Light control conductive film

Abstract

The utility model discloses a kind of light-adjusting conductive films, it is characterized in that, including substrate layer, the substrate layer includes substrate main body and is located at the first primer layer and second primer layer of substrate main body opposite two faces, the light-adjusting conductive film further includes hardening layer, shadow-eliminating layer and ITO conductive layer sequentially stacked and set on the first primer layer, the refractive index of the first primer layer and second primer layer is 1.48~1.53, the thickness of the shadow-eliminating layer is 65~75nm, the refractive index of the shadow-eliminating layer is 1.68~1.75, the b ＊ Value of the light-adjusting conductive film is 0~3. The light-adjusting conductive film of the utility model can obtain the conductive film of the b ＊ Value range required by user, cooperate other components in whole light-adjusting glass, so that the chroma of whole light-adjusting glass is neutral.

Description

Technical Field

[0001] This utility model belongs to the field of protective film technology, and specifically relates to a dimming conductive film. Background Technology

[0002] As people's demands for quality of life gradually increase, their requirements for vehicle comfort and aesthetics are also constantly rising. Smart glass is gradually becoming an important feature in the automotive industry. By adding a film structure to the car glass and controlling the light transmittance of the glass through voltage, the light inside the car can be adjusted according to needs.

[0003] Existing automotive dimming glass solutions primarily utilize EC, PDLC, and SPD technologies. However, regardless of the specific solution used, a flexible conductive film is required as an electrode for operation. Current solutions primarily use PET substrates, employing a HC coating on both sides of the substrate followed by a conductive layer sputtered onto it to serve as the electrode. For example, the EC solution requires two conductive films stacked together, resulting in an overall chromaticity (b) of the dimming glass. ＊ The value shifts by several times, causing the entire dimming glass to turn yellow or blue, affecting the user experience.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a dimming conductive film that can achieve the dimming effect required by the user. ＊ A conductive film with a range of values, in conjunction with other components in the overall dimming glass, makes the overall color of the dimming glass more neutral.

[0006] To achieve the above objectives, a specific embodiment of this utility model provides the following technical solution: a dimming conductive film, comprising a substrate layer, the substrate layer comprising a substrate body and a first base coating and a second base coating disposed on opposite sides of the substrate body, the dimming conductive film further comprising a hardening layer, an anti-reflection layer and an ITO conductive layer sequentially stacked on the first base coating, the refractive index of the first base coating and the second base coating being 1.48~1.53, the thickness of the anti-reflection layer being 65~75nm, the refractive index of the anti-reflection layer being 1.68~1.75, and the b... ＊ The value is between 0 and 3.

[0007] In one or more embodiments of this utility model, the thickness of the ITO conductive layer is 150~300nm.

[0008] In one or more embodiments of this utility model, the thickness of the hardened layer is 500~600nm.

[0009] In one or more embodiments of this utility model, the refractive index of the hardened layer is 1.58~1.63nm.

[0010] In one or more embodiments of this utility model, the thickness of the substrate layer is 188~250nm.

[0011] In one or more embodiments of this utility model, the thickness of the substrate layer is 188 nm.

[0012] In one or more embodiments of this utility model, the substrate body is a PET substrate.

[0013] In one or more embodiments of the present invention, an anti-adhesion layer is further provided on the side of the substrate layer opposite to the hardened layer.

[0014] In one or more embodiments of this utility model, the thickness of the anti-adhesion layer is 120~130nm.

[0015] In one or more embodiments of this utility model, the refractive index of the anti-adhesion layer is 1.53~1.56nm.

[0016] Compared with the prior art, the dimming conductive film of this invention, through the design of the entire film layer, especially the adjustment of the thickness and refractive index of the anti-reflection layer, thereby improving the overall performance of the dimming conductive film of this invention. ＊ A value between 0 and 3 can be used in conjunction with other components in the overall dimming glass assembly to make the overall color of the dimming glass more neutral. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a photoconductive film in one example of this utility model;

[0019] Figure 2 This is a schematic diagram of a photoconductive film in another example of this utility model.

[0020] Explanation of key figure labels:

[0021] 1. Substrate layer; 11. Substrate body; 12. First primer layer; 13. Second primer layer; 2. Hardening layer; 3. Anti-reflection layer; 4. ITO conductive layer; 5. Anti-adhesion layer. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0023] Smart glass primarily utilizes EC, PDLC, and SPD technologies. Regardless of the specific solution used, a flexible conductive film is required as an electrode for operation. For example, the EC solution requires two layers of conductive film stacked together to serve as two electrodes. Furthermore, components other than the conductive film in the EC solution also affect the overall performance of the smart glass. ＊ The value indicates that the EC solution requires processing of the conductive film and other components during fabrication, and this processing also affects the overall brightness of the switching glass. ＊ To achieve a neutral light polarization in the dimming glass, a specific b value is needed. ＊ A conductive film with a value range is used to facilitate the optical polarization neutrality of the resulting dimming glass.

[0024] like Figure 1 As shown, in one example of this utility model, the dimming conductive film includes a substrate layer 1. The substrate layer 1 includes a first base coating layer 12 and a second base coating layer 13 on opposite sides of the substrate body 11. The dimming conductive film also includes a hardening layer 2, an anti-reflection layer 3, and an ITO conductive layer 4 sequentially stacked on the first base coating layer 12. The refractive index of the base coating layer is 1.48~1.53, the thickness of the anti-reflection layer 3 is 65~75nm, and the refractive index of the anti-reflection layer 3 is 1.68~1.75. The dimming conductive film has a b... ＊ The value is between 0 and 3.

[0025] In addition to serving as an electrode in dimming glass, the dimming conductive film of this invention can also solve the aforementioned technical problems. Specifically, by designing the entire film layer, especially adjusting the thickness and refractive index of the anti-reflection layer 3, the overall dimming conductive film of this invention achieves [the desired effect]. ＊ A value between 0 and 3 can be used in conjunction with other components and manufacturing processes in the subsequent dimming glass assembly to make the overall color of the prepared dimming glass more neutral.

[0026] It should be noted that b ＊ The value can also be called chromaticity b. ＊ Value is a color measurement system (L) ＊ a ＊ b in the b color space＊ L ＊ a ＊ The b color space is a color space designed to simulate human visual perception. It consists of three dimensions: L (brightness) represents the lightness from black to white, with a value range of 0 (pure black) to 100 (pure white). Simply put, it represents the brightness and darkness of an image. a ＊ (Red-Green axis) represents the position of the color between red and green. Value + a ＊ value (a) ＊ A value greater than 0 indicates the red direction; the larger the value, the redder the color. -a ＊ value (a) ＊ A value less than 0 indicates the green direction; the smaller the value (the more negative), the greener it is. ＊ = 0 indicates neutral (neither red nor green). b ＊ (Yellow-Blue Axis) represents the position of the color between yellow and blue, value: +b ＊ value (b) ＊ A value greater than 0 indicates a yellow direction. The larger the value, the yellower the color. -b ＊ value (b) ＊ A value less than 0 indicates the blue direction; the smaller the value (the more negative), the bluer it is. ＊ =0 indicates neutral (no yellow or blue).

[0027] The dimming conductive film of this invention is mainly aimed at b ＊ The value requirement, namely the overall b of the dimming conductive film ＊ A value between 0 and 3 is sufficient to meet the requirements for subsequent preparation of smart glass.

[0028] The applicant discovered that, in designing the structure of the dimming conductive film, it is necessary not only to make it b ＊ The values ​​must meet the requirements, while also considering the performance of the conductive film itself, such as transmittance, and must be based on specified materials, such as a specific substrate layer 1 and a specific conductive layer material. Therefore, after extensive experimentation, the applicant accidentally discovered that obtaining such... Figure 1 The dimming conductive film shown, combined with the selection of the thickness and refractive index of the anti-reflection layer 3, can meet the above requirements.

[0029] The first base coating 12 and the second base coating 13 in the substrate layer 1 both have a refractive index of 1.48~1.53, which can be considered as low refractive index base coatings, mainly to improve the overall transmittance.

[0030] The anti-reflection layer 3 can be prepared using commercially available resin-based anti-reflection coating solutions, such as Lien and NOa168H for a refractive index of 1.68, and Cargille 19153 for a refractive index of 1.75.

[0031] Specifically, the thickness of the ITO (indium tin oxide) conductive layer is 150~300nm. The ITO conductive layer 4 is the ITO conductive layer 4 commonly prepared by sputtering process in the prior art.

[0032] Specifically, the thickness of the hardening layer 2 is 500~600nm, and its refractive index is 1.58~1.63nm. Since the refractive index of the undercoat layer is 1.48~1.53nm and the refractive index of the anti-reflection layer 3 is 1.68~1.75nm, the hardening layer 2 not only enhances the overall hardness of the film but also provides optical matching, thus preventing excessive refractive index differences between the undercoat layer and the anti-reflection layer 3, which could lead to reduced transmittance and interference patterns in the overall film.

[0033] The hardening layer 2 can be made from a commercially available resin-based hardening coating liquid, such as KER-2500 from Shin-Etsu Chemical Co., Ltd. in Japan.

[0034] The substrate body 11 is a PET substrate, and the substrate layer 1 can be selected from Toray Industries, Japan QTQ6 / QTQ7 / U48K /

[0035] QTS1 has a base coating with a refractive index of 1.48~1.53, meaning the substrate body 11 is a PET substrate, and the thickness of the substrate layer 1 is 188~250nm. Preferably, the thickness of the substrate layer 1 is 188nm.

[0036] like Figure 2 As shown in another specific example, an anti-adhesion layer 5 is also provided on the side of the substrate layer 1 facing away from the hardened layer 2. The anti-adhesion layer 5 mainly serves to facilitate winding and can be made from commercially available anti-fouling coating liquids, such as Huigu's HG9530S. Different coating liquids can be selected according to different needs.

[0037] The anti-adhesion layer 5 has a thickness of 120-130 nm and a refractive index of 1.53-1.56 nm. The anti-adhesion layer 5 primarily functions to prevent adhesion. Normally, the thickness of the anti-adhesion layer 5 is generally above 200 nm, while the thickness of the anti-adhesion layer 5 in this invention is 120-130 nm, which can reduce or eliminate rainbow patterns, thereby improving the user's visual experience. Furthermore, the anti-adhesion layer 5 contributes to the overall brightness and conductivity of the dimming conductive film. ＊ The value has no impact or a very small impact, which can be almost ignored.

[0038] The dimming conductive film of this utility model will be described in detail below with reference to specific embodiments and comparative examples.

[0039] Example 1

[0040] A dimming conductive film as shown in Figure 2 was obtained. The thickness of the substrate layer was 188 μm, and the main substrate was a PET substrate. The refractive index of both the first and second base coating layers was 1.53. The anti-adhesion layer was formed by wet coating of HG9530S from Huigu, with a refractive index of 1.53 and a thickness of 120 nm. The curing layer was formed by wet coating of KER-2500 from Shin-Etsu Chemical Co., Ltd. of Japan, with a refractive index of 1.58 and a thickness of 580 nm. The anti-reflection layer was formed by coating of Lien and NOa168H, with a refractive index of 1.68 and a thickness of 65 nm. The ITO conductive layer was prepared by magnetron sputtering and had a thickness of 230 nm.

[0041] Example 2

[0042] A dimming conductive film as shown in Figure 2 was obtained. The thickness of the substrate layer was 188 μm, and the main substrate was a PET substrate. The refractive index of both the first and second base coating layers was 1.53. The anti-adhesion layer was formed by wet coating of HG9530S from Huigu, with a refractive index of 1.53 and a thickness of 120 nm. The curing layer was formed by wet coating of KER-2500 from Shin-Etsu Chemical Co., Ltd. of Japan, with a refractive index of 1.58 and a thickness of 580 nm. The anti-reflection layer was formed by coating of Lien and NOa168H, with a refractive index of 1.68 and a thickness of 65 nm. The ITO conductive layer was prepared by magnetron sputtering and had a thickness of 230 nm.

[0043] Example 3

[0044] A dimming conductive film as shown in Figure 2 was obtained. The thickness of the substrate layer was 188 μm, and the main substrate was a PET substrate. The refractive index of both the first and second base coating layers was 1.53. The anti-adhesion layer was formed by wet coating of HG9530S from Huigu, with a refractive index of 1.53 and a thickness of 120 nm. The curing layer was formed by wet coating of KER-2500 from Shin-Etsu Chemicals, Japan, with a refractive index of 1.58 and a thickness of 580 nm. The anti-reflection layer was formed by coating of 19153 from Cargille, with a refractive index of 1.75 and a thickness of 75 nm. The ITO conductive layer was prepared by magnetron sputtering and had a thickness of 230 nm.

[0045] Example 4

[0046] A dimming conductive film as shown in Figure 2 was obtained. The thickness of the substrate layer was 188 μm, and the main substrate was a PET substrate. The refractive index of both the first and second base coating layers was 1.53. The anti-adhesion layer was formed by wet coating of HG9530S from Huigu, with a refractive index of 1.53 and a thickness of 120 nm. The curing layer was formed by wet coating of KER-2500 from Shin-Etsu Chemical Co., Ltd. of Japan, with a refractive index of 1.58 and a thickness of 580 nm. The anti-reflection layer was formed by coating of Lien and NOa168H, with a refractive index of 1.68 and a thickness of 70 nm. The ITO conductive layer was prepared by magnetron sputtering and had a thickness of 180 nm.

[0047] Example 5

[0048] A dimming conductive film as shown in Figure 2 was obtained. The thickness of the substrate layer was 188 μm, and the main substrate was a PET substrate. The refractive index of both the first and second base coating layers was 1.53. The anti-adhesion layer was formed by wet coating of HG9530S from Huigu, with a refractive index of 1.53 and a thickness of 120 nm. The curing layer was formed by wet coating of KER-2500 from Shin-Etsu Chemical Co., Ltd. of Japan, with a refractive index of 1.58 and a thickness of 580 nm. The anti-reflection layer was formed by coating of Lien and NOa168H, with a refractive index of 1.68 and a thickness of 70 nm. The ITO conductive layer was prepared by magnetron sputtering and had a thickness of 180 nm.

[0049] Comparative Example 1

[0050] A dimming conductive film as shown in Figure 2 was obtained. The thickness of the substrate layer was 188 μm, and the main substrate was a PET substrate. The refractive index of both the first and second base coating layers was 1.53. The anti-adhesion layer was formed by wet coating of HG9530S from Huigu, with a refractive index of 1.53 and a thickness of 120 nm. The curing layer was formed by wet coating of KER-2500 from Shin-Etsu Chemical Co., Ltd. of Japan, with a refractive index of 1.58 and a thickness of 580 nm. The anti-reflection layer was formed by coating of Lien and NOa168H, with a refractive index of 1.68 and a thickness of 60 nm. The ITO conductive layer was prepared by magnetron sputtering and had a thickness of 230 nm.

[0051] Comparative Example 2

[0052] A dimming conductive film as shown in Figure 2 was obtained. The thickness of the substrate layer was 188 μm, and the main substrate was a PET substrate. The refractive index of both the first and second base coating layers was 1.53. The anti-adhesion layer was formed by wet coating of HG9530S from Huigu, with a refractive index of 1.53 and a thickness of 120 nm. The curing layer was formed by wet coating of KER-2500 from Shin-Etsu Chemical Co., Ltd. of Japan, with a refractive index of 1.58 and a thickness of 580 nm. The anti-reflection layer was formed by coating of Lien and NOa168H, with a refractive index of 1.63 and a thickness of 65 nm. The ITO conductive layer was prepared by magnetron sputtering and had a thickness of 230 nm.

[0053] Comparative Example 3

[0054] A dimming conductive film as shown in Figure 2 was obtained. The thickness of the substrate layer was 188 μm, and the main substrate was a PET substrate. The refractive index of both the first and second base coating layers was 1.53. The anti-adhesion layer was formed by wet coating of HG9530S from Huigu, with a refractive index of 1.53 and a thickness of 120 nm. The curing layer was formed by wet coating of KER-2500 from Shin-Etsu Chemical Co., Ltd. of Japan, with a refractive index of 1.58 and a thickness of 580 nm. The anti-reflection layer was formed by coating of Lien and NOa168H, with a refractive index of 1.68 and a thickness of 80 nm. The ITO conductive layer was prepared by magnetron sputtering and had a thickness of 230 nm.

[0055] The dimming conductive films obtained in Examples 1-4 and Comparative Examples 1-3 were subjected to the following performance tests:

[0056] (1) Transmittance: Tested using a haze meter, standard: ASTM D1003.

[0057] (2) Sheet resistance: Tested using a four-probe resistance tester.

[0058] (3)b ＊ Value: Measured by a colorimeter.

[0059] The data shown below was obtained.

[0060]

[0061] As can be seen from the table above, the dimming conductive film of this invention not only has good transmittance, but also... ＊ The value is also between 0 and 3, which meets the user's requirements and makes it easy for the user to use it to prepare dimming glass, so that the light of the dimming glass is neutral.

[0062] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0063] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dimming conductive film, characterized in that, The light-modulating conductive film includes a substrate layer, which comprises a substrate body and a first base coating and a second base coating disposed on opposite sides of the substrate body. The light-modulating conductive film further includes a hardening layer, an anti-reflection layer, and an ITO conductive layer sequentially stacked on the first base coating. The refractive indices of the first and second base coatings are 1.48~1.

53. The thickness of the anti-reflection layer is 65~75 nm, and the refractive index of the anti-reflection layer is 1.68~1.

75. The b... ＊ The value is between 0 and 3.

2. The dimming conductive film according to claim 1, characterized in that, The thickness of the ITO conductive layer is 150~300nm.

3. The dimming conductive film according to claim 1, characterized in that, The thickness of the hardened layer is 500~600nm.

4. The dimming conductive film according to claim 1, characterized in that, The refractive index of the hardened layer is 1.58~1.63 nm.

5. The dimming conductive film according to claim 1, characterized in that, The thickness of the substrate layer is 188~250nm.

6. The dimming conductive film according to claim 5, characterized in that, The thickness of the substrate layer is 188 nm.

7. The dimming conductive film according to claim 1, characterized in that, The substrate is primarily a PET substrate.

8. The dimming conductive film according to claim 1, characterized in that, An anti-adhesion layer is also provided on the side of the substrate layer opposite to the hardened layer.

9. The dimming conductive film according to claim 8, characterized in that, The thickness of the anti-adhesion layer is 120~130nm.

10. The dimming conductive film according to claim 8, characterized in that, The refractive index of the anti-adhesion layer is 1.53~1.56 nm.

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