CN111341222A

CN111341222A - Transparent display module and manufacturing method thereof

Info

Publication number: CN111341222A
Application number: CN202010273240.4A
Authority: CN
Inventors: 吴辉荣; 周勇; 余志铭
Original assignee: Xiamen Fuxiang Technology Co ltd
Current assignee: Xiamen Fuxiang Technology Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-06-26

Abstract

The invention discloses a transparent display module and a manufacturing method thereof, wherein the transparent display module comprises a substrate, a cover plate and LED lamp beads, wherein the LED lamp beads comprise a plurality of first lamp beads and a plurality of second lamp beads, and the first lamp beads are arranged on the first surface of the substrate and are electrically connected with first conductive circuits arranged on the first surface of the substrate; the second lamp bead sets up the second surface at the apron, and the second lamp bead is fixed at the second surface of apron through a plurality of electrically conductive supports that set up at the apron second surface to through electrically conductive support and the second conducting wire electric connection who sets up at the apron second surface. The double-layer LED lamp beads are arranged, so that the resolution of the transparent module is greatly improved; the conductive support adopted on the cover plate increases the stability of the reverse arrangement of the LED lamp beads, and the performance of the transparent display module is improved.

Description

Transparent display module and manufacturing method thereof

Technical Field

The present invention relates to a display screen, and more particularly, to a transparent display module and a method for manufacturing the same.

Background

With the rapid development of high-end building material industry, the transparent display screen is increasingly favored by designers and terminal application customers as a flexible and changeable application form presented by a high-end decorative material. The transparent display screen has the characteristics of permeability, explosion prevention, water prevention, ultraviolet ray prevention, designability and the like, and can be widely applied to indoor and outdoor purposes. In addition, due to the energy-saving characteristic of the LED, the transparent display screen is extremely power-saving, energy-saving and environment-friendly. Therefore, the transparent display screen is widely applied to various design and application end fields: such as commercial or furniture indoor and outdoor decoration, fitment, and decor; designing furniture; lighting design of the lamp tube; designing an indoor landscape; an indoor shower stall partition; a clinic; a house number; designing an emergency indicator; a meeting room partition; outdoor curtain wall glass, shop windows, special cabinet design, luxury special cabinet design, skylight design, ceiling design, sunlight room design, 3C product glass panel application, indoor and outdoor billboard design, fashion home decoration, clocks, prizes, lamps and other various terminal application product designs and other broad fields.

The currently mainstream components of transparent display screens include glass, Light Emitting Diodes (LEDs), and glass with transparent conductive traces (hereinafter referred to as transparent conductive glass). The light emitting diodes are arranged on the surface of the transparent conductive glass in an array distribution mode, the glass covers the light emitting diodes and the transparent conductive glass, and materials such as polyvinyl butyral (PVB) are arranged between the glass and the transparent conductive glass through an adhesive clamping process. Therefore, the transparent display screen capable of playing dynamic videos can be formed only by combining the signal control system to operate the light emitting diode.

In order to provide the signals required for the operation of the leds, a considerable number of conductive traces are formed on the surface of the transparent conductive glass, which are connected to the leds respectively. However, due to the limitations of conductive circuits, processes, materials, and the like, the leds cannot be densely arranged, and the dot density of the leds cannot be increased. The limitation of the lattice density of the light emitting diode also leads to the fact that the resolution ratio which can be displayed by the transparent display screen cannot be further improved, and the requirement of screen definition cannot be met. Due to the fact that the distance is too large, the resolution ratio of the LED photoelectric glass is low, the use attractiveness performance is poor, the resolution ratio is limited, the difficulty is high, and the market requirement is difficult to meet.

Disclosure of Invention

In order to solve the problems and the defects of the existing LED display screen, the invention aims to provide a transparent display module which has high resolution, strong stability, simple structure and convenient production and a manufacturing method thereof so as to overcome the existing problems.

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

a transparent display module comprises a substrate, a cover plate and LED lamp beads, wherein the LED lamp beads comprise a plurality of first lamp beads and a plurality of second lamp beads, the first lamp beads are arranged on a first surface of the substrate and are electrically connected with first conducting circuits arranged on the first surface of the substrate; the second lamp pearl sets up the second surface of apron, the second lamp pearl is in through a plurality of settings the electrically conductive support of apron second surface is fixed the second surface of apron, and pass through electrically conductive support with set up and be in the second conducting wire electric connection of apron second surface, first lamp pearl with the second lamp pearl all faces the second surface of apron is luminous.

Preferably, the conductive support is a film support, and the film support is respectively connected with the second lamp bead and the cover plate through solder.

Preferably, the film support is an FPC (flexible circuit board) support, and the FPC support is electrically connected to the second lamp bead and the second conductive circuit through solder respectively.

Preferably, the electrically conductive support is a pad support, the pad support with pin integrated into one piece of second lamp pearl and along the extension of second lamp pearl body direction, the pad support pass through the solder with second conducting wire electricity on the apron is connected, just the thickness of pad support is greater than the height of second lamp pearl body.

Preferably, the first lamp beads are arranged on the first surface of the substrate to form a first light emitting surface, and the first lamp beads are arranged in a matrix shape along a first direction and a second direction, the first direction and the second direction are parallel to the first light emitting surface and are perpendicular to each other, and the distance between two adjacent first lamp beads in the first direction is twice the distance between two adjacent first lamp beads in the second direction; the second lamp beads are arranged on the second surface of the cover plate to form a second light emitting surface, the second light emitting surface and the first light emitting surface are parallel to each other and are arranged up and down, the second lamp beads are arranged in a matrix shape along a first direction and a second direction, and the distance between every two adjacent second lamp beads in the first direction is twice the distance between every two adjacent second lamp beads in the second direction; and the middle positions of two adjacent first lamp beads in the first direction are vertically corresponding to the position of the second light-emitting surface, and one second lamp bead is arranged.

Preferably, the transparent display module further comprises a control device electrically connected with the first conductive circuit and the second conductive circuit, and the control device is electrically connected with the first lamp bead and the second lamp bead through the first conductive circuit and the second conductive circuit so as to enable the transparent display module to present patterns.

Preferably, the base plate and the cover plate are bonded by a film of thermoplastic material.

The invention also provides a transparent display screen which comprises a plurality of transparent display modules, wherein the transparent display modules are connected through a connecting structure to form the transparent display screen.

The invention also comprises a manufacturing method of the transparent display module, which comprises the following steps:

the method comprises the steps that photoresist is dotted at the position where LED lamp beads are arranged on the first surface of a substrate, a first layer of LED lamp beads are solidified on the photoresist to form a plurality of first lamp beads fixed on the first surface of the substrate, and the first lamp beads are electrically connected with first conducting circuits arranged on the first surface of the substrate;

forming a conductive support on a second layer of LED lamp beads arranged on a second surface of the cover plate, fixing the second layer of LED lamp beads on the second surface of the cover plate through the conductive support to form a plurality of second lamp beads fixed on the second surface of the cover plate, wherein the plurality of second lamp beads are electrically connected with a second conductive circuit arranged on the second surface of the cover plate;

and (2) carrying out glue clamping treatment on the substrate provided with the first lamp beads and the cover plate provided with the second lamp beads by adopting a thermoplastic material film, keeping the light emitting directions of the first lamp beads and the second lamp beads consistent, emitting light towards the first surface of the cover plate, and bonding the substrate and the cover plate together to form the transparent display module.

Preferably, the step of forming the conductive support comprises: preparing an FPC (flexible printed circuit) as a soft film carrier, performing hollow-out treatment on the position, on the FPC, where a second layer of LED lamp beads are arranged, and arranging the second layer of LED lamp beads in the hollow-out area; the second layer of LED lamp beads are electrically connected with the conductive circuit on the first surface of the FPC through welding; the connecting portion of FPC and second layer LED lamp pearl forms the film support, the film support is electrically conductive support.

Preferably, the step of fixing the second layer of LED beads on the second surface of the cover plate through the conductive support to form a plurality of second beads fixed on the second surface of the cover plate includes:

attaching the second surface of the FPC to the second surface of the cover plate; the second layer of LED lamp beads is electrically connected with the second conducting circuit of the cover plate through the film support;

peeling the FPC from the second surface of the cover plate; the second layer of LED lamp beads are fixed on the second surface of the cover plate through the film support to form a plurality of second lamp beads fixed on the second surface of the cover plate.

Preferably, the step of forming the conductive support comprises: forming pins of the second layer of LED lamp beads in an integrated forming mode, and forming a pad support along the bead body direction of the second layer of LED lamp beads, wherein the pad support and the pins of the second layer of LED lamp beads are integrally formed and extend along the bead body direction of the second layer of LED lamp beads, and the thickness of the pad support is greater than the height of the second layer of LED lamp bead bodies; the pad support forms the conductive support.

Preferably, the step of fixing the second layer of LED beads on the second surface of the cover plate through the conductive support to form a plurality of second beads fixed on the second surface of the cover plate includes: and the bonding pad support fixes the second layer of LED lamp beads on the second surface of the cover plate in a welding mode to form a plurality of second lamp beads fixed on the second surface of the cover plate.

By adopting the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the LED lamp beads are arranged on the two layers of the cover plate substrate, so that the resolution of the transparent module is greatly improved; the conductive support effectively fills the gap between the LED lamp bead and the conductive circuit, ensures the stability of reverse arrangement of the LED lamp bead, improves the product performance, and is convenient to produce.

2. The invention has simple structure and convenient production, is beneficial to improving the production efficiency and improves the yield of the transparent display module.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic perspective exploded view of a transparent display module according to the present invention.

Fig. 2 is a cross-sectional view of a transparent display module according to an embodiment of the invention.

Fig. 3 is a cross-sectional view of another embodiment of a transparent display module according to the present invention.

Fig. 4 is a cross-sectional view of a second lamp bead in fig. 3.

Fig. 5 is a perspective view of a second lamp bead in fig. 3.

Fig. 6 is a top view of the transparent display module according to the present invention.

Fig. 7 is a manufacturing flow chart of the transparent display module according to the present invention.

Fig. 8 is a detailed flowchart of step S2 in fig. 7.

Fig. 9 is a top view of the FPC in step S2 in fig. 7.

Fig. 10 is a schematic view illustrating the formation of the conductive bracket in step S2 of fig. 7.

Fig. 11 is a schematic structural diagram of a transparent display screen provided by the present invention.

Description of the symbols:

1 transparent display module

11 substrate

L LED lamp bead

L1 first lamp bead

12 cover plate

L2 second lamp bead

L2A second lamp pearl pin

L2B second lamp bead body

13 conductive support

S1 first surface of substrate

Second surface of cover plate of S2

131 film support

1311 FPC

1312 tailoring line

S hollow area

132 pad holder

14 film of thermoplastic material

D1 first direction

D2 second direction

h second bead height

d pad support thickness

E1 first conductive trace

E2 second conductive trace

10 transparent display screen

10a connecting structure

D3 second bead body direction

Detailed Description

Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present invention. The present invention may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "upper surface", "lower surface", "above", "below", "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or component being referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, fig. 1 is a schematic perspective exploded view of a transparent display module according to the present invention. As shown in fig. 1, the transparent display module 1 includes a substrate 11, a cover plate 12 and LED beads L, where the LED beads L include a plurality of first beads L1 and a plurality of second beads L2, and the first beads L1 are disposed on a first surface S1 of the substrate 11 and electrically connected to a first conductive circuit E1 disposed on the first surface S1 of the substrate 11; the second light beads L2 are disposed on the second surface S2 of the cover plate 12, and the second light beads L2 are fixed on the second surface S2 of the cover plate 12 by a plurality of conductive brackets 13 disposed on the second surface S2 of the cover plate 12. The second lamp bead pin L2A is electrically connected to the second conductive trace E2 on the second surface S2 of the cover plate 12 through the conductive bracket 13. The first lamp bead L1 and the second lamp bead L2 both emit light towards the second surface S2 of the cover plate. The transparent display module 1 further includes a control device (not shown in the figure) electrically connected to the first conductive circuit E1 and the second conductive circuit E2, and the control device is electrically connected to the first lamp bead L1 and the second lamp bead L2 through the first conductive circuit E1 and the second conductive circuit E2, respectively, so as to make the transparent display module present a pattern. The substrate 11 and the cover plate 12 are bonded by a thermoplastic film 14 to form the transparent display module 1.

In the embodiment, the substrate 11 and the cover plate 12 are transparent substrates, and may be hard substrates such as glass; it may also be a flexible substrate such as PET. First lamp pearl L1 and second lamp pearl L2 can be monochromatic lamp pearl, three-colour lamp pearl or four-colour lamp pearl, can adopt SMD encapsulation. The first conductive trace E1 and the second conductive trace E2 may be made of a transparent conductive material such as indium tin oxide ITO (ITO) or fluorine doped tin oxide (FTO); or made of metal conductive materials, such as copper, silver, nano silver and the like. The thermoplastic film 14 may be polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA).

Referring to fig. 2, fig. 2 is a partial cross-sectional view of a transparent display module according to the present invention. In an embodiment of the present invention, the conductive support 13 is a film support 131. The film holder 131 is made of FPC. In this embodiment, the FPC is electrically connected to the second light bead L2 and the second conductive trace E2 through solder respectively. As shown in fig. 2, the film support 131 is disposed on the second lamp bead pin L2A, and the second lamp bead L2 and the second conductive trace E2 are connected, so as to compensate for the height difference between the second lamp bead pin L2A and the cover plate 12. In this embodiment, the FPC is connected to the second lamp bead pins through solder paste, and is connected to the second conductive trace E2 through silver paste.

Referring to fig. 3 to 5, fig. 3 is a partial cross-sectional view of a transparent display module according to the present invention. In another embodiment of the present invention, the conductive support 13 is a pad support 132. As shown in fig. 4 and 5, fig. 4 is a cross-sectional view of the second lamp bead in fig. 3, fig. 5 is a perspective view of the second lamp bead in fig. 3, the pad holder 132 is integrally formed with the second lamp bead pin L2A of the second lamp bead L2 and extends along the direction D3 of the second lamp bead body L2B, and the pad holder 132 is electrically connected to the second conductive circuit E2 on the cover plate through solder. The thickness d of the pad holder 132 is greater than the height h of the second lamp bead L2B to facilitate the placement of the second lamp bead L2B. In this embodiment, the pad holder 132 is connected to the second conductive traces E2 through silver paste.

In the above embodiment, the solder is determined by the actually corresponding conductive circuit material or the conductive material is selected, for example, if the conductive circuit is made of ITO, the conductive material may be selected to use silver paste; if the conductive traces are formed from FPC, solder paste may be optionally used. The solder paste can be selected from Sn-Ag-Cu-Sn paste, Sn-Ag-Bi-Sn paste, Sn-Pb-Sn paste or Sn-Pb-Ag-Sn paste.

Referring to fig. 6, fig. 6 is a top view of the transparent display module according to the present invention. As shown in fig. 6, the first lamp beads L1 are disposed on the first surface S1 of the substrate 11 to form a first light emitting surface, and the first lamp beads L1 are arranged in a matrix along the first direction D1 and the second direction D2, the first direction D1 and the second direction D2 are parallel to the first light emitting surface and perpendicular to each other, and a distance between two adjacent first lamp beads L1 in the first direction D1 is twice a distance between two adjacent first lamp beads L1 in the second direction D2; the second lamp beads L2 are arranged on the second surface S2 of the cover plate to form a second light-emitting surface, the second light-emitting surface and the first light-emitting surface are parallel to each other and are arranged up and down, the second lamp beads L2 are arranged in a matrix shape along the first direction D1 and the second direction D2, and the distance between every two adjacent second lamp beads L2 in the first direction D1 is twice the distance between every two adjacent second lamp beads L2 in the second direction D2; the middle position of two adjacent first lamp beads L1 in the first direction D1 is vertically provided with a second lamp bead L2 corresponding to the position of the second light-emitting surface.

Referring to fig. 11, the present invention further provides a transparent display screen 10. The transparent display screen 10 comprises a plurality of transparent display modules 1 provided by the invention, and the transparent display screens 10 are formed by connecting the plurality of transparent display modules 1 through a connecting structure 10 a.

Referring to fig. 7, a method for manufacturing a transparent display module according to the present invention includes the following steps:

s1, dispensing photoresist at the position where the LED lamp beads are arranged on the first surface of the substrate, curing the first layer of LED lamp beads on the photoresist to form a plurality of first lamp beads fixed on the first surface of the substrate, wherein the first lamp beads are electrically connected with first conductive circuits arranged on the first surface of the substrate;

s2, forming a conductive support on a second layer of LED lamp beads arranged on the second surface of the cover plate;

s3, fixing the second layer of LED lamp beads on the second surface of the cover plate through a conductive support to form a plurality of second lamp beads fixed on the second surface of the cover plate, wherein the plurality of second lamp beads are electrically connected with a second conductive circuit arranged on the second surface of the cover plate;

and S4, adopting a thermoplastic material film to carry out glue clamping treatment on a substrate provided with a plurality of first lamp beads and a cover plate provided with a plurality of second lamp beads, keeping the light emitting directions of the first lamp beads and the second lamp beads consistent, emitting light towards the second surface of the cover plate, and bonding the substrate and the cover plate together to form the transparent display module.

Referring to fig. 8 to 10, in an embodiment, the step of forming the second bead fixed on the second surface of the cover plate includes:

SS1, preparing an FPC1311 as a soft film carrier, performing hollow processing at the position where the second layer of LED lamp beads are arranged on the FPC1311, and arranging the second layer of LED lamp beads in the hollow area S;

SS2, electrically connecting the second layer of LED lamp beads with the conductive circuit on the first surface of the FPC1311 through welding; the connection part of the FPC1311 and the second layer of LED lamp beads forms a film support 131, and in this embodiment, the film support 131 is a conductive support;

SS3, attaching the second surface of the FPC1311 to the second surface of the cover plate; the second layer of LED lamp beads is electrically connected with the second conductive circuit of the cover plate through the film bracket 131;

SS4, peeling the FPC1311 from the second surface of the cover plate; the film support 131 and the second layer of LED lamp beads are fixed on the second surface of the cover plate through the film support 131 to form a plurality of second lamp beads L2 fixed on the second surface of the cover plate. The peeling process is a process of leaving the second layer of lamp beads attached with the film support 131 by leaving the tailor lines 1312 corresponding to the film support 131 on the FPC1311, closely attaching the second layer of lamp beads to the FPC1311 in a chip mounter manner, and then tearing off the FPC1311 along the tailor lines 1312.

Referring to fig. 4 and 5, in another embodiment, the step of forming the second bead fixed on the second surface of the cover plate includes:

forming pins of the second layer of LED lamp beads in an integrated forming mode, forming a pad support 132 along the bead body direction of the second layer of LED lamp beads, integrally forming the pad support 132 and the pins L2A of the second layer of LED lamp beads and extending along the direction D3 of the second layer of LED lamp bead bodies L2B, wherein the thickness D of the pad support 132 is greater than the height h of the second layer of LED lamp bead bodies; in this implementation, the pad support 132 is a conductive support, and the second layer of LED beads is fixed on the second surface of the cover plate by the pad support 132 in a welding manner to form second beads L2 fixed on the second surface of the cover plate.

In the embodiment of the invention, a certain height difference exists between the second lamp bead and the cover plate so as to ensure that the light emitting surfaces of the first lamp bead and the second lamp bead are on the same plane as much as possible, thereby obtaining a better display effect. Therefore, the thickness d of the conductive support adopted by the embodiment of the invention is larger than the height h of the second lamp bead body. Meanwhile, the arrangement of the conductive support adopted by the invention has no restriction on the packaging of the second lamp beads, and the LED lamp beads are suitable for various LED lamp beads, such as single-color LED lamp beads or multi-color LED lamp beads.

According to the invention, the arrangement that the LED lamp beads are arranged on the two sides of the cover plate substrate is adopted, so that the resolution of the transparent module can be greatly improved; the setting of conducting support is effectual has filled the clearance between LED lamp pearl and the conducting wire, the production of being convenient for. The two conductive supports provided by the invention respectively adopt the modes of the film support and the pad support, the scheme has wide application range, simple structure and convenient production, and is beneficial to improving the production efficiency and the yield.

While the foregoing specification illustrates and describes the preferred embodiments of this invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A transparent display module comprises a substrate, a cover plate and LED lamp beads, and is characterized in that the LED lamp beads comprise a plurality of first lamp beads and a plurality of second lamp beads, the first lamp beads are arranged on a first surface of the substrate and are electrically connected with first conductive circuits arranged on the first surface of the substrate; the second lamp pearl sets up the second surface of apron, the second lamp pearl is in through a plurality of settings the electrically conductive support of apron second surface is fixed the second surface of apron, and pass through electrically conductive support with set up and be in the second conducting wire electric connection of apron second surface, first lamp pearl with the second lamp pearl all faces the second surface of apron is luminous.

2. The transparent display module of claim 1, wherein the conductive support is a film support, and the film support is connected to the second bead and the cover plate by solder respectively.

3. The transparent display module of claim 2, wherein the film support is an FPC support, and the FPC support is electrically connected to the second bead and the second conductive trace respectively through solder.

4. The transparent display module of claim 1, wherein the conductive support is a pad support, the pad support is integrally formed with the pins of the second lamp bead and extends along the direction of the second lamp bead body, the pad support is electrically connected with the second conductive circuit on the cover plate through solder, and the thickness of the pad support is greater than the height of the second lamp bead body.

5. The transparent display module of any one of claims 1-4, wherein the first beads are disposed on the first surface of the substrate to form a first light emitting surface, and the first beads are arranged in a matrix along a first direction and a second direction, the first direction and the second direction are parallel to the first light emitting surface and perpendicular to each other, and the distance between two adjacent beads in the first direction is twice the distance between two adjacent beads in the second direction; the second lamp beads are arranged on the second surface of the cover plate to form a second light emitting surface, the second light emitting surface and the first light emitting surface are parallel to each other and are arranged up and down, the second lamp beads are arranged in a matrix shape along a first direction and a second direction, and the distance between every two adjacent second lamp beads in the first direction is twice the distance between every two adjacent second lamp beads in the second direction; and the middle positions of two adjacent first lamp beads in the first direction are vertically corresponding to the position of the second light-emitting surface, and one second lamp bead is arranged.

6. The transparent display module of claim 1, further comprising a control device electrically connected to the first conductive trace and the second conductive trace, the control device electrically connecting the first lamp bead and the second lamp bead through the first conductive trace and the second conductive trace for rendering the transparent display module with a pattern.

7. The transparent display module of claim 1, wherein the substrate and cover plate are bonded by a thin film of thermoplastic material.

8. A transparent display screen, characterized by, include a plurality of the transparent display module assembly of claim 1, a plurality of transparent display module assemblies pass through connection structure and connect and constitute transparent display screen.

9. A manufacturing method of a transparent display module comprises the following steps:

10. The method of claim 9, wherein the step of forming the conductive support comprises: preparing an FPC (flexible printed circuit) as a soft film carrier, performing hollow-out treatment on the position, on the FPC, where a second layer of LED lamp beads are arranged, and arranging the second layer of LED lamp beads in the hollow-out area; the second layer of LED lamp beads are electrically connected with the conductive circuit on the first surface of the FPC through welding; and the connection part of the FPC and the second layer of LED lamp beads forms a film support, and the film support is the conductive support.

11. The method of claim 10, wherein the step of fixing the second layer of LED beads to the second surface of the cover plate via the conductive support to form a plurality of second beads comprises:

12. The method of claim 9, wherein the step of forming the conductive support comprises: forming pins of the second layer of LED lamp beads in an integrated forming mode, and forming a pad support along the bead body direction of the second layer of LED lamp beads, wherein the pad support and the pins of the second layer of LED lamp beads are integrally formed and extend along the bead body direction of the second layer of LED lamp beads, and the thickness of the pad support is greater than the height of the second layer of LED lamp bead bodies; the pad support is the conductive support.

13. The method of claim 12, wherein the step of fixing the second layer of LED beads to the second surface of the cover plate via the conductive bracket to form a plurality of second beads fixed to the second surface of the cover plate comprises: and the bonding pad support fixes the second layer of LED lamp beads on the second surface of the cover plate in a welding mode to form a plurality of second lamp beads fixed on the second surface of the cover plate.