Composite dimming diaphragm, dimming glass and preparation system

Abstract

The invention discloses a composite dimming diaphragm, dimming glass and a preparation system. The preparation system of the composite dimming diaphragm comprises a cutting mechanism, a grasping mechanism, a conveying mechanism and a vacuum compounding mechanism, the cutting mechanism is used for cutting the prepared material to obtain a first diaphragm, a second diaphragm and a dimming diaphragm; the grasping mechanism is used for positioning and grasping the first diaphragm, the second diaphragm and the dimming diaphragm to the conveying mechanism; on the conveying mechanism, the first membrane, the dimming membrane and the second membrane are sequentially stacked and pre-compounded to obtain a pre-compounded membrane, and the conveying mechanism is used for conveying the pre-compounded membrane to the vacuum sheet combining mechanism; the vacuum compounding mechanism is used for heating and pressurizing the pre-compounded membranes so as to complete vacuum compounding and obtain the composite dimming membranes, the preparation system can complete laying of all the membranes on the plane, at the moment, the relative position precision of all the membranes is easier to guarantee, positioning operation is simpler and more accurate, the accuracy rate is higher, and the production efficiency is improved. The production and preparation difficulty can be effectively simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of composite dimming film production, and in particular to a composite dimming film, dimming glass and a preparation system. Background Art

[0002] In recent years, while modern cars are pursuing excellent performance, their requirements for appearance are also constantly increasing; this has also led car manufacturers to begin using dimming glass on their vehicles. Dimming glass can meet users' aesthetic needs and effectively improve the privacy, practicality and safety of the vehicle.

[0003] In the prior art, when preparing dimming glass, before assembling, the first film (i.e., the intermediate film), the dimming film, and the second film (i.e., the intermediate film) are sequentially stacked and placed on the curved glass. During the film laying process, each type of film can be positioned and laid in sequence manually. The disadvantage of this manual assembling and laying method is that the position accuracy between the films is difficult to guarantee, and the production efficiency is low.

[0004] In addition, during the film laying process, a vacuum manipulator with a contoured suction cup mechanism can be used to grab the film on the plane, then absorb the film to a shape consistent with the glass surface, and then lay the film on the curved glass. However, each type of film must correspond to a set of grabbing mechanisms, and the grabbing mechanisms must also be replaced when the type of film is changed; at the same time, since each type of film is laid on the curved glass in sequence, the error is large, the relative position accuracy between the films cannot be guaranteed, and it is easy to cause the dimming film with overlapping edge films to bend, resulting in a high defect rate and low production efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a preparation system for a composite dimming film, which does not require each layer of film to be laid on the curved glass in sequence, and can complete the laying of each film on a plane, so as to solve the problems in the prior art that the relative position accuracy between each film cannot be guaranteed, which easily leads to the bending of the dimming film due to overlapping edge films and low production efficiency.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a preparation system of a composite dimming film, including a cutting mechanism, a gripping mechanism, a conveying mechanism and a vacuum compound mechanism;

[0007] The cutting mechanism is used to cut the prepared material to obtain the first diaphragm, the second diaphragm and the dimming diaphragm;

[0008] The gripping mechanism is used to position and grip the first film, the second film and the dimming film to the conveying mechanism;

[0009] On the conveying mechanism, the first film sheet, the dimming film sheet and the second film sheet are sequentially stacked and pre-compounded to obtain a pre-compounded film sheet, and the conveying mechanism is used to convey the pre-compounded film sheet to the vacuum compounding mechanism;

[0010] The vacuum compounding mechanism is used to perform vacuum compounding on the pre-compounded film to obtain the composite dimming film.

[0011] Furthermore, the conveying mechanism includes a conveyor belt, and the first film sheet, the dimming film sheet and the second film sheet are sequentially stacked on the plane of the conveyor belt, and pre-compounded on the plane of the conveyor belt.

[0012] Furthermore, the vacuum lamination mechanism is used to heat and pressurize the pre-laminated film to complete vacuum lamination.

[0013] Furthermore, the preparation system also includes a rapid cooling mechanism, which is used to rapidly cool the vacuum compounded membrane.

[0014] Furthermore, the gripping mechanism is a robot, which includes a robot arm and a contour-like adsorption structure, and the contour-like adsorption structure is installed at the end of the robot arm.

[0015] Furthermore, the preparation system also includes an optical positioning mechanism, and the optical positioning mechanism is used to guide the gripping mechanism to grip the first membrane, the dimming membrane, the second membrane and the vacuum composite membrane.

[0016] In addition, another object of the present invention is to provide a composite dimming film, which is specifically prepared using the above-mentioned composite dimming film preparation system of the present invention, the composite dimming film includes the first film, the second film and the dimming film, and the dimming film is arranged between the first film and the second film.

[0017] Further, the first film sheet and the second film sheet are each independently selected from a polyvinyl butyral (PVB) film, an ethylene vinyl acetate (EVA) film or a thermoplastic polyurethane (TPU) film.

[0018] Furthermore, the dimming film includes a dimming layer, and the dimming layer is selected from at least one of an EC dimming layer, an SPD dimming layer, a LV dimming layer and an LC dimming layer.

[0019] Furthermore, a filler layer is provided between the side of the dimming layer and the first film and the second film, and the filler layer is spliced ​​with the dimming layer;

[0020] The edge filling layers are each independently selected from a polyvinyl butyral (PVB) film, an ethylene vinyl acetate (EVA) film or a thermoplastic polyurethane (TPU) film.

[0021] Furthermore, the dimming film also includes a conductive layer and an electrode, the conductive layer is in contact with the dimming layer, and the electrode is electrically connected to the conductive layer.

[0022] Furthermore, the composite dimming film is a curved film or a flat film.

[0023] Furthermore, the curved diaphragm is a single-curved diaphragm, the curvature radius of the single-curved diaphragm is R1, the composite dimming diaphragm is used to form a dimming glass, the dimming glass is a single-curved glass, the curvature radius of the dimming glass is R2, and R1>R2.

[0024] Furthermore, the curved diaphragm is a hyperbolic diaphragm, the main curvature radius of the hyperbolic diaphragm is R11, the secondary curvature radius of the hyperbolic diaphragm is R12, and R11<R12; the composite dimming diaphragm is used to form dimming glass, the dimming glass is hyperbolic glass, the main curvature radius of the dimming glass is R21, the secondary curvature radius of the dimming glass is R22, R21<R22; R11>R21 and / or R12>R22.

[0025] In the above technical solution of the present invention, during the rapid cooling and shaping stage, the above-mentioned composite dimming film can be made into a curved film, which can be processed into a curved surface using a mold; of course, the composite dimming film can also be specifically a flat film, and during the initial pressure and high-pressure bonding process, the flat composite dimming film can be pressed into a curve using the weight of the glass to facilitate bonding to the curved glass.

[0026] In addition, another object of the present invention is to provide a dimming glass, which includes a first glass, a second glass and the above-mentioned composite dimming film of the present invention, and the composite dimming film is arranged between the first glass and the second glass, and the dimming glass is a single-curved glass or a double-curved glass.

[0027] Furthermore, the dimming glass is a single-curved glass, and the curvature radius of the dimming glass is R2, and R2 is ≥ 1200 mm;

[0028] Alternatively, the dimming glass is a hyperbolic glass, the primary curvature radius of the dimming glass is R21, the secondary curvature radius of the dimming glass is R22, R21<R22, R21≥1100mm, and R22 is 10000-60000mm.

[0029] The beneficial effects of the present invention are as follows: the preparation system of the composite dimming film of the present invention can pre-compound a plurality of films on the plane of the conveyor belt of the conveying mechanism, and then input the plurality of films into the vacuum compounding mechanism for heating and pressurizing to complete the vacuum compounding and obtain the desired composite dimming film. In other words, the present invention can complete the laying of each film on a plane, at which time the relative position accuracy between each film is easier to ensure, the positioning operation is simpler and more accurate, the accuracy is higher, and it is not easy to cause the problem of bending of the dimming film due to overlapping edge films, which can effectively simplify the difficulty of production and preparation, reduce the error and accuracy difference of the film assembly, and improve production efficiency. In addition, since the film adsorption and laying in the present invention are both carried out on a plane, the structure of the composite dimming film preparation system used is simple, the cost is low, and the preparation system has strong versatility and can be applied to products of different specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the preparation system of the composite dimming film described in the present invention.

[0031] Figure 2 It is a schematic diagram of the structure of the gripping mechanism in the preparation system described in the present invention.

[0032] Figure 3 It is a schematic diagram of the structure of the composite dimming film described in the present invention. DETAILED DESCRIPTION

[0033] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0034] In the prior art, the existing membrane adsorption and laying mechanism first adsorbs each layer of membrane to a shape consistent with the glass curve, and then lays it on the curved glass. The relative position accuracy between the membranes is difficult to ensure, and the problem of bending of the dimming film due to overlapping edge membranes is easy to occur, and the defective rate is high. At the same time, the cost of a set of original membrane adsorption and laying mechanisms is high. If a dimming product requires at least 4 types of membranes, it means that at least 4 sets of membrane adsorption and laying mechanisms are required. A new membrane adsorption and laying mechanism needs to be developed for each product, which requires a large long-term investment and a very high production cost.

[0035] Therefore, in order to solve the problems existing in the above-mentioned prior art, Figure 1 and Figure 2 As shown, in this embodiment, the present invention designs a composite dimming film preparation system 100 for producing the composite dimming film 1. Figure 1 It can be seen that the composite dimming film preparation system 100 designed in the present invention specifically includes: a cutting mechanism 10, a gripping mechanism 20, a conveying mechanism 30, a vacuum compounding mechanism 40 and a fast cooling mechanism.

[0036] In the present invention, the cutting mechanism 10 is used to cut the prepared materials to obtain the first film 2, the dimming film 3 and the second film 4; the gripping mechanism 20 is used to position and grip the first film 2, the dimming film 3 and the second film 4 to the conveying mechanism 30; wherein, on the conveying mechanism 30, the above-mentioned first film 2, the dimming film 3 and the second film 4 are sequentially stacked and pre-compounded to obtain a pre-compounded film, and the conveying mechanism 30 can be used to convey and transport the pre-compounded film; the conveying mechanism 30 conveys the above-mentioned obtained pre-compounded film to the vacuum compounding mechanism 40 accordingly, so as to heat and heat the pre-compounded film through the vacuum compounding mechanism 40, thereby completing the vacuum compounding, and the desired composite dimming film 1 can be obtained after the vacuum compounding.

[0037] In the present invention, the conveying mechanism 30 includes a conveyor belt, which is a plane. It should be pointed out that when the preparation system 100 of the composite dimming film of the present invention is used, the preparation system uses its own cutting mechanism 10 to complete the contour cutting of the required film, and then pre-compounds it on the conveyor belt of the conveying mechanism 30. That is to say, multiple films can be pre-compounded on the plane of the conveyor belt and obtain pre-compounded films, and then input into the vacuum compounding mechanism 40 for heating and pressurization to complete vacuum compounding and obtain the required composite dimming film 1. Since multiple films are positioned and pre-compounded on a plane, the error is small, the relative position accuracy between the films can be effectively guaranteed, and the problem of bending of the dimming film due to overlapping edge films is not easy to occur, which can effectively simplify the difficulty of production and improve production efficiency.

[0038] It should be pointed out that in the present invention, when performing profile cutting and preparing materials, the materials of the first film 2, the dimming film 3, and the second film 4 all have the problem of shrinkage, wherein the shrinkage amount may be 3-10 mm per meter due to the influence of temperature and storage time. Therefore, in practical applications, the present invention needs to compensate for the shrinkage amount of each film to perform profile cutting and preparing materials, thereby obtaining the first film 2, the dimming film 3, and the second film 4. In other words, when the cutting mechanism 10 performs profile cutting on each film, the size of the first film 2, the dimming film 3, and the second film 4 is controlled according to the elastic modulus of each film.

[0039] Accordingly, the conveying mechanism 30 is used to convey the above-obtained pre-compounded film to the vacuum compounding mechanism 40, so that the pre-compounded film is heated and heated by the vacuum compounding mechanism 40, thereby completing vacuum compounding. After vacuum compounding, the desired composite dimming film can be obtained. In order to ensure the performance of the composite dimming film, the composite dimming film can also be conveyed to the fast cooling mechanism for fast cooling and shaping. The vacuum compounding mechanism 40 adjusts the appropriate temperature according to the characteristics of the composite dimming film.

[0040] In the present invention, during the rapid cooling and shaping stage, the above-mentioned composite dimming film can be made into a curved film, which can be processed into a curved surface using a mold. Specifically, the curved film can be a single-curved film, and the curvature radius of the single-curved film is R1. The composite dimming film of the present invention is used to form dimming glass, and the dimming glass is single-curved glass, and the curvature radius of the dimming glass is R2, R1>R2; the curved film can also be a hyperbolic film, and the main curvature radius of the hyperbolic film is R11, and the secondary curvature radius of the hyperbolic film is R12, R11<R12; the composite dimming film in the present invention is used to form dimming glass, and the dimming glass is hyperbolic glass, and the main curvature radius of the dimming glass is R21, and the secondary curvature radius of the dimming glass is R22, R21<R22; R11>R21 and / or R12>R22. Of course, the composite dimming film can also be a flat film, and during the lamination process of the curved glass and the composite dimming film, the weight of the curved glass itself is used to press the flat composite dimming film into a curve so as to fit the curved glass.

[0041] In the present invention, the gripping mechanism 20 is a manipulator, which includes a manipulator arm 201 and a contoured adsorption structure 202, and the contoured adsorption structure 202 is installed at the end of the manipulator arm 201. The contoured adsorption structure 202 can not only adsorb and fix the first diaphragm 2, the dimming diaphragm 3, and the second diaphragm 4 by vacuum adsorption, but also lay the first diaphragm 2, the dimming diaphragm 3, and the second diaphragm 4 on the conveyor belt. The inventors have actually found that since the adsorption and laying of the diaphragms in the present invention are both carried out on a plane, the adsorption laying mechanism (i.e., the gripping mechanism 20) actually used has a simple structure, low cost, and strong versatility, and can be applied to products of different specifications and sizes.

[0042] In the present invention, the preparation system 100 of the composite dimming film also includes an optical positioning mechanism, which is used to guide the gripping mechanism 20 to grab the first film 2, the dimming film 3, the second film 4 and the film after vacuum compounding. Preferably, the optical positioning mechanism is an industrial camera. That is to say, the present invention uses the industrial camera vision to guide the manipulator to position and grab the first film 2, the dimming film 3 and the second film 4 in sequence, and position and place them on the conveyor belt to complete the pre-compounding of the first film 2, the dimming film 3 and the second film 4 to obtain a pre-compounded film. In addition, the present invention can also use the industrial camera vision to guide the manipulator to adsorb the vacuum compounded film and lay it on the curved glass.

[0043] In actual application, the composite dimming film preparation system 100 can prepare the composite dimming film 1 on a plane in advance, and the composite dimming film 1 can be positioned as a whole and laid on the curved glass, so as to combine the curved glass and the composite dimming film 1 to prepare the required dimming glass, thereby reducing the combination error, simplifying the difficulty of production and improving production efficiency. In other words, the composite dimming film preparation system 100 of the present invention does not need to lay each layer of film on the curved glass in sequence, and it can complete the laying of each film on the plane. At this time, the relative position accuracy between each film is easier to ensure, the positioning operation is simpler and more accurate, the accuracy is higher, and it is not easy to cause the problem of bending of the dimming film with overlapping edge films, which can effectively simplify the difficulty of production and preparation, reduce the combination error and precision difference, and improve production efficiency.

[0044] In addition, the present invention further provides a composite dimming film 1, which is specifically prepared by the above-mentioned preparation system of the present invention. The composite dimming film includes a first film 2, a dimming film 3 and a second film 4, and the dimming film 3 is arranged between the first film 2 and the second film 4. Figure 3 shown.

[0045] In the present invention, the first film sheet 2 and the second film sheet 4 are each independently selected from a polyvinyl butyral (PVB) film, an ethylene vinyl acetate (EVA) film or a thermoplastic polyurethane (TPU) film.

[0046] In the present invention, the dimming film 3 includes a dimming layer 31 , and the dimming layer is selected from at least one of an EC dimming layer, an SPD dimming layer, an LV dimming layer and an LC dimming layer.

[0047] In the present invention, a filler layer 32 is arranged on the side of the dimming layer 31 and between the first film 2 and the second film 4, and the filler layer 32 is spliced ​​with the dimming layer 31; the filler layers 32 are independently selected from polyvinyl butyral (PVB) film, ethylene vinyl acetate (EVA) film or thermoplastic polyurethane (TPU) film.

[0048] In the present invention, the dimming film 3 further includes a conductive layer (not shown) and an electrode (not shown), the conductive layer is in contact with the dimming layer 31, and the electrode is electrically connected to the conductive layer.

[0049] In addition, the present invention further provides a dimming glass, which includes a first glass, a second glass and the above-mentioned composite dimming film 1, and the composite dimming film 1 is arranged between the first glass and the second glass.

[0050] In the present invention, the dimming glass is single-curved glass or double-curved glass. Specifically, the dimming glass can be single-curved glass, and the curvature radius of the dimming glass is R2, R2≥1200mm; the dimming glass can also be double-curved glass, and the primary curvature radius of the dimming glass is R21, and the secondary curvature radius of the dimming glass is R22, R21<R22, R21≥1100mm, and R22 is 10000-60000mm.

[0051] In the present invention, the method for preparing dimming glass specifically comprises the steps of:

[0052] (1) providing a first glass, a second glass and the composite dimming film 1 of the present invention;

[0053] (2) Placing the composite dimming film 1 between the first glass and the second glass, and obtaining the dimming glass after initial pressing and high-pressure lamination.

[0054] In the present invention, in order to obtain better implementation effects, when actually performing initial pressing and high-pressure sheeting processes, it is preferred to control the initial pressing temperature to 95°C-115°C, the high-pressure temperature to 125°C-145°C, and the high-pressure sheeting pressure to 0.5MPa-2.0MPa.

[0055] In order to verify the reliability of the preparation system, the inventor used the preparation system to prepare a composite dimming film 1, which includes a first film 2, a dimming film 3 and a second film 4, wherein the first film 2 and the second film 4 are both PVB films, and the dimming film 3 is arranged between the first film 2 and the second film 4. The dimming film 3 includes a dimming layer 31 and a filler layer 32, and the filler layer 32 is spliced ​​with the dimming layer 31; the dimming layer 31 is selected from at least one of an EC dimming layer, an SPD dimming layer, an LV dimming layer and an LC dimming layer; the filler layer 32 is a PVB film.

[0056] In the present invention, after the composite dimming film 1 is obtained through the preparation system, the composite dimming film 1 is grasped by a robot guided by industrial camera vision to place the composite dimming film 1 between the first glass and the second glass, and the dimming glass is obtained after initial pressing and high-pressure lamination treatment.

[0057] In an embodiment of the present invention, the first glass and the second glass are both curved glass, the composite dimming film 1 can be a curved film or a flat film, and when actually performing the initial pressing and high-pressure bonding processes, the initial pressing temperature can be specifically controlled to be 95°C-115°C, the high-pressure temperature can be controlled to be 125°C-145°C, and the high-pressure bonding pressure can be controlled to be 0.5MPa-2.0MPa. After completing the above-mentioned initial pressing and high-pressure bonding processes, the corresponding dimming glass can be obtained.

[0058] In order to ensure the quality of the composite dimming film 1 produced, the inventors conducted relevant tests on the composite dimming film 1 produced by the present invention, and the test process and results are as follows:

[0059] (1) Observation with naked eyes: The composite dimming film 1 prepared in the embodiment of the present invention is flat and wrinkle-free.

[0060] (2) Bending test: The composite dimming film 1 prepared in the embodiment of the present invention can be bent normally, and its flexibility meets the requirements of the assembly operation.

[0061] (3) Optical state test of the edge after high pressure: The composite dimming film 1 prepared in the embodiment of the present invention is flat and wrinkle-free, and the edge and center of the dimming film 3 are wrinkle-free and the image is not reflected and deformed.

[0062] (4) Effectiveness of power on and off: The composite dimming film 1 prepared in the embodiment of the present invention is powered on and the power on is effective.

[0063] From the above, it can be seen that the composite dimming film 1 prepared by the preparation system 100 designed by the present invention has better performance. This is because the preparation system 100 of the composite dimming film of the present invention does not need to lay each layer of film on the curved glass in sequence, and it can complete the laying of each film on the plane. At this time, the relative position accuracy between each film is easier to ensure, the positioning operation is simpler and more accurate, the accuracy is higher, and it is not easy to cause the problem of bending of the dimming film due to overlapping edge films, which can effectively simplify the difficulty of production and preparation, reduce the error and accuracy difference of the assembly, and improve production efficiency.

[0064] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A system for preparing a composite dimming film, characterized in that: It includes a cutting mechanism, a gripping mechanism, a conveying mechanism and a vacuum compounding mechanism; The cutting mechanism is used to cut the prepared material to obtain the first diaphragm, the second diaphragm and the dimming diaphragm; The gripping mechanism is used to position and grip the first film, the second film and the dimming film to the conveying mechanism; On the conveying mechanism, the first film sheet, the dimming film sheet and the second film sheet are sequentially stacked and pre-compounded to obtain a pre-compounded film sheet, and the conveying mechanism is used to convey the pre-compounded film sheet to the vacuum compounding mechanism; The vacuum compounding mechanism is used to perform vacuum compounding on the pre-compounded film to obtain the composite dimming film.

2. The preparation system according to claim 1, characterized in that: The conveying mechanism comprises a conveying belt, and the first film sheet, the dimming film sheet and the second film sheet are sequentially stacked on the plane of the conveying belt, and pre-compounded on the plane of the conveying belt.

3. The preparation system according to claim 1, characterized in that: The vacuum compounding mechanism is used to heat and pressurize the pre-compounded film to complete vacuum compounding.

4. The preparation system according to claim 3, characterized in that: The preparation system also includes a rapid cooling mechanism, which is used to rapidly cool the vacuum compounded membrane.

5. The preparation system according to claim 1, characterized in that: The gripping mechanism is a manipulator, which includes a manipulator arm and a contoured adsorption structure, and the adsorption structure is installed at the end of the manipulator arm.

6. The preparation system according to claim 1, characterized in that: The preparation system further includes an optical positioning mechanism, and the optical positioning mechanism is used to guide the gripping mechanism to grip the first film, the dimming film, the second film, and the vacuum-compounded film.

7. A composite dimming film, characterized in that: The composite dimming film is prepared by the preparation system according to any one of claims 1 to 6, and the composite dimming film includes the first film, the second film and the dimming film, and the dimming film is arranged between the first film and the second film.

8. The composite dimming film according to claim 7, characterized in that: The first film sheet and the second film sheet are each independently selected from a polyvinyl butyral (PVB) film, an ethylene vinyl acetate (EVA) film or a thermoplastic polyurethane (TPU) film.

9. The composite dimming film according to claim 7, characterized in that: The dimming film comprises a dimming layer, and the dimming layer is selected from at least one of an EC dimming layer, an SPD dimming layer, a LV dimming layer and an LC dimming layer.

10. The composite dimming film according to claim 9, characterized in that: A filling layer is arranged on the side of the dimming layer and between the first film and the second film, and the filling layer is spliced ​​with the dimming layer; the filling layers are independently selected from polyvinyl butyral (PVB) film, ethylene vinyl acetate (EVA) film or thermoplastic polyurethane (TPU) film.

11. The composite dimming film according to claim 7, characterized in that: The composite dimming film is a flat film or a curved film.

12. The composite dimming film according to claim 11, characterized in that: The curved diaphragm is a single-curved diaphragm, and the curvature radius of the single-curved diaphragm is R1. The composite dimming diaphragm is used to form a dimming glass, and the dimming glass is a single-curved glass, and the curvature radius of the dimming glass is R2, and R1>R2.

13. The composite dimming film according to claim 11, characterized in that: The curved diaphragm is a hyperbolic diaphragm, the main curvature radius of the hyperbolic diaphragm is R11, the secondary curvature radius of the hyperbolic diaphragm is R12, and R11<R12; the composite dimming diaphragm is used to form dimming glass, the dimming glass is a hyperbolic glass, the main curvature radius of the dimming glass is R21, the secondary curvature radius of the dimming glass is R22, R21<R22; R11>R21 and / or R12>R22.

14. A dimming glass, characterized in that: It comprises a first glass, a second glass and a composite dimming film as described in any one of claims 7 to 13, wherein the composite dimming film is arranged between the first glass and the second glass, and the dimming glass is a single-curved glass or a double-curved glass.

15. The switchable glass according to claim 14, characterized in that: The dimming glass is a single-curved glass, and the curvature radius of the dimming glass is R2, R2 ≥ 1200 mm; Alternatively, the dimming glass is a hyperbolic glass, the primary curvature radius of the dimming glass is R21, the secondary curvature radius of the dimming glass is R22, R21<R22, R21≥1100mm, and R22 is 10000-60000mm.

Images