Large size light control film and method of manufacturing the same

Abstract

The application relates to the technical field of light-adjusting films, in particular to a large-size light-adjusting film and a manufacturing method thereof, which comprises an upper electrode and a lower electrode, an ITO layer one is arranged on the lower electrode, an ITO layer two is arranged on the upper electrode, a light-adjusting unit one is arranged between the ITO layer one and the ITO layer two, the light-adjusting unit one comprises a color liquid crystal layer one and outer ring wires arranged on both sides of the color liquid crystal layer one, electrode wires one are arranged on the outer ring wires, silver paste with ultra-low impedance is used as a conductor, the line voltage loss is reduced, the voltage of the whole electrode surface can reach the expected requirement instantaneously, the large-size light-adjusting film is divided into multiple small-size light-adjusting films by arranging a separation layer, the voltage loss is reduced, the color change consistency of the large-size light-adjusting film is improved, and the light-adjusting film can be converted between multiple colors by arranging double-layer color liquid crystal layers.

Description

A large-size dimming film and its manufacturing method Technical Field

[0001] This invention relates to the field of dimming film technology, specifically to a large-size dimming film and its manufacturing method. Background Technology

[0002] Dimming film is a functional thin film material based on PDLC (polymer dispersed liquid crystal) technology. It can switch between transparent and frosted states through current control, thus playing an important role in privacy protection, light management and energy saving.

[0003] Its core technology principle is that when the film is de-energized, the internal polymer liquid crystal material is arranged in a disordered manner, and the light is scattered, making the film appear as a transparent but opaque milky white atomized state; when the film is energized, the liquid crystal molecules will quickly arrange themselves in an orderly manner under the action of the electric field, allowing light to pass through directly, and the film will then become transparent.

[0004] In existing dimming films, small-sized products have low voltage loss and no delay in color switching (the human eye cannot distinguish the difference). However, large-sized products have high material impedance, high voltage loss, and severe delay in color changing at the tail due to their large size. Therefore, there is a need to provide a large-sized dimming film to improve the color changing consistency of the dimming film. Summary of the Invention

[0005] The purpose of this invention is to provide a large-size dimming film and its manufacturing method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] On the one hand, a large-size dimming film is provided, comprising:

[0008] An upper electrode and a lower electrode are provided, wherein an ITO layer 1 is provided on the lower electrode, an ITO layer 2 is provided on the upper electrode, and a dimming unit 1 is provided between the ITO layer 1 and the ITO layer 2.

[0009] The dimming unit includes a color liquid crystal layer and outer ring wires disposed on both sides of the color liquid crystal layer.

[0010] An electrode wire is provided on the outer ring conductor.

[0011] Preferably, a plurality of dimming units are provided along the length direction of the lower electrode and are separated by a partition layer.

[0012] Preferably, a second dimming unit is provided between the first dimming unit and the upper electrode, an adhesive layer is provided between the first dimming unit and the second dimming unit, and a plurality of second dimming units are provided along the length direction of the lower electrode and separated by a separator layer.

[0013] Preferably, the outer ring conductor located on the inner side is embedded in the adhesive layer, and an ITO layer three is disposed between the color liquid crystal layer one and the outer ring conductor located on the inner side.

[0014] Preferably, an outer ring wire is connected to the outer ring wire, an electrode groove is formed on the outer ring wire, and a ring wire groove is provided on the outer ring wire.

[0015] Preferably, the dimming unit two includes a color liquid crystal layer two and inner ring wires disposed on both sides of the color liquid crystal layer two, and electrode wires two are connected to the inner ring wires.

[0016] Preferably, the inner ring conductor located on the inner side is embedded in the adhesive layer, and an ITO layer four is disposed between the second color liquid crystal layer and the inner ring conductor located on the inner side.

[0017] Preferably, an inner loop wire is also connected to the inner loop wire, the inner loop wire passes through the loop wire groove and connects to the inner loop wire, and the second electrode wire communicates with the inner loop wire at the electrode groove.

[0018] Preferably, the gap between the inner ring conductor located on the outer side and the outer ring conductor located on the outer side is covered by a filler layer.

[0019] On the other hand, a method for manufacturing a large-size dimming film based on any one of the above claims is also provided, comprising:

[0020] S1: A PET film with an ITO layer is selected as the ITO layer one and the lower electrode;

[0021] S2: Print conductive silver paste on the ITO layer and bake it at a temperature of 140 degrees Celsius for 20 minutes to form the outer ring conductor and the outer ring wire.

[0022] S3: A transparent conductive colloid is coated into the gap between the outer ring wire and the outer connecting ring wire and UV cured to form a filler layer;

[0023] S4: The color liquid crystal layer is uniformly coated or printed on the filler layer;

[0024] S5: Magnetron sputter the ITO layer three onto the first color liquid crystal layer;

[0025] S6: Print conductive silver paste on the ITO layer 3 and bake it at a temperature of 140 degrees Celsius for 20 minutes to form the outer ring conductor and the outer ring line located on the inner side and connected to the ITO layer 3.

[0026] S7: Coat the inner outer ring conductor and the outer connecting ring with a layer of transparent insulating colloid and UV cure;

[0027] S8: Print conductive silver paste on the transparent insulating colloid and bake it at a temperature of 140 degrees Celsius for 20 minutes to form the inner ring conductor and the inner connecting ring on the inner side.

[0028] S9: Apply a layer of transparent insulating colloid to the gap between the inner ring conductor and the inner connecting ring conductor located on the inside and UV cure it so that the two layers of transparent insulating colloid form the adhesive layer.

[0029] S10: Magnetron sputter the fourth ITO layer onto the adhesive layer, so that the fourth ITO layer is connected to the inner ring conductor and the inner connecting ring;

[0030] S11: Uniformly coat or print the second color liquid crystal layer on the fourth ITO layer;

[0031] S12: Print conductive silver paste on the second color liquid crystal layer and bake it at a temperature of 140 degrees Celsius for 20 minutes to form the inner ring wire and inner connecting ring wire located on the outer side.

[0032] S13: Repeat S2-S12 to form multiple dimming unit one and dimming unit two;

[0033] S14: Fill the space between multiple dimming unit 1 and dimming unit 2 with insulating colloid and UV cure to form a separation layer;

[0034] S15: Select another PET film with an ITO layer as the second ITO layer and the upper electrode, and attach the upper and lower electrodes together with a transparent conductive adhesive by rolling. After bonding, perform a high temperature and high pressure defoaming process. The general conditions are set as follows: temperature 50°C, pressure 5 kgf, and time 30 minutes.

[0035] S16: A notch is laser-drilled on the edge of the upper and lower electrodes for welding electrode wire one and electrode wire two.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] This invention uses ultra-low impedance silver paste as a conductor to reduce line voltage loss, enabling the voltage of the entire electrode surface to reach the expected requirements instantly. In conjunction with the setting of the separator layer, the large-size dimming film is divided into multiple small-size dimming films, reducing voltage loss and improving the color change consistency of the large-size dimming film. Through the setting of the double-layer color liquid crystal layer, the dimming film can switch between multiple colors. Attached Figure Description

[0038] Figure 1 is a structural schematic diagram of Embodiment 1 of the present invention;

[0039] Figure 2 is a schematic diagram of the exploded structure of Embodiment 1 of the present invention;

[0040] Figure 3 is a structural schematic diagram of Embodiment 2 of the present invention;

[0041] Figure 4 is a structural schematic diagram from another perspective of Embodiment 2 of the present invention;

[0042] Figure 5 is a schematic diagram of the exploded structure of Embodiment 2 of the present invention;

[0043] Figure 6 is a schematic diagram of the exploded structure from a bottom-view perspective in Embodiment 2 of the present invention;

[0044] Figure 7 is a schematic diagram of the adhesive layer of the present invention;

[0045] Figure 8 is a bottom view of the adhesive layer of the present invention;

[0046] Figure 9 is a cross-sectional view of the adhesive layer of the present invention.

[0047] In the diagram: 1. Upper electrode; 2. Lower electrode; 3. ITO layer one; 4. ITO layer two; 5. Outer ring conductor; 6. Electrode conductor one; 7. Separator layer; 8. Adhesive layer; 9. ITO layer three; 10. Outer ring line; 11. Electrode groove; 12. Ring line groove; 13. Color liquid crystal layer two; 14. Inner ring conductor; 15. Electrode conductor two; 16. ITO layer four; 17. Inner ring line; 18. Filler layer; 19. Color liquid crystal layer one. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Please refer to Figures 1 to 9. This invention provides a technical solution:

[0050] Example 1: A large-size dimming film, comprising:

[0051] The upper electrode 1 and the lower electrode 2 are provided. The lower electrode 2 is provided with an ITO layer 3 and the upper electrode 1 is provided with an ITO layer 4. A dimming unit 1 is provided between the ITO layer 3 and the ITO layer 4.

[0052] The dimming unit includes a color liquid crystal layer 19 and outer ring conductors 5 disposed on both sides of the color liquid crystal layer 19. The two outer ring conductors 5 are respectively connected to ITO layer 3 and ITO layer 4. The outer ring conductors 5 are square rings.

[0053] Two electrode wires 6 are provided on the outer ring conductor 5, and are respectively connected to the two outer ring conductors 5.

[0054] The manufacturing method of Example 1: S1: Use a low-resistance ITO film material as the lower electrode 2, which can be a PET film with an ITO layer, requiring a surface impedance ≤10Ω / hole;

[0055] S2: Print silver paste wires and bake them so that the silver paste can better adhere to the electrode surface. The baking temperature is 140℃ and the baking time is 20 minutes.

[0056] S3: Apply or print a color liquid crystal layer 19 evenly over the entire surface of the lower electrode 2. The processing of the lower electrode 2 is now complete.

[0057] S4: Repeat S1-S2 to form upper electrode 1;

[0058] S5: Place the printed sides of the prepared upper and lower electrodes 2 together using a roller bonding method. After bonding, perform a high-temperature and high-pressure defoaming process. The general conditions are set as follows: temperature 50℃, pressure 5kgf, and time 30 minutes.

[0059] S6: A notch is laser-drilled on the edge of the upper and lower electrodes 2. The notches of the upper and lower electrodes 2 can be staggered to facilitate the welding of electrode wire 6.

[0060] Example 2: Compared with Example 1, Example 2 also includes a dimming unit 2.

[0061] Several dimming units are arranged along the length of the lower electrode 2 and are separated by a partition layer 7.

[0062] A dimming unit 2 is provided between dimming unit 1 and upper electrode 1. An adhesive layer 8 is provided between dimming unit 1 and dimming unit 2. The adhesive layer 8 is made of transparent insulating colloid. Several dimming units 2 are provided along the length of lower electrode 2 and are separated by a separating layer 7. The number of dimming units 2 is the same as the number of dimming units 1.

[0063] The outer ring conductor 5 located on the inner side is embedded in the adhesive layer 8, and an ITO layer 9 is disposed between the color liquid crystal layer 19 and the outer ring conductor 5 located on the inner side.

[0064] An outer ring conductor 5 is connected to an outer ring conductor 10. An electrode groove 11 is provided on the outer ring conductor 5, and a ring groove 12 is provided on the outer ring conductor 10. Both the outer ring conductor 5 and the outer ring conductor 10 are square rings.

[0065] The dimming unit 2 includes a color liquid crystal layer 2 13 and inner ring wires 14 disposed on both sides of the color liquid crystal layer 2 13. Electrode wires 2 15 are connected to the inner ring wires 14. There are two sets of inner ring wires 14, which are located on both sides of the color liquid crystal layer 2 13 respectively. There are also two electrode wires 2 15, which are disposed on the two inner ring wires 14 respectively.

[0066] Color liquid crystal layer 13 and color liquid crystal layer 19 are two different colors. When color liquid crystal layer 19 is powered on and color liquid crystal layer 13 is powered off, the color of color liquid crystal layer 13 is displayed. When color liquid crystal layer 19 is powered off and color liquid crystal layer 13 is powered on, the color of color liquid crystal layer 19 is displayed. When both color liquid crystal layer 19 and color liquid crystal layer 13 are powered off, both color liquid crystal layer 19 and color liquid crystal layer 13 display colors. When light shines on the dimming film, a third mixed color can be displayed, or there may be two different colors on both sides when there is no strong light.

[0067] The inner ring conductor 14 located on the inside is embedded in the adhesive layer 8. An ITO layer 16 is provided between the color liquid crystal layer 13 and the inner ring conductor 14 located on the inside. The thickness of the dimming film is reduced by the provision of the adhesive layer 8.

[0068] An inner ring wire 17 is also connected to the inner ring wire 14. The inner ring wire 17 passes through the ring wire groove 12 and connects to the inner ring wire 14. The electrode wire is connected to the inner ring wire 14 at the electrode groove 11. The outer ring wire 5, the outer ring wire 10, the inner ring wire 14 and the inner ring wire 17 have low widths, which do not affect the light transmission effect.

[0069] The gap between the inner ring conductor 14 located on the outside and the outer ring conductor 5 located on the outside is covered by a filler layer 18, which is made of transparent conductive adhesive.

[0070] Manufacturing method of Example 2: S1: Select a PET film with an ITO layer as ITO layer 3 and lower electrode 2;

[0071] S2: Print conductive silver paste on ITO layer 3 and bake it at 140 degrees Celsius for 20 minutes to form outer ring conductor 5 and outer ring line 10.

[0072] S3: A transparent conductive colloid is coated into the gap between the outer ring conductor 5 and the outer connecting ring conductor 10 and UV cured to form a filler layer 18.

[0073] S4: A color liquid crystal layer 19 is uniformly coated or printed on the filler layer 18;

[0074] S5: Magnetron sputtering of ITO layer 9 onto color liquid crystal layer 19;

[0075] S6: Print conductive silver paste on ITO layer 3 9 and bake it at 140 degrees for 20 minutes to form an inner outer ring conductor 5 and an outer ring conductor 10 that are connected to ITO layer 3 9.

[0076] S7: Coat the inner outer ring conductor 5 and the outer connecting ring conductor 10 with a layer of transparent insulating colloid and UV cure;

[0077] S8: Print conductive silver paste on transparent insulating colloid and bake it at 140 degrees for 20 minutes to form inner loop conductor 14 and inner loop conductor 17 located on the inside.

[0078] S9: Apply a layer of transparent insulating colloid to the gap between the inner ring conductor 14 and the inner connecting ring conductor 17 located on the inside and UV cure it so that the two layers of transparent insulating colloid form an adhesive layer 8.

[0079] S10: Magnetron sputter ITO layer 16 on adhesive layer 8 to connect ITO layer 16 with inner ring conductor 14 and inner ring line 17.

[0080] S11: Uniformly coat or print the color liquid crystal layer 13 on the ITO layer 16;

[0081] S12: Print conductive silver paste on the color liquid crystal layer 13 and bake it at a temperature of 140 degrees for 20 minutes to form an inner ring wire 14 and an inner ring wire 17 on the outer side.

[0082] S13: Repeat S2-S12 to form multiple dimming unit one and dimming unit two;

[0083] S14: Fill the space between multiple dimming unit 1 and dimming unit 2 with insulating colloid and UV cure to form a separation layer 7;

[0084] S15: Select another PET film with an ITO layer as ITO layer 4 and upper electrode 1, and attach the upper and lower electrodes 2 together with a transparent conductive adhesive by rolling. After bonding, perform a high temperature and high pressure defoaming process. The general conditions are set as follows: temperature 50℃, pressure 5kgf, time 30 minutes.

[0085] S16: A notch is laser-drilled at the edge of the upper and lower electrodes 2 for welding electrode wire 1 6 and electrode wire 2 15.

[0086] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-size dimming film, characterized in that, include: The device comprises an upper electrode and a lower electrode. An ITO layer 1 is disposed on the lower electrode, and an ITO layer 2 is disposed on the upper electrode. A dimming unit 1 is disposed between the ITO layer 1 and the ITO layer 2. The dimming unit 1 includes a color liquid crystal layer 1 and outer ring conductors disposed on both sides of the color liquid crystal layer 1. Electrode conductors 1 are disposed on the outer ring conductors. Several dimming units 1 are disposed along the length of the lower electrode and separated by a separator layer. A dimming unit 2 is disposed between the dimming unit 1 and the upper electrode, and an adhesive layer is disposed between the dimming unit 1 and the dimming unit 2. Several dimming units 2 are disposed along the length of the lower electrode and separated by a separator layer. The inner outer ring conductors are embedded in the adhesive layer. The color liquid crystal layer 1 and the inner outer ring conductors are... An ITO layer three is disposed between the ring conductors; an outer ring conductor is connected to an outer ring conductor, an electrode groove is formed on the outer ring conductor, and a ring conductor groove is provided on the outer ring conductor; the dimming unit two includes a color liquid crystal layer two and inner ring conductors disposed on both sides of the color liquid crystal layer two, an electrode conductor two is connected to the inner ring conductor; the inner ring conductor located on the inner side is embedded in the adhesive layer, and an ITO layer four is disposed between the color liquid crystal layer two and the inner ring conductor located on the inner side; an inner ring conductor is also connected to the inner ring conductor, the inner ring conductor passes through the ring conductor groove and connects to the inner ring conductor, and the electrode conductor two communicates with the inner ring conductor at the electrode groove; the gaps of the inner ring conductor located on the outer side and the gaps of the outer ring conductor located on the outer side are covered by a filler layer.

2. A method for manufacturing a large-size dimming film based on claim 1, characterized in that, include: S1: A PET film with an ITO layer is selected as the ITO layer one and the lower electrode; S2: Print conductive silver paste on the ITO layer and bake it at 140 degrees Celsius for 20 minutes to form the outer ring conductor and the outer ring line; S3: Coat the gaps between the outer ring conductor and the outer ring line with transparent conductive colloid and UV cure it to form a filler layer; S4: Uniformly coat or print the color liquid crystal layer on the filler layer. S5: Magnetron sputter the ITO layer three onto the first color liquid crystal layer; S6: Print conductive silver paste onto the third ITO layer and bake it at 140 degrees Celsius for 20 minutes to form the outer ring conductor and outer connecting ring on the inner side, which are connected to the third ITO layer; S7: Coat the outer ring conductor and outer connecting ring on the inner side with a layer of transparent insulating colloid and UV cure it; S8: Print conductive silver paste onto the transparent insulating colloid and bake it at 140 degrees Celsius for 20 minutes to form the inner ring conductor and inner connecting ring on the inner side; S9: Coat the gap between the inner ring conductor and inner connecting ring on the inner side with a layer of transparent insulating colloid and UV cure it to form the adhesive layer; S10: Magnetron sputter the fourth ITO layer onto the adhesive layer to connect the fourth ITO layer with the inner ring conductor and inner connecting ring. S11: Uniformly coat or print the second color liquid crystal layer on the fourth ITO layer; S12: Print conductive silver paste on the second color liquid crystal layer and bake it at 140 degrees Celsius for 20 minutes to form the inner ring wire and inner ring wire on the outer side; S13: Repeat S2-S12 to form multiple dimming unit one and dimming unit two; S14: Fill the space between multiple dimming unit one and dimming unit two with insulating colloid and UV cure to form a separator layer; S15: Select another PET film with an ITO layer as the second ITO layer and the upper electrode, and attach the upper and lower electrodes together with transparent conductive colloid by rolling. After bonding, perform a high temperature and high pressure defoaming process. The general conditions are set at 50 degrees Celsius, 5 kgf, and 30 minutes; S16: Laser-cut a notch on the edge of the upper and lower electrodes for welding electrode wire one and electrode wire two.

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