A switchable light control film assembly
By combining an electrochromic layer, a liquid crystal dimming layer, and a polarization control layer, the problem of existing optical thin films being unable to flexibly adjust light is solved, enabling flexible adjustment of light transmittance, reflectance, and polarization state, and providing rapid response characteristics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN JINCHUANGHE NEW MATERIALS CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-06-23
Smart Images
Figure CN224399702U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical thin film technology, specifically to a control film assembly with switchable light. Background Technology
[0002] In existing optical thin film technologies, the functions of film components used to control light are relatively limited. For example, while ordinary sunshade films can reduce light transmittance and provide a certain degree of sun shading, their light control capabilities are fixed and cannot be flexibly adjusted according to the actual ambient light intensity and user needs. Utility Model Content
[0003] (a) Technical problems to be solved
[0004] To address the shortcomings of existing technologies, this invention provides a switchable light control film assembly that can quickly and flexibly switch the transmittance, reflectance, and polarization state of light according to actual needs. It also features good optical uniformity and low manufacturing cost, thus meeting the diverse light control requirements of different application scenarios and solving the problem of not being able to flexibly adjust according to the actual ambient light intensity and user needs.
[0005] (II) Technical Solution
[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:
[0007] A switchable light control film assembly includes a base layer, an electrochromic layer disposed on the upper part of the base layer, a liquid crystal dimming layer disposed on the upper part of the electrochromic layer, a polarization control layer disposed on the upper part of the liquid crystal dimming layer, a protective layer disposed on the upper part of the polarization control layer, and electrodes disposed on the electrochromic layer and the liquid crystal dimming layer are electrically connected to a driving circuit.
[0008] Furthermore, the base layer is a transparent PET film with a thickness of 50-100μm.
[0009] Furthermore, the electrochromic layer is a Prussian blue-based electrochromic material, which is uniformly coated on the substrate by vacuum evaporation, with a thickness of 1-5 μm, and the conductive electrodes on the electrochromic layer are electrically connected to the driving circuit.
[0010] Furthermore, the liquid crystal dimming layer is a polymer-dispersed liquid crystal material with a thickness of 10-20 μm. The liquid crystal dimming layer is sandwiched between two transparent electrodes, and the transparent electrodes are electrically connected to the driving circuit.
[0011] Furthermore, the protective layer is a transparent PC film with a thickness of 30-50 μm.
[0012] Furthermore, the drive circuit is electrically connected to an external ambient light sensor and a manual adjustment circuit, and the drive circuit is equipped with a corresponding manual control button.
[0013] (III) Beneficial Effects
[0014] Compared with the prior art, the present invention provides a controllable film assembly with switchable light, which has the following beneficial effects:
[0015] This invention, through the synergistic effect of an electrochromic layer, a liquid crystal dimming layer, and a polarization control layer, enables diversified adjustment of light transmittance, reflectance, and polarization state, meeting the light control needs of different environments and usage scenarios. It allows for flexible adjustment of light transmittance and is convenient to use. At the same time, the rapid response characteristics of the liquid crystal dimming layer enable the film assembly to switch between transparent and opaque states in a short time, greatly improving the timeliness of light control compared to traditional electrochromic films. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the liquid crystal dimming layer in this utility model;
[0018] Figure 3 This is a circuit control block diagram of the present invention.
[0019] In the diagram: 1. Base layer; 2. Electrochromic layer; 3. Liquid crystal dimming layer; 301. Transparent electrode; 4. Polarization control layer; 5. Protective layer; 6. Driving circuit. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Example
[0022] like Figure 1 , Figure 2 and Figure 3As shown, one embodiment of this utility model proposes a switchable light control film assembly, including a base layer 1, an electrochromic layer 2 disposed on the upper part of the base layer 1, a liquid crystal dimming layer 3 disposed on the upper part of the electrochromic layer 2, a polarization control layer 4 disposed on the upper part of the liquid crystal dimming layer 3, a protective layer 5 disposed on the upper part of the polarization control layer 4, and electrodes disposed on the electrochromic layer 2 and the liquid crystal dimming layer 3 are electrically connected to a driving circuit 6.
[0023] The base layer 1 is a transparent PET film with a thickness of 50-100μm, which provides mechanical support and stability for the entire control membrane assembly, ensuring that the membrane assembly is not easily deformed or damaged during use.
[0024] The electrochromic layer 2 is a Prussian blue electrochromic material, which is uniformly coated on the base layer 1 by vacuum evaporation, with a thickness of 1-5 μm. The conductive electrodes on the electrochromic layer 2 are electrically connected to the driving circuit 6. This layer achieves reversible color change through electrochemical reaction, thereby adjusting the light transmittance. When different voltages are applied, the electrochromic layer 2 can exhibit different color depths, thereby achieving adjustment of the light transmittance within the range of 10%-80%. When the voltage increases, the color deepens and the transmittance decreases; when the voltage decreases, the color lightens and the transmittance increases.
[0025] The liquid crystal dimming layer 3 is a polymer-dispersed liquid crystal material with a thickness of 10-20 μm. The liquid crystal dimming layer 3 is sandwiched between two transparent electrodes 301. The transparent electrodes 301 are electrically connected to the driving circuit 6. By applying an electric field to change the alignment direction of the liquid crystal molecules, the film assembly can quickly switch from a transparent to an opaque state. When no electric field is applied, the liquid crystal molecules are arranged randomly, and the light is scattered, so the film assembly is opaque. When an electric field is applied, the liquid crystal molecules are arranged in an orderly manner along the direction of the electric field, and the light can pass through smoothly, so the film assembly is transparent. The response time is less than 100 milliseconds.
[0026] Among them, the polarization control layer 4 uses a polarizer to polarize the transmitted light and adjust the polarization direction and degree of polarization. The polarization control layer 4 is bonded to the liquid crystal dimming layer 3 with high-viscosity OCA adhesive. Different types of polarizers, such as linear polarizers or circular polarizers, can be selected according to actual needs to achieve precise control of the polarization state of light.
[0027] Among them, the protective layer 5 is a transparent PC film with a thickness of 30-50μm, which protects the internal electrochromic layer 2, liquid crystal dimming layer 3 and polarization control layer 4 from external environmental factors such as dust, moisture and mechanical scratches, and extends the service life of the film assembly.
[0028] The driving circuit 6 is electrically connected to the external ambient light sensor and the manual adjustment circuit. The driving circuit is equipped with a corresponding manual control button, which allows the user to manually adjust the light control state of the film module according to their own needs. The driving circuit 6 can apply the corresponding voltage to the electrochromic layer 2 and the liquid crystal dimming layer 3 according to the detection signal of the external ambient light sensor or the user's manual control command, so as to realize the intelligent adjustment of the light control state of the film module.
[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A switchable light control film assembly, comprising a base layer (1), characterized in that: An electrochromic layer (2) is provided on the upper part of the base layer (1), a liquid crystal dimming layer (3) is provided on the upper part of the electrochromic layer (2), a polarization control layer (4) is provided on the upper part of the liquid crystal dimming layer (3), and a protective layer (5) is provided on the upper part of the polarization control layer (4). The electrodes provided on the electrochromic layer (2) and the liquid crystal dimming layer (3) are electrically connected to the driving circuit (6).
2. The switchable light control film assembly according to claim 1, characterized in that: The base layer (1) is a transparent PET film with a thickness of 50-100μm.
3. The switchable light control film assembly according to claim 1, characterized in that: The electrochromic layer (2) is a Prussian blue electrochromic material, which is uniformly coated on the base layer (1) by vacuum evaporation, with a thickness of 1-5 μm, and the conductive electrodes on the electrochromic layer (2) are electrically connected to the driving circuit (6).
4. The switchable light control film assembly according to claim 1, characterized in that: The liquid crystal dimming layer (3) is a polymer-dispersed liquid crystal material with a thickness of 10-20 μm. The liquid crystal dimming layer (3) is sandwiched between two transparent electrodes (301), and the transparent electrodes (301) are electrically connected to the driving circuit (6).
5. The switchable light control film assembly according to claim 1, characterized in that: The protective layer (5) is a transparent PC film with a thickness of 30-50 μm.
6. The switchable light control film assembly according to claim 1, characterized in that: The drive circuit (6) is electrically connected to the external ambient light sensor and the manual adjustment circuit, and the drive circuit is equipped with a corresponding manual control button.