A light control film and light control glass that reinforce an electrode structure
By covering the conductive leads with tape, the problem of micro-detachment of conductive leads caused by film creep in the dimming glass is solved, ensuring good conductive contact and extending the service life of the dimming glass and the integrity of the circuit.
Patent Information
- Application Number
- CN202522692181.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-12-18
AI Technical Summary
In smart glass, the adhesive film can easily stick to the conductive leads, causing slight creep of the film during thermal expansion and contraction. This can lead to micro-detachment between the conductive leads and the transparent conductive layer, resulting in poor contact and affecting the function of the smart glass.
Cover the conductive leads with tape to isolate the influence of the adhesive film on the conductive leads, maintain good contact between the conductive leads and the transparent conductive layer, and prevent micro-detachment.
It effectively prevents poor contact between conductive leads and transparent conductive layers, extends the service life of dimming films and dimming glass products, and ensures circuit integrity.
Smart Images
Figure CN224682498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic light control materials, and in particular to a dimming film and dimming glass with enhanced electrode structure. Background Technology
[0002] A dimming film is an electronic light-controlling device, primarily consisting of a light-controlling layer placed between two transparent conductive films. When an electric field is applied, the arrangement or state of the materials in the light-controlling layer changes, thereby altering the light transmission characteristics of the device, such as switching from low to high transmittance, or vice versa. Through the action of the electric field, rapid transitions between the on and off states can be achieved. Based on different light-controlling mechanisms, dimming films can be classified into suspended particle dimming films, polymer-dispersed liquid crystal dimming films, and electrochemical reaction dimming films, among others.
[0003] Dimming films are typically used to manufacture dimming glass. For dimming glass products, a laminated structure is a common choice. This structure requires an adhesive film to bond the glass and the dimming film together, providing the dimming glass with certain mechanical properties and encapsulating and protecting the dimming film. However, the applicant discovered during actual manufacturing that after the dimming film is made into dimming glass, the adhesive film easily adheres to the conductive leads. During the use of the dimming glass, due to internal stresses such as thermal expansion and contraction, the adhesive film undergoes slight creep, causing micro-detachment between the conductive leads and the transparent conductive layer that is difficult to detect with the naked eye. This results in poor contact between the conductive leads and the transparent conductive layer of the dimming film, leading to the malfunction of the dimming glass.
[0004] This invention covers the conductive leads with tape, ensuring that the adhesive film in the dimming glass product can only contact the tape. In this way, the slight creep of the adhesive film will only affect the tape and will not cause deformation of the conductive leads or micro-detachment between them and the transparent conductive layer. This maintains good contact between the conductive leads and the transparent conductive layer in the dimming film, resulting in significant practical application effects. Summary of the Invention
[0005] The applicant proposed a dimming film with enhanced electrode structure. By covering the conductive leads with adhesive tape, the influence of the adhesive film on the conductive leads can be effectively isolated, thereby ensuring good contact between the conductive leads and the transparent conductive layer in the dimming film. This avoids micro-detachment of the conductive leads from the transparent conductive layer during actual use, and ensures the actual application effect and service life of the dimming film / glass products.
[0006] A first aspect of this invention provides a dimming film with an enhanced electrode structure, comprising: A first transparent substrate (1-1), a second transparent substrate (1-2), and a light-controlling layer (2) disposed between the first transparent substrate (1-1) and the second transparent substrate (1-2). A first transparent conductive layer (3-1) is disposed between the first transparent substrate (1-1) and the light control layer (2), and a second transparent conductive layer (3-2) is disposed between the second transparent substrate (1-2) and the light control layer (2). A first conductive lead (4-1) is provided on the first transparent conductive layer (3-1), and a second conductive lead (4-2) is provided on the second transparent conductive layer (3-2). The first conductive lead (4-1) and / or the second conductive lead (4-2) are covered with tape (5).
[0007] Furthermore, the tape (5) covers the portion of the first conductive lead (4-1) and the second conductive lead (4-2) that are stacked on the dimming film.
[0008] Furthermore, the first conductive lead (4-1) and the second conductive lead (4-2) are selected from at least one of conductive metal sheets and FPC (Flexible Printed Circuit).
[0009] Furthermore, there is at least one first conductive lead (4-1) and one second conductive lead (4-2).
[0010] Furthermore, the first conductive lead (4-1) is electrically connected to and covers the first conductive metal strip (6-1), and the second conductive lead (4-2) is electrically connected to and covers the second conductive metal strip (6-2).
[0011] Furthermore, the first conductive metal strip (6-1) is electrically connected and covers the cured first conductive adhesive (7-1), and the second conductive metal strip (6-2) is electrically connected and covers the cured second conductive adhesive (7-2).
[0012] Furthermore, the first conductive metal strip (6-1) and the second conductive metal strip (6-2) are conductive metal tapes.
[0013] Furthermore, the first conductive metal strip (6-1) and the second conductive metal strip (6-2) are conductive Cu tapes.
[0014] Furthermore, the cured first conductive adhesive (7-1) is electrically connected and covers the first transparent conductive layer (3-1), and the cured second conductive adhesive (7-2) is electrically connected and covers the second transparent conductive layer (3-2).
[0015] Furthermore, the cured first conductive adhesive (7-1) and the cured second conductive adhesive (7-2) are formed by curing conductive ink.
[0016] Furthermore, the cured first conductive adhesive (7-1) and the cured second conductive adhesive (7-2) are formed by curing conductive silver paste.
[0017] Furthermore, the tape (5) is an insulating plastic film.
[0018] Furthermore, the tape (5) is permitted to be used at a temperature not lower than 120°C.
[0019] Furthermore, the thickness of the tape (5) ranges from 30 to 300 micrometers.
[0020] Furthermore, the adhesive of the tape (5) is at least one of silicone resin and butyl rubber.
[0021] Furthermore, the adhesive of the tape (5) is silicone resin, selected from NITOFLON™ No.923UT manufactured by Nitto Corporation, which is a fluoroplastic (PTFE) film silicone resin adhesive tape; or selected from 3M™ Polyimide Film Tape 5413, 3M™ Polyimide Film Tape 5419, 3M™ Polyimide Tape8997, tesa® 51407, which are all polyimide film silicone resin adhesive tapes.
[0022] Furthermore, the 180° peel strength of the tape (5) is 2~20 N / cm.
[0023] Furthermore, the first transparent substrate (1-1) and the second transparent substrate (1-2) are transparent plastic sheets; And / or, the first transparent conductive layer (3-1) and the second transparent conductive layer (3-2) are each independently selected from one or more of the following: ITO conductive layer, FZO conductive layer, IZO conductive layer, GZO conductive layer, AZO conductive layer, PEDOT conductive layer, nano Ag wire conductive layer, conductive graphene, conductive polymer and nano Cu wire conductive layer; And / or, the light control layer (2) includes at least one of a suspended particle light control layer, a polymer dispersed liquid crystal light control layer, and an electrochromic light control layer.
[0024] A second aspect of this utility model provides a dimming glass with an enhanced electrode structure, comprising: A first transparent substrate (8-1), a second transparent substrate (8-2), and the aforementioned dimming film (10) disposed between the first transparent substrate (8-1) and the second transparent substrate (8-2). A first adhesive film (9-1) is disposed between the first transparent substrate (8-1) and the dimming film (10), and a second adhesive film (9-2) is disposed between the second transparent substrate (8-2) and the dimming film (10).
[0025] Furthermore, the first transparent substrate (8-1) and / or the second transparent substrate (8-2) are independently selected from at least one of transparent glass plate and transparent plastic sheet.
[0026] In this invention, there are no special restrictions on the type of transparent glass plate. It can be any transparent glass commonly used for dimming glass that is well known to those skilled in the art. It can be ordinary glass such as inorganic glass or organic glass, or functional glass such as UV blocking glass, IR blocking glass, Low-E glass, tempered glass or antibacterial glass, etc. It can also be selected from colored glass such as gray glass or brown glass.
[0027] Further, the first adhesive film (9-1) and / or the second adhesive film (9-2) are independently selected from at least one of PVB adhesive film, EVA adhesive film, TPU adhesive film, functional PVB adhesive film, functional EVA adhesive film, functional TPU adhesive film, colored PVB adhesive film, colored EVA adhesive film and colored TPU adhesive film.
[0028] A third aspect of this utility model provides a method for preparing dimming glass with an enhanced electrode structure, comprising the following steps: The dimming glass is obtained by laminating the layers according to the aforementioned structure of dimming glass.
[0029] Furthermore, the temperature of the lamination process is 90~140℃ and the pressure is 0.1~1.5MPa.
[0030] Furthermore, the laminating equipment can be a laminator, an autoclave, or a laminating box / furnace.
[0031] A fourth aspect of this utility model provides a dimming glass article with an enhanced electrode structure, which is prepared from the aforementioned dimming glass or the aforementioned preparation method.
[0032] Furthermore, the dimming glass product with the enhanced electrode structure is an automotive window glass, a panoramic glass, or a glass curtain wall.
[0033] This invention proposes a method for preparing a dimming film by covering the surface of conductive leads with adhesive tape to construct a reinforced electrode structure. This method effectively isolates the direct adhesion between the adhesive film and the conductive leads, avoiding the risk of physical deformation of the adhesive film caused by changes in the external environment, which in turn pulls on the conductive leads and causes micro-detachment. It fundamentally eliminates the fault of poor contact between the conductive leads and the transparent conductive layer, ultimately ensuring the circuit integrity of the dimming film and dimming glass products, and significantly extending their service life. Attached Figure Description
[0034] 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. The drawings described below are merely embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without any creative effort.
[0035] Figure 1 This is a top view schematic diagram of the electrodes of the dimming film in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the electrode AA section of the dimming film in Embodiment 1 of this utility model, with the transparent substrate omitted; Figure 3 This is a top view schematic diagram of the electrodes of the dimming film in Embodiment 2 of this utility model; Figure 4 This is a schematic diagram of the electrode AA section of the dimming film in Embodiment 2 of this utility model, with the transparent substrate omitted; Figure 5 This is a schematic diagram of a cross-section of the dimming glass prepared in Embodiment 3 of this utility model; Figure 6 This is a top view schematic diagram of the electrodes of the dimming film in Comparative Example 1 of this utility model; Figure 7 This is a schematic diagram of the electrode AA of the dimming film in Comparative Example 1 of this utility model, with the transparent substrate omitted; Among them, 2 is the light control layer, 3-1 is the first transparent conductive layer, 3-2 is the second transparent conductive layer; 4-1 is the first conductive lead, 4-2 is the second conductive lead, 5-1 is the first adhesive tape, 5-2 is the second adhesive tape, 6-1 is the first conductive metal strip, 6-2 is the second conductive metal strip, 7-1 is the cured first conductive adhesive, 7-2 is the cured second conductive adhesive, 8-1 is the first transparent substrate, 8-2 is the second transparent substrate, 9-1 is the first adhesive film, 9-2 is the second adhesive film, and 10 is the dimming film. Detailed Implementation
[0036] In this utility model, the concepts of the first transparent substrate, the second transparent substrate, the first transparent conductive layer, the second transparent conductive layer, the first transparent substrate, the second transparent substrate, the first adhesive film, and the second adhesive film only indicate the relative relationship between the two, and are not limiting conditions. They do not necessarily have to be a first and second relationship, but can also be a positional relationship such as up, down, front, back, left, right, etc.
[0037] In this invention, the 180° peel strength of the tape is tested according to the method in Chapter 5 of GB / T 2792-2014.
[0038] In this invention, the contact between the conductive leads and the transparent conductive layer of the dimming film is verified through a thermal shock test. Specifically, the prepared dimming glass is placed in an environment of 105°C for 1 hour, then transferred to an environment of -10°C for 1 hour, and this cycle is repeated 500 times. The dimming glass is then connected to a rated power supply to check if it functions properly. After testing 100 pieces of dimming glass, the defect rate is calculated to determine the effectiveness of the technical means of this invention.
[0039] To better illustrate this utility model, the following specific embodiments are provided.
[0040] Example 1: Dimming Film The suspended particle dimming film is used, wherein a transparent plastic sheet PET is used as the first transparent substrate (1-1) and the second transparent substrate (1-2), an ITO conductive layer is used as the first transparent conductive layer (3-1) and the second transparent conductive layer (3-2), and the light control layer (2) is a suspended particle light control layer; Part of the first transparent substrate (1-1), the corresponding first transparent conductive layer (3-1), and the corresponding light-controlling layer (2) are removed from the edge of the dimming film to expose the corresponding second transparent conductive layer (3-2). Part of the second transparent substrate (1-2), the corresponding second transparent conductive layer (3-2), and the corresponding light-controlling layer (2) are then removed from the edge of the dimming film to expose the corresponding first transparent conductive layer (3-1). Conductive silver paste is applied to localized areas of the exposed first transparent conductive layer (3-1) and second transparent conductive layer (3-2). After drying at 80°C, first conductive adhesive (7-1) and second conductive adhesive (7-2) are formed respectively. Then, 2... A conductive copper tape is attached to the first conductive adhesive (7-1) and the second conductive adhesive (7-2) respectively to form the first conductive metal strip (6-1) and the second conductive metal strip (6-2). Then, two FPCs are attached to the first conductive metal strip (6-1) and the second conductive metal strip (6-2) respectively to form the first conductive lead (4-1) and the second conductive lead (4-2). Using NITOFLON™ No. 923UT tape manufactured by Nitto Corporation, with a 180° peel strength of 6.2 N / cm, the tape was used to cover the portions of the first conductive lead (4-1) and the second conductive lead (4-2) on the dimming film, respectively, to obtain Example 1 of the suspended particle dimming film. A top-view schematic diagram of the electrodes is attached. Figure 1 A schematic diagram of the electrode cross-section is shown in Figure 2.
[0041] Example 2: Dimming Film A polymer-dispersed liquid crystal dimming film is used, wherein a transparent plastic sheet PET is used as the first transparent substrate (1-1) and the second transparent substrate (1-2), an FZO conductive layer is used as the first transparent conductive layer (3-1) and the second transparent conductive layer (3-2), and the light control layer (2) is a polymer-dispersed liquid crystal light control layer; Part of the first transparent substrate (1-1), the corresponding first transparent conductive layer (3-1), and the corresponding light-controlling layer (2) are removed from the edge of the dimming film to expose the corresponding second transparent conductive layer (3-2). Part of the second transparent substrate (1-2), the corresponding second transparent conductive layer (3-2), and the corresponding light-controlling layer (2) are then removed from the edge of the dimming film to expose the corresponding first transparent conductive layer (3-1). Conductive silver paste is applied to localized areas of the exposed first transparent conductive layer (3-1) and second transparent conductive layer (3-2). After drying at 80°C, first conductive adhesive (7-1) and second conductive adhesive (7-2) are formed respectively. Then, 2... A conductive copper tape is attached to the first conductive adhesive (7-1) and the second conductive adhesive (7-2) respectively to form the first conductive metal strip (6-1) and the second conductive metal strip (6-2). Then, two FPCs are attached to the first conductive metal strip (6-1) and the second conductive metal strip (6-2) respectively to form the first conductive lead (4-1) and the second conductive lead (4-2). 3M™ Polyimide Film Tape 5413 manufactured by 3M Company was used, with a 180° peel strength of 4.5 N / cm. The tape was used to cover the portions of the first conductive lead (4-1) and the second conductive lead (4-2) on the dimming film, respectively, to obtain Example 2 of polymer-dispersed liquid crystal dimming film. A top view of the electrodes is shown in the attached diagram. Figure 3 See attached schematic diagram of electrode cross-section. Figure 4 .
[0042] Example 3: Smart Glass Ordinary tempered glass was used as the first transparent substrate (8-1) and the second transparent substrate (8-2). EVA film was used as the first adhesive film (9-1) and the second adhesive film (9-2). The dimming film (10) prepared in Example 1 was used. The layers were stacked in the order of first transparent substrate (8-1), first adhesive film (9-1), dimming film (10), second adhesive film (9-2), and second transparent substrate (8-2). The film was laminated in an autoclave at a temperature of 110°C, a pressure of 0.5 MPa, and a time of 30 min to obtain dimming glass Example 3. A cross-sectional schematic diagram is shown in Figure 5.
[0043] Example 4: Smart Glass Organic glass was used as the first transparent substrate (8-1) and the second transparent substrate (8-2), and PVB film was used as the first adhesive film (9-1) and the second adhesive film (9-2). The dimming film (10) prepared in Example 2 was used. The layers were stacked in the order of first transparent substrate (8-1), first adhesive film (9-1), dimming film (10), second adhesive film (9-2), and second transparent substrate (8-2). The film was laminated in an autoclave at a temperature of 120°C, a pressure of 0.8 MPa, and a time of 30 min to obtain dimming glass Example 4.
[0044] Comparative Example 1: Dimming Film The preparation process is the same as in Example 1, except that there is no tape (5-1) and tape (5-2).
[0045] Comparative Example 2: Dimming Film The preparation process is the same as in Example 2, except that there is no tape (5-1) and tape (5-2).
[0046] Comparative Example 3: Dimmable Glass The preparation process is the same as in Example 3, except that the dimming film prepared in Comparative Example 1 is used.
[0047] Comparative Example 4: Dimmable Glass The preparation process is the same as in Example 4, except that the dimming film prepared in Comparative Example 2 is used.
[0048] One hundred pieces of dimming glass from each of Examples 3, 4, Comparative Example 3, and Comparative Example 4 were prepared (the size of the dimming glass was 300x300mm, and the size of the dimming film was 260x260mm). The defect rate was statistically analyzed by thermal shock test, and the results are listed in Table 1.
[0049] Table 1 Defect Rate of Products Tested in Thermal Shock Test Example 3 0.0 Example 4 0.0 Comparative Example 3 8.0 Comparative Example 4 6.0 As can be seen from the data in Table 1, compared with Comparative Example 3 and Example 3, and Comparative Example 4 and Example 4, the defect rate of the products represented by the technical solutions of this application in the examples is 0, which is significantly lower than the defect rates of 6.0% and 8.0% of the prior art products represented by the comparative examples. This shows that the technical solution has significant technical effects and can eliminate the problem of dimming glass malfunction caused by poor contact between conductive leads and transparent conductive layers. This has significant practical significance for ensuring the circuit integrity of dimming film / glass products and extending their service life.
[0050] The above description of the embodiments is merely to aid in understanding the method and core ideas of this utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A dimming film with enhanced electrode structure, characterized in that, include: A first transparent substrate (1-1), a second transparent substrate (1-2), and a light-controlling layer (2) disposed between the first transparent substrate (1-1) and the second transparent substrate (1-2); a first transparent conductive layer (3-1) is disposed between the first transparent substrate (1-1) and the light-controlling layer (2), and a second transparent conductive layer (3-2) is disposed between the second transparent substrate (1-2) and the light-controlling layer (2); a first conductive lead (4-1) is disposed on the first transparent conductive layer (3-1), and a second conductive lead (4-2) is disposed on the second transparent conductive layer (3-2); wherein, the first conductive lead (4-1) and / or the second conductive lead (4-2) are covered with tape (5).
2. The dimming film with enhanced electrode structure according to claim 1, characterized in that, The tape (5) covers the portion of the first conductive lead (4-1) and the second conductive lead (4-2) that are stacked on the dimming film.
3. The dimming film with enhanced electrode structure according to claim 1, characterized in that, The first conductive lead (4-1) is electrically connected and covers the first conductive metal strip (6-1), and the second conductive lead (4-2) is electrically connected and covers the second conductive metal strip (6-2).
4. The dimming film with enhanced electrode structure according to claim 3, characterized in that, The first conductive metal strip (6-1) is electrically connected and covers the cured first conductive adhesive (7-1), and the second conductive metal strip (6-2) is electrically connected and covers the cured second conductive adhesive (7-2).
5. The dimming film with enhanced electrode structure according to claim 3, characterized in that, The first conductive metal strip (6-1) and the second conductive metal strip (6-2) are conductive Cu tapes.
6. The dimming film with enhanced electrode structure according to claim 4, characterized in that, The cured first conductive adhesive (7-1) is electrically connected and covers the first transparent conductive layer (3-1), and the cured second conductive adhesive (7-2) is electrically connected and covers the second transparent conductive layer (3-2).
7. The dimming film with enhanced electrode structure according to claim 4, characterized in that, The cured first conductive adhesive (7-1) and the cured second conductive adhesive (7-2) are formed by curing conductive silver paste.
8. The dimming film with enhanced electrode structure according to claim 1, characterized in that, The tape (5) is permitted to be used at a temperature not lower than 120°C.
9. The dimming film with enhanced electrode structure according to claim 1, characterized in that, The 180° peel strength of the tape (5) is 2~20 N / cm.
10. The dimming film with enhanced electrode structure according to claim 1, characterized in that, The first transparent substrate (1-1) and the second transparent substrate (1-2) are transparent plastic sheets; And / or, the first transparent conductive layer (3-1) and the second transparent conductive layer (3-2) are each independently selected from one or more of the following: ITO conductive layer, FZO conductive layer, IZO conductive layer, GZO conductive layer, AZO conductive layer, PEDOT conductive layer, nano Ag wire conductive layer, conductive graphene, conductive polymer and nano Cu wire conductive layer; And / or, the light control layer (2) includes at least one of a suspended particle light control layer, a polymer-dispersed liquid crystal light control layer, and an electrochromic light control layer.
11. A dimming glass with an enhanced electrode structure, characterized in that, include: A first transparent substrate (8-1), a second transparent substrate (8-2), and a dimming film (10) according to any one of claims 1 to 10 disposed between the first transparent substrate (8-1) and the second transparent substrate (8-2); a first adhesive film (9-1) is disposed between the first transparent substrate (8-1) and the dimming film (10), and a second adhesive film (9-2) is disposed between the second transparent substrate (8-2) and the dimming film (10).
12. The dimming glass according to claim 11, characterized in that, The first transparent substrate (8-1) and / or the second transparent substrate (8-2) are independently selected from at least one of transparent glass plate and transparent plastic sheet.
13. The dimming glass according to claim 11, characterized in that, The first adhesive film (9-1) and / or the second adhesive film (9-2) are independently selected from at least one of PVB adhesive film, EVA adhesive film, TPU adhesive film, functional PVB adhesive film, functional EVA adhesive film, functional TPU adhesive film, colored PVB adhesive film, colored EVA adhesive film and colored TPU adhesive film.