Light-emitting substrate and display device

Abstract

The invention provides a light-emitting substrate and a display device, and relates to the technical field of display. A color conversion layer and a light guide column are arranged in a groove structure of a base of the light-emitting substrate, and the color conversion layer can carry out color conversion on light emitted by a light-emitting area; the light guide column is used for transmitting a part of the light after color conversion so that the light after color conversion can be output through the position, right opposite to the first area of the groove structure, of the base, and the reflection structure of the light-emitting substrate is used for reflecting the other part of the light after color conversion to the first reflection layer. And the first reflecting layer is used for reflecting the received light subjected to color conversion to an area, right facing the first reflecting layer, of the substrate for outputting. In this way, the position, right facing the first area of the groove structure, of the substrate (namely, the central area of the substrate) and the area, right facing the first reflecting layer, of the substrate (namely, the areas located on the two sides of the central area of the substrate) both output light, and even light emitting of the light-emitting area of the light-emitting substrate can be achieved under the condition that the display device is ultrathin.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and in particular, to a light-emitting substrate and a display device. Background Art

[0002] With the progress of technology, display technologies are also developing rapidly. Among them, the thinness of a display device is an index for evaluating the quality of the display device. For a current display device, as Figure 1 shown, in order to make the display device ultra-thin, a groove can be provided in the substrate of the light-emitting substrate (i.e., the backlight structure) of the display device, and a second reflective layer and a color conversion layer are stacked in the groove. In addition, first reflective layers are provided on both sides of the substrate where the groove is located, a plurality of light-emitting openings are provided at positions of the first reflective layer facing the groove, and a light-emitting component is provided on a side of the first reflective layer away from the substrate.

[0003] The light-emitting principle of this light-emitting substrate is: still as Figure 1 shown, the light-emitting component 109 emits light, which passes through the light-emitting opening 115 to the color conversion layer 105. The color conversion layer 105 converts the color of the light and then reflects it back to the first reflective layer 109 from the second reflective layer 106. Then, the first reflective layer 109 outputs from areas of the substrate 101 on both sides of the groove structure. In this way, there is no light output in the area of the substrate 101 where the groove structure 102 is located. Furthermore, as Figure 2 shown, a black area 203 appears in the center of the light-emitting area 201 of the light-emitting substrate, that is, the light emission is uneven. Therefore, currently, when the display device is ultra-thin, it is impossible to take into account the uniform light emission of the light-emitting area of the light-emitting substrate. Summary of the Invention

[0004] The present application provides a light-emitting substrate, a display device, and a method for manufacturing a light-emitting substrate, which are used to solve the problem in the prior art that when the display device is ultra-thin, it is impossible to take into account the uniform light emission of the light-emitting area of the display device.

[0005] In a first aspect, the present application further provides a light-emitting substrate, including:

[0006] A substrate, on one side of which a groove structure is provided. The bottom of the groove structure includes a first area and a second area, and the orthographic projection of the first area on the substrate is located within the orthographic projection of the second area on the substrate;

[0007] A first reflective layer, which 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] A plurality of light-emitting components, which are arranged in an array on a 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 within the groove structure, and the orthographic projection of the light-emitting opening on the substrate overlaps with the orthographic projection of the first region of the groove structure on the substrate.

[0010] The light-emitting substrate further includes a reflective structure and a light guide column. Both the light guide column and the reflective structure are disposed within the groove structure. The orthographic projection of the light guide column on the substrate overlaps with the orthographic projection of the first region 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 region of the groove structure on the substrate.

[0011] In a possible implementation manner, the reflective structure is a second reflective layer, and the second reflective layer covers the side of the groove structure close to the color conversion layer. The extending direction of the cross-section of the light guide column is perpendicular to the light-emitting component. One end of the light guide column contacts the groove structure, and the orthographic projection of the light guide column on the substrate is located within the orthographic projection of the first region of the groove structure on the substrate.

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

[0013] In a possible implementation manner, the groove structure includes a first groove and a second groove. Both the first groove and the second groove are arc-shaped grooves. One side of the first groove is connected to one side of the second groove. The second reflective layer covers the positions of the first groove and the second groove in the first region.

[0014] In a possible implementation manner, the reflective structure is a second reflective layer. The light guide column is disposed within the groove structure. The extending direction of the cross-section of the light guide column is inclined in a direction parallel to the light-emitting component. 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. 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.

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

[0016] In a possible implementation manner, the groove structure includes a first groove and a second groove. Both the first groove and the second groove are arc-shaped grooves. One side of the first groove is connected to one side of the second groove. The second reflective layer covers the positions of the first groove and the second groove in the first region.

[0017] In a possible implementation manner, 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 reflection structure is a scattering layer. A through hole is provided at a position of the color conversion layer facing the first region of the groove structure. The light guide column is located in the through hole, and a hollow opening is formed by spacing the light guide column from the inner wall of the through hole. The scattering layer is disposed 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.

[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 reflection particles and a light guide layer, and the plurality of reflection particles are distributed in the light guide layer.

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

[0022] Wherein, the scattering layer includes a frustum-shaped first scattering region and a frustum-shaped second scattering region. The smaller bottom surface of the first scattering region is in contact with the smaller 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 reflection particles and a light guide layer, and the plurality of reflection particles are distributed in the light guide layer.

[0024] In a possible implementation, the height of the scattering layer perpendicular to the substrate is 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 disposed on a side of the first reflection layer close to the substrate.

[0026] In a possible implementation, the light-emitting substrate further includes a nano-fiber structure layer, and the nano-fiber structure layer is disposed on a side of the first reflection layer close to the substrate. Wherein, the nano-fiber structure layer includes a plurality of U-shaped nano-fibers and a low-refractive-index material layer filled in the gaps between the plurality of U-shaped nano-fibers. The opening of each U-shaped nano-fiber faces the substrate. The refractive index of the U-shaped nano-fiber is greater than the refractive index of the low-refractive-index material layer, and the difference between the refractive index of the U-shaped nano-fiber and the refractive index of the low-refractive-index 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 display device provided by the present application can dispose the color conversion layer in the groove structure of the substrate, and the bottom of the groove structure includes a first region and a second region, and the orthographic projection of the first region on the substrate is located within the orthographic projection of the second region on the substrate. Therefore, the first region is located in the central region of the groove structure. Since the orthographic projection of the light-emitting opening on the substrate overlaps with the orthographic projection of the first region on the substrate, the light-emitting opening corresponds to the central region of the groove structure. Moreover, the light-emitting substrate further includes a reflection structure and a light guide column, both of which are located in the groove structure, and there is an overlap between the orthographic projection of the light guide column on the substrate and the orthographic projection of the first region of the groove structure on the substrate; there is an overlap between the orthographic projection of the reflection structure on the substrate and the orthographic projection of the first region of the groove structure on the substrate.

[0029] In this way, the light guide column is used to transmit a part of the light color-converted by the color conversion layer, so that the color-converted light is uniformly output through the position opposite to the light-emitting opening of the substrate (i.e., the central region of the substrate), and the reflection structure is used to reflect another part of the color-converted light to the first reflection layer, and the first reflection layer is used to reflect the received color-converted light to the region of the substrate opposite to the first reflection layer for output (i.e., the regions on both sides of the central region of the substrate). Therefore, black regions will not appear in the middle and on both sides of the light-emitting region of the light-emitting substrate. In this way, when the display device is ultra-thin, it is possible to make the light-emitting region of the light-emitting substrate emit light uniformly. Description of the 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 required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

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

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

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

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

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

[0036] Figure 6The second top view of the light-emitting substrate provided by the embodiment of the present application;

[0037] Figure 7 The specific structural schematic diagram of the scattering layer provided by the embodiment of the present application;

[0038] Figure 8 The third cross-sectional view of the light-emitting substrate provided by the embodiment of the present application;

[0039] Figure 9 The third top view of the light-emitting substrate provided by the embodiment of the present application;

[0040] Figure 10 The fourth cross-sectional view of the light-emitting substrate provided by the embodiment of the present application;

[0041] Figure 11 The fourth top view of the light-emitting substrate provided by the embodiment of the present application;

[0042] Figure 12 The fifth cross-sectional view of the light-emitting substrate provided by the embodiment of the present application;

[0043] Figure 13 The fifth top view of the light-emitting substrate provided by the embodiment of the present application. Detailed implementation manners

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

[0045] Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary, and in practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

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

[0047] The light-emitting principle of the light-emitting substrate of the current display device is as follows: As Figure 1As shown, the light emitting component emits light through the light outlet opening to the color conversion layer, and the color conversion layer converts the light and reflects it back to the first reflection layer from the reflection structure. Then, the first reflection layer outputs the light from the areas on both sides of the groove of the substrate. As a result, no light is output from the area of ​​the substrate in the groove. Figure 2 As shown, a black spot appears in the center of the light emitting area of ​​the light emitting substrate, that is, the light emission is uneven. Therefore, in the case of ultra-thin display devices, it is currently impossible to ensure that the light emitting area of ​​the light emitting substrate emits light evenly.

[0048] Based on the above technical problems, the inventive concept of the present application is that: a light guide column can be embedded in the color conversion layer of the light-emitting substrate, and then, the color conversion layer can perform color conversion on the light emitted from the light-emitting area; the light guide column is used to transmit a part of the color-converted light, so that the color-converted light is output through the position where the substrate and the first area of ​​the groove structure are opposite, and the reflective structure of the light-emitting substrate is used to reflect the other part of the color-converted light to the first reflective layer, and the first reflective layer is used to reflect the received color-converted light to the area of ​​the substrate opposite to the first reflective layer for output. In this way, light is output from the position where the substrate and the first area of ​​the groove structure are opposite (that is, the central area of ​​the substrate) and the area where the substrate is opposite to the first reflective layer (that is, the areas on both sides of the central area of ​​the substrate). Therefore, no black area will appear in the middle and on both sides of the light-emitting area of ​​the light-emitting substrate. In this way, when the display device is ultra-thin, it is possible to take into account that the light-emitting area of ​​the light-emitting substrate emits light uniformly.

[0049] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0050] See also Figure 3 and Figure 4 , the embodiment of the present application provides a light-emitting substrate, including:

[0051] A substrate 101 is provided with a groove structure 102 on one side of the substrate 101. The groove bottom of the groove structure 102 includes 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 at 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 exit opening 115.

[0052] Among them, the substrate 101 may include glass, polyethylene terephthalate (PET), polyethylene naphthalate two formic acid glycol ester (PEN), or colorless polyimide (CPI), etc. It can be understood that the light transmittance of the substrate 101 is greater than 90% and is used for light guiding.

[0053] It should be noted that the substrate 101 may be a single-layer structure or a multi-layer structure. For example, the substrate 101 may include a glass substrate, or the substrate 101 may also include at least one flexible substrate and at least one buffer layer, and the flexible substrate and the buffer layer are alternately stacked. The embodiments of the present application do not limit this.

[0054] In some embodiments, the refractive index range of the substrate 101 may be, but is not limited to, 1.5 to 1.6, and the substrate 101 has a certain impact resistance. In some embodiments, the opening width range of the groove structure 102 may be, but is not limited to, 50 μm to 1000 μm, and the depth of the groove structure 102 may be, but is not limited to, 50 μm to 300 μm.

[0055] The first reflective layer 109 is disposed around the groove structure 102 on the substrate 101 to form 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] Among them, the first reflective layer 109 may be a metal structure layer composed of one or more metal layers stacked. For example, a metal structure layer composed of a first ITO material layer, an Ag material layer, and a second ITO material layer, etc. may be used. Among them, the thickness range of the first ITO material layer and the second ITO material layer may be, but is not limited to, 80 Å to 200 Å, and the thickness range of the Ag material layer may be, but is not limited to, 600 Å to 3000 Å. Specifically, the thickness of the first ITO material layer and the second ITO material layer may be, but is not limited to, 80 Å, and the thickness of the Ag material layer may be, but is not limited to, 1000 Å. In addition, the metal structure layer may also be a metal structure layer composed of a first Ti material layer, an Al material layer, and a second Ti material layer, etc., which is not limited here. It can be understood that the first reflective layer 109 may overlap at the opening of the groove structure 102 to form an "eaves structure".

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

[0058] A plurality of light-emitting components 110 are arranged in an array on the side of the first reflective layer 109 away from the substrate 101, and the light-emitting region 111 of each light-emitting component 110 is arranged corresponding to an out-light opening 115. Additionally, the light-emitting substrate provided in the embodiment of the present application may further include: a white oil layer 117, which covers the side of the light-emitting component 110 away from the substrate 101 and is used to reflect the 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 away from the substrate 101, and a light-emitting structure arranged on the side of the first electrode 112 and the second electrode 113 away from the substrate 101. Among them, each group of the first electrode 112 and the second electrode 113 are respectively located on both sides of an out-light opening 115. Exemplarily, the first electrode 112 and the second electrode 113 can both be, but are not limited to, copper electrodes. The light-emitting structure includes a light-emitting region 111 facing the out-light 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] Among them, the light-emitting component 110 can be, but is not limited to, an LED light-emitting component 110. The length range of the light-emitting component 110 can be, but is not limited to, 20μm to 300μm. The wavelength range of the excitation light emitted by the light-emitting component 110 can be, but is not limited to, 450nm to 480nm. The thickness range of the light-emitting component 110 can be, but is not limited to, 5nm to 10μm. The brightness range of the excitation light emitted by the light-emitting component 110 can be, but is not limited to, 1000nit to 2000nit. The thickness range of the first electrode 112 and the second electrode 113 can be, but is not limited to, about 2μm to 5μm. The width of the first electrode 112 and the second electrode 113 can be, but is not limited to, 3μm to 50μm. Among them, the first electrode 112 can be used as an anode, and the second electrode 113 can be used as a cathode.

[0061] The light-emitting region 111 may include a hole injection layer, a light-emitting layer, and an electron transport layer that are sequentially stacked. 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). 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 apply an excitation voltage to the light-emitting region 111 to control the light-emitting region 111 to emit light.

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

[0063] The color conversion layer 105 can be, but is not limited to, color conversion materials such as a quantum dot QD layer, a phosphor layer, etc. The color conversion layer 105 can be a color conversion layer 105 composed of a mixture of a red QD material and a green QD material, or a color conversion layer 105 composed of a mixture of a red phosphor and a green phosphor. When setting the color conversion layer 105, a solid material type quantum dot QD layer or a phosphor layer can be directly filled into the groove structure 102 to obtain the color conversion layer 105. In some other embodiments, the QD material can also be mixed into a glue material to form the color conversion layer 105. Among them, the mixing ratio range of the red QD material and the green QD material in the QD material can be 1:4 to 1:9. The solid content range of the QD material in the color conversion layer 105 can be 1% to 3%, and the balance is the glue material. In addition, reflective particles can be added to the color conversion layer 105, and the proportion of the reflective particles in the color conversion layer 105 is 0.1% to 1%. In some other embodiments, the phosphor material can also be mixed into the glue material to form the color conversion layer 105. Among them, the solid content of the phosphor material can be, but is not limited to, 10% to 60%.

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

[0065] As shown in Figure 3 the light-emitting substrate further includes a reflective structure and a light guide column 107. The light guide column 107 and the reflective structure are both disposed in the groove structure 102. The orthographic projection of the light guide column 107 on the substrate 108 overlaps with the orthographic projection of the first region of the groove structure 102 on the substrate 101. In this way, the light guide column 107 can uniformly guide out the color-converted light from the position of the first region (i.e., the central region of the groove structure 102) of the substrate 101 facing the groove structure 102. The orthographic projection of the reflective structure on the substrate 101 overlaps with the orthographic projection of the first region of the groove structure 102 on the substrate 101. In this way, the reflective structure can reflect the color-converted light to the first reflective layer 109.

[0066] In an embodiment of the present application, the color conversion layer 105 is configured to perform color conversion on the light emitted from 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 first region (i.e., the central region of the groove structure 102) of the substrate 101 facing 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 of the substrate 101 facing the first reflection layer 109 for output.

[0067] In summary, for a light-emitting substrate provided in an embodiment of the present application, the color conversion layer 105 can be disposed in the groove structure 102 of the substrate 101. The 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 the reflection structure and the light guide column 107 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; 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] Wherein, the light guide column 107 is configured to transmit a part of the light color-converted by the color conversion layer 105, so that the color-converted light is uniformly output through the position of the substrate 101 facing the first region of the groove structure 102 (i.e., the central region of the substrate 101), 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 of the substrate 101 facing the first reflection layer 109 for output (i.e., the regions on both sides of the central region of the substrate). Thus, no black regions will appear in the middle and on both sides of the light-emitting region of the light-emitting substrate. In this way, when the display device is ultra-thin, it is possible to make the light-emitting region of the light-emitting substrate emit light evenly.

[0069] Specifically, the specific implementations of the reflection structure and the light guide column 107 include but are not limited to the following several ways:

[0070] The first one: As Figure 3As shown, the reflection structure is the second reflection layer 106. The light guide column 107 includes a light guide column 108. The extending 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 the light emitted by the light-emitting area 111 or have a small included angle). One end of the light guide column 108 contacts 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 after color conversion by the color conversion layer 105 of the light-emitting area 111 of the light-emitting component 110 through the groove structure 102 from the position of the substrate 101 opposite to the first area of the groove structure 102 (the central area of the substrate 101).

[0071] Specifically, the number of the 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 passes through the second reflection layer 106 and contacts the groove structure 102.

[0072] Exemplarily, the light guide column 108 can be but is not limited to a nano-fiber cylinder. Among them, the height range of the nano-fiber cylinder can be 10 μm to 30 μm, and the diameter range of the nano-fiber cylinder can be 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 first 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.

[0073] In this way, the second reflection layer 106 is also arranged between two adjacent light guide columns 108. Thus, after the light emitted from the position of the light-emitting area 111 opposite to the first area of the groove structure 102 is color-converted, a part of the light can be output from the position of the substrate 101 opposite to the first area of the groove structure 102 (the central position of the substrate 101) through the spaced light guide columns 108, and another part of the light can be reflected by the second reflection layer 106 between two adjacent light guide columns 108 to the first reflection layer 109, and then reflected by the first reflection layer 109 to the positions on both sides of the groove structure 102 of the substrate 101 for output. In this way, it can be ensured that the color-converted light output from the position of the substrate 101 opposite to the first area of the groove structure 102 (the central position of the substrate 101) is not overly concentrated, and the color-converted light output from the substrate 101 is more uniform.

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

[0075] Similarly, the light guide column 108 can be, but is not limited to, a nano optical fiber cylinder. The height range of the nano optical fiber cylinder can be 10 μm to 30 μm, and the diameter range of the nano optical fiber cylinder can be, 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 a color conversion layer 105 is formed in the groove structure 102; or the light guide column 108 can be first 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. The light guide column 108 is used to transmit a part of the color-converted light and also to transmit 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 in a direction parallel to the light-emitting component 110, the extension direction of the cross section of the light guide column 108 is inclined toward both sides of the groove structure 102.

[0076] Wherein, the orthographic projection of the first reflection layer 109 on the substrate 101 overlaps with the orthographic projection of the light guide column 108 on the substrate 101. In this way, 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 does not completely overlap with the orthographic projection of the second reflection layer 106 on the substrate 101, and the light guide column 108 includes a region facing the first region of the groove structure 102. In this way, when a part of the color-converted light passes through the light guide column 108, it can be output at a position on the substrate 101 facing the first region of the groove structure 102.

[0077] Furthermore, still as Figure 5 shown, the second reflection layer 106 is used to reflect a part of the color-converted light to the first reflection layer 109, and the first reflection layer 109 is used to reflect the received color-converted light to the light guide column 108; the light guide column 108 is used to transmit a part of the color-converted light and output it through a position on the substrate 101 facing the first region of the groove structure 102, and another part of the color-converted light is conducted to the substrate 101 through one side of the groove structure 102. The substrate 101 is used to refract the received color-converted light back to the first reflection layer 109, and the first reflection layer 109 is also used to reflect the received color-converted light to the regions on both sides of the substrate 101 facing the groove structure 102 for output. In this way, it can be ensured that the color-converted light output at the position on the substrate 101 facing the first region of the groove structure 102 (the central position of the substrate 101) is not overly concentrated, and the color-converted light output by the substrate 101 is more uniform.

[0078] Furthermore, the number of light guide columns 108 is multiple, the multiple 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] Based on the above Figure 3 or Figure 5 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, based on the Figure 1 corresponding embodiments, when the color-converted light irradiates into the light guide column 108, total internal reflection can occur in the light guide column 108. Thus, the color-converted light can be transmitted along the extending 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 facing the groove structure 102. Additionally, based on the Figure 3 corresponding embodiments, when the color-converted light irradiates into the light guide column 108, total internal reflection can occur in the light guide column 108. Thus, the color-converted light can be transmitted along the extending direction of the cross-section of the light guide column 108 and conducted to the substrate 101 through one side of the groove structure 102, so that the substrate 101 can refract the received color-converted light back to the first reflective layer 109.

[0080] In Figure 3 and Figure 5 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. The second reflective layer 106 covers the positions of the first groove 103 and the second groove 104 in the first region. It can be understood that the region of the second reflective layer 106 located in the first groove 103 is also arc-shaped, and the region of the second reflective layer 106 located 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 reflective layer 106 located in the first groove 103 to the first reflective layer 109 located on the side close to the first groove 103; a part of the color-converted light can be reflected by the arc-shaped second reflective layer 106 located in the second groove 104 to the first reflective layer 109 located on the side close to the first groove 103.

[0081] In addition, another embodiment of the present application further provides a light-emitting substrate. Different from the Figure 3 and Figure 5 corresponding embodiments, as Figure 7As shown, the reflection structure is a scattering layer 120, and the scattering layer 120 includes a plurality of reflection particles 701 (such as reflection 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 range of the reflection particles 701 can be, but is not limited to, 20%-70%. When the light L irradiates into the scattering layer 120, the light L that is not blocked by the reflection particles 701 can directly pass through the light guide layer 702, while the light L blocked by the reflection particles 701 is reflected. Since the angles of the light L incident on each of the reflection particles 701 are different, the scattering layer 120 can scatter the incident light L in all directions.

[0083] As Figure 8 and Figure 9 shown, a through hole is provided at a position of the color conversion layer 118 facing the first region of the groove structure 102. The light guide column 119 is located in the through hole, and a hollow opening is formed by a gap between the light guide column 119 and the inner wall of the through hole. The scattering layer 120 is disposed on a 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] It can be understood that, still as Figure 8 shown, the light emitting region 111 of the light emitting component 110 is used to transmit the emitted light to the color conversion layer 118, the light guide column 119, and the scattering layer 120. The color conversion layer 118 is used to perform color conversion on the received light and output it through the substrate 101. In addition, since the light guide column 119 also has a color conversion function, the light guide column 119 is used to perform color conversion on the received light and then enter the scattering layer 120. The scattering layer 120 is used to scatter the light from the light guide column 119 and the light from the light emitting region 111, so that the color-converted light is output from the region of the substrate 101 facing the color conversion layer 118, the region of the substrate 101 facing the light guide column 119, and the regions of the substrate 101 facing both sides of the groove structure 102. In this way, light is output from the position of the substrate 101 facing the first region of the groove structure 102 (i.e., the central region of the substrate 101) and the region of the substrate 101 facing the first reflection layer 109 (i.e., the regions on both sides of the central region of the substrate 101). Therefore, there will be no black regions in the middle and on both sides of the light emitting area of the light emitting substrate. Thus, in the case of an ultra-thin display device, it is possible to make the light emitting area of the light emitting substrate emit light evenly.

[0085] Understandably, since the light after color conversion output from the area of the base 101 facing the light guide column 119 is equal to the sum of the light output to the base 101 after color conversion by the light guide column 119 and the light scattered to the area of the base 101 facing the light guide column 119 after color conversion by the color conversion layer 118, it may cause the light output from the area of the base 101 facing the light guide column 119 to have a higher brightness. Therefore, further, the concentration of the light guide column 119 can be set to be lower than that of the color conversion layer 118. In this way, the amount of light output to the area of the base 101 facing the light guide column 119 after color conversion by the light guide column 119 is less, which can make the light output from the area of the base 101 facing the light guide column 119 and the area of the base 101 facing the color conversion layer 118 more uniform.

[0086] In addition, another embodiment of the present application further provides a light-emitting substrate, which is different from the Figure 3 and Figure 5 corresponding embodiments. As shown in Figure 10 and Figure 11 , both the reflection structure and the light guide column are the scattering layer 120. Among them, the structure of the scattering layer 120 can refer to Figure 7 , which will not be elaborated here. Understandably, it can be seen from Figure 7 that the scattering layer 120 has both a reflection function and a light guiding function.

[0087] Among them, through holes are provided at the position of the first region of the color conversion layer 118 facing the groove structure 102, and the scattering layer 120 is filled in the through holes. The scattering layer 120 includes a frustum-shaped first scattering region 121 and a frustum-shaped second scattering region 122. The smaller bottom surface of the first scattering region 121 is in contact with the smaller bottom surface of the second scattering region 122, and the second scattering region 122 is closer to the base 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 fully scattered in all directions.

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

[0089] Specifically, as shown in Figure 10As shown, the color conversion layer 105 is used to perform color conversion on a part of the light emitted by the light-emitting region 111, and then output it through the positions where the base 101 faces the first region of the groove structure 102 and the position where the base 101 faces the first reflective layer 109; the first scattering region 121 is used to scatter a part of the light from the light-emitting region 111 to the color conversion layer 105, and output it through the positions where the base 101 faces the first region of the groove structure 102 and the position where the base 101 faces the first reflective layer 109; the first scattering region 121 is also used to transmit another part of the light emitted by the light-emitting region 111 to the second scattering region 122, and the second scattering region 122 is used 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 used to output the received color-converted light through the positions where the base 101 faces the first region of the groove structure 102 and the position where the base 101 faces the first reflective layer 109. In this way, light is output from the position where the base 101 faces the first region of the groove structure 102 (i.e., the central region of the base 101) and the region where the base 101 faces the first reflective layer 109 (i.e., the regions on both sides of the central region of the base 101). Therefore, no black regions will appear in the middle and on both sides of the light-emitting area of the light-emitting substrate. Thus, when the display device is ultra-thin, it is possible to make the light-emitting area of the light-emitting substrate emit light evenly.

[0090] Further, on the basis of Figure 10 the corresponding embodiment, the height of the scattering layer 120 perpendicular to the base 101 is greater than 25 μm and less than 150 μm. For example, the height of the scattering layer 120 perpendicular to the base 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 perpendicular to the base 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 perpendicular to the base 101 is less than 150 μm, the thickness of the entire display device can be relatively thin.

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

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

[0093] Exemplarily, the refractive index of the low-refractive-index material layer ranges from 1.2 to 1.3, and the U-shaped nano-fiber is a high-refractive-index material with a refractive index of more than 2.0. In this way, total internal reflection can occur when the color-converted light is transmitted into the U-shaped nano-fiber, and the U-shaped nano-fiber has a light guiding function. Further, when the light color-converted by the color conversion layer 105 is reflected onto the U-shaped nano-fiber, it can be conducted out from one end of the opening of the U-shaped nano-fiber. Also, since the opening of each U-shaped nano-fiber faces the substrate 101, the light color-converted by the color conversion layer 105 can be reflected onto the U-shaped nano-fiber and conducted to the substrate 101 for output.

[0094] In addition, the embodiment of the present application further provides a display device, including a display panel and the light-emitting substrate provided in the first aspect of the present application, and the light-emitting substrate is used to provide backlight for the display panel.

[0095] In the above description, technical details such as the layout of each layer are not described in detail. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of the required shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not exactly the same as the methods described above. In addition, although the above embodiments are described separately, this does not mean that the measures in each embodiment cannot be used in combination advantageously.

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

[0097] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to cover these modifications and variations.

Claims

1. A light-emitting substrate, characterized in that, the light-emitting substrate includes: a substrate, on one side of the substrate, there is a groove structure, the bottom of the groove structure includes a first region and a second region, and the orthographic projection of the first region on the substrate is located within the orthographic projection of the second region on the substrate; a first reflective layer, which 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; 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 region of each light-emitting component corresponds to one of the light-emitting openings; a color conversion layer, which is disposed in the groove structure, and the orthographic projection of the light-emitting opening on the substrate overlaps with the orthographic projection of the first region of the groove structure on the substrate; the light-emitting substrate further includes a reflective structure and a light guide column, both the light guide column and the reflective structure are disposed in the groove structure, the orthographic projection of the light guide column on the substrate overlaps with the orthographic projection of the first region 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 region of the groove structure on the substrate.

2. The light-emitting substrate according to claim 1, characterized in that, the reflective structure is a second reflective layer, the second reflective layer covers the side of the groove structure close to the color conversion layer; the extending direction of the cross-section of the light guide column is perpendicular to the light-emitting component, one end of the light guide column contacts the groove structure, and the orthographic projection of the light guide column on the substrate is located within the orthographic projection of the first region of the groove structure on the substrate.

3. The light-emitting substrate according to claim 2, characterized in that, the number of the light guide columns is multiple, the multiple light guide columns are arranged at intervals, and one end of each light guide column passes through the second reflective layer and contacts the groove structure.

4. The light-emitting substrate according to claim 2, characterized in that, the groove structure includes a first groove and a second groove, both the first groove and the second groove are arc-shaped grooves, one side of the first groove is connected to one side of the second groove, and the second reflective layer covers the positions of the first groove and the second groove in the first region.

5. The light-emitting substrate according to claim 1, characterized in that, the reflective structure is a second reflective layer, the light guide column is disposed in the groove structure, the extending direction of the cross-section of the light guide column is inclined in a 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.

6. The light-emitting substrate according to claim 5, characterized in that, the number of the light guide columns is multiple, the multiple light guide columns are arranged at intervals, and the distance between two adjacent light guide columns is greater than 2 μm and less than 4 μm.

7. The light-emitting substrate according to claim 5, wherein, the groove structure includes a first groove and a second groove, both the first groove and the second groove are arc-shaped grooves, one side of the first groove is connected to one side of the second groove, and the second reflective layer covers the positions of the first groove and the second groove in the first region.

8. The light-emitting substrate according to any one of claims 2-7, 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.

9. The light-emitting substrate according to claim 1, wherein, the reflective structure is a scattering layer, a through hole is provided at a position of the color conversion layer facing the first region of the groove structure, the light guide column is located in the through hole, and a hollow opening is formed by spacing the light guide column from the inner wall of the through hole, and the scattering layer is provided 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.

10. The light-emitting substrate according to claim 9, wherein, 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.

11. The light-emitting substrate according to claim 9, wherein, the scattering layer includes a plurality of reflective particles and a light guiding layer, and the plurality of reflective particles are distributed in the light guiding layer.

12. The light-emitting substrate according to claim 1, wherein, both the reflective structure and the light guide column are scattering layers, a through hole is provided at a position of the color conversion layer facing the first region of the groove structure, and the scattering layer is filled in the through hole; wherein, the scattering layer includes a frustum-shaped first scattering region and a frustum-shaped second scattering region, the bottom surface with a smaller diameter of the first scattering region is in contact with the bottom surface with a smaller diameter of the second scattering region, and the second scattering region is closer to the substrate than the first scattering region.

13. The light-emitting substrate according to claim 12, wherein, the scattering layer includes a plurality of reflective particles and a light guiding layer, and the plurality of reflective particles are distributed in the light guiding layer.

14. The light-emitting substrate according to claim 12, wherein, the height of the scattering layer perpendicular to the substrate is greater than 25 μm and less than 150 μm.

15. The light-emitting substrate according to claim 1, wherein, the light-emitting substrate further includes a plurality of spaced-apart condenser lenses, and the plurality of spaced-apart condenser lenses are provided on a side of the first reflective layer close to the substrate.

16. The light-emitting substrate according to claim 1, wherein, The light-emitting substrate further includes a nano-fiber structure layer, which is disposed on the side of the first reflective layer close to the substrate. Wherein, the nano-fiber structure layer includes a plurality of U-shaped nano-fibers and a low-refractive-index material layer filled in the gaps between the plurality of U-shaped nano-fibers, and the opening of each U-shaped nano-fiber faces the substrate. The refractive index of the U-shaped nano-fiber is greater than that of the low-refractive-index material layer, and the difference between the refractive index of the U-shaped nano-fiber and the refractive index of the low-refractive-index material layer is greater than 0.

5.

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

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