CN108845469A - A kind of electrochromic device that color can be customized arbitrarily and application - Google Patents

Abstract

The invention provides an electrochromic device whose color can be customized arbitrarily, which belongs to the technical field of electrochromic devices, including a transparent substrate layer and an EC stack, and also includes an optical film layer and/or a rubber bottom layer; the rubber bottom layer is covered on On the transparent substrate layer, the optical film layer and the EC stack are sequentially arranged in the bottom layer of the glue; or, the optical film layer is covered on the transparent substrate layer, the bottom layer of the glue is covered on the optical film layer, and the EC stack is covered Between the optical film layer and the transparent substrate layer or between the optical film layer and the subbing layer or in the subbing layer. It is used in mobile terminals, building doors and windows and home appliances. Through optical adjustment, the surface of the electrochromic device can obtain any customized reflection effect, so that the product has a better surface texture like metal; the optical film layer can protect the EC stack, and the dense optical film layer EC stack is no longer easily affected by water vapor. life, greatly improving product reliability.

Description

An electrochromic device with arbitrarily customizable color and its application

technical field

The invention relates to an electrochromic device whose color can be customized arbitrarily and its application, belonging to the technical field of electrochromic devices.

Background technique

Electrochromism refers to the reversible oxidation or reduction reaction of the material under the action of the polarity and intensity changes of the applied electric field, resulting in a reversible and stable change in the color of the material. The electrochromic device prepared by using this property can intelligently adjust the radiation of light, and can selectively absorb or reflect the external heat radiation. The electrochromic device prepared by using this property can be used in various applications that require changes in appearance and color. field.

The electrochromic stack (hereinafter referred to as the EC stack) is composed of a bottom transparent conductive layer, an electrochromic layer, an ion conductive layer, an ion storage layer and a top transparent conductive layer. Under the action of the electric field, the ions in the ion storage layer enter the electrochromic layer through the ion conducting layer to realize the color changing effect; coupled with the reverse electric field, the ions will leave the electrochromic layer and return to the ion storage layer through the ion conducting layer to realize fading. All-solid-state intelligent electrochromic glass technology uses inorganic transition metal oxides as electrochromic materials, uses inorganic lithium-containing compounds as ion-conducting layers, and relies on the extraction and injection of lithium ions to control the discoloration of the glass.

The applicant also applied for the application number 201510231273.1 before, which is called a preparation method of an all-solid-state electrochromic device and the produced electrochromic glass, and discloses the structure and characteristics of the EC stack.

In the prior art, electrochromic devices have a single color and no texture. For example, all-solid-state devices often have a light yellow-green color before discoloration, which is not beautiful enough, so it is not easy to be accepted in practical applications or is limited in some occasions. its application.

In view of this, the applicant conducted special research on this, and developed an electrochromic device and its application whose color can be customized arbitrarily, and this case arose from it.

Contents of the invention

In order to solve the above-mentioned defects in the prior art, the first object of the present invention is to provide an electrochromic device whose color can be customized arbitrarily.

In order to realize above-mentioned first object, the technical scheme that the present invention takes is as follows:

An electrochromic device whose color can be customized arbitrarily comprises a transparent substrate layer and an EC stack, and is characterized in that: it also includes an optical film layer and/or an adhesive primer layer; the adhesive primer layer is covered on the transparent substrate layer, and the The optical film layer and the EC stack are sequentially arranged in the subbing layer; or, the optical film layer is overlaid on the transparent substrate layer, the subbing layer is overlaid on the optical film layer, and the EC stacking layer is overlaid on the optical film layer and the transparent substrate layer Between the layers or between the optical film layer and the subbing layer or in the subbing layer.

In order to obtain a product with arbitrarily customizable color before discoloration when used as a door and window, the adhesive base layer includes a transparent adhesive layer as an inner layer, and a color base layer/another layer as an outer layer on the transparent adhesive layer. Transparent substrate layer; transparent adhesive layer plays the role of bonding and explosion protection. In order to absorb the transmitted light and prevent secondary reflection, the color base layer is made of black PET or a material with similar functions; in order to obtain a product with any customizable color before discoloration, the color base layer is made of PET with the color that needs to be customized. or similar functional materials. The color base layer and the optical film layer together determine the color of the device before discoloration.

Or in order to obtain the color that can be customized before the product changes color, the bottom layer of the glue is an ink layer;

Or in order to obtain a product with arbitrarily customizable color before discoloration when used as a door and window, the adhesive primer layer includes a hollow layer as an inner layer, and another transparent substrate layer as an outer layer covering the hollow layer.

Further, the transparent adhesive layer adopts film or glue, the film adopts PVB or a film with similar functions, and the glue adopts OCA or optical glue with similar functions; the color base layer adopts PET or has similar functions materials, and customized colors according to needs, the ink uses glossy two-component solvent-based ink for glass or other color inks.

Further, the optical film layer is obtained by alternately depositing high-refractive-index materials and low-refractive-index materials by one or more of evaporation, sputtering, and ion plating. The optical film layer is obtained by alternate deposition of high refractive index material and low refractive index material through physical vapor deposition.

Further, the high refractive index material uses titanium oxide TiO2 or niobium oxide Nb ₂ O ₅ , and the low refractive index material uses SiO ₂ .

Further, the optical film layer is adjusted to the required reflection or transmission spectrum through spectrum to realize color customization.

Further, the transparent substrate layer is made of glass or transparent resin material.

Further, the hollow layer adopts insulating glass.

There must be one or more of the optical film layer, color base layer, and ink layer in the structure of the electrochromic device.

For the preparation method of the EC stack, please refer to the method disclosed in the applicant's previous application number 201510231273.1, titled a preparation method of an all-solid-state electrochromic device and the prepared electrochromic glass.

The preparation method of an electrochromic device whose color can be customized arbitrarily according to the present invention is as follows:

The preparation method of an electrochromic device whose color can be customized arbitrarily according to the present invention is prepared by sequentially covering the corresponding film layers on the transparent substrate:

In order to customize the color arbitrarily, the optical film layer adjusts the spectrum to the required reflection or transmission band to achieve color customization. When the device of the present invention is used as a transmission, such as doors and windows, it is necessary to increase the transmittance of the band corresponding to the target color; when the device of the present invention is used as a reflection, such as the back cover of a mobile phone, it is necessary to increase the reflectance of the band corresponding to the target color.

The preparation method of the EC stack can be any one of evaporation, sputtering and ion plating in physical vapor deposition (PVD), preferably magnetron sputtering.

The optical film can be prepared by any one of evaporation, sputtering and ion plating in physical vapor deposition (PVD), preferably by electron beam evaporation.

The OCA optical adhesive layer is prepared by curing with ultraviolet light (UV) after coating.

PVB film is prepared by hot pressing with lamination equipment.

The ink layer is prepared by screen printing method.

The second object of the present invention is to provide the application of electrochromic devices with several colors that can be customized arbitrarily, which are applied to mobile terminals (such as mobile phones, PAD back covers), architectural doors and windows (hollow glass, laminated glass) and home appliances (such as wine cabinet, refrigerator door glass).

In the present invention, the optical film layer is matched with black PET to realize the principle that the color can be customized arbitrarily:

(1) In the initial state, both the transparent substrate layer and the EC stack are in a transparent state, through which light can reach the optical film layer.

(2) The optical film layer chooses materials with different high and low refractive indices, namely TiO2 and SiO ₂ , respectively. By alternately depositing a specific optical thickness, the spectrum of different visible light bands that can be selected to be transmitted or reflected can be obtained, and the appearance color can be customized arbitrarily. the goal of.

The color base layer used, such as black PET material, is used to absorb all the light of other colors transmitted through the optical film layer after selective reflection, so as to prevent secondary reflection.

(3) When driving forward, the electrochromic layer in the EC stack will absorb all the visible light and turn it black, and the light will not pass through the EC stack to reach the optical film layer, so the color of the device is black.

The color PET in the present invention realizes the principle that the color can be customized arbitrarily:

(1) In the initial state, both the transparent substrate layer and the EC stack are in a transparent state, through which light can reach the colored PET.

(2) Colored PET is different from optical films. It does not adjust the complementary adjustment of reflection and transmission, but absorbs light of a specific color, reflects and transmits light of its complementary color to achieve the purpose of arbitrarily customizable appearance color.

(3) When driving forward, the electrochromic layer in the EC stack will absorb all the visible light and turn it black, and the light will not pass through the EC stack to reach the optical film layer, so the color of the device is black.

In the present invention, the principle that the color can be customized arbitrarily is consistent with that of colored PET.

The present invention can realize following technical effect:

(1) The optical film layer of the present invention can be customized arbitrarily according to the needs, and the optical film layer can be adjusted to the required reflection or transmission spectrum on the basis of the existing EC stack spectrum, so that the color of the device is no longer single, satisfying market diversification or in a certain previously unavailable requirements in some areas.

(2) The present invention allows the surface of the electrochromic device to obtain any customized reflection effect through optical adjustment, so that the product has a better surface texture like metal, and makes it possible for the electrochromic product to be applied to communication terminals and home appliances .

(3) The optical film layer of the present invention effectively protects the EC stack, and the dense optical film layer no longer makes the electrochromic device easily affected by water vapor and shortens the service life, greatly improving product reliability.

Description of drawings

Fig. 1 is the schematic structural view of the electrochromic device whose color can be customized arbitrarily in Example 1 before discoloration;

Fig. 2 is the structural schematic diagram of the electrochromic device whose color can be customized arbitrarily in Example 1 after discoloration;

Fig. 3 is the schematic structural diagram of the electrochromic device whose color can be customized arbitrarily in Example 2 before discoloration;

Fig. 4 is the structural schematic diagram of the electrochromic device whose color can be customized arbitrarily in embodiment 2 after discoloration;

Fig. 5 is the schematic structural view of the electrochromic device whose color can be customized arbitrarily in Example 3-4 before discoloration;

Fig. 6 is the structural schematic diagram of the electrochromic device whose color can be customized arbitrarily in embodiment 3-4 after discoloration;

Fig. 7 is a schematic structural view of the electrochromic device whose color can be customized arbitrarily in Example 5 before discoloration;

Fig. 8 is the structural schematic diagram of the electrochromic device whose color can be customized arbitrarily in Example 5 after discoloration;

Fig. 9 is a schematic structural view of the electrochromic device whose color can be customized arbitrarily in Example 6-7 before discoloration;

Fig. 10 is a structural schematic diagram of the electrochromic device whose color can be customized arbitrarily in Example 6-7 after discoloration;

Figure 11 is a schematic structural view of the electrochromic device whose color can be customized arbitrarily in Example 8 before discoloration;

Fig. 12 is a structural schematic diagram of the electrochromic device whose color can be customized arbitrarily in Example 8 after discoloration;

Figure 13 is a schematic structural view of the electrochromic device whose color can be customized arbitrarily in Example 9 before discoloration;

Fig. 14 is a structural schematic diagram of the electrochromic device whose color can be customized arbitrarily in Example 9 after discoloration;

Fig. 15 is a schematic structural view of the electrochromic device whose color can be customized arbitrarily in Example 10 before discoloration;

Fig. 16 is a schematic structural diagram of the electrochromic device whose color can be customized arbitrarily in Example 10 after discoloration.

Labeling instructions: transparent substrate layer 100, EC stack 200, EC stack 201 after power on, optical film layer 300, adhesive base layer 400, PVB film 401, black PET 402, OCA optical adhesive layer 403, color base layer (non-black) 404, ink layer 405, another transparent substrate layer 406, hollow layer 407, light source 500, incident light 600, reflected light before discoloration 700, reflected light after discoloration 700', among which 701, 702, 703, 704, 705 are reflected light from different interfaces.

Detailed ways

In order to disclose the technical means of the present invention and the technical effects that can be achieved more clearly and completely, the following embodiments are provided hereby, and the following detailed descriptions are given in conjunction with the accompanying drawings:

Example 1

As shown in Figures 1 and 2, Figure 1 is a schematic structural diagram of the electrochromic device whose color can be customized in Example 1 before discoloration; Figure 2 is a schematic structural diagram of the electrochromic device whose color can be customized in Example 1 after discoloration; The electrochromic device of this embodiment is applied to the back cover of a mobile terminal (mobile phone), and various customized colors such as light blue become black. The layered structure of the electrochromic device is as follows: transparent substrate layer 100, EC stack 200, optical Film layer 300 , OCA optical adhesive layer 403 and black PET 402 . At present, six kinds of optical film layers 300 of film systems have been successfully tested, as shown in the table below.

Table 1 Light blue optical film system scheme

layers Material Thickness (nm) 1 TiO2 20.96 2 SiO ₂ 71.17 3 TiO2 41.93 4 SiO ₂ 71.17 5 TiO2 20.96

Table 2 Dark blue optical film system scheme

Table 3 Light red optical film system scheme

layers Material Thickness (nm) 1 TiO2 89.20 2 SiO ₂ 78.48 3 TiO2 48.98 4 SiO ₂ 83.00 5 TiO2 22.10 6 SiO ₂ 23.14 7 TiO2 66.41 8 TiO2 11.98 9 TiO2 24.66 10 SiO ₂ 187.61

Table 4 Deep red optical film system scheme

Table 5 Light green optical film system scheme

layers Material Thickness (nm) 1 TiO2 92.13 2 SiO2 47.27 3 TiO2 17.97 4 SiO2 129.55 5 TiO2 72.06 6 SiO2 84.65

Table 6 Dark green optical film system scheme

Before discoloration: The mobile terminal does not power on the EC stack 200, so the incident light 600 can pass through the EC stack 200 and reach the subsequent layers. The transmitted light intensity may be reduced. When passing through the optical film layer 300, since the optical film layer 300 adopts the film system scheme in the above table, and is obtained by alternately depositing high-refractive index materials and low-refractive index materials through evaporation coating, the optical film layer is adjusted to the required reflection spectrum through the spectrum To realize color customization, black PET absorbs the light passing through the optical film layer to prevent secondary reflection, so this embodiment has been able to successfully customize a variety of colors, including light blue, dark blue, light red, deep red, light green, dark green etc. Taking light blue as an example, using the optical film layer in Table 1 can achieve the light blue light reflected by the optical film layer 300 before discoloration, that is, the reflected light 703 is light blue, thereby making the device appear light blue.

After discoloration: the mobile terminal electrifies the EC stack 200, the EC stack turns black and absorbs the incident light 600, so the incident light 600 cannot pass through the EC stack 201 and cannot reach the subsequent layers, so the reflected light 700' is black.

Example 2

As shown in Figure 3 and Figure 4, Figure 3 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 2 before discoloration, and Figure 4 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 2 after discoloration The electrochromic device of this embodiment is applied to the back cover of a mobile terminal (mobile phone), and the red color becomes black. The layered structure of the electrochromic device is as follows: transparent substrate layer 100, EC stack 200, optical film layer 300, OCA optical glue layer 403 and color base layer 404 .

Table 7 Anti-reflection and anti-reflection optical film system scheme

layers Material Thickness (nm) 1 MgF2 92.66 2 ZrO2 131.72 3 MgF2 30.31 4 ZrO2 16.54

Before discoloration: the mobile terminal does not power on the EC stack 200, so the incident light 600 can pass through the EC stack 200 and reach the color base layer 404. Before discoloration, the color base layer 404 is customized to be red, and the color base layer 404 reflects red light, that is, The light 705 is red, so that the device appears red, and the function of the optical film is to make the red color of the device more vivid.

After discoloration: the mobile terminal electrifies the EC stack 200, and the EC stack turns black, so the incident light 600 cannot pass through the EC stack 201 and cannot reach the subsequent layers, so the reflected light 700' is black.

Example 3

As shown in Figure 5 and Figure 6, Figure 5 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 3 before discoloration, and Figure 6 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 3 after discoloration ; The electrochromic device of this embodiment is applied to the back cover of the mobile terminal (PAD), and the blue color becomes black. The layered structure of the electrochromic device is as follows: transparent substrate layer 100, EC stack 200, optical film layer 300, and The ink layer 405, in this embodiment, the ink layer 405 is customized as blue ink.

Before discoloration: the mobile terminal does not power on the EC stack 200, so the incident light 600 can pass through the EC stack 200 and reach the ink layer 405. Before discoloration, the ink layer 405 is customized to be blue, and the ink layer 405 reflects blue light, that is, reflected light 704 It is blue, so that the device appears blue, and the function of the optical film is to make the blue color of the device more vivid. .

After discoloration: the mobile terminal electrifies the EC stack 200, and the EC stack turns black, so the incident light 600 cannot pass through the EC stack 201 and cannot reach the back layer, so the reflected light 700' is black.

The difference between embodiment 3 and embodiment 2 lies in: the difference of the bottom layer of glue, embodiment 2 adopts OCA optical glue and color base, embodiment 3 uses ink.

The common point between Embodiment 3 and Embodiment 2 is that the customization of the color mainly depends on the color base layer 404 or the color ink 405 , and the main function of the optical film layer 300 here is to increase the transmission effect.

The products of Examples 1, 2 and 3 are installed on the mobile phone/PAD, wherein the transparent substrate layer 100 is a transparent back cover glass for the mobile phone/PAD.

Example 4

As shown in Figure 7 and Figure 8, Figure 7 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 4 before discoloration, and Figure 8 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 4 after discoloration ; The electrochromic device of this embodiment is applied to building doors and windows (laminated glass), and the transparent color becomes black. The layered structure of the electrochromic device is successively: transparent substrate layer 100, EC stack 200, optical film layer 300, PVB Film 401 and another transparent substrate layer 406 .

Before discoloration: the EC stack 200 is not energized, so the incident light 600 can pass through the EC stack 200 and reach another transparent substrate layer 406. Before discoloration, the optical film layer 300 is customized as an anti-reflection and anti-reflection film (Table 7). The device appears transparent. In another embodiment, the optical film layer 300 is customized as a reflective color that matches the architectural art and color, such as the various colors realized by the film layer in Table 1 to Table 6.

After discoloration: electrify the EC stack 200, the EC stack turns black, so the incident light 600 cannot pass through the EC stack 201, and cannot reach the subsequent layers, so the reflected light 700' is black, and the other side is displayed when the optical film is designed to be anti-reflection A darker black, such as an optical film designed to reflect a custom color, shows a darker custom color that harmonizes with the surrounding environment.

Both the effect of deepening the color and the effect of reflecting the custom color. In this embodiment, there are two options for the optical film layer, one is anti-reflection, the effect is the original color or what color, but it will be clearer (it can be understood as deepening); the other is customized color, at this time there is color before the color change, However, due to the absorption of other light on the black base after discoloration, the reflected color is more obvious (it can be understood as deepening)

Example 5

As shown in Figure 7 and Figure 8, Figure 7 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 5 before discoloration, and Figure 8 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 5 after discoloration ; The electrochromic device of this embodiment is applied to building doors and windows (hollow glass), and the transparent color becomes black. The layered structure of the electrochromic device is as follows: transparent substrate layer 100, EC stack 200, optical film layer 300, hollow layer 407 and another transparent substrate layer 406.

Before discoloration: Do not energize the EC stack 200, so the incident light 600 can pass through the EC stack 200 and reach another transparent substrate layer 406. Before discoloration, the optical film layer 300 is customized as an anti-reflection and anti-reflection film, and the overall device appears transparent color. In another embodiment, the optical film layer 300 is customized as a reflective color that matches the architectural art and color, such as the various colors realized by the film layer in Table 1 to Table 6.

After discoloration: electrify the EC stack 200, the EC stack turns black, so the incident light 600 cannot pass through the EC stack 201, and cannot reach the subsequent layers, so the reflected light 700' is black, and the other side is displayed when the optical film is designed to be anti-reflection A darker black, such as an optical film designed to reflect a custom color, shows a darker custom color that harmonizes with the surrounding environment.

The difference between Embodiment 4 and Embodiment 5 lies in that: the hollow layer 407 is different from the PVB film 401 and is in indirect or direct contact with the transparent substrate layer 406 .

Example 6

As shown in Figures 9 and 10, Figure 9 is a schematic structural view of the electrochromic device whose color can be customized in Example 6 before discoloration, and Figure 10 is a schematic structural diagram of the electrochromic device whose color can be customized in Example 6 after discoloration , the electrochromic device of this embodiment is applied to home appliances (wine cabinet door glass), and the golden color becomes transparent. The layered structure of the electrochromic device is as follows: transparent substrate layer 100, optical film layer 300, EC stack 200, PVB board 401 and another transparent substrate layer 406 .

Table 8 Golden optical film layer film system scheme

The principle of discoloration: in the wine cabinet, the incident light passes through a part of the cabinet door and part of the reflection. When the wine cabinet is not in use, because the inside of the wine cabinet is dark under the cooperation of electrochromism, what you see is the reflected color, and the reflected color is made into The metal texture color is consistent with the cabinet body. If the wine cabinet is gold, the reflection color is gold. When the wine cabinet is activated, turn on the light 500 inside the wine cabinet, and the electrochromic color will completely fade at the same time, and the light in the wine cabinet can pass through the cabinet. door to see the wine inside.

Example 7

Figure 9 is a schematic structural diagram of the electrochromic device whose color can be customized in Example 7 before discoloration, and Figure 10 is a schematic structural diagram of the electrochromic device whose color can be customized in Example 7 after discoloration, the application of the electrochromic device in this embodiment For home appliances (refrigerator door glass), the silver color becomes transparent, and the layered structure of the electrochromic device is as follows: transparent substrate layer 100, optical film layer 300, EC stack 200, hollow layer 407 and another transparent substrate layer 406. The hollow layer 407 has the function of heat insulation.

Table 9 Silver optical film layer film system scheme

layers Material Thickness (nm) 1 cr 122

The principle of discoloration: In the refrigerator, the incident light passes through a part of the door and part of the reflection. When the refrigerator is not in use, because the inside of the refrigerator is dark under the cooperation of electrochromism, what is seen is the reflected color, which is made to match the cabinet. Consistent metal texture color, such as the refrigerator is silver, the reflection color is silver. When the refrigerator is activated, turn on the light 500 inside the refrigerator, and at the same time the electrochromic color will completely fade, and the light in the refrigerator can pass through the door, so that you can see thing.

Example 8

As shown in Figures 11 and 12, Figure 11 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 8 before discoloration; Figure 12 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 8 after discoloration; The electrochromic device of this embodiment is applied to the back cover of a mobile terminal (mobile phone), and various customized colors such as light yellow become light blue. The layered structure of the electrochromic device is as follows: a transparent substrate layer 100, an optical film layer 300 , EC stack 200 , OCA optical glue layer 403 and color base layer (not black) 404 .

Before discoloration: the mobile terminal does not power on the EC stack 200, so the incident light 600 can pass through the EC stack 200 and reach the color base layer 404. Before discoloration, the color base layer 404 is customized to be red, and the color base layer 404 reflects yellow light and absorbs visible light The light in all wavelength bands except the middle yellow light, that is, the reflected light 705 is yellow. After the reflected light is superimposed, the overall reflection 700 makes the device appear yellow.

After discoloration: the mobile terminal electrifies the EC stack 200, the EC stack turns black and absorbs light in all wavelength bands, so the incident light 600 cannot pass through the EC stack 201 and cannot reach the subsequent layers, while the optical film layer 300 reflects Blue light, so the reflected light 700' appears blue. Change from red to blue.

Example 9

As shown in Figures 13 and 14, Figure 13 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 9 before discoloration; Figure 14 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 9 after discoloration; The electrochromic device of this embodiment is applied to the back cover of a mobile terminal (mobile phone), and various customized colors such as light blue become black. The layered structure of the electrochromic device is as follows: a transparent substrate layer 100, an optical film layer 300, EC stack 200 and ink 405 .

Before discoloration: the mobile terminal does not energize the EC stack 200, so the incident light 600 can pass through the EC stack 200 and reach the ink layer 405. Before discoloration, the ink layer is customized to be red, reflecting red light, and absorbing all visible light except red light The light in the wavelength band, that is, the reflected light 705 is red, and after the reflected light is superimposed, the overall reflective light 700 makes the device appear red.

After discoloration: the mobile terminal electrifies the EC stack 200, the EC stack turns black and absorbs light in all wavelength bands, so the incident light 600 cannot pass through the EC stack 201 and cannot reach the subsequent layers, while the optical film layer 300 reflects Blue light, so the reflected light 700' appears blue. Change from red to blue.

Example 10

As shown in Figures 15 and 16, Figure 15 is a schematic structural view of the electrochromic device whose color can be arbitrarily customized in Example 10 before discoloration; Figure 16 is a schematic structural diagram of the electrochromic device whose color can be arbitrarily customized in Example 10 after discoloration; In the device manufacturing process, the optical film layer 300 is deposited on the transparent substrate layer 100 , the EC stack 200 is deposited on the color base layer 404 , and the optical film layer 300 and the EC stack 200 are bonded together using the OCA optical adhesive layer 403 . The electrochromic device of this embodiment is applied to the back cover of a mobile terminal (mobile phone), and various customized colors such as light blue become black. The layered structure of the electrochromic device is as follows: a transparent substrate layer 100, an optical film layer 300, OCA optical glue layer 403 , EC stack 200 and color base layer (not black) 404 .

Before discoloration: the mobile terminal does not energize the EC stack 200, so the incident light 600 can pass through the EC stack 200 and reach the color base layer (non-black) 404. Before discoloration, the color base layer is customized to be red, reflecting red light and absorbing visible light The light of all wavelength bands except red light, that is, the reflected light 705 is red, and the overall reflection 700 after the reflected light is superimposed makes the device appear red.

After discoloration: the mobile terminal electrifies the EC stack 200, the EC stack turns black and absorbs light in all wavelength bands, so the incident light 600 cannot pass through the EC stack 201 and cannot reach the subsequent layers, while the optical film layer 300 reflects Blue light, so the reflected light 700' appears blue. Change from red to blue.

The above content is a further detailed description of the technical solutions provided in conjunction with preferred embodiments of the present invention. It cannot be determined that the specific implementation of the present invention is only limited to the above descriptions. For those of ordinary skill in the technical field of the present invention, without departing Under the premise of the concept of the present invention, some simple deduction or replacement can also be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (9)

1. An electrochromic device whose color can be customized arbitrarily, comprising a transparent substrate layer and an EC stack, is characterized in that: it also includes an optical film layer and/or a bottom layer of glue; the bottom layer of glue is covered on the transparent substrate layer, The optical film layer and the EC stack are sequentially arranged in the subbing layer; or, the optical film layer is covered on the transparent substrate layer, the subbing layer is covered on the optical film layer, and the EC stacking layer is covered on the optical film layer and the transparent substrate layer. Between the substrate layers or between the optical film layer and the subbing layer or in the subbing layer. 2. The electrochromic device whose color can be customized arbitrarily as claimed in claim 1, is characterized in that: the adhesive bottom layer comprises a transparent adhesive layer as an inner layer, and is covered on the transparent adhesive layer as an outer layer. The color base layer/another transparent substrate layer of the layer; or the adhesive base layer includes an ink layer only as an outer layer; or the adhesive base layer includes a hollow layer as an inner layer, and covers the hollow layer as an outer layer. Layer another transparent substrate layer. 3. An electrochromic device whose color can be customized arbitrarily as claimed in claim 2, characterized in that: said transparent adhesive layer adopts film or glue, said film adopts PVB or a film with similar functions, said The glue adopts OCA or optical glue with similar functions; the color base layer adopts PET or materials with similar functions, and the color can be customized according to needs, and the ink adopts glossy two-component solvent-based ink for glass or other color inks. 4. The electrochromic device whose color can be customized arbitrarily as claimed in claim 1, characterized in that: said optical film layer is made of high refractive index material and low refractive index material through evaporation, sputtering, ion plating One or several coating methods are alternately deposited. 5. An electrochromic device with customizable color as claimed in claim 4, characterized in that: titanium oxide or niobium oxide and silicon oxide are used for the high refractive index material and low refractive index material respectively. 6 . An electrochromic device with customizable color as claimed in claim 1 , characterized in that: the optical film layer is adjusted to the required reflection or transmission spectrum through spectrum to realize color customization. 7 . 7. An electrochromic device with customizable colors as claimed in claim 1, characterized in that: said transparent substrate layer is made of glass or transparent resin material. 8. An electrochromic device with freely customizable colors as claimed in claim 2, characterized in that: the hollow layer is made of hollow glass. 9. An application of an electrochromic device whose color can be customized arbitrarily, characterized in that it is applied to mobile terminals, building doors and windows, and home appliances.