Dark-state low-light-transmittance dimming glass
By using a double-layer dimming film structure and laminated dimming glass, the problem of high light transmittance in the dark state is solved, achieving low light transmittance in the dark state and high light transmittance in the bright state, thus expanding the application range and reducing costs.
Patent Information
- Application Number
- CN202520387291.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Existing smart glass has high dark-state transmittance, which limits its application areas. Furthermore, using dark glass and dark film to reduce bright-state transmittance is costly.
A dual-layer dimming film structure is adopted, which combines a transparent substrate, an interlayer, and an adhesive layer. By controlling the state changes of the dimming film, low dark state transmittance and high bright state transmittance are achieved. The interlayer processing temperature and pressure are carried out within a specific range, and a transparent conductive layer and a light control layer are used to regulate light transmission.
It achieves a dark transmittance of ≤0.5% and a bright transmittance of ≥15%, improves the dimming ratio, expands the application range, and reduces costs.
Smart Images
Figure CN223728094U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to light modulation technical field especially is related to a dark state low light transmittance light modulation glass. BACKGROUND
[0002] Light modulation glass is a light control device, mainly setting light modulation film in two layers of transparent glass, light modulation film types have suspended particle (SPD) light modulation film, polymer dispersed liquid crystal (PDLC) light modulation film, electrochromic (EC) light modulation film, thermochromic light modulation film or photochromic light modulation film. For suspended particle light modulation film, polymer dispersed liquid crystal light modulation film, electrochromic light modulation film, when connecting electricity, the arrangement or state of material in light modulation film changes, thereby the light transmittance of light modulation glass changes, such as converting from low light transmittance to high light transmittance, or converting from high light transmittance to low light transmittance. This kind of light modulation glass can realize the quick conversion between open state and off state through the action of electric field / current, has the advantages of active light transmittance control and energy saving, and the equipment can be used as intelligent window of spacecraft, high-speed train, automobile, building and rearview mirror, sunglasses, display and the like.
[0003] Although light modulation glass has been developed successfully for many years, the dark state light transmittance of such light modulation glass made of colorless glass and colorless adhesive film is generally more than 0.5%, mainly because the dark state light transmittance of light modulation film used for making such light modulation glass is relatively high, thereby leading to poor shielding light transmittance of light modulation glass, and thereby limiting the application field of the light modulation glass. At present, the light modulation glass with low dark state light transmittance is generally prepared by using dark glass and / or dark adhesive film, but this brings the problem that the bright state light transmittance will also be significantly reduced, and the light modulation ratio is reduced. In addition, the dark glass and / or dark adhesive film is relatively expensive, and the problem has not been effectively solved.
[0004] It can be seen that the dark state light transmittance of the light modulation glass in the prior art is relatively high. Therefore, it is necessary to invent a light modulation glass with lower dark state light transmittance. UTILITY MODEL CONTENTS
[0005] In view of the above problems, the utility model aims to provide a dark state low light transmittance light modulation glass to change the problem of high dark state light transmittance of light modulation glass.
[0006] The technical scheme of the utility model is a dark state low light transmittance light modulation glass, which comprises a light modulation glass, the light modulation glass comprises a first transparent substrate, a second transparent substrate, a first light modulation film and a second light modulation film arranged between the first transparent substrate and the second transparent substrate, a first adhesive layer arranged between the first transparent substrate and the first light modulation film, a second adhesive layer arranged between the second transparent substrate and the second light modulation film, and a bonding layer arranged between the first light modulation film and the second light modulation film, and the dark state light transmittance of the light modulation glass is less than or equal to 0.5%.
[0007] Preferably, the dark state light transmittance of the dimming glass is ≤ 0.3%.
[0008] Preferably, the bright state light transmittance of the dimming glass is ≥ 15%.
[0009] Preferably, the bright state light transmittance of the dimming glass is ≥ 20%.
[0010] Preferably, the first dimming film and the second dimming film are each independently selected from a suspended particle dimming film, a polymer dispersed liquid crystal dimming film or an electrochromic dimming film.
[0011] Preferably, the dark state light transmittance of the first dimming film and the second dimming film is ≤ 2%.
[0012] Preferably, the dark state light transmittance of the first dimming film and the second dimming film is ≤ 1.5%.
[0013] Preferably, the first transparent substrate and the second transparent substrate are each independently selected from a transparent glass sheet or a transparent plastic sheet.
[0014] Preferably, the first interlayer adhesive layer and the second interlayer adhesive layer are each independently selected from an EVA adhesive film, a TPU adhesive film or a PVB adhesive film.
[0015] Preferably, the bonding layer is selected from an EVA adhesive film, a TPU adhesive film, a PVB adhesive film or a transparent optical adhesive.
[0016] Preferably, the first dimming film and the second dimming film each comprise a first transparent substrate, a first transparent conductive layer formed on the first transparent substrate, a second transparent substrate, a second transparent conductive layer formed on the second transparent substrate, the first transparent conductive layer and the second transparent conductive layer are oppositely arranged, and a light control layer arranged between the first transparent conductive layer and the second transparent conductive layer.
[0017] Preferably, the first transparent substrate and the second transparent substrate are transparent plastic sheets.
[0018] Preferably, the first transparent conductive layer and the second transparent conductive layer are each independently selected from an ITO conductive layer, a FZO conductive layer, an IZO conductive layer, a GZO conductive layer, an AZO conductive layer, a PEDOT conductive layer, a nano-Ag wire conductive layer, conductive graphene and a nano-Cu wire conductive layer.
[0019] Preferably, the light control layer is selected from a suspended particle light control layer, a polymer dispersed liquid crystal light control layer or an electrochromic light control layer.
[0020] Preferably, the refractive index of the bonding layer matches the refractive index of the first transparent substrate and the second transparent substrate.
[0021] Preferably, the refractive index of the bonding layer differs from the refractive index of the first transparent substrate, the second transparent substrate by no more than 0.01.
[0022] Preferably, the bonding layer is a thermally cured glue.
[0023] The utility model discloses a dark state light transmittance of light adjusting glass is less than or equal to 0.5%, change the problem of high light transmittance of light adjusting glass in the past, and simultaneously have higher bright state light transmittance. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of light adjusting glass of the utility model;
[0025] Figure 2 It is a structural schematic diagram of light adjusting film in the utility model;
[0026] Wherein: 1 - first transparent substrate; 2 - second transparent substrate; 3 - first light adjusting film; 4 - second light adjusting film; 5 - first interlayer; 6 - second interlayer; 7 - bonding layer; a - first transparent base; b - first transparent conductive layer; c - second transparent base; d - second transparent conductive layer; e - light control layer. DETAILED DESCRIPTION
[0027] The utility model will be further explained in detail in combination with the drawings.
[0028] In the utility model, the following terms used have the meanings as defined below.
[0029] The dark state of light adjusting glass is the state that the light transmittance of light adjusting glass is minimum.
[0030] The bright state of light adjusting glass is the state that the light transmittance of light adjusting glass is maximum.
[0031] The transition state of light adjusting glass is the state that the light transmittance of light adjusting glass is between the dark state and the bright state.
[0032] Transparent conductive film, transparent base and the lamination of transparent conductive layer.
[0033] Light adjusting magnification, the ratio of the bright state light transmittance of light adjusting glass and the dark state light transmittance of light adjusting glass.
[0034] As Figure 1As shown, this utility model provides a dimming glass with low light transmittance in the dark state, including a dimming glass comprising a first transparent substrate 1, a second transparent substrate 2, a first dimming film 3 and a second dimming film 4 disposed between the first transparent substrate 1 and the second transparent substrate 2; a first interlayer 5 is disposed between the first transparent substrate 1 and the first dimming film 3, a second interlayer 6 is disposed between the second transparent substrate 2 and the second dimming film 4, and an adhesive layer 7 is disposed between the first dimming film 3 and the second dimming film 4; the dark state transmittance of the dimming glass is ≤0.5%.
[0035] Specifically, the dark transmittance of the dimming glass is ≤0.3%.
[0036] Specifically, the light transmittance of the dimming glass in its bright state is ≥15%.
[0037] Specifically, the light transmittance of the dimming glass in its bright state is ≥20%.
[0038] In addition, the first dimming film 3 and the second dimming film 4 are each independently selected from suspended particle dimming film, polymer dispersed liquid crystal dimming film or electrochromic dimming film.
[0039] Specifically, the dark-state transmittance of the first dimming film 3 and the second dimming film 4 is ≤2%.
[0040] Specifically, the dark-state transmittance of the first dimming film 3 and the second dimming film 4 is ≤1.5%.
[0041] Specifically, the first transparent substrate 1 and the second transparent substrate 2 are each independently selected from a transparent glass plate or a transparent plastic plate.
[0042] Specifically, the first adhesive layer 5 and the second adhesive layer 6 are each independently selected from EVA film, TPU film or PVB film.
[0043] Specifically, the adhesive layer 7 is selected from EVA film, TPU film, PVB film or transparent optical adhesive.
[0044] like Figure 2 As shown, the first dimming film 3 and the second dimming film 4 each include a first transparent substrate a, a first transparent conductive layer b formed on the first transparent substrate a, a second transparent substrate c, a second transparent conductive layer d formed on the second transparent substrate c, the first transparent conductive layer b and the second transparent conductive layer d being disposed opposite to each other, and a light control layer e disposed between the first transparent conductive layer b and the second transparent conductive layer d.
[0045] Specifically, the first transparent substrate a and the second transparent substrate c are transparent plastic sheets.
[0046] Specifically, the first transparent conductive layer b and the second transparent conductive layer d are each independently selected from an ITO conductive layer, an FZO conductive layer, an IZO conductive layer, a GZO conductive layer, an AZO conductive layer, a PEDOT conductive layer, a nano Ag wire conductive layer, conductive graphene, and a nano Cu wire conductive layer.
[0047] Specifically, the light control layer e is selected from a suspended particle light control layer, a polymer dispersed liquid crystal light control layer, or an electrochromic light control layer.
[0048] Specifically, the refractive index of the bonding layer 7 matches the refractive index of the first transparent substrate a and the second transparent substrate c.
[0049] Specifically, the refractive index of the bonding layer 7 differs from the refractive index of the first transparent substrate a and the second transparent substrate c by no more than 0.01.
[0050] Specifically, the bonding layer 7 is a thermosetting glue.
[0051] In addition, the preparation method of the dark-state low-transmittance dimming glass in the utility model comprises the following steps:
[0052] After sequentially stacking the layers of the dark-state low-transmittance dimming glass, the dimming glass is obtained through the lamination treatment. The temperature of the lamination treatment is 90-130 DEG C, and the pressure is 0.1-1.5 MPa.
[0053] In the utility model, the types of the first transparent substrate 1 and the second transparent substrate 2 are not specially limited, and the transparent glass for conventional dimming glass known to those skilled in the art can be used, which can be ordinary glass such as inorganic glass, organic glass, or functional glass such as UV blocking glass, IR blocking glass, Low-E glass, tempered glass or antibacterial glass.
[0054] In the utility model, the types of the first lamination layer 5 and the second lamination layer 6 are not specially limited, and the lamination layer for conventional dimming glass known to those skilled in the art can be used, which can be EVA adhesive film, TPU adhesive film, PVB adhesive film, or functional adhesive film such as UV blocking EVA adhesive film, UV blocking TPU adhesive film, and UV blocking PVB adhesive film.
[0055] In the utility model, the bonding layer 7 is a lamination layer for conventional dimming glass known to those skilled in the art, which can be EVA adhesive film, TPU adhesive film, PVB adhesive film, or functional adhesive film such as UV blocking EVA adhesive film, UV blocking TPU adhesive film, and UV blocking PVB adhesive film.
[0056] In the utility model, the bonding layer 7 is a transparent optical adhesive, and the refractive index of the bonding layer 7 matches the refractive index of the first transparent substrate a and the second transparent substrate c.
[0057] Specifically, the refractive index of the adhesive layer 7 differs from the refractive index of the first transparent substrate a and the second transparent substrate c by no more than 0.01.
[0058] Specifically, the adhesive layer 7 is a thermosetting glue.
[0059] In the utility model, the manufacturing mode of the light-adjustable glass is not specially limited, and the conventional lamination mode of the light-adjustable glass in the field can be used, such as lamination in a laminator or lamination in a high-pressure kettle or lamination box / furnace.
[0060] The light-adjustable glass can realize the change effect of the light transmittance of the light-adjustable glass having multiple states by respectively controlling the first light-adjustable film 3 and the second light-adjustable film 4 to be in the dark state or the bright state or the transition state.
[0061] Finally, the light-adjustable glass prepared by the utility model can be applied to automobile window glass, sky screen glass or glass curtain wall.
[0062]
Example 1
[0063] Two ultra-white glasses, three EVA lamination layers, two dark-state light-adjustable films with a light transmittance of 1.5% suspended particles, are sequentially stacked according to the structure, and lamination is carried out in a high-pressure kettle, the lamination temperature is 110 DEG C, the relative pressure of lamination is 0.6 MPa, and the lamination time is 120 minutes, so that the light-adjustable glass 1 is obtained, and the test results are shown in Table 1. Figure 1
[0064]
Example 2
[0065] Two ultra-white glasses, two PVB lamination layers, two dark-state light-adjustable films with a light transmittance of 2.0% polymer dispersed liquid crystal, and single-component transparent epoxy resin silicone are sequentially stacked according to the structure, and lamination is carried out in a high-pressure kettle, the lamination temperature is 120 DEG C, the relative pressure of lamination is 0.9 MPa, and the lamination time is 60 minutes, so that the light-adjustable glass 2 is obtained, and the test results are shown in Table 1. Figure 1
[0066]
Comparative Example 1
[0067] The same as
Example 1
[0068]
Comparative Example 2
[0069] The same as
Comparative Example 1
[0070] Table 1
[0071]
[0072] The voltage in Table 1 refers to the effective value of 60Hz alternating current, the voltage applied by the two-layer light-adjusting film in Example 1 and Example 2 is equal, and the voltage in Comparative Example 1 and Comparative Example 2 is the same as that in Example 1
[0073] In Table 1, in Example 1, when the voltage is 0V, it is the dark state; when the voltage is 110V, it is the bright state; and when the voltage is between 0V and 110V, it is the transition state; in Example 2, when the voltage is 0V, it is the dark state; when the voltage is 60V, it is the bright state; and when the voltage is between 0V and 60V, it is the transition state.
[0074] As can be seen from the data in Table 1, the light-adjusting glass made by the scheme of the present application has a lower dark-state light transmittance, a higher light-adjusting magnification, and a wider light-adjusting range.
[0075] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change or modification made according to the technical principle of the present application to the above embodiment still falls within the scope of the technical scheme of the present application.
Claims
1. A dark state low light transmittance switchable glass, characterized in that, The light-adjustable glass comprises a first transparent substrate (1), a second transparent substrate (2), a first light-adjustable film (3) and a second light-adjustable film (4) arranged between the first transparent substrate (1) and the second transparent substrate (2); a first adhesive layer (5) is arranged between the first transparent substrate (1) and the first light-adjustable film (3), a second adhesive layer (6) is arranged between the second transparent substrate (2) and the second light-adjustable film (4), and an adhesive layer (7) is arranged between the first light-adjustable film (3) and the second light-adjustable film (4); the dark-state light transmittance of the light-adjustable glass is less than or equal to 0.5%.
2. The dark-state, low-visibility switchable glass of claim 1, wherein: The dark-state light transmittance of the light-adjustable glass is less than or equal to 0.3%.
3. The dark-state, low-visibility switchable glass of claim 1, wherein: The bright-state light transmittance of the light-adjustable glass is greater than or equal to 15%.
4. The dark-state, low-visibility switchable glass of claim 1, wherein: The bright-state light transmittance of the light-adjustable glass is greater than or equal to 20%.
5. The dark-state, low-visibility switchable glass of claim 1, wherein: The first light-adjustable film (3) and the second light-adjustable film (4) are independently selected from a suspended particle light-adjustable film, a polymer dispersed liquid crystal light-adjustable film or an electrochromic light-adjustable film.
6. The dark-state, low-visibility switchable glass of claim 1, wherein: The dark-state light transmittance of the first light-adjustable film (3) and the second light-adjustable film (4) is less than or equal to 2%.
7. The dark-state, low-visibility switchable glass of claim 1, wherein: The first transparent substrate (1) and the second transparent substrate (2) are independently selected from a transparent glass plate or a transparent plastic plate.
8. The dark-state, low-visibility switchable glass of claim 1, wherein: The first adhesive layer (5) and the second adhesive layer (6) are independently selected from an EVA adhesive film, a TPU adhesive film or a PVB adhesive film.
9. The dark-state, low-visibility switchable glass of claim 1, wherein: The adhesive layer (7) is selected from an EVA adhesive film, a TPU adhesive film, a PVB adhesive film or a transparent optical adhesive.
10. The dark-state, low-visibility switchable glass of claim 5, wherein: The first light-adjustable film (3) and the second light-adjustable film (4) each comprise a first transparent substrate (a), a first transparent conductive layer (b) formed on the first transparent substrate (a), a second transparent substrate (c), a second transparent conductive layer (d) formed on the second transparent substrate (c), the first transparent conductive layer (b) and the second transparent conductive layer (d) are oppositely arranged, and a light control layer (e) is arranged between the first transparent conductive layer (b) and the second transparent conductive layer (d).
11. The dark-state, low- visible light transmittance switchable glass according to claim 10, wherein: The first transparent substrate (a) and the second transparent substrate (c) are transparent plastic sheets.
12. The dark-state, low- visible light transmittance switchable glass of claim 10, wherein: The first transparent conductive layer (b) and the second transparent conductive layer (d) are independently selected from an ITO conductive layer, an FZO conductive layer, an IZO conductive layer, a GZO conductive layer, an AZO conductive layer, a PEDOT conductive layer, a nano-Ag wire conductive layer, conductive graphene and a nano-Cu wire conductive layer.
13. The dark-state, low- visible light transmittance switchable glass of claim 10, wherein: The light control layer (e) is selected from a suspended particle light control layer, a polymer dispersed liquid crystal light control layer or an electrochromic light control layer.
14. The dark-state, low-visibility switchable glass of claim 10, wherein: The refractive index of the adhesive layer (7) matches the refractive index of the first transparent substrate (a) and the second transparent substrate (c).
15. The dark-state, low- visible light transmittance switchable glass of claim 14, wherein: The refractive index of the adhesive layer (7) differs from the refractive index of the first transparent substrate (a) and the second transparent substrate (c) by no more than 0.
01.
16. The dark-state, low-visibility switchable glass of claim 1, wherein: The adhesive layer (7) is a thermosetting adhesive.