CN111403373A - A flexible transparent display module and its manufacturing method - Google Patents

Abstract

The invention provides a flexible transparent display module, which comprises a flexible substrate, and a lamp bead, a first transparent adhesive layer, a second transparent adhesive layer, a first PET film and a second PET film which are arranged on the first surface of the flexible substrate; the first surface of the flexible substrate is provided with a first conductive circuit, the second surface of the flexible substrate is provided with a second conductive circuit and a flexible circuit board, and the second conductive circuit is connected with an external control module through the flexible circuit board and used for controlling the flexible transparent display module to display patterns. The invention also provides a flexible transparent display screen which is formed by combining the flexible transparent display module. The flexible transparent display module is simple in structure, flexible, bendable and convenient to replace, carry and install, and the double-layer PET film is arranged on the flexible transparent display module, so that the flexible transparent display module can be quickly separated from a glass plate in the manufacturing process, and the production efficiency is greatly improved.

Description

A flexible transparent display module and its manufacturing method

technical field

The invention relates to the technical field of transparent display screens, in particular to a flexible transparent display module and a manufacturing method thereof.

Background technique

At present, various advertising display boards are more and more widely used in our lives, among which LED display billboards are used more and more. The LED display is composed of an array of light-emitting diodes. Image display is realized by controlling the color of each light-emitting diode. It can be used to display various information such as text, graphics, images, and videos.

Common LED display screens on the market usually use hard materials such as conductive glass and acrylic plate as the base material of LED display screens. It is difficult to meet the changes in market requirements.

SUMMARY OF THE INVENTION

In view of the above-mentioned technical problems, the present invention provides a flexible transparent display module and a manufacturing method thereof. The flexible transparent display module provided by the present invention has the advantages of softness and bendability, light weight, transparency, convenient installation and the like.

A first aspect of the present invention provides a flexible transparent display module, comprising a flexible substrate and a plurality of lamp beads for displaying patterns disposed on a first surface of the flexible substrate, the flexible substrate having an opposite first surface and The second surface, the lamp beads are covered with a first transparent adhesive layer; the second surface of the flexible substrate is provided with a second transparent adhesive layer; the first surface of the first transparent adhesive layer is provided with a first transparent adhesive layer a PET film; a second PET film is arranged on the second surface of the second transparent adhesive layer; a first conductive circuit electrically connected to the lamp beads is arranged on the first surface of the flexible substrate, and the flexible substrate A second conductive circuit electrically connected to the first conductive circuit is provided on the second surface of the flexible substrate; a flexible circuit board is also provided on the second surface of the flexible substrate, and the second conductive circuit passes through the flexible circuit board It is connected with an external control module for controlling the display pattern of the flexible transparent display module.

Further, the flexible transparent display module includes a display area and a peripheral area, the first conductive circuit is disposed in the display area, the second conductive circuit and the flexible circuit board are disposed in the peripheral area and at least one conductive through hole is also formed in the peripheral region, and the first conductive line is electrically connected with the second conductive line through the first conductive hole.

Preferably, the number of the conductive through holes is one or two.

Further, a conductive material is disposed inside the conductive through hole, so as to conduct electricity between the first conductive line and the second conductive line.

Further, the conductive material is a metal conductive material or a transparent conductive material, wherein preferably a metal conductive material.

Preferably, the metal conductive material is copper, silver, nano-silver, etc., and the transparent conductive material is indium tin oxide (ITO) or fluorine-doped tin oxide (FTO), and the like.

Further, the first conductive line and the second conductive line are metal conductive materials or transparent conductive materials, and preferably metal conductive materials.

Further, the lamp beads are provided with pins, and the pins are connected to the first conductive lines.

Further, the first transparent adhesive layer is used for bonding the first PET film and the flexible substrate.

Further, the second transparent adhesive layer is used for bonding the flexible substrate and the second PET film.

Further, the LED lamp beads are single-color lamp beads, three-color lamp beads or four-color lamp beads.

Further, the thickness of the first transparent adhesive layer is 0.3-1.0 mm higher than the height of the LED lamp bead.

Further, the first PET film and the second PET film are double-layer composite or three-layer composite, and the thickness of the double-layer composite is 0.09-0.11 mm, preferably 0.10 mm; the thickness of the three-layer composite is 0.12 to 0.14 mm, preferably 0.12 mm.

Further, the first transparent adhesive layer and the second transparent adhesive layer are one of PVB transparent adhesive layer, EVA transparent adhesive layer and SGP transparent adhesive layer.

A second aspect of the present invention provides a method for manufacturing a flexible transparent display module, comprising the following steps:

A. Preparation of the light-emitting layer, the first PET film, the second PET film, the first transparent adhesive layer, the second transparent adhesive layer, the first glass plate, and the second glass plate;

B. The prepared second PET film is placed on the second glass plate, and then the second transparent adhesive layer is covered;

C. place the prepared light-emitting layer on the second transparent adhesive layer, and then cover the first transparent adhesive layer;

D. Spread the first PET film on the first transparent adhesive layer, and then place the first glass plate;

E. Combine the first glass plate and the second glass plate, put them into a vacuum press for vacuum pressing;

F. After the lamination is completed, separate the first glass plate and the second glass plate from the first PET film and the second PET film respectively, and complete the packaging to form the flexible transparent display module.

Further, the preparing the light-emitting layer includes: taking a flexible substrate, arranging lamp beads and a first conductive circuit on the first surface of the flexible substrate, and arranging a second wire circuit on the second surface of the flexible substrate; The first end of the first conductive line is electrically connected to the lamp beads on the flexible substrate, and the second end of the first conductive line is connected to the first end of the second conductive line through a conductive through hole; The second ends of the two conductive lines are electrically connected to the flexible circuit board to form the light-emitting layer.

Further, the preparation of the first PET film, the second PET film, the first transparent adhesive layer and the second transparent adhesive layer is performed by an automatic cutting machine and cutting according to the required size.

Further, the thickness of the first transparent adhesive layer is 0.3-1.0 mm higher than the height of the lamp bead.

Further, the pressing temperature is 65-110° C., the pressing time is 1-3 hours, and the pressing pressure is 350-1000 kpa.

Further, the first transparent adhesive layer and the second transparent adhesive layer are one of PVB transparent adhesive layer, EVA transparent adhesive layer and SGP transparent adhesive layer.

The present invention also provides a flexible transparent display screen, comprising a plurality of the flexible transparent display modules, and the flexible transparent display modules are connected by a connection structure to form the flexible transparent display screen.

The beneficial effects of the present invention are: the flexible transparent display module of the present invention has a simple structure, is soft and bendable, and is convenient for replacement, handling and installation, and by arranging a double-layer PET film on the flexible transparent display module, it is possible to realize the realization in the production process. The effect of rapid separation from the glass plate greatly improves the production efficiency.

Description of drawings

FIG. 1 is a schematic structural diagram of a flexible transparent display module provided by the present invention.

FIG. 2 is a schematic structural diagram of a first embodiment of a light-emitting layer in a flexible transparent display module provided by the present invention.

3 is a schematic structural diagram of a second embodiment of a light-emitting layer in a flexible transparent display module provided by the present invention.

FIG. 4 is a flowchart of a manufacturing method of a flexible transparent display module provided by the present invention.

FIG. 5 is a schematic structural diagram of the flexible transparent display screen provided by the present invention.

Symbol Description:

1 The first PET film

2 first transparent adhesive layer

3 light-emitting layers

31 Flexible substrate

32 lamp beads

321 LED pin

4 Second transparent adhesive layer

5 Second PET film

6 The first conductive line

7 Second conductive line

8 conductive vias

9 Flexible circuit board

10 Reinforcement

11 Connection structure

100 flexible transparent display module

300 flexible transparent display

A1 display area

A2 Surrounding Area

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts are all within the scope of The scope of protection of the present invention. In addition, all the coupling/connection relationships involved in the patent do not mean that the components are directly connected, but refer to a better coupling structure by adding or reducing coupling accessories according to the specific implementation. Various technical features in the present invention can be combined interactively on the premise of not contradicting each other.

The present invention provides a flexible transparent display module. Please refer to FIG. 1 . FIG. 1 shows a schematic structural diagram of a flexible transparent display module provided by the present invention. The flexible transparent display module 100 provided by the present invention includes a light-emitting layer 3 . One side of the light-emitting layer 3 is provided with a first transparent adhesive layer 2 , and the other side of the light-emitting layer 3 is provided with a second transparent adhesive layer 4 . The first PET film 1 is disposed on the first surface of the first transparent adhesive layer 2 ; the second PET film 5 is disposed on the second surface of the second transparent adhesive layer 4 .

FIG. 2 shows a schematic structural diagram of the first embodiment of the light-emitting layer 3 in FIG. 1 . According to this embodiment, the light emitting layer 3 includes a flexible substrate 31 , lamp beads 32 , a first conductive circuit 6 , a second conductive circuit 7 , a conductive through hole 8 and a flexible circuit board 9 .

In this embodiment, the flexible transparent display module 100 includes a flexible substrate 31 and lamp beads 32 arranged in an array on the first surface of the flexible substrate 31 ; the lamp beads 32 are covered with a first transparent adhesive layer 2 ; the flexible substrate 31 A second transparent adhesive layer 4 is arranged on the second surface of the first transparent adhesive layer 2; a first PET film 1 is arranged on the first surface of the first transparent adhesive layer 2; 5; the first surface of the flexible substrate 31 is provided with a first conductive circuit 6 that is electrically connected to the lamp bead pins 321, and the second surface of the flexible substrate 31 is provided with a second conductive circuit that is electrically connected to the first conductive circuit 6 7; a flexible circuit board 9 is also provided on the second surface of the flexible substrate 31, and the second conductive circuit 7 is connected to an external control module (not shown in the figure) through the flexible circuit board 9 to control the flexible transparent display module Display the pattern.

The flexible transparent display module provided by the present invention includes a display area A1 and a peripheral area A2. The first conductive circuit 6 is arranged in the display area A1, and the second conductive circuit 7 and the flexible circuit board 9 are arranged in the peripheral area A2. A conductive circuit 6 is communicated with the second conductive circuit 7, and a conductive through hole 8 is provided on the peripheral area A2 of the flexible transparent display module, and the number of the conductive through holes 8 is not limited to this; There is a conductive material for electrically connecting the first conductive line 6 and the second conductive line 7 . In this embodiment, the conductive material is made of a metal conductive material, such as copper, silver, nano-silver, and the like.

In this embodiment, the first transparent adhesive layer 2 and the second transparent adhesive layer 4 are both PVB transparent adhesive layers, and may also be EVA transparent adhesive layers or SGP transparent adhesive layers; the first transparent adhesive layer 2 is used for bonding the first transparent adhesive layer. A PET film 1 and a flexible substrate 31, a second transparent adhesive layer 4 is used to bond the flexible substrate 31 and the second PET film 5; at the same time, the thickness of the first transparent adhesive layer 2 is 0.3-1.0 mm higher than the height of the lamp beads 32, preferably When the thickness is 0.5 mm, it can not only protect the flexible substrate 31 from damage, but also obtain a better display effect.

In this embodiment, the lamp beads 32 can be single-color lamp beads, three-color lamp beads or four-color lamp beads, and can be packaged in a chip type; the first conductive line 6 and the second conductive line 7 are made of metal conductive materials , such as copper, silver, nano-silver, etc., the first conductive line 6 and the second conductive line 7 are in a honeycomb structure or a tree root structure, but not limited to this; the first PET film 1 and the second PET film The film 5 is double-layered and has a thickness of 0.09-0.11 mm, preferably 0.10 mm.

Please refer to FIG. 3 , which shows a schematic structural diagram of a second embodiment of the light emitting layer 3 in FIG. 1 . According to this embodiment, the light-emitting layer 3 includes a flexible substrate 31 , lamp beads 32 , a first conductive circuit 6 , a second conductive circuit 7 , a conductive through hole 8 , a flexible circuit board 9 and a reinforcement portion 10 .

In this embodiment, the flexible transparent display module includes a flexible substrate 31 and lamp beads 32 arranged on the first surface of the flexible substrate 31 , the lamp beads 32 are covered with a first transparent adhesive layer 2 ; A second transparent adhesive layer 4 is arranged on the two surfaces; a first PET film 1 is arranged on the first surface of the first transparent adhesive layer 2; a second PET film 5 is arranged on the second surface of the second transparent adhesive layer 4; The first surface of the flexible substrate 31 is provided with a first conductive circuit 6 that is electrically connected to the lamp bead pins 321, and the second surface of the flexible substrate 31 is provided with a second conductive circuit 7 that is electrically connected to the first conductive circuit 6; A flexible circuit board 9 is also provided on the second surface of the flexible substrate 31, and the second conductive circuit 7 is connected to an external control module (not shown in the figure) through the flexible circuit board 9, so as to control the display pattern of the flexible transparent display module. .

The flexible transparent display module includes a display area A1 and a peripheral area A2. The first conductive circuit 6 is arranged in the display area A1, and the second conductive circuit 7 and the flexible circuit board are arranged in the peripheral area A2. In order to realize the first conductive circuit 6 In connection with the second conductive circuit 7, a conductive through hole 8 is provided on the peripheral area A2 of the flexible transparent display module. The number of the conductive through hole 8 is not limited to this. In this embodiment, the conductive material is made of a transparent conductive material, such as indium tin oxide (ITO) or fluorine-doped tin oxide (FTO), for conducting electricity between the first conductive line 6 and the second conductive line 7 .

In this embodiment, a reinforcing portion 10 is respectively provided at the connection between the first conductive line 6 and the conductive material of the conductive through hole 8 and the connection between the second conductive line 7 and the conductive material of the conductive through hole 8 to increase the The stability of the connection between the first conductive line 6 and the conductive through hole 8 and the stability of the connection between the second conductive line 7 and the conductive through hole 8 are used to prevent the problem of circuit failure caused by disconnection. In this embodiment, the thickness of the reinforcing portion 10 is greater than the thickness of the conductive material of the first conductive line 6 , the second conductive line 7 and the conductive through hole 8 , and the structure of the reinforcing portion 10 can avoid circuit breakage at the connection. unreasonable problem. In this embodiment, the shape of the reinforcing portion 10 is set to be a square structure, and may also be other shapes such as a circular chamfered structure, a trapezoidal structure, etc., which is not limited thereto. The shape of the conductive through hole 8 may also be a cylindrical shape, a rectangular parallelepiped, a cube, etc., which is not limited thereto.

In this embodiment, the first transparent adhesive layer 2 and the second transparent adhesive layer 4 are both EVA transparent adhesive layers, and may also be PVB transparent adhesive layers or SGP transparent adhesive layers; the first transparent adhesive layer 2 is used for bonding the first transparent adhesive layer. A PET film 1 and a flexible substrate 31, the second transparent adhesive layer 4 is used to bond the flexible substrate 31 and the second PET film 5; at the same time, the thickness of the first transparent adhesive layer 2 is 0.3-1.0 mm higher than the height of the lamp beads 32, not only The function of protecting the flexible substrate 31 from damage can be achieved, and a better display effect can be obtained.

In this embodiment, the lamp beads 32 can be single-color lamp beads, three-color lamp beads or four-color lamp beads, and can be packaged in a patch type package; the first conductive line 6 and the second conductive line 7 are made of transparent conductive materials. Such as indium tin oxide ITO or fluorine doped tin oxide (FTO), the first conductive circuit 6 and the second conductive circuit 7 are in a honeycomb structure or a tree root structure, but not limited to this; A PET film 1 and a second PET film 5 are composited in three layers, and the thickness is 0.12-0.14 mm, preferably 0.12 mm.

In the above embodiments provided by the present invention, the first conductive line 6 and the second conductive line 7 are made of metal conductive material or transparent conductive material, and may also be made of graphene material, but not limited thereto.

The flexible transparent display module of the present invention has a simple structure, is soft and bendable, and is convenient for replacement, transportation and installation, and by arranging a double-layer PET film on the flexible transparent display module, the flexible transparent display module can be quickly separated from the glass plate during the production process. effect, greatly improving production efficiency. Moreover, when using the flexible transparent display module 100 provided by the present invention, it is only necessary to tear the first PET film 1, and then directly attach the first transparent adhesive layer 2 of the flexible transparent display module 100 to the desired application The scene is enough, the installation is simple and convenient, and it is suitable for various application scenarios, such as glass curtain wall, elevator car, sky curtain, etc.

As shown in FIG. 4 , the present invention further provides a manufacturing method of the flexible transparent display module 100 for preparing the flexible transparent display module provided by the present invention. Combined with the structure of the flexible transparent display module 100 provided by the present invention, the present invention The method provided by the invention comprises the following steps:

A. Preparation of the light-emitting layer 3, the first PET film 1, the second PET film 5, the first transparent adhesive layer 2, the second transparent adhesive layer 4, the first glass plate, and the second glass plate;

The steps of preparing the light-emitting layer 3 include: taking the flexible substrate 31 , installing the lamp beads 32 on the first surface of the flexible substrate 31 through solder paste and arranging the first conductive circuit 6 , and arranging the first conductive circuit 6 on the second surface of the flexible substrate 31 . Two conductive lines 7 ; the first end of the first conductive line 6 is electrically connected to the lamp bead pins 321 on the flexible substrate 31 , and the second end of the first conductive line 6 is connected to the The first end of the second conductive circuit 7; and the second end of the second conductive circuit 7 is connected with the flexible circuit board 9 by a binding machine to form the light-emitting layer.

The preparation of the first PET film 1 , the second PET film 5 , the first transparent adhesive layer 2 , and the second transparent adhesive layer 4 is performed by an automatic cutting machine according to the required size.

B. The prepared second PET film 5 is placed on the second glass plate, and then the second transparent adhesive layer 4 is covered;

C. Place the flexible substrate 31 on the second transparent adhesive layer 4, and then cover the first transparent adhesive layer 2. The first transparent adhesive layer 2 is filled between the lamp beads 32, and the thickness of the first transparent adhesive layer 2 is high. The height of the lamp beads 32 is 0.3-1.0 mm to protect the flexible substrate 31 from damage;

D. Spread the first PET film 1 on the first transparent adhesive layer 2, and then place the first glass plate;

E. Combine the first glass plate and the second glass plate, put them into a vacuum press for vacuum pressing, the pressing temperature is 65～110℃, the pressing time is 1～3h, and the pressing pressure is 350 ~1000kpa;

F. After the lamination is completed, separate the first glass plate and the second glass plate from the first PET film 1 and the second PET film 5 respectively, and complete the packaging to form the transparent display module provided by the present invention.

By disposing the first PET film 1 and the second PET film 5 on the upper and lower surfaces of the flexible display module 100 respectively, the effect of rapid separation from the first glass plate and the second glass plate can be achieved during the production process, which greatly improves the Productivity.

The flexible transparent display module 100 is formed by trimming the excess adhesive layer around the flexible substrate 31 according to the size of the flexible substrate 31 . The first transparent adhesive layer 2 and the second transparent adhesive layer 4 are one of PVB transparent adhesive layer, EVA transparent adhesive layer and SGP transparent adhesive layer.

Referring to FIG. 5 , the present invention further provides a flexible transparent display screen 300 . The flexible transparent display screen 300 of the present invention includes several flexible transparent display modules 100 provided by the present invention. The flexible transparent display modules 100 are connected together through the connection structure 11 to form a flexible transparent display screen 300 . When the flexible transparent display module 100 is spliced, it can be packaged in a sub-frame according to product requirements to meet product appearance requirements. In this implementation, the number of flexible transparent display modules 100 is four. In other embodiments, the number of flexible transparent display modules 100 can be arbitrarily set according to actual needs.

The flexible transparent display screen 300 of the present invention is formed by splicing the flexible transparent display module 100 of the present invention, and has a simple structure, convenient assembly, maintenance and replacement, is suitable for the needs of display screens of various shapes, and is conducive to realizing large-size display screens. Wide range of application scenarios.

The above embodiments are only used to illustrate the principles and effects of the present invention, but not to limit the present invention. Anyone skilled in the art can make modifications to the above embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be as listed in the claims.

Claims (10)

1. A flexible transparent display module, comprising a flexible substrate and lamp beads disposed on a first surface of the flexible substrate, wherein the lamp beads are covered with a first transparent adhesive layer; A second transparent adhesive layer is arranged on the two surfaces; a first PET film is arranged on the first surface of the first transparent adhesive layer; a second PET film is arranged on the second surface of the second transparent adhesive layer; A first conductive circuit electrically connected to the lamp beads is provided on the first surface of the flexible substrate, and a second conductive circuit electrically connected to the first conductive circuit is provided on the second surface of the flexible substrate; A flexible circuit board is also arranged on the second surface of the flexible substrate, and the second conductive circuit is connected to an external control module through the flexible circuit board, so as to control the display pattern of the flexible transparent display module. 2 . The flexible transparent display module according to claim 1 , wherein the flexible transparent display module comprises a display area and a peripheral area, and the first conductive circuit is arranged in the display area, 3 . The second conductive circuit and the flexible circuit board are disposed in the peripheral area, and at least one conductive through hole is also formed in the peripheral area, and the first conductive circuit is connected to the second conductive through the conductive through hole. Line electrical connection. 3 . The flexible transparent display module according to claim 2 , wherein a conductive material is provided inside the conductive through hole. 4 . 4 . The flexible transparent display module according to claim 1 , wherein the first conductive circuit and the second conductive circuit are made of metal conductive material or transparent conductive material. 5 . 5. A flexible transparent display module according to claim 1, wherein the first transparent adhesive layer and the second transparent adhesive layer are PVB transparent adhesive layer, EVA transparent adhesive layer and SGP transparent adhesive one of the layers. 6. A method for making a flexible transparent display module, comprising the following steps: A. Preparation of the light-emitting layer, the first PET film, the second PET film, the first transparent adhesive layer, the second transparent adhesive layer, the first glass plate, and the second glass plate; B. The prepared second PET film is placed on the second glass plate, and then the second transparent adhesive layer is covered; C. place the prepared light-emitting layer on the second transparent adhesive layer, and then cover the first transparent adhesive layer; D. Spread the first PET film on the first transparent adhesive layer, and then place the first glass plate; E. Combine the first glass plate and the second glass plate, put them into a vacuum press for vacuum pressing; F. After the lamination is completed, separate the first glass plate and the second glass plate from the first PET film and the second PET film respectively, and complete the packaging to form the flexible transparent display module. 7. The manufacturing method according to claim 6, wherein the preparing the light-emitting layer in the step A comprises: A1: Take a flexible substrate, install lamp beads and arrange a first conductive circuit on the first surface of the flexible substrate, and arrange a second conductive circuit on the second surface of the flexible substrate; A2: Electrically connect the first end of the first conductive line to the lamp bead on the flexible substrate, and connect the second end of the first conductive line to the first end of the second conductive line through conductive vias ; A3: The second end of the second conductive line is electrically connected to the flexible circuit board to form the light-emitting layer. 8 . The manufacturing method according to claim 6 , wherein the first conductive line and the second conductive line are metal conductive materials or transparent conductive materials. 9 . 9 . The manufacturing method according to claim 6 , wherein the pressing temperature is 65-110° C., the pressing time is 1-3 hours, and the pressing pressure is 350-1000 kpa. 10 . 10. A flexible transparent display screen, characterized in that the flexible transparent display screen comprises several flexible transparent display modules, and the flexible transparent display module is the flexible transparent display module according to any one of claims 1 to 5. Or the flexible transparent display module obtained by the manufacturing method according to any one of claims 6 to 9, wherein the flexible transparent display screen is constituted by the plurality of flexible transparent display modules through a connection structure.

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