller-diameter bottom surface of the first scattering area is in contact with a smaller-diameter bottom surface of the second scattering area, and the second scattering area is closer to the substrate than the first scattering area.

14. The light emitting substrate of claim 13, wherein, The scattering layer comprises a plurality of reflective particles and a light guide layer, and the plurality of reflective particles are distributed in the light guide layer.

15. The light emitting substrate of claim 13, wherein, The height of the scattering layer perpendicular to the substrate is greater than 25 μm and less than 150 μm.

16. A display device comprising a display panel and the light-emitting substrate of any one of claims 1-15, the light-emitting substrate being used to provide backlight for the display panel.

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