Light-emitting panel, method for manufacturing light-emitting panel, and display apparatus

Abstract

A light-emitting panel, a manufacturing method for a light-emitting panel, and a display apparatus, which belong to the technical field of display. The light-emitting panel comprises: a transparent substrate, a light-emitting element disposed on the transparent substrate, and a first reflective structure and a second reflective structure which are located between the light-emitting element and the transparent substrate. The first reflective structure has a first opening, and the first opening is filled with a color conversion layer. The second reflective structure is located on the side of the first reflective structure away from the light-emitting element. The orthographic projection of the second reflective structure on the transparent substrate overlaps the orthographic projection of the color conversion layer on the transparent substrate.

Description

Light-emitting panel, method for manufacturing light-emitting panel, and display device Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a light-emitting panel, a method for manufacturing a light-emitting panel, and a display device. Background Art

[0002] In the field of display technology, small and medium-sized OLED (Organic Light-Emitting Diode) displays offer advantages over LCD (Liquid Crystal Display) displays in terms of brightness and cost, while being much thicker than OLED displays. In LCD displays, the thickness of the Mini-LED backlight accounts for 70% to 80% of the total thickness. To reduce the overall module thickness, the Mini-LED backlight thickness needs to be reduced to 0.53T, or even below 0.28T. However, even with this reduction, the uniformity of the Mini-LED backlight must be maintained to avoid bright spots.

[0003] Overview

[0004] Based on the background technology, the present disclosure provides a light-emitting panel, a method for manufacturing the light-emitting panel, and a display device.

[0005] A light-emitting panel is provided, comprising: a transparent substrate, a light-emitting element disposed on the transparent substrate, and a first reflective structure and a second reflective structure located between the light-emitting element and the transparent substrate; wherein:

[0006] The first reflective structure is disposed near the light emitting element and has a first opening. The first opening is filled with a color conversion layer, and the color conversion layer is configured to convert the color of light emitted by the light emitting element;

[0007] The second reflective structure is located on a side of the first reflective structure away from the light-emitting element, and an orthographic projection of the second reflective structure on the transparent substrate overlaps with an orthographic projection of the color conversion layer on the transparent substrate.

[0008] Exemplarily, a groove is formed on a side of the transparent substrate close to the light-emitting element, and a transparent layer is provided in the groove. The second reflective structure includes:

[0009] a first reflective layer located on a side of the transparent layer away from the light-emitting element, the first reflective layer being concave in an arc shape toward the light-emitting element;

[0010] The orthographic projection of the transparent layer on the transparent substrate overlaps with the orthographic projection of the first reflective structure on the transparent substrate, and covers the orthographic projection of the first opening on the transparent substrate and the orthographic projection of the first reflective layer on the transparent substrate;

[0011] The transparent layer is configured to refract the light incident on the color conversion layer into the first reflective structure, and the first reflective layer is configured to reflect the light leaked from the color conversion layer to the transparent substrate back to the second reflective structure.

[0012] Exemplarily, the orthographic projections of the two reflective structures on the transparent substrate completely cover the orthographic projections of the color conversion layer on the transparent substrate.

[0013] Exemplarily, an orthographic projection of the second reflective structure on the transparent substrate has an overlapping area with an orthographic projection of the first reflective structure on the transparent substrate.

[0014] Exemplarily, a target size of the overlapping region in the plane direction is less than or equal to 10 μm.

[0015] Exemplarily, a preset relationship is satisfied among the maximum vertical distance from the first reflective layer to the color conversion layer, the target size, the refractive index of the transparent substrate, and the refractive index of the medium on the light-emitting surface side of the transparent substrate;

[0016] The preset relationship is w1=hw×tan(asin(no / n1));

[0017] Wherein, w1 is the target size, hw is the maximum vertical distance, n1 is the refractive index of the transparent substrate, and no is the refractive index of the medium on the light-emitting surface side of the transparent substrate.

[0018] Exemplarily, the minimum distance from the first reflective layer to the side of the transparent substrate facing away from the light-emitting element is 0.5 to 0.85 times the distance from the color conversion layer to the transparent substrate.

[0019] Exemplarily, the orthographic projections of the transparent layer and the first reflective layer on the transparent substrate are both circular surfaces, the orthographic projection of the transparent layer on the target plane is two continuous circular segments, and the orthographic projection of the first reflective layer on the target plane overlaps with both of the circular segments; wherein the target plane is a plane parallel to the thickness direction of the transparent substrate, the first reflective layer has a pointed cone, and the orthographic projection of the pointed cone on the target plane is located at the connection between the two circular segments;

[0020] There is a distance between the pointed cone and the side of the transparent substrate facing away from the light-emitting element, and there is a maximum vertical distance between the arc-shaped reflective layer and the color conversion layer, and the distance is 0.8 to 1 times of the maximum vertical distance.

[0021] Exemplarily, the orthographic projection of the first reflective layer on the target plane is an axisymmetric figure.

[0022] Exemplarily, the first reflective structure includes:

[0023] a light homogenizing structure, formed on a side of the transparent substrate close to the light-emitting element, and having a second opening;

[0024] The columnar structure is provided with the first opening, wherein the orthographic projection of the second opening on the transparent substrate overlaps with the orthographic projection of the first opening on the transparent substrate.

[0025] Exemplarily, the light uniformity structure includes:

[0026] A light dodging layer is formed on a side of the transparent substrate close to the light emitting element, wherein the second opening is provided in the light dodging layer.

[0027] a second reflective layer, located on a side of the light dodging layer facing away from the transparent substrate, wherein an orthographic projection of the second reflective layer on the transparent substrate overlaps with an orthographic projection of the light dodging layer and the second opening on the transparent substrate;

[0028] The second reflective layer is provided with a third opening, and the orthographic projection of the third opening on the transparent substrate is located within the orthographic projection of the second opening on the transparent substrate and overlaps with the orthographic projection of the first opening on the transparent substrate;

[0029] Part or all of the columnar structure is located on a side of the second reflective layer away from the transparent substrate.

[0030] Exemplarily, the orthographic projection of the second reflective layer on the transparent substrate overlaps with the orthographic projection of the columnar structure on the transparent substrate, and overlaps with the orthographic projection of the second reflective layer on the transparent substrate, and does not overlap with the orthographic projection of the light-uniform layer on the transparent substrate.

[0031] Exemplarily, the reflectivity of the columnar structure is equal to or higher than the reflectivity of the second reflective layer.

[0032] Exemplarily, the distance between the light-dodging layer and the edge of the second reflective structure is 0-5 μm.

[0033] Exemplarily, the second reflective layer includes:

[0034] a first reflective sublayer, located on a side of the light-dodging layer facing away from the transparent substrate;

[0035] a second reflective sublayer, located on a side of the first reflective sublayer facing away from the transparent substrate;

[0036] The stiffness of the first reflective sublayer is greater than the stiffness of the second reflective sublayer.

[0037] Exemplarily, the first opening is a trapezoidal opening, and the diameter of the first opening gradually decreases in a vertical direction from the transparent substrate toward the light-emitting element.

[0038] Among them, there is also a method for manufacturing a light-emitting panel, wherein, for preparing any of the light-emitting panels described above, the method comprises:

[0039] Providing a transparent substrate, forming a first reflective structure and a second reflective structure on the transparent substrate; wherein the first reflective structure has a first opening;

[0040] filling the first opening with a color conversion material to form a color conversion layer;

[0041] A light-emitting element is formed on a side of the color conversion layer facing away from the transparent substrate.

[0042] Exemplarily, forming the first reflective structure and the second reflective structure on the transparent substrate includes:

[0043] forming a light-dotting layer having a second opening on the transparent substrate;

[0044] patterning a mask layer on a side of the light-dominating layer facing away from the transparent substrate, and performing etching based on the mask layer to form an arc-shaped groove, wherein the arc-shaped groove is exposed by the second opening;

[0045] Using the mask layer as a mask, sequentially depositing a reflective material and filling with a transparent material to form the second reflective structure;

[0046] A columnar structure having the first opening is formed on a side of the transparent layer facing away from the transparent substrate to obtain the first reflective structure.

[0047] Exemplarily, forming a columnar structure having the first opening on a side of the transparent layer facing away from the transparent substrate to obtain the first reflective structure includes any one of the following:

[0048] After washing away the mask layer and the reflective material deposited on the mask layer, forming a columnar structure having the first opening on a side of the transparent layer facing away from the transparent substrate;

[0049] forming a columnar structure having the first opening on the reflective material located on the mask layer;

[0050] Washing off the mask layer and the reflective material deposited on the mask layer, and forming a second reflective layer having a third opening on a side of the light-dodging layer away from the transparent substrate, and forming the columnar structure on a side of the second reflective layer away from the transparent substrate;

[0051] Wherein, all or part of the columnar structure is stacked on the second reflective layer, and the orthographic projection of the third opening on the transparent substrate is located within the orthographic projection of the second opening on the transparent substrate.

[0052] A display device is also provided, wherein the display device includes a display substrate and any one of the light-emitting panels described above that cooperates with the display substrate.

[0053] The light-emitting panel provided above comprises: a transparent substrate, a light-emitting element arranged on the transparent substrate, and a first reflective structure and a second reflective structure located between the light-emitting element and the transparent substrate; wherein,

[0054] The first reflective structure is arranged near the light-emitting element and has a first opening. A color conversion layer is filled in the first opening. The color conversion layer is configured to convert the color of the light reflected by the light-emitting element. The second reflective structure is located on the side of the first reflective structure away from the light-emitting element. The orthographic projection of the second reflective structure on the transparent substrate overlaps with the orthographic projection of the color conversion layer on the transparent substrate. Thus, through the structural design of the first reflective structure and the second reflective structure, the second reflective structure can reflect the light leaked from the color conversion layer to the transparent substrate back to the first reflective structure, wherein the light leaked from the color conversion layer to the first reflective structure can be refracted to the first reflective structure. The first reflective structure can uniformly reflect the light reflected and refracted by the second reflective structure to the transparent substrate along the plane direction of the transparent substrate. Thus, through the first reflective structure and the second reflective structure, the light emitted by the light-emitting element can be uniformly emitted to the transparent substrate, avoiding the problem of bright spots caused by the light of the color conversion layer directly leaking to the transparent substrate, thereby improving the uniformity of the light output of the light-emitting panel.

[0055] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below.

[0056] BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for the description of the embodiments or related technologies. Obviously, the drawings described below are some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. It should be noted that the scales in the drawings are for illustration only and do not represent the actual scale.

[0058] FIG1 shows a schematic cross-sectional structure diagram of a light-emitting panel in the related art;

[0059] FIG2 is a schematic diagram showing brightness distribution of a light-emitting panel in the related art;

[0060] FIG3 shows a schematic cross-sectional structure diagram of a light-emitting panel in an embodiment of the present disclosure;

[0061] FIG4 shows a schematic cross-sectional structure diagram of another light-emitting panel in an embodiment of the present disclosure;

[0062] FIG5 shows a schematic cross-sectional structure diagram of another light-emitting panel according to an embodiment of the present disclosure;

[0063] FIG6-1 and FIG6-2 are schematic cross-sectional views of two light-emitting panels according to an embodiment of the present disclosure;

[0064] FIG7 a is a schematic diagram showing the relationship between the target size of the overlapping area and the light emission energy of the light emitting element in an embodiment of the present disclosure;

[0065] FIG7 b is a schematic diagram showing the relationship between the minimum distance of the first reflective layer and the influence of the bright spot in an embodiment of the present disclosure;

[0066] FIG7 c is a schematic diagram showing the relationship between the height of the pointed cone of the first reflective layer and the influence of the bright spot in an embodiment of the present disclosure;

[0067] FIG8 a shows a schematic cross-sectional structure diagram of another light-emitting panel in an embodiment of the present disclosure;

[0068] FIG8b shows a schematic diagram of the top view of the light emitting panel in FIG8a

[0069] FIG9 shows a schematic cross-sectional view of a light-emitting panel with an eaves structure according to an embodiment of the present disclosure;

[0070] FIG10 shows a schematic cross-sectional view of another light-emitting panel with an eaves structure according to an embodiment of the present disclosure;

[0071] FIG11 is a schematic diagram showing a change in the first opening of the light-emitting panel shown in FIG10 ;

[0072] FIG12 is a schematic diagram showing changes in light extraction efficiency of the light-emitting panel when the first opening is an inverted trapezoid and an upright trapezoid;

[0073] FIG13 shows a schematic cross-sectional structure diagram of a light-emitting panel A in an example;

[0074] FIG14 shows a schematic cross-sectional structure diagram of a light-emitting panel B in an example;

[0075] FIG15 shows a schematic cross-sectional structure diagram of a light-emitting panel C in an example;

[0076] FIG16 shows a schematic cross-sectional structure diagram of a light-emitting panel D in an example;

[0077] FIG17 shows a schematic diagram of the preparation process of the light-emitting panel A;

[0078] 18a to 18d are schematic top views of the light-emitting panel A during the preparation process.

[0079] Description of reference numerals:

[0080] 1', glass substrate; 2', color conversion material; 3', wave dot uniform light structure; 4', LED light-emitting element; 100, transparent substrate; 200, first reflective structure; 300, second reflective structure; 400, light-emitting layer; 401, light-emitting element; 500, color conversion layer; 600, copper lead column; 700, electrode; 800, transparent adhesive layer; 900, protective layer; 301, transparent layer; 302, first reflective layer; 201, uniform light layer; 202, columnar structure; 2011, second opening; 2021, first opening; 2033, third opening; 2012, microstructure; 203, second reflective layer; 2031, first reflective sublayer; 2032, second reflective sublayer; 311, Mo inner ring; 501, packaging layer.

[0081] Detailed description

[0082] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0083] In the related art, a Mini-LED light-emitting panel is proposed. The light-emitting panel can significantly reduce the thickness of the overall light-emitting panel through the transmission structure of the folded waveguide. As shown in Figures 1 and 2, Figure 1 shows a schematic diagram of the cross-sectional structure of the light-emitting panel in the related art, and Figure 2 shows a schematic diagram of the brightness distribution of the light-emitting panel in the related art.

[0084] As shown in FIG1 , the device includes a light-emitting element 4′ and a glass substrate 1′. A dot-dot light-homogenizing structure 3′ and an arc-shaped groove are provided on the glass substrate 1′. The arc-shaped groove is filled with a color-converting material. As indicated by the arrows in FIG1 , light emitted by the light-emitting element enters the groove. After the color of the light is converted by the color-converting material in the groove, part of the converted light is refracted into the dot-dot light-homogenizing structure, while the other part directly leaks out from the bottom of the groove and exits the glass substrate. The dot-dot light-homogenizing structure performs waveguide homogenization on the light refracted from the groove. Thus, after the light emitted by the light-emitting element excites the color-converting material, the light entering the glass substrate is divided into two parts: one part propagates within the glass substrate in a waveguided manner and is homogenized by the dot-dot light; the other part exits directly below the groove. Because the directly emitted part is closest to the groove and has the highest energy, and the emitted light is concentrated in a small area directly below the groove, the brightness of this area is much higher than that of other areas, forming a bright spot. Consequently, the brightness uniformity of the light-emitting panel is low. Through simulation tests, the inventors found that the brightness uniformity is less than 1%.

[0085] It should be noted that waveguide light homogenization means guiding light to propagate in a direction parallel to the glass substrate, and reflecting the light to the glass substrate through the bumps during the propagation process, thereby uniformly reflecting the light in the planar direction of the glass substrate.

[0086] In view of the above problems, the inventors have proposed a solution to improve the brightness uniformity of the light-emitting panel by adopting a transmission structure with a folded waveguide. The main improvement of this solution is as follows: a first reflective structure and a second reflective structure are sequentially arranged on the light emission path from the light-emitting element to the transparent substrate, and a color conversion material is arranged in the opening of the first reflective structure. The light directly leaked from the color conversion material to the transparent substrate is reflected back to the first reflective structure by the second reflective structure. The waveguide uniformity of the first reflective structure is used to convert the directly leaked light into light uniformly reflected toward the transparent substrate, thereby reducing the proportion of light directly leaked from under the color conversion material and improving the brightness uniformity of the light-emitting panel.

[0087] 3 , a schematic cross-sectional structure diagram of a light-emitting panel in an embodiment of the present disclosure is shown. As shown in FIG3 , the light-emitting panel may be a mini-LED, comprising a transparent substrate 100, a light-emitting element 401 disposed on the transparent substrate 100, and a first reflective structure 200 and a second reflective structure 300 located between the light-emitting element 401 and the transparent substrate 100;

[0088] The first reflective structure 200 is disposed close to the light emitting element and has a first opening 2021 . The first opening 2021 is filled with a color conversion layer 500 . The color conversion layer 500 is configured to convert the color of light emitted by the light emitting element.

[0089] The second reflective structure 300 is located on a side of the first reflective structure 200 away from the light emitting element 401 , and the orthographic projection of the second reflective structure 300 on the transparent substrate 100 overlaps with the orthographic projection of the color conversion layer 500 on the transparent substrate.

[0090] The second reflective structure is configured to reflect light leaking from the color conversion layer toward the transparent substrate back to the first reflective structure, and the first reflective structure is configured to uniformly reflect the light reflected from the second reflective structure toward the transparent substrate along the plane of the transparent substrate. In some examples, a transparent layer is further disposed between the second reflective structure and the color conversion layer, which can refract light emitted from the color conversion layer toward the first reflective structure.

[0091] In this example, the transparent substrate can be a glass substrate or a substrate made of other materials with high transparency. A plurality of light-emitting elements 401 can be arranged in an array on the transparent substrate. An optical structure can be provided between each light-emitting element 401 and the transparent substrate 100. The optical structure can be used to guide the light emitted by the light-emitting element to undergo color conversion and then be uniformly reflected onto the transparent substrate. The optical structure corresponding to each light-emitting element can include the first and second reflective structures described above, or the optical structures corresponding to some light-emitting elements can include the first and second reflective structures described above, and the optical structures corresponding to the remaining light-emitting elements can include color conversion materials and dot uniform light structures. Alternatively, when the optical structures corresponding to each light-emitting element can include the first and second reflective structures described above, there can be slight differences between the optical structures of the light-emitting elements. The differences can be manifested in the first reflective structure, the second reflective structure, or both the first and second reflective structures. For details, please refer to the explanation in the subsequent examples.

[0092] In this example, the light-emitting element may be an LED light-emitting element, wherein the first reflective structure and the second reflective structure are located between the light-emitting element and the transparent substrate. Specifically, in the light emission direction from the light-emitting element to the transparent substrate, as indicated by the arrows in FIG3 , the first reflective structure and the second reflective structure may be sequentially arranged.

[0093] The first reflective structure may be provided with a first opening 2021 , which is filled with a color conversion material to form a color conversion layer. The color conversion material may be a QD (quantum dot) material for converting the color of light emitted by the light emitting element.

[0094] In which, the second reflective structure is located on the side of the first reflective structure away from the light-emitting element, specifically, it can be located on the side of the first opening away from the light-emitting element, wherein the orthographic projection of the second reflective structure on the transparent substrate can overlap with the orthographic projection of the color conversion layer on the transparent substrate. The overlap can mean that the orthographic projection of the second reflective structure on the transparent substrate is covered by the orthographic projection of the color conversion layer on the transparent substrate. In practice, at least the orthographic projection of the second reflective structure on the transparent substrate must cover the central area of ​​the orthographic projection of the color conversion layer on the transparent substrate. Thus, the second reflective structure can be located directly below the color conversion layer, so that it can reflect the light that directly leaks from the color conversion layer to the transparent substrate.

[0095] Alternatively, in some examples, the orthographic projection of the second reflective structure on the transparent substrate may overlap with the orthographic projection of the first reflective structure on the transparent substrate, thereby allowing the light reflected by the second reflective structure to be reflected by the first reflective structure as much as possible, thereby improving the uniform light effect.

[0096] The first reflective structure can be composed of a reflective material layer formed on a transparent substrate. The reflective material used can be a metal material with high reflectivity, such as silver or aluminum. The size of the first opening in the first reflective structure can be set as needed. Generally speaking, the orthographic projection of the first opening on the transparent substrate can cover the orthographic projection of the light-emitting element on the transparent substrate. After the color conversion layer is filled in the first opening, the orthographic projection of the color conversion layer on the transparent substrate can also cover the orthographic projection of the light-emitting element on the transparent substrate.

[0097] In some examples, a transparent structure can be further provided between the second reflective structure and the color conversion layer. The transparent structure can refract light leaked from the color conversion layer to the first reflective structure to the first reflective structure. The second reflective structure can be located on the side of the transparent structure away from the light-emitting element. Thus, the light incident on the color conversion layer first enters the transparent structure and is refracted to the first reflective structure by the transparent structure. Then, the remaining light that is not refracted back to the first reflective structure can be reflected back to the first reflective structure by the second reflective structure after encountering the second reflective structure.

[0098] By using the light-emitting panel of this example, the proportion of light directly leaking to the transparent substrate after color conversion by the color conversion layer can be reduced through the design of the second reflective structure, and most of the light leaking to the transparent substrate can be reflected back to the first reflective structure for waveguide uniformity; thus, through the first reflective structure and the second reflective structure, the light emitted by the light-emitting element can be evenly emitted to the transparent substrate, avoiding the problem of bright spots caused by the light of the color conversion layer directly leaking to the transparent substrate, thereby improving the light uniformity of the light-emitting panel.

[0099] In one example, a transparent substrate may have a groove, the first reflective structure may be located as a whole on the transparent substrate, and the first opening formed may expose the groove. Referring to Figure 4, a schematic diagram of the cross-sectional structure of the light-emitting panel in this example is shown. The positive projection of the groove on the transparent substrate may cover the first opening, or be covered by the first opening. As shown in Figure 4, the positive projection of the groove on the transparent substrate is covered by the first opening, and the projection of the groove on the plane in the thickness direction of the transparent substrate is a circular segment. A color conversion material is filled in the groove to form a color conversion layer. Therefore, the projection of the color conversion layer on the plane in the thickness direction of the transparent substrate is also a circular segment.

[0100] The first reflective structure can include a first reflective material layer 200 located on the side of the transparent substrate near the light-emitting element, with a first opening defined in the first reflective material layer. The second reflective structure is embedded within the transparent substrate and located below the recess. Thus, a color conversion layer 500 and a second reflective structure are sequentially formed below the first opening. The second reflective structure can be composed of a second reflective material layer 300 embedded within the transparent substrate, at a predetermined distance from the color conversion layer. A portion of the transparent substrate can be located between the second reflective material layer 300 and the color conversion layer.

[0101] In this example, the orthographic projection of the second reflective material layer on the transparent substrate may cover the orthographic projection of the color conversion layer on the transparent substrate, and overlap with the orthographic projection of the first reflective material layer on the transparent substrate.

[0102] It should be noted that the first reflective material layer may be a waveguide light homogenizing structure, which is used to guide light to be transmitted in a direction parallel to the transparent substrate, and is uniformly reflected to the transparent substrate during the transmission process.

[0103] In one implementation of this example, as shown in FIG4 , the first reflective material layer near the first opening overlaps with the second reflective material layer. For example, the orthographic projection of the second reflective material layer on the transparent substrate can be circular, and the orthographic projection of the color conversion layer on the transparent substrate can also be circular. The two circles can share a common center, and the orthographic projection of the second reflective material layer on the transparent substrate can also overlap with the first reflective material layer. Thus, an overlapping region between the first and second reflective material layers can be formed around the color conversion layer, so that light leaking toward the transparent substrate can be reflected back into the first reflective material layer.

[0104] In one implementation of this example, based on the glass etching process, the orthographic projection of the groove on the plane in the thickness direction of the transparent substrate can be multiple intersecting circular segments. For details, please refer to the example of the subsequent Figure 8a. In this example, the orthographic projection of the groove on the transparent substrate can still be a circle, and its radius can be 320μm.

[0105] With this exemplary first and second reflective structures, light that leaks directly from the color conversion layer toward the transparent substrate is reflected back toward the first reflective material layer 200 by the second reflective material layer 300. This light is then evenly reflected back toward the transparent substrate by the first reflective material layer, thereby reducing the energy of the light that leaks directly toward the transparent substrate, lowering the brightness of bright spots and improving uniformity. Furthermore, because the color conversion layer is circular in shape along the thickness of the transparent substrate, the color-converted light in the color conversion layer can also be refracted through the grooves toward the first reflective material layer, achieving waveguide homogenization of the light.

[0106] In a further example, a second reflective structure can be formed in the groove, and a transparent structure can also be formed in the groove, and the color conversion layer can be located on the side of the transparent structure facing away from the transparent substrate. Referring to FIG5 , a schematic cross-sectional structure diagram of the light-emitting panel in this example is shown. As shown in FIG5 , a groove is formed on the side of the transparent substrate close to the light-emitting element, and the second reflective structure is formed in the groove. The light-emitting substrate can also include a transparent layer 301 disposed in the groove. The second reflective structure can include a first reflective layer 302 located on the side of the transparent layer facing away from the light-emitting element, with the first reflective layer 302 being arc-shaped and concave toward the light-emitting element.

[0107] The orthographic projection of the transparent layer on the transparent substrate overlaps with the orthographic projection of the first reflective structure on the transparent substrate, and covers the orthographic projection of the first opening on the transparent substrate and the orthographic projection of the first reflective layer on the transparent substrate.

[0108] The transparent layer is configured to refract light incident on the color conversion layer into the first reflective structure, and the first reflective layer is configured to reflect light leaking from the color conversion layer to the transparent substrate back to the second reflective structure.

[0109] In this example, when forming the second reflective structure, a groove can be first formed on the side of the transparent substrate close to the light-emitting element. The projection of the groove on the plane in the thickness direction of the transparent substrate is a circular segment, as shown in Figure 5. Then, a first reflective layer is formed in the groove. After the first reflective layer is formed, a transparent material is filled in the groove to form a transparent layer. Among them, due to the curved bottom surface of the groove, the formed first reflective layer is curved and concave toward the light-emitting element, and the shape of the transparent layer is adapted to the first reflective layer and the groove. As shown in Figure 5, the orthographic projection of the transparent layer on the target plane is a circular segment. The orthographic projection of the first reflective layer on the target plane can be a partial boundary of the circular segment. The target plane is a plane parallel to the thickness direction of the transparent substrate. Of course, in practice, the orthographic projection of the transparent layer on the target plane may not be a circular segment, but other shapes with a curvature.

[0110] In this example, the orthographic projection of the first reflective layer on the transparent substrate may be covered by the orthographic projection of the color conversion layer on the transparent substrate.

[0111] Among them, based on the process of etching the groove, the orthographic projection of the groove on the target plane can be multiple intersecting circular segments, that is, the bottom of the groove can be multiple continuous arc surfaces. Of course, whether it includes a single arc surface or multiple arc surfaces, the orthographic projection of the transparent layer on the transparent substrate, the orthographic projection of the covering color conversion layer on the transparent substrate and the orthographic projection of the first reflective layer on the transparent substrate, and the orthographic projection of the transparent layer on the transparent substrate can overlap with the orthographic projection of the first reflective structure on the transparent substrate.

[0112] In one configuration of the first reflective layer, the orthographic projection of the first reflective layer on the transparent substrate can overlap with the orthographic projection of the color conversion layer on the transparent substrate. This overlapping area can be the area directly below the color conversion layer, as shown in Figure 5, such as the area where the color conversion layer directly leaks light toward the transparent substrate. Figure 5 illustrates the distribution of the first reflective layer, which is located directly below the color conversion layer. Its orthographic projection on the transparent substrate can be covered by the orthographic projection of the color conversion layer on the transparent substrate. Specifically, the side of the color conversion layer closest to the transparent substrate can cover the first reflective layer. Thus, the first reflective layer can reflect light that directly leaks from the color conversion layer toward the transparent substrate back to the first reflective structure.

[0113] In this example of the light-emitting panel, the side edges of the color conversion layer in the first opening are surrounded by the first reflective structure. Thus, the color conversion layer is surrounded by a reflective structure. As shown by the arrow in FIG5 , the first reflective structure can reflect the light after the color conversion by the color conversion layer is color-converted into the transparent layer. At the same time, the light after the color conversion by the color conversion layer can also directly enter the transparent layer. Part of the light entering the transparent layer can be refracted into the first reflective structure, and another part of the light (light leaking from the color conversion layer to the transparent substrate) can be reflected back to the first reflective structure by the first reflective layer; then, it is evenly reflected to the transparent substrate by the first reflective structure.

[0114] In this example, the light-emitting panel utilizes a color conversion layer positioned above the groove, forming a transparent layer and a first reflective layer within the groove. This increases the light-emission distance between the color conversion layer and the transparent substrate compared to arrangements where the color conversion layer is positioned within the groove. The transparent layer and first reflective layer, arranged sequentially along the optical path between the color conversion layer and the transparent substrate, guide light evenly toward the transparent substrate, thereby improving brightness uniformity across the transparent substrate. Furthermore, the first reflective layer is designed as a curved, concave reflective surface, which reflects light that leaks from the color conversion layer toward the transparent substrate in all directions. This reduces the energy proportion of light that directly leaks toward the transparent substrate, allowing light emitted from the color conversion layer to be uniformly waveguided, further ensuring brightness uniformity across the transparent substrate.

[0115] In one example, the surface of the transparent layer close to the color conversion layer can be a flattened surface, thereby facilitating uniform filling of the color conversion material. The transparent layer can support the color conversion layer and refract light, thereby improving the process quality of the light-emitting panel.

[0116] As described above, the orthographic projection of the first reflective layer on the transparent substrate may cover a portion of the orthographic projection of the color conversion layer on the transparent substrate, such as a portion of the color conversion layer close to a side of the transparent substrate.

[0117] In a further example of this embodiment, one method in which the orthographic projection of the first reflective layer on the transparent substrate overlaps with the orthographic projection of the color conversion layer on the transparent substrate is such that the orthographic projection of the first reflective layer on the transparent substrate completely covers the orthographic projection of the color conversion layer on the transparent substrate. In this way, the first reflective layer can fully reflect light that leaks toward the transparent substrate, further improving the brightness uniformity of the light-emitting panel.

[0118] In a further example of this embodiment, another way in which the orthographic projection of the first reflective layer on the transparent substrate overlaps with the orthographic projection of the color conversion layer on the transparent substrate is that the orthographic projection of the first reflective layer on the transparent substrate has an overlapping region with the orthographic projection of the first reflective structure on the transparent substrate. In this example, in addition to overlapping with the orthographic projection of the cover color conversion layer on the transparent substrate, the orthographic projection of the first reflective layer on the transparent substrate may also have an overlapping region with the orthographic projection of the first reflective structure on the transparent substrate.

[0119] 6-1 and 6-2 , schematic cross-sectional structures of several light-emitting panels are shown.

[0120] As shown in FIG6-1 , the orthographic projection of the first reflective layer 302 on the transparent substrate may have an overlapping area with the orthographic projection of the first reflective structure 200 on the transparent substrate. Specifically, the first reflective layer is located in the area directly below the color conversion layer, and one end of the first reflective layer is extended to have an overlapping area with the first reflective structure, while the other end does not need to be extended to have an overlapping area with the first reflective structure. In this case, the orthographic projection of the first reflective layer on the transparent substrate is covered by the orthographic projection of the color conversion layer on the transparent substrate, and has an overlapping area with the orthographic projection of the first reflective structure on the transparent substrate. With this structure, the first reflective layer can reflect light leaked from the color conversion layer to the transparent substrate back to the first reflective structure, but still allow a small amount of light leaked from the color conversion layer to the transparent substrate to be transmitted out. A light-emitting panel with this design can ensure the luminous brightness of part of the display area as needed. For example, if some specific display areas require stronger luminous brightness and have a higher tolerance for bright spots, this setting can be adopted.

[0121] As shown in FIG6-2 , the first reflective layer 302 is located directly below the color conversion layer, and both ends of the first reflective layer are extended to have an overlapping area w1 with the first reflective structure. The sizes of the overlapping areas on both sides can be the same or different. Thus, the orthographic projection of the first reflective layer on the header substrate completely covers the orthographic projection of the color conversion layer on the transparent substrate, but does not completely cover the transparent layer. In this case, the first reflective layer can reflect all light leaking from the color conversion layer to the transparent substrate back to the first reflective structure. The light-emitting panel using this design can ensure that the light emitted by the light-emitting element is evenly transmitted to the light-emitting surface of the transparent substrate.

[0122] As described above, since each light-emitting element corresponds to a first reflective structure and a second reflective structure, and there may be slight differences between the optical structures of the light-emitting elements, one difference may be reflected in the design difference of the first reflective layer. For example, the first reflective layer corresponding to some light-emitting elements is located directly below the color conversion layer and is covered by the color conversion layer. One end of the first reflective layer is extended to have an overlapping area with the first reflective structure, and the other end does not need to be extended to have an overlapping area with the first reflective structure; while the first reflective layer corresponding to other light-emitting elements completely covers the color conversion layer and has an overlapping area with the first reflective structure.

[0123] As shown in Figure 6-2, the size of the overlapping region w1 can be customized. Generally speaking, the size of the overlapping region is related to the degree to which the first reflective layer reflects light leaking from the color conversion layer to the transparent layer. Therefore, the size of the overlapping region is related to the brightness and brightness uniformity of the light-emitting panel. Generally speaking, a larger overlapping region effectively reduces the brightness of the direct light leakage area. In one example, the target planar size of the overlapping region w1 is less than or equal to 10 μm.

[0124] As shown in Figure 6-2, the target size of the overlapping area can be the size of the overlapping area in the radial direction of the transparent layer, that is, the size in the longitudinal extension direction of the transparent substrate. As mentioned above, since each light-emitting element has a first reflective structure and a second reflective structure, and there may be slight differences between the optical structures of the light-emitting elements, another difference can be reflected in the design differences of the overlapping area, such as the overlapping area corresponding to the first reflective layer of some light-emitting elements is 1μm, the overlapping area corresponding to the first reflective layer of other light-emitting elements is 10μm, and the overlapping area corresponding to the first reflective layer of some light-emitting elements is 5μm. In other words, the target sizes of the overlapping areas corresponding to multiple light-emitting elements may be different and distributed in the range of 0 to 10μm.

[0125] In practice, the larger the target size of the overlapping area, the stronger the reflection of the light leaking from the color conversion layer to the transparent substrate. In other words, the higher the proportion of light emitted by the color conversion layer that is homogenized by the waveguide, the higher the brightness uniformity of the light-emitting panel.

[0126] Referring to Figure 7a, a schematic diagram illustrating the effect of the target size of the overlapping region on the light-emitting energy of the light-emitting element is shown. The reflective bowl in Figure 7a is a groove, the extended length of the reflective layer is the target size of the overlapping region, the left vertical axis represents the ratio of direct leakage energy to waveguide energy, and the right axis represents the total energy coupled into the light-emitting element. It can be seen that when the structure shown in Figure 6-2 is used, the proportion of energy directly leaking from the color conversion layer to the transparent substrate is relatively low. As the target size of the overlapping region increases, the proportion of waveguide energy increases, meaning that more light is homogenized by the waveguide. Furthermore, as the target size of the overlapping region increases, the proportion of total coupled energy decreases, meaning that more light is homogenized by the waveguide.

[0127] More specifically, in a further example, since the size of the overlapping region is related to the luminance and luminance uniformity of the light-emitting panel, where an excessively large overlapping region affects the luminance (light extraction efficiency) of the backplane, while a too small overlapping region affects luminance uniformity, the inventors discovered that when the target size of the overlapping region in the planar direction satisfies a certain relationship, luminance and luminance uniformity can be balanced, resulting in a luminance uniformity greater than 80%. Specifically, the second reflective structure, i.e., the maximum vertical distance from the first reflective layer to the color conversion layer, the target size, the refractive index of the transparent substrate, and the refractive index of the medium on the light-emitting surface of the transparent substrate, satisfy a predetermined relationship.

[0128] The preset relationship may be as shown in the following formula (1): w1=hw*tan(asin(no / n1));

[0129] In formula (1), w1 is the target size of the overlapping area, hw is the maximum vertical distance from the first reflective layer to the color conversion layer, that is, the depth of the groove, n1 is the refractive index of the transparent substrate, and no is the refractive index of the medium (hereinafter referred to as the output medium) into which the light enters after exiting the transparent substrate.

[0130] It can be seen from the above formula (1) that when the groove depth is determined and the materials of the transparent substrate and the output medium are certain, the target size of the overlapping area can be determined based on the groove depth, the refractive index of the transparent substrate and the output medium. The target size is the size at which the luminous brightness uniformity can be greater than 80% under the groove depth and the transparent substrate material.

[0131] By adopting this example, the brightness uniformity of the light-emitting panel can be improved while ensuring the light-emitting efficiency of the light-emitting panel.

[0132] In one example, for the second reflective structure, when the second reflective structure is the first reflective layer 302 or the second reflective material layer 300, its distance hm from the light-emitting surface of the transparent substrate is related to the brightness of the area directly below the color conversion layer (the area of ​​the transparent substrate covered by the first reflective layer). For example, the closer the first reflective layer is arranged to the light-emitting surface, the lower the brightness of the area directly below the color conversion layer. When the distance hm between the first reflective layer and the light-emitting surface increases, the brightness of the area directly below the color conversion layer can become higher.

[0133] In this example, the minimum distance hm from the first reflective layer to the side of the transparent substrate facing away from the light emitting element may be 0.5 to 0.85 times the distance hg from the color conversion layer to the transparent substrate.

[0134] As shown in Figure 6-2, the minimum distance from the first reflective layer to the side of the transparent substrate facing away from the light-emitting element is hm, and the distance from the color conversion layer to the transparent substrate is hg. Then, hm = (0.5-0.85) * hg. Specifically, the minimum distance can be the vertical distance from the point on the first reflective layer closest to the transparent substrate to the light-emitting surface of the transparent substrate (the light-emitting surface refers to the side of the transparent substrate facing away from the light-emitting element). The minimum distance can be 0.5 times, 0.85 times, or a multiple between 0.5 and 0.85, such as 0.7 times hg. In practice, the greater the distance, the higher the brightness of the area directly below the color conversion layer.

[0135] 7 b , a schematic diagram illustrating the relationship between the minimum distance of the first reflective layer and the influence of the bright spot is shown. As shown in FIG7 b , when the minimum distance increases, the brightness ratio increases, that is, both brightness uniformity and brightness are guaranteed.

[0136] As described above, since each light-emitting element has a first reflective structure and a second reflective structure, and the optical structures of the light-emitting elements can vary slightly, one type of difference can be reflected in the design differences in the minimum distance. Of course, when the minimum distances of all light-emitting elements are designed to be the same, the overall brightness uniformity of the light-emitting panel is better.

[0137] In another example, to enhance the brightness directly below the color conversion layer, the second reflective structure can be configured to improve the light extraction efficiency of light leaking from the color conversion layer by changing its morphology. Specifically, the first reflective layer can be configured to have a plurality of continuous curved surfaces.

[0138] 8a and 8b , which respectively illustrate a schematic cross-sectional view and a schematic top view of a light-emitting panel, as shown in FIG8a and FIG8b , the orthographic projections of the transparent layer and the first reflective layer on the transparent substrate are both circular surfaces. The orthographic projection of the transparent layer on the target plane is two continuous circular segments, and the orthographic projection of the first reflective layer on the target plane overlaps with both circular segments. The target plane is a plane parallel to the thickness direction of the transparent substrate, and the first reflective layer has a pointed cone, the orthographic projection of which on the target plane is located at the junction of the two circular segments.

[0139] The distance between the pointed cone and the side of the transparent substrate facing away from the light-emitting element is 0.8 to 1 times the maximum vertical distance between the first reflective layer and the color conversion layer.

[0140] Exemplarily, as shown in FIG8b , the orthographic projection of the transparent layer 301 on the transparent substrate is a circle, and the orthographic projection of the first reflective layer 302 on the transparent substrate is also a circle, and the orthographic projection of the transparent layer on the transparent substrate is co-centered with the circle. Wherein, the orthographic projection of the first opening on the transparent substrate is a circle, and the orthographic projection of the color conversion layer on the transparent substrate is also a circle, and the center point of the orthographic projection of the color conversion layer 500 on the transparent substrate coincides with the center of the circle. Thus, the first reflective layer can be located directly below the color conversion layer to reflect light that directly leaks toward the transparent substrate.

[0141] In this example, the groove can be two continuous arc-shaped grooves protruding toward one side of the transparent substrate, that is, the side of the transparent layer close to the transparent substrate is two arc surfaces. When viewed from the direction of the target plane, as shown in Figure 8a, that is, when viewed in the cross-sectional direction of the transparent substrate, the transparent layer is two continuous circular segments, wherein the connection point of the two circular segments can be located at the center point of the positive projection of the transparent layer on the transparent substrate, that is, the transparent layer is two symmetrical arc surfaces.

[0142] Among them, the shape of the orthographic projection of the first reflective layer on the transparent substrate is a circular surface, the center of which coincides with the center point of the orthographic projection of the transparent layer on the transparent substrate. The shape of the first reflective layer needs to adapt to the transparent layer. Therefore, the orthographic projection of the first reflective layer on the target plane overlaps with the two circular segments, so that it has a pointed cone, and the orthographic projection of the pointed cone on the target plane is located at the connection between the two circular segments.

[0143] Figuratively speaking, the second reflective layer and the transparent layer can be called a double reflective bowl structure, that is, it includes two reflective bowls, and the connection point of the two reflective bowls can be called a cone. The waveguide propagation of light can be broken by changing the height of the cone of the reflective bowl to achieve a light-collecting effect.

[0144] Specifically, the height of the tip of the first reflective layer is the distance hj between the tip and the side of the transparent substrate facing away from the light-emitting element, which reflects the distance between the tip and the color conversion layer. The first reflective layer has a maximum vertical distance to the color conversion layer, and the maximum vertical distance can reflect the depth of the first reflective layer. Specifically, referring to Figure 7c, a schematic diagram of the relationship between the height of the tip of the first reflective layer and the influence of the bright spot is shown. As shown in Figure 7c, when the proportion of the height of the tip of the cone to the maximum vertical distance is higher, the light extraction efficiency is higher and the brightness directly below the color conversion layer is higher.

[0145] Specifically, the following formula (2) can be used:

[0146] hj = (0.80-1.0) * (hg-hm); where hj is the height of the tip of the first reflective layer, i.e., the distance between the tip and the side of the transparent substrate facing away from the light-emitting element; hg is the distance from the color conversion layer to the side of the transparent substrate facing away from the light-emitting element; hm is the minimum vertical distance from the first reflective layer to the light-emitting surface of the transparent substrate; and the value of hg-hm is the maximum vertical distance between the first reflective layer and the color conversion layer.

[0147] The first reflective layer adapts to the shape of the transparent layer. As shown in FIG8 a , the orthographic projection of the first reflective layer on the target plane can be two continuous arcs, and the larger value of the vertical distance from the first reflective layer to the color conversion layer is used as the maximum vertical distance.

[0148] By using the second reflective structure in this example, it is possible to achieve a significant improvement in the brightness uniformity within the light-emitting area corresponding to the light-emitting element, which can be increased to a brightness uniformity of >82.2%.

[0149] When this second reflective structure is adopted, as shown in Figure 8a, the orthographic projection of the transparent layer on the transparent substrate covers the orthographic projection of the first opening on the transparent substrate, and overlaps with the orthographic projection of the first reflective structure on the transparent substrate. The orthographic projection of the first reflective layer on the transparent substrate can cover the orthographic projection of the color conversion layer on the transparent substrate, and overlaps with the orthographic projection of the first reflective structure on the transparent substrate.

[0150] In a further example of this embodiment, the orthographic projection of the first reflective layer on the target plane can be an axisymmetric shape. Accordingly, the orthographic projection of the transparent layer on the target plane can also be an axisymmetric shape. In this structure, the orthographic projection of the transparent layer on the transparent substrate can be cocentric with the orthographic projection of the first reflective layer on the transparent substrate, as shown in Figure 8b. In this case, the orthographic projection of the first reflective layer on the target plane is two continuous arcs with axisymmetry, as shown in Figure 8a. Alternatively, as shown in Figure 8a, the groove can be a symmetrical double-bowl structure, thereby also allowing the orthographic projection of the transparent layer on the target plane to be an axisymmetric shape. In the case of an axisymmetric first reflective layer, light leaking toward the transparent substrate can be reflected to the same degree around the light-emitting element, i.e., around the color conversion layer, thereby improving brightness uniformity in the area near the color conversion layer.

[0151] Of course, in other exemplary embodiments, the orthographic projection of the transparent layer on the target plane may also include multiple continuous circular segments, for example, including more reflective bowls, such as three or four. That is, the surface of the transparent layer closest to the transparent substrate includes three or four curved surfaces. Thus, the first reflective layer below the color conversion layer appears as multiple continuous curved surfaces on the plane of the transparent substrate, creating a multi-curved reflection pattern, thereby achieving more uniform display brightness.

[0152] Next, the first reflection structure will be described.

[0153] In one example, as shown in FIG6 and FIG8a, the first reflective structure 200 includes a light uniforming structure on a side of the transparent substrate close to the light emitting element, and the light uniforming structure has a second opening 2011;

[0154] In which, the first reflective structure 200 can also include a columnar structure 202, and the columnar structure 202 can be formed at the second opening 2011, and a first opening 2021 is formed in the columnar structure. Structurally, the columnar structure can be formed on the side of the light homogenizing structure away from the transparent substrate and overlap with the light homogenizing structure, that is, part of it is located on the light homogenizing structure and part of it is located in the second opening; or, the orthographic projection of the columnar structure on the transparent substrate can have no overlap with the orthographic projection of the light homogenizing structure on the transparent substrate, and the whole is formed in the second opening. In this case, the columnar structure can be connected to the light homogenizing structure to form a continuous reflective structure.

[0155] The thickness of the columnar structure can be greater than the thickness of the light-dodging layer. Specifically, the distance between the side of the columnar structure closest to the light-emitting element and the transparent substrate can be greater than the distance between the side of the columnar structure closest to the light-emitting element and the transparent substrate, so that the color conversion layer formed within the columnar structure can be closer to the light-emitting element. Specifically, the height of the columnar structure can be greater than or equal to 20 μm.

[0156] In which, the orthographic projection of the columnar structure on the transparent substrate can be a circular ring, and the internal area of ​​the circular ring is the area where the first opening is located. The color conversion layer can completely fill the first opening, that is, the first opening is filled with the color conversion layer. Therefore, the thickness of the color conversion layer can be less than or equal to 20μm. Preferably, the thickness of the color conversion layer can be 20μm.

[0157] The orthographic projection of the columnar structure on the transparent substrate is a circular ring. In one case, the width of the circular ring in the radial direction may be 10 μm, as indicated by the horizontal arrow in the columnar structure 202 in FIG. 8 a .

[0158] The columnar structure can be used to reflect light after color conversion by the color conversion layer toward the first reflective structure. Specifically, the orthographic projection of the second reflective structure on the transparent substrate can overlap or not overlap with the orthographic projection of the columnar structure on the transparent substrate. Figure 5 shows a non-overlapping situation, while Figure 6 shows an overlapping situation.

[0159] In conjunction with the above-mentioned example of the second reflective structure, the second reflective structure includes a first reflective layer, and the orthographic projection of the first reflective layer on the transparent substrate can overlap with the orthographic projection of the first reflective structure on the transparent substrate. This overlap can mean that the orthographic projection of the first reflective layer on the transparent substrate overlaps with the orthographic projection of the columnar structure on the transparent substrate. Thus, the columnar structure can also be used to reflect light reflected by the first reflective layer toward the transparent substrate. Furthermore, this overlap can also be used to cause light to be reflected multiple times in the first reflective layer and the transparent layer before being reflected into the uniform light layer.

[0160] In some examples, as shown in FIG8 a , the light-dodging structure may include a light-dodging layer 201 formed on a side of the transparent substrate near the light-emitting element, a second opening 2011 formed in the light-dodging layer 201, and a columnar structure connected to the light-dodging layer and located within the second opening. The columnar structure is thicker than the light-dodging layer.

[0161] The light-dodging layer is used to uniformly reflect light reflected and refracted by the second reflective structure toward the transparent substrate along the plane of the transparent substrate. In other words, the light-dodging layer is a waveguide light-dodging structure. The orthographic projection of the second opening of the light-dodging layer on the transparent substrate covers the orthographic projection of the first opening on the transparent substrate and covers the orthographic projection of the columnar structure on the transparent substrate.

[0162] The process for preparing the light-dodging layer can be as follows: first, microstructure grooves are formed on the surface of a transparent substrate, such as by etching multiple microgrooves using glass etching techniques; then, Ag, Al, and their laminated metals are prepared on the surface of the transparent substrate. After deposition, the Ag, Al, and their laminated metals cover the surface of the microgrooves, thereby forming a light-dodging layer 201 with circular microstructures 2012 and reflective properties. Specifically, the radius of the microgrooves can be 3 μm, and the depth can be 4 μm.

[0163] Among them, the orthographic projection of the light-dodging layer on the transparent substrate may not overlap with the orthographic projection of the first reflective layer on the transparent substrate. Therefore, the first reflective structure in the above example can be called a structure without eaves, that is, there is no eaves supporting the columnar structure between the light-dodging layer and the columnar structure. Using the first reflective structure of this example, its columnar structure can be made of a material with high reflectivity, such as a material with a reflectivity greater than 75%.

[0164] By adopting the first reflective structure of this example, the color conversion layer can be located as a whole on the transparent substrate through the first opening opened in the columnar structure. The columnar structure is made of high-reflectivity material, which can effectively reflect the light reflected back by the second reflective structure, thereby improving the brightness uniformity of the light-emitting panel.

[0165] In a further example of this embodiment, the distance between the dodging layer and the edge of the transparent layer can be 0 to 5 μm. As shown in 8b, there is a certain distance between the dodging layer 201 and the transparent layer. Since the second reflective structure is disposed within the groove of the transparent substrate, the 0 to 5 μm distance range can refer to the distance between the dodging layer and the edge of the groove. When using this distance range, it is possible to avoid the dodging layer being too far from the transparent layer and affecting the waveguide homogenization of light. Within this 0 to 5 μm range, a good waveguide homogenization effect can be achieved.

[0166] In another example, the first reflective structure may also include an eaves structure. The eaves structure may be understood as a reflective structure layer extending into the second reflective structure in addition to the columnar structure. The reflective structure layer may be used to support the columnar structure on the one hand, and to re-reflect the light reflected back from the second reflective structure on the other hand. Referring to FIG9 , FIG9 shows a schematic cross-sectional structure diagram of a light-emitting panel having an eaves structure. As shown in FIG9 , in addition to the light-evening layer 201, the light-evening structure may also include a second reflective layer 203. The second reflective layer may be located on the side of the light-evening layer facing away from the transparent substrate, wherein the orthographic projection of the second reflective layer on the transparent substrate overlaps with the orthographic projection of the light-evening layer and the second opening on the transparent substrate.

[0167] The second reflective layer 203 is provided with a third opening 2033 , and the orthographic projection of the third opening 2033 on the transparent substrate is located within the orthographic projection of the second opening 2011 on the transparent substrate;

[0168] Part or all of the columnar structure is located on a side of the second reflective layer facing away from the transparent substrate.

[0169] As shown in FIG9 , the second reflective layer can be an eave structure located on the second reflective structure. The reflectivity of the second reflective layer can be less than or equal to the reflectivity of the columnar structure. The columnar structure can be located entirely on the side of the second reflective layer facing away from the transparent substrate. In other words, the orthographic projection of the columnar structure on the transparent substrate can be completely covered by the orthographic projection of the second reflective layer on the transparent substrate. In this case, as shown in FIG9 , the orthographic projection of the third opening 2033 on the transparent substrate can overlap with the orthographic projection of the first opening on the transparent substrate. Alternatively, as shown in FIG10 , the orthographic projection of the third opening 2033 on the transparent substrate can cover the orthographic projection of the first opening on the transparent substrate. Alternatively, in another example, the orthographic projection of the third opening 2033 on the transparent substrate can be covered by the orthographic projection of the first opening on the transparent substrate, as shown in FIG14 .

[0170] Of course, a portion of the columnar structure may be located on the side of the second reflective layer facing away from the transparent substrate, and another portion may be located within the third opening defined by the second reflective layer. In this case, referring to FIG10 , which illustrates a cross-sectional view of another light-emitting panel having an eaves structure, the orthographic projection of the columnar structure on the transparent substrate may overlap with the orthographic projection of the second reflective layer on the transparent substrate, as well as with the orthographic projection of the third opening on the transparent substrate. In this case, the orthographic projection of the third opening on the transparent substrate may cover the orthographic projection of the first opening on the projection substrate.

[0171] Of course, regardless of whether there is an eaves structure, and regardless of the positional relationship between the columnar structure and the second reflective layer serving as the eaves structure, the second reflective structure can overlap with the columnar structure. Specifically, as shown in Figure 10 , the first reflective layer and the second reflective layer have an overlapping area. Because the columnar structure is located above the second reflective layer, the first reflective layer in the second reflective structure overlaps with the columnar structure. Alternatively, if a portion of the columnar structure is located above the second reflective layer and another portion is located within the third opening, the first reflective layer in the second reflective structure overlaps with the columnar structure but does not overlap with the second reflective layer.

[0172] In a further example, as shown in FIG10 , a portion of the columnar structure may be located on the side of the second reflective layer facing away from the transparent substrate, and another portion may be located within the third opening opened by the second reflective layer; in this case, the orthographic projection of the second reflective structure on the transparent substrate may also overlap with the orthographic projection of the second reflective layer on the transparent substrate. In conjunction with the above-mentioned example of the second reflective structure, the second reflective structure may include a first reflective layer, and the first reflective layer may overlap with the second reflective layer, as well as with the columnar structure. It should be noted that the orthographic projection of the transparent layer on the transparent substrate may overlap with the orthographic projection of the second reflective layer on the transparent substrate, and may not overlap with the orthographic projection of the light-uniforming layer on the transparent substrate.

[0173] With this exemplary structural design, the light reflected by the second reflective structure back to the first reflective structure can be reflected to the columnar structure and the second reflective layer, thereby improving the structural stability of the columnar structure.

[0174] The reflectivity of the columnar structure and the second reflective layer may differ, thereby improving the reflection efficiency of light directly leaking to the transparent substrate and improving uniformity. In a further example, the reflectivity of the columnar structure may be equal to or higher than the reflectivity of the second reflective layer.

[0175] Specifically, as described above, when the eaves structure is not included, the columnar structure can be made of a material with high reflectivity, and when the eaves structure is included, the second reflective layer can be made of a highly reflective material to improve the reflection efficiency of light directly leaking to the transparent substrate and improve the uniformity; or, when the eaves structure is included, both the second reflective layer and the columnar structure can be made of a highly reflective material to further improve the reflection efficiency of light directly leaking to the transparent substrate and improve the uniformity.

[0176] Specifically, when there is an overlap between the second reflective structure and the columnar structure but no overlap with the eaves structure, the reflectivity of the columnar structure can be higher than the reflectivity of the second reflective layer, so that the overlapping area with the second reflective structure serves as a direct receiving area for the reflected light, that is, it is mainly reflected by the columnar structure, which is made of high-reflective material to improve the reflectivity, thereby improving the uniformity of luminescence.

[0177] Specifically, when the second reflective structure overlaps with both the columnar structure and the eaves structure, the reflectivity of the columnar structure may be equal to the reflectivity of the second reflective layer.

[0178] It should be noted that the higher the reflectivity of the eaves material (second reflective layer), the higher the final backlighting efficiency. The reflectivity of the columnar structure and the dodging layer can be the same or different, and the reflectivity of the second reflective layer and the dodging layer can also be the same or different.

[0179] In one example, the second reflective layer can be a single-layer structure, which can be formed of the same material as the first reflective layer, or can be formed of the same material as the light-uniform layer. During the formation of the first reflective structure, the reflectivity of the second reflective layer can be optimized to improve the brightness uniformity of the light-emitting panel.

[0180] In another example, the second reflective layer may be a stacked structure, which may, on the one hand, support the columnar structure and, on the other hand, reflect the light reflected back by the second reflective structure. The second reflective layer may include a first reflective sublayer, which is located on the side of the light-uniform layer facing away from the transparent substrate; and a second reflective sublayer, which is located on the side of the first reflective sublayer facing away from the transparent substrate. The stiffness of the first reflective sublayer is greater than that of the second reflective sublayer.

[0181] The material of the first reflective sublayer may be molybdenum, and the material of the second reflective sublayer may be the same as or different from the material of the first reflective layer in the second reflective structure.

[0182] The orthographic projection of the first reflective sublayer on the transparent substrate may overlap with the orthographic projection of the second reflective sublayer on the transparent substrate.

[0183] With the illustrated light-emitting panel, the second reflective layer may be a mask structure formed in forming the second reflective structure. Thus, retaining the mask structure as the second reflective layer can simplify the process flow, thereby improving the manufacturing efficiency.

[0184] In some embodiments, the shape of the first opening is also related to the light extraction efficiency of the light-emitting panel, wherein the aperture of the first opening gradually decreases in the vertical direction from the transparent substrate to the light-emitting element. Specifically, the orthographic projection of the first opening on the plane in the thickness direction of the transparent substrate can be a trapezoid, and the trapezoid can be an upright trapezoid, and the shape of the orthographic projection of the first opening in the plane direction of the transparent substrate can be a circle. As a result, the first opening is an upright trapezoid in the normal direction from the transparent substrate to the light-emitting element, that is, the size of the first opening becomes larger and larger from the light-emitting element to the transparent substrate. As a result, after the color conversion layer converts the color of the light, it can make all the light after color conversion be incident on the second reflective structure as much as possible, thereby avoiding the loss of light and improving the light extraction efficiency.

[0185] Referring to Figures 11 and 12, Figure 11 shows a schematic diagram of the change of the first opening of the light-emitting panel shown in Figure 10, and Figure 12 shows a schematic diagram of the change of the light-emitting efficiency of the light-emitting panel when the first opening is an inverted trapezoid and an upright trapezoid, wherein the first opening is an inverted trapezoid, and the width of the side close to the light-emitting element is greater than the width of the side close to the transparent substrate. As shown in Figure 11, the first opening is an upright trapezoid, and the width of the side close to the light-emitting element is less than the width of the side close to the transparent substrate. In other words, the width of the color conversion layer close to the light-emitting element is less than the width of the side close to the transparent substrate. As shown in Figure 12, when the first opening is an upright trapezoid, the light extraction efficiency can be maintained at about 70%, and when the first opening is an inverted trapezoid, the light efficiency can be maintained at 50%-60%.

[0186] The following four specific examples illustrate the light-emitting panel of the present disclosure. Referring to FIG13 , a schematic cross-sectional structure diagram of a light-emitting panel A in one example is shown. As shown in FIG13 , the light-emitting panel A comprises: a transparent substrate 100, a light-emitting element 401 disposed on the transparent substrate 100, and a first reflective structure and a second reflective structure disposed between the light-emitting element and the transparent substrate. The first reflective structure is disposed near the light-emitting element and has a first opening filled with a color conversion layer 500. The second reflective structure is located on the side of the first reflective structure facing away from the light-emitting element. Specifically,

[0187] A double-bowl-shaped groove (i.e., a double-reflective bowl) is formed in the double-bowl-shaped groove. The second reflective structure includes: a first reflective layer 302 located at the bottom of the double-bowl-shaped groove; and a transparent layer 301 filling the double-bowl-shaped groove. The orthographic projections of the transparent layer and the first reflective layer on the transparent substrate are both circular surfaces. The orthographic projection of the transparent layer on the target plane is two continuous circular segments. The orthographic projection of the first reflective layer on the target plane overlaps with both of the circular segments. The target plane is a plane parallel to the thickness direction of the transparent substrate. The first reflective layer has a pointed cone, and the orthographic projection of the pointed cone on the target plane is located at the connection between the two circular segments.

[0188] In which, the first reflective structure includes: a light-leveling layer 201 arranged on the side of the transparent substrate close to the light-emitting element, and a columnar structure 202 arranged on the transparent layer and connected to the light-leveling layer, the light-leveling layer having a second opening, the second opening can expose the double-bowl-shaped groove, and a first opening is opened on the columnar structure, and the orthographic projection of the second opening on the transparent substrate covers the orthographic projection of the first opening on the transparent substrate; wherein, the columnar structure is an inverted trapezoid, so that the first opening is an upright trapezoid; the orthographic projection of the columnar structure on the transparent substrate is connected to the orthographic projection of the light-leveling layer on the transparent substrate, and overlaps with the orthographic projection of the transparent layer on the transparent substrate; the width of the columnar structure on the side of the first opening close to the transparent substrate is 10μm.

[0189] Specifically, the orthographic projection of the second opening on the transparent substrate may also be a circle. In one example, the orthographic projections of the first opening and the second opening on the transparent substrate may share a common center, or may not share a common center.

[0190] The first opening is filled with a color conversion layer configured to convert the color of light reflected by the light-emitting element. The thickness of the color conversion layer can be 20 μm, and the orthographic projection of the transparent layer on the transparent substrate fully covers the orthographic projection of the first opening on the transparent substrate.

[0191] The orthographic projection of the first reflective layer on the transparent substrate fully covers the orthographic projection of the color conversion layer on the transparent substrate, and has an overlapping area with the orthographic projection of the columnar structure on the transparent substrate; specifically, the orthographic projection of the first reflective layer on the transparent substrate is fully covered by the orthographic projection of the transparent layer on the transparent substrate.

[0192] The overlapping area w1 between the orthographic projection of the first reflective layer on the transparent substrate and the orthographic projection of the columnar structure on the transparent substrate satisfies the above-mentioned preset relationship, that is, satisfies formula (1);

[0193] The minimum distance hm from the first reflective layer to the side of the transparent substrate facing away from the light-emitting element is 0.5 to 0.85 times the distance hg from the color conversion layer to the transparent substrate.

[0194] The distance hj between the tip of the first reflective layer and the side of the transparent substrate facing away from the light-emitting element is 0.8 to 1 times the maximum vertical distance (hg-hm) from the arc-shaped reflective layer to the color conversion layer.

[0195] The columnar structure can be made of a highly reflective material with a reflectivity greater than 75%. The light-homogenizing layer is a dot light-homogenizing structure with a micro-groove radius of 3 μm and a depth of 3 μm.

[0196] The light emitted by the light-emitting element enters the color conversion layer, undergoes color conversion in the color conversion layer, and the color-converted light is all incident on the transparent layer by the columnar structure. Part of the light incident on the transparent layer is refracted by the edge of the transparent layer to the light-uniform layer, and is waveguided and uniformed by the light-uniform layer to the light-emitting surface of the transparent substrate. When the other part of the light incident on the transparent layer directly leaks toward the transparent substrate, it is reflected back to the columnar structure by the first reflective layer at the bottom. Part of the light reflected back to the columnar structure is reflected to the light-emitting surface of the transparent substrate, while the other light, after multiple reflections by the columnar structure and the first reflective layer, can be refracted by the edge of the transparent layer to the light-uniform layer, and is waveguided and uniformed by the light-uniform layer to the light-emitting surface of the transparent substrate. In this way, the light spot problem caused by the high energy of the light directly leaking from the color conversion layer (directly below the first reflective layer) can be avoided, thereby improving the brightness uniformity of the light-emitting panel.

[0197] In addition to the first and second reflective structures, the light-emitting panel may further include a copper lead post 600 located on the side of the light-dotting layer facing away from the transparent substrate, with no overlap between the copper lead post and the columnar structure; and an electrode 700 located on the side of the copper lead post facing away from the transparent substrate, the electrode being used to provide a driving electrical signal to the light-emitting element; and a transparent adhesive layer 800 is provided on the side of the color conversion layer facing away from the transparent substrate, the transparent adhesive layer filling the area enclosed by the copper lead post and the electrode.

[0198] Among them, a light-emitting layer 400 is arranged on the side of the electrode away from the transparent substrate, and a light-emitting element 401 is arranged in the light-emitting layer 400. The periphery of the light-emitting layer is encapsulated by a protective layer 900, and the protective layer is coated with white oil. The white oil coating area can penetrate into the side of the light-evening layer away from the transparent substrate to protect the light-emitting element, copper lead column, electrode and light-evening layer, so that the light-evening layer, light-emitting element, copper lead column, electrode, etc. are not corroded by external water vapor.

[0199] In which, an encapsulation layer 501 is formed on the side of the color conversion layer 500 facing away from the transparent substrate. The encapsulation layer is used to protect the color conversion layer. The encapsulation layer can be made of a transparent material. The orthographic projection of the encapsulation layer on the transparent substrate can cover the orthographic projection of the color conversion layer on the transparent substrate, and the edge can overlap with the edge of the columnar structure on the side close to the light-emitting element.

[0200] As shown in FIG13 , the height of the columnar structure may be greater than the height of the copper lead post, but less than the sum of the heights of the copper lead post and the electrode.

[0201] FIG14 shows a cross-sectional view of a light-emitting panel B in an example. The panel comprises a transparent substrate 100, a light-emitting element 401 disposed on the transparent substrate, and a first reflective structure and a second reflective structure disposed between the light-emitting element and the transparent substrate. The first reflective structure is disposed near the light-emitting element and has a first opening 2021 filled with a color conversion layer 500. The second reflective structure is located on a side of the first reflective structure facing away from the light-emitting element. Specifically, the arrangement of the first reflective structure differs from that of the backplane A in that:

[0202] The first reflective structure includes the following configuration:

[0203] A light-dodging layer 201 is provided on a side of the transparent substrate close to the light-emitting element. The light-dodging layer has a second opening 2011. The second opening 2011 can expose a double-bowl-shaped groove.

[0204] A second reflective layer 203 is provided on the light-dodging layer. The second reflective layer mainly includes a first reflective sublayer 2031 formed on the light-dodging layer, and a second reflective sublayer 2032 formed on the side of the first reflective sublayer away from the light-dodging layer. The first reflective sublayer is made of molybdenum, and the second reflective sublayer is made of the same material as the first reflective layer. The second reflective layer is formed when the second reflective structure is formed.

[0205] A columnar structure 202 is provided on a side of the second reflective layer facing away from the transparent substrate, wherein the light-dotting layer is provided with a second opening 2011, the second reflective layer has a third opening 2033, and a first opening 2021 is provided on the columnar structure; the orthographic projection of the second opening 2011 on the transparent substrate covers the orthographic projection of the third opening 2033 on the transparent substrate, and the orthographic projection of the first opening 2021 on the transparent substrate; the orthographic projection of the third opening 2033 on the transparent substrate is covered by the orthographic projection of the first opening 2021 on the transparent substrate; wherein the columnar structure is an upright trapezoid, and the first opening is an inverted trapezoid;

[0206] The orthographic projection of the columnar structure on the transparent substrate may overlap with the orthographic projection of the third opening 2033 on the transparent substrate, and with the orthographic projection of the second reflective layer on the transparent substrate. The orthographic projection of the transparent layer on the transparent substrate completely covers the orthographic projection of the first opening 2021 on the transparent substrate, and covers the orthographic projection of the columnar structure and the second reflective layer on the transparent substrate.

[0207] The orthographic projection of the first reflective layer on the transparent substrate completely covers the orthographic projection of the color conversion layer on the transparent substrate, and overlaps with the orthographic projections of the columnar structure and the second reflective layer on the transparent substrate, and the overlap of the two constitutes an overlapping area.

[0208] Among them, the reflectivity of the columnar structure is higher than that of the second reflective layer. The columnar structure can be made of high-reflective material, and its reflectivity can be greater than 75%. The light-homogenizing layer is a dot light-homogenizing structure, and the first reflective layer is a curved surface concave toward the light-emitting element.

[0209] The light emitted by the light-emitting element enters the color conversion layer, undergoes color conversion in the color conversion layer, and the color-converted light is all incident on the transparent layer by the columnar structure. Part of the light incident on the transparent layer is refracted by the edge of the transparent layer to the light-leveling layer, and then waveguided and homogenized by the light-leveling layer to the light-emitting surface of the transparent substrate. When the other part of the light incident on the transparent layer directly leaks toward the transparent substrate, it is reflected back to the columnar structure and the second reflective layer by the first reflective layer at the bottom. Part of the light reflected back to the columnar structure and the second reflective layer is reflected to the light-emitting surface of the transparent substrate, while the other light, after multiple reflections with the first reflective layer, can be refracted by the edge of the transparent layer to the light-leveling layer, and then waveguided and homogenized by the light-leveling layer to the light-emitting surface of the transparent substrate. In this way, the light spot problem caused by the high energy of light directly leaking out from directly below the color conversion layer (directly below the first reflective layer) can be avoided, thereby improving the brightness uniformity of the light-emitting panel.

[0210] Referring to FIG15 , a schematic cross-sectional view of a light-emitting panel C in an example is shown. As shown in FIG15 , the panel specifically includes: a transparent substrate 100; a light-emitting element 401 disposed on the transparent substrate; and a first reflective structure and a second reflective structure located between the light-emitting element and the transparent substrate. The first reflective structure is disposed proximate to the light-emitting element and has a first opening, with a color conversion layer 500 filled within the first opening 2021. The second reflective structure is located on the side of the first reflective structure facing away from the light-emitting element. Specifically, unlike light-emitting panel B, the columnar structures 202 of light-emitting panel C are all located on the side of the second reflective layer 203 facing away from the transparent substrate. The columnar structures are in the form of an upright trapezoid, resulting in the first opening being in the form of an inverted trapezoid.

[0211] The orthographic projection of the third opening 2033 of the second reflective layer 203 on the transparent substrate can be covered by the orthographic projection of the first opening 2021 on the transparent substrate, so that the light after color conversion by the color conversion layer can be incident on the transparent layer of the second reflective structure as much as possible.

[0212] Referring to FIG16 , a schematic cross-sectional view of a light-emitting panel D in an example is shown. As shown in FIG16 , the panel specifically includes: a transparent substrate, a light-emitting element disposed on the transparent substrate, and a first reflective structure and a second reflective structure located between the light-emitting element and the transparent substrate. The first reflective structure is disposed proximate to the light-emitting element and has a first opening filled with a color conversion layer. The second reflective structure is located on the side of the first reflective structure facing away from the light-emitting element. Specifically, unlike light-emitting panel C, the second reflective layer 203 of light-emitting panel D is a single-layer structure, comprising only one layer of reflective material. It should be noted that the reflectivity of the second reflective layer is the same as that of the columnar structure, and both are made of high-reflectivity materials.

[0213] Based on the same inventive concept, an embodiment of the present disclosure further provides a method for manufacturing a light-emitting panel, which may specifically include the following manufacturing steps:

[0214] Providing a transparent substrate, forming a first reflective structure and a second reflective structure on the transparent substrate; wherein the first reflective structure has a first opening;

[0215] filling the first opening with a color conversion material to form a color conversion layer;

[0216] A light-emitting element is formed on a side of the color conversion layer facing away from the transparent substrate.

[0217] The transparent substrate may be a glass substrate. When forming the first reflective structure and the second reflective structure on the transparent substrate, the first reflective structure may be formed first, and then the second reflective structure. Alternatively, a portion of the first reflective structure, such as a light-dotting layer, may be formed first, followed by the second reflective structure, and then the remaining portion of the first reflective structure, such as a columnar structure, may be formed.

[0218] In one example, since the first reflective structure may include a light-dotting layer and a columnar structure, or may include a light-dotting layer, a second reflective layer, and a columnar structure, the following process may be used to form the first reflective structure and the second reflective structure:

[0219] First, a light-dotting layer having a second opening is formed on a transparent substrate;

[0220] Next, a mask layer is patterned on a side of the light-dodging layer facing away from the transparent substrate, and etching is performed based on the mask layer to form an arc-shaped groove, wherein the arc-shaped groove is exposed by the second opening;

[0221] Afterwards, using the mask layer as a mask, reflective material deposition and transparent material filling are sequentially performed to form a first reflective structure;

[0222] Next, a columnar structure having a first opening is formed on a side of the transparent layer away from the transparent substrate to obtain a first reflective structure.

[0223] Among them, no matter the first reflective structure includes a light-dotting layer and a columnar structure, or includes a light-dotting layer, a second reflective layer and a columnar structure, the columnar structure is formed on the transparent layer, that is, the columnar structure needs to be formed after the light-dotting layer and the second reflective structure are prepared.

[0224] According to the film layer structure included in the first reflective structure, the columnar structure can be formed by any of the following methods:

[0225] Method 1: After washing away the mask layer and the reflective material deposited on the mask layer, a columnar structure having a first opening is formed on a side of the first reflective structure facing away from the transparent substrate.

[0226] Method 2: forming a columnar structure having a first opening on the reflective material located on the mask layer.

[0227] Method 3: The mask layer and the reflective material deposited on the mask layer are washed away, and a second reflective layer having a third opening is formed on the side of the light-dominating layer facing away from the transparent substrate, and a columnar structure is formed on the side of the second reflective layer facing away from the transparent substrate; wherein all or part of the columnar structure is stacked on the second reflective layer, and the orthographic projection of the third opening on the transparent substrate is located within the orthographic projection of the second opening on the transparent substrate.

[0228] Among them, in method 1, after washing away the mask layer and the reflective material deposited on the mask layer, when a columnar structure with a first opening is formed on the side of the first reflective structure away from the transparent substrate, a first reflective structure without an eaves structure can be formed.

[0229] Among them, in method 2, when a columnar structure having a first opening is formed on the reflective material located on the mask layer, a first reflective structure having an eaves structure can be constituted. Specifically, the eaves structure can be a second reflective layer. Since the columnar structure is formed directly on the reflective material on the mask layer, its eaves structure can include a first reflective sublayer and a second reflective sublayer located on the side of the first reflective sublayer away from the transparent substrate. The first reflective sublayer is the mask layer, which is made of molybdenum material. The material of the second reflective sublayer is the same as that of the first reflective layer, and it can be realized in the same process as the first reflective layer. In the first reflective structure prepared under this process, the reflectivity of the columnar structure is higher than the reflectivity of the second reflective layer.

[0230] Among them, in method 3, after washing away the mask layer and the reflective material deposited on the mask layer, a second reflective layer having a third opening can be re-formed on the side of the light-dodging layer away from the transparent substrate. The second reflective layer can overlap with the orthographic projection of the light-dodging layer on the transparent substrate, and overlap with the orthographic projection of the second opening of the light-dodging layer on the transparent substrate. Thus, the re-prepared second reflective layer can serve as an eaves structure; it can be a single-layer reflective layer, or it can be a multi-layer reflective layer. In this case,

[0231] The second reflective layer may be made of a high reflectivity material, so that the reflectivity of the second reflective layer may also be equal to the reflectivity of the columnar structure.

[0232] In mode 3, when a columnar structure is formed on the side of the second reflective layer facing away from the transparent substrate, all or part of the columnar structure is stacked on the second reflective layer. Specific structures can refer to the structures of light-emitting panels B and C.

[0233] Taking the preparation of the light-emitting panel A in the above example as an example, referring to FIG17 and FIG18 , FIG17 shows a schematic diagram of the preparation process, and FIG18a to FIG18d show schematic top views of the prepared light-emitting panel. The preparation process is as follows:

[0234] S1. Microgrooves are prepared on the surface of the glass substrate by etching the glass to form microgrooves, such as the microstructures shown in Figures 18a and 18d.

[0235] S2. Ag, Al and their laminated metals are prepared on the surface of the glass substrate. After deposition, the reflective metal will cover the surface of the micro-grooves to form a circular microstructure 2012 and a light-dispersing layer 201 having a reflective capability, as shown in the Ag boundary in FIG. 18d and FIG. 18b;

[0236] S3. Etching the glass is performed using a mask layer (made of Mo, also known as the first reflective sublayer) to form a double-bowl-shaped groove. During the formation, the glass mask boundary (the Mo inner ring in FIG18c ) is formed. FIG18c is a top plan view of the cross-sectional structure shown in step S3 in FIG17 . The mask layer can cover the dodging layer, which has a Mo inner ring, which is shown as 311 in S3 in FIG17 . When etching the glass, the Mo inner ring can fall off, thereby forming a double-bowl-shaped groove. After the glass mask is deposited, a laminated metal structure (including the dodging layer and the mask layer located on the dodging layer) is formed within the micro-groove.

[0237] S4. After the glass etching is completed, the dodging layer is located outside the boundary of the double-bowl-shaped groove (the distance between the dodging layer and the double-bowl-shaped groove is within 5 μm), the mask layer extends into the double-bowl-shaped groove to form an eaves structure, and a pointed cone structure is formed within the double-bowl-shaped groove. The coverage of each layer can be seen from the top view shown in Figure 8b;

[0238] S5. Deposit Ag, Al, and their stacked metals to form a first reflective layer and a second reflective sublayer on the mask layer. After the first reflective layer is formed, the second reflective sublayer and the mask layer have the same cross-sectional position on the glass, that is, a three-layer metal structure (Ag-Mo-Ag) is formed on the micro-groove and the glass plane. The eaves structure formed above the double-bowl-shaped groove is a double-layer metal structure, as shown in the Mo eaves boundary in Figure 18d. At the same time, the first reflective layer can be formed on the pointed cone inside the double-bowl-shaped groove.

[0239] S6. Coating with an organic transparent adhesive material, filling the organic transparent adhesive material into the inner portion of the double bowl-shaped groove to form a transparent layer with a flat surface;

[0240] S7. The mask layer and the second reflective sublayer are removed, leaving the underlying uniform light layer;

[0241] S8. Cu traces are made on the side of the light-distributing layer away from the transparent substrate, with a thickness of 2-7 μm to form a Cu electrode;

[0242] S9. The columnar structure is formed, where the columnar structure covers the edge of the double-bowl-shaped groove and extends into the interior of the double-bowl-shaped groove to an overlapping area with the first reflective layer. The columnar structure does not overlap with the Cu electrode.

[0243] S10. Fill the first opening with a color conversion material to form a color conversion layer, and complete the packaging of the light-emitting element and the color conversion layer on the side of the first reflective structure facing away from the transparent substrate.

[0244] S11. Punch the light-emitting components - apply lens glue - apply white oil. The lens glue is used to protect the area around the LED pads, and the white oil is applied to the entire surface to protect the light-emitting components, ultimately forming the structure shown in Figure 13.

[0245] Taking the preparation of the light-emitting panel B in the above example as an example, its manufacturing process is different from that of the light-emitting panel A in that there is no step S6 , and when the columnar structure is manufactured, the columnar structure is directly manufactured on the second reflective sublayer.

[0246] Among them, taking the preparation of the light-emitting panel D in the above example as an example, its production process is different from that of the light-emitting panel A: there is a step S6 process, and when the columnar structure is produced in step S8, it is necessary to re-produce the reflective layer Ag on the side of the light-uniform layer away from the transparent substrate, that is, the second reflective layer, and then prepare the columnar structure on the second reflective layer.

[0247] A display device is also provided, wherein the display device includes a display substrate and any of the above-mentioned light-emitting panels cooperating with the display substrate. The light-emitting panel can be used as a backlight panel of the display substrate, and the display substrate can be a mini-LED display substrate.

[0248] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0249] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, commodity, or device that includes the element.

[0250] The above is a detailed introduction to a display method, device, system and medium provided by the present disclosure. Specific examples are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core ideas of the present disclosure. At the same time, for those skilled in the art, according to the ideas of the present disclosure, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present disclosure.

[0251] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0252] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0253] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0254] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0255] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0256] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A light-emitting panel, wherein, include: A transparent substrate, a light emitting element disposed on the transparent substrate, and a first reflective structure and a second reflective structure located between the light emitting element and the transparent substrate; wherein, The first reflective structure is disposed close to the light emitting element and has a first opening, and a color conversion layer is filled in the first opening; The second reflective structure is located on a side of the first reflective structure away from the light-emitting element, and an orthographic projection of the second reflective structure on the transparent substrate overlaps with an orthographic projection of the color conversion layer on the transparent substrate.

2. The light-emitting panel according to claim 1, wherein, The orthographic projection of the second reflective structure on the transparent substrate completely covers the orthographic projection of the color conversion layer on the transparent substrate.

3. The light-emitting panel according to claim 1, wherein, The orthographic projection of the second reflective structure on the transparent substrate has an overlapping area with the orthographic projection of the first reflective structure on the transparent substrate.

4. The light-emitting panel according to claim 3, wherein, The target size of the overlapping region in the planar direction is less than or equal to 10 μm.

5. The light-emitting panel according to claim 1, wherein, A groove is formed on a side of the transparent substrate close to the light emitting element, and a transparent layer is arranged in the groove: wherein the second reflective structure comprises: A first reflective layer, located on a side of the transparent layer away from the light-emitting element, the first reflective layer being concave in an arc shape toward the light-emitting element; The orthographic projection of the transparent layer on the transparent substrate overlaps with the orthographic projection of the first reflective structure on the transparent substrate, and covers the orthographic projection of the first opening on the transparent substrate and the orthographic projection of the first reflective layer on the transparent substrate.

6. The light-emitting panel according to claim 5, wherein, The maximum vertical distance from the first reflective layer to the color conversion layer, the target size, the refractive index of the transparent substrate, and the refractive index of the medium on the light emitting surface side of the transparent substrate satisfy a preset relationship; The preset relationship is w1=hw×tan(asin(no / n1)); Wherein, w1 is the target size, hw is the maximum vertical distance, n1 is the refractive index of the transparent substrate, and no is the refractive index of the medium on the light emitting surface side of the transparent substrate.

7. The light-emitting panel according to claim 5, wherein, The minimum distance from the first reflective layer to the side of the transparent substrate away from the light-emitting element is 0.5 to 0.85 times the distance from the color conversion layer to the transparent substrate.

8. The light-emitting panel according to claim 5, wherein, The orthographic projections of the transparent layer and the first reflective layer on the transparent substrate are both circular surfaces, the orthographic projection of the transparent layer on the target plane is two intersecting circular segments, and the orthographic projection of the first reflective layer on the target plane overlaps with the two circular segments; wherein the target plane is a plane parallel to the thickness direction of the transparent substrate, the first reflective layer has a pointed cone, and the orthographic projection of the pointed cone on the target plane is located at the intersection of the two circular segments; The distance between the pointed cone and the side of the transparent substrate facing away from the light-emitting element is 0.8 to 1 times the maximum vertical distance from the first reflective layer to the color conversion layer.

9. The light-emitting panel according to any one of claims 1-8, wherein, The first reflective structure comprises: A light homogenizing structure, formed on a side of the transparent substrate close to the light emitting element, having a second opening; The columnar structure is provided with the first opening, wherein the orthographic projection of the second opening on the transparent substrate overlaps with the orthographic projection of the first opening on the transparent substrate.

10. The light-emitting panel according to claim 9, wherein, The light homogenization structure comprises: A light-dodging layer is formed on a side of the transparent substrate close to the light-emitting element, wherein the second opening is provided in the light-dodging layer; The orthographic projection of the columnar structure on the transparent substrate is located within the orthographic projection of the second opening on the transparent substrate.

11. The light-emitting panel according to claim 10, wherein, The light homogenization structure further includes: A second reflective layer is located on a side of the light-dodging layer away from the transparent substrate, and an orthographic projection of the second reflective layer on the transparent substrate overlaps with an orthographic projection of the light-dodging layer and the second opening on the transparent substrate; The second reflective layer is provided with a third opening, and the orthographic projection of the third opening on the transparent substrate is located within the orthographic projection of the second opening on the transparent substrate, and overlaps with the orthographic projection of the first opening on the transparent substrate; Part or all of the columnar structure is located on a side of the second reflective layer away from the transparent substrate.

12. The light-emitting panel according to claim 11, wherein, The orthographic projection of the second reflective layer on the transparent substrate overlaps with the orthographic projection of the columnar structure on the transparent substrate, and overlaps with the orthographic projection of the second reflective layer on the transparent substrate, and does not overlap with the orthographic projection of the light-homogenizing layer on the transparent substrate.

13. The light-emitting panel according to claim 11 or 12, wherein, The reflectivity of the columnar structure is equal to or higher than the reflectivity of the second reflective layer.

14. The light-emitting panel according to claim 9 or 10, wherein, The distance between the light homogenizing layer and the edge of the second reflective structure is 0-5 um.

15. The light-emitting panel according to claim 11, wherein, The second reflective layer comprises: A first reflective sublayer, located on a side of the light-homogenizing layer away from the transparent substrate; a second reflective sublayer, located on a side of the first reflective sublayer away from the transparent substrate; The second reflective sublayer is made of the same material as the first reflective layer in the second reflective structure.

16. The light-emitting panel according to any one of claims 1-8 or any one of claims 10-15, wherein, The first opening is a trapezoidal opening, and the diameter of the first opening gradually decreases in a vertical direction from the transparent substrate toward the light emitting element.

17. A method for manufacturing a light-emitting panel, wherein, For preparing the light-emitting panel according to any one of claims 1 to 16, the method comprises: Providing a transparent substrate, forming a first reflective structure and a second reflective structure on the transparent substrate; wherein the first reflective structure has a first opening; Filling the first opening with a color conversion material to form a color conversion layer; A light emitting element is formed on a side of the color conversion layer away from the transparent substrate.

18. The manufacturing method according to claim 17, wherein, The step of forming a first reflective structure and a second reflective structure on the transparent substrate comprises: forming a light homogenizing layer having a second opening on the transparent substrate; Patterning a mask layer on a side of the light-dodging layer away from the transparent substrate, and performing etching based on the mask layer to form an arc-shaped groove, wherein the arc-shaped groove is exposed by the second opening; Using the mask layer as a mask, sequentially depositing a reflective material and filling with a transparent material to form the second reflective structure; A columnar structure having the first opening is formed on a side of the transparent layer away from the transparent substrate to obtain the first reflective structure.

19. The manufacturing method according to claim 18, wherein, Form a columnar structure having the first opening on a side of the transparent layer facing away from the transparent substrate to obtain the first reflective structure, including any one of the following: After removing the mask layer and the reflective material deposited on the mask layer, form a columnar structure having the first opening on a side of the transparent layer facing away from the transparent substrate; Form a columnar structure having the first opening on the reflective material located on the mask layer; Remove the mask layer and the reflective material deposited on the mask layer, and form a second reflective layer having a third opening on a side of the light homogenizing layer facing away from the transparent substrate, and form the columnar structure on a side of the second reflective layer facing away from the transparent substrate; Wherein, all or part of the columnar structure is stacked on the second reflective layer.

20. A display device, wherein, The display device includes a display substrate and a light-emitting panel as described in any one of claims 1-15 in cooperation with the display substrate.

Images