Dimming glass

Abstract

The present invention provides a dimming glass, belonging to the technical field of display windows. The dimming glass of the present invention comprises: a basic dimming structure and a functional dimming structure arranged in layers; wherein the basic dimming structure is used to adjust the transmittance of light irradiated thereon; and the functional dimming structure is used to reflect light of a specific wavelength band irradiated thereon.

Description

Technical Field

[0001] The invention belongs to the technical field of display windows, and in particular relates to a dimming glass. Background Art

[0002] At present, dimming glass is increasingly used in the fields of architecture and transportation. Customers such as automobiles, high-speed rail, and passenger aircraft are interested in dye liquid crystal dimming glass. In the existing smart glass market, there are products such as PDLC smart glass and electrochromic smart glass. PDLC smart glass can only switch between transparency and haze, without light shielding or heat insulation; electrochromic smart glass has problems such as complex film process, slow response time (8 to 20s), and blue color in the dark state. Dye liquid crystal dimming glass uses the selective absorption of light by dichroic dye molecules in liquid crystal to achieve switching between bright and dark states. Compared with existing PDLC and electrochromic smart glass, it has greatly improved optical properties such as black state purity and response time. However, existing dye liquid crystal dimming glass can only adjust the black state, bright state and grayscale state, that is, it can only adjust the transmittance of glass to visible light, and cannot meet more user needs. Summary of the invention

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

[0004] The technical solution adopted to solve the technical problem of the present invention is a dimming glass, including: a basic dimming structure and a functional dimming structure arranged in layers; wherein:

[0005] The basic dimming structure is used to adjust the transmittance of the light shining thereon;

[0006] The functional dimming structure is used to reflect light of a specific wavelength band irradiated thereon.

[0007] Preferably, the functional dimming structure comprises: a first substrate and a second substrate arranged opposite to each other, and a first liquid crystal layer sandwiched between the first substrate and the second substrate; wherein,

[0008] The first liquid crystal layer is used to reflect light of a specific wavelength band under the action of the electric field generated between the first substrate and the second substrate.

[0009] Preferably, the first liquid crystal layer includes a bistable liquid crystal layer.

[0010] Preferably, the first substrate comprises a first base, and a first electrode arranged on a side of the first base close to the bistable liquid crystal layer;

[0011] The second substrate comprises: a second base, and a second electrode disposed on a side of the second base close to the bistable liquid crystal layer; wherein,

[0012] The first electrode and the second electrode are both plate-shaped electrodes.

[0013] Preferably, the first substrate includes a first base, and a first electrode disposed on a side of the first base close to the first liquid crystal layer;

[0014] The second substrate comprises: a second base, and a second electrode disposed on a side of the second base close to the bistable liquid crystal layer; wherein,

[0015] The first electrode and the second electrode are both slit electrodes and are cross-arranged.

[0016] Preferably, the first substrate comprises a first base, and a first electrode arranged on a side of the first base close to the bistable liquid crystal layer;

[0017] The second substrate comprises: a second base, and a second electrode disposed on a side of the second base close to the bistable liquid crystal layer; wherein,

[0018] At least one of the first substrate and the second substrate close to the basic dimming structure is a flexible substrate.

[0019] Preferably, the basic dimming structure comprises: a third substrate, a fourth substrate, and a second liquid crystal layer sandwiched between the third substrate and the fourth substrate; wherein,

[0020] The second liquid crystal layer includes basic liquid crystal molecules and dichroic dye molecules, and is used to be flipped under the control of the electric field generated between the third substrate and the fourth substrate to control the transmittance of light.

[0021] Preferably, the second liquid crystal layer contains a chiral additive.

[0022] Preferably, the third substrate comprises a third base, and a third electrode arranged on a side of the third base close to the liquid crystal layer;

[0023] The fourth substrate comprises: a fourth base, and a fourth electrode disposed on a side of the fourth base close to the second liquid crystal layer; wherein,

[0024] The third electrode and the fourth electrode are both plate-shaped electrodes.

[0025] Preferably, the basic dimming structure comprises: a third substrate, a fourth substrate, and an electrochromic layer sandwiched between the third substrate and the fourth substrate; wherein,

[0026] The electrochromic layer controls whether light can pass through under the control of the electric field generated between the third substrate and the fourth substrate.

[0027] Preferably, the functional dimming structure comprises: a first substrate and a second substrate arranged opposite to each other, a first electrode arranged on a side of the first substrate close to the second substrate, a second electrode arranged on a side of the second substrate close to the first substrate, and a first liquid crystal layer arranged between the first electrode and the second electrode;

[0028] The basic dimming structure comprises a third substrate and a fourth substrate arranged opposite to each other, a third electrode arranged on a side of the third substrate close to the fourth substrate, a fourth electrode arranged on a side of the fourth substrate close to the third substrate, and a second liquid crystal layer arranged between the third electrode and the fourth electrode; wherein,

[0029] The second substrate is common to the third substrate.

[0030] Preferably, the functional dimming structure comprises: a first substrate and a second substrate arranged opposite to each other, a first electrode arranged on a side of the first substrate close to the second substrate, a second electrode arranged on a side of the second substrate close to the first substrate, and a first liquid crystal layer arranged between the first electrode and the second electrode;

[0031] The basic dimming structure comprises a third substrate and a fourth substrate arranged opposite to each other, a third electrode arranged on a side of the third substrate close to the fourth substrate, a fourth electrode arranged on a side of the fourth substrate close to the third substrate, and an electrochromic layer arranged between the third electrode and the fourth electrode; wherein,

[0032] The second substrate is common to the third substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the basic dimming structure in the dimming glass of Example 2 of the present invention in a bright state and a bistable liquid crystal in a P state;

[0034] Figure 2 It is a structural schematic diagram of the basic dimming structure in the dimming glass of Example 2 of the present invention in a bright state and a bistable liquid crystal in an H state;

[0035] Figure 3 It is a structural schematic diagram of the dimming glass of Example 2 of the present invention, in which the basic dimming structure is in a dark state and the bistable liquid crystal is in an H state;

[0036] Figure 4 It is a structural schematic diagram of the dimming glass of Example 2 of the present invention, in which the basic dimming structure is in a dark state and the bistable liquid crystal is in an FC state;

[0037] Figure 5 It is a structural schematic diagram of the basic dimming structure in the dimming glass of Example 3 of the present invention in a bright state and a bistable liquid crystal in a P state;

[0038] Figure 6 It is a structural schematic diagram of the basic dimming structure in the dimming glass of Example 3 of the present invention being in a dark state and the bistable liquid crystal being in a P state;

[0039] Figure 7 It is a structural schematic diagram of the basic dimming structure in the dimming glass of Example 3 of the present invention in a bright state and the bistable liquid crystal in an H state;

[0040] Figure 8 It is a structural schematic diagram of the basic dimming structure in the dimming glass of Example 3 of the present invention being in a dark state and the bistable liquid crystal being in an H state;

[0041] Fig. 9 It is a structural schematic diagram of the dimming glass of Example 3 of the present invention, in which the basic dimming structure is in a dark state and the bistable liquid crystal is in an FC state;

[0042] Fig.10 A schematic diagram of the structure of the first electrode and the second electrode in the functional dimming structure of Embodiment 3 or 4 of the present invention;

[0043] Fig.11 This is a schematic diagram of the structure of the dimming glass according to Example 5 of the present invention.

[0044] The figures are marked as follows: 10, functional dimming structure; 20, basic dimming structure; 30, bonding layer; 11, first substrate; 12, second substrate; 13, first electrode; 14, second electrode; 15, first orientation layer; 16, second orientation layer; 17, first liquid crystal layer; 21, third substrate; 22, fourth substrate; 23, third electrode; 24, fourth electrode; 25, third orientation layer; 26, fourth orientation layer; 27, second liquid crystal layer. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0047] The so-called bistable liquid crystal in the following embodiments can present a P state (planar state), an H state (isotropic state), and a FC state (focal conic state) under the action of an electric field.

[0048] Among them, if an electric field of a certain intensity is applied to the P-state bistable liquid crystal, the bistable liquid crystal can be converted from the P state to the FC state, and its spiral axis distribution is disordered, and the basic orientation is parallel to the substrate. When this electric field becomes zero, the FC state constitutes another zero-field stable state under certain conditions. The periodicity of the spiral structure of the bistable liquid crystal in the FC state no longer exists, and it presents a multi-domain state, but the spiral structure in each domain still exists, so it scatters the incident light. If a sufficiently high electric field is applied to the liquid crystal, the liquid crystal will change to the H state, in which the molecules are arranged along the direction of the electric field, and the liquid crystal is transparent. For the bistable liquid crystal in the H state, when the voltage drops rapidly to zero, the liquid crystal molecules return to the P state; when the voltage is slowly reduced, the liquid crystal molecules change to the FC state.

[0049] Embodiment 1:

[0050] This embodiment provides a dimming glass, including a basic dimming structure and a functional dimming structure that are stacked; wherein the basic dimming structure is used to adjust the transmittance of light irradiated thereon; and the functional dimming structure is used to reflect light of a specific wavelength band irradiated thereon.

[0051] In the prior art, the dimming glass usually only includes one dimming structure to adjust the transmittance of light passing therethrough; while the dimming glass in this embodiment is composed of a basic dimming structure and a functional dimming structure, wherein the basic dimming structure can adjust the transmittance of light irradiated thereon, and the functional dimming structure can reflect light of a specific wavelength band irradiated thereon. Therefore, through the cooperation of these two dimming structures, not only the transmittance of light can be adjusted, but also part of the light can be selected to be transmitted, so as to improve the user experience.

[0052] The specific structure of the dimming glass in this embodiment and the functions that can be achieved by the dimming glass are specifically described in conjunction with the following embodiments.

[0053] Embodiment 2:

[0054] Combination Figure 1-4 As shown, this embodiment provides an infrared-proof smart dimming glass, including a basic dimming structure 20 and a functional dimming structure 10 arranged in layers; wherein the basic dimming structure 20 and the functional dimming structure 10 can be connected together by a bonding layer 30. The basic dimming structure 20 can control the transmittance of light passing therethrough; the functional dimming structure 10 reflects infrared light under certain circumstances.

[0055] A specific structure of an infrared-proof smart dimming glass is given below, wherein both the basic dimming structure 20 and the functional dimming structure 10 can adopt a liquid crystal box structure.

[0056] Specifically, the functional dimming structure 10 may include a first substrate and a second substrate disposed opposite to each other, and a first liquid crystal layer 17 sandwiched between the first substrate and the second substrate; the first liquid crystal layer 17 may use a bistable liquid crystal that can reflect infrared light. Under the action of the electric field between the first substrate and the second substrate, the bistable liquid crystal may be in a P state, an H state, or an FC state.

[0057] In order to make the functional dimming structure 10 more clear, a specific functional dimming structure 10 is given below. The first substrate of the functional dimming structure 10 includes a first substrate 11, and a first electrode 13 and a first orientation layer 15 are sequentially arranged on the first substrate 11; the second substrate of the functional dimming structure 10 is arranged opposite to the first substrate, and the second substrate includes a second substrate 12, and a second electrode 14 and a second orientation layer 16 are sequentially arranged on the side of the second substrate 12 close to the first substrate 11; the first liquid crystal layer 17 is filled between the first orientation layer 15 and the second orientation layer 16; wherein the first liquid crystal layer 17 may specifically include a bistable liquid crystal that reflects infrared light.

[0058] When the bistable liquid crystal is in the P state, visible light can pass through the functional dimming structure 10 normally, while infrared light is reflected by the bistable liquid crystal; when the bistable liquid crystal is in the H state, both visible light and infrared light can pass through the functional dimming structure 10; when the bistable liquid crystal is in the FC state, visible light and infrared light are scattered.

[0059] The first electrode 13 and the second electrode 14 may both be plate-shaped electrodes.

[0060] Specifically, the basic dimming structure 20 includes: a third substrate and a fourth substrate arranged opposite to each other, and a second liquid crystal layer 27 sandwiched between the third substrate and the fourth substrate; wherein the second liquid crystal layer 27 is used to deflect under the control of the electric field generated between the third substrate and the fourth substrate, thereby controlling the transmittance of light passing through the second liquid crystal layer 27.

[0061] In order to make the above basic dimming structure 20 clearer, a specific basic dimming structure 20 is given below. The third substrate of the basic dimming structure 20 includes a third substrate 21, a third electrode 23 and a third orientation layer 25 arranged on the third substrate 21 in sequence; the fourth substrate of the basic dimming structure 20 includes a fourth substrate 22 arranged opposite to the third substrate 21, and a fourth electrode 24 and a fourth orientation layer 26 arranged on the side of the fourth substrate 22 close to the third substrate 21 in sequence; the second liquid crystal layer 27 is filled between the third orientation layer 25 and the fourth orientation layer 26; wherein the second liquid crystal layer 27 includes dye liquid crystal, that is, dichroic dye molecules are doped in the liquid crystal molecules. wherein the third electrode 23 and the fourth electrode 24 are both plate-shaped electrodes, that is, the basic dimming structure 20 is a VA type liquid crystal box. the pre-tilt angles of the third orientation layer 25 and the fourth orientation layer 26 are perpendicular to each other. When the third electrode 23 and the fourth electrode 24 are not powered, the liquid crystal molecules and the dichroic dye molecules in the second liquid crystal layer 27 are arranged perpendicular to the third substrate and the fourth substrate, allowing the incident light to pass through, and the basic dimming structure 20 is in a bright state. When the third electrode 23 and the fourth electrode 24 are powered and the electric field generated between the third electrode 23 and the fourth electrode 24 controls the liquid crystal molecules and the dichroic dye molecules to be arranged parallel to the third substrate and the fourth substrate, and absorbs the incident light along the long axis direction of the dichroic dye molecules, so that the basic dimming structure 20 is in a dark state. Of course, when the third electrode 23 and the fourth electrode 24 are powered and the electric field generated between the third electrode 23 and the fourth electrode 24 controls the liquid crystal molecules and the dichroic dye molecules to be arranged tilted relative to the third substrate and the fourth substrate, part of the light can pass through the basic dimming structure 20, so that the basic dimming structure 20 is in a grayscale state.

[0062] In order to reduce the dark state transmittance of the basic dimming structure 20 and increase the contrast, a chiral additive is preferably added to the second liquid crystal layer 27 .

[0063] As the first case in this embodiment, Figure 1 As shown, when the basic dimming structure 20 is in the bright state and the bistable liquid crystal in the functional dimming structure 10 is in the P state, visible light can pass through the dimming glass normally, while infrared light is reflected by the bistable liquid crystal, and the infrared-proof smart dimming glass is in the infrared-proof mode, thereby achieving the infrared-proof effect. This type of dimming glass can be applied to buildings, car windows and other fields. When it is hot in summer, while turning on the light transmission, the infrared-proof mode can be turned on to prevent infrared light from entering the room or car window, lowering the indoor temperature, and reducing the energy consumption of the indoor or car air conditioner, achieving energy-saving effects.

[0064] As the second case in this embodiment, Figure 2 As shown, when the basic dimming structure 20 is in the bright state and the bistable liquid crystal in the functional dimming structure 10 is in the H state, both visible light and infrared light can pass through the dimming glass. When it is cold in winter, the dimming glass is in this state, and infrared rays are irradiated into the room or car room, raising the indoor temperature, which can reduce the indoor air conditioning energy consumption and achieve energy saving effect.

[0065] As the third case in this embodiment, Figure 3 As shown, when the basic dimming structure 20 is in the dark state and the bistable liquid crystal in the functional dimming structure 10 is in the H state, only infrared light can pass through the dimming glass.

[0066] As the fourth case in this embodiment, Figure 4 As shown, when the basic dimming structure 20 is in the dark state and the bistable liquid crystal in the functional dimming structure 10 is in the FC state, the dimming glass is in the scattering dark state, which is actually also in the dark state.

[0067] As the fifth situation in this embodiment, similar to the first situation mentioned above, it is not shown in the figure. When the basic dimming structure 20 is in a dark state and the bistable liquid crystal in the functional dimming structure 10 is in a P state, the dimming glass is in a dark state at this time and can also protect against infrared light.

[0068] As a sixth case in this embodiment, when the basic dimming structure 20 is in a grayscale state and the bistable liquid crystal in the functional dimming structure 10 is in an H state or a FC state, the dimming glass is in a grayscale state at this time.

[0069] Accordingly, this embodiment provides a method for preparing the above-mentioned dimming glass, which includes: a step of forming a basic dimming structure 20 and a functional dimming structure 10 , and a step of bonding the basic dimming structure 20 and the functional dimming structure 10 together.

[0070] In some embodiments, the method for preparing the basic dimming structure 20 specifically includes the following steps:

[0071] 1. Electrodes are formed on the entire surface of the third substrate 21 and the fourth substrate 22 , that is, the third electrode 23 is formed on the third substrate 21 , and the fourth electrode 24 is formed on the fourth substrate 22 .

[0072] 2. Perform coating and rubbing processes of PI liquid on the third substrate 21 for forming the third electrode 23 and the fourth substrate 22 for forming the fourth electrode 24 to form the third orientation layer 25 and the fourth orientation layer 26; wherein the third orientation layer 25 and the fourth orientation layer 26 are anti-parallel in the rubbing direction; wherein the PI liquid used is VA type PI liquid SE-5661.

[0073] 3. Apply sealant (Seal glue) on the fourth substrate 22 forming the fourth orientation layer 26, mix the liquid crystal molecules with the dichroic dye molecules to form black dye liquid crystal, and drop it on the third substrate 21 forming the third orientation layer 25; then, place the third substrate 21 and the fourth substrate 22 opposite to each other, and cure the seal glue by ultraviolet light and heat to form a basic dimming structure 20; wherein, the seal glue is SWB101, the liquid crystal molecules are MDA-18-2030, and the box thickness of the liquid crystal box of the basic dimming structure 20 is 3.5μm.

[0074] The preparation method of the functional dimming structure 10 specifically includes the following steps:

[0075] 1. Electrodes are formed on the first substrate 11 and the second substrate 12 on the entire surface, that is, the first electrode 13 is formed on the first substrate 11 , and the second electrode 14 is formed on the second substrate 12 .

[0076] 2. The first substrate 11 forming the first electrode 13 and the second substrate 12 forming the second electrode 14 are sequentially coated with PI liquid and subjected to a rubbing process to form a first orientation layer 15 and a second orientation layer 16; wherein the third orientation layer 25 and the fourth orientation layer 26 are anti-parallel in the rubbing direction; the PI liquid used is VA type PI liquid SE-5661.

[0077] 3. Apply sealant (Seal glue) on the second substrate 1212 forming the second orientation layer 16, and drop a bistable liquid crystal that can reflect infrared light on the third substrate 21 forming the third orientation layer 25; then, place the first substrate 11 and the second substrate 12 opposite to each other, and cure the seal glue by ultraviolet light and heat curing to form a basic dimming structure 20; wherein, the seal glue is SWB101, the liquid crystal molecule is HTW137500-100-01, and the box thickness of the liquid crystal box of the functional dimming structure 101 is 6μm.

[0078] The steps of connecting the basic dimming structure 20 and the functional dimming structure 10 together include:

[0079] The third substrate 21 of the basic dimming structure 20 formed above and the second substrate 12 of the functional dimming structure 10 formed above are assembled by a bonding process to manufacture a dimming glass with infrared light protection function.

[0080] Embodiment 3:

[0081] Combination Figure 5-9 As shown, this embodiment provides a dimming glass capable of intelligent display, and the structure is substantially the same as the dimming glass structure reflecting infrared light in Embodiment 2, except that the bistable liquid crystal used in the functional dimming structure 10 of the dimming glass is a bistable liquid crystal molecule capable of reflecting visible light. In order to realize intelligent display, Fig.10 As shown, the first electrode 13 on the first substrate 11 and the second electrode 14 on the second substrate 12 in the functional dimming glass are preferably both slit electrodes, and the two are cross-arranged in space, that is, a pixel unit is defined at the intersection of the first electrode 13 and the second electrode 14.

[0082] It should be noted here that the bistable liquid crystal in this embodiment can reflect visible light, which means that it can only reflect light of a specific wavelength in the visible light, that is, when the light can be white light, the selected bistable liquid crystal can reflect one of the red light, green light, and blue light in the white light.

[0083] The basic dimming structure 20 can adopt the same structure as that in Example 2, so its structure and display state are not described one by one here. Except for the above differences, the functional dimming structure 10 has the same structure as that in Example 2 and the form that the bistable liquid crystal can present, so it is not described one by one.

[0084] Several display modes of dimming glass are given below.

[0085] The first display mode is also the double-sided display mode. Figure 5 As shown, the basic dimming structure 20 is controlled to be in the bright state, and the bistable liquid crystal of the functional dimming structure 10 is in the P state. At this time, the dimming glass presents the color of the visible light reflected by the bistable liquid crystal (single color light, such as green light), and the displayed information can be seen on both sides of the dimming glass. It should be understood that the dimming glass in this embodiment can realize the display of a single color.

[0086] The second display mode, that is, the black background display mode, is as follows: Figure 6As shown, the basic dimming structure 20 is controlled to be in a dark state, and the bistable liquid crystal of the functional dimming structure 10 is in a P state. At this time, the basic dimming structure 20 is a non-display area, and only the functional dimming structure 10 is a display area that displays the color of the visible light reflected by the bistable liquid crystal (for example, green light), and the displayed information can only be seen on the basic dimming structure 20 side.

[0087] The third display mode, namely bright display, is as follows: Figure 7 As shown, the basic dimming structure 20 is controlled to be in a bright state, and the bistable liquid crystal of the functional dimming structure 10 is in an H state. At this time, the dimming glass is in a bright state.

[0088] The fourth display mode is dark display. Figure 8 and 9 As shown, the basic dimming structure 20 is controlled to be in a dark state, and the bistable liquid crystal of the functional dimming structure 10 is in an FC state or an H state. At this time, the dimming glass is in a dark state.

[0089] In the fifth display mode, namely dark display, the basic dimming structure 20 is controlled to be in grayscale state, the bistable liquid crystal of the functional dimming structure 10 is in FC state or H state, and the dimming glass is in grayscale state.

[0090] Correspondingly, the present embodiment further provides a method for preparing the above dimming glass, which includes: a step of forming a basic dimming structure 20 and a functional dimming structure 10 , and a step of bonding the basic dimming structure 20 and the functional dimming structure 10 together.

[0091] In some embodiments, the method for preparing the basic dimming structure 20 specifically includes the following steps:

[0092] 1. Electrodes are formed on the entire surface of the third substrate 21 and the fourth substrate 22 , that is, the third electrode 23 is formed on the third substrate 21 , and the fourth electrode 24 is formed on the fourth substrate 22 .

[0093] 2. Performing PI liquid coating and rubbing processes on the third substrate 21 for forming the third electrode 23 and the fourth substrate 22 for forming the fourth electrode 24, respectively, to form a third orientation layer 25 and a fourth orientation layer 26; wherein the third orientation layer 25 and the fourth orientation layer 26 are anti-parallel in the rubbing direction; wherein the PI liquid used is VA type PI liquid SE-4804.

[0094] 3. Apply sealant (Seal glue) on the fourth substrate 22 forming the fourth orientation layer 26, mix the liquid crystal molecules with the dichroic dye molecules to form black dye liquid crystals, and drop them on the third substrate 21 forming the third orientation layer 25; then, place the third substrate 21 and the fourth substrate 22 opposite to each other, and cure the seal glue by ultraviolet light and heat curing to form a basic dimming structure 20; wherein, the seal glue is SWB73, the liquid crystal molecules are BOE-841036, and the box thickness of the liquid crystal box of the basic dimming structure 20 is 9μm.

[0095] The preparation method of the functional dimming structure 10 specifically includes the following steps:

[0096] 1. Electrodes are formed on the first substrate 11 and the second substrate 12 on the entire surface, that is, the first electrode 13 is formed on the first substrate 11 , and the second electrode 14 is formed on the second substrate 12 .

[0097] 2. The first substrate 11 forming the first electrode 13 and the second substrate 12 forming the second electrode 14 are sequentially coated with PI liquid and subjected to a rubbing process to form a first orientation layer 15 and a second orientation layer 16; wherein the third orientation layer 25 and the fourth orientation layer 26 are anti-parallel in the rubbing direction; the PI liquid used is VA type PI liquid SE-4804.

[0098] 3. Apply sealant (Seal glue) on the second substrate 1212 forming the second orientation layer 16, and drop the bistable liquid crystal that can reflect red light on the third substrate 21 forming the third orientation layer 25; then, place the first substrate 11 and the second substrate 12 opposite to each other, and cure the seal glue by ultraviolet light and heat curing to form a basic dimming structure 20; wherein the seal glue is SWB73, the liquid crystal molecule is HTW137500-100-02, and the box thickness of the liquid crystal box of the functional dimming structure 101 is 4μm.

[0099] The steps of connecting the basic dimming structure 20 and the functional dimming structure 10 together include:

[0100] The third substrate 21 of the basic dimming structure 20 formed above and the second substrate 12 of the functional dimming structure 10 formed above are assembled by a bonding process to manufacture dimming glass with display function.

[0101] In some embodiments, the method for preparing the basic dimming structure 20 specifically includes the following steps:

[0102] 1. Electrodes are formed on the entire surface of the third substrate 21 and the fourth substrate 22 , that is, the third electrode 23 is formed on the third substrate 21 , and the fourth electrode 24 is formed on the fourth substrate 22 .

[0103] 2. Performing a PI liquid coating and rubbing process on the third substrate 21 for forming the third electrode 23 and the fourth substrate 22 for forming the fourth electrode 24, respectively, to form a third orientation layer 25 and a fourth orientation layer 26; wherein the third orientation layer 25 and the fourth orientation layer 26 are anti-parallel in the rubbing direction; wherein the PI liquid used is VA type PI liquid DL-4018.

[0104] 3. Apply sealant (Seal glue) on the fourth substrate 22 forming the fourth orientation layer 26, mix the liquid crystal molecules with the dichroic dye molecules to form black dye liquid crystals, and drop them on the third substrate 21 forming the third orientation layer 25; then, place the third substrate 21 and the fourth substrate 22 opposite to each other, and cure the seal glue by ultraviolet light and heat curing to form a basic dimming structure 20; wherein, the seal glue is SWB73, the liquid crystal molecules are BOE-841036, and the box thickness of the liquid crystal box of the basic dimming structure 20 is 6μm.

[0105] The preparation method of the functional dimming structure 10 specifically includes the following steps:

[0106] 1. Electrodes are formed on the first substrate 11 and the second substrate 12 on the entire surface, that is, the first electrode 13 is formed on the first substrate 11 , and the second electrode 14 is formed on the second substrate 12 .

[0107] 2. The first substrate 11 forming the first electrode 13 and the second substrate 12 forming the second electrode 14 are sequentially coated with PI liquid and subjected to a rubbing process to form a first orientation layer 15 and a second orientation layer 16; wherein the third orientation layer 25 and the fourth orientation layer 26 are anti-parallel in the rubbing direction; the PI liquid used is VA type PI liquid SE-4804.

[0108] 3. Apply sealant (Seal glue) on the second substrate 1212 forming the second orientation layer 16, and drop the bistable liquid crystal that can reflect green light on the third substrate 21 forming the third orientation layer 25; then, place the first substrate 11 and the second substrate 12 opposite to each other, and cure the seal glue by ultraviolet light and heat curing to form a basic dimming structure 20; wherein the seal glue is SWB73, the liquid crystal molecule is HTW137500-100-03, and the box thickness of the liquid crystal box of the functional dimming structure 101 is 5μm.

[0109] The steps of connecting the basic dimming structure 20 and the functional dimming structure 10 together include:

[0110] The third substrate 21 of the basic dimming structure 20 formed above and the second substrate 12 of the functional dimming structure 10 formed above are assembled by a bonding process to manufacture dimming glass with display function.

[0111] Example 4

[0112] In this embodiment, a writable dimming glass is provided, which is substantially the same as the dimming glass in Embodiment 3, except that the functional dimming structure 10 in this embodiment at least uses a flexible substrate away from the substrate of the basic dimming glass. In other words, the first substrate 11 in the functional dimming structure 10 is a flexible substrate, or the first substrate 11 and the second substrate 12 are both substrates. In this way, when the user writes on the first substrate 11 with a stylus, the pressure applied by the stylus or the voltage provided by the stylus causes the bistable liquid crystal to be converted from the FC state to the P state, thereby realizing the writable function of the dimming glass.

[0113] The rest of the structure and preparation method of the smart glass in this embodiment are the same as those of the smart glass in Embodiment 3, and thus will not be described in detail here.

[0114] Example 5

[0115] like Fig.11 As shown, a dimming glass is provided in this embodiment, and the structure of the dimming glass is roughly similar to that of the dimming glass in embodiments 2 and 3. The functional dimming structure 10 and the basic dimming structure 20 of the dimming glass both adopt a liquid crystal box structure. That is, the functional dimming structure 10 includes: a first substrate 11 and a second substrate 12 arranged oppositely, a first electrode 13 arranged on the side of the first substrate 11 close to the second substrate 12, a second electrode 14 arranged on the side of the second substrate 12 close to the first substrate 11, and a first liquid crystal layer 17 arranged between the first electrode 13 and the second electrode 14; the basic dimming structure 20 includes a third substrate 21 and a fourth substrate 22 arranged oppositely, a third electrode 23 arranged on the side of the third substrate 21 close to the fourth substrate 22, a fourth electrode 24 arranged on the side of the fourth substrate 22 close to the third substrate 21, and a second liquid crystal layer 27 arranged between the third electrode 23 and the fourth electrode 24. The difference is that, in this embodiment, the second substrate 12 in the functional dimming structure and the third substrate 21 in the basic dimming structure are shared. That is to say, the dimming glass in this embodiment can use three glass substrates, and no bonding layer 30 is required. This type of structured dimming glass has a simple structure and can effectively reduce the thickness of the dimming glass.

[0116] It should be noted that other structures of the switchable glass of this embodiment can adopt the same structures as those in Embodiments 1-3 and thus will not be described in detail here.

[0117] Example 6

[0118] The present embodiment provides a dimming glass, which includes a basic dimming structure 20 and a functional dimming structure 10 which are stacked, wherein the functional dimming structure 10 can adopt any one of the embodiments 1 to 4. The basic dimming structure 20 adopts an electrochromic structure.

[0119] Specifically, the basic dimming glass includes a third substrate, a fourth substrate, and an electrochromic layer sandwiched between the third substrate and the fourth substrate; wherein the electrochromic layer controls whether light can pass through under the control of the electric field generated between the third substrate and the fourth substrate.

[0120] The dimming glass provided in this embodiment can achieve the same effect as the dimming glass in the above embodiments 1-4, and will not be described in detail here.

[0121] Similar to Example 5, the functional dimming structure in this embodiment includes: a first substrate and a second substrate arranged relatively to each other, a first electrode arranged on the side of the first substrate close to the second substrate, a second electrode arranged on the side of the second substrate close to the first substrate, and a first liquid crystal layer arranged between the first electrode and the second electrode; a basic dimming structure includes a third substrate and a fourth substrate arranged relatively to each other, a third electrode arranged on the side of the third substrate close to the fourth substrate, a fourth electrode arranged on the side of the fourth substrate close to the third substrate, and an electrochromic layer arranged between the third electrode and the fourth electrode; wherein the second substrate and the third substrate are shared. That is to say, the dimming glass in this embodiment can use three glass substrates, and no bonding layer is required. This type of structured dimming glass has a simple structure and can effectively reduce the thickness of the dimming glass.

[0122] It should be noted here that the above-mentioned embodiments 1-6 are all described by taking the first electrode and the second electrode in the functional dimming structure as plate electrodes, and the third electrode and the fourth electrode in the basic dimming structure as plate electrodes as examples. However, in actual applications, of course, when the liquid crystal molecules are positive liquid crystal molecules, the first electrode and the second electrode can form a TN type electric field after a voltage is applied; the first electrode and the second electrode can also be both arranged on the first substrate. In this case, the first electrode and the second electrode are arranged in sequence along a direction away from the first substrate. The first electrode can be a plate electrode, and the second electrode is a slit electrode. When a voltage is applied to the first electrode and the second electrode, an FFS type electric field (or ADS type) can be formed; or the first electrode and the second electrode are slit electrodes, which are alternately arranged on the first substrate. When a voltage is applied to the first electrode and the second electrode, an IPS type electric field can be formed.

[0123] Correspondingly, the third electrode and the fourth electrode in the basic dimming structure may also adopt the same electric field mode as the first electrode and the second electrode in the functional dimming structure, which will not be listed one by one here.

[0124] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but 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 considered to be within the scope of protection of the present invention.

Claims

1. A dimming glass, characterized in that: include: The basic dimming structure and the functional dimming structure are stacked; wherein, The basic dimming structure is used to adjust the transmittance of the light shining thereon; The functional dimming structure is used to reflect light of a specific wavelength band irradiated thereon; The functional dimming structure comprises: a first substrate and a second substrate arranged opposite to each other, and a first liquid crystal layer sandwiched between the first substrate and the second substrate; wherein, The first liquid crystal layer is used to reflect light of a specific wavelength band under the action of the electric field generated between the first substrate and the second substrate; The first liquid crystal layer includes a bistable liquid crystal layer; The first substrate comprises a first base, and a first electrode disposed on a side of the first base close to the first liquid crystal layer; The second substrate comprises: a second base, and a second electrode disposed on a side of the second base close to the bistable liquid crystal layer; wherein, The first electrode and the second electrode are both slit electrodes and are cross-arranged; The first substrate further includes a first alignment layer disposed on a side of the first electrode close to the first liquid crystal layer.

2. The dimming glass according to claim 1, characterized in that: At least one of the first substrate and the second substrate close to the basic dimming structure is a flexible substrate.

3. The switchable glass according to claim 1, characterized in that: The basic dimming structure includes: a third substrate, a fourth substrate, and a second liquid crystal layer sandwiched between the third substrate and the fourth substrate; wherein, The second liquid crystal layer includes basic liquid crystal molecules and dichroic dye molecules, and is used to be flipped under the control of the electric field generated between the third substrate and the fourth substrate to control the transmittance of light.

4. The switchable glass according to claim 3, characterized in that: The second liquid crystal layer has a chiral additive therein.

5. The dimming glass according to claim 3 or 4, characterized in that: The third substrate comprises a third base and a third electrode disposed on a side of the third base close to the liquid crystal layer; The fourth substrate comprises: a fourth base, and a fourth electrode disposed on a side of the fourth base close to the second liquid crystal layer; wherein, The third electrode and the fourth electrode are both plate-shaped electrodes.

6. The switchable glass according to claim 1, characterized in that: The basic dimming structure includes: a third substrate, a fourth substrate, and an electrochromic layer sandwiched between the third substrate and the fourth substrate; wherein, The electrochromic layer controls whether light can pass through under the control of the electric field generated between the third substrate and the fourth substrate.

7. The switchable glass according to claim 1, characterized in that: The functional dimming structure comprises: a first substrate and a second substrate arranged opposite to each other, a first electrode arranged on a side of the first substrate close to the second substrate, a second electrode arranged on a side of the second substrate close to the first substrate, and a first liquid crystal layer arranged between the first electrode and the second electrode; The basic dimming structure comprises a third substrate and a fourth substrate arranged opposite to each other, a third electrode arranged on a side of the third substrate close to the fourth substrate, a fourth electrode arranged on a side of the fourth substrate close to the third substrate, and a second liquid crystal layer arranged between the third electrode and the fourth electrode; wherein, The second substrate is common to the third substrate.

8. The switchable glass according to claim 1, characterized in that: The functional dimming structure comprises: a first substrate and a second substrate arranged opposite to each other, a first electrode arranged on a side of the first substrate close to the second substrate, a second electrode arranged on a side of the second substrate close to the first substrate, and a first liquid crystal layer arranged between the first electrode and the second electrode; The basic dimming structure comprises a third substrate and a fourth substrate arranged opposite to each other, a third electrode arranged on a side of the third substrate close to the fourth substrate, a fourth electrode arranged on a side of the fourth substrate close to the third substrate, and an electrochromic layer arranged between the third electrode and the fourth electrode; wherein, The second substrate is common to the third substrate.

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