阅读说明：本技术 一种显示面板及其制备方法 (Display panel and preparation method thereof ) 是由 陈寅伟 孙海威 于 2020-05-29 设计创作，主要内容包括：本发明涉及显示技术领域,尤其涉及一种显示面板及其制备方法。与相关技术中发光二极管的间距无法缩小相比,能够提高显示画面的细腻程度,从而能够提高显示的画面质量。一种显示面板,包括：衬底；设置于所述衬底上的多个发光二极管,任意相邻的两个发光二极管之间具有间距；设置于所述衬底上,且位于所述发光二极管远离所述衬底一侧的透镜层,所述透镜层被配置为使所述发光二极管通过所述透镜层成像,并使所成的像相对于所述发光二极管未成像前的单位面积的数量增大,间距减小。(The invention relates to the technical field of display, in particular to a display panel and a preparation method thereof. Compared with the prior art that the distance between the light emitting diodes cannot be reduced, the method can improve the fineness of the displayed picture, thereby improving the quality of the displayed picture. A display panel, comprising: a substrate; a plurality of light emitting diodes disposed on the substrate, a space being provided between any two adjacent light emitting diodes; the lens layer is arranged on the substrate and positioned on one side of the light emitting diode far away from the substrate, and the lens layer is configured to enable the light emitting diode to form images through the lens layer, and the number of the formed images is increased and the distance between the formed images is reduced relative to the unit area of the light emitting diode before the light emitting diode is not formed images.)

1. A display panel, comprising:

a substrate;

a plurality of light emitting diodes disposed on the substrate, a space being provided between any two adjacent light emitting diodes;

the lens layer is arranged on the substrate and positioned on one side of the light emitting diode far away from the substrate, and the lens layer is configured to enable the light emitting diode to form images through the lens layer, and the number of the formed images is increased and the distance between the formed images is reduced relative to the unit area of the light emitting diode before the light emitting diode is not formed images.

2. The display panel according to claim 1,

the lens layer comprises a transparent base and a plurality of lenses arranged on one side of the transparent base far away from the substrate, and the lenses are arranged in the same plane perpendicular to the thickness direction of the substrate and are arranged in an array form;

the following relationship exists between the lens and the light emitting diode:

in the plurality of lenses, the distance between the optical centers of any two adjacent lenses is greater than or equal to 0.7 times of the distance between two adjacent light-emitting diodes and less than or equal to 2 times of the distance between two adjacent light-emitting diodes; the vertical distance between each light emitting diode and the plane where the optical center of the lens is located is larger than or equal to 1.0 time of the distance between two adjacent light emitting diodes and smaller than or equal to 4 times of the distance between two adjacent light emitting diodes.

3. The display panel according to claim 2,

the material of the transparent substrate and the material of the lens are different.

4. The display panel according to claim 2 or 3,

the orthographic projection of the lens on the substrate is rectangular, triangular or polygonal in shape.

5. The display panel according to claim 2 or 3,

the surface of the lens remote from the substrate is provided with grooves and/or protrusions.

6. The display panel according to claim 1,

and a transparent material layer is also arranged between the lens layer and the light-emitting diode, the transparent material layer is in direct contact with the light-emitting diode, and the height of the surface of the transparent material layer, which is far away from the substrate, is higher than the height of the light-emitting surface of the light-emitting diode.

7. A method for manufacturing a display panel, comprising:

forming a plurality of light emitting diodes on a substrate, wherein a space is reserved between any two adjacent light emitting diodes;

and forming a lens layer on the substrate and on the side of the light-emitting diode far away from the substrate, wherein the lens layer is configured to enable the light-emitting diode to form an image through the lens layer, and the number of the formed images is increased and the distance is reduced relative to the unit area of the light-emitting diode before the light-emitting diode is not formed.

8. The production method according to claim 7,

in the case that the lens layer includes a transparent base and a lens disposed on a side of the transparent base away from the substrate;

forming a lens layer on the substrate and on the side of the light emitting diode far away from the substrate, including:

forming a transparent film on a transparent substrate;

imprinting a transparent thin film through a mold imprinting process to form the lens on the transparent substrate;

and adhering the transparent substrate with the lens on the substrate to form the lens layer.

9. The method according to claim 8,

in the case where the surface of the lens remote from the substrate is provided with grooves and/or protrusions;

before the transparent film is imprinted by the mold imprinting process, the method further includes:

forming a groove on the surface of the mold core of the mold through a carving process.

10. The production method according to any one of claims 7 to 9,

in the case where a transparent material layer is further provided between the lens layer and the light emitting diode;

before forming the lens layer on the substrate, the manufacturing method further includes:

and forming the transparent material layer on the substrate, enabling the transparent material layer to be in direct contact with the light-emitting diode, and enabling the height of the surface, far away from the substrate, of the transparent material layer to be higher than the height of the light-emitting surface of the light-emitting diode.

Technical Field

The invention relates to the technical field of display, in particular to a display panel and a preparation method thereof.

Background

The Mini LED (Mini Light Emitting Diode) refers to an LED chip with a size of 100 micrometers, and the size of the Mini LED chip is between a small-pitch LED and a Micro LED (Micro Light Emitting Diode), and the Mini LED is a result of the size of the small-pitch LED being continuously reduced.

Disclosure of Invention

The embodiment of the invention provides a display panel and a preparation method thereof, which are used for solving the problems that in the related art, the thickness of a flexible substrate is thicker, an MCL glue layer on the flexible substrate needs to be thicker to adjust the position of a neutral layer, so that the integral thickness of a bending area is thicker, and the stress borne by an inorganic material layer and a metal material layer is still larger.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in one aspect, an embodiment of the present invention provides a display panel, including: the LED comprises a substrate and a plurality of LEDs arranged on the substrate, wherein a space is reserved between any two adjacent LEDs; and the lens layer is arranged on the substrate and positioned on one side of the light-emitting diode far away from the substrate, and the lens layer is configured to enable the light-emitting diode to form images through the lens layer, and the number of the formed images is increased and the distance is reduced relative to the unit area of the light-emitting diode before the images are not formed.

Optionally, the lens layer includes a transparent base and a plurality of lenses disposed on a side of the transparent base away from the substrate, and the plurality of lenses are disposed in a same plane perpendicular to the thickness direction of the substrate and arranged in an array.

The following relationship exists between the lens and the light emitting diode:

in the plurality of lenses, the distance between the optical centers of any two adjacent lenses is greater than or equal to 0.7 times of the distance between two adjacent light-emitting diodes and less than or equal to 2 times of the distance between the two adjacent light-emitting diodes; the vertical distance between each light emitting diode and the plane where the optical center of the lens is located is larger than or equal to 1.0 time of the distance between two adjacent light emitting diodes and smaller than or equal to 4 times of the distance between two adjacent light emitting diodes.

Optionally, the material of the transparent substrate and the material of the lens are different.

Optionally, the orthographic projection of the lens on the substrate is rectangular, triangular or polygonal in shape.

Optionally, the surface of the lens remote from the substrate is provided with grooves and/or protrusions.

Optionally, a transparent material layer is further disposed between the lens layer and the light emitting diode, the transparent material layer is in direct contact with the light emitting diode, and the height of the surface of the transparent material layer away from the substrate is higher than the height of the light emitting surface of the light emitting diode.

In another aspect, an embodiment of the present invention provides a method for manufacturing a display panel, including: forming a plurality of light emitting diodes on a substrate, wherein a space is reserved between any two adjacent light emitting diodes; and forming a lens layer on the substrate and on the side of the light-emitting diode far away from the substrate, wherein the lens layer is configured to enable the light-emitting diode to form an image through the lens layer, and the number of the formed images is increased and the distance is reduced relative to the unit area of the light-emitting diode before the light-emitting diode is not formed.

Optionally, in the case that the lens layer includes a transparent base and a lens disposed on a side of the transparent base away from the substrate; forming a lens layer on the substrate and on the side of the light emitting diode far away from the substrate, including: forming a transparent film on a transparent substrate; imprinting a transparent thin film through a mold imprinting process to form the lens on the transparent substrate; and adhering the transparent substrate with the lens on the substrate to form the lens layer.

Optionally, in the case that the surface of the lens away from the substrate is provided with grooves and/or protrusions; before the transparent film is imprinted by the mold imprinting process, the method further includes: forming a groove on the surface of the mold core of the mold through a carving process.

Optionally, a transparent material layer is further disposed between the lens layer and the light emitting diode; before forming the lens layer on the substrate, the manufacturing method further includes: and forming the transparent material layer on the substrate, enabling the transparent material layer to be in direct contact with the light-emitting diode, and enabling the height of the surface, far away from the substrate, of the transparent material layer to be higher than the height of the light-emitting surface of the light-emitting diode.

The embodiment of the invention provides a display panel and a preparation method thereof, wherein a lens layer is arranged on a substrate and positioned at one side of a light emitting diode far away from the substrate, according to the imaging rule of the lens (such as a convex lens and a concave lens), the curvature radius and the focal length of each layer of lens in the lens layer, the vertical distance (object distance) between the plane where the optical center of the lens is positioned and the light emitting diode and the corresponding relation between the lens and the light emitting diode (namely, one lens images a plurality of light emitting diodes) are reasonably arranged, so that the distances between the light emitting diode and two adjacent light emitting diodes are reduced images, the number of the formed images relative to the unit area of the light emitting diodes before imaging is increased, the distances are reduced, compared with the situation that the distances between the light emitting diodes in the related technology cannot be reduced, the fineness of a display picture can be improved, thereby improving the quality of the displayed picture.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structural diagram of a display panel according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating an imaging rule of a convex lens according to an embodiment of the present invention;

FIG. 4a is a schematic diagram of a simulation of the number per unit area of LEDs before imaging by using optical simulation software according to an embodiment of the present invention;

FIG. 4b is a simulation diagram of the number of unit areas of an image of a light emitting diode by optical simulation software according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a lens array arrangement according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a lens according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a surface of a lens away from a substrate, where the surface is provided with grooves and/or protrusions according to an embodiment of the present invention;

fig. 8 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the invention;

fig. 9 is a schematic structural diagram of forming a plurality of light emitting diodes on a substrate according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a structure for forming a transparent film on a transparent substrate according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a transparent substrate with a plurality of lenses formed thereon by imprinting a transparent film with a roller mold according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of forming a transparent material layer on a light emitting diode according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An embodiment of the invention provides a Mini LED display device, which comprises a display panel.

As shown in fig. 1, the display panel 1 includes a substrate 11 and a plurality of light emitting diodes 12 disposed on the substrate 11, and a space is provided between any two adjacent light emitting diodes 12.

Illustratively, as shown in fig. 1, each of the light emitting diodes 12 may include a first light emitting diode 121 emitting red light, a second light emitting diode 122 emitting green light, and a third light emitting diode 123 emitting blue light. After being packaged, the light emitting diodes 12 are fixed on the substrate 11 by a patch method, and the light emitting diodes 12 are driven and controlled by a driving circuit provided on the substrate 11 to display an image.

In order to drive the leds 12, a driving line is usually fabricated at an interval between the leds 12, and since the leds 12 emit light by direct current driving, the required driving line has a certain width, so that the reduction of the spacing between the leds 12 is limited, and thus the current arrangement density of the leds 12 is low, which generates a distinct granular sensation in view and reduces the viewing experience.

Based on this, in some embodiments, as shown in fig. 2, the display panel 1 further includes a lens layer 13 disposed on the substrate 11 and located on a side of the light emitting diode 12 away from the substrate, and the lens layer 13 is configured to image the light emitting diode 12 through the lens layer 13, and increase the number of the imaged images relative to the unit area before the light emitting diode 12 is imaged, and decrease the pitch P.

The lens is an optical element made of a transparent substance such as an optical plastic (e.g., PC (Polycarbonate), PMMA (poly methacrylate), polymethylmethacrylate, UV (Ultraviolet) curable glue), etc. The lens is a refractor whose refracting surface is of a curved surface type with a certain radius of curvature, such as two spherical surfaces (part of a sphere) or more complex aspherical shapes, or one spherical surface (part of a sphere) and one plane. The image formed by the method has a real image and a virtual image.

In the case where the lens is a convex lens or a concave lens, the convex lens is a lens with a thicker center and a thinner edge. Such lenses can be classified into biconvex lenses (biconvex lenses), plano-convex lenses (plano-convex lenses), and meniscus lenses (concave-convex lenses). When the lens is a concave lens, the concave lens is a thin-centered, thick-edged lens. Such lenses can be classified into biconcave lenses (biconcave lenses), plano-concave lenses (concave-sided, flat-sided lenses), and convex-concave lenses (convex-sided, concave-sided lenses).

For a convex lens, the imaging law is shown in fig. 3 and table 1 below.

TABLE 1

For a concave lens, the imaging law is as follows: when the object is a real object, an erect and reduced virtual image is formed, and the image and the object are on the same side of the lens.

According to the imaging rule of the convex lens and the concave lens, a lens layer 13 may be formed on the substrate 11 and on the side of the light emitting diode 12 away from the substrate 11, for example, the lens layer 13 may include one layer of lens, or may include multiple layers of lenses, by setting parameters of each layer of lens (such as curvature radius, focal length, refractive index, etc.) and the object distance of the led 12 relative to the lens 13, the pitch P between the led 12 and two adjacent leds 12 can be reduced, thereby, the number of images formed by the light emitting diode 12 through the lens layer 13 can be increased relative to the unit area of the light emitting diode 12 before the images are formed, the pitch can be reduced, compared with the prior art that the pitch P of the light emitting diodes 12 cannot be reduced, the fineness of the displayed picture can be improved, and thus the quality of the displayed picture can be improved.

The number of the lenses in the lens layer 13, and the type (e.g., convex lens or concave lens) and the number of the lenses in each layer are not particularly limited. The pitch may be reduced by imaging the light emitting diode 12 through the lens layer 13 and increasing the number of images per unit area of the light emitting diode 12 before imaging.

In some embodiments, as shown in fig. 2, the lens layer 13 includes a transparent substrate 131, and a plurality of lenses 132 disposed on a side of the transparent substrate 131 away from the substrate 11. The plurality of lenses 132 are disposed in the same plane perpendicular to the thickness direction of the substrate 11 and arranged in an array.

The following relationship exists between the lens 132 and the light emitting diode 12:

in the plurality of lenses 132, the distance W between the optical centers O of any two adjacent lenses 132 is greater than or equal to 0.7 times the distance P between two adjacent light emitting diodes 12 and less than or equal to 2 times the distance P between two adjacent light emitting diodes 12; the vertical distance u between each of the light emitting diodes 12 and the plane of the optical center O of the lens 132 is greater than or equal to 1.0 times the pitch P between two adjacent light emitting diodes 12 and less than or equal to 4 times the pitch P between two adjacent light emitting diodes 12.

In the present embodiment, by disposing a layer of lenses 132 on the transparent substrate 131 and making the lenses 132 in the layer of lenses 132 and the leds 12 satisfy the above corresponding relationship, the number of the leds 12 per unit area before and after imaging is simulated by using optical simulation software, and the simulation result is as shown in fig. 4a and 4b, and it can be known from fig. 4a and 4b that: the light emitting diodes 12 are arranged in a matrix form, and before imaging, the number of pitches P between two adjacent light emitting diodes 12 in one row of the unit area of the light emitting diodes 12 is 6, and after imaging through the lens layer 13, the number of pitches P after imaging between two adjacent light emitting diodes 12 in one row of the unit area of the light emitting diodes 12 is 8.4, which means that the pitches P between two adjacent light emitting diodes 12 after imaging are reduced, the number of pitches P is increased, and the number (density) of the unit areas of the light emitting diodes 12 is also increased. In the meantime, when fig. 4a is compared with fig. 4b, it can be seen that: after the optical imaging transformation of the lens layer 13, the arrangement directions of the first light emitting diode 121, the second light emitting diode 122 and the third light emitting diode 123 are changed by 180 °. This is because: according to the imaging rule of the convex lens, the light emitting diode 12 forms an inverted and reduced real image after being imaged by the lens 13.

As is apparent from fig. 4a and 4b, the lens 132 and the light emitting diode 12 in the single layer of the lens 132 satisfy the above correspondence relationship, thereby preventing distortion of the screen and being applicable to actual product production.

It should be noted that, although only the case where the lens 132 is a plano-convex lens is illustrated above, it can be understood by those skilled in the art that, in practical applications, the lens 132 may also be a biconvex lens, a concave-convex lens, a plano-concave lens, a biconcave lens, or the like, and when the lens 132 is a concave lens, the distance between the plane where the optical center O of the lens 132 is located and the light emitting diode 12 needs to be adjusted according to the imaging rule of the concave lens.

In addition, only the case that the arrangement of the lenses 132 is arranged in a matrix form as shown in fig. 5 is shown above, the specific arrangement of the lenses 132 may also be set reasonably according to the arrangement of the light emitting diodes 12, so that the distance between the optical centers O of any two adjacent lenses 132 is greater than or equal to 0.7 times of the distance P between two adjacent light emitting diodes and is less than or equal to 2 times of the distance P between two adjacent light emitting diodes 12.

For example, a plurality of the lenses 132 may be arranged in a staggered array.

Meanwhile, in the present embodiment, the shape of the orthographic projection of the lens 132 on the substrate 11 is also not particularly limited. This embodiment only shows a case where the orthographic projection of the lens 132 on the substrate 11 is rectangular in shape (as shown in fig. 5 and 6). It can be understood by those skilled in the art that the shape of the orthographic projection of the lens 132 on the substrate 11 can also be triangular, polygonal, etc., and the same technical effect can be achieved as that the shape of the orthographic projection of the lens 132 on the substrate 11 is rectangular.

In addition, it should be noted that, in the present embodiment, two adjacent lenses 132 may be closely arranged (that is, there is no space between the two lenses, and the edges overlap each other), or there may be a certain space between the two lenses. As shown in fig. 5, only the situation of close arrangement between two adjacent lenses 132 is shown, and it can be understood by those skilled in the art that, in the actual manufacturing process, parameters (such as refractive index, curvature radius, focal length, etc.) of the lenses 132 and the corresponding relationship between the lenses 132 and the light emitting diodes 12 can be adjusted according to specific imaging conditions, and the above technical effects can also be achieved by the same or similar modifications as the embodiment of the present invention, and a certain distance is provided between two adjacent lenses 132.

In other embodiments, as shown in FIG. 2, the material of the transparent substrate 131 and the material of the lens 132 may be the same or different. And is not particularly limited herein.

Alternatively, the material of the lens substrate 131 and the material of the lens 132 are different. In this way, even when the total thickness of the lens layer 13 and the radius of curvature of the lens 132 are constant during the manufacturing process, the pitch P of the light emitting diodes 12 can be adjusted by adjusting the refractive index of the lens layer 13.

The material of the transparent substrate 131 may be glass, PC (Polycarbonate), acryl, or the like. The material of the lens 132 may be OCA (Optically Clear Adhesive) or UV (Ultraviolet) curable Adhesive.

Based on the above structure, in still other embodiments, as shown in fig. 7, the surface of the lens 132 away from the substrate 11 is provided with grooves U and/or protrusions T.

In this embodiment, by providing the groove U and/or the protrusion T on the surface of the lens 132 away from the substrate 11, the lens 132 not only can refract light and reduce the distance P between the leds 12, but also can scatter the refracted light, reduce surface reflection, and improve visual effect.

In another embodiment, as shown in fig. 2, a transparent material layer 14 is further disposed between the lens 13 and the light emitting diode 12, the transparent material layer 14 is in direct contact with the light emitting diode 12, and a height of the transparent material layer 14 away from the surface of the substrate 11 is higher than a height of the light emitting surface of the light emitting diode 12.

In this embodiment, by providing the transparent material layer 14, the light emitting diodes 12 and the driving lines provided at the spaced positions of the light emitting diodes 12 can be protected.

The material of the transparent material layer 14 may be a UV curable adhesive. The transparent material layer 14 may be made of black opaque paint with a certain transmittance. The black shading paint can also shield the light reflected by the light-emitting diode 12 and the light-reflecting structures such as copper wires on the substrate 11 from interfering with the display content.

The embodiment of the invention provides a display panel 1, by disposing a lens layer 13 on a substrate 11 and on a side of a light emitting diode 12 away from the substrate 11, and by reasonably setting the curvature radius and the focal length f of each layer of lenses 132 in the lens layer 13, the vertical distance u (i.e. the object distance) between the plane where the optical center of the lenses 132 is located and the light emitting diode 12, and the corresponding relationship between the lenses 132 and the light emitting diodes 12 (i.e. one lens 132 images several light emitting diodes 12) according to the imaging rule of the lenses (e.g. convex lenses and concave lenses), the distance P between the light emitting diodes 12 and two adjacent light emitting diodes 12 is a reduced image, i.e. the number of the formed images relative to the unit area of the light emitting diodes 12 before imaging is increased, the distance P is reduced, and compared with the distance P of the light emitting diodes 12 in the related art which cannot be reduced, the fine degree of the display picture can be improved, and therefore the quality of the displayed picture can be improved.

The specific structure of providing the lens layer 13 on the display panel 1 to reduce the pitch P of the light emitting diodes 12 and increase the number (density) of the light emitting diodes 12 per unit area, thereby improving the fineness of the drawing of the display panel 1 and the quality of the display image is improved, and the above-described manufacturing method (implementation manner) of the display panel 1 will be described in detail.

An embodiment of the present invention provides a method for manufacturing a display panel, as shown in fig. 8, including:

s1, as shown in fig. 9, a plurality of light emitting diodes 12 are formed on a substrate 11, and a pitch P is provided between any two adjacent light emitting diodes 12.

Here, the plurality of light emitting diodes 12 may be formed on the substrate 11 by means of punching. For the convenience of routing, a pitch P is provided between any two adjacent light emitting diodes 12.

S2, forming a lens layer 13 on the substrate 11 and on the side of the light emitting diode 12 away from the substrate 11, the lens layer 13 being configured to image the light emitting diode 12 through the lens layer 13, and to increase the number of images formed and to decrease the pitch relative to the unit area of the light emitting diode 12 before the light emitting diode is not imaged.

Wherein the lens layer 13 can be obtained by fabrication.

Illustratively, the convex lens or the concave lens with suitable parameters (such as refractive index, curvature radius, focal length, etc.) can be selected according to the imaging rules of the convex lens or the concave lens, and the convex lens or the concave lens is fixed on the side of the light emitting diode 12 away from the substrate 11 by adjusting the distance between the plane where the optical center of the convex lens or the concave lens is located and the light emitting diode 12, so that the purpose of increasing the number of the images formed by the light emitting diode 12 through the lens 13 and reducing the distance of the images compared with the unit area of the light emitting diode 12 before the images are formed can be achieved.

The lens layer 13 may include a lens layer or a multi-layer lens, and is not limited in this respect.

In some embodiments, as shown in fig. 2, in the case where the lens layer 13 includes a transparent base 131 and a plurality of lenses 132 disposed on a side of the lens base 131 away from the substrate 11; the lens layer 13 is formed on the substrate 11 and on a side of the led 12 away from the substrate 11, and includes:

s11, as shown in fig. 10, the transparent film 100 is formed on the transparent substrate 131.

Illustratively, the transparent film 100 may be formed on the transparent substrate 131 through a coating process.

S12, as shown in fig. 11, the transparent thin film is imprinted by a mold imprinting process to form a plurality of the lenses 132 on the transparent substrate 131.

In the case where the lens 132 is a plano-convex lens, the plano-convex lens can be formed on a planar metal mold surface during the manufacturing process, and then the plano-convex lens is transferred onto the roller mold 200, so as to form a large-area imprinting mold on the roller mold 200, and finally the plano-convex lens is formed on the transparent film by using a roll coating process.

S13, the transparent substrate 131 formed with the plurality of lenses 132 is adhered to the substrate 11 to form the lens layer 13.

For example, the transparent base 131 formed with a plurality of the lenses 132 and the substrate 11 formed with the light emitting diodes 12 may be attached together by a bonding process to form the lens layer 13.

In still other embodiments, where the surface of the lens 132 remote from the substrate 11 is provided with grooves U and/or protrusions T; before imprinting the transparent film 100 through the mold imprinting process, the method further includes:

forming a groove on the surface of the mold core of the mold through a carving process.

Here, a groove may be formed on the surface of the mold core of the metal plane mold, so that the groove U and/or the protrusion T are formed on the surface of the lens 132 after the final transfer.

In other embodiments, as shown in fig. 2, in the case where a transparent material layer 14 is further provided between the lens layer 13 and the light emitting diode 12; before forming the lens layer 13 on the substrate, the manufacturing method further includes:

as shown in fig. 12, the transparent material layer 14 is formed on the substrate 11, such that the transparent material layer 14 is directly contacted with the light emitting diode 12, and a height of the transparent material layer 14 away from the surface of the substrate 11 is higher than a height of the light emitting surface of the light emitting diode 12.

In this embodiment, the driving lines between the light emitting diodes 12 and the light emitting diodes 12 can also be protected by the transparent material layer 14.

The transparent material layer 14 may be made of black light-shielding paint with a certain transmittance to shield the light reflected by the light-emitting diode 12 and the light-reflecting structures such as copper traces on the substrate 11, so as to prevent the reflected light from interfering with the display content. At the time of fabrication, the black light-shielding paint may be formed on the substrate 11 by a spin coating process.

The beneficial technical effects of the preparation method of the display panel provided by the embodiment of the invention are the same as those of the display panel provided by the embodiment of the invention, and are not repeated herein.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.