Electrogenerated liquid crystal dimming film electrode and preparation method thereof

Abstract

The invention relates to the technical field of electrogenerated liquid crystal dimming films, in particular to an electrogenerated liquid crystal dimming film electrode and a preparation method thereof.The electrogenerated liquid crystal dimming film electrode comprises an electrogenerated liquid crystal dimming film body and two electrode assemblies, and each electrode assembly comprises a conductive silver paste layer, a double-conductive copper foil adhesive tape, an anisotropic conductive adhesive film and a flexible circuit board conductive layer; the conductive silver paste layer is connected with the electrogenerated liquid crystal dimming film body, the double-conductive copper foil adhesive tape is connected with the conductive silver paste layer, the anisotropic conductive adhesive film is connected with the double-conductive copper foil adhesive tape, and the flexible circuit board conductive layer is connected with the anisotropic conductive adhesive film. After the electrode assembly is manufactured, the external power interface is connected with a power line or a power supply with any length according to other processes to supply power to the electro-liquid crystal dimming film body; according to the invention, the flexible printed circuit (FPC) is adopted to replace a wire, and the flexible printed circuit is integrally formed, so that the defect that the welding spot of the traditional wire is easy to break is overcome.

Description

Technical Field

[0001] The invention relates to the technical field of electro-liquid crystal dimming films, and in particular to an electro-liquid crystal dimming film electrode and a preparation method thereof. Background Art

[0002] Electro-liquid crystal dimming film is widely used in dimming glass, smart insulating glass, automobile windshield dimming glass and other fields. The electrode production in its production process is a key link.

[0003] However, the traditional method of using soldering to weld wires has many shortcomings, such as low reliability, easy breakage, easy damage to the wire insulation layer during high-temperature pressing, causing safety hazards, unsightly, difficult to mass produce, low efficiency, and difficult subsequent maintenance. Summary of the invention

[0004] The purpose of the present invention is to provide an electro-liquid crystal dimming film electrode and a preparation method thereof, which solves the problems of the traditional method of welding wires using tin soldering, such as unsightly appearance, difficulty in mass production, low efficiency and difficulty in subsequent maintenance.

[0005] To achieve the above-mentioned purpose, the present invention provides an electro-liquid crystal dimming film electrode and a preparation method thereof, comprising an electro-liquid crystal dimming film body and two electrode assemblies, wherein the two electrode assemblies are respectively located on both sides of the electro-liquid crystal dimming film body; the electrode assembly comprises a conductive silver paste layer, a double conductive copper foil tape, an anisotropic conductive adhesive film and a conductive layer of a flexible circuit board, wherein the conductive silver paste layer is connected to the electro-liquid crystal dimming film body and is located on one side of the electro-liquid crystal dimming film body, the double conductive copper foil tape is connected to the conductive silver paste layer and is located on one side of the conductive silver paste layer, the anisotropic conductive adhesive film is connected to the double conductive copper foil tape and is located on a side of the double conductive copper foil tape away from the conductive silver paste layer, and the conductive layer of the flexible circuit board is connected to the anisotropic conductive adhesive film and is located on a side of the anisotropic conductive adhesive film away from the double conductive copper foil tape.

[0006] The electro-liquid crystal dimming film body has a positioning notch, and the positioning notch is arranged on a side of the electro-liquid crystal dimming film body close to the electrode assembly.

[0007] Among them, the electro-liquid crystal dimming film includes a liquid crystal layer, two ITO conductive coatings and two plastic substrates, the two ITO conductive coatings are respectively connected to the liquid crystal layer and are located on both sides of the liquid crystal layer, and the two ITO conductive coatings are respectively connected to the two conductive silver paste layers; the two plastic substrates are respectively connected to the two ITO conductive coatings and are located on the side of the ITO conductive coating away from the liquid crystal layer.

[0008] The plastic substrate has a mounting groove, which is arranged on the plastic substrate and penetrates the plastic substrate, and the mounting groove cooperates with the conductive silver paste layer.

[0009] The present invention also includes a method for preparing an electro-liquid crystal dimming film electrode, comprising the following steps:

[0010] One of the four sides of the electro-liquid crystal dimming film body is selected as the electrode processing side, and a positioning notch with a length of 5 mm and a depth of 7 mm is cut in the middle of the processing side;

[0011] Using an electrode knife to cut the mounting grooves on the two plastic substrates, so that the two ITO conductive coatings are exposed as electrode positions, and the electrode positions are wiped with alcohol;

[0012] Brushing the conductive silver paste evenly onto the two ITO conductive coatings respectively, and then drying the conductive silver paste to form the conductive silver paste layer;

[0013] Paste the double conductive copper foil tape on the dry conductive silver paste and use a scraper to smooth it;

[0014] Applying anisotropic conductive adhesive film to the conductive layer of the flexible circuit board;

[0015] The conductive layer of the flexible circuit board with the anisotropic conductive film applied thereon is subjected to high-temperature shaping and pressing on the double conductive copper foil tape using an FPC bonding machine.

[0016] Among them, in “select one of the four sides of the electro-liquid crystal dimming film body as the electrode processing side, and cut a positioning notch with a length of 5 mm and a depth of 7 mm in the middle of the processing side”;

[0017] The two sides of the positioning notch are of equal length.

[0018] Among them, in “the conductive silver paste is evenly brushed onto the two ITO conductive coatings respectively, and then the conductive silver paste is dried to form the conductive silver paste layer”;

[0019] During the drying process, hot air at 80° C. is used to gently blow the conductive silver paste on the ITO conductive coating for about 12-15 minutes.

[0020] Wherein, in “applying the anisotropic conductive adhesive film to the conductive layer of the flexible circuit board”, the method further comprises:

[0021] The anisotropic conductive adhesive film is applied to the conductive layer of the flexible circuit board using a special laminating machine. The pre-laminating temperature of the anisotropic conductive adhesive film is 60-90° C., the pressure is 0.5-1.2 MPa, and the time is 1-2 seconds.

[0022] Among them, in “the conductive layer of the flexible circuit board to which the anisotropic conductive film has been applied is subjected to high-temperature shaping and pressing on the double conductive copper foil tape using an FPC bonding machine”;

[0023] The pressing temperature is 190-220°C, the pressure is 1.5-2.0MPa, and the time is 15-12 seconds.

[0024] The present invention discloses an electro-liquid crystal dimming film electrode and a preparation method thereof, comprising the following steps: selecting one of the four sides of the electro-liquid crystal dimming film body as an electrode processing side, cutting a positioning notch with a length of 5 mm and a depth of 7 mm in the middle of the processing side; using an electrode knife to cut the installation grooves on the two plastic substrates, so that the two ITO conductive coatings are exposed as electrode positions, and using alcohol to wipe the electrode positions; brushing the conductive silver paste evenly onto the two ITO conductive coatings, and then drying the conductive silver paste to form the conductive silver paste layer; ; Paste the double conductive copper foil tape on the dry conductive silver paste and use a scraper to smooth it; apply the anisotropic conductive film to the conductive layer of the flexible circuit board; use an FPC bonding machine to perform high-temperature shaping and pressing on the conductive layer of the flexible circuit board with the anisotropic conductive film to the double conductive copper foil tape; the present invention uses a flexible circuit board (FPC) to replace the wire, and the flexible circuit board (FPC) is integrally formed, which solves the problem that the traditional wire is easy to break at the solder joint; at the same time, the present invention is pressed at a high temperature in the later stage to avoid secondary damage and reduce the risk of damaging the insulating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0026] Figure 1 It is a schematic diagram of the overall structure of the electro-liquid crystal dimming film electrode according to the first embodiment of the present invention.

[0027] Figure 2 Schematic diagram of the structure of the conductive silver paste layer of the first embodiment of the present invention.

[0028] Figure 3 It is a schematic diagram of the installation structure of the ITO conductive coating according to the first embodiment of the present invention.

[0029] Figure 4 It is a flow chart of a method for preparing an electro-liquid crystal dimming film electrode according to a second embodiment of the present invention.

[0030] In the figure: 101-electrochemical liquid crystal dimming film body, 102-electrode assembly, 103-conductive silver paste layer, 104-double conductive copper foil tape, 105-anisotropic conductive adhesive film, 106-flexible circuit board conductive layer, 107-positioning notch, 108-liquid crystal layer, 109-ITO conductive coating, 110-plastic substrate, 111-installation groove. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0032] First embodiment:

[0033] See also Figures 1 to 3 ,in Figure 1 This is a schematic diagram of the overall structure of the electro-liquid crystal dimming film electrode. Figure 2 It is a schematic diagram of the structure of the conductive silver paste layer. Figure 3 It is a schematic diagram of the installation structure of ITO conductive coating.

[0034] The present invention provides an electro-liquid crystal dimming film electrode, comprising an electro-liquid crystal dimming film body 101 and two electrode assemblies 102, wherein the electrode assembly 102 comprises a conductive silver paste layer 103, a double conductive copper foil tape 104, an anisotropic conductive adhesive film 105 and a flexible circuit board conductive layer 106, wherein the electro-liquid crystal dimming film body 101 has a positioning notch 107, and the electro-liquid crystal dimming film comprises a liquid crystal layer 108, two ITO conductive coatings 109 and two plastic substrates 110, wherein the plastic substrate 110 has a mounting groove 111, and the flexible circuit board conductive layer 106 is used to replace the wire, thereby avoiding the problem of easy breakage at the solder joint of the traditional wire and improving the aesthetics.

[0035] According to this specific embodiment, the two electrode assemblies 102 are respectively located on both sides of the electro-liquid crystal dimming film body 101; the conductive silver paste layer 103 is connected to the electro-liquid crystal dimming film body 101 and is located on one side of the electro-liquid crystal dimming film body 101; the double conductive copper foil tape 104 is connected to the conductive silver paste layer 103 and is located on one side of the conductive silver paste layer 103; the anisotropic conductive adhesive film 105 is connected to the double conductive copper foil tape 104 and is located on the side of the double conductive copper foil tape 104 away from the conductive silver paste layer 103; the flexible circuit board conductive layer 106 is connected to the anisotropic conductive adhesive film 105 and is located on the side of the anisotropic conductive adhesive film 105 away from the double conductive copper foil tape 104.

[0036] The conductive silver paste layer 103 is coated on the ITO conductive coating 109 to form a strong film with excellent conductive properties; the double conductive copper foil tape 104 plays a role in further reinforcement and conductivity. The double conductive copper foil tape 104 is tightly attached to the conductive silver paste layer 103, and a reliable connection with the conductive silver paste layer 103 is achieved through the conductive particles inside it; at the same time, the double conductive copper foil tape 104 also has a certain degree of flexibility, which can adapt to the slight deformation of the electro-liquid crystal dimming film body 101 when subjected to external force, thereby ensuring the long-term stability and reliability of the electrode assembly 102. The anisotropic conductive film 105 is used to connect the double conductive copper foil tape 104 and the flexible circuit board conductive layer 106. By controlling the conductive direction of the anisotropic conductive film 105, it can be ensured that the current is transmitted only along a predetermined path, thereby avoiding the occurrence of problems such as short circuit and leakage. The flexible circuit board conductive layer 106, as the outermost layer of the electrode assembly 102, not only has excellent conductive properties, but also has good flexibility and bendability, which enables the flexible circuit board conductive layer 106 to adapt to various complex installation environments and space limitations, and provides more possibilities for the application of electro-liquid crystal dimming films.

[0037] The positioning notch 107 is disposed on a side of the electro-liquid crystal dimming film body 101 close to the electrode assembly 102 ; the positioning notch 107 ensures accurate installation and positioning of the electrode assembly 102 .

[0038] Secondly, the two ITO conductive coatings 109 are respectively connected to the liquid crystal layer 108 and are located on both sides of the liquid crystal layer 108, and the two ITO conductive coatings 109 are respectively connected to the two conductive silver paste layers 103; the two plastic substrates 110 are respectively connected to the two ITO conductive coatings 109 and are located on the side of the ITO conductive coatings 109 away from the liquid crystal layer 108.

[0039] Meanwhile, the plastic substrate 110 has a mounting groove 111 , which is disposed on the plastic substrate 110 and penetrates the plastic substrate 110 , and the mounting groove 111 cooperates with the conductive silver paste layer 103 .

[0040] The two plastic substrates 110 serve as the supporting structure of the electro-liquid crystal dimming film body 101, which not only provides the necessary mechanical strength, but also protects the internal liquid crystal layer 108 and the ITO conductive coating 109 from damage by the external environment; the mounting groove 111 on the plastic substrate 110 corresponds to the position and shape of the electrode assembly 102, and provides guidance and positioning for the installation of the electrode assembly 102. Through the mounting groove 111, the electrode assembly 102 can be firmly attached to the ITO conductive coating 109, avoiding the misalignment and looseness problems that may occur in traditional installation methods.

[0041] Second embodiment:

[0042] See also Figure 4 , Figure 4 is a flow chart of a method for preparing an electro-liquid crystal dimming film electrode according to a second embodiment of the present invention;

[0043] The present invention also includes a method for preparing an electro-liquid crystal dimming film electrode, comprising the following steps:

[0044] S101: Select one of the four sides of the electro-liquid crystal dimming film body 101 as the electrode processing side, and cut a positioning notch 107 with a length of 5 mm and a depth of 7 mm in the middle of the processing side;

[0045] S102: using an electrode knife to cut the mounting grooves 111 on the two plastic substrates 110, so that the two ITO conductive coatings 109 are exposed as electrode positions, and the electrode positions are wiped with alcohol;

[0046] S103: brushing the conductive silver paste evenly onto the two ITO conductive coatings 109 respectively, and then drying the conductive silver paste to form the conductive silver paste layer 103;

[0047] S104: Paste the double conductive copper foil tape 104 on the dry conductive silver paste and use a scraper to smooth it;

[0048] S105: applying the anisotropic conductive adhesive film 105 to the conductive layer 106 of the flexible circuit board;

[0049] S106: The conductive layer 106 of the flexible circuit board to which the anisotropic conductive film 105 has been applied is subjected to high-temperature shaping and pressing by using an FPC bonding machine to bond the conductive layer 106 to the double conductive copper foil tape 104 .

[0050] Specifically, in “selecting one of the four sides of the electro-liquid crystal dimming film body 101 as the electrode processing side, and cutting a positioning notch 107 with a length of 5 mm and a depth of 7 mm in the middle of the processing side”;

[0051] The two sides of the positioning notch 107 are of equal length.

[0052] Specifically, in “the conductive silver paste is evenly brushed onto the two ITO conductive coatings 109 , and then the conductive silver paste is dried to form the conductive silver paste layer 103 ”;

[0053] During the drying process, hot air at 80° C. is used to gently blow the conductive silver paste on the ITO conductive coating 109 for about 12-15 minutes.

[0054] Specifically, in “applying the anisotropic conductive adhesive film 105 to the conductive layer 106 of the flexible circuit board”, the method further includes:

[0055] The anisotropic conductive adhesive film 105 is applied to the conductive layer 106 of the flexible circuit board using a special laminating machine. The pre-laminating temperature of the anisotropic conductive adhesive film 105 is 60-90° C., the pressure is 0.5-1.2 MPa, and the time is 1-2 seconds.

[0056] Specifically, in “using an FPC bonding machine to perform high temperature shaping and pressing of the conductive layer 106 of the flexible circuit board to which the anisotropic conductive film 105 has been applied onto the double conductive copper foil tape 104”;

[0057] The pressing temperature is 190-220°C, the pressure is 1.5-2.0MPa, and the time is 15-12 seconds.

[0058] According to this specific embodiment, one of the four sides of the electro-liquid crystal dimming film body 101 is selected as the electrode processing side, and a positioning notch 107 with a length of 5mm and a depth of 7mm is cut in the middle of the processing side, and the left and right sides of the positioning notch 107 are equal in length; an electrode knife is used to cut off the plastic substrate 110 on both sides of the electro-liquid crystal dimming film body 101 to remove the mounting groove 111 with a length of the full length of a single side and a depth of about 7mm, and the two mounting grooves 111 are respectively located on the left and right sides of the positioning notch 107, and the two mounting grooves 111 serve as the electrode positions of the electro-liquid crystal dimming film body 101; a nylon cloth dipped in 95% alcohol is used to wipe the cut electrode positions to expose the ITO conductive coatings 109 on both sides; the conductive silver paste is evenly brushed onto the two ITO conductive coatings 109, and the ITO conductive coatings 109 are lightly coated with 80°C hot air. The conductive silver paste on the coating 109 is dried for about 12-15 minutes to make it completely dry; the double conductive copper foil tape 104 with a width of 4 mm is pasted on the dried conductive silver paste layer 103, and is flattened and firmly pasted using a scraper; a special laminating machine is used to apply the anisotropic conductive film 105 to the conductive layer 106 of the flexible circuit board, and the pre-laminating temperature of the anisotropic conductive film 105 is 60-90°C, the pressure is 0.5-1.2MPa, and the time is 1-2 seconds; the flexible circuit board with the anisotropic conductive film 105 is subjected to high-temperature shaping and pressing using an FPC bonding machine to the double conductive copper foil tape 104 that has been firmly pasted near the positioning notch 107, and the pressing temperature of the anisotropic conductive film 105 is 190-220°C, the pressure is 1.5-2.0MPa, and the time is 15-12 seconds, thereby completing the preparation of the electro-liquid crystal dimming film electrode.

[0059] The electro-liquid crystal dimming film electrode and the preparation method thereof of the present invention have the following beneficial effects:

[0060] 1. The present invention adopts a flexible circuit board (FPC) to replace the wire. The flexible circuit board (FPC) is integrally formed, which solves the problem that the traditional wire solder joint is easy to break;

[0061] 2. The present invention avoids secondary damage during high-temperature pressing in the later stage and reduces the risk of damaging the insulation layer.

[0062] 3. The present invention uses special equipment for installation, is easy to mass produce, and is beneficial to product quality control

[0063] 4. Based on the above three points, the defective rate is reduced, the production efficiency is improved, the product can be mass-produced, the production cost is reduced, and the market core competitiveness of electro-liquid crystal dimming products is greatly improved.

[0064] The present invention solves the problem of easy breakage and low reliability of traditional wires; at the same time, through high-temperature pressing in the later stage, it avoids the problem of easy damage to the insulation layer during the processing process and reduced insulation effect; and overcomes the problem of low mass production efficiency.

[0065] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An electro-liquid crystal dimming film electrode, characterized in that: It comprises an electro-liquid crystal dimming film body and two electrode assemblies, wherein the two electrode assemblies are respectively located on two sides of the electro-liquid crystal dimming film body; The electrode assembly includes a conductive silver paste layer, a double conductive copper foil tape, an anisotropic conductive adhesive film and a conductive layer of a flexible circuit board. The conductive silver paste layer is connected to the electro-liquid crystal dimming film body and is located on one side of the electro-liquid crystal dimming film body. The double conductive copper foil tape is connected to the conductive silver paste layer and is located on one side of the conductive silver paste layer. The anisotropic conductive adhesive film is connected to the double conductive copper foil tape and is located on a side of the double conductive copper foil tape away from the conductive silver paste layer. The conductive layer of the flexible circuit board is connected to the anisotropic conductive adhesive film and is located on a side of the anisotropic conductive adhesive film away from the double conductive copper foil tape.

2. The electro-liquid crystal dimming film electrode according to claim 1, characterized in that: The electro-liquid crystal dimming film body has a positioning notch, and the positioning notch is arranged on a side of the electro-liquid crystal dimming film body close to the electrode assembly.

3. The electro-liquid crystal dimming film electrode according to claim 2, characterized in that: The electro-liquid crystal dimming film comprises a liquid crystal layer, two ITO conductive coatings and two plastic substrates, the two ITO conductive coatings are respectively connected to the liquid crystal layer and are located on both sides of the liquid crystal layer, and the two ITO conductive coatings are respectively connected to the two conductive silver paste layers; The two plastic substrates are respectively connected to the two ITO conductive coatings and are located on a side of the ITO conductive coating away from the liquid crystal layer.

4. The electro-liquid crystal dimming film electrode according to claim 3, characterized in that: The plastic substrate has a mounting groove, which is arranged on the plastic substrate and penetrates the plastic substrate, and the mounting groove cooperates with the conductive silver paste layer.

5. A method for preparing an electro-liquid crystal dimming film electrode, used for preparing the electro-liquid crystal dimming film electrode as claimed in claim 4, characterized in that: The steps include: One of the four sides of the electro-liquid crystal dimming film body is selected as the electrode processing side, and a positioning notch with a length of 5 mm and a depth of 7 mm is cut in the middle of the processing side; Using an electrode knife to cut the mounting grooves on the two plastic substrates, so that the two ITO conductive coatings are exposed as electrode positions, and the electrode positions are wiped with alcohol; Brushing the conductive silver paste evenly onto the two ITO conductive coatings respectively, and then drying the conductive silver paste to form the conductive silver paste layer; Paste the double conductive copper foil tape on the dry conductive silver paste and use a scraper to smooth it; Applying anisotropic conductive adhesive film to the conductive layer of the flexible circuit board; The conductive layer of the flexible circuit board with the anisotropic conductive film applied thereon is subjected to high-temperature shaping and pressing on the double conductive copper foil tape using an FPC bonding machine.

6. The method for preparing the electro-liquid crystal dimming film electrode according to claim 5, characterized in that: In "selecting one of the four sides of the electro-liquid crystal dimming film body as the electrode processing side, and cutting a positioning notch with a length of 5 mm and a depth of 7 mm in the middle of the processing side"; The two sides of the positioning notch are of equal length.

7. The method for preparing the electro-liquid crystal dimming film electrode according to claim 5, characterized in that: In "brushing the conductive silver paste evenly onto the two ITO conductive coatings respectively, and then drying the conductive silver paste to form the conductive silver paste layer"; During the drying process, hot air at 80° C. is used to gently blow the conductive silver paste on the ITO conductive coating for about 12-15 minutes.

8. The method for preparing the electro-liquid crystal dimming film electrode according to claim 5, characterized in that: In "applying anisotropic conductive adhesive film to the conductive layer of the flexible circuit board", the method further includes: The anisotropic conductive adhesive film is applied to the conductive layer of the flexible circuit board using a special laminating machine. The pre-laminating temperature of the anisotropic conductive adhesive film is 60-90° C., the pressure is 0.5-1.2 MPa, and the time is 1-2 seconds.

9. The method for preparing the electro-liquid crystal dimming film electrode according to claim 5, characterized in that: In "using an FPC bonding machine to perform high temperature shaping and pressing of the conductive layer of the flexible circuit board to which the anisotropic conductive film has been applied onto the double conductive copper foil tape"; The pressing temperature is 190-220°C, the pressure is 1.5-2.0MPa, and the time is 15-12 seconds.

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