Dimming glass assembly and preparation method thereof

Abstract

The embodiment of the present application provides a dimming glass component and a preparation method thereof, wherein the dimming glass component includes a dimming function layer, the dimming function layer includes at least one polymer dispersed liquid crystal film layer and at least one flexible dye liquid crystal film layer, when the power is on, the polymer dispersed liquid crystal film layer and the flexible dye liquid crystal film layer are both in a light-transmitting state, when the power is off, the polymer dispersed liquid crystal film layer is in a foggy state, and the flexible dye liquid crystal film layer is in a dark state. The embodiment of the present application achieves the technical effect that the dimming glass component has good light-shielding properties and visual perception in a non-light-transmitting state when the power is off.

Description

Technical Field

[0001] The present application relates to the technical field of dimming glass, and in particular to a dimming glass component and a preparation method thereof. Background Art

[0002] In order to better protect privacy when privacy is needed and not affect light transmission when privacy is not needed, more and more people choose electrically controlled dimming glass for various glasses in cars or buildings. Dimming glass, also known as electronic curtains, includes a dimming film layer. When the power is on, the liquid crystal molecules in the dimming film layer are arranged neatly, and the dimming glass is in a light-transmitting state; when the power is off, the liquid crystal molecules in the dimming film layer are irregularly scattered, and the dimming glass is in a light-opaque state, which can be applied to a variety of scenarios.

[0003] The existing dimming glass has a dimming film layer that controls light transmission and opacity. One type of dimming film layer is polymer dispersed liquid crystal. The existing polymer dispersed liquid crystal film is milky white. In the opaque state, it appears white and foggy, and the visual effect is poor. The other type of dimming film layer is flexible dye liquid crystal. When the existing flexible dye liquid crystal dimming film is used in a single layer, the transmittance is high in the opaque state. When double layers are used, obvious rainbow patterns will appear due to interference, affecting the visual effect. Summary of the invention

[0004] In view of the shortcomings of the existing methods, the present application proposes a dimming glass assembly and a preparation method thereof, so as to solve the technical problems of the prior art in that the light transmittance is high or the visual effect is poor in the opaque state.

[0005] In a first aspect, an embodiment of the present application provides a dimming glass assembly, comprising: a first glass substrate, a first adhesive layer, a dimming functional layer, a second adhesive layer, and a second glass substrate that are stacked;

[0006] The dimming functional layer includes at least one polymer dispersed liquid crystal film layer and at least one flexible dye liquid crystal film layer, which is used to be in a light-transmitting state when powered on, and when powered off, the polymer dispersed liquid crystal film layer is in a foggy state and the flexible dye liquid crystal film layer is in a dark state.

[0007] Optionally, the dimming glass assembly includes at least one of the following:

[0008] The dimming function layer comprises: a polymer dispersed liquid crystal film layer and two flexible dye liquid crystal film layers, wherein the two flexible dye liquid crystal film layers are respectively arranged on two sides of the polymer dispersed liquid crystal film layer; or, a polymer dispersed liquid crystal film layer and a flexible dye liquid crystal film layer are stacked;

[0009] The thickness of the polymer dispersed liquid crystal film layer ranges from 0.2 mm to 0.38 mm;

[0010] The thickness of the flexible dye liquid crystal film layer ranges from 0.2 mm to 0.38 mm;

[0011] The first glass substrate and the second glass substrate include flat glass, double-curved glass or single-curved glass.

[0012] Optionally, the dimming glass assembly further includes: a bonding structure;

[0013] Along a first direction perpendicular to the first glass substrate, the sides of the first glass substrate, the first adhesive layer, the second adhesive layer and the second glass substrate are all aligned;

[0014] Along a second direction parallel to the first glass substrate, there is a first distance between the side edge of the dimming functional layer and the side edge of the first glass substrate, and the first adhesive layer and a peripheral area corresponding to the first distance, the side peripheral wall of the dimming functional layer, and the second adhesive layer and a peripheral area corresponding to the first distance form a circumferential groove;

[0015] The bonding structure is arranged at the circumferential groove.

[0016] Optionally, the dimming glass assembly includes at least one of the following:

[0017] The bonding structure includes polyvinyl butyral or ethylene-vinyl acetate copolymer;

[0018] The first distance ranges from 10 to 30 mm.

[0019] Optionally, the polymer dispersed liquid crystal film layer includes a first substrate and a second substrate, and the flexible dye liquid crystal film layer includes a third substrate and a fourth substrate;

[0020] The dimming glass assembly further includes a first flexible circuit board, a second flexible circuit board, a third flexible circuit board and a fourth flexible circuit board, which are electrically connected to the conductive film layers on the first substrate, the second substrate, the third substrate and the fourth substrate respectively, and are all arranged on the same side of the dimming glass assembly;

[0021] There is a gap between the orthographic projections of the first flexible circuit board and the second flexible circuit board on the first surface and the orthographic projections of the third flexible circuit board and the fourth flexible circuit board on the first surface, the first surface is parallel to the first glass substrate, and the gap ranges from 10mm to 30mm.

[0022] Optionally, the dimming glass assembly further includes:

[0023] The dimming functional layer comprises one layer of the polymer dispersed liquid crystal film layer and two layers of the flexible dye liquid crystal film layers, and the two layers of the flexible dye liquid crystal film layers are respectively arranged on two sides of the polymer dispersed liquid crystal film layer;

[0024] The interval between the orthographic projections of the third flexible circuit board and the fourth flexible circuit board electrically connected to one layer of the flexible dye liquid crystal film layer on the first surface and the orthographic projections of the first flexible circuit board and the second flexible circuit board on the first surface is equal to the interval between the orthographic projections of the third flexible circuit board and the fourth flexible circuit board electrically connected to another layer of the flexible dye liquid crystal film layer on the first surface and the orthographic projections of the first flexible circuit board and the second flexible circuit board on the first surface.

[0025] Optionally, the dimming glass assembly includes dimming bulletproof glass, dimming non-tempered glass, dimming semi-tempered glass, dimming architectural curved glass, dimming skylight, dimming locomotive side window glass, dimming locomotive skylight glass, dimming rear windshield or dimming corner window glass.

[0026] In a second aspect, an embodiment of the present application provides a method for preparing a dimming glass assembly, which is used to prepare the dimming glass assembly provided in the first aspect of the present application, and the preparation method comprises:

[0027] Prepare a first adhesive layer covering the entire surface on one side of the first glass substrate;

[0028] At least one polymer dispersed liquid crystal film layer and at least one flexible dye liquid crystal film layer are prepared in the main area of ​​the first adhesive layer away from the first glass substrate to form a dimming functional layer, and a first distance exists between the side edge of the dimming functional layer and the side edge of the first glass substrate;

[0029] Prepare a second adhesive layer covering the entire surface on one side of the second glass substrate;

[0030] Adhere the main body area of ​​the second adhesive layer to the dimming functional layer, so that the peripheral area of ​​the first adhesive layer corresponding to the first distance, the side wall of the dimming functional layer and the peripheral area of ​​the second adhesive layer corresponding to the first distance form a circumferential groove;

[0031] Filling the bonding structure in the circumferential groove to obtain an initial dimming glass assembly;

[0032] The initial dimming glass assembly is subjected to a sheet-joining process to obtain a dimming glass assembly.

[0033] Optionally, after the bonding structure is filled in the circumferential groove to obtain an initial dimming glass assembly, and before the initial dimming glass assembly is assembled, the method further includes:

[0034] Using fixing pieces to fix the periphery of the initial dimming glass assembly;

[0035] The initial dimming glass assembly whose periphery is fixed by fixing members is arranged in a vacuum bag.

[0036] Optionally, the initial dimming glass assembly is subjected to a assembling process to obtain a dimming glass assembly, comprising:

[0037] Applying a design temperature range and a design pressure range to the initial dimming glass assembly whose periphery is fixed by fixing members in the vacuum bag;

[0038] removing the vacuum bag and the fixing member;

[0039] The initial dimming glass assembly is trimmed so that the first adhesive layer, the second adhesive layer, and the adhesive structure are flush with the outer sides of the first glass substrate and the second glass substrate.

[0040] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include:

[0041] The dimming glass assembly provided in the embodiment of the present application, the dimming functional layer includes at least one polymer dispersed liquid crystal film layer, which solves the problem of high light transmittance of the dimming glass assembly in a non-transparent state.

[0042] Moreover, the dimming function layer includes at least one layer of flexible dye liquid crystal film, which solves the technical problem of affecting the visual effect by appearing foggy in the opaque state. Specifically:

[0043] The dimming glass assembly provided in the embodiment of the present application includes a dimming functional layer, which includes at least one polymer dispersed liquid crystal film layer. When the power is on, the polymer dispersed liquid crystal film layer is in a light-transmitting state and does not affect the normal transmission of light. When the power is off, the polymer dispersed liquid crystal film layer is foggy, has high light-shielding properties and low light transmittance, and can ensure confidentiality.

[0044] Moreover, the dimming functional layer also includes at least one layer of flexible dye liquid crystal film layer. When the flexible dye liquid crystal film layer is powered on, it is in a light-transmitting state and does not affect the normal transmission of light. When the power is off, the flexible dye liquid crystal film layer is in a dark state and can be combined with the polymer dispersed liquid crystal film layer to achieve a black but not transparent effect and improve the visual experience.

[0045] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0047] Figure 1 A schematic diagram of the structure of a dimming glass assembly provided in an embodiment of the present application;

[0048] Figure 2 A schematic structural diagram of another dimming glass assembly provided in an embodiment of the present application;

[0049] Figure 3 A schematic structural diagram of another dimming glass assembly provided in an embodiment of the present application;

[0050] Figure 4 A schematic diagram of the structure of a groove area in a dimming glass assembly provided in an embodiment of the present application;

[0051] Figure 5 A schematic diagram of a configuration of a flexible circuit board in a dimming glass assembly provided in an embodiment of the present application;

[0052] Figure 6 A schematic top view of a configuration of a flexible circuit board in a dimming glass assembly provided in an embodiment of the present application;

[0053] Figure 7 A schematic diagram of another arrangement of a flexible circuit board in a dimming glass assembly provided in an embodiment of the present application;

[0054] Figure 8 A schematic top view of another arrangement of a flexible circuit board in a dimming glass assembly provided in an embodiment of the present application;

[0055] Fig. 9 A schematic flow chart of a method for preparing a dimming glass assembly provided in an embodiment of the present application.

[0056] The reference numerals of the accompanying drawings are explained as follows:

[0057] 1-Dimming glass components;

[0058] 101 - first glass substrate; 102 - first bonding layer; 103 - dimming function layer; 104 - second bonding layer; 105 - second glass substrate; 106 - bonding structure;

[0059] 1031-flexible dye liquid crystal film layer; 1032-PDLC film layer;

[0060] 107-groove; 1071-first distance;

[0061] 21 - third flexible circuit board; 22 - fourth flexible circuit board; 23 - first flexible circuit board; 24 - second flexible circuit board; 25 - spacer. DETAILED DESCRIPTION

[0062] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0063] It will be understood by those skilled in the art that, unless specifically stated, the singular forms "one", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the present technical field. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, the element may be directly connected or coupled to the other element, or may refer to the connection relationship between the element and the other element established through an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" may be implemented as "A", or as "B", or as "A and B".

[0064] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0065] First, several terms involved in this application are introduced and explained:

[0066] Polymer dispersed liquid crystal (PDLC) film is a light control film that disperses small molecule liquid crystal in the form of droplets in a polymer matrix. When power is on, the electric field can control the orientation of the optical axis of the liquid crystal droplets, thereby changing the effective refractive index of the liquid crystal droplets, so that the refractive index of the liquid crystal molecules matches the refractive index of the polymer matrix, allowing light to pass through, and the PDLC film appears in a light-transmitting state; when power is off, the optical axes of the liquid crystal droplets dispersed in the polymer matrix are in a randomly oriented state, and the refractive index does not match the refractive index of the polymer matrix, scattering external light, and the PDLC film appears as a turbid, opaque fog with poor visual effects.

[0067] Flexible dye liquid crystal film is also a light control film. It uses a flexible film as a substrate and encapsulates liquid dye liquid crystals together through a vacuum sealing device. It can achieve millisecond response when dimming. Under the existing liquid crystal technology, when using a single-layer flexible dye liquid crystal dimming film, the transmittance is relatively high, at 13% to 50%, which cannot play a good role in protecting privacy. However, if a double-layer film is used in a stacked manner, obvious rainbow patterns will appear due to the light interference of the two layers of flexible films, affecting the visual effect.

[0068] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above technical problems with specific embodiments. It should be noted that the following implementations can refer to, draw on or combine with each other, and the same terms, similar features and similar implementation steps in different implementations will not be described repeatedly.

[0069] The present application embodiment provides a dimming glass assembly 1, such as Figure 1 As shown, it includes: a first glass substrate 101, a first adhesive layer 102, a dimming function layer 103, a second adhesive layer 104 and a second glass substrate 105 which are stacked.

[0070] The dimming functional layer 103 includes at least one PDLC film layer 1032 and at least one flexible dye liquid crystal film layer 1031, which is used to be in a light-transmitting state when powered on, and when powered off, the PDLC film layer 1032 is in a foggy state and the flexible dye liquid crystal film layer 1031 is in a dark state.

[0071] In the dimming glass assembly 1 provided in the embodiment of the present application, the dimming function layer 103 includes at least one PDLC film layer 1032 , which solves the problem that the transmittance of the dimming glass assembly 1 is high in a non-transparent state.

[0072] Moreover, the dimming function layer 103 includes at least one flexible dye liquid crystal film layer 1031, which solves the technical problem of affecting the visual effect by appearing foggy in the opaque state. Specifically:

[0073] The dimming glass assembly 1 provided in the embodiment of the present application includes a dimming function layer 103, and the dimming function layer 103 includes at least one PDLC film layer 1032. When the power is on, the PDLC film layer 1032 is in a light-transmitting state and does not affect the normal transmission of light. When the power is off, the PDLC film layer 1032 is in a foggy state, with high light-shielding properties and low light transmittance, thereby ensuring confidentiality.

[0074] Moreover, the dimming functional layer 103 also includes at least one layer of flexible dye liquid crystal film layer 1031. When the flexible dye liquid crystal film layer 1031 is powered on, it is in a light-transmitting state and does not affect the normal transmission of light. When the power is off, the flexible dye liquid crystal film layer 1031 is in a dark state and can be combined with the PDLC film layer 1032 to achieve a black but not transparent effect, thereby improving the visual experience.

[0075] Optionally, the dimming functional layer 103 includes at least one PDLC film layer 1032 and at least one flexible dye liquid crystal film layer 1031. When powered on, the PDLC film layer 1032 and the flexible dye liquid crystal film layer 1031 are powered on at the same time, and when powered off, the PDLC film layer 1032 and the flexible dye liquid crystal film layer 1031 are powered off at the same time.

[0076] Optionally, when the power is off, the PDLC film layer 1032 is in a foggy state, including a white foggy state, with a low light transmittance, which can well protect privacy.

[0077] Optionally, when the power is off, the flexible dye liquid crystal film layer 1031 is in a dark state, including a black state with a high light transmittance, and the visual experience is better.

[0078] Optionally, when powered on, both the PDLC film layer 1032 and the flexible dye liquid crystal film layer 1031 are in a light-transmitting state, and the number of layers has little effect on the light-transmitting state.

[0079] In some embodiments, the switchable glass assembly 1 includes at least one of the following items.

[0080] like Figure 7 and Figure 8 As shown, the dimming functional layer 103 includes: a PDLC film layer 1032 and two flexible dye liquid crystal film layers 1031 a and 1031 b , and the two flexible dye liquid crystal film layers 1031 a and 1031 b are respectively arranged on two sides of the PDLC film layer 1032 .

[0081] or, as Figure 2 As shown, a PDLC film layer 1032 and a flexible dye liquid crystal film layer 1031 are stacked.

[0082] The thickness of the PDLC film layer 1032 ranges from 0.2 mm (millimeter) to 0.38 mm, and can be 0.2 mm or 0.38 mm.

[0083] The thickness of the flexible dye liquid crystal film layer 1031 ranges from 0.2 mm to 0.38 mm, and can be 0.2 mm or 0.38 mm.

[0084] The first glass substrate 101 and the second glass substrate 105 include flat glass, double-curved glass, or single-curved glass.

[0085] Optionally, the dimming functional layer 103 includes three layers of laminated flexible dye liquid crystal film layer 1031a, PDLC film layer 1032, and flexible dye liquid crystal film layer 1031b. The two flexible dye liquid crystal film layers 1031a and 1031b are respectively arranged on both sides of the PDLC film layer 1032 to avoid rainbow patterns due to interference when the two flexible dye liquid crystal film layers 1031a and 1031b are superimposed, and the visual effect is better.

[0086] Optionally, when the dimming functional layer 103 includes two layers of flexible dye liquid crystal film layers 1031a and 1031b, when the power is off, the dark state superposition increases the blackness. The blackness when using two layers of flexible dye liquid crystal film layers 1031a and 1031b is much higher than the blackness when using one layer of flexible dye liquid crystal film layer 1031, further improving the visual experience.

[0087] Optionally, the flexible dye liquid crystal film layer 1031a and the flexible dye liquid crystal film layer 1031b can be set during configuration, including flipping the flexible dye liquid crystal film layer 1031b upside down relative to the flexible dye liquid crystal film layer 1031a, so that the flexible dye liquid crystals of the flexible dye liquid crystal film layer 1031a and the flexible dye liquid crystal film layer 1031b are aligned perpendicular to each other.

[0088] Optionally, the flexible dye liquid crystal film layer 1031a and the flexible dye liquid crystal film layer 1031b have the same structure, and the production process is simpler, which can effectively improve the production efficiency.

[0089] Optionally, the dimming functional layer 103 includes two stacked film layers, namely a PDLC film layer 1032 and a flexible dye liquid crystal film layer 1031 , with low preparation cost, and can meet the requirements of low light transmittance and good visual effect when the power is off.

[0090] Optionally, the thickness of the PDLC film layer 1032 and the flexible dye liquid crystal film layer 1031 are both in the range of 0.2 mm to 0.38 mm, and can be 0.2 mm or 0.38 mm. Within this thickness range, wrinkles may be generated during the assembly process when the film layer is too thin, and the entirety of the dimming glass assembly 1 may be too thick or the bonding effect of the bonding layer may be poor when the film layer is too thick, thereby ensuring the appearance of the dimming glass assembly 1 and the smooth passage of light when powered on.

[0091] Optionally, to ensure the bonding effect of the bonding layer, the thickness of the bonding layer including the first bonding layer 102 and the second bonding layer 104 is not less than the thickness of the PDLC film layer 1032 and the flexible dye liquid crystal film layer 1031 , including being greater than or equal to 0.38 mm.

[0092] Optionally, the first glass substrate 101 and the second glass substrate 105 include flat glass, and applicable scenarios include building curtain wall glass and locomotive side window glass.

[0093] Alternatively, if Figure 3 As shown, the first glass substrate 101 and the second glass substrate 105 include hyperbolic glass, and applicable scenarios include automobile glass sunroofs and rear windshields, etc.

[0094] Optionally, the first glass substrate 101 and the second glass substrate 105 include single-curved glass, and applicable scenarios include side windows and corner windows of automobile glass, etc.

[0095] In some embodiments, the switchable glass assembly 1 further includes: a bonding structure 106 .

[0096] Along a first direction perpendicular to the first glass substrate 101 , the sides of the first glass substrate 101 , the first adhesive layer 102 , the second adhesive layer 104 , and the second glass substrate 105 are aligned.

[0097] Along the second direction parallel to the first glass substrate 101, there is a first distance 1071 between the side edge of the dimming function layer 103 and the side edge of the first glass substrate 101, and the first adhesive layer 102 and the peripheral area corresponding to the first distance 1071, the side wall of the dimming function layer 103, and the peripheral area of ​​the second adhesive layer 104 corresponding to the first distance 1071, such as Figure 4 As shown, a circumferential groove 107 is formed.

[0098] The bonding structure 106 is disposed at the circumferential groove 107 .

[0099] Optionally, the dimming functional layer 103 includes a polymer dispersed liquid crystal film layer 1032 and a flexible dye liquid crystal film layer 1031 , and the polymer dispersed liquid crystal film layer 1032 and the flexible dye liquid crystal film layer 1031 are of the same size and overlap exactly, including a first size.

[0100] Optionally, the first glass substrate 101 , the first adhesive layer 102 , the second adhesive layer 104 and the second glass substrate 105 are of the same size, including the second size.

[0101] Optionally, the first direction is a direction perpendicular to the first glass substrate 101 , the second direction is a direction parallel to the first glass substrate 101 , and the first direction and the second direction are perpendicular to each other.

[0102] Optionally, the first size is smaller than the second size, and the difference between the first size and the second size is manifested as a circumferential groove 107, and the groove 107 is manifested as being evenly distributed in the circumferential direction, that is, the peripheral distance between the first size and the second size is constant in the circumferential direction, which is a first distance 1071.

[0103] Optionally, the first direction is a direction perpendicular to the first glass substrate 101 , the second direction is a direction parallel to the first glass substrate 101 , and the first direction and the second direction are perpendicular to each other.

[0104] Optionally, the bonding structure 106 is arranged at the circumferential groove 107, including filling the groove 107, so that the edge sealing effect is better and the subsequent use of the dimming glass assembly 1 is more stable. Figure 1 shown.

[0105] Optionally, the adhesive structure 106 is not less than the first distance 1071 in the first direction and is not less than the distance of the dimming function layer 103 in the second direction, so that the adhesive structure 106 completely fills the groove 107 area behind the rear sheet.

[0106] In some embodiments, the switchable glass assembly 1 includes at least one of the following items.

[0107] The adhesive structure 106 includes polyvinyl butyral or ethylene vinyl acetate.

[0108] The first distance 1071 ranges from 10 mm to 30 mm, and may be 10 mm or 30 mm.

[0109] Optionally, the adhesive structure 106 includes polyvinyl butyral (PVB) or ethylene-vinyl acetate copolymer (EVA).

[0110] Optionally, the first distance 1071 ranges from 10 mm to 30 mm, so that after the adhesive structure 106 fills the rear groove 107 , the adhesive structure 106 completes edge sealing without affecting the area range of the dimming function layer 103 .

[0111] In some embodiments, Figure 5 and Figure 6 As shown, the PDLC film layer 1032 includes a first substrate and a second substrate, and the flexible dye liquid crystal film layer 1031 includes a third substrate and a fourth substrate.

[0112] The dimming glass assembly 1 also includes a first flexible circuit board 23, a second flexible circuit board 24, a third flexible circuit board 21 and a fourth flexible circuit board 22, which are electrically connected to the conductive film layers on the first substrate, the second substrate, the third substrate and the fourth substrate respectively, and are all arranged on the same side of the dimming glass assembly 1.

[0113] There is a gap 25 between the orthographic projections of the first flexible circuit board 23 and the second flexible circuit board 24 on the first surface and the orthographic projections of the third flexible circuit board 21 and the fourth flexible circuit board 22 on the first surface. The first surface is parallel to the first glass substrate 101, and the gap 25 ranges from 10 mm to 30 mm.

[0114] Optionally, the first surface is parallel to the first substrate, the second substrate, the third substrate or the fourth substrate. When the dimming glass component 1 is a flat glass component, the first surface is in a flat state; when the dimming glass component 1 is a hyperbolic glass component or a single-curved glass component, the first surface is in a curved state.

[0115] Optionally, the first substrate, the second substrate, the third substrate and the fourth substrate are not Figure 5 However, those skilled in the art can understand the positional relationship of the substrate on the PDLC film layer 1032 and the flexible dye liquid crystal film layer 1031 .

[0116] Optionally, the third substrate and the fourth substrate include flexible polyester film (PET).

[0117] Optionally, the dimming functional layer 103 includes at least one PDLC film layer 1032 and at least one flexible dye liquid crystal film layer 1031 , each functional film layer includes two substrates, and the conductive film layer on each substrate is electrically connected to a flexible circuit board.

[0118] Optionally, the first flexible circuit board 23 and the second flexible circuit board 24 are used to connect to a power source to control the power-on state and the power-off state of the PDLC film layer 1032; the third flexible circuit board 21 and the fourth flexible circuit board 22 are used to connect to a power source to control the power-on state and the power-off state of the flexible dye liquid crystal film layer 1031.

[0119] Optionally, the first flexible circuit board 23 , the second flexible circuit board 24 , the third flexible circuit board 21 and the fourth flexible circuit board 22 include FPC (Flexible Printed Circuit).

[0120] Alternatively, if Figure 6 As shown, the first flexible circuit board 23 and the second flexible circuit board 24, and the third flexible circuit board 21 and the fourth flexible circuit board 22 are staggered on the same side of the dimming glass assembly 1, with a certain interval 25, to ensure that during the lamination process, the overlapping parts caused by the overlapping of the flexible circuit boards are reduced to be too thick and cracked, thereby ensuring the uniformity of the lamination film layer.

[0121] Optionally, there is a gap 25 between the orthographic projections of the first flexible circuit board 23 and the second flexible circuit board 24 on the first surface and the orthographic projections of the third flexible circuit board 21 and the fourth flexible circuit board 22 on the first surface. The gap 25 ranges from 10 mm to 30 mm, and can be 10 mm or 30 mm. At this gap 25, the uniformity and stability of the film lamination process are ensured.

[0122] In some embodiments, Figure 7 and Figure 8 The dimming function layer 103 includes a PDLC film layer 1032 and two flexible dye liquid crystal film layers 1031a and 1031b. Figure 7 As shown, the two flexible dye liquid crystal film layers 1031 a and 1031 b are respectively arranged on two sides of the PDLC film layer 1032 .

[0123] like Figure 8 As shown, the orthographic projection of the third flexible circuit board 21a and the fourth flexible circuit board 22a electrically connected to one layer of flexible dye liquid crystal film layer 1013a on the first surface and the interval 25 of the orthographic projection of the first flexible circuit board 23 and the second flexible circuit board 24 on the first surface are equal to the orthographic projection of the third flexible circuit board 21b and the fourth flexible circuit board 22b electrically connected to another layer of flexible dye liquid crystal film layer 1031b on the first surface and the interval 25 of the orthographic projection of the first flexible circuit board 23 and the second flexible circuit board 24 on the first surface.

[0124] Optionally, the liquid crystals of the flexible dye liquid crystal film layer 1013 a and the flexible dye liquid crystal film layer 1031 b are aligned perpendicular to each other.

[0125] Optionally, the flexible dye liquid crystal film layer 1031a includes a third substrate and a fourth substrate, and the third flexible circuit board 21a and the fourth flexible circuit board 22a are electrically connected to the conductive film layers on the third substrate and the fourth substrate of the flexible dye liquid crystal film layer 1031a.

[0126] The flexible dye liquid crystal film layer 1031b includes a third substrate and a fourth substrate, and the third flexible circuit board 21b and the fourth flexible circuit board 22b are electrically connected to the conductive film layers on the third substrate and the fourth substrate of the flexible dye liquid crystal film layer 1031b.

[0127] Optionally, the first flexible circuit board 23 , the second flexible circuit board 24 , the third flexible circuit board 21 a , the fourth flexible circuit board 22 a , the third flexible circuit board 21 b and the fourth flexible circuit board 22 b are all arranged on the same side of the dimming glass assembly 1 .

[0128] Optionally, the interval 25 ranges from 10 mm to 30 mm, and may be 10 mm or 30 mm.

[0129] Optionally, those skilled in the art will appreciate that the number and arrangement of the flexible circuit boards correspond to the film layer in the dimming functional layer 103 and the substrate on the film layer, and the position and spacing 25 of the flexible circuit boards can be adjusted according to the number of flexible circuit boards to reduce the risk of cracking due to excessive thickness of the overlapping parts caused by the overlapping of the flexible circuit boards.

[0130] In some embodiments, the dimming glass assembly 1 includes dimming bulletproof glass, dimming non-tempered glass, dimming semi-tempered glass, dimming architectural curved glass, dimming skylight, dimming locomotive side window glass, dimming locomotive skylight glass, dimming rear windshield or dimming corner window glass.

[0131] Optionally, those skilled in the art will appreciate that by adjusting the components of each film layer in the dimming glass assembly 1, glasses with different functions or shapes can be made and applied to various fields and locations, which will not be elaborated here.

[0132] Based on the same inventive concept, the present application embodiment provides a method for preparing a dimming glass assembly 1, which is used to prepare the dimming glass assembly 1 provided above. The flow chart of the preparation method is as follows: Fig. 9 As shown, the method includes the following steps S901-S906:

[0133] S901: preparing a first adhesive layer 102 covering the entire surface on one side of the first glass substrate 101 .

[0134] Optionally, the first glass substrate 101 and the first adhesive layer 102 are of the same size, and the first adhesive layer 102 completely covers the first glass substrate 101 .

[0135] Optionally, the first glass substrate 101 and the first adhesive layer 102 are trimmed to make their edges flush.

[0136] S902: Prepare at least one PDLC film layer 1032 and at least one flexible dye liquid crystal film layer 1031 in the main area of ​​the first adhesive layer 102 away from the first glass substrate 101 to form a dimming function layer 103, and ensure that there is a first distance 1071 between the side of the dimming function layer 103 and the side of the first glass substrate 101, and then execute step S904.

[0137] Optionally, the PDLC film layer 1032 and the flexible dye liquid crystal film layer 1031 are of the same size and are stacked to form a dimming functional layer 103 . The dimming functional layer 103 is smaller than the first adhesive layer 102 and the first glass substrate 101 , and is retracted by a first distance 1071 relative to the first glass substrate 101 .

[0138] S903: preparing a second adhesive layer 104 covering the entire surface on one side of the second glass substrate 105 .

[0139] Optionally, the second glass substrate 105 and the second adhesive layer 104 are of the same size, and the second adhesive layer 104 completely covers the second glass substrate 105 .

[0140] Optionally, the second glass substrate 105 and the second adhesive layer 104 are trimmed to make their edges flush.

[0141] S904: Bond the main area of ​​the second adhesive layer 104 to the dimming function layer 103 so that a circumferential groove 107 is formed between the peripheral area of ​​the first adhesive layer 102 corresponding to the first distance 1071 , the side wall of the dimming function layer 103 , and the peripheral area of ​​the second adhesive layer 104 corresponding to the first distance 1071 .

[0142] Optionally, the first glass substrate 101 and the first adhesive layer 102 are symmetrical with the second glass substrate 105 and the second adhesive layer 104 relative to the dimming function layer 103, and there is a first distance 1071 between the side of the dimming function layer 103 and the side of the first glass substrate 101 and the second glass substrate 105 which are arranged opposite to each other.

[0143] Optionally, a first distance 1071 by which the dimming function layer 103 is retracted relative to the first glass substrate 101 and the second glass substrate 105 is combined with a side wall of the dimming function layer 103 to form a circumferential groove 107 .

[0144] S905: Fill the bonding structure 106 in the circumferential groove 107 to obtain an initial dimming glass assembly 1.

[0145] Optionally, after the bonding structure 106 is filled in the circumferential groove 107 to obtain the initial dimming glass assembly 1 and before the initial dimming glass assembly 1 is assembled, the process further includes:

[0146] Using fixing parts, fix the periphery of the initial dimming glass assembly 1;

[0147] The initial dimming glass assembly 1 whose periphery is fixed by fixing members is placed in a vacuum bag.

[0148] Optionally, the fixing part includes a high temperature resistant tape, and fixing the periphery of the initial dimming glass assembly 1 includes wrapping and fixing the periphery of the initial dimming glass assembly 1. Those skilled in the art can understand that the fixed initial dimming glass assembly 1 can prevent the film layer from being dislocated in subsequent processing.

[0149] S906: performing a assembling process on the initial dimming glass assembly 1 to obtain a dimming glass assembly 1.

[0150] Optionally, the initial dimming glass assembly 1 is subjected to a sheet-joining process to obtain a dimming glass assembly 1, comprising:

[0151] The initial dimming glass assembly 1 whose periphery is fixed by fixing members in the vacuum bag is subjected to a design temperature range and a design pressure range.

[0152] Remove the vacuum bag and fasteners.

[0153] The initial dimming glass assembly 1 is trimmed so that the first adhesive layer 102 , the second adhesive layer, the adhesive structure 106 are flush with the outer sides of the first glass substrate 101 and the second glass substrate 105 .

[0154] Optionally, the design temperature range and the design pressure range applied to the initial dimming glass assembly 1 fixed by the fixing member at the periphery in the vacuum bag include:

[0155] The first step: perform a vacuum treatment at room temperature for more than 3 hours, and maintain the vacuum negative pressure at 1 atmosphere, i.e. -0.1 MPa (megapascals), in order to completely extract the air in the initial dimming glass assembly 1 structure.

[0156] Step 2: Place the initial dimming glass assembly 1 after the first stage of vacuuming flat into a specially modified autoclave, and keep the vacuum bag airtight during the whole process. The other end of the vacuum tube connected to the vacuum bag is connected to the vacuum pump in the autoclave. Close the autoclave door, set the vacuum degree of the vacuum pump to -0.09MPa~-0.1MPa, and the temperature to 40 degrees.

[0157] Step 3: performing a sheet-joining operation on the initial dimming glass assembly 1 after the second stage of vacuuming.

[0158] Optionally, during the lamination operation, when the bonding material is PVB, the following stages are included:

[0159] The first stage: the temperature of the autoclave is set to 55 degrees, the pressure is 0, the heating time is 5 minutes, and the vacuum degree of the vacuum bag is -0.1MPa. This stage is mainly to evacuate the air in the vacuum bag.

[0160] The second stage: the temperature of the autoclave is set to 80 degrees, the pressure is 0.3MPa, heating for 10 minutes, and the vacuum degree of the vacuum bag is -0.1MPa.

[0161] The third stage: the temperature of the autoclave is set to 115 degrees, the pressure is 1.0 MPa, heating is carried out for 10 minutes, and the vacuum degree of the vacuum bag is -0.1 MPa.

[0162] Stage 4: The temperature of the autoclave is set to 115 degrees, the pressure is 1.0 MPa, the temperature and pressure are maintained for 45 minutes, and the vacuum degree of the vacuum bag is -0.1 MPa.

[0163] The fifth stage: the temperature and pressure reduction stage, the temperature of the autoclave is set to 90 degrees, the pressure is 0.5MPa, the temperature and pressure reduction time is 20 minutes, and the vacuum degree of the vacuum bag is 0MPa.

[0164] Stage 6: The temperature of the autoclave is set to 90 degrees, the pressure is 0.5 MPa, the temperature and pressure are maintained for 10 minutes, and the vacuum degree of the vacuum bag is 0 MPa.

[0165] Stage 7: The temperature of the autoclave is set to 60 degrees Celsius, the pressure is 0.2 MPa, the temperature and pressure reduction time is 10 minutes, and the vacuum degree of the vacuum bag is 0 MPa.

[0166] Stage 8: The temperature of the autoclave is set to 40 degrees Celsius and the pressure is 0 MPa. After the pressure drops to the set parameters, the autoclave door is opened, the vacuum bag is removed, and the dimming glass assembly 1 is taken out.

[0167] Optionally, during the lamination operation, when the bonding material is EVA, the following stages are included:

[0168] The first stage: the temperature of the autoclave is set to 50 degrees, the pressure is 0, the heating time is 5 minutes, and the vacuum degree of the vacuum bag is -0.1MPa. This stage is mainly to evacuate the air in the vacuum bag.

[0169] The second stage: the temperature of the autoclave is set to 70 degrees, the pressure is 0.3MPa, heating for 10 minutes, and the vacuum degree of the vacuum bag is -0.1MPa.

[0170] The third stage: the temperature of the autoclave is set to 90 degrees, the pressure is 0.8MPa, heating is carried out for 10 minutes, and the vacuum degree of the vacuum bag is -0.09 to -0.1MPa.

[0171] The fourth stage: the heat preservation and pressure holding stage, the temperature of the autoclave is set to 90 degrees, the pressure is 0.8MPa, the heat preservation and pressure holding time is 45 minutes, and the vacuum degree of the vacuum bag is -0.1MPa.

[0172] The fifth stage: the temperature and pressure reduction stage, the temperature of the autoclave is set to 70 degrees Celsius, the pressure is 0.5MPa, the temperature and pressure reduction time is 20 minutes, and the vacuum degree of the vacuum bag is 0MPa.

[0173] Stage 6: The temperature of the autoclave is set to 70 degrees Celsius, the pressure is 0.5 MPa, the temperature and pressure are maintained for 10 minutes, and the vacuum degree of the vacuum bag is 0 MPa.

[0174] Stage 7: The temperature of the autoclave is set to 55 degrees Celsius, the pressure is 0.2 MPa, the temperature and pressure reduction time is 10 minutes, and the vacuum degree of the vacuum bag is 0 MPa.

[0175] Stage 8: The temperature of the autoclave is set to 40 degrees Celsius and the pressure is 0 MPa. After the requirements are met, the autoclave door is opened, the vacuum bag is removed, and the dimming glass assembly 1 is taken out.

[0176] Optionally, when EVA is used as the first adhesive layer 102, the second adhesive layer 104 and the adhesive structure 106, the softening temperature is lower, and the lamination can be achieved at a lower temperature and pressure.

[0177] Optionally, the above-mentioned joining operation is completed under low temperature and low pressure to avoid the structure of the flexible dye liquid crystal film layer 1031 being destroyed during the traditional high temperature and high pressure joining operation (pressure reaches 12.5MPa and temperature reaches 135 degrees Celsius). The dimming function of the dimming glass assembly 1 is not affected under the above operation.

[0178] Step 4: After the third step of the assembly operation, the dimming glass assembly 1 is trimmed to make the edges of each film layer flush.

[0179] Optionally, after the lamination process, the first adhesive layer 102, the second adhesive layer 104 and the adhesive structure 106 may partially overflow, and the overflowing portions are trimmed.

[0180] In the dimming glass assembly 1 provided in the embodiment of the present application, the dimming function layer 103 includes at least one PDLC film layer 1032 , which solves the problem that the transmittance of the dimming glass assembly 1 is high in a non-transparent state.

[0181] Moreover, the dimming function layer 103 includes at least one flexible dye liquid crystal film layer 1031, which solves the technical problem of affecting the visual effect by appearing foggy in the opaque state. Specifically:

[0182] The dimming glass assembly 1 provided in the embodiment of the present application includes a dimming function layer 103, and the dimming function layer 103 includes at least one PDLC film layer 1032. When the power is on, the PDLC film layer 1032 is in a light-transmitting state and does not affect the normal transmission of light. When the power is off, the PDLC film layer 1032 is in a foggy state, with high light-shielding properties and low light transmittance, thereby ensuring confidentiality.

[0183] Moreover, the dimming functional layer 103 also includes at least one layer of flexible dye liquid crystal film layer 1031. When the flexible dye liquid crystal film layer 1031 is powered on, it is in a light-transmitting state and does not affect the normal transmission of light. When the power is off, the flexible dye liquid crystal film layer 1031 is in a dark state and can be combined with the PDLC film layer 1032 to achieve a black but not transparent effect, thereby improving the visual experience.

[0184] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, altered, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0185] In the description of the present application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the exemplary directions or positional relationships shown in the accompanying drawings. They are for the convenience of describing or simplifying the description of the embodiments of the present application, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0186] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0187] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0188] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0189] It should be understood that, although the various steps in the flowchart of the accompanying drawings are displayed in sequence according to the indication of the arrows, the order of implementation of these steps is not limited to the order indicated by the arrows. Unless there is a clear description herein, in some implementation scenarios of the embodiments of the present application, the steps in each process can be performed in other orders according to demand. Moreover, some or all of the steps in each flow chart may include multiple sub-steps or multiple stages based on actual implementation scenarios. Some or all of these sub-steps or stages may be executed at the same time, or may be executed at different times in different scenarios at the execution time, and the execution order of these sub-steps or stages may be flexibly configured according to demand, and the embodiments of the present application do not limit this.

[0190] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A dimming glass assembly, characterized in that: include: A first glass substrate, a first adhesive layer, a dimming functional layer, a second adhesive layer and a second glass substrate are stacked; The dimming function layer comprises: a polymer dispersed liquid crystal film layer and two flexible dye liquid crystal film layers, wherein the two flexible dye liquid crystal film layers are respectively arranged on two sides of the polymer dispersed liquid crystal film layer; when powered on, the polymer dispersed liquid crystal film layer is in a light-transmitting state, and when powered off, the polymer dispersed liquid crystal film layer is in a foggy state and the flexible dye liquid crystal film layer is in a dark state; Wherein, when the power is on, the polymer dispersed liquid crystal film layer and the flexible dye liquid crystal film layer are powered on at the same time, and when the power is off, the polymer dispersed liquid crystal film layer and the flexible dye liquid crystal film layer are powered off at the same time; The polymer dispersed liquid crystal film layer comprises a first substrate and a second substrate, and the flexible dye liquid crystal film layer comprises a third substrate and a fourth substrate; The dimming glass assembly further includes a first flexible circuit board, a second flexible circuit board, a third flexible circuit board and a fourth flexible circuit board, which are electrically connected to the conductive film layers on the first substrate, the second substrate, the third substrate and the fourth substrate respectively, and are all arranged on the same side of the dimming glass assembly; There is a gap between the orthographic projections of the first flexible circuit board and the second flexible circuit board on the first surface and the orthographic projections of the third flexible circuit board and the fourth flexible circuit board on the first surface, the first surface is parallel to the first glass substrate, and the gap ranges from 10mm to 30mm.

2. The dimming glass assembly according to claim 1, characterized in that: Include at least one of the following: The thickness of the polymer dispersed liquid crystal film layer ranges from 0.2 mm to 0.38 mm; The thickness of the flexible dye liquid crystal film layer ranges from 0.2 mm to 0.38 mm; The first glass substrate and the second glass substrate include flat glass, double-curved glass or single-curved glass.

3. The dimming glass assembly according to claim 1, characterized in that: Also included: bonding structure; Along a first direction perpendicular to the first glass substrate, the sides of the first glass substrate, the first adhesive layer, the second adhesive layer and the second glass substrate are all aligned; Along a second direction parallel to the first glass substrate, there is a first distance between the side edge of the dimming functional layer and the side edge of the first glass substrate, and the first adhesive layer and a peripheral area corresponding to the first distance, the side peripheral wall of the dimming functional layer, and the second adhesive layer and a peripheral area corresponding to the first distance form a circumferential groove; The bonding structure is arranged at the circumferential groove.

4. The dimming glass assembly according to claim 3, characterized in that: Include at least one of the following: The bonding structure includes polyvinyl butyral or ethylene-vinyl acetate copolymer; The first distance ranges from 10 to 30 mm.

5. The dimming glass assembly according to claim 1, characterized in that: The interval between the orthographic projections of the third flexible circuit board and the fourth flexible circuit board electrically connected to one layer of the flexible dye liquid crystal film layer on the first surface and the orthographic projections of the first flexible circuit board and the second flexible circuit board on the first surface is equal to the interval between the orthographic projections of the third flexible circuit board and the fourth flexible circuit board electrically connected to another layer of the flexible dye liquid crystal film layer on the first surface and the orthographic projections of the first flexible circuit board and the second flexible circuit board on the first surface.

6. The dimming glass assembly according to claim 1, characterized in that: The dimming glass assembly comprises: Dimming bulletproof glass, dimming non-tempered glass, dimming semi-tempered glass, dimming architectural curved glass, dimming skylight, dimming locomotive side window glass, dimming locomotive skylight glass, dimming rear windshield or dimming corner window glass.

7. A method for preparing a dimming glass assembly, used for preparing the dimming glass assembly as claimed in any one of claims 3 to 6, characterized in that: The preparation method comprises: Prepare a first adhesive layer covering the entire surface on one side of the first glass substrate; At least one polymer dispersed liquid crystal film layer and at least one flexible dye liquid crystal film layer are prepared in the main area of ​​the first adhesive layer away from the first glass substrate to form a dimming functional layer, and a first distance exists between the side edge of the dimming functional layer and the side edge of the first glass substrate; Prepare a second adhesive layer covering the entire surface on one side of the second glass substrate; Adhere the main body area of ​​the second adhesive layer to the dimming functional layer, so that the peripheral area of ​​the first adhesive layer corresponding to the first distance, the side wall of the dimming functional layer and the peripheral area of ​​the second adhesive layer corresponding to the first distance form a circumferential groove; Filling the bonding structure in the circumferential groove to obtain an initial dimming glass assembly; The initial dimming glass assembly is subjected to a sheet-joining process to obtain a dimming glass assembly.

8. The preparation method according to claim 7, characterized in that: After the bonding structure is filled in the circumferential groove to obtain the initial dimming glass assembly, and before the initial dimming glass assembly is assembled, the method further includes: Using fixing pieces to fix the periphery of the initial dimming glass assembly; The initial dimming glass assembly whose periphery is fixed by fixing members is arranged in a vacuum bag.

9. The preparation method according to claim 8, characterized in that: The initial dimming glass assembly is subjected to a sheet-joining process to obtain a dimming glass assembly, comprising: Applying a design temperature range and a design pressure range to the initial dimming glass assembly whose periphery is fixed by fixing members in the vacuum bag; removing the vacuum bag and the fixing member; The initial dimming glass assembly is trimmed so that the first adhesive layer, the second adhesive layer, and the adhesive structure are flush with the outer sides of the first glass substrate and the second glass substrate.

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