A rolled copper circuit display screen and its production process

Abstract

The present invention discloses a rolled copper circuit display screen and a production process thereof, comprising a substrate layer, a rolled copper circuit layer and an adhesive layer, wherein the substrate layer comprises an upper substrate and a lower substrate, the adhesive layer comprises an upper adhesive layer and a lower adhesive layer, the upper substrate is connected to the rolled copper circuit layer through the upper adhesive layer, and the lower substrate is connected to the rolled copper circuit layer through the lower adhesive layer; the rolled copper circuit layer comprises a rolled copper circuit board, a plurality of LED lamp beads are connected to the surface circuit of the rolled copper circuit board, a pressing protrusion is arranged between the bottom of the rolled copper circuit board and the lower adhesive layer, and a pressing groove matching the pressing protrusion is formed on the surface of the lower adhesive layer. The present invention prepares the rolled copper circuit board by adopting a film etching process, which not only makes the prepared rolled copper circuit display screen extremely transparent and has excellent toughness, but also improves the stability of the display screen.

Description

Technical Field

[0001] The invention belongs to the technical field of photoelectric display screens, and in particular relates to a rolled copper circuit display screen and a production process thereof. Background Art

[0002] With the rapid development of the economy, the market promotion platform has been continuously upgraded and transformed, people's consumption concepts have been continuously improved, and their tastes have gradually increased. They have turned from traditional black screens to transparent screens, and from the past black screens with high energy consumption, bulky size, unstable safety and low-end display effects to the current transparent screens with energy saving, environmental protection, lightness, exquisiteness, high stability, and high-end and novel display images. After the traditional black screens with high energy consumption, bulky size, unstable safety and low-end display effects turned to relatively high-end transparent screens, many shortcomings of transparent screens have gradually emerged, such as the rigid and clumsy grille transparent screen, the fixed structure cannot form a structural fusion with the glass, the large space occupied, and the complex installation method; for example, the glass transparent screen cannot be repaired, the body is bulky, the production process is complicated, the display effect is poor, and a lot of resources are wasted; for example, the film transparent screen has poor assembly accuracy, and after being pasted on the glass, a large number of bubbles are accumulated due to heat, which seriously affects the display effect, and the installation and maintenance costs are greatly wasted.

[0003] At present, rolled copper circuit display screens have gradually replaced the position of film display screens. Rolled copper foil is a product made by repeatedly rolling and annealing high-precision copper strips using the principle of plastic processing. Its ductility, bending resistance and conductivity are better than electrolytic copper foil, and its copper purity is also higher than electrolytic copper foil. It is an indispensable main raw material for making printed circuit boards, copper clad laminates and lithium-ion batteries; however, during the production process of rolled copper circuit display screens, there are several disadvantages:

[0004] (1) Since the rolled copper is not flat as a whole, the etching area is easily atomized during the film etching process, with poor permeability, which affects the yield rate;

[0005] (2) The circuit boards inside the existing film display screens are relatively thick and have poor light transmittance, which results in the display screens being not only more complicated to process during production, but also having low transparency after being finished, which affects the visual effect.

[0006] Therefore, it is necessary to invent a rolled copper circuit display screen and a production process thereof to solve the above problems. Summary of the invention

[0007] In view of the above problems, the present invention provides a rolled copper circuit display screen and a production process thereof to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a rolled copper circuit display screen, comprising a substrate layer, a rolled copper circuit layer and an adhesive layer, wherein the substrate layer comprises an upper substrate and a lower substrate, and the adhesive layer comprises an upper adhesive layer and a lower adhesive layer, wherein the upper substrate is connected to the rolled copper circuit layer via the upper adhesive layer, and the lower substrate is connected to the rolled copper circuit layer via the lower adhesive layer;

[0009] The rolled copper circuit layer includes a rolled copper circuit board, and a plurality of LED lamp beads are connected to the surface circuit of the rolled copper circuit board. A pressing protrusion is arranged between the bottom of the rolled copper circuit board and the lower bonding layer, and a pressing groove matching the pressing protrusion is formed on the surface of the lower bonding layer. A plurality of lamp bead grooves corresponding to the positions of the LED lamp beads are opened at the bottom of the upper substrate surface, and the surface of the upper bonding layer is located between the LED lamp beads and the lamp bead grooves to form a bonding adhesive layer.

[0010] Furthermore, a sealing frame is arranged around the substrate layer, the rolled copper circuit layer and the adhesive layer, and a power box is arranged on one side of the sealing frame. A control board is arranged inside the power box. The output end of the control board is electrically connected to the rolled copper circuit board of the rolled copper circuit layer, and the input end is electrically connected to an external power supply.

[0011] Furthermore, the inner diameter of the lamp bead groove is larger than the outer diameter of the LED lamp bead, equal to the sum of the thickness of the LED lamp bead and the bonding adhesive layer, and the depth of the lamp bead groove is smaller than the thickness of the upper substrate layer.

[0012] Furthermore, the substrate layer is made of PET material and has a thickness of 125-500um.

[0013] Furthermore, the LED lamp beads are arranged in patches, and the LED lamp beads are arranged in multiple rows and columns. The distance between two adjacent LED lamp beads in the same column is 3-200mm, and the distance between adjacent LED lamp beads in the same row is 3-200mm.

[0014] Furthermore, the inner diameter length and width of the lamp bead groove are both 1.5-4 mm, and the thickness between the inner top wall of the lamp bead groove and the surface of the upper substrate is 0.2-3 mm.

[0015] Furthermore, the rolled copper circuit layer is made of rolled copper material, one side of which is plated with silver or matte black, and the thickness of the rolled copper circuit board of the rolled copper circuit layer is 8-50 um.

[0016] The present invention also discloses a production process of a rolled copper circuit display screen, comprising the following steps:

[0017] S1: First, the rolled copper sheet with a thickness of 5-50um is pressed together with the substrate layer of high-temperature resistant special PET using double-sided optical adhesive;

[0018] S2: Then the circuit to be etched is transferred to two identical films by photolithography, and then the films are aligned by manual alignment or machine alignment, and then the rolled copper coated with photosensitive ink or affixed with photosensitive dry film is placed in the middle of the film, and exposed after suction to prepare a rolled copper circuit board, and then the LED lamp bead patch is welded on the surface of the rolled copper circuit board to form a rolled copper circuit layer;

[0019] S3: After the rolled copper circuit board is etched by film, the etched area is atomized, and then liquid UV glue is evenly coated on the surface of the entire rolled copper circuit board. The hydraulic UV glue fills the surface of the rolled copper circuit board and the substrate layer to form a lower bonding layer, and a pressing groove is formed on the surface of the lower bonding layer. After the hydraulic UV glue fills the inside of the pressing groove, it is left to stand or vacuumed by a vacuum machine, and then ultraviolet light is used for curing to form a pressing protrusion, and a rolled copper circuit board with strong permeability and toughness connected to the lower substrate is formed;

[0020] S4: Use a die cutter to dig grooves at positions corresponding to the LED lamp beads on the lower surface of the upper substrate to form lamp bead grooves, and the inner top wall of the lamp bead grooves is not connected to the upper surface of the upper substrate, then place the lower surface of the upper lamp groove on a table, use a glue dispenser to dispense glue inside the lamp bead groove, and brush PVB glue on the surface, then dispense glue inside the lamp bead groove again until the UV glue overflows, and finally press the lower substrate equipped with the rolled copper circuit layer with the upper substrate, so that the PVB glue brushed on the surface of the upper substrate forms an upper bonding layer, and the UV glue inside the lamp bead groove forms a bonding glue layer;

[0021] S5: Cut off the extruded PVB glue, and then seal the surroundings with a sealing frame, and then install the power box with one side of the sealing frame, so that the control board inside the power box is welded to the rolled copper circuit layer, and the rolled copper circuit display screen is prepared.

[0022] Technical effects and advantages of the present invention:

[0023] 1. The present invention adopts a film etching process to prepare a rolled copper circuit board, which not only makes the prepared rolled copper circuit display screen extremely transparent and has excellent toughness, but also improves the stability of the display screen.

[0024] 2. The present invention opens an impermeable lamp bead groove on the surface of the upper substrate and dispenses glue inside the lamp bead groove, which will not produce bubbles and atomization effects, making it more permeable and further ensuring the flatness of the surface of the rolled copper circuit display screen, making it easy to realize production line production with high efficiency.

[0025] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The overall structural diagram of an embodiment of the present invention is shown;

[0028] Figure 2 The overall structure of the embodiment of the present invention is shown in different directions;

[0029] In the figure: 1, substrate layer; 101, upper substrate; 102, lower substrate; 2, rolled copper circuit layer; 201, rolled copper circuit board; 202, LED lamp beads; 203, lamp bead slots; 3, adhesive layer; 301, upper adhesive layer; 302, lower adhesive layer; 303, bonding adhesive layer; 4, pressing protrusions; 5, pressing grooves; 6, sealing frame; 7, power box; 8, control board. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a rolled copper circuit display screen, such as Figure 1-2 As shown, it includes a substrate layer 1, a rolled copper circuit layer 2 and a bonding layer 3, the substrate layer 1 includes an upper substrate 101 and a lower substrate 102, the bonding layer 3 includes an upper bonding layer and a lower bonding layer 302, the upper substrate 101 is connected to the rolled copper circuit layer through the upper bonding layer 301, and the lower substrate 102 is connected to the rolled copper circuit layer 2 through the lower bonding layer 302;

[0032] The rolled copper circuit layer 2 includes a rolled copper circuit board 201, and the surface circuit of the rolled copper circuit board 201 is connected to a plurality of LED lamp beads 202. A pressing protrusion 4 is arranged between the bottom of the rolled copper circuit board 201 and the lower bonding layer 302. A pressing groove 5 matching the pressing protrusion 4 is formed on the surface of the lower bonding layer 302. A plurality of lamp bead grooves 203 corresponding to the positions of the LED lamp beads 202 are opened at the bottom of the surface of the upper substrate 101. The surface of the upper bonding layer 301 is located between the LED lamp beads 202 and the lamp bead grooves 203 to form a bonding adhesive layer 303.

[0033] Furthermore, a sealing frame 6 is arranged around the substrate layer 1, the rolled copper circuit layer 2 and the bonding layer 3, and a power box 7 is arranged on one side of the sealing frame 6, and a control board 8 is arranged inside the power box 7, and the output end of the control board 8 is electrically connected to the rolled copper circuit board 201 of the rolled copper circuit layer 2, and the input end is electrically connected to the external power supply; the inner diameter of the lamp bead groove 203 is larger than the outer diameter of the LED lamp bead 202, which is equal to the sum of the thickness of the LED lamp bead 202 and the bonding adhesive layer 303, and the depth of the lamp bead groove 203 is less than the thickness of the upper substrate 101 layer 1; the substrate layer 1 is made of PET material, and the thickness is 125-500u m; the LED lamp beads 202 are arranged in patches, and the arrangement of the LED lamp beads 202 is a multi-row and multi-column arrangement. The distance between two adjacent LED lamp beads 202 in the same column is 3-200mm, and the distance between adjacent LED lamp beads 202 in the same row is 3-200mm; the inner diameter length and width of the lamp bead groove 203 are both 1.5-4mm, and the thickness of the inner top wall of the lamp bead groove 203 and the surface of the upper substrate 101 is 0.2-3mm, the rolled copper circuit layer 2 is made of rolled copper material, one side of which is silver-plated or matte black, and the thickness of the rolled copper circuit board 201 of the rolled copper circuit layer 2 is 8-50um.

[0034] By adopting the film etching process to prepare the rolled copper circuit board 201, not only the prepared rolled copper circuit display screen has strong transparency and excellent toughness, but also the stability of the display screen is improved; by opening an impermeable lamp bead groove 203 on the surface of the upper substrate 101 and dispensing glue inside the lamp bead groove 203, no bubbles and atomization effect will be generated, making it more transparent, and further ensuring the flatness of the surface of the rolled copper circuit display screen, it is easy to realize production line type production with high efficiency.

[0035] The present invention also discloses a production process of a rolled copper circuit display screen, comprising the following steps:

[0036] S1: First, the rolled copper sheet with a thickness of 5-50um is pressed together with the substrate layer of high-temperature resistant special PET using double-sided optical adhesive;

[0037] S2: Then the circuit to be etched is transferred to two identical films by photolithography, and then the films are aligned by manual alignment or machine alignment, and then the rolled copper coated with photosensitive ink or affixed with photosensitive dry film is placed in the middle of the films, and exposed after suction to prepare a rolled copper circuit board 201, and then the LED lamp beads 202 are soldered on the surface of the rolled copper circuit board 201 to form a rolled copper circuit layer 2;

[0038] S3: After the rolled copper circuit board 201 is etched by film, the etched area is atomized, and then liquid UV glue is evenly applied on the surface of the entire rolled copper circuit board 201, and the hydraulic UV glue fills the surface of the rolled copper circuit board 201 and the substrate layer 1 to form a lower bonding layer 302, and a pressing groove 5 is formed on the surface of the lower bonding layer 302, and the hydraulic UV glue fills the inside of the pressing groove 5, and then it is left to stand or vacuumed by a vacuum machine, and then ultraviolet light is used for curing to form a pressing protrusion 4, and a rolled copper circuit board 201 with strong permeability and toughness connected to the lower substrate 102 is formed;

[0039] S4: Use a knife die to dig a groove at a position corresponding to the LED lamp bead 202 on the lower surface of the upper substrate 101 to form a lamp bead groove 203, and the inner top wall of the lamp bead groove 203 is not connected to the upper surface of the upper substrate 101, then place the lower surface of the upper lamp groove on the table, use a glue dispenser to dispense glue inside the lamp bead groove 203, and brush PVB glue on the surface, and then dispense glue inside the lamp bead groove 203 again until the UV glue overflows and stops, finally, the lower substrate 102 equipped with the rolled copper circuit layer 2 is pressed together with the upper substrate 101, so that the PVB glue brushed on the surface of the upper substrate 101 forms an upper bonding layer 301, and the UV glue inside the lamp bead groove 203 forms a bonding glue layer 303;

[0040] S5: Cut off the extruded PVB glue, and then seal it on all sides with a sealing frame 6, and then install the power box 7 to one side of the sealing frame 6, so that the control board 8 inside the power box 7 is welded to the rolled copper circuit layer 2, and a rolled copper circuit display screen is prepared.

[0041] Although the present invention 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 substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rolled copper circuit display screen, comprising a substrate layer (1), a rolled copper circuit layer (2) and an adhesive layer (3), characterized in that: The substrate layer (1) comprises an upper substrate (101) and a lower substrate (102); the bonding layer (3) comprises an upper bonding layer and a lower bonding layer (302); the upper substrate (101) is connected to the rolled copper circuit layer via the upper bonding layer (301); and the lower substrate (102) is connected to the rolled copper circuit layer (2) via the lower bonding layer (302); The rolled copper circuit layer (2) comprises a rolled copper circuit board (201), a plurality of LED lamp beads (202) are connected to the surface circuit of the rolled copper circuit board (201), a pressing protrusion (4) is arranged between the bottom of the rolled copper circuit board (201) and the lower bonding layer (302), a pressing groove (5) matching the pressing protrusion (4) is formed on the surface of the lower bonding layer (302), a plurality of lamp bead grooves (203) corresponding to the positions of the LED lamp beads (202) are opened at the bottom of the surface of the upper substrate (101), and a bonding adhesive layer (303) is formed on the surface of the upper bonding layer (301) between the LED lamp beads (202) and the lamp bead grooves (203); The inner diameter of the lamp bead groove (203) is greater than the outer diameter of the LED lamp bead (202), and is equal to the sum of the thicknesses of the LED lamp bead (202) and the bonding adhesive layer (303), and the depth of the lamp bead groove (203) is less than the thickness of the upper substrate (101) layer (1).

2. The rolled copper circuit display screen according to claim 1, characterized in that: A sealing frame (6) is arranged around the substrate layer (1), the rolled copper circuit layer (2) and the adhesive layer (3), and a power box (7) is arranged on one side of the sealing frame (6). A control board (8) is arranged inside the power box (7), and the output end of the control board (8) is electrically connected to the rolled copper circuit board (201) of the rolled copper circuit layer (2), and the input end is electrically connected to an external power source.

3. The rolled copper circuit display screen according to claim 1, characterized in that: The substrate layer (1) is made of PET material and has a thickness of 125-500 um.

4. The rolled copper circuit display screen according to claim 1, characterized in that: The LED lamp beads (202) are arranged in a patch configuration, and the LED lamp beads (202) are arranged in multiple rows and columns, the distance between two adjacent LED lamp beads (202) in the same column is 3-200 mm, and the distance between adjacent LED lamp beads (202) in the same row is 3-200 mm.

5. The rolled copper circuit display screen according to claim 1, characterized in that: The inner diameter length and width of the lamp bead groove (203) are both 1.5-4 mm, and the thickness between the inner top wall of the lamp bead groove (203) and the surface of the upper substrate (101) is 0.2-3 mm.

6. The rolled copper circuit display screen according to claim 1, characterized in that: The rolled copper circuit layer (2) is made of rolled copper material, one side of which is plated with silver or matte black, and the rolled copper circuit board (201) of the rolled copper circuit layer (2) has a thickness of 8-50 um.

7. A production process for a rolled copper circuit display screen using any one of claims 1 to 6, characterized in that: The following steps are involved: S1: First, the rolled copper sheet with a thickness of 5-50um is pressed together with the substrate layer of high-temperature resistant special PET using double-sided optical adhesive; S2: The circuit to be etched is then transferred to two identical films by photolithography, and the films are then aligned by manual alignment or machine alignment, and a rolled copper coated with photosensitive ink or affixed with a photosensitive dry film is placed between the films, and exposed after suction to prepare a rolled copper circuit board (201), and then an LED lamp bead (202) is soldered to the surface of the rolled copper circuit board (201) to form a rolled copper circuit layer (2); S3: After the rolled copper circuit board (201) is etched with film, the etched area is atomized, and then liquid UV glue is evenly applied to the surface of the entire rolled copper circuit board (201). The liquid UV glue fills the surface of the rolled copper circuit board (201) and the substrate layer (1) to form a lower bonding layer (302), and a pressing groove (5) is formed on the surface of the lower bonding layer (302). After the liquid UV glue fills the inside of the pressing groove (5), it is left to stand or a vacuum machine is used to draw a vacuum, and then ultraviolet light is used to cure to form a pressing protrusion (4), and a rolled copper circuit board (201) with strong permeability and toughness connected to the lower substrate (102) is formed; S4: using a die cutter to dig grooves at positions corresponding to the LED lamp beads (202) on the lower surface of the upper substrate (101) to form lamp bead grooves (203), wherein the inner top wall of the lamp bead grooves (203) is not in communication with the upper surface of the upper substrate (101), and then placing the lower surface of the upper lamp groove on a table, using a glue dispenser to dispense glue inside the lamp bead groove (203), and brushing PVB glue on the surface, and then dispensing glue inside the lamp bead groove (203) again until the UV glue overflows, and finally pressing the lower substrate (102) equipped with the rolled copper circuit layer (2) with the upper substrate (101), so that the PVB glue brushed on the surface of the upper substrate (101) forms an upper bonding layer (301), and the UV glue inside the lamp bead groove (203) forms a bonding glue layer (303); S5: Cut off the extruded PVB glue, and then seal the surroundings with a sealing frame (6), and then install the power box (7) and one side of the sealing frame (6), so that the control board (8) inside the power box (7) and the rolled copper circuit layer (2) are welded to prepare a rolled copper circuit display screen.

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