Preparation method of a light-adjustable glass functional layer, functional layer and light-adjustable glass

Abstract

The present application discloses a preparation method of a light-adjustable glass functional layer, a functional layer and a light-adjustable glass, belonging to the field of light-adjustable glass. The preparation method includes: Step 1: preparing a first dye liquid crystal cell through a liquid crystal dropping and cell formation process; Step 2: thinning both the first glass substrate and the second glass substrate of the first dye liquid crystal cell to a thickness less than or equal to 0.27 mm to obtain a second dye liquid crystal cell; using the second dye liquid crystal cell as a substrate and performing a liquid crystal dropping and cell formation process with a third glass substrate to obtain a light-adjustable glass functional layer; or, using the first dye liquid crystal cell as a substrate and performing a liquid crystal dropping and cell formation process with a third glass substrate to obtain a third dye liquid crystal cell; thinning both the first glass substrate and the third glass substrate outside the third dye liquid crystal cell to a thickness less than or equal to 0.27 mm to obtain a light-adjustable glass functional layer. The total thickness of the light-adjustable glass fabricated by the present application is less than or equal to 5 mm, meeting the thickness assembly requirements of vehicle sunroofs and side windows.

Description

Technical Field

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

[0002] Currently, with the continuous improvement of people's living standards, the requirements for the comfort of passenger cars are also getting higher and higher, and the demand for adjusting the light inside passenger cars is gradually increasing. Generally, the skylights and side windows of passenger cars are made of dimming glass to adjust the light inside the car, and it is required that the dimming glass can achieve a light transmittance of less than 1% in the dark state to ensure good privacy protection or shading requirements, and can reach a higher transmittance in the bright state to provide a better view and lighting experience. At present, the only dimming glass that can meet this high-standard dimming requirement is the dimming glass with a dye liquid crystal functional layer. Further, in order to achieve a wide adjustment range from extremely low transmittance to high transmittance, the dye liquid crystal functional layer of this dimming glass must be prepared by an advanced double-cell dimming functional layer stacking technology. This technology precisely stacks two or more liquid crystal films containing specific dye liquid crystals, and utilizes the arrangement change of dye liquid crystal molecules under different voltages to precisely control the light transmittance. This method not only meets the strict requirements of passenger cars for the performance of dimming glass, but also promotes the further innovation and development of dimming glass in the automotive field.

[0003] Both liquid crystal cells of the above double-cell dimming functional layer are made of dye liquid crystals. The realization of the dimming function is achieved by driving the dye liquid crystals to rotate under different voltages. When the light absorption axis of the dye liquid crystal presents different angles with the light direction, the absorption degree of the dye liquid crystal for light is different, and thus the light transmittance is also different. Specifically, when no voltage is applied, the dye liquid crystal is almost perpendicular to the substrate. At this time, since the light absorption axis of the dye liquid crystal is parallel to the light incident direction, the light transmittance is the largest, which is characterized as the always-on state. When a voltage is applied, the dye liquid crystal starts to gradually transfer from a state perpendicular to the substrate to a state parallel to the substrate. When the light passes through the upper cell, the dye liquid crystal in the upper cell can effectively block the light parallel to the light absorption axis of the dye liquid crystal, but has limited blocking effect on the light perpendicular to the light absorption axis of the dye liquid crystal. This part of the light will pass through the upper cell and enter the lower cell. Since the PI orientation between the upper and lower cells is perpendicular to each other, the polarization direction of the partial polarized light that is not blocked by the upper cell is just parallel to the light absorption axis of the dye liquid crystal in the lower cell. In this way, the matching of the upper and lower double cells can achieve a darker shading effect compared with a single dye liquid crystal cell.

[0004] Although the dual-cell dimming functional layer can achieve a lower dark state, the structural design requirements of a passenger vehicle stipulate that the thicknesses of both the sunroof and side windows should be < 5 mm. Currently, in the dual-cell dimming functional layer stacking technology, the dye liquid crystal functional layer needs to be bonded to tempered glass through PVB to form a laminated glass unit (abbreviation: LGU) before it can be applied to the sunroof or side window. Currently, the thinnest tempered glass has a thickness of 1.6 mm, and the thinnest PVB has a thickness of 0.38 mm. Considering the thinning process and yield rate of the glass thickness of the functional layer, the thinnest thickness that can be prepared for a single piece of glass is 0.19 mm. Since the cell thickness of the functional layer is at the micron level, it is not considered. In summary, the thickness of the entire dimming glass is 1.6×2 + 0.38×3 + 0.19×4 = 5.1 mm > 5 mm, and this thickness is too thick to meet the thickness assembly requirements of vehicle sunroofs and side windows. Summary of the Invention

[0005] Embodiments of the present application provide a method for preparing a dimming glass functional layer, a functional layer, and a dimming glass, which can solve the problem that the existing dimming glass is too thick and does not meet the thickness assembly requirements of vehicle sunroofs and side windows.

[0006] To achieve the above object, the technical solution of the embodiments of the present invention is as follows:

[0007] In a first aspect, embodiments of the present invention provide a method for preparing a dimming glass functional layer, including:

[0008] Step 1: Prepare a first dye liquid crystal cell through a liquid crystal droplet injection cell formation process;

[0009] Step 2: Thin both the first glass substrate and the second glass substrate of the first dye liquid crystal cell to a thickness less than or equal to 0.27 mm to obtain a second dye liquid crystal cell; use the second dye liquid crystal cell as a substrate and perform a liquid crystal droplet injection cell formation process with a third glass substrate to obtain a dimming glass functional layer;

[0010] Alternatively, use the first dye liquid crystal cell as a substrate and perform a liquid crystal droplet injection cell formation process with a third glass substrate to obtain a third dye liquid crystal cell; thin both the first glass substrate and the third glass substrate outside the third dye liquid crystal cell to a thickness less than or equal to 0.27 mm to obtain a dimming glass functional layer.

[0011] In combination with the first aspect, in a possible implementation manner, the thinning method is HF acid chemical etching.

[0012] In combination with the first aspect, in a possible implementation manner, both the first glass substrate and the second glass substrate are thinned to a thickness of 0.19 mm;

[0013] And / or, both the third glass substrate and the fourth glass substrate are thinned to a thickness of 0.19 mm.

[0014] In a second aspect, another embodiment of the present invention provides a dimming glass functional layer prepared by the preparation method of the dimming glass functional layer described above, including a first glass substrate, a first electrode layer, a first alignment layer, a first dye liquid crystal layer, a second alignment layer, a second electrode layer, a second glass substrate, a third electrode layer, a third alignment layer, a second dye liquid crystal layer, a fourth alignment layer, a fourth electrode layer, and a third glass substrate arranged in sequence;

[0015] The peripheries of the first glass substrate and the second glass substrate are bonded by a sealant;

[0016] The peripheries of the second glass substrate and the third glass substrate are bonded by a sealant;

[0017] The orientations of the first dye liquid crystal layer and the second dye liquid crystal layer are perpendicular to each other;

[0018] The thicknesses of the first glass substrate and the second glass substrate are both less than or equal to 0.27 mm, or the thicknesses of the first glass substrate and the third glass substrate are both less than or equal to 0.27 mm.

[0019] In combination with the second aspect, in a possible implementation manner, the thicknesses of the first glass substrate and the second glass substrate are 0.19 mm;

[0020] And / or, both the first glass substrate and the third glass substrate are thinned to a thickness of 0.19 mm.

[0021] In combination with the second aspect, in a possible implementation manner, the orientation angles of the first alignment layer and the second alignment layer are specific angles.

[0022] In a third aspect, another embodiment of the present invention provides a dimming glass, including the dimming glass functional layer described above.

[0023] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0024] The preparation method of the light - modulating glass functional layer provided by the embodiment of the present application is as follows: First, a first dye - liquid crystal cell is prepared through a liquid - crystal dropping and cell - forming process. Then, both the first glass substrate and the second glass substrate of the first dye - liquid crystal cell are thinned to a thickness less than or equal to 0.27 mm to obtain a second dye - liquid crystal cell. The second dye - liquid crystal cell is used as a substrate and a third glass substrate is processed through a liquid - crystal dropping and cell - forming process to obtain the light - modulating glass functional layer. Alternatively, the first dye - liquid crystal cell is used as a substrate and a third glass substrate is processed through a liquid - crystal dropping and cell - forming process to obtain a third dye - liquid crystal cell. Both the first glass substrate and the third glass substrate outside the third dye - liquid crystal cell are thinned to a thickness less than or equal to 0.27 mm to obtain the light - modulating glass functional layer. The thickness of the finally obtained light - modulating glass functional layer is less than or equal to 1.04 mm. When using the light - modulating glass functional layer of the embodiment of the present application to manufacture light - modulating glass, the light - modulating glass includes a first tempered glass (with a thickness of 1.6 mm), a first adhesive layer (with a thickness of 0.38 mm), a light - modulating glass functional layer (with a thickness less than or equal to 1.04 mm), a second adhesive layer (with a thickness of 0.38 mm), and a second tempered glass (with a thickness of 1.6 mm) arranged in sequence. By optimizing the preparation method, the structure is optimized. Compared with the functional layer of the existing light - modulating glass, one adhesive layer is reduced, and the number of glass substrates is reduced from four to three, which reduces the thickness of the light - modulating glass functional layer. Therefore, the total thickness of the manufactured light - modulating glass is less than or equal to 5 mm, meeting the thickness assembly requirements of vehicle sunroofs and side windows. The two dye - liquid crystal cells formed by the light - modulating glass functional layer prepared by the preparation method of the embodiment of the present application are different from the superposition of two existing independent dye - liquid crystal cells. Instead, they are integrated in the production process, which can effectively reduce the thickness of the middle glass substrate and improve the overall unity of the light - modulating glass functional layer. At the same time, because the middle adhesive layer is omitted, the process difficulty of the overall tempering glass lamination is simpler than the manufacturing process of using two independent dye - liquid crystal cells before. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description in the embodiments of the present invention or the prior art. Obviously, the following - described drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a flowchart of the preparation method of the light - modulating glass functional layer provided by the embodiment of the present application;

[0027] Figure 2 It is a schematic structural diagram of the light - modulating glass functional layer prepared by the preparation method provided by the embodiment of the present application Figure 1 ;

[0028] Figure 3Schematic structure of the dimming glass functional layer prepared by the preparation method provided in the embodiments of the present application Figure 2 ;

[0029] Figure 4 Schematic diagram of the structure of the dimming glass provided in the embodiments of the present application;

[0030] Figure 5 Schematic diagram of the structure of the dimming glass provided by the prior art.

[0031] Icons: A - First dye liquid crystal cell; B - Second dye liquid crystal cell; C - Third dye liquid crystal cell; 1 - First glass substrate; 2 - First dye liquid crystal layer; 3 - Second glass substrate; 4 - Second dye liquid crystal layer; 5 - Third glass substrate; 6 - Sealant; 7 - First tempered glass; 8 - First adhesive layer; 9 - Second adhesive layer; 10 - Second tempered glass; 11 - Tempered glass; 12 - Dye liquid crystal cell; 13 - PVB adhesive layer. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0033] In the relevant descriptions of this embodiment, terms such as "including, containing, having" are all open terms, generally preferably understood as including but not limited to; the symbol "A / B" is used to describe the selection relationship of associated objects, generally indicating an "or" relationship before and after. In the following descriptions of this embodiment, the terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0034] Those skilled in the art should understand that in the following descriptions of the embodiments of the present application, the sequence numbers do not mean the order of execution. Some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. Unless otherwise specified, the technical / scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0035] Currently, the double-cell dimming functional layer stacking technology, such as Figure 5As shown, the dye liquid crystal functional layer needs to be bonded to the tempered glass 11 through the PVB adhesive layer 13 to form a laminated glass unit (abbreviation: LGU, English: Laminated Glass Unit) before it can be applied to the skylight or side window. The structure of the laminated glass unit is the tempered glass 11, the PVB adhesive layer 13, the dye liquid crystal cell 12 [including the glass substrates, electrode layers (thin, not shown in the figure), alignment layers (thin, not shown in the figure), dye liquid crystal layers, alignment layers (thin, not shown in the figure), electrode layers (thin, not shown in the figure), and glass substrates] arranged in sequence, the PVB adhesive layer 13, the dye liquid crystal cell 12 (with the same structure as above), the PVB adhesive layer 13, and the tempered glass 11. The two tempered glass 11 are bonded by the sealant 6 (the sealant 6 can use PVB adhesive) at the periphery. The upper dye liquid crystal cell 12 and the lower dye liquid crystal cell 12 are separate and independent, and the long axis directions of the dye liquid crystals in the upper dye liquid crystal cell 12 and the lower dye liquid crystal cell 12 are perpendicular to each other.

[0036] Currently, the thinnest thickness of the tempered glass 11 is 1.6 mm, and the thinnest thickness of the PVB adhesive layer 13 is 0.38 mm. Considering the thinning process and the yield rate of the glass thickness of the functional layer, the thinnest thickness that can be prepared for a single piece of glass is 0.19 mm currently. Since the cell thickness of the functional layer is at the micron level, it is not considered. In summary, the thickness of the entire dimming glass is 1.6×2 + 0.38×3 + 0.19×4 = 5.1 mm > 5 mm, and this thickness is too thick to meet the thickness assembly requirements of vehicle skylights and side windows.

[0037] The embodiment of the present invention provides a preparation method for a dimming glass functional layer, including the following steps 1 to 2.

[0038] Step 1: As Figure 2 (A) and Figure 3 (A) shows, the first dye liquid crystal cell A is prepared by the liquid crystal drop-casting into cell process. This liquid crystal drop-casting into cell process is the ODF (English: One Drop Filling) into cell process. The first dye liquid crystal cell A includes the first glass substrate 1, the first electrode layer (thin, not shown in the figure), the first alignment layer (thin, not shown in the figure), the first dye liquid crystal layer 2, the second alignment layer (thin, not shown in the figure), the second electrode layer (thin, not shown in the figure), and the second glass substrate 3 arranged in sequence. Among them, the first glass substrate 1 and the second glass substrate 3 use the commonly used glass substrates currently, and the thickness is 0.5 mm. The thicknesses of the first electrode layer, the first alignment layer, the first dye liquid crystal layer 2, the second alignment layer, and the second electrode layer are all thin, so the thickness of the first dye liquid crystal cell A is about 1 mm.

[0039] Step 2: As Figure 2As shown in (B), the first glass substrate 1 and the second glass substrate 3 of the first dye liquid crystal cell A are both thinned to a thickness less than or equal to 0.27 mm to obtain the second dye liquid crystal cell B. The thickness of the second dye liquid crystal cell B obtained after thinning the first dye liquid crystal cell A is reduced to less than or equal to 0.54 mm.

[0040] Among them, the thinning method is HF acid chemical etching. HF acid has extremely strong corrosiveness and can react chemically with a variety of materials, thus achieving efficient material removal and having high efficiency. By precisely controlling parameters such as the concentration, temperature, and flow rate of HF acid, fine control of the etching rate and etching shape can be achieved. HF acid can exhibit high selectivity during the etching process, that is, it can etch specific materials while having little impact on other materials. This selectivity helps to achieve precise local processing in complex material structures. By adjusting the concentration of HF acid and the mixing ratio with other chemical substances, the etching rate and etching effect can be flexibly adjusted to meet different processing requirements. This adjustability makes HF acid chemical etching widely applicable in a variety of application scenarios.

[0041] As Figure 2 As shown in (C), the second dye liquid crystal cell B is used as a substrate and a liquid crystal droplet injection and cell formation process is carried out with the third glass substrate 5 to obtain a dimming glass functional layer. The third glass substrate 5 is a commonly used glass substrate at present, with a thickness of 0.5 mm.

[0042] At this time, the dimming glass functional layer includes a first glass substrate 1, a first electrode layer, a first alignment layer, a first dye liquid crystal layer 2, a second alignment layer, a second electrode layer, a second glass substrate 3, a third electrode layer, a third alignment layer, a second dye liquid crystal layer 4, a fourth alignment layer, a fourth electrode layer, and a third glass substrate 5 arranged in sequence. The peripheries of the first glass substrate 1 and the second glass substrate 3 are bonded by a sealant 6. The peripheries of the second glass substrate 3 and the third glass substrate 5 are bonded by a sealant 6. The orientations of the first dye liquid crystal layer 2 and the second dye liquid crystal layer 4 are perpendicular to each other. At this time, the thickness of the dimming glass functional layer is less than or equal to 1.04 mm.

[0043] Or, as Figure 3As shown in (B), the first dye liquid crystal cell A is used as a substrate and the third glass substrate 5 is subjected to a liquid crystal droplet injection and cell formation process to obtain the third dye liquid crystal cell C. At this time, the third dye liquid crystal cell C includes a first glass substrate 1, a first electrode layer, a first alignment layer, a first dye liquid crystal layer 2, a second alignment layer, a second electrode layer, a second glass substrate 3, a third electrode layer, a third alignment layer, a second dye liquid crystal layer 4, a fourth alignment layer, a fourth electrode layer, and a third glass substrate 5 arranged in sequence. The peripheries of the first glass substrate 1 and the second glass substrate 3 are bonded by a sealant 6. The peripheries of the second glass substrate 3 and the third glass substrate 5 are bonded by a sealant 6. The orientations of the first dye liquid crystal layer 2 and the second dye liquid crystal layer 4 are perpendicular to each other. The thickness of the third liquid crystal dye cell is 1.5 mm.

[0044] Both the first glass substrate 1 and the third glass substrate 5 on the outside of the third dye liquid crystal cell C are thinned to a thickness less than or equal to 0.27 mm to obtain a dimming glass functional layer. The middle second glass substrate 3 cannot be thinned because it is fixed in the middle and cannot contact the etching solution. At this time, the thickness of the dimming glass functional layer is less than or equal to 1.04 mm.

[0045] The method for preparing the dimming glass functional layer provided by the embodiment of the present application first prepares the first dye liquid crystal cell A through a liquid crystal droplet injection and cell formation process. Then, both the first glass substrate 1 and the second glass substrate 3 of the first dye liquid crystal cell A are thinned to a thickness less than or equal to 0.27 mm to obtain the second dye liquid crystal cell B. The second dye liquid crystal cell B is used as a substrate and the third glass substrate 5 is subjected to a liquid crystal droplet injection and cell formation process to obtain the dimming glass functional layer. Alternatively, the first dye liquid crystal cell A is used as a substrate and the third glass substrate 5 is subjected to a liquid crystal droplet injection and cell formation process to obtain the third dye liquid crystal cell C. Both the first glass substrate 1 and the third glass substrate 5 on the outside of the third dye liquid crystal cell C are thinned to a thickness less than or equal to 0.27 mm to obtain the dimming glass functional layer. The thickness of the finally obtained dimming glass functional layer is less than or equal to 1.04 mm. When using the dimming glass functional layer of the embodiment of the present application to manufacture dimming glass, such as Figure 4As shown in the figure, the dimming glass includes a first tempered glass 7 (with a thickness of 1.6 mm), a first adhesive layer 8 (with a thickness of 0.38 mm), a dimming glass functional layer (with a thickness less than or equal to 1.04 mm), a second adhesive layer 9 (with a thickness of 0.38 mm), and a second tempered glass 10 (with a thickness of 1.6 mm) arranged in sequence. Through optimizing the preparation method, the structure is optimized. Compared with the functional layer of the existing dimming glass, it has one less adhesive layer, and the number of glass substrates is reduced from four to three, reducing the thickness of the dimming glass functional layer. Therefore, the total thickness of the produced dimming glass is less than or equal to 5 mm, meeting the thickness assembly requirements of vehicle sunroofs and side windows. The two dye liquid crystal cells formed by the dimming glass functional layer prepared by the preparation method of the embodiment of the present application are integrated in the production process, different from the superposition of the existing two independent dye liquid crystal cells 12. This can effectively reduce the thickness of the middle glass substrate and improve the overall unity of the dimming glass functional layer. At the same time, because the middle adhesive layer is omitted, the process difficulty of laminating the overall tempered glass 11 is simpler than the manufacturing process of independently using two dye liquid crystal cells 12 before.

[0046] Furthermore, both the first glass substrate 1 and the second glass substrate 3 are thinned to a thickness of 0.19 mm, so that the first glass substrate 1 and the second glass substrate 3 can be thinned based on the original production line without the need to improve the original production line, saving time, effort and cost. At this time, the thickness of the second dye liquid crystal cell B obtained by thinning the first dye liquid crystal cell A is 0.38 mm, and the thickness of the prepared dimming glass functional layer is 0.88 mm. And / or, both the first glass substrate 1 and the third glass substrate 5 are thinned to a thickness of 0.19 mm, and the thickness of the prepared dimming glass functional layer is 0.88 mm. When using the dimming glass functional layer of the embodiment of the present application to make dimming glass, the total thickness of the dimming glass is 1.6 mm + 0.38 mm + 0.88 mm + 0.38 mm + 1.6 mm = 4.84 mm < 5 mm, meeting the thickness assembly requirements of vehicle sunroofs and side windows.

[0047] Another embodiment of the present invention provides a dimming glass functional layer, which is prepared by the preparation method of the dimming glass functional layer described above, and includes a first glass substrate 1, a first electrode layer, a first alignment layer, a first dye liquid crystal layer 2, a second alignment layer, a second electrode layer, a second glass substrate 3, a third electrode layer, a third alignment layer, a second dye liquid crystal layer 4, a fourth alignment layer, a fourth electrode layer, and a third glass substrate 5 arranged in sequence. The peripheries of the first glass substrate 1 and the second glass substrate 3 are bonded by a sealant 6. The peripheries of the second glass substrate 3 and the third glass substrate 5 are bonded by a sealant 6. The orientations of the first dye liquid crystal layer 2 and the second dye liquid crystal layer 4 are perpendicular to each other. Based on the dichroism of the dye liquid crystal, a darker light-shielding effect can be achieved through two dye liquid crystal functional layers with perpendicular orientations, making the dimming effect better. The thicknesses of both the first glass substrate 1 and the second glass substrate 3 are less than or equal to 0.27 mm, or the thicknesses of both the first glass substrate 1 and the third glass substrate 5 are less than or equal to 0.27 mm. The total thickness of the produced dimming glass is less than or equal to 5 mm, meeting the thickness assembly requirements of vehicle sunroofs and side windows.

[0048] Further, the thicknesses of the first glass substrate 1 and the second glass substrate 3 are 0.19 mm. And / or, both the first glass substrate 1 and the third glass substrate 5 are thinned to a thickness of 0.19 mm. When using the dimming glass functional layer of the embodiment of the present application to produce dimming glass, the total thickness of the dimming glass is 1.6 mm + 0.38 mm + 0.88 mm + 0.38 mm + 1.6 mm = 4.84 mm < 5 mm, meeting the thickness assembly requirements of vehicle sunroofs and side windows.

[0049] Optionally, the alignment angles of the first alignment layer and the second alignment layer are specific angles. The specific angles can be 45°, 90°, 180°, etc.

[0050] Another embodiment of the present invention provides a dimming glass, which includes the above-mentioned dimming glass functional layer.

[0051] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, reference can be made to each other. The key points of each embodiment are the differences from other embodiments.

[0052] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A method for preparing a dimming glass functional layer, characterized in that: include: Step 1: preparing a first dye liquid crystal cell by a liquid crystal drop-casting cell-forming process; Step 2: Thinning the first glass substrate and the second glass substrate of the first dye liquid crystal box to a thickness of 0.19 mm to obtain a second dye liquid crystal box; using the second dye liquid crystal box as a substrate and the third glass substrate to perform a liquid crystal dripping process to obtain a dimming glass functional layer.

2. The method for preparing a dimming glass functional layer according to claim 1, characterized in that: The thinning method is HF acid chemical etching.

3. A dimming glass functional layer, characterized in that: The method for preparing the dimming glass functional layer according to any one of claims 1 to 2 comprises a first glass substrate, a first electrode layer, a first orientation layer, a first dye liquid crystal layer, a second orientation layer, a second electrode layer, a second glass substrate, a third electrode layer, a third orientation layer, a second dye liquid crystal layer, a fourth orientation layer, a fourth electrode layer and a third glass substrate arranged in sequence; The first glass substrate and the second glass substrate are bonded to each other at their peripheries by a sealant; The peripheries of the second glass substrate and the third glass substrate are bonded by a sealant; The first dye liquid crystal layer and the second dye liquid crystal layer are oriented perpendicular to each other; The thickness of the first glass substrate and the second glass substrate is 0.19 mm.

4. The dimming glass functional layer according to claim 3, characterized in that: The alignment angles of the first alignment layer and the second alignment layer are specific angles.

5. A dimming glass, characterized in that: It comprises the dimming glass functional layer as described in any one of claims 3 to 4.

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