Electrochromic display device

Abstract

This application provides an electrochromic display device, comprising: a substrate; a thin-film transistor array circuit layer formed on the substrate; a transparent electrode layer formed on and electrically connected to the thin-film transistor array circuit layer; an electrochromic layer formed on the transparent electrode layer; an electrolyte layer formed on the electrochromic layer; an ion storage layer formed on the electrolyte layer; and a transparent counter electrode layer formed on the ion storage layer. The ion storage layer is made of an electrochromic material and can switch between a transparent state and a black state under voltage control. The electrochromic polarity of the ion storage layer is the same as that of the electrochromic layer. The electrochromic display device provided by this application improves the problem of color gamut reduction caused by incident light mixing in emitted light during monochrome display.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to an electrochromic display device. Background Technology

[0002] Traditional electrochromic (EC) display devices, from top to bottom, consist of a transparent working electrode layer, a thin-film transistor array circuit layer, an electrochromic layer, an electrolyte layer, an ion storage layer, and a transparent counter electrode layer. The display unit of the electrochromic layer comprises RGB pixels with different shapes and arrangements. The grayscale changes of the RGB pixels are triggered by the varying absorption and transmission characteristics of the electrochromic material under an electric field, causing these pixels to combine and change, thus displaying the image. However, because each color pixel can only change from transparent to a single color, when the electrochromic display device displays a single color image, other color pixels are transparent. For example, in a transmissive or reflective electrochromic display device displaying a red image, the red EC pixel is displayed, while the green and blue pixels fade to transparent. The emitted light consists of 1 / 3 narrow-band red light and 2 / 3 wide-band background light, significantly reducing the red color saturation and thus decreasing the device's color gamut. The same applies when displaying other monochrome colors; two-thirds of the other incident light will be mixed in. When displaying other colors, because some pixel units cannot effectively block the incident light, the final displayed color will be mixed with the color of the incident light. Summary of the Invention

[0003] In view of this, this application provides an electrochromic display device that can improve the color gamut reduction problem caused by incident light mixing into the emitted light during monochrome display.

[0004] To solve the above problems, the technical solution provided in this application is as follows:

[0005] In a first aspect, this application provides an electrochromic display device, comprising:

[0006] Base;

[0007] A thin-film transistor array circuit layer is formed on the substrate;

[0008] A transparent electrode layer is formed on the thin-film transistor array circuit layer and electrically connected to the thin-film transistor array circuit layer;

[0009] An electrochromic layer is formed on the transparent electrode layer;

[0010] An electrolyte layer is formed on the electrochromic layer;

[0011] An ion storage layer is formed on the electrolyte layer; and

[0012] A transparent counter electrode layer is formed on the ion storage layer;

[0013] The ion storage layer is made of an electrochromic material, and the ion storage layer can switch between a transparent state and a black state under voltage control. The electrochromic polarity of the ion storage layer is the same as that of the electrochromic layer.

[0014] In an optional embodiment of this application, the transparent electrode layer includes a plurality of transparent electrodes spaced apart, and the electrochromic layer includes a plurality of first electrochromic blocks spaced apart, with one first electrochromic block formed on one of the transparent electrodes;

[0015] When at least a portion of the first electrochromic block is colored, the portion of the ion storage layer opposite to the colored first electrochromic block is in a transparent state, and the portion of the ion storage layer opposite to the uncolored first electrochromic block is in a black state.

[0016] In an optional embodiment of this application, the ion storage layer is a continuous electrochromic film layer.

[0017] In an optional embodiment of this application, the ion storage layer includes a plurality of second electrochromic blocks, and one second electrochromic block corresponds to one first electrochromic block.

[0018] In an optional embodiment of this application, when at least a portion of the first electrochromic block is colored, one or more second electrochromic blocks opposite to the colored first electrochromic block are in a transparent state, and one or more second electrochromic blocks opposite to the uncolored first electrochromic block are in a black state.

[0019] In an optional embodiment of this application, the electrochromic material of the ion storage layer is selected from one or more of triazine derivatives, transition metal oxides, bipyridine analogs and their derivatives, conjugated polymer analogs and their derivatives, and copolymers of several of them.

[0020] In an optional embodiment of this application, the molecular structural formula of the electrochromic material of the ion storage layer is:

[0021] R1, R2, and R3 are conjugated polymer groups that can display red, green, and blue colors, respectively.

[0022] In an optional embodiment of this application, the molecular structural formula of the electrochromic material of the ion storage layer is:

[0023]

[0024] In an optional embodiment of this application, the electrochromic display device is a transmissive or reflective electrochromic display device.

[0025] In an optional embodiment of this application, the color gamut range of the electrochromic display device is 2% NTSC-20% NTSC; the transmittance range of the electrochromic material of the ion storage layer when it is in the transparent state is 80%-95%, and the transmittance range of the electrochromic material of the ion storage layer when it is in the black state is 5%-10%.

[0026] The electrochromic display device provided in this application uses a film layer formed of electrochromic material as an ion storage layer, and makes the electrochromic polarity of the ion storage layer the same as that of the electrochromic layer. Therefore, under the influence of the electric field formed between the transparent counter electrode layer and the transparent electrode layer, the ion storage layer opposite the position of the first electrochromic block that displays color is in a transparent state, while the ion storage layer opposite the position of the first electrochromic block that does not display color is in a black state. Thus, when the electrochromic display device is to achieve monochrome display, the monochrome emitted light that displays color can pass through the transparent ion storage layer and be emitted normally; while the incident light opposite the position of the first electrochromic block that does not display color can be effectively blocked by the black ion storage layer. This avoids the color of the incident light from mixing into the final displayed color, thereby improving the color gamut reduction problem caused by the mixing of incident light into the emitted light during monochrome display and effectively improving the color gamut of the electrochromic display device. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of an electrochromic display device provided in the first embodiment of this application.

[0029] Figure 2 for Figure 1 The cross-sectional view shown is of the electrochromic display device in its fully lit state.

[0030] Figure 3 for Figure 1 The cross-sectional view of the electrochromic display device shown is in a completely dark state.

[0031] Figure 4 for Figure 1 The cross-sectional view shown is of the electrochromic display device in monochrome display mode.

[0032] Figure 5 This is a cross-sectional view of an electrochromic display device provided in the second embodiment of this application.

[0033] Figure 6 This is a cross-sectional view of an electrochromic display device provided in the third embodiment of this application.

[0034] Figure 7 This is a color gamut diagram of electrochromic display devices in the prior art.

[0035] Figure 8 Color gamut diagram of the electrochromic display device provided in this application.

[0036] Figure 9 This is a plan view of a display terminal provided in this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] In the description of this application, it should be understood that the terms "upper," "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] Reference numerals and / or reference letters may be repeated in different embodiments of this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various implementations and / or settings discussed.

[0040] The electrochromic display device and display terminal provided in this application will be described in detail below with reference to specific embodiments and accompanying drawings.

[0041] Please see Figure 1-4The first embodiment of this application provides an electrochromic display device 100, which is a transmissive electrochromic display device. The electrochromic display device 100 includes a substrate 10, a thin-film transistor array circuit layer 20, a transparent electrode layer 30, an electrochromic layer 40, an electrolyte layer 50, an ion storage layer 60, and a transparent counter electrode layer 70, all stacked sequentially. Specifically, the thin-film transistor array circuit layer 20 is formed on the substrate 10, the transparent electrode layer 30 is formed on and electrically connected to the thin-film transistor array circuit layer 20, the electrochromic layer 40 is formed on the transparent electrode layer 30, the electrolyte layer 50 is formed on the electrochromic layer 40, the ion storage layer 60 is formed on the electrolyte layer 50, and the transparent counter electrode layer 70 is formed on the ion storage layer 60. The ion storage layer 60 is made of an electrochromic material. The ion storage layer 60 can switch between a transparent state and a black state under voltage control. The electrochromic polarity of the ion storage layer 60 is the same as that of the electrochromic layer 40.

[0042] In an optional embodiment of this application, the color gamut range of the electrochromic display device 100 is 2% NTSC-20% NTSC.

[0043] The substrate 10 may be formed of glass or a polymer. For example, it may be formed of glass, acrylic, polycarbonate (PC), polyethylene terephthalate (PET), or glass fiber. For example, to improve the performance of the electrochromic display device 100 and allow the electrochromic color to better transmit through the substrate 10, the substrate 10 may be formed of a material with a light transmittance greater than 90%.

[0044] The thin-film transistor array circuit layer 20 includes a plurality of driving transistors (not shown), which are spaced apart on the substrate 10.

[0045] The transparent electrode layer 30 includes a plurality of transparent electrodes 31 spaced apart, and one of the transparent electrodes 31 is electrically connected to one of the driving transistors to apply a voltage to the corresponding transparent electrode 31 through the driving transistor.

[0046] The transparent electrode layer 30 and the transparent counter electrode layer 70 can be made of materials with good conductivity and high transparency, such as indium tin oxide (ITO) or nano-silver. The good conductivity of the transparent electrode layer 30 and the transparent counter electrode layer 70 can reduce energy consumption when using the electrochromic function. Furthermore, the high transparency of the transparent electrode layer 30 and the transparent counter electrode layer 70 can better display the color produced by the electrochromic layer 40.

[0047] The electrochromic layer 40 can be an organic electrochromic layer, which exhibits a variety of colors and has high timeliness. In an optional embodiment of this application, the thickness of the electrochromic layer 40 is not particularly limited, and those skilled in the art can select it according to actual needs.

[0048] The electrochromic layer 40 can be formed by physical vapor deposition, electropolymerization, thermal polymerization, photopolymerization, direct growth, or other methods. Alternatively, the electrochromic layer 40 can be formed by dissolving the polymerized electrochromic material in a specific solvent and then coating it onto the transparent electrode layer 30 using methods including, but not limited to, spraying or roller coating. The thickness of the electrochromic layer 40 can be controlled by adjusting the polymerization parameters and the thickness of the coated material.

[0049] The electrochromic layer 40 includes a plurality of spaced-apart first electrochromic blocks, one of which is formed on a transparent electrode 31.

[0050] Specifically, the plurality of first electrochromic blocks include a first first electrochromic block 41, a second first electrochromic block 42, and a third first electrochromic block 43, and one first first electrochromic block 41, one second first electrochromic block 42, and one third first electrochromic block 43 constitute a pixel unit. In this embodiment, the first first electrochromic block 41 is a red first electrochromic block, the second first electrochromic block 42 is a green first electrochromic block, and the third first electrochromic block 43 is a blue first electrochromic block. Of course, in other embodiments, the first electrochromic block may also include a fourth first electrochromic block, etc., and is not limited to the first first electrochromic block 41, the second first electrochromic block 42, and the third first electrochromic block 43.

[0051] The materials of the electrochromic layer 40 and the electrochromic material of the ion storage layer 60 can be either cathode color-changing materials or anode color-changing materials. Cathode color-changing materials are electrochromic materials that show color when a negative voltage is applied, while anode color-changing materials are electrochromic materials that show color when a positive voltage is applied.

[0052] The fact that the electrochromic polarity of the ion storage layer 60 is the same as that of the electrochromic layer means that the electrochromic material of the ion storage layer 60 and the electrochromic material of the electrochromic layer 40 can both be cathode color-developing materials or both be anode color-developing materials.

[0053] If the electrochromic material of the ion storage layer 60 has the opposite color polarity to the electrochromic material of the electrochromic layer 40, that is, the material of the electrochromic layer 40 exhibits positive voltage color development (i.e., it is an anode color development material), and the electrochromic material of the ion storage layer 60 exhibits negative voltage color development (i.e., it is a cathode color development material), then when the transparent electrode layer 30 corresponding to the electrochromic layer 40 is the positive electrode and the transparent counter electrode layer corresponding to the ion storage layer 60 is the negative electrode, a positive voltage is applied to the circuit. The electrochromic layer 40 receives a positive voltage, and the ion storage... The electrochromic material of layer 60 receives a negative pressure. The electrochromic material of the ion storage layer 60 and the electrochromic material of the electrochromic layer 40 develop color simultaneously, which will seriously interfere with the final displayed pattern. If the color polarity of the electrochromic material of the ion storage layer 60 and the electrochromic material of the electrochromic layer 40 is the same, then when the electrochromic layer 40 develops color, the electrochromic material of the ion storage layer 60 fades. This way, the normal display effect of the device will not be interfered with, and the function of blocking color development in non-display pixel areas will be achieved.

[0054] The electrochromic material of the electrochromic layer 40 and the ion storage layer 60 can be a triazine derivative, or it can be one or more of other types of transition metal oxides, bipyridine analogs and their derivatives, conjugated polymer analogs and derivatives (derivatives, derivatives and analogs of monomers such as aniline, pyrrole, pyridine, anthraquinone, styrene, pyran, oxazine, thiophene, thioran, triphenylamine, pyrazoline, phenazine, phenothiazine, etc.), as well as copolymers of several of these. The transition metal oxide can be: tungsten oxynitride, molybdenum oxynitride, niobium oxynitride, titanium oxynitride, tantalum oxynitride, nickel oxynitride, iridium oxynitride, manganese oxynitride, cobalt oxynitride, tungsten nickel oxynitride, tungsten iridium oxynitride, tungsten manganese oxynitride, tungsten cobalt oxynitride, etc. The electrochromic material of the electrochromic layer 40 and the ion storage layer 60 can change from a transparent state to a black state or from a black state to a transparent state under different voltages.

[0055] In an optional embodiment of this application, the transmittance of the electrochromic material of the ion storage layer 60 in the transparent state is in the range of 80%-95%, and the transmittance of the electrochromic material of the ion storage layer 60 in the black state is in the range of 5%-10%.

[0056] Preferably, the molecular structure of the electrochromic material (triazine derivative) of the ion storage layer 60 is as follows:

[0057]

[0058] R1, R2, and R3 are conjugated polymer groups that can display red, green, and blue colors, or conjugated polymer groups that can display blue and green colors, to achieve absorption across the entire wavelength range.

[0059] Specifically, the molecular structure of the electrochromic material (triazine derivative) of the ion storage layer 60 is as follows:

[0060]

[0061] in, The group itself can show green color. The group itself can show a blue color.

[0062] In this embodiment, the ion storage layer 60 is a continuous electrochromic film layer, that is, the ion storage layer 60 does not have pores, holes, grooves, gaps, etc.

[0063] In this configuration, one of the transparent electrode layer 30 and the transparent counter electrode layer 70 is connected to a positive voltage, and the other is connected to a negative voltage.

[0064] Specifically, when the transparent electrode layer 30 is connected to a positive voltage, the transparent counter electrode layer 70 is connected to a negative voltage, and the electrochromic material of the electrochromic layer 40 and the ion storage layer 60 is a cathode color-developing material, the electrochromic layer 40 does not develop color, and the ion storage layer 60 develops color.

[0065] Specifically, when the transparent electrode layer 30 is connected to a negative voltage, the transparent counter electrode layer 70 is connected to a positive voltage, and the electrochromic material of the electrochromic layer 40 and the ion storage layer 60 is a cathode color-developing material, the electrochromic layer 40 develops color, while the ion storage layer 60 does not develop color.

[0066] Specifically, when the transparent electrode layer 30 is connected to a positive voltage, the transparent counter electrode layer 70 is connected to a negative voltage, and the electrochromic materials of the electrochromic layer 40 and the ion storage layer 60 are anodic color-developing materials, the electrochromic layer 40 develops color, while the ion storage layer 60 does not develop color.

[0067] Specifically, when the transparent electrode layer 30 is connected to a negative voltage, the transparent counter electrode layer 70 is connected to a positive voltage, and the electrochromic materials of the electrochromic layer 40 and the ion storage layer 60 are anodic color-developing materials, the electrochromic layer 40 does not develop color, and the ion storage layer 60 develops color.

[0068] Please see Figure 2-4When at least a portion of the first electrochromic block is colored, the portion of the ion storage layer 60 opposite to the colored first electrochromic block is in a transparent state, and the portion of the ion storage layer 60 opposite to the uncolored first electrochromic block is in a black state. Specifically, ON indicates that the first electrochromic block is lit, OFF indicates that the first electrochromic block is not lit, WS indicates that the ion storage layer 60 is in a transparent state, and BS indicates that the ion storage layer 60 is in a black state.

[0069] Specifically, please refer to Figure 2 The first electrochromic blocks of the electrochromic layer 40 are all lit up (all show color), and correspondingly, the ion storage layer 60 is in a transparent state.

[0070] Specifically, please refer to Figure 3 The first electrochromic blocks of the electrochromic layer 40 were not lit up (none showed color), and correspondingly, the ion storage layer 60 was in a black state.

[0071] Specifically, please refer to Figure 4 The first electrochromic block 41 (e.g., red first electrochromic block) of the electrochromic layer 40 is lit (both display color), while the second electrochromic block 42 (e.g., green first electrochromic block) and the third electrochromic block 43 (e.g., blue first electrochromic block) of the electrochromic layer 40 are not lit (none display color). Correspondingly, the ion storage layer 60 opposite to the position of the first electrochromic block 41 is in a transparent state (i.e., WS state), and the ion storage layer 60 opposite to the positions of the second electrochromic block 42 and the third electrochromic block 43 is in a black state (i.e., BS state).

[0072] The electrolyte layer 50 can be an inorganic system, a gel system, or a solution system. Specifically, taking an inorganic system as an example, the electrolyte layer 50 can be tantalum oxide (TaO). x Metal oxides such as lithium tantalate (LiTaO) are lithiated to form lithium salts. x ).

[0073] The electrochromic display device 100 is a transmissive or reflective electrochromic display device.

[0074] Please see Figure 5The second embodiment of this application provides an electrochromic display device 200, which is structurally similar to the electrochromic display device 100. The difference lies in that the ion storage layer 60 of the electrochromic display device 200 includes a plurality of second electrochromic blocks 61, with each second electrochromic block 61 corresponding to one first electrochromic block. This one-to-one correspondence between the second electrochromic blocks 61 and the first electrochromic blocks saves on the amount of electrochromic material used and reduces costs.

[0075] When at least part of the first electrochromic block is colored, the second electrochromic block 61, which is opposite to the colored first electrochromic block, is in a transparent state, and the second electrochromic block 61, which is opposite to the uncolored first electrochromic block, is in a black state.

[0076] Please see Figure 6 The second embodiment of this application provides an electrochromic display device 300, which is structurally similar to the electrochromic display device 200. The difference is that the electrochromic display device 300 is a reflective electrochromic display device. The electrochromic display device 300 also includes a reflective film 80, which is formed on the side of the substrate 10 away from the thin film transistor array circuit layer 20, or between the substrate 10 and the thin film transistor array circuit layer 20, or between the thin film transistor array circuit layer 20 and the transparent electrode layer 30.

[0077] Please see Figure 7-8 , Figure 7 This is a color gamut diagram of existing electrochromic display devices. Figure 8 The color gamut diagram of the electrochromic display device provided in this application, wherein, Figure 7 and Figure 8 The color gamut diagram in this example is based on data simulation of the light path and emitted light color. Assuming the color gamut of the three-color RGB material in the electrochromic layer is 17% NTSC, the 1931 CIExy color gamut space is simulated for electrochromic display devices before and after using the aforementioned electrochromic material as the ion storage layer. It should be noted that if the RGB material used has a larger color gamut, the final display device will also have a larger color gamut. The theoretical maximum color gamut of existing RGB materials is 60% NTSC, which explains the 2-20% color gamut range of the devices. Here, only some 17% NTSC RGB materials are used for simulation. The large triangles represent the standard color gamut space, and the small triangles represent the actual color gamut space. For example... Figure 7 As shown, the color gamut of the electrochromic device without using the electrochromic material described above as the ion storage layer is 0.3% NTSC. Figure 8As shown, the color gamut of the electrochromic device using the electrochromic material described above as the ion storage layer is 2.7% NTSC. That is, the color gamut of the electrochromic device using the electrochromic material described above as the ion storage layer is significantly larger than that of the electrochromic device not using the electrochromic material described above as the ion storage layer. In other words, using the electrochromic material described above as the ion storage layer can effectively improve the color gamut of the electrochromic display device.

[0078] Please see Figure 9 This application also provides a display terminal 1000, which includes a body 1100 and an electrochromic display device 100, 200, or 300 as described above. The electrochromic display device 100, 200, or 300 is fixed to the body 1100. The body 1100 may be a frame or similar device for fixing the electrochromic display device 100, 200, or 300. The display terminal 1000 may be a computer, a display screen, or the like.

[0079] The electrochromic display device provided in this application uses a film layer formed of electrochromic material as an ion storage layer, and makes the electrochromic polarity of the ion storage layer the same as that of the electrochromic layer. Therefore, under the influence of the electric field formed between the transparent counter electrode layer and the transparent electrode layer, the ion storage layer opposite the position of the first electrochromic block that displays color is in a transparent state, while the ion storage layer opposite the position of the first electrochromic block that does not display color is in a black state. Thus, when the electrochromic display device is to achieve monochrome display, the monochrome emitted light that displays color can pass through the transparent ion storage layer and be emitted normally; while the incident light opposite the position of the first electrochromic block that does not display color can be effectively blocked by the black ion storage layer. This avoids the color of the incident light from mixing into the final displayed color, thereby improving the color gamut reduction problem caused by the mixing of incident light into the emitted light during monochrome display and effectively improving the color gamut of the electrochromic display device.

[0080] In summary, although the present application has disclosed the preferred embodiments as described above, the above preferred embodiments are not intended to limit the present application. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be determined by the scope defined in the claims.

Claims

1. An electrochromic display device, characterized by The electrochromic display device comprises: a substrate; a thin film transistor array circuit layer formed on the substrate; a transparent electrode layer formed on the thin film transistor array circuit layer and electrically connected with the thin film transistor array circuit layer, and comprising a plurality of transparent electrodes arranged at intervals; an electrochromic layer formed on the transparent electrode layer, and comprising a plurality of first electrochromic blocks, one of which is formed on one of the transparent electrodes; an electrolyte layer formed on the electrochromic layer; an ion storage layer formed on the electrolyte layer; and a transparent counter electrode layer formed on the ion storage layer; wherein the ion storage layer is made of electrochromic material, and can be switched between transparent state and black state under voltage control, and the electrochromic polarity of the ion storage layer is the same as that of the electrochromic layer.

2. The electrochromic display device according to claim 1, wherein When the first electrochromic blocks develop color, the ion storage layer opposite the position of the developed first electrochromic blocks is in transparent state, and the ion storage layer opposite the position of the undeveloped first electrochromic blocks is in black state.

3. An electrochromic display device as claimed in claim 1 or 2, characterized in that The ion storage layer is a continuous electrochromic film layer.

4. An electrochromic display device as claimed in claim 1 or 2, characterized in that The ion storage layer comprises a plurality of second electrochromic blocks, one of which corresponds to one of the first electrochromic blocks.

5. The electrochromic display device according to claim 4, wherein When at least part of the first electrochromic blocks develop color, the second electrochromic blocks opposite the position of the developed first electrochromic blocks are in transparent state, and the second electrochromic blocks opposite the position of the undeveloped first electrochromic blocks are in black state.

6. The electrochromic display device of claim 1, wherein The electrochromic material of the ion storage layer is selected from one or several of triazine derivatives, transition metal oxides, bipyridine analogues and derivatives thereof, conjugated polymer analogues and derivatives, and copolymers of several thereof.

7. The electrochromic display device according to claim 6, wherein The molecular structure formula of the electrochromic material of the ion storage layer is: wherein R1, R2, R3 are respectively a conjugated polymer group capable of showing red, green, blue color, or a conjugated polymer group capable of showing blue and green color.

8. Electrochromic display device according to claim 7, characterized in that The molecular structure formula of the electrochromic material of the ion storage layer is: 。 9. The electrochromic display device of claim 1, wherein, The electrochromic display device is a transmissive or reflective electrochromic display device.

10. The electrochromic display device of claim 1, wherein The color gamut range of the electrochromic display device is 2% NTSC-20% NTSC; the transmittance range of the electrochromic material of the ion storage layer in transparent state is 80%-95%, and the transmittance range of the electrochromic material of the ion storage layer in black state is 5%-10%.

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