Dimming diaphragm, edge sealing method thereof, dimming glass and vehicle

Abstract

The invention discloses a dimming diaphragm and an edge sealing method thereof, dimming glass and a vehicle, the dimming diaphragm comprises a diaphragm body, the diaphragm body comprises a first base material layer, a dimming layer and a second base material layer, the first base material layer is provided with a first surface and a second surface, and the second base material layer is provided with a third surface and a fourth surface; the edge sealing part wraps the edge part of the diaphragm body, and the edge sealing part covers the dimming layer and extends to the first base material layer and the second base material layer in the thickness direction of the diaphragm body; and the edge sealing component is fused and fixed with the side edge parts of the first base material layer and the second base material layer or the first surface and the fourth surface close to the side edge parts of the first base material layer and the second base material layer to form a circumferentially closed barrier structure. According to the edge sealing device, the edge sealing width can be effectively reduced, the edge sealing quality is improved, in addition, the edge sealing cost can be reduced, the edge sealing efficiency is improved, and the edge sealing attractiveness is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle window glass, and in particular to a dimming film and an edge sealing method thereof, dimming glass, and a vehicle. Background Art

[0002] Car windows are an essential component of a vehicle. To ensure driving safety, window glass must possess high strength, rigidity, and other safety performance parameters. Window glass is typically designed as laminated glass, consisting of two or more sheets of inorganic glass interposed with one or more functional film layers.

[0003] In related art, when the functional film layer is configured as a dimming film, for example, the dimming film can be connected to the two glass substrates via adhesive layers. The dimming film can be used to adjust the light transmission effect of the window glass, thereby at least achieving switching between bright and dark states.

[0004] When dimming films are used in automotive laminated glass, they are easily corroded by water vapor in the environment or small molecule plasticizers in the interlayer film. Therefore, the dimming films need to be edge-sealed to prevent corrosion from various substances in the environment.

[0005] However, there is still much room for improvement in the existing edge sealing methods of the dimming films. Summary of the Invention

[0006] In response to the defects of the existing technology, the embodiments of the present invention provide a dimming film and its edge sealing method, dimming glass, and vehicle, which can effectively reduce the edge sealing width and improve the edge sealing quality. In addition, it can also reduce the edge sealing cost, improve the edge sealing efficiency, and ensure the aesthetics of the edge sealing.

[0007] The specific technical solutions of the embodiments of the present invention are:

[0008] A dimming film, the dimming film comprising: a film body, the film body comprising: a first substrate layer, a dimming layer and a second substrate layer, the first substrate layer having a first surface away from the dimming layer and a second surface close to the dimming layer, the second surface being provided with a first conductive layer; the second substrate layer having a third surface close to the dimming layer and a fourth surface away from the dimming layer, the third surface being provided with a second conductive layer; an edge sealing component, the edge sealing component being wrapped around the edge of the film body, the wrapping path of the edge sealing component being consistent with the contour of the film body, and in the thickness direction of the film body, the edge sealing component covering the dimming layer and extending to the first substrate layer and the second substrate layer; the edge sealing component being melted and fixed to the side edges of the first substrate layer and the second substrate layer to form a barrier structure, or the edge sealing component being melted and fixed to the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer to form a barrier structure.

[0009] In a preferred embodiment, the barrier structure is located on the side edge of the diaphragm body, and the barrier structure is a line-welded structure that follows the outer contour of the diaphragm body; or, the barrier structure is located on the first surface and the fourth surface near the side edges of the first substrate layer and the second substrate layer, and the barrier structure is a line-welded structure that follows the R-angle contour of the diaphragm body.

[0010] In a preferred embodiment, the barrier structure is located on the side edges of the first substrate layer and the second substrate layer, and the material of the edge sealing component includes any one of the following: transparent plastic or opaque material; or, the barrier structure is located on the first surface and the fourth surface near the side edges of the first substrate layer and the second substrate layer, and the material of the edge sealing component includes a transparent plastic with bendability and toughness.

[0011] In a preferred embodiment, the barrier structure is located at the side edges of the first substrate layer and the second substrate layer, and the thickness of the edge sealing component is between 10 μm and 400 μm; alternatively, the barrier structure is located at the first surface and the fourth surface near the side edges of the first substrate layer and the second substrate layer, and the thickness of the edge sealing component is between 20 μm and 100 μm.

[0012] In a preferred embodiment, when the barrier structure is located on the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer, the distance from the bending position of the edge sealing component to the side edges of the first substrate layer and the second substrate layer is within 10 mm.

[0013] In a preferred embodiment, the barrier structure is located at the side edges of the first substrate layer and the second substrate layer, and in the thickness direction of the diaphragm body, the dimension of the edge sealing component exceeding the thickness of the diaphragm body is H, and H≤2mm; or, the barrier structure is located at the first surface and the fourth surface near the side edges of the first substrate layer and the second substrate layer, and the dimension of the edge sealing component exceeding the thickness of the diaphragm body in the width direction is H, and H is between 2mm and 200mm.

[0014] In a preferred embodiment, the width W of the edge sealing component, the thickness w of the diaphragm body, the dimension H1 of the edge sealing component exceeding the first surface of the first substrate layer in the width direction, and the dimension H2 of the edge sealing component exceeding the fourth surface of the second substrate layer in the width direction satisfy the following relationship: W=H1+H2+w, and W is between 400μm and 400mm.

[0015] In a preferred embodiment, the barrier structure is located at the side edges of the first substrate layer and the second substrate layer, and the barrier structure includes: a first welding portion arranged between the first side of the edge sealing component and the side edge of the first substrate layer, and a second welding portion arranged between the first side of the edge sealing component and the side edge of the second substrate layer; or, the barrier structure is located at the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer, and the barrier structure includes: a first welding portion arranged between the first side of the edge sealing component and the first surface, and a second welding portion arranged between the first side of the edge sealing component and the second surface.

[0016] A dimming glass comprises any one of the dimming films described above.

[0017] In a preferred embodiment, the smart glass further includes: an outer sheet of glass and an inner sheet of glass, the outer sheet of glass is connected to the smart film by a first adhesive layer, and the inner sheet of glass is connected to the smart film by a second adhesive layer, the smart glass further includes: a shielding area, the shielding area is arranged in a predetermined peripheral area between the first adhesive layer and the outer sheet of glass, and a predetermined outer ring area between the second adhesive layer and the inner sheet of glass, the edge sealing component exceeds the thickness H of the film body in the width direction, the distance D from the bending position of the edge sealing component to the side edge of the first substrate layer and the second substrate layer, and the width L of the shielding area of the smart glass, and the thickness d of the edge sealing component satisfies the following relationship: H+D+d+5mm≤L.

[0018] A vehicle comprising any of the above-mentioned dimming glass.

[0019] A method for sealing the edges of a dimming film, the dimming film comprising: a film body, the film body comprising: a first substrate layer, a dimming layer, and a second substrate layer, the first substrate layer having a first surface away from the dimming layer and a second surface close to the dimming layer, the second surface being provided with a first conductive layer; the second substrate layer having a third surface close to the dimming layer and a fourth surface away from the dimming layer, the third surface being provided with a second conductive layer; the method for sealing the edges of the dimming film comprising the following steps:

[0020] Align the edge strip with the edge of the membrane body so that 1 / 3 to 1 / 2 of the width of the edge strip covers the edge of the first surface;

[0021] Welding the edge banding strip to the edge of the first surface according to a preset trajectory to form a first welding portion;

[0022] Then, the membrane body is turned over, and the edge sealing strip is bent to cover the edge of the fourth surface;

[0023] The edge banding is welded to the edge of the fourth surface according to a preset trajectory to form a second welding portion, and the first welding portion and the second welding portion form a barrier structure that isolates the dimming layer.

[0024] In a preferred embodiment, before the step of forming the first welding portion, the edge sealing method of the dimming film further includes: setting welding points on the edge sealing strip and the edge of the first surface and the edge of the fourth surface, and pre-positioning them by spot welding.

[0025] In a preferred embodiment, the method of forming the first welding portion and the second welding portion and setting the welding points includes laser welding. When the length of the edge banding strip is greater than 500 mm, the welding point spacing is controlled to be between 100 mm and 200 mm; when the length of the edge banding strip is between 200 mm and 500 mm, the welding point spacing is controlled to be between 50 mm and 100 mm; when the length of the edge banding strip is within 200 mm, the welding point spacing is controlled to be between 10 mm and 50 mm.

[0026] A method for sealing the edges of a dimming film, the dimming film comprising: a film body, the film body comprising: a first substrate layer, a dimming layer, and a second substrate layer, the first substrate layer having a first surface away from the dimming layer and a second surface close to the dimming layer, the second surface being provided with a first conductive layer; the second substrate layer having a third surface close to the dimming layer and a fourth surface away from the dimming layer, the third surface being provided with a second conductive layer; the method for sealing the edges of the dimming film comprising the following steps:

[0027] placing the edge sealing strip against the side of the diaphragm body;

[0028] The edge banding is linearly welded to the first substrate layer and the second substrate layer along the outer contour path of the diaphragm body, so that the edge banding is welded and fixed to the side of the diaphragm body to form a barrier structure that isolates the dimming layer.

[0029] The technical solution of the present invention has the following significant beneficial effects:

[0030] In the embodiment of the present application, a circumferentially closed barrier structure is formed by melting and fixing between the inner side of the edge sealing component and the side edge portion or the surface close to the side edge portion of the first substrate layer and the second substrate layer of the diaphragm body. This can effectively control the edge sealing width, achieve a narrower edge sealing effect, and ensure the aesthetics of the edge sealing. At the same time, by setting up the circumferentially closed barrier structure, the intermediate active material layer (i.e., the dimming layer) of the dimming diaphragm can be effectively protected from erosion by external environmental substances, thereby improving the edge sealing quality.

[0031] The barrier structure can be formed by laser welding. Laser welding can ensure good edge sealing stability and achieve a narrow edge sealing effect with better aesthetics. Laser processing is fast and does not require further processing steps such as heat curing, which can effectively reduce edge sealing costs and improve edge sealing efficiency.

[0032] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby. Within the spirit and scope of the appended claims, the embodiments of the present invention include many variations, modifications, and equivalents. Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0034] Figure 1 This is a schematic structural diagram of a diaphragm body of a dimming diaphragm provided in an embodiment of the present application;

[0035] Figure 2 A schematic structural diagram of an edge sealing strip for edge sealing of a dimming film provided in an embodiment of the present application;

[0036] Figure 3 This is one of the cross-sectional schematic diagrams of a dimming film provided in an embodiment of the present application;

[0037] Figure 4 for Figure 3 A partial enlarged view of point I in the middle;

[0038] Figure 5 This is a second cross-sectional schematic diagram of a dimming film provided in an embodiment of the present application;

[0039] Figure 6 for Figure 5 A partial enlarged view of position II in the middle;

[0040] Figure 7 This is a schematic structural diagram of a switchable glass provided in an embodiment of the present application;

[0041] Figure 8 A schematic diagram of a dimming film provided in an embodiment of the present application using surface welding;

[0042] Figure 9 A schematic diagram of a dimming film provided in an embodiment of the present application using side welding;

[0043] Figure 10 This is a flowchart of the steps of an edge sealing method for a dimming film provided in an embodiment of the present application.

[0044] Reference numerals of this application:

[0045] 1. Outer glass;

[0046] 2. First bonding layer;

[0047] 3. Bonding the edge layer;

[0048] 4. Dimming film;

[0049] 40. Diaphragm body;

[0050] 41. a first substrate layer;

[0051] 411. first surface;

[0052] 412, second surface;

[0053] 42. a first conductive layer;

[0054] 43. Dimming layer;

[0055] 44. a second conductive layer;

[0056] 45. a second substrate layer;

[0057] 453, third surface;

[0058] 454, fourth surface;

[0059] 5. Second adhesive layer;

[0060] 6. Inner glass;

[0061] 7. Sheltered area;

[0062] 8. Edge banding components;

[0063] 801, edge banding;

[0064] 80. Barrier structure;

[0065] 81. First welding part;

[0066] 82. Second welding portion. DETAILED DESCRIPTION

[0067] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0068] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0070] The current mainstream edge banding technologies include: Y-shaped edge banding, edge banding with edge banding glue, U-shaped edge banding, etc.

[0071] With the increasing use of dimming films in automotive glass, more and more car models are being equipped with dimming glass. While the glass design is becoming more beautiful, the difficulty and requirements of edge sealing for dimming glass are also increasing. Existing edge sealing methods are mostly suitable for dimming sunroofs. Because all four sides of the dimming sunroof can be covered by the ink printed edge of the glass, the edge sealing of various types of dimming is generally invisible in actual vehicles.

[0072] For skylight glass, the black border width is becoming increasingly narrower for aesthetic reasons, necessitating a correspondingly narrower edge seal width for the dimming film. Unlike skylights, door glass, due to its ability to be raised and lowered, has its top edge visible and exposed to the vehicle exterior. Therefore, dimming door glass has even stricter dimensional requirements for edge seal appearance. The exposed edge seal width for dimming door glass is significantly smaller than for dimming skylights.

[0073] Among them, the Y-type butt-jointed edge sealing method requires overlapping edge sealing components on the outer edge of the membrane. Sealing according to this method will reduce the width of the middle layer of film that can be filled, which will make it difficult to assemble the membrane. Therefore, the Y-type butt-jointed edge sealing method is difficult to meet the requirements of narrow edge sealing.

[0074] If edge sealing adhesive is used, the exposed edge should be transparent, while traditional opaque milky white curing adhesive cannot meet the edge sealing requirements of dimming door glass. Curing adhesive also takes a long time to process and requires baking, resulting in slow production cycles and significantly higher production costs than other edge sealing methods. If the edge sealing material is bonded using tape, the tape will subsequently become a migration channel for the plasticizer in the adhesive layer of the dimming glass. In other words, the plasticizer in the adhesive layer of the dimming glass can easily migrate through the tape to the dimming layer, thereby affecting the service life of the dimming film.

[0075] In addition, although the U-shaped edge sealing method can achieve narrow edge sealing, when the U-shape is pasted, the edge sealing material at the curved edge (i.e., the R-angle arc edge) is prone to wrinkles, and tiny intrusion channels are easily formed at the wrinkled position. When in use, external environmental substances will erode the dimming film through the intrusion channel, thereby affecting the edge sealing quality.

[0076] In response to the problems of the narrow edge sealing width of the above-mentioned dimming film, high edge sealing cost, slow processing, unsightly edge sealing, and poor edge sealing effect, the present invention provides a dimming film and its edge sealing method, dimming glass, and vehicle, which can effectively reduce the edge sealing width and improve the edge sealing quality. In addition, it can also reduce the edge sealing cost, improve the edge sealing efficiency, and ensure the aesthetics of the edge sealing.

[0077] Please refer to the comprehensive Figures 1 to 6In the embodiment of the present application, a dimming film 4 is provided. The dimming film 4 may include: a film body 40, the film body 40 includes: a first substrate layer 41, a dimming layer 43 and a second substrate layer 45, the first substrate layer 41 has a first surface 411 away from the dimming layer 43 and a second surface 412 close to the dimming layer 43, the second surface 412 is provided with a first conductive layer 42; the second substrate layer 45 has a third surface 453 close to the dimming layer 43 and a fourth surface 454 away from the dimming layer 43, the third surface 453 is provided with a second conductive layer 44; an edge sealing component 8, the edge sealing component 8 is wrapped in At the edge of the diaphragm body 40, the wrapping path of the edge sealing component 8 is consistent with the contour of the diaphragm body 40. In the thickness direction of the diaphragm body 40, the edge sealing component 8 covers the dimming layer 43 and extends to the first substrate layer 41 and the second substrate layer 45; the edge sealing component 8 and the side edges of the first substrate layer 41 and the second substrate layer 45 are melted and fixed to form a circumferentially closed barrier structure 80, or the edge sealing component 8 and the first surface 411 and the fourth surface 454 close to the side edges of the first substrate layer 41 and the second substrate layer 45 are melted and fixed to form a circumferentially closed barrier structure 80.

[0078] In this embodiment, the dimming film 4 can mainly include a film body 40 and an edge sealing component 8 arranged around the edge of the film body 40. Figure 1 As shown, the diaphragm body 40 may mainly include a first base material layer 41 , a first conductive layer 42 , a dimming layer 43 , a second conductive layer 44 and a second base material layer 45 .

[0079] In this embodiment, the specific form of the dimming film 4 provided with the dimming layer 43 may include, but is not limited to, PDLC (Polymer Dispersed Liquid Crystal), SPD (Solid-State Polymer Dispersed Liquid Crystal), EC (Electrochromic), LC (Liquid Crystal), etc. Of course, the specific form of the dimming film 4 may also be other forms and is not limited to the above description. Persons skilled in the art may make other changes based on the technical essence of this application. However, as long as the functions and effects achieved are the same or similar to those of this application, they shall be covered by the scope of protection of this application.

[0080] The dimming film 4 can be used in dimming glass to meet the user's dimming needs for dimming glass. In the embodiment of the present application, the dimming film 4 mainly includes: a first substrate layer 41 provided with a first conductive layer 42, a dimming layer 43, and a second substrate layer 45 provided with a second conductive layer 44. The dimming layer 43 includes but is not limited to a liquid crystal layer, such as PDLC, SPD, LC, and EC.

[0081] The first substrate layer 41 has a first surface 411 away from the dimming layer 43 and a second surface 412 close to the dimming layer 43 . The first conductive layer 42 is disposed on the second surface 412 of the first substrate.

[0082] The material of the first substrate layer 41 can specifically be PET (polyethylene terephthalate). In addition, the material of the first substrate layer 41 can also be other materials such as PC (polycarbonate), PMMA (polymethyl methacrylate), PVC (polyvinyl chloride), TAC (triacetyl cellulose), etc. In the embodiments of the present application, the first substrate layer 41 is mainly described as PET.

[0083] The first conductive layer 42 can be provided on the surface of the first substrate layer 41 by coating. Of course, the first conductive layer 42 can also be provided on the surface of the first substrate layer 41 by other methods, such as vacuum coating or printing. The material of the first conductive layer 42 can be selected from metal oxide materials and conductive polymer materials. Specifically, the material of the first conductive layer 42 can be selected from indium tin oxide (ITO). Indium tin oxide (ITO): It is a transparent conductive oxide with good transparency and conductivity. It has a high transmittance in the visible light range and can provide good conductive properties, so that the dimming film can maintain a high transparency while realizing the dimming function.

[0084] The second substrate layer 45 has a third surface 453 close to the dimming layer 43 and a fourth surface 454 away from the dimming layer 43. The second conductive layer 44 is arranged on the third surface 453. The material of the second substrate layer 45 can be the same as that of the first substrate layer 41, or of course it can be different. Specifically, the material of the second substrate layer 45 can be PET (polyethylene terephthalate). In addition, the material of the second substrate layer 45 can also be other materials such as PC (polycarbonate), PMMA (polymethyl methacrylate), PVC (polyvinyl chloride), TAC (triacetyl cellulose), etc. In the embodiments of the present application, the second substrate layer 45 is mainly PET as an example for illustration.

[0085] The second conductive layer 44 can be provided on the surface of the second substrate layer 45 by coating. Of course, the second conductive layer 44 can also be provided on the surface of the second substrate layer 45 by other methods, such as vacuum coating or printing. The material of the second conductive layer 44 can be selected from metal oxide materials and conductive polymer materials. Specifically, the material of the second conductive layer 44 can be selected from indium tin oxide (ITO). In the embodiments of the present application, the first conductive layer 42 and the second conductive layer 44 are mainly illustrated by using ITO as an example.

[0086] The dimming film 4 provided in the embodiment of the present application takes the dimming film 4 as an example of PDLC. When in use, an AC voltage is connected to the first conductive layer 42 and the second conductive layer 44 to form an electric field, so that the liquid crystal molecules in the middle dimming layer 43 are deflected, thereby realizing the dimming function.

[0087] In this embodiment, the edge sealing component 8 is used to wrap around the edge of the diaphragm body 40 , and the wrapping path of the edge sealing component 8 is consistent with the contour of the diaphragm body 40 .

[0088] like Figure 2 As shown, specifically, the edge sealing component 8 includes at least one edge sealing strip 801, and the edge sealing strip 801 is a long strip structure with a predetermined width and thickness. The sum of the lengths of at least one edge sealing strip 801 is equal to or close to the outer contour circumference of the diaphragm body 40.

[0089] For example, when the edge-sealing component 8 includes a single edge-sealing strip 801, the length of the edge-sealing strip 801 is equal to or close to the outer perimeter of the diaphragm body 40. When the edge-sealing strip 801 includes two or more edge-sealing strips 801, the sum of the lengths of the plurality of edge-sealing strips 801 is equal to or close to the outer perimeter of the diaphragm body 40. Overall, the edge-sealing strip 801 can completely wrap around the outer perimeter of the edge of the diaphragm body 40, thereby sealing the outer perimeter of the dimming layer 43.

[0090] For the edge sealing component 8 in the form of an edge sealing strip 801, in theory, the fewer the number of edge sealing strips 801, the better, and the number of edge sealing strips 801 can be one. When the number of edge sealing strips 801 is integrated, the docking steps between the ends of the edge sealing strips 801 can be effectively reduced, the process can be simplified, the edge sealing cost can be reduced, and the edge sealing reliability can be improved. Alternatively, in one embodiment, the edge sealing component 8 can include an edge sealing ring, and the length of the edge sealing ring after expansion can be the same as the outer contour of the edge of the diaphragm body 40. Taking into account the high dimensional accuracy requirements for controlling the edge sealing ring during actual processing, the embodiment of the present application is mainly illustrated by taking the edge sealing strip 801 as an example. Taking the edge sealing strip 801 as an example, its expanded state has relative length, width and thickness dimensions.

[0091] The width of the edge sealing component 8 is greater than the thickness of the dimming layer 43 . The edge sealing component 8 covers the dimming layer 43 at both ends in the width direction (ie, the thickness direction of the diaphragm body 40 ) and extends to the first substrate layer 41 and the second substrate layer 45 .

[0092] like Figure 3 and Figure 5 As shown, the edge sealing member 8 has a first side (inner side) relatively close to the dimming layer 43 and a second side (outer side) relatively far from the dimming layer 43. On the inner side, the edge sealing member 8 is fused and fixed to the side edges of the first substrate layer 41 and the second substrate layer 45 to form a circumferentially closed barrier structure 80. Alternatively, the edge sealing member 8 is fused and fixed to the first surface 411 and the fourth surface 454 on the inner side at least near the side edges of the first substrate layer 41 and the second substrate layer 45 to form a circumferentially closed barrier structure 80. By forming a circumferentially closed barrier structure 80 on the inner side of the edge sealing member 8 and the side edges or surfaces near the side edges of the first substrate layer 41 and the second substrate layer 45 of the diaphragm body 40, the edge sealing width can be effectively controlled, achieving a narrow edge sealing effect and ensuring an aesthetically pleasing edge sealing. Furthermore, the provision of the barrier structure 80 effectively protects the intermediate active material layer (i.e., the dimming layer 43) of the dimming diaphragm 4 from erosion by external environmental substances, thereby improving the edge sealing quality.

[0093] When the barrier structure 80 is located between the edge sealing component 8 and the side edge of the diaphragm body 40, the corresponding welding edge sealing method is side welding edge sealing; when the barrier structure 80 is located between the edge sealing component 8 and the first surface 411 and the fourth surface 454 close to the side edges of the first substrate layer 41 and the second substrate layer 45, the corresponding welding sealing method is surface welding edge sealing.

[0094] The barrier structure 80 can be formed by laser welding. Laser welding can ensure good edge sealing stability and achieve a narrow edge sealing effect, which improves aesthetics. Laser processing is fast and does not require further processing steps such as heat curing, which can effectively reduce edge sealing costs and improve edge sealing efficiency.

[0095] like Figure 3 and Figure 4 As shown, in one embodiment, the barrier structure 80 is located at the side of the diaphragm body 40, and the barrier structure 80 is a line welding structure that follows the outer contour of the diaphragm body 40; or Figure 5 and Figure 6As shown, the barrier structure 80 is located near the first surface 411 and the fourth surface 454 of the side edges of the first substrate layer 41 and the second substrate layer 45 . The barrier structure 80 is a line-welded structure that follows the R-angle profile of the diaphragm body 40 .

[0096] When the barrier structure 80 is located on the side edge of the diaphragm body 40, specifically, the barrier structure 80 can be a wire-welded structure that follows the outer contour of the diaphragm body 40. By forming this wire-welded structure that follows the outer contour of the diaphragm body 40, a closed barrier structure 80 can be formed around the periphery of the diaphragm body 40, preventing the formation of erosion channels that connect to the outside, reliably ensuring the reliability of the dimming layer 43, and extending the service life of the dimming diaphragm 4. Furthermore, due to the formation of this wire-welded structure, the R-angle position can be completely sealed, and even if wrinkles occur, no tiny erosion channels will exist.

[0097] Specifically, taking laser welding as an example, the edge sealing material at the R corner position has been welded and melted together with the base material on the surface of the dimming film according to the laser processing path (the entire R corner arc). The complete welding and melting path has completely sealed both sides of the R corner, and a barrier structure 80 has been formed. At this time, even if wrinkles appear at the R corner position, external environmental substances cannot invade the edge and interior of the dimming film 4.

[0098] When the barrier structure 80 is located at the side edges of the first substrate layer 41 and the second substrate layer 45 , the barrier structure 80 includes: a first welding portion 81 arranged between the first side of the edge sealing component 8 and the side edge of the first substrate layer 41 , and a second welding portion 82 arranged between the first side of the edge sealing component 8 and the side edge of the second substrate layer 45 .

[0099] In addition, when the barrier structure 80 is provided on the side of the film body 40, the width of the edge sealing component 8 can be controlled within a very small size range. Specifically, the width of the edge sealing component 8 can be the same as or close to the thickness of the dimming film 4. Figure 3 、 Figure 4 and Figure 9 Specifically, when the barrier structure 80 is positioned at the side edges of the first substrate layer 41 and the second substrate layer 45, the width of the edge sealing component 8 exceeds the thickness of the film body 40 by a dimension H, where H is ≤ 2 mm. During side welding, it is sufficient to ensure that the edge sealing component 8 fully covers the edge cross-section of the switchable film. This H can be controlled within a relatively small range and can be 0 or even a negative number, thereby enabling the edge sealing width to be controlled within an extremely narrow range. Utilizing this barrier structure 80, the aesthetics of the edge sealing can be reliably guaranteed, particularly for switchable door glass, enabling an extremely narrow edge sealing width to meet the edge sealing requirements of switchable door glass.

[0100] like Figure 5 、 Figure 6 and Figure 8 As shown, when the barrier structure 80 is located near the first surface 411 and the fourth surface 454 of the side portions of the first substrate layer 41 and the second substrate layer 45, specifically, the barrier structure 80 is a line welding structure that is contoured along the R-angle profile of the diaphragm body 40. By forming the above-mentioned line welding structure that is contoured along the R-angle profile of the diaphragm body 40, a closed barrier structure 80 can be formed on the periphery of the diaphragm body 40, thereby avoiding the formation of an erosion channel connected to the outside, reliably ensuring the reliability of the dimming layer 43, and extending the service life of the dimming diaphragm 4.

[0101] When the barrier structure 80 is located near the first surface 411 and the fourth surface 454 of the side edges of the first substrate layer 41 and the second substrate layer 45, the barrier structure 80 includes: a first welding portion 81 arranged between the first side of the edge sealing component 8 and the first surface 411 and a second welding portion 82 arranged between the first side of the edge sealing component 8 and the second surface 412.

[0102] In addition, if Figure 8 As shown, when the barrier structure 80 is located near the first surface 411 and the fourth surface 454 of the side edges of the first substrate layer 41 and the second substrate layer 45, the edge sealing component 8 exceeds the thickness of the diaphragm body 40 in the width direction by dimensions H1 and H2, with H1 and H2 respectively ranging from 2 mm to 200 mm, to ensure that the edge of the diaphragm body 40 can be completely wrapped by the edge sealing component 8 to form an edge sealing structure. The edge sealing structure is a collective term for the edge sealing component 8 and the barrier structure 80.

[0103] In one embodiment, the width W of the edge sealing component 8, the thickness w of the diaphragm body 40, the dimension H1 of the edge sealing component 8 exceeding the first surface 411 of the first substrate layer 41 in the width direction, and the dimension H2 of the edge sealing component 8 exceeding the fourth surface 454 of the second substrate layer 45 in the width direction satisfy the following relationship: W=H1+H2+w, where W is between 400μm and 400mm.

[0104] Specifically, the width W of the edge-sealing component 8 can vary depending on the actual thickness of the dimming film 4, thereby accommodating dimming films of varying thicknesses. Taking PDLC dimming film as an example, the thicker the substrate layer / liquid crystal layer of the PDLC film, the wider the edge-sealing strip 801 needs to be to ensure that the edge of the dimming film is completely wrapped by the edge-sealing strip 801 to form an edge-sealed structure during surface laser welding.

[0105] When selecting materials, transparent materials with water-, oxygen-, and plasticizer-resistant properties are preferred for edge banding 801. Furthermore, to ensure the reliability of edge banding 8 during laser welding, the material must be able to withstand temperatures of 150°C for at least one hour without cracking or wrinkling. This ensures that laser welding can reliably fuse edge banding 8 with first and second substrate layers 41, 45, forming a barrier structure 80.

[0106] In one embodiment, when the barrier structure 80 is located on the side edges of the first substrate layer 41 and the second substrate layer 45, the edge sealing component 8 is made of any of the following materials: transparent plastic or opaque material. Specifically, when the edge sealing component 8 comprises an edge banding 801, the edge banding 801 can be made of plastics such as PET (polyethylene terephthalate) and PI (polyimide), or metal foils such as tin foil or copper foil. Overall, the edge banding 801 is inexpensive and easy to process, resulting in low material and manufacturing costs.

[0107] Alternatively, in another embodiment, when the barrier structure 80 is located near the first surface 411 and the fourth surface 454 of the side edges of the first substrate layer 41 and the second substrate layer 45, the edge sealing member 8 may be made of a bendable, tough transparent plastic, thereby facilitating bending of the edge sealing member 8 at both ends extending beyond the thickness of the diaphragm body 40 in the width direction toward the first surface 411 and the fourth surface 454, respectively. Specifically, when the edge sealing member 8 comprises an edge sealing strip 801, the material of the edge sealing strip 801 may include, but is not limited to, polyester, polyethyleneimine, and other transparent plastics.

[0108] In one embodiment, when the barrier structure 80 is located at the side edges of the first substrate layer 41 and the second substrate layer 45, the thickness of the edge sealing component 8 is between 10 μm and 400 μm; alternatively, when the barrier structure 80 is located near the first surface 411 and the fourth surface 454 of the side edges of the first substrate layer 41 and the second substrate layer 45, the thickness of the edge sealing component 8 is between 20 μm and 100 μm.

[0109] The width of the side weld edge sealing is directly related to the thickness of the edge sealing strip 801 material: since the black edge width of many automotive glass products is relatively narrow (especially door glass products), such products require narrow edge sealing of the dimming film 4.

[0110] When laser side welding is used for edge sealing, the thickness of edge banding strip 801 is equal to the width of the edge band, so it can basically meet the requirements of extremely narrow edge banding. The thickness of edge banding strip 801 for side welding edge sealing is defined as 10μm to 400μm. Taking into account the operational convenience, workability, material cost, and energy consumption during actual processing, the preferred thickness of edge banding strip 801 is 50μm to 100μm.

[0111] When surface laser welding is convenient, the edge banding width is H+D+d. The width of the edge banding strip 801 exceeding the thickness of the diaphragm body 40 in the width direction is H, the distance from the bend of the edge banding strip 801 to the edge of the diaphragm body 40 is D, and the thickness of the edge banding strip 801 is d.

[0112] The thickness d of edge banding 801 slightly affects the total width of the edge banding. Furthermore, the thickness of the edge banding material directly affects the bending flexibility of edge banding 801. When edge banding 801 is too thick, it becomes difficult to bend, which also affects the value of D, and thus the width of the edge banding. Therefore, the thickness of edge banding 801 selected for surface laser welding can be 20 μm to 100 μm, with a preferred thickness of 20 μm to 50 μm.

[0113] In one embodiment, when the barrier structure 80 is located near the first surface 411 and the fourth surface 454 of the side edges of the first substrate layer 41 and the second substrate layer 45, the distance between the bending position of the edge sealing component 8 and the side edges of the first substrate layer 41 and the second substrate layer 45 is within 10 mm.

[0114] Taking surface laser welding edge sealing as an example, the distance D from the bend of edge banding 801 to the edge of diaphragm body 40 is allowed to be 0 to 10 mm. Specifically, the value of D depends on the thickness and bending flexibility of edge banding 801. The smaller the thickness and the better the flexibility, the smaller D can be. When the thickness d of edge banding 801 is 20 to 50 μm, D can be close to 0.

[0115] Please refer to Figure 7 As shown, a dimming glass is also provided in the embodiment of the present application, and the dimming glass mainly includes the above-mentioned dimming film 4. The dimming glass can achieve the technical effect achieved by the dimming film 4 embodiment by setting the dimming film 4. For details, please refer to the specific description of the above-mentioned embodiment, and this application will not repeat it here.

[0116] Furthermore, the dimming glass may also include: the dimming glass also includes: an outer glass 1 and an inner glass 6, the outer glass 1 is connected to the dimming film 4 through a first adhesive layer 2, and the inner glass 6 is connected to the dimming film 4 through a second adhesive layer 5, the dimming glass also includes: a shielding area 7, the shielding area 7 is arranged in a predetermined outer area between the first adhesive layer 2 and the outer glass 1, and a predetermined outer ring area between the second adhesive layer 5 and the inner glass 6.

[0117] In this embodiment, the switchable glass may include an outer glass 1, a first adhesive layer 2, a switchable film 4, a second adhesive layer 5, and an inner glass 6 which are stacked in sequence from the inside out.

[0118] In the embodiments of the present application, the application of the smart glass in a vehicle (especially a smart electric vehicle) is mainly used as an example for illustration. When the smart glass is used in other scenarios, this application can be used as a reference.

[0119] The outer glass 1 must meet predetermined transmittance requirements. Specifically, the transmittance of the outer glass 1 must be greater than 70%. Specifically, the outer glass 1 can have a color combination of SG / G / C (dark green / green / transparent), any combination of the three, not limited to the inner or outer order. The outer glass 1 has opposing first and second surfaces 411, 412. The first surface 411 is the outer surface in contact with the vehicle's exterior, while the second surface 412 is used for bonding the first adhesive layer 2.

[0120] The material of the first adhesive layer 2 can be any one of the following: PVB (polyvinyl butyral), EVA (ethylene-vinyl acetate copolymer), TPU (thermoplastic polyurethane elastomer), SGP (ionic interlayer) and other adhesive films.

[0121] The inner glass 6 must meet predetermined transmittance requirements. Specifically, the transmittance of the inner glass 6 must be greater than 70%. Specifically, the glass color composition of the inner glass 6 can be: SG / G / C (dark green / green / transparent), any combination of the three, not limited to the inner and outer order. The inner glass 6 has opposing third and fourth surfaces 453 and 454. The fourth surface 454 is the inner surface that contacts the vehicle interior, while the third surface 453 is used for bonding the second adhesive layer 5.

[0122] The material of the second adhesive layer 5 can be selected from any one of the following: PVB (polyvinyl butyral), EVA (ethylene-vinyl acetate copolymer), TPU (thermoplastic polyurethane elastomer), SGP (ionic interlayer) and other adhesive films.

[0123] The outline dimensions of the dimming film 4 are smaller than those of the outer glass 1 and the inner glass 6. A filler area is formed between the outer contour of the dimming film 4 and the outer contours of the outer glass 1 and the inner glass 6, and the adhesive filler layer fills this filler area. The thickness of the adhesive filler layer is the same as or substantially the same as that of the dimming film 4. The adhesive filler layer surrounds the outer periphery of the dimming film 4, providing a circumferential seal around the dimming film 4.

[0124] The material of the adhesive filling layer can be any one of the following: PVB (polyvinyl butyral), EVA (ethylene-vinyl acetate copolymer), TPU (thermoplastic polyurethane elastomer), SGP (ionic interlayer) and other adhesive films.

[0125] The shielding area 7 is provided at a predetermined peripheral area between the first adhesive layer 2 and the outer glass 1, and at a predetermined outer ring area between the second adhesive layer 5 and the inner glass 6. The shielding area 7 is provided at the edge of the switchable glass to shield the edge sealing component 8, thereby ensuring the overall neatness and aesthetics of the switchable glass.

[0126] Please combine Figures 6 to 8 Specifically, the width of the edge sealing member 8 exceeds the thickness (H1\H2) of the diaphragm body 40, the distance D from the curved portion of the edge sealing member 8 to the side edges of the first substrate layer 41 and the second substrate layer 45, and the width L of the shielding area 7 of the switchable glass. The thickness d of the edge sealing member 8 satisfies the following relationship: H+D+d+5mm≤L. When the dimensions of the sealing member satisfy this relationship, the edge sealing area can be reliably prevented from extending beyond the black border and into the visible area of the glass.

[0127] A vehicle is also provided in an embodiment of the present application, and the above-mentioned dimming glass is provided on the doors and windows of the vehicle. By providing the above-mentioned dimming glass, the vehicle can achieve the technical effect achieved by the dimming glass embodiment. For details, please refer to the specific description of the above-mentioned embodiment, and this application will not repeat it here.

[0128] Furthermore, the vehicle includes any one of the following or a combination thereof: a dimming sunroof, a dimming rear bumper, dimming door glass, dimming side windows, and dimming corner windows. Any one of the dimming sunroof, dimming rear bumper, dimming door glass, dimming side windows, and dimming corner windows or a combination thereof is provided with the dimming glass, thereby achieving a narrow edge sealing effect. In particular, for the dimming door glass, since the solution provided in the embodiment of the present application can directly seal the side edges of the diaphragm body 40 of the dimming diaphragm 4, an extremely narrow edge sealing can be achieved, meeting the requirements of aesthetics.

[0129] Please refer to Figure 9 and Figure 10As shown, in an embodiment of the present application, a method for sealing an edge of a dimming film is further provided. The dimming film 4 includes: a film body 40, the film body 40 including: a first substrate layer 41, a dimming layer 43, and a second substrate layer 45. The first substrate layer 41 has a first surface 411 away from the dimming layer 43 and a second surface 412 close to the dimming layer 43, and the second surface 412 is provided with a first conductive layer 42; the second substrate layer 45 has a third surface 453 close to the dimming layer 43 and a fourth surface 454 away from the dimming layer 43, and the third surface 453 is provided with a second conductive layer 44. The method for sealing an edge of the dimming film includes the following steps:

[0130] Step S10: Align the edge strip 801 with the edge of the membrane body 40 so that 1 / 3 to 1 / 2 of the width of the edge strip 801 covers the edge of the first surface 411;

[0131] Step S12: welding the edge banding strip 801 to the edge of the first surface 411 according to a preset trajectory to form a first welding portion 81;

[0132] Step S14: Turning over the membrane body 40 , and bending the edge banding 801 to cover the edge of the fourth surface 454 ;

[0133] Step S16 : welding the edge banding strip 801 to the edge of the fourth surface 454 according to a preset trajectory to form a second welding portion 82 . The first welding portion 81 and the second welding portion 82 form a barrier structure 80 that isolates the dimming layer 43 .

[0134] Before the step S12 of forming the first welding portion 81, the edge sealing method of the dimming diaphragm further includes the following steps: Step S11: setting welding points between the edge sealing strip 801 and the edge of the first surface 411 and the edge of the fourth surface 454, and pre-positioning them by spot welding. Of course, the method of pre-positioning the edge sealing strip 801 with the edge of the first surface 411 and the edge of the fourth surface 454 is not limited to the above-mentioned spot welding method. For example, it can also be done with the help of a pre-positioning tool. Relatively speaking, when pre-positioning is performed by spot welding, the pre-positioning tool can be omitted; the operation is convenient, and the step of switching the workstation of the pre-positioning tool is omitted; the fault tolerance rate is high. When the position of the local welding point does not meet the requirements, the edge sealing strip 801 and the diaphragm body 40 can be separated at the welding point and re-welded.

[0135] In this embodiment, surface laser welding is taken as an example, and an edge banding strip 801 with a predetermined length is selected as the edge banding material. The overall shape of the edge banding strip 801 is a copy of the edge of the dimming film 4 .

[0136] The shapes of laser welding may include any one of the following or a combination thereof: spot welding, line segment welding, wavy line welding, circular welding, square welding, contour-profiling line welding of the outer contour of the dimming diaphragm 4, etc.

[0137] The peel strength ranking for edge banding 801 is: (wavy) line welding > circular / square welding > line segment welding > spot welding; the processing speed ranking is: spot welding > line segment welding > circular / square welding ≈ (wavy) line welding. The specific welding method should be determined by comprehensively considering the selected welding method, the required peel strength, and the processing efficiency requirements. Generally, spot welding can meet the peel strength requirements for edge banding 801 during the transportation and handling of dimming film. Considering processing efficiency, spot welding is the preferred method for surface / through-type laser welding.

[0138] Furthermore, when using surface laser welding for edge sealing, in order to avoid the influence of wrinkles on the edge banding strip 801 at the R corner position of the dimming film, a line welding shape along the R corner contour is used for edge sealing to ensure that the complete line welding melting path has completely sealed both sides of the R corner, thereby ensuring the quality of the edge sealing.

[0139] Furthermore, with the exception of the contoured welds along the outer contour of the dimming film 4, the spacing between laser welded segments for other shapes ranges from 1 to 700 mm. The specific spacing between weld points is determined by the required peel strength of the edge banding 801 and the total processing time. Specifically, the smaller the distance between weld points, the greater the number of weld points for a dimming film of the same circumference, and thus the higher the overall peel strength of the edge banding 801. The opposite is true for processing time: the smaller the distance between weld points, the greater the number of weld points and the longer the total welding process time.

[0140] The method of forming the first welding portion 81 and the second welding portion 82 and setting the welding points includes laser welding. When the length of the edge banding strip 801 is greater than 500 mm, the welding point spacing is controlled to be between 100 mm and 200 mm, for example, it can be 100 mm or 200 mm; when the length of the edge banding strip 801 is between 200 mm and 500 mm, the welding point spacing is controlled to be between 50 mm and 100 mm, for example, it can be 50 mm or 100 mm; when the length of the edge banding strip 801 is within 200 mm, the welding point spacing is controlled to be between 10 mm and 50 mm, for example, it can be 10 mm, 30 mm or 50 mm.

[0141] Furthermore, when surface laser welding is adopted, the distance between the welding points of the above-mentioned shapes and the outer contour of the dimming film 4 should be 10 to 200 mm.

[0142] After selecting the edge banding strip 801, the dimming film 4 can be placed first. At this time, the upper surface of the dimming film 4 is the first surface 411. The edge banding strip 801 is placed in alignment with the edge of the first surface 411, that is, 1 / 3 to 1 / 2 of the width of the edge banding needs to cover the edge of the first surface 411; the corresponding laser welding processing CAD drawing is input into the laser equipment, and the laser equipment welds the edge banding strip 801 to the edge of the first surface 411 according to the processing position in the CAD drawing to form a first welding part 81.

[0143] The dimming film 4 is then turned over, and the edge banding 801 is bent to cover the edge of the fourth surface 454 originally located below the dimming film 4. The edge banding 801 is then welded to the edge of the fourth surface 454 at specific points to form a second welded portion 82. At this point, the edge banding 801 completely wraps around the edge of the film body 40 of the dimming film 4.

[0144] When the dimming glass is assembled, vacuum will be applied. The edge sealing strip 801 will be tightly attached to the edge of the film body 40 due to the strong negative pressure between it and the dimming film 4, which can further strengthen the purpose of protecting the active material layer in the middle of the dimming film from being eroded by external environmental substances. The edge sealing strip 801 forms a more effective barrier structure 80.

[0145] Here, H+d+D is the total edge width of the switchable film. Selecting an edge strip 801 with appropriately sized H and d can achieve a narrower edge. When d is small (20μm<d≤75μm), the edge strip 801 is thinner and relatively easy to bend. In this case, the edge strip 801 will not warp excessively when bent, and the edge strip 801 can completely wrap around the edge of the film body 40 and be in close contact with the first surface 411 and fourth surface 454 of the switchable film 4. In this case, H can be ≥2mm. When 75<d≤100μm, the edge strip 801 is difficult to bend, so H is required to be ≥3mm. The size of H increases with d. d is preferably 20 to 50μm.

[0146] For surface laser welding edge sealing, since only one side of the edge band 801 is welded to one side of the dimming film, the laser energy is relatively weak and does not damage the intermediate active material layer of the dimming film 4. In addition, surface laser welding is less difficult, has better controllability, and a higher yield rate.

[0147] In another embodiment of the present application, a method for sealing an edge of a dimming film is provided. The dimming film 4 includes a film body 40, the film body 40 including a first substrate layer 41, a dimming layer 43, and a second substrate layer 45. The first substrate layer 41 has a first surface 411 away from the dimming layer 43 and a second surface 412 near the dimming layer 43, and the second surface 412 is provided with a first conductive layer 42; the second substrate layer 45 has a third surface 453 near the dimming layer 43 and a fourth surface 454 away from the dimming layer 43, and the second conductive layer 44 is provided on the third surface 453. The method for sealing an edge of the dimming film includes the following steps:

[0148] Place the edge banding 801 against the side of the diaphragm body 40;

[0149] The edge strip 801 is linearly welded to the first substrate layer 41 and the second substrate layer 45 along the outer contour path of the diaphragm body 40 , so that the edge strip 801 is welded and fixed to the side of the diaphragm body 40 to form a barrier structure 80 that isolates the dimming layer 43 .

[0150] When the edge banding strip 801 is welded to the side of the diaphragm body 40 , that is, when side welding is adopted, an edge banding strip 801 with a predetermined length can be selected as the edge banding material. The overall shape of the edge banding strip 801 is similar to the outer contour of the dimming diaphragm 4 .

[0151] During the specific operation, the dimming film 4 is first placed, and then the edge banding 801 is placed against the side of the film body 40. Laser welding is performed on the two substrate layers of the dimming film 4 (the first substrate layer 41 and the second substrate layer 45). The edge banding 801 is firmly welded to the side of the film body 40, forming a tightly closed barrier structure 80, which effectively protects the active material layer in the middle of the dimming film from corrosion by external substances. The edge width of the side welding laser edge banding is extremely narrow, and the edge width is only determined by the thickness d of the edge banding 801.

[0152] In this embodiment, the line welding method may be laser welding. Furthermore, the laser welding method is laser side welding. Overall, compared to surface laser welding, laser side welding results in a narrower edge seal area, no wrinkles, and a better edge seal appearance.

[0153] Laser welding edge sealing has good stability, fast laser processing speed, and does not require processing steps such as reheat curing. If conventional transparent PET material is used as edge banding strip 801, whether it is laser side welding edge sealing or surface laser welding edge sealing, it can achieve a transparent, beautiful and narrow edge sealing effect, and the cost of PET material is low.

[0154] It should be noted that, in the description of this application, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be understood to indicate or imply relative importance. Furthermore, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0155] The above-mentioned various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0156] The above are only a few embodiments of the present invention. Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any person skilled in the art of the present invention may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in the present invention. However, the scope of patent protection of the present invention shall still be based on the scope defined by the appended claims.

Claims

1. A dimming film, characterized in that: The dimming film comprises: a film body, the film body comprising: a first substrate layer, a dimming layer, and a second substrate layer, the first substrate layer having a first surface away from the dimming layer and a second surface close to the dimming layer, the second surface being provided with a first conductive layer; the second substrate layer having a third surface close to the dimming layer and a fourth surface away from the dimming layer, the third surface being provided with a second conductive layer; an edge sealing component, wherein the edge sealing component is wrapped around the edge of the diaphragm body, the wrapping path of the edge sealing component is consistent with the contour of the diaphragm body, and along the thickness direction of the diaphragm body, the edge sealing component covers the dimming layer and extends to the first substrate layer and the second substrate layer; The edge sealing component is melted and fixed to the side edges of the first substrate layer and the second substrate layer to form a circumferentially closed barrier structure, or the edge sealing component is melted and fixed to the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer to form a circumferentially closed barrier structure.

2. The dimming film according to claim 1, wherein: The barrier structure is located at the side of the diaphragm body, and the barrier structure is a line welding structure that follows the outer contour of the diaphragm body; or, The barrier structure is located on the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer. The barrier structure is a line welding structure that follows the R-angle profile of the diaphragm body.

3. The dimming film according to claim 1, wherein: The barrier structure is located at the side edges of the first substrate layer and the second substrate layer, and the material of the edge sealing component includes any one of the following: transparent plastic or opaque material; or The barrier structure is located on the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer. The material of the edge sealing component includes a transparent plastic with bendability and toughness.

4. The dimming film according to any one of claims 1 to 3, characterized in that: The barrier structure is located at the side edges of the first substrate layer and the second substrate layer, and the thickness of the edge sealing component is between 10 μm and 400 μm; or The barrier structure is located on the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer, and the edge sealing component has a thickness between 20 μm and 100 μm.

5. The dimming film according to any one of claims 1 to 3, characterized in that: The barrier structure is located on the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer, and the distance from the bending position of the edge sealing component to the side edges of the first substrate layer and the second substrate layer is within 10 mm.

6. The dimming film according to any one of claims 1 to 3, characterized in that: The barrier structure is located at the side edges of the first substrate layer and the second substrate layer, and along the thickness direction of the diaphragm body, the dimension of the edge sealing component exceeding the thickness of the diaphragm body is H, H≤2mm; or The barrier structure is located on the first surface and the fourth surface near the side edges of the first substrate layer and the second substrate layer. The dimension of the edge sealing component exceeding the thickness of the membrane body in the width direction is H, and H is between 2 mm and 200 mm.

7. The dimming film according to claim 6, wherein: The width W of the edge sealing component, the thickness w of the diaphragm body, the dimension H1 of the edge sealing component exceeding the first surface of the first substrate layer in the width direction, and the dimension H2 of the edge sealing component exceeding the fourth surface of the second substrate layer in the width direction satisfy the following relationship: W=H1+H2+w, where W is between 400μm and 400mm.

8. The dimming film according to claim 2, wherein: The barrier structure is located at the side edges of the first substrate layer and the second substrate layer, and the barrier structure includes: a first welding portion provided between the first side of the edge sealing component and the side edge of the first substrate layer, and a second welding portion provided between the first side of the edge sealing component and the side edge of the second substrate layer; or The barrier structure is located on the first surface and the fourth surface close to the side edges of the first substrate layer and the second substrate layer. The barrier structure includes a first welding portion provided between the first side of the edge sealing component and the first surface, and a second welding portion provided between the first side of the edge sealing component and the second surface.

9. A dimming glass, characterized in that: The switchable glass comprises the switchable film according to any one of claims 1 to 8.

10. The switchable glass according to claim 9, wherein: The switchable glass further comprises: an outer glass and an inner glass, wherein the outer glass is connected to the switchable film by a first adhesive layer, and the inner glass is connected to the switchable film by a second adhesive layer. The switchable glass further comprises: a shielding area, wherein the shielding area is provided in a predetermined peripheral area between the first adhesive layer and the outer glass, and in a predetermined outer ring area between the second adhesive layer and the inner glass. The edge sealing component exceeds the thickness H of the diaphragm body in the width direction, the distance D from the bending position of the edge sealing component to the side edges of the first substrate layer and the second substrate layer, and the width L of the shielding area of the dimming glass. The thickness d of the edge sealing component satisfies the following relationship: H+D+d+5mm≤L.

11. A vehicle, characterized in that: The vehicle comprises the switchable glass according to any one of claims 9 to 10.

12. A method for sealing an edge of a dimming film, characterized in that: The dimming film comprises: a film body, the film body comprising: a first substrate layer, a dimming layer, and a second substrate layer, the first substrate layer having a first surface away from the dimming layer and a second surface close to the dimming layer, the second surface being provided with a first conductive layer; the second substrate layer having a third surface close to the dimming layer and a fourth surface away from the dimming layer, the third surface being provided with a second conductive layer; the edge sealing method of the dimming film comprises the following steps: Align the edge strip with the edge of the membrane body so that 1 / 3 to 1 / 2 of the width of the edge strip covers the edge of the first surface; Welding the edge banding strip to the edge of the first surface according to a preset trajectory to form a first welding portion; Then, the membrane body is turned over, and the edge sealing strip is bent to cover the edge of the fourth surface; The edge banding is welded to the edge of the fourth surface according to a preset trajectory to form a second welding portion, and the first welding portion and the second welding portion form a barrier structure that isolates the dimming layer.

13. The edge sealing method of the dimming film according to claim 12, wherein: Before the step of forming the first welding portion, the edge sealing method of the dimming film further includes: setting welding points on the edge sealing strip and the edge of the first surface and the edge of the fourth surface, and pre-positioning them by spot welding.

14. The edge sealing method of the dimming film according to claim 13, wherein: The method of forming the first welding portion and the second welding portion and setting the welding point includes laser welding, When the length of the edge banding is more than 500 mm, the distance between the welding points is controlled to be between 100 mm and 200 mm; When the length of the edge banding is between 200 mm and 500 mm, the distance between the welding points is controlled to be between 50 mm and 100 mm; When the length of the edge banding is within 200 mm, the distance between the welding points is controlled to be between 10 mm and 50 mm.

15. A method for sealing the edge of a dimming film, characterized in that: The dimming film comprises: a film body, the film body comprising: a first substrate layer, a dimming layer, and a second substrate layer, the first substrate layer having a first surface away from the dimming layer and a second surface close to the dimming layer, the second surface being provided with a first conductive layer; the second substrate layer having a third surface close to the dimming layer and a fourth surface away from the dimming layer, the third surface being provided with a second conductive layer; the edge sealing method of the dimming film comprises the following steps: placing the edge sealing strip against the side of the diaphragm body; The edge banding is linearly welded to the first substrate layer and the second substrate layer along the outer contour path of the diaphragm body, so that the edge banding is welded and fixed to the side of the diaphragm body to form a barrier structure that isolates the dimming layer.

Images