Dimming Glass and Glass Assembly

Abstract

The present invention provides a dimming glass and a glass component, belonging to the technical field of display glass. The dimming glass of the present invention includes at least one dimming module; the dimming module includes a first substrate and a second substrate arranged opposite to each other, and a dye liquid crystal layer disposed between the first substrate and the second substrate; the dye liquid crystal layer is used to flip under the control of an electric field generated between the first substrate and the second substrate to control the light transmittance; the dye liquid crystal layer includes a polymer network, which is used to make the twisting degrees of the respective liquid crystal molecules in the dye liquid crystal layer substantially the same and the twisting degrees of the respective dye molecules substantially the same when the electric field generated between the first substrate and the second substrate changes.

Description

Technical Field

[0001] The present invention belongs to the technical field of display glass, and particularly relates to a dimming glass and a glass assembly. Background Art

[0002] At present, dimming glass is more and more widely used in the fields of architecture and transportation. Now, customers such as cars, high-speed trains, and airliners are interested in dye liquid crystal dimming glass. In the existing intelligent glass market, there are products such as PDLC (polymer dispersed liquid crystal) intelligent glass and electrochromic intelligent glass. PDLC intelligent glass can only achieve the switching between transparency and haze, without light shielding or heat insulation; electrochromic intelligent glass has problems such as complex film layer processes, slow response time (8 - 20 s), and a blueish color in the dark state. Dye liquid crystal dimming glass utilizes the selective absorption of light by dichroic dye molecules in the liquid crystal to achieve the switching between the bright state and the dark state. Compared with the existing PDLC and electrochromic intelligent glass, it has greatly improved optical properties such as black state purity and response time. However, the existing dye liquid crystal dimming glass can only achieve the adjustment of the black state, bright state, and gray scale state, that is, it can only adjust the transmittance of the glass to visible light. When dimming glass is used for vehicle windows, meeting room partitions, and building glass, there is a need for privacy protection while allowing light to pass through; in the fields of vehicle windows, art design, etc., the application prospect of full-color dimming glass is huge. Currently, dimming glass cannot meet the requirements of these applications. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art, and provides a dimming glass and a glass assembly.

[0004] In a first aspect, an embodiment of the present disclosure provides a dimming glass, including at least one dimming module; the dimming module includes a first substrate and a second substrate disposed opposite to each other, and a dye liquid crystal layer disposed between the first substrate and the second substrate; the dye liquid crystal layer is configured to be flipped under the control of an electric field generated between the first substrate and the second substrate to control the light transmittance; the dye liquid crystal layer includes a polymer network, which is configured to make the torsion degrees of the respective liquid crystal molecules in the dye liquid crystal layer substantially the same and the torsion degrees of the respective dye molecules substantially the same when the electric field generated between the first substrate and the second substrate changes.

[0005] Optionally, the dimming glass is in a normally black mode; the polymerizable monomers of the polymer network are arranged perpendicular to the plane where the first substrate is located.

[0006] Optionally, the dimming glass is in a normally white mode; the polymerizable monomers of the polymer network are arranged in a planar spiral pattern.

[0007] Optionally, the number of the dimming modules is only one, and a chiral additive is further included in the dye liquid crystal layer.

[0008] Optionally, the mass ratio of the chiral additive in the dye liquid crystal layer is 0.2% - 10%.

[0009] Optionally, the polymerizable monomers of the polymer network include photopolymerizable monomers or thermopolymerizable monomers.

[0010] Optionally, the photopolymerizable monomers include acrylate monomers; the thermopolymerizable monomers include epoxy resin monomers.

[0011] Optionally, the mass ratio of the polymerizable monomers of the polymer network in the dye liquid crystal layer is 1% - 40%.

[0012] Optionally, the number of the dimming modules is multiple, and the multiple dimming modules are stacked.

[0013] Optionally, the first substrate includes a first base and a first electrode disposed on one side of the first base close to the dye liquid crystal layer; the second substrate includes a second base and a second electrode disposed on one side of the second base close to the dye liquid crystal layer; wherein,

[0014] Both the first electrode and the second electrode are plate-shaped electrodes.

[0015] Optionally, the first substrate includes a first base and a first electrode disposed on one side of the first base close to the dye liquid crystal layer; the second substrate includes a second base and a second electrode disposed on one side of the second base close to the dye liquid crystal layer; wherein,

[0016] One of the first electrode and the second electrode is a plate-shaped electrode, and the other is a strip-shaped electrode.

[0017] In a second aspect, an embodiment of the present disclosure provides a glass assembly, which includes the above-mentioned dimming glass. Description of the Drawings

[0018] Figure 1 It is a schematic cross-sectional structure diagram of a dimming glass in an exemplary normally black mode when not powered on;

[0019] Figure 2 For Figure 1 a cross-sectional view of the dimming glass when a small voltage (V1) is applied to the first electrode and the second electrode of the dimming glass;

[0020] Figure 3 For Figure 1 a cross-sectional view of the dimming glass when a voltage (V2) is applied to the first electrode and the second electrode of the dimming glass;

[0021] Figure 4 When a relatively large voltage (V3) is applied to the first electrode and the second electrode of the dimming glass Figure 1 ; sectional view

[0022] Figure 5 Fig. is a schematic cross-sectional structure diagram of a dimming glass in an exemplary normally white mode when no power is applied;

[0023] Figure 6 When Figure 5 a relatively small voltage (V4) is applied to the first electrode and the second electrode of the dimming glass

[0024] Figure 7 When Figure 5 a relatively large voltage (V5) is applied to the first electrode and the second electrode of the dimming glass

[0025] Figure 8 Fig. is a schematic cross-sectional structure diagram during the manufacturing process of a normally black mode dimming glass in an embodiment of the present disclosure;

[0026] Figure 9 Fig. is a schematic cross-sectional structure diagram of a normally black mode dimming glass in an embodiment of the present disclosure when no power is applied;

[0027] Figure 10 When Figure 9 a relatively small voltage (V1) is applied to the first electrode and the second electrode of the dimming glass

[0028] Figure 11 When Figure 9 a voltage (V2) is applied to the first electrode and the second electrode of the dimming glass

[0029] Figure 12 When Figure 9 a relatively large voltage (V3) is applied to the first electrode and the second electrode of the dimming glass

[0030] Figure 13 Fig. is a graph of transmittance versus voltage (V-T) for normally black mode dimming glasses with and without a polymer network;

[0031] Figure 14 Fig. is a schematic cross-sectional structure diagram during the manufacturing process of a normally white mode dimming glass in an embodiment of the present disclosure;

[0032] Figure 15 Fig. is a schematic cross-sectional structure diagram of a normally white mode dimming glass in an embodiment of the present disclosure when no power is applied;

[0033] Figure 16 When Figure 15 a relatively small voltage (V4) is applied to the first electrode and the second electrode of the dimming glass

[0034] Figure 17 When Figure 15 a relatively large voltage (V5) is applied to the first electrode and the second electrode of the dimming glass; sectional view

[0035] Figure 18 For the normally white mode dimming glass without a polymer network and containing a polymer network, transmittance vs. voltage (V-T) curve graph

[0036] Figure 19 Schematic structural diagram of the liquid crystalline photopolymerizable monomer used in the dimming glass of the present disclosure embodiment

[0037] Figure 20 Schematic structural diagram of the chiral liquid crystalline photopolymerizable monomer used in the dimming glass of the present disclosure embodiment

[0038] Figure 21 Schematic structural diagram of the liquid crystalline photoinitiator used in the dimming glass of the present disclosure embodiment

[0039] Figure 22 Schematic structural diagram of the thermal polymerizable monomer used in the dimming glass of the present disclosure embodiment

[0040] Figure 23 Schematic structural diagram of the chiral additive used in the dimming glass of the present disclosure embodiment

[0041] Figure 24 Schematic flow chart during the manufacturing process of the normally black mode dimming glass in the present disclosure embodiment

[0042] Figure 25 Schematic flow chart during the manufacturing process of the normally white mode dimming glass in the present disclosure embodiment

[0043] Wherein the reference numerals are: 1, first substrate; 2, first electrode; 3, first alignment layer; 4, liquid crystal molecules; 5, dye molecules; 6, chiral additive; 7, second alignment layer; 8, second electrode; 9, second substrate; 10, polymerizable network; 11, polymerizable monomer. Detailed implementation manners

[0044] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0045] Unless otherwise defined, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings as understood by those of ordinary skill in the field to which this disclosure pertains. The terms "first", "second" and similar words used in this disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0046] Figure 1 is a schematic cross-sectional structure diagram of a dimming glass in a non-powered state for an exemplary normally black mode; as Figure 1 shown, the dimming glass includes a first substrate, a second substrate, and a dye liquid crystal layer disposed between the first substrate and the second substrate. Among them, the first substrate includes a first base, a first electrode and a first alignment layer sequentially disposed on one side of the first base close to the dye liquid crystal layer; the second substrate includes a second base, a second electrode and a second alignment layer sequentially disposed on one side of the second base close to the dye liquid crystal layer. The dye liquid crystal layer includes positive liquid crystal molecules, dye molecules (for example: dichroic dyes), and chiral additives. When no voltage is applied to the first electrode and the second electrode, due to the action of the first alignment layer, the second alignment layer and the chiral molecules in the chiral additive, the liquid crystal molecules are helically arranged along the helical axis perpendicular to the first substrate (second substrate), presenting a planar texture, and at the same time inducing the dye molecules to be helically arranged in the plane parallel to the surface of the first substrate, absorbing incident light from all directions, thereby achieving the dark state, as Figure 1 shown. In order to reduce the dark state transmittance of the dimming glass and achieve a better dark state, generally the content of chiral additives in the dye liquid crystal layer is relatively high. Therefore, when a relatively small voltage (V1) is applied to the first electrode and the second electrode, the helical twisting force of the chiral additive and the electric field force between the first electrode and the second electrode counteract each other, resulting in the helical structure formed by the liquid crystal molecules rotating in all directions, that is, the helical axis rotates in all directions, forming a metastable state similar to a focal conic texture. Accordingly, the rotation degrees of dye molecules in different regions are different, as Figure 2As shown, it causes different absorption amounts of dye molecules in different regions, that is, different transmittances, resulting in Mura-like defects. After a relatively large voltage (V2) is applied to the first electrode and the second electrode, the electric field force on the liquid crystal molecules is enhanced, prompting the helical structure formed by the liquid crystal molecules to rotate preferentially along the pretilt angle direction. A uniform helical structure arrangement can be formed within the entire region. Correspondingly, the rotation degrees of dye molecules in different regions are the same, as Figure 3 shown. When the voltage (V3) applied to the first electrode and the second electrode is continuously increased, the electric field force continues to increase, the liquid crystal molecules unwind the helix, forming a field-induced nematic phase. The liquid crystal molecules are arranged perpendicular to the substrate, inducing the dye molecules to be arranged perpendicular to the substrate, with the minimum light absorption rate, that is, the highest transmittance, forming the bright state of the dimming glass, as Figure 4 shown.

[0047] The inventors found that for the dimming glass in the normally black mode, when a small voltage is applied to the first electrode and the second electrode, there is a phenomenon of uneven transmittance, that is, Mura-like defects, and gray-scale dimming cannot be achieved. At the same time, when the power is quickly removed from a high voltage, the electric field force disappears instantaneously. Under the action of the helical twisting force of the chiral additive, the liquid crystal molecules will form a metastable state similar to the focal conic texture, resulting in uneven transmittance and unable to meet the customer's requirements for gray-scale dimming and random switching between different gray scales.

[0048] Figure 5 It is a schematic cross-sectional structure diagram of an exemplary normally white mode dimming glass without power supply; as Figure 5 shown, this dimming glass is roughly similar in structure to the dimming glass in the normally black mode, and also includes a first substrate, a second substrate, and a dye liquid crystal layer disposed between the first substrate and the second substrate. The difference is that the liquid crystal molecules in the dye liquid crystal layer of this dimming glass are negative liquid crystal molecules. When no voltage is applied to the first electrode and the second electrode, due to the action of the first alignment layer, the second alignment layer, and the chiral molecules in the chiral additive, the liquid crystal molecules are arranged perpendicular to the first substrate (second substrate), inducing the dye molecules to be arranged perpendicular to the first substrate. The long axis direction of the dye molecules is parallel to the incident direction, and the incident light is hardly absorbed, presenting a uniform bright state. When the content of the chiral additive in the dye liquid crystal layer is relatively high, when a relatively small voltage (V4) is applied to the first electrode and the second electrode, the helical twisting force of the chiral additive plays a dominant role. At the same time, due to the action of the electric field force between the first electrode and the second electrode, the helical degrees formed by the liquid crystal in different regions are different, as Figure 6As shown, the dimming glass is divided into four regions A, B, C, and D. The helical twist degrees formed by the liquid crystal molecules in these four regions are all different. Specifically, A > B > C > D. Correspondingly, the helical degrees formed by the dye molecules induced in each region are different. The light absorption rates of each region are A > B > C > D, and the transmittance rates are A < B < C < D, thus resulting in uneven brightness and defects such as sandy Mura. When a relatively large voltage (V5) is applied to the first electrode and the second electrode, the electric field force increases, and the liquid crystal molecules tend to align parallel to the surface of the first substrate. At the same time, the helical twisting force of the chiral additive acts relatively strongly, causing the liquid crystal aligned parallel to the first substrate to align along the helical axis perpendicular to the substrate surface. The two act simultaneously and balance each other, and the liquid crystal molecules can quickly form a uniform planar helical texture arrangement, as Figure 7 shown. Correspondingly, the dye molecules induced in each region form a uniform helical degree, making the light absorption rates of each region the same, thereby achieving a dark state with uniform transmittance. When the content of the chiral agent in the dye liquid crystal layer is relatively low, a relatively small voltage is applied to the first electrode and the second electrode. The helical twisting force of the chiral additive and the electric field force between the first electrode and the second electrode are both relatively small, and the two balance each other. A uniform helical structure arrangement can be formed in the entire region. However, when a relatively large voltage is applied to the first electrode and the second electrode, the electric field force is greater than the helical twisting force of the chiral additive. After the voltage is applied, the liquid crystal molecules are oriented parallel to the first substrate, but the chiral additive cannot quickly cause the liquid crystal molecules to form the corresponding helical state, and the helical degrees in different regions are different, resulting in uneven defects such as sandy.

[0049] The inventors found that for the dimming glass in the normally white mode, when the content of the chiral additive is relatively high, when a small voltage is applied to the first electrode and the second electrode, it is easy to produce Mura-like defects caused by uneven transmittance, that is, grayscale dimming cannot be achieved. When the content of the chiral additive is relatively low, when a large voltage is applied to the first electrode and the second electrode, it is easy to produce Mura-like defects caused by uneven transmittance, which affects the dark state transmittance and reduces the adjustable range of the product transmittance. Neither of them can meet the customer's requirements for grayscale dimming and low dark state transmittance.

[0050] In view of the above problems, the following technical solutions are provided in the embodiments of the present disclosure.

[0051] In a first aspect, an embodiment of the present disclosure provides a dimming glass, which includes a first substrate, a second substrate, and a dye liquid crystal layer disposed between the first substrate and the second substrate. Among them, the first substrate and the second substrate have the same structure as the above-mentioned first substrate and second substrate. In particular, in the embodiment of the present disclosure, the dye liquid crystal layer not only includes liquid crystal molecules and dye molecules, but also includes a polymer network. The polymer network is formed by the polymerization reaction of polymerizable monomers. The polymer network is used to make the torsional degrees of the liquid crystal molecules in the dye liquid crystal layer approximately the same and the torsional degrees of the dye molecules approximately the same when the electric field generated between the first substrate and the second substrate changes.

[0052] It should be noted here that "substantially the same" means completely the same or substantially the same macroscopically.

[0053] Since the dye liquid crystal layer in the embodiments of the present disclosure includes a polymer network, through its anchoring effect, when the electric field generated between the first substrate and the second substrate changes, that is, when the voltage applied to the first electrode and the second electrode changes, the twisting degrees of the liquid crystal molecules in the dye liquid crystal layer are substantially the same, and the twisting degrees of the dye molecules are substantially the same, so as to avoid the disordered arrangement of the liquid crystal molecules at different positions leading to the disordered arrangement of the dye molecules. Therefore, the transmittance of the dimming glass in the embodiments of the present disclosure is uniform, and there is no uneven phenomenon such as sandy Mura.

[0054] In some embodiments, the dye liquid crystal layer may further include a chiral additive to improve the contrast of the dimming glass. In the following description, the case where the dye liquid crystal layer includes a chiral additive is taken as an example for illustration.

[0055] To make the dimming glass in the embodiments of the present disclosure clearer, the following takes the dimming glass including only one glass module and the dimming glass being in the normally black mode and the normally white mode respectively as examples for illustration.

[0056] In one example, the dimming glass is in the normally black mode. The polymerizable monomers of the polymer network in the dye liquid crystal layer are arranged perpendicular to the plane where the first substrate (the second substrate) is located, that is, the polymer network is a vertical polymer network. By using the induced anchoring effect of the polymer network, a normally black single-Cell dye liquid crystal dimming glass that can realize grayscale dimming and random switching of different grayscales is prepared. Figure 8 This is a schematic cross-sectional structure diagram during the manufacturing process of the dimming glass in the normally black mode in the embodiments of the present disclosure. First, the first substrate and the second substrate are formed. A dye liquid crystal mixture containing positive liquid crystal molecules, dye molecules, chiral additives, polymerizable monomers, and initiators that are uniformly mixed in a certain proportion is dropped on one of the first substrate and the second substrate, and a sealant (sealant) is coated on the other one, and the first substrate and the second substrate are opposed to form a dye liquid crystal cell. At this time, the dye liquid crystal mixture forms a uniform planar spiral texture in the cell, as shown in Figure 8 (a) in the figure. Next, the dye liquid crystal cell is subjected to photo-polymerization or thermal polymerization to cure and bond the first substrate and the second substrate with the sealant, and at the same time ensure that the polymerizable monomers in the dye liquid crystal mixture do not react; a relatively large voltage (V3) is applied to the first substrate and the second substrate to make the liquid crystal molecules and the dye molecules arrange perpendicular to the plane where the first substrate is located. At the same time, the polymerizable monomers are also arranged in the plane where the first substrate is located under the induction of the liquid crystal molecules and the dye molecules, as shown in Figure 8As shown in (b). Subsequently, the dye liquid crystal cell is subjected to photopolymerization or thermal polymerization, and the polymerizable monomers in the dye liquid crystal mixture react to form a polymer network. Due to the induction of liquid crystal molecules, the polymer network at this time is a vertical polymer network parallel to the arrangement of liquid crystal molecules, as shown in Figure 8 (c). Finally, the voltages applied to the first substrate and the second substrate are removed, and the liquid crystal molecules and dye molecules return to the planar spiral arrangement, while the polymer network still presents a vertical structure, thereby fabricating a normally black mode dimming glass with a vertical polymer network, as shown in Figure 8 (d).

[0057] Figure 9 FIG. is a schematic cross-sectional structure diagram of the normally black mode dimming glass of the embodiment of the present disclosure when powered off; as shown in Figure 9 In the figure, the liquid crystal molecules in the dye liquid crystal layer of the dimming glass of this mode present a uniform planar spiral texture arrangement under the action of the chiral additive, the first alignment layer and the second alignment layer. The helical axis is perpendicular to the first substrate and the second substrate, and the liquid crystal molecules and dye molecules are spirally arranged in the plane parallel to the first substrate and the second substrate. The dye molecules can absorb the polarized light incident in all directions, and the light absorption rate of each region is the same, thus presenting a uniform dark state. When a small voltage (V1) is applied to the first electrode and the second electrode, although the helical twisting force of the chiral additive is large and the electric field force between the first substrate and the second substrate is small, due to the existence of the vertical polymer network, the liquid crystal molecules can be induced to align parallel to the polymer network, that is, parallel to the electric field direction, thereby amplifying the action of the electric field force on the liquid crystal molecules, so that the helical twisting force of the chiral additive and the electric field force reach equilibrium, and the entire dye liquid crystal layer forms a uniform inclined spiral texture arrangement, as shown in Figure 10 . Correspondingly, the arrangement and light absorption rate of the dye molecules in different regions are uniform, presenting a uniform gray scale state. Continuing to increase the voltage applied to the first electrode and the second electrode, due to the induction of the vertical polymer network, the helical twisting force and the electric field force in the cell are kept in balance, and the helical texture is uniformly inclined under the action of the electric field force, forming a uniform inclined spiral texture arrangement, achieving uniform transmittance, as shown in Figure 11 . When the maximum voltage is applied to the first electrode and the second electrode, the action of the electric field force is significantly greater than the action of the helical twisting force of the chiral agent, and the liquid crystal molecules unwind to form a field-induced nematic phase, and all the liquid crystal molecules are arranged parallel to the electric field direction, that is, perpendicular to the first substrate and the second substrate, as shown in Figure 12As shown, the corresponding induced dye molecules are arranged perpendicular to the first substrate and the second substrate, with the minimum absorption of incident light, achieving a uniform bright state. When the power is quickly cut off from a high voltage, due to the anchoring effect of the vertical polymer network, the force that promotes the liquid crystal molecules to be arranged perpendicular to the first substrate does not disappear instantaneously, that is, this force gradually disappears, and the liquid crystal molecules are gradually transformed into a planar helical texture under the action of the helical twisting force of the chiral additive, thus avoiding the phenomenon of disordered arrangement (focal conic texture) of the liquid crystal molecules when the power is cut off. The arrangement of the dye molecules in each region is uniform and the light absorption rate is the same, further preventing the phenomenon of uneven voltage reduction and achieving the purpose of arbitrarily switching the gray-scale dimming.

[0058] Figure 13 It is a graph of the transmittance change with voltage (V-T) of a normally black mode dimming glass without a polymer network and with a polymer network; as Figure 13 shown, for the normally black mode dimming glass without a polymer network, the curve of the transmittance change with voltage (V-T) is relatively steep. When the voltage is increased or decreased, the arrangement of liquid crystal molecules, dye molecules, chiral additives, etc. is prone to disorder, resulting in Mura-like defects and unable to achieve gray scale, as shown in S1 in Figure 13 In the embodiment of the present disclosure, for the normally black mode dimming glass with a polymer network, due to the action of the polymer network, the arrangement of liquid crystal molecules, dye molecules and chiral additives can change continuously when the voltage is increased or decreased. The corresponding curve of the transmittance change with voltage (V-T) is relatively gentle, and no Mura-like defects will occur, so gray scale can be achieved; that is, without Mura defects, the transmittance can be adjusted by adjusting the voltage magnitude, thereby adjusting the gray scale, as shown in S2 in Figure 13 In

[0059] In one example, the dimming glass is in the normally black mode. The polymerizable monomers of the polymer network in the dye liquid crystal layer are arranged in a planar helix in the plane of the first substrate (second substrate), that is, the polymer network is a planar helical polymer network. Using the induced anchoring effect of the polymer network, a normally white mode dimming glass that can achieve gray-scale dimming and arbitrarily switch different gray scales is prepared. Figure 14 It is a schematic cross-sectional structure diagram during the manufacturing process of the normally white mode dimming glass according to the embodiment of the present disclosure. First, the first substrate and the second substrate are formed. A dye liquid crystal mixture containing negative liquid crystal molecules, dye molecules, chiral additives, polymerizable monomers and initiators, which is uniformly mixed in a certain proportion, is dropped on one of the first substrate and the second substrate, and a sealant (seal glue) is coated on the other one, and the first substrate and the second substrate are paired to form a dye liquid crystal cell. At this time, the dye liquid crystal mixture is arranged perpendicular to the first substrate and the second substrate in the dye liquid crystal cell, and basically does not absorb incident light, presenting a uniform bright state, as Figure 14As shown in (a). Next, the dye liquid crystal cell is subjected to photopolymerization or thermal polymerization to cure and bond the first substrate and the second substrate with the Seal glue, while ensuring that the polymerizable monomers in the dye liquid crystal mixture do not react; a relatively large voltage (V5) is applied to the first substrate and the second substrate to align the liquid crystal molecules and the dye molecules parallel to the surface of the first substrate, and at the same time, under the action of the chiral additive, they are helically arranged along the helical axis perpendicular to the surface of the first substrate to form a uniform planar helical texture, as Figure 14 shown in (b). After that, the dye liquid crystal cell is subjected to photopolymerization or thermal polymerization, and the polymerizable monomers in the dye liquid crystal mixture react to form a polymer network. Due to the induction of the liquid crystal molecules, the polymer network is similar to the planar helical arrangement of the liquid crystal molecules at this time, that is, a planar helical polymer network, and the helical degree of all polymers is the same, as Figure 14 shown in (c). Finally, the voltage applied to the first substrate and the second substrate is removed, and the liquid crystal molecules and the dye molecules return to be arranged perpendicular to the first substrate, and the polymer network still presents a planar helical structure, thereby manufacturing a normally white mode dimming glass with a planar helical polymer network, as Figure 14 shown in (d).

[0060] Figure 14 is a schematic cross-sectional structure diagram of the normally white mode dimming glass when it is not powered on, as Figure 14 shown. In this mode of dimming glass, the liquid crystal molecules in the dye liquid crystal layer are uniformly arranged perpendicular to the substrate under the action of the chiral additive, the first alignment layer and the second alignment layer, and basically do not absorb the incident light, presenting a uniform bright state. When the content of the chiral additive in the dye liquid crystal layer is relatively high, when a relatively small voltage (V4) is applied to the first electrode and the second electrode, due to the induction of the planar helical polymer network, the liquid crystal molecules will form a uniform inclined helical arrangement while falling down under the action of the electric field, as Figure 16As shown, the degree of twist of liquid crystal molecules in different regions is the same, and correspondingly, the degree of twist of dye molecules is the same, the light absorption rate is the same, that is, the transmittance of each region is the same, and there is no sand-like Mura non-uniformity phenomenon, thus realizing gray-scale dimming. When the content of the chiral additive in the dye liquid crystal layer is low, a relatively large voltage (V5) is applied to the first electrode and the second electrode. The electric field force between the first substrate and the second substrate is greater than the helical twisting force. However, since the planar helical polymer will induce the liquid crystal molecules to be helically arranged, that is, enhance the helical twisting force, so that the electric field force and the helical twisting force are balanced, and a uniform inclined helical arrangement is formed in different regions, avoiding sand-like Mura defects. That is, the normally white mode dimming glass with a planar helical polymer network can achieve a uniform helical arrangement at different voltages regardless of the content of the chiral additive in the dye liquid crystal layer, that is, achieve a uniform transmittance of the entire dye liquid crystal layer, realize gray-scale dimming and the function of randomly switching different gray scales. When the maximum voltage is applied to the first electrode and the second electrode, the electric field force increases, and the liquid crystal molecules tend to be arranged parallel to the surface of the first substrate. At the same time, under the action of the helical twisting force of the chiral additive and the induction of the helical polymer network, the liquid crystal arranged parallel to the first substrate is arranged along the helical axis perpendicular to the surface of the substrate. The two act simultaneously and balance each other, and the liquid crystal molecules can quickly form a uniform planar helical texture arrangement, as Figure 17 shown.

[0061] Figure 18 are the transmittance vs. voltage (V-T) curves of the normally white mode dimming glass without a polymer network and with a polymer network; as Figure 18 shown, for the normally white mode dimming glass without a polymer, the transmittance vs. voltage (V-T) curve is relatively steep. When the voltage is increased or decreased, the arrangement of liquid crystal molecules, dye molecules, chiral additives, etc. is likely to be disordered, resulting in Mura defects and unable to achieve gray scale, as Figure 18 shown in S1 in. In the normally white mode dimming glass with a polymer network in the embodiments of the present disclosure, due to the action of the polymer network, the arrangement of liquid crystal molecules, dye molecules and chiral additives can change continuously when the voltage is increased or decreased. Correspondingly, the transmittance vs. voltage (V-T) curve is relatively gentle and no Mura defects will occur, thus gray scale can be achieved; that is, in the case of no Mura defects, the transmittance can be adjusted by adjusting the voltage magnitude, thereby adjusting the gray scale, as Figure 18 shown in S2 in.

[0062] In some embodiments, the polymerizable monomer that forms the polymer network in the dye liquid crystal layer can be a photopolymerizable monomer or a thermopolymerizable monomer. Since the reaction conditions of the photopolymerizable monomer are easy to control, the polymerizable monomer is preferably a photopolymerizable monomer. The photopolymerizable monomer includes, but is not limited to, ultraviolet (UV) photopolymerizable monomers or photopolymerizable monomers with a specific wavelength. When the polymerizable monomer is a photopolymerizable monomer, the photopolymerizable monomer includes, but is not limited to, acrylic monomers; when the polymerizable monomer is a thermopolymerizable monomer, the thermopolymerizable monomer includes, but is not limited to, epoxy resin monomers.

[0063] In some embodiments, the dye liquid crystal layer is formed from a dye liquid crystal mixture composed of liquid crystal molecules, dye molecules, chiral additives, polymerizable monomers, and initiators, where the type of initiator depends on the type of polymerizable monomer selected. The total content (mass ratio) of the polymerizable monomer in the dye liquid crystal mixture is 1% to 40%, preferably 2% to 5%; the total content (mass ratio) of the chiral additive is 0.2% to 10%, preferably 0.5% to 2%. Of course, the total content of the polymerizable monomer and the total content of the chiral additive in the dye liquid crystal mixture can also be specifically set according to the size of the dimming glass.

[0064] In the embodiments of the present disclosure, Figure 19 is a schematic structural diagram of the liquid crystalline photopolymerizable monomer used in the dimming glass of the embodiments of the present disclosure; as Figure 19 shown, the polymer monomer in the embodiments of the present disclosure can be selected from liquid crystalline photopolymerizable monomers, which include, but are not limited to, C6M [2-methyl-1,4-phenylbis(4-(6-(acryloyloxy)hexyloxy)benzoate)], C6M0 [1,4-phenylbis(4-(6-(acryloyloxy)hexyloxy)benzoate)], C3M [1,4-phenylbis(4-(3-(acryloyloxy)propoxy)benzoate)], 2CM [biphenyl-4,4'-diacryl diacrylate], etc. Figure 20 is a schematic structural diagram of the chiral liquid crystalline photopolymerizable monomer used in the dimming glass of the embodiments of the present disclosure; as Figure 20 shown, the polymer monomer in the embodiments of the present disclosure can be selected from chiral liquid crystalline photopolymerizable monomers, which include, but are not limited to, DCM [1,4-phenylbis(4-(6-(acryloyloxy)-3-methylhexyloxy)benzoate)], SCM [2-methylbutyl 4'-(4-(6-(acryloyloxy)hexyloxy)phenoxy)biphenyl-4-carboxylate], etc. Figure 21 is a schematic structural diagram of the liquid crystalline photoinitiator used in the dimming glass of the embodiments of the present disclosure; as Figure 21As shown, the initiator in the embodiments of the present disclosure can be selected from liquid crystal photoinitiators, including but not limited to IRG651 [2,2-dimethoxy-1,2-diphenylethanone], IRG369 [2-benzyl-2-(dimethylamino)-1-(4-morpholinophenyl)butane], IRG184 [(1-hydroxycyclohexyl)(phenyl)methanol], IRG919 [methylene(phenyl(3,4,5-trimethylbenzoyl)phosphate)methanol], etc. Figure 22 is a schematic structural diagram of the thermal polymerization monomer used in the dimming glass of the embodiments of the present disclosure; as Figure 22 shown, the polymer monomer in the embodiments of the present disclosure can be a thermal polymerization monomer, including but not limited to DGEBF [1,3-bis(4-(oxan-2-ylmethoxy)benz)phenoxy)propane-2-ol], PACM [4,4'-methylenebiscyclohexylamine], EGDE [1,2-bis(oxan-2-ylmethoxy)ethane], EDBEA [2,2'-(ethane-1,2-diylbis(oxy))diethanolamine], etc. Figure 23 is a schematic structural diagram of the chiral additive used in the dimming glass of the embodiments of the present disclosure; as Figure 23 shown, the chiral additives in the embodiments of the present disclosure include but not limited to CB15 [4'-(2-methylbutyl)biphenyl-4-carbonitrile], C15 [4'-sec-butoxybiphenyl-4-carbonitrile], CN [10,13-dimethyl-17-(octan-2-yl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl nanolate], S811 / R811 [6-methyloctan-2-yl 4-(4-(hexyloxy)benzoyloxy)benzoate], ZLI-4571 / ZLI-4572 [1-phenylethane-1,2-diacylbis(4-(4-pentylcyclohexyl)benzoate)], BPH [1,1'-binaphthalene-2,2'-diacylbis(4'-(2-methylbutyl)biphenyl-4-carboxylate)], etc. ss

[0065] In some embodiments, the first substrate includes: a first substrate, a first electrode and a first alignment layer sequentially disposed on one side of the first substrate close to the dye liquid crystal layer; the second substrate includes: a second substrate, a second electrode and a second alignment layer sequentially disposed on one side of the second substrate close to the dye liquid crystal layer; wherein, both the first electrode and the second electrode can be plate-shaped electrodes. At this time, the formed dye liquid crystal cell is a VA-mode liquid crystal cell. Of course, one of the first electrode and the second electrode can also be a strip-shaped electrode and the other can be a planar electrode. In the embodiments of the present disclosure, the positions and structures of the first electrode and the second electrode are not limited, as long as the first electrode and the second electrode can cause the liquid crystal molecules of the dye liquid crystal layer to deflect after being applied with a voltage.

[0066] In some embodiments, the number of dimming modules in the dimming glass may also be multiple, and the multiple dimming modules are stacked. Each dimming module may adopt any of the above structures. The dimming glass with multiple dimming modules can achieve the adjustment of more gray-scale brightness levels.

[0067] The embodiments of the present disclosure also provide a method for manufacturing a dimming glass, which can be used to manufacture the above dimming glass. The method for manufacturing the dimming glass in the embodiments of the present disclosure includes the step of forming a dimming module; the step of forming a dimming module includes: forming a first substrate, a second substrate, and forming a dye liquid crystal layer between the first substrate and the second substrate; wherein, a polymer network is formed in the dye liquid crystal layer, so that when the electric field generated between the first substrate and the second substrate changes, the twisting degrees of the respective liquid crystal molecules in the dye liquid crystal layer are substantially the same, and the twisting degrees of the respective dye molecules are substantially the same.

[0068] Since the dye liquid crystal layer in the embodiments of the present disclosure includes a polymer network, through its anchoring effect, when the electric field generated between the first substrate and the second substrate changes, that is, when the voltages applied to the first electrode and the second electrode change, the twisting degrees of the respective liquid crystal molecules in the dye liquid crystal layer are substantially the same, and the twisting degrees of the respective dye molecules are substantially the same, so as to avoid the disordered arrangement of the liquid crystal molecules at different positions leading to the disordered arrangement of the dye molecules. Therefore, the transmittance of the dimming glass in the embodiments of the present disclosure is uniform, and there is no uneven phenomenon such as sandy Mura.

[0069] To more clearly illustrate the dimming glass in the embodiments of the present disclosure, the following takes the dimming glass including only one glass module and the dimming glass being in the normally black mode and the normally white mode respectively as examples for description.

[0070] In one example, the dimming glass is in the normally black mode. Figure 24 It is a schematic flow chart in the manufacturing process of the dimming glass in the normally black mode in the embodiments of the present disclosure. As Figure 24 shown, the manufacturing method includes the following steps:

[0071] S1. Uniformly mix positive liquid crystal molecules, dye molecules, chiral additives, polymerizable monomers and initiators in a certain proportion to form a dye liquid crystal mixture.

[0072] S2. Form a first electrode on a first substrate, coat a PI solution on the surface of the first electrode facing away from the first substrate, and perform a Rubbing process to form a first alignment layer that can induce liquid crystal molecules on the first substrate, thereby forming a first substrate; similarly, form a second electrode on a second substrate, coat a PI solution on the surface of the second electrode facing away from the second substrate, and perform a Rubbing process to form a second alignment layer that can induce liquid crystal molecules on the second substrate, thereby forming a second substrate.

[0073] S3. Drop a dye - liquid crystal mixture, which is a homogeneous mixture of positive liquid - crystal molecules, dye molecules, chiral additives, polymerizable monomers, and initiators in a certain proportion, onto one of the first substrate and the second substrate. Apply a sealant (seal glue) to the other one, and align the first substrate and the second substrate to form a dye - liquid crystal cell. At this time, the dye - liquid crystal mixture forms a uniform planar spiral texture in the cell, thus forming a dye - liquid crystal cell.

[0074] S4. Carry out photopolymerization or thermal polymerization on the dye - liquid crystal cell to cure the Seal glue and bond the first substrate and the second substrate, while ensuring that the polymerizable monomers in the dye - liquid crystal mixture do not react.

[0075] S5. Apply a voltage to the first electrode and the second electrode to align the liquid - crystal molecules and dye molecules perpendicular to the plane of the first substrate. At the same time, the polymerizable monomers are also induced by the liquid - crystal molecules and dye molecules to be arranged in the plane of the first substrate. Carry out photopolymerization or thermal polymerization on the dye - liquid crystal cell. The polymerizable monomers in the dye - liquid crystal mixture react to form a polymer network. Due to the induction of the liquid - crystal molecules, the polymer network at this time is a vertical polymer network parallel to the arrangement of the liquid - crystal molecules.

[0076] S6. Remove the voltage applied to the first electrode and the second electrode. The liquid - crystal molecules and dye molecules return to the planar spiral arrangement, and the polymer network still presents a vertical structure, thus manufacturing a normally - black - mode dimming glass with a vertical polymer network.

[0077] Here, it should be noted that the order of steps S1 and S2 above can be interchanged.

[0078] The following gives two specific examples of preparing a normally - black - mode dimming glass.

[0079] In one example, the preparation method of a normally - black - mode dimming glass specifically includes the following steps:

[0080] S1. Mix the dye - liquid crystal molecule MDA - 18 - 1670, chiral additive ZLI - 4571, polymerizable monomer C3M, and photo - initiator IRG184 evenly according to a mass ratio of 91.9% / 1.5% / 6% / 0.6% to make a dye - liquid crystal mixture.

[0081] S2. Form a first electrode on a first substrate, coat SE-7953PI liquid on the surface of the first electrode facing away from the first substrate, and perform a Rubbing process to form a first alignment layer that can induce liquid crystal molecules on the first substrate, thus forming a first substrate; similarly, form a second electrode on a second substrate, coat SE-7953PI liquid on the surface of the second electrode facing away from the second substrate, and perform a Rubbing process to form a second alignment layer that can induce liquid crystal molecules on the second substrate, thus forming a second substrate.

[0082] S3. Drop the dye liquid crystal mixture formed in step S1 onto one of the first substrate and the second substrate, coat SWB-101R Sealant on the other substrate, and pair the first substrate and the second substrate to form a dye liquid crystal cell.

[0083] S4. Perform photopolymerization or thermal polymerization on the dye liquid crystal cell to cure the Sealant to bond the first substrate and the second substrate, while ensuring that the polymerizable monomers in the dye liquid crystal mixture do not react.

[0084] S5. Apply a voltage to the first electrode and the second electrode of the dye liquid crystal cell completed in step S4 to align the liquid crystal molecules and the dye molecules perpendicular to the first substrate and the second substrate. At this time, perform photopolymerization, with the ultraviolet light wavelength being 365 nm and the polymerization intensity being 10 mW / cm 2 , and the time being 20 min, to cause the polymerizable monomers in the dye liquid crystal mixture to react to form a vertical polymer network.

[0085] S6. Remove the voltage applied to the first electrode and the second electrode. The liquid crystal molecules and the dye molecules return to a planar helical arrangement, and the polymer network still presents a vertical structure, thereby fabricating a normally black mode dimming glass with a vertical polymer network.

[0086] In another example, the preparation method of the normally black mode dimming glass specifically includes the following steps:

[0087] S1. Mix the dye liquid crystal (dye molecules + liquid crystal molecules) MDA-18-1670, chiral additive BPH, polymerizable monomer DGEBF, and polymerizable monomer PACM evenly according to a mass ratio of 89.5% / 0.5% / 5% / 5% to prepare a dye liquid crystal mixture.

[0088] S2. Form a first electrode on the first substrate, coat SE-7451PI liquid on the surface of the first electrode facing away from the first substrate, and perform a Rubbing process to form a first alignment layer that can induce liquid crystal molecules on the first substrate, thereby forming a first substrate; similarly, form a second electrode on the second substrate, coat SE-7451PI liquid on the surface of the second electrode facing away from the second substrate, and perform a Rubbing process to form a second alignment layer that can induce liquid crystal molecules on the second substrate, thereby forming a second substrate.

[0089] S3. Drop the dye liquid crystal mixture formed in step S1 onto one of the first substrate and the second substrate, coat SWB-73R Sealant on the other, and pair the first substrate and the second substrate to form a dye liquid crystal cell.

[0090] S4. Carry out photopolymerization or thermal polymerization on the dye liquid crystal cell to cure and bond the first substrate and the second substrate with the Sealant, while ensuring that the polymerizable monomers in the dye liquid crystal mixture do not react.

[0091] S5. Apply a voltage to the first electrode and the second electrode of the dye liquid crystal cell completed in step S4 to align the liquid crystal molecules and the dye molecules perpendicular to the first substrate and the second substrate. At this time, carry out thermal polymerization under the condition of 40 °C / 40 min to cause the polymerizable monomers in the dye liquid crystal mixture to react to form a vertical polymer network.

[0092] S6. Remove the voltage applied to the first electrode and the second electrode. The liquid crystal molecules and the dye molecules return to a planar spiral arrangement, and the polymer network still presents a vertical structure, thereby manufacturing a normally black mode dimming glass with a vertical polymer network.

[0093] In one example, the dimming glass is in a normally white mode. Figure 25 It is a schematic flow chart during the manufacturing process of the normally white mode dimming glass in the embodiments of the present disclosure. As Figure 25 shown, the manufacturing method includes the following steps:

[0094] S1. Uniformly mix negative liquid crystal molecules, dye molecules, chiral additives, polymerizable monomers, and initiators in a certain proportion to form a dye liquid crystal mixture.

[0095] S2. Form a first electrode on the first substrate, coat PI liquid on the surface of the first electrode facing away from the first substrate, and perform a Rubbing process to form a first alignment layer that can induce liquid crystal molecules on the first substrate, thereby forming a first substrate; similarly, form a second electrode on the second substrate, coat PI liquid on the surface of the second electrode facing away from the second substrate, and perform a Rubbing process to form a second alignment layer that can induce liquid crystal molecules on the second substrate, thereby forming a second substrate.

[0096] S3. Drop a dye - liquid crystal mixture, which is a homogeneous mixture of negative liquid - crystal molecules, dye molecules, chiral additives, polymerizable monomers, and initiators in a certain proportion, onto one of the first substrate and the second substrate. Apply a sealant (seal glue) to the other one, and pair - box the first substrate and the second substrate to form a dye - liquid crystal cell. At this time, the dye - liquid crystal mixture aligns perpendicular to the first substrate and the second substrate inside the dye - liquid crystal cell, hardly absorbs incident light, and presents a uniform bright state.

[0097] S4. Carry out photopolymerization or thermal polymerization on the dye - liquid crystal cell to cure the sealant to bond the first substrate and the second substrate, while ensuring that the polymerizable monomers in the dye - liquid crystal mixture do not react.

[0098] S5. Apply voltages to the first electrode and the second electrode to make the liquid - crystal molecules and the dye molecules align parallel to the surface of the first substrate. At the same time, under the action of the chiral additive, they helically arrange along the helical axis perpendicular to the surface of the first substrate to form a uniform planar - helical - textured polymer network.

[0099] S6. Remove the voltages applied to the first electrode and the second electrode. The liquid - crystal molecules and the dye molecules return to align perpendicular to the first substrate, and the polymer network still presents a planar - helical structure, thus fabricating a normally - white - mode dimming glass with a planar - helical polymer network.

[0100] It should be noted here that the order of steps S1 and S2 above can be swapped.

[0101] The following gives two specific examples of preparing a normally - white - mode dimming glass.

[0102] In one example, the preparation method of the normally - white - mode dimming glass specifically includes the following steps:

[0103] S1. Mix the dye - liquid crystal MDA - 18 - 2219, chiral additive R811, polymerizable monomer C6M, and photo - initiator IRG651 evenly according to a mass ratio of 92.5 / 2% / 5% / 0.5% to make a dye - liquid crystal mixture.

[0104] S2. Form a first electrode on the first substrate. Coat the DL - 4018PI solution on the surface of the first electrode facing away from the first substrate, and perform a Rubbing process to form a first alignment layer that can induce liquid - crystal molecules on the first substrate, thus forming a first substrate. Similarly, form a second electrode on the second substrate. Coat the DL - 4018PI solution on the surface of the second electrode facing away from the second substrate, and perform a Rubbing process to form a second alignment layer that can induce liquid - crystal molecules on the second substrate, thus forming a second substrate.

[0105] S3. Drop the dye liquid crystal mixture formed in step S1 onto one of the first substrate and the second substrate, coat the other with SWB-73 Sealant, and align the first substrate and the second substrate to form a dye liquid crystal cell.

[0106] S4. Carry out photo-polymerization or thermal polymerization on the dye liquid crystal cell to cure and bond the first substrate and the second substrate with the Sealant, while ensuring that the polymerizable monomers in the dye liquid crystal mixture do not react.

[0107] S5. Apply voltage to the first electrode and the second electrode to align the liquid crystal molecules and the dye molecules parallel to the first substrate, and form a helix under the action of the chiral additive, that is, a planar helix arrangement. At this time, carry out ultraviolet polymerization with an ultraviolet light wavelength of 365 nm and a polymerization intensity of 8 mW / cm 2 , for 30 minutes, to make the polymerizable monomers in the dye liquid crystal mixture react to form a planar helix polymer network.

[0108] S6. Remove the voltage applied to the first electrode and the second electrode, and the liquid crystal molecules and the dye molecules return to an arrangement perpendicular to the substrate, to produce a dimming glass with a planar helix polymer network that can achieve grayscale and has a normally white mode.

[0109] In another embodiment, the preparation method of the dimming glass with a normally white mode includes the following steps:

[0110] S1. Mix the dye liquid crystal MDA-18-2219, chiral additive CB15, polymerizable monomer C6M, polymerizable monomer DCM, and photoinitiator IRG651 evenly according to a mass ratio of 87.5 / 1.5% / 3% / 7% / 1.0% to prepare a dye liquid crystal mixture.

[0111] S2. Form a first electrode on the first substrate, coat SE-4811 PI solution on the surface of the first electrode facing away from the first substrate, and carry out a Rubbing process to form a first alignment layer that can induce liquid crystal molecules on the first substrate, thus forming a first substrate; similarly, form a second electrode on the second substrate, coat SE-4811 PI solution on the surface of the second electrode facing away from the second substrate, and carry out a Rubbing process to form a second alignment layer that can induce liquid crystal molecules on the second substrate, thus forming a second substrate.

[0112] S3. Drop the dye liquid crystal mixture formed in step S1 onto one of the first substrate and the second substrate, coat the other with SWB-101 Sealant, and align the first substrate and the second substrate to form a dye liquid crystal cell.

[0113] S4. Carry out photo-polymerization or thermal polymerization on the dye liquid crystal cell to cure and bond the first substrate and the second substrate with the Sealant, while ensuring that the polymerizable monomers in the dye liquid crystal mixture do not react.

[0114] S5. Apply voltages to the first electrode and the second electrode to align the liquid crystal molecules and the dye molecules parallel to the first substrate, and form a helix, i.e., a planar helix arrangement, under the action of the chiral additive. At this time, ultraviolet polymerization is carried out. The wavelength of the ultraviolet light is 365 nm, and the polymerization intensity is 15 mW / cm 2 , and the time is 10 min to cause the polymerizable monomers in the dye-liquid crystal mixture to react to form a planar helix polymer network.

[0115] S6. Remove the voltages applied to the first electrode and the second electrode, and the liquid crystal molecules and the dye molecules return to the arrangement perpendicular to the substrate, thus manufacturing a dimming glass with a planar helix polymer network that can achieve grayscale and has a normally white mode.

[0116] In a second aspect, an embodiment of the present invention further provides a glass assembly, which includes the above-mentioned dimming glass.

[0117] This glass module can be applied to transportation facilities such as automobiles, trains, and airplanes. It can also be applied to intelligent building windows. Since the intelligent window in the embodiment of the present invention includes the above-mentioned dimming glass, its dark state transmittance is relatively low, the CR is relatively high, and the intelligent window is relatively thin and light.

[0118] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A dimming glass, comprising at least one dimming module; the dimming module includes a first substrate and a second substrate disposed opposite to each other, and a dye liquid crystal layer disposed between the first substrate and the second substrate; the dye liquid crystal layer is configured to be flipped under the control of an electric field generated between the first substrate and the second substrate to control the light transmittance; Characterized in that, a first alignment layer is disposed on one side of the first substrate close to the dye liquid crystal layer; the dye liquid crystal layer includes a polymer network, configured to make the twisting degrees of the respective liquid crystal molecules in the dye liquid crystal layer substantially the same and the twisting degrees of the respective dye molecules substantially the same when the electric field generated between the first substrate and the second substrate changes.

2. The dimming glass according to claim 1, Characterized in that, the dimming glass is in a normally black mode; the polymerizable monomers of the polymer network are arranged perpendicular to the plane where the first substrate is located.

3. The dimming glass according to claim 1, Characterized in that, the dimming glass is in a normally white mode; the polymerizable monomers of the polymer network are arranged in a planar spiral.

4. The dimming glass according to claim 1, Characterized in that, the number of the dimming modules is only one, and a chiral additive is further included in the dye liquid crystal layer.

5. The dimming glass according to claim 4, Characterized in that, the mass ratio of the chiral additive in the dye liquid crystal layer is 0.2% to 10%.

6. The dimming glass according to any one of claims 1-5, Characterized in that, the polymerizable monomers of the polymer network include photopolymerizable monomers or thermopolymerizable monomers.

7. The dimming glass according to claim 6, Characterized in that, the photopolymerizable monomers include acrylate monomers; the thermopolymerizable monomers include epoxy resin monomers.

8. The dimming glass according to any one of claims 1-5, Characterized in that, the mass ratio of the polymerizable monomers of the polymer network in the dye liquid crystal layer is 1% to 40%.

9. The dimming glass according to claim 1, Characterized in that, the number of the dimming modules is multiple, and the multiple dimming modules are stacked.

10. The dimming glass according to claim 1, Characterized in that, the first substrate includes a first base and a first electrode disposed on one side of the first base close to the dye liquid crystal layer; the second substrate includes a second base and a second electrode disposed on one side of the second base close to the dye liquid crystal layer; wherein, both the first electrode and the second electrode are plate-shaped electrodes.

11. The dimming glass according to claim 1, Characterized in that, the first substrate includes a first base and a first electrode disposed on one side of the first base close to the dye liquid crystal layer; the second substrate includes a second base and a second electrode disposed on one side of the second base close to the dye liquid crystal layer; wherein, one of the first electrode and the second electrode is a plate-shaped electrode and the other is a strip-shaped electrode.

12. A glass assembly, Characterized in that, it includes the dimming glass according to any one of claims 1-11.

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