CN211928362U - Electrochromic display panel and electronic paper - Google Patents

Abstract

The utility model relates to an electrochromic display panel and electronic paper. The electrochromic display panel comprises a printing substrate layer, a printing ink layer, a light-transmitting layer, an electrochromic pixel array and a substrate layer, which are arranged in sequence. On the printing substrate layer, the electrochromic pixel array includes a first transparent electrode, a black electrochromic layer and a second transparent electrode sequentially arranged on the light-transmitting layer, and the black electrochromic layer includes a plurality of electrochromic black sub-pixel units, When the power is turned on, the black electrochromic layer becomes pure black, and when the power is off, the black electrochromic layer is transparent; the printing ink layer includes a plurality of CMY color ink dots, and the electrochromic display panel is displayed through the printing ink layer. Various colors other than pure black; the first transparent electrode has a first opposite surface opposite to the second transparent electrode, the second transparent electrode has a second opposite surface opposite to the first transparent electrode, the first opposite surface and/or the second Micro-nano structures are arranged on the two opposite surfaces.

Description

Electrochromic display panel and electronic paper

technical field

The utility model relates to an electrochromic display panel and electronic paper, belonging to the technical field of display.

Background technique

The current display technology can be divided into two categories: one is paper display, which is mainly characterized by: displaying content by reflecting ambient light, easy to display in color, large viewing angle (close to 180°), and soft media. The other type is CRT, LCD, LED and other electronic displays. Its main features are: information can be refreshed quickly, and the content is displayed by relying on the internal light of the display itself. It consumes a lot of power during work, it is easy to make people tired when reading, and the medium is not soft. . Electrochromism (EC) refers to the phenomenon in which the optical properties (reflectivity, transmittance, absorption, etc.) of materials undergo stable and reversible color changes under the action of an external electric field, which is manifested as color and transparency in appearance. reversible change. Materials with electrochromic properties are called electrochromic materials, and devices made of electrochromic materials are called electrochromic devices. Electrochromic materials are one of the hotspots in material science research in recent years. Electrochromic materials are an important part of electrochromic devices and dominate the electrochromic properties of the devices. According to the structural properties of materials, electrochromic materials can be divided into anodic electrochromic materials (ion intercalation coloring) and cathodic electrochromic materials (ion extraction coloring). The anodic electrochromic material and the cathodic electrochromic material can be assembled into complementary electrochromic devices, and such complementary devices can improve the overall electrochromic performance, such as optical contrast, color change, spectral absorption range, etc. Currently, the existing electrochromic display panels have the following problems:

1 Theoretically speaking, it only needs to mix the three inks of CMY in equal proportions to get black. However, due to the limitation of the current manufacturing technology, the purity of the produced ink is not high enough, and the result of adding CMY is actually only a dark color. red;

2) The non-uniformity of the applied electric field is large, which affects the dielectric strength of the dielectric; under the same other conditions, the more non-uniform the electric field, the lower the dielectric strength of the dielectric, and it is easy for other materials to contact the dielectric layer and cause corrosion. reaction.

Utility model content

The purpose of the present invention is to provide an electrochromic display panel and electronic paper, which can display both black and other colors, and the electric field distribution between the transparent electrodes is uniform, and has a better display effect.

In order to achieve the above purpose, the present invention provides the following technical solutions: an electrochromic display panel, comprising a first substrate, an electrochromic pixel array and a second substrate arranged in sequence, and the electrochromic pixel array includes several array rows cloth, an independently controlled electrochromic unit, the electrochromic unit includes a black structure layer and a color structure layer, the black structure layer includes a first electrode and a black electrochromic pixel layer disposed on the first substrate and a second electrode, the color structure layer includes a plurality of cyan structural units (C), yellow structural units (Y) and magenta structural units (M) arranged in a vertical stack, the color structure layer is arranged on the black structure layer side; the first electrode has a first opposite surface opposite to the second electrode, the second electrode has a second opposite surface opposite to the first electrode, the first opposite surface and/ Or the second opposite surface is provided with several micro-nano structures.

Further, the structural unit includes two electrodes disposed opposite to each other, and an ion storage layer, a conductive layer, and a C or Y or M electrochromic pixel layer disposed between the two electrodes and disposed in sequence.

Further, the micro-nano structure is provided on the electrode.

Further, the micro-nano structure is a concave-convex groove structure.

Further, the widths of the grooves of the concave-convex groove structure are the same or different; the depths of the grooves are the same or different; the shape of the grooves is a rectangle, a trapezoid, or an arc.

Further, the micro-nano structures are distributed periodically or aperiodically.

Further, the electrochromic display panel further includes a white reflective layer disposed between the first substrate and the electrochromic pixel array.

Further, the electrochromic display panel further includes an adhesive layer, and the adhesive layer is arranged between the white reflective layer and the electrochromic pixel array, and the electrochromic pixel array passes through the adhesive layer. adhered to the white reflective layer.

Further, the white reflective layer is formed of adhesive polymer resin and white particles, and the electrochromic pixel array is adhered on the white reflective layer.

Further, the black structure layer further includes a first ion storage layer and a first conductive layer which are stacked in sequence and disposed between the first electrode and the black electrochromic pixel layer.

Further, the one ion storage layer and the first conductive layer are solid-state structures.

Further, an electrochromic material is provided in the black electrochromic pixel layer, and the electrochromic material is selected from any of organic electrochromic materials, inorganic electrochromic materials or composite electrochromic materials .

Further, the C, Y, M electrochromic pixel layers are provided with electrochromic materials, and the electrochromic materials are selected from organic electrochromic materials, inorganic electrochromic materials or composite electrochromic materials. any of the.

Further, the organic electrochromic material is preferably any of viologens, isophthalates, metal phthalocyanines, pyridine metal complexes, polyanilines, polypyrroles, and polythiophenes. one or more.

The present invention also provides an electronic paper, which includes the above-mentioned electrochromic display panel.

Compared with the prior art, the beneficial effect of the present invention is that the electrochromic display panel and the electronic paper of the present invention are provided with an electrochromic pixel array between the first substrate and the second substrate, and the electrochromic pixel array is arranged between the first substrate and the second substrate. A black structure layer and a color structure layer are arranged in the array. When powered on, the black electrochromic layer turns black, and when powered off, the black electrochromic layer is transparent; the electrochromic display panel and electronic paper display various colors except black through the color structure layer. In addition, by arranging micro-nano structures on the first electrode and/or the second electrode in the electrochromic pixel array, the contact area can be increased, so that it has better electrochemical performance, and the electric field between the two electrodes can be improved. The distribution of the ions is more uniform, thereby enhancing its conductive effect and response speed, and its structure is simple and easy to prepare.

In the electrochromic display panel and electronic paper, the electrochromic pixel array is fixed on the white reflective layer in an adhesive manner, which not only ensures the stability and flatness of the structure, but also avoids or reduces Newton's rings, which are unfavorable for display. The phenomenon of the effect is produced and the quality of the product is improved.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, and to implement it according to the contents of the description, the following describes in detail with the preferred embodiments of the present invention and the accompanying drawings as follows: back.

Description of drawings

1 is a top view of an electrochromic display panel shown in the present invention;

2a and 2b are schematic diagrams of two structures of the electrochromic display panel shown in the present invention;

3 and 4 are schematic structural diagrams of micro-nano structures in the electrochromic display panel according to the present invention;

5 and 6 are schematic diagrams of other two structures in the electrochromic display panel shown in the present invention;

7 is a schematic structural diagram of the electrochromic display panel according to the first embodiment of the present invention;

8 is a schematic structural diagram of an electrochromic unit in the electrochromic display panel shown in FIG. 7;

9 is a schematic structural diagram of the electrochromic display panel shown in Embodiment 2 of the present invention;

FIG. 10 is a schematic structural diagram of the black structure layer in the electrochromic display panel shown in FIG. 9 .

Detailed ways

The specific embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

It should be noted that the terms "up", "down", "left", "right", "inside" and "outer" of the present invention are only used to describe the present invention with reference to the accompanying drawings, and are not used as limiting terms.

Referring to FIG. 1 and FIG. 2a, in the vertical direction 10, the electrochromic display panel shown in the present invention includes a first substrate 1, an electrochromic pixel array 3 and a second substrate 4 arranged in sequence from bottom to top , the electrochromic pixel array 3 includes a plurality of arrays arranged, independently controlled electrochromic units 30, the electrochromic unit 30 includes a black structure layer 31 and a color structure layer 32, the black structure layer 31 in the vertical direction 10 includes sequentially The first electrode 311 , the black electrochromic pixel layer (K) 312 and the second electrode 313 are provided on the first substrate 1 . When the power is turned on, the black structure layer 31 turns black, and when the power is turned off, the black structure layer 31 is transparent. In order to present a color image, the color structure layer 32 includes a plurality of cyan structural units 321 , magenta structural units 322 and yellow structural units 323 that are vertically stacked and arranged. The order of each layer can be adjusted. The color structural layer 32 is arranged on the black structural layer. On the upper side of 31 , the electrochromic display panel of the present invention displays various colors except black through the color structure layer 32 .

Referring to FIG. 2b, the color structure layer 32 can also be disposed on the lower side of the black structure layer 31. In the vertical direction 10, the electrochromic display panel shown in the present invention includes a first A substrate 1, an electrochromic pixel array 3 and a second substrate 4. The electrochromic pixel array 3 includes a plurality of arrays arranged and independently controlled electrochromic units 30. The electrochromic unit 30 includes a black structure layer 31 and a color structure Layer 32 , the black structure layer 31 includes a first electrode 311 , a black electrochromic pixel layer 312 and a second electrode 313 sequentially arranged on the color structure layer 32 in the vertical direction 10 . When the power is turned on, the black structure layer 31 turns black, and when the power is turned off, the black structure layer 31 is transparent. In order to present a color image, the color structure layer 32 includes a plurality of cyan structural units 321 , magenta structural units 322 and yellow structural units 323 that are vertically stacked and arranged. The order of each layer can be adjusted. The color structural layer 32 is disposed on the first substrate. 1 and the black structure layer 31 , the electrochromic display panel of the present invention displays various colors except black through the color structure layer 32 .

The black structure layer 31 can realize not only pure black display, but also grayscale display.

Please refer to FIG. 3 , the first electrode 31 has a first opposite surface 311 opposite to the second electrode 33 , the second electrode 33 has a second opposite surface 331 opposite to the first electrode 31 , the first opposite surface 311 and/or the first opposite surface 311 Several micro-nano structures 5 are disposed on the two opposite surfaces 331 . Herein, the micro-nano structure 5 is provided on the second opposite surface 331 as an example for description, which is not a preferred or limited structure. In addition, the micro-nano structure 5 can be formed by a photolithography process, a laser etching process, a nano-imprinting process, or the like. The conventional first electrode 31 and the second electrode 33 are generally rectangular or circular in shape, and the first electrode 31 and the second electrode 33 are described as being rectangular in shape here. Considering the technical difficulty and cost, the micro-nano structure 5 is preferably a concave-convex groove structure, and the concave-convex groove structure 5 may be periodically or aperiodically distributed on the second electrode 33 . In addition, the grooves of the concave-convex grooved structure 5 have the same width or different widths; the same or different depths of the grooves; and the shape of the grooves is a rectangle, a trapezoid, or an arc.

When the concave-convex groove structure 5 is periodically distributed on the second opposite surface 331 of the second electrode 33 , the electric field distribution between the first electrode 31 and the second electrode 33 is uniform. Alternatively, referring to FIG. 4 , since the electric field at the edge of the second electrode 33 is more likely to be unevenly distributed, the concave-convex groove structure 5 is aperiodically distributed on the second opposite surface 331 of the second electrode 33 , and the concave-convex groove The distribution of the type structures 5 near the edge of the second electrode 33 is tighter than that near the center of the second electrode 33 . Of course, the concave-convex groove structure 5 may also be provided on the first electrode 31 alone, or on both the first electrode 31 and the second electrode 33 . In addition, the first electrode 31 and the second electrode 33 may also have a circular structure, and the arrangement method thereof is the same as that in the above-mentioned case, and will not be described herein again.

In the present invention, the black structure layer 31 is further provided with a solid first ion storage layer 314 and a first conductive layer 315, the first ion storage layer 314 is provided on the first electrode 21, and the first conductive layer 315 is provided on the first ion storage layer 314. On an ion storage layer 314 , the black electrochromic pixel layer 312 is disposed on the first conductive layer 315 . Of course, referring to FIG. 4 , the cyan structural unit 321 , the yellow structural unit 322 and the magenta structural unit 323 in the color structural layer 32 are similar to the black structural unit 31 . The third electrode 3211, the second ion storage layer 3212, the second conductive layer 3213, the cyan electrochromic pixel layer 3214 and the fourth electrode 3215; the magenta structural unit 322 includes the fifth electrode 3221, the first The three-ion storage layer 3222, the third conductive layer 3223, the magenta electrochromic pixel layer 3224 and the sixth electrode 3225; the yellow structural unit 323 includes a seventh electrode 3231, a fourth ion storage layer 3232, a seventh electrode 3231, a fourth ion storage layer 3232, The fourth conductive layer 3233 , the yellow electrochromic pixel layer 3234 and the eighth electrode 3235 . The micro-nano structure 5 can also be provided on any one or more electrodes among the third electrode 3211, the fourth electrode 3215, the fifth electrode 3221, the sixth electrode 3225, the seventh electrode 3231 or the eighth electrode 3235. Here No further explanation will be given.

Please refer to FIG. 5 , in the present invention, the color rendering effect can also be enhanced by setting the white reflective layer 2 . Specifically, the white reflective layer 2 is disposed between the first substrate 1 and the electrochromic pixel array 3 . The white reflective layer 2 is formed of polymer resin and white particles, the polymer resin can be selected from any one of phenolic resin, epoxy resin, polyamide resin, polyurethane resin or acrylic resin, and the white particles can be selected from oxide resin Any one or more of aluminum, zinc oxide, titanium oxide, or silicon dioxide. The black structural layer 31 and the colored structural layer 32 are solid-state structures. When the white reflective layer 2 does not have adhesive properties, the electrochromic pixel array 3 can be formed by disposing the adhesive layer 21 between the white reflective layer 2 and the electrochromic pixel array 3 . The array 3 is adhered to the white reflective layer 2 as shown in FIG. 6 . Wherein, the thickness of the white reflection layer 2 is preferably 1-40 μm, and the thickness of the adhesive layer 21 is preferably 1-40 μm. When the white reflective layer 2 has viscosity, that is, when a viscous polymer resin is used, the electrochromic pixel array 3 can be directly adhered to the white reflective layer 2, wherein the thickness of the white reflective layer 2 is preferably 10-70 μm. Through this arrangement, the encapsulation step of the liquid electrochromic material is omitted, and the collapse of the electrode located above the gap due to the pressure difference and the easy occurrence of liquid leakage are avoided, which not only ensures the electrochromic display panel with this structure The stability and flatness can also avoid or reduce the occurrence of phenomena such as Newton's rings that are not conducive to the display effect.

The black electrochromic pixel layer 312, the cyan electrochromic pixel layer 3214, the magenta electrochromic pixel layer 3224 and the yellow electrochromic pixel layer 3234 in the present invention are provided with electrochromic materials, which are selected from the group consisting of Any of electrochromic materials, inorganic electrochromic materials or composite electrochromic materials, wherein the inorganic electrochromic materials include metal oxides, preferably tungsten trioxide and nickel oxide; organic electrochromic materials are preferably It is any one or more of viologens, isophthalates, metal phthalocyanines, pyridine metal complexes, polyanilines, polypyrroles, and polythiophenes, which can be produced by sputtering, It can be prepared by methods such as chemical vapor deposition, sol-gel or evaporation, or it can be prepared by drying and curing the liquid electrochromic material. In the present invention, the first substrate 1 and the second substrate 4 are transparent substrates, the first electrode 31 , the second electrode 33 , the third electrode 3211 , the fourth electrode 3215 , the fifth electrode 3221 , the sixth electrode 3225 , the The seventh electrode 3231 and the eighth electrode 3235 are transparent electrodes, which have a linear structure or a planar structure, preferably a mesh structure. The electrode structure in the present invention is preferably a transparent electrode, which is selected from any of indium tin oxide (ITO), fluorine-doped tin oxide (FTO) or conductive polymers. The first substrate 1 and the second substrate 4 can be transparent inorganic substrates, such as quartz or glass, can also be transparent plastics, and can also be other common transparent materials.

The present invention also provides an electronic paper (not shown), which includes the above-mentioned electrochromic display panel, and other structures are in the prior art, which will not be described here.

The present utility model will be described in further detail below with reference to specific embodiments.

Example 1

Referring to FIGS. 7 and 8 , the electrochromic display panel shown in this embodiment includes a first substrate 1-1, a white reflective layer 1-2, an adhesive layer 1-21, an electrochromic layer arranged in sequence from bottom to top The pixel array 1-3 and the second substrate 1-4, the electrochromic pixel array 1-3 includes a plurality of arrays arranged and independently controlled electrochromic units 1-30, the electrochromic unit 1-30 includes a black structure layer 1-31 and color structure layer 1-32. The black structure layer 1-31 includes a first transparent electrode 1-311, a first ion storage layer 1-312, a first conductive layer 1-313, a black electrochromic pixel layer 1-314 and a Two transparent electrodes 1-315, the first transparent electrode 1-311 is adhered on the white reflective layer 1-2 through the adhesive layer 1-21. The black structural layer 1-31 is adhered to the white reflective layer 1-2 through the adhesive layer 1-21. The black electrochromic pixel layer 1-314 contains a black electrochromic material. Layer 1-314 turns black, and when power is turned off, black electrochromic pixel layer 1-314 is transparent. The color structure layer 1-32 includes a plurality of cyan structural units 1-321, yellow structural units 1-322 and magenta structural units 1-323 that are vertically stacked and arranged. The electrochromic display panel of this embodiment passes through the color structural layer 1 -31 shows various colors except black.

The cyan structural unit 1-321 in this embodiment includes a third transparent electrode 1-3211, a second ion storage layer 1-3212, a second conductive layer 1-3213, and a cyan electrochromic pixel layer 1, which are sequentially arranged from bottom to top -3214 and the fourth transparent electrode 1-3215; the yellow structural unit 1-322 includes the fifth transparent electrode 1-3221, the third ion storage layer 1-3222, the third conductive layer 1-3223, Yellow electrochromic pixel layer 1-3224 and sixth transparent electrode 1-3225; magenta structural unit 1-323 includes seventh transparent electrode 1-3231, fourth ion storage layer 1-3232, The fourth conductive layer 1-3233, the magenta electrochromic pixel layer 1-3234, and the eighth transparent electrode 1-3235. In this embodiment, the structural order of each layer in the color structure layer 1-32 is cyan structural unit 1-321, yellow structural unit 1-322 and magenta structural unit 1-323 from bottom to top. Of course, in other implementations In an example, the sequence can be changed according to actual needs.

In this embodiment, the first transparent electrode 1-311 has a first opposite surface 1-3111 opposite to the second transparent electrode 1-315, and the second transparent electrode 1-315 has a first opposite surface 1-311 opposite to the first transparent electrode 1-311 The second opposite surface 1-3151, the third transparent electrode 1-3211 has the third opposite surface 1-3210 opposite to the fourth transparent electrode 1-3215, the fourth transparent electrode 1-3215 has the first transparent electrode 1-3211 The opposite fourth opposite surface 1-3216, the fifth transparent electrode 1-3221 has a fifth opposite surface 1-3220 opposite to the sixth transparent electrode 1-3225, and the sixth transparent electrode 1-3225 has a fifth transparent electrode 1-3220. The sixth opposite surface 1-3226 opposite to -3221, the seventh transparent electrode 1-3231 has the seventh opposite surface 1-3230 opposite to the eighth transparent electrode 1-3235, the eighth transparent electrode 1-3235 has the seventh transparent electrode 1-3235 The eighth opposite surface 1-3236 opposite the electrode 1-3231. In order to make the electric field distribution in the black structure layer 1-31 and the color structure layer 1-32 more uniform, in this embodiment, the first opposite surface 1-3111, the second opposite surface 1-3151, the third opposite surface 1-3211, Several concave-convex groove structures 1-5 are arranged on the fourth opposite surface 1-3251, the fifth opposite surface 1-3220, the sixth opposite surface 1-3226, the seventh opposite surface 1-3230 and the eighth opposite surface 1-3236 , and the concave-convex groove structures 1-5 are more closely distributed near the edge of the electrode. With this arrangement, the electric field boundary effect can be avoided, and the electric field distribution can be made more uniform. In addition, the width and depth of the grooves of the concave-convex grooved structures 1-5 are the same; the shape of the grooves is a rectangle. In this embodiment, the first transparent electrode 1-311, the second transparent electrode 1-315, the third transparent electrode 1-3211, the fourth transparent electrode 1-3215, the fifth transparent electrode 1-3221, and the sixth transparent electrode 1 -3225, the seventh transparent electrode 1-3231 and the eighth transparent electrode 1-3235 are all rectangular structures, and indeed, in other embodiments, they may also be circular structures. The concave-convex groove structure 1-5 in this embodiment is disposed on the first transparent electrode 1-311, the second transparent electrode 1-315, the third transparent electrode 1-3211, the fourth transparent electrode 1-3215, and the fifth transparent electrode 1 -3221, the sixth transparent electrode 1-3225, the seventh transparent electrode 1-3231, and the eighth transparent electrode 1-3235, it is true that in other embodiments, the concave-convex groove structure 1-5 can also be separately arranged on the first transparent electrode A transparent electrode 1-311 or a second transparent electrode 1-315 or a third transparent electrode 1-3211 or a fourth transparent electrode 1-3215 or a fifth transparent electrode 1-3221 or a sixth transparent electrode 1-3225 or a seventh transparent electrode On the electrode 1-3231 or the eighth transparent electrode 1-3235, or on the first transparent electrode 1-311, the second transparent electrode 1-315, the third transparent electrode 1-3211, the fourth transparent electrode 1-3215, the Any two or more electrodes between the five transparent electrodes 1-3221, the sixth transparent electrodes 1-3225, the seventh transparent electrodes 1-3231 or the eighth transparent electrodes 1-3235 are provided.

In this embodiment, both the black structure layer 1-31 and the color structure layer 1-32 are solid structures. The white reflective layer 1-2 is composed of phenolic resin and dispersed titanium oxide, and is disposed on the first substrate 1-1 by spin coating. In addition, the thickness of the white reflection layer 1-2 was 20 μm, and the thickness of the adhesive layer 1-21 was 15 μm. Compared with adhering the first transparent electrode 1-31 with a sticky white reflective layer, by providing the adhesive layer 1-21, a better adhesion effect can be achieved, and the electrochromic pixel array 1-3 can be more stable fixed on the white reflective layer 1-2.

Embodiment 2

Referring to FIG. 9 and FIG. 10 , the electrochromic display panel shown in this embodiment includes a first substrate 2-1, a white reflective layer 2-2, an adhesive layer 2-21, an electrochromic layer arranged in sequence from bottom to top The pixel array 2-3 and the second substrate 2-4, the electrochromic pixel array 2-3 includes a plurality of arrayed, independently controlled electrochromic units, the electrochromic unit includes a black structure layer 2-31 and a color structure Layers 2-32. The color structure layer 2-32 is adhered to the white reflective layer 2-2 through the adhesive layer 2-21, which includes a plurality of cyan structural units 2-321, magenta structural units 2-322 and yellow structural units arranged vertically stacked 2-323, the electrochromic display panel of this embodiment displays various colors except black through the color structure layer 2-31. The black structural layer 2-31 includes a first transparent electrode 2-311, a first ion storage layer 2-312, a first conductive layer 2-313, a black electrochromic pixel layer 2-314 and a Two transparent electrodes 2-315, and a first transparent electrode 2-311 is disposed on the color structure layer 2-32. Wherein, the black structural layer 2-31 is adhered to the white reflective layer 2-2 through the adhesive layer 2-21. The black electrochromic pixel layer contains black electrochromic material. When electrified, the black electrochromic pixel layer 2- 314 turns black, and when the power is turned off, the black electrochromic pixel layer is transparent. The first transparent electrode 2-311 has a first opposite surface 2-3111 opposite to the second transparent electrode 2-315, and the second transparent electrode 2-315 has a second opposite surface opposite to the first transparent electrode 2-311 2-3151, in order to make the electric field distribution between the first transparent electrode 2-311 and the second transparent electrode 2-315 more uniform, this embodiment is arranged on the first opposite surface 2-3111 and the second opposite surface 2-3151 Several periodically distributed concave-convex groove structures 2-5 are provided, and the concave-convex groove structures 2-5 are evenly distributed on the second transparent electrode 2-315.

In this embodiment, the structural order of each layer in the color structure layer 2-32 is cyan structural unit 2-321, magenta structural unit 2-322 and yellow structural unit 2-323 from bottom to top. Of course, in other implementations In an example, the sequence can be changed according to actual needs. In addition, the electrodes in the cyan structural unit 2-321, the magenta structural unit 2-322 and the yellow structural unit 2-323 are also provided with micro-nano structures 2-5 in the same manner as the first transparent electrodes 2-311 and 2-323. The settings on the second transparent electrodes 2-315 are the same, and will not be described herein again.

Embodiment 3

The structure of the electrochromic display panel of this embodiment is basically the same as that of the first embodiment, and the difference lies in that, this embodiment does not provide an adhesive layer, but uses a sticky white reflective layer to adhere the electrochromic pixels arrays, which are simpler in structure and easier to prepare. In this embodiment, the thickness of the white reflective layer is 45 μm.

To sum up, in the electrochromic display panel and electronic paper of the present invention, an electrochromic pixel array is arranged between the first substrate and the second substrate, and a black structure layer and a color structure are arranged in the electrochromic pixel array. Floor. When powered on, the black electrochromic layer turns black, and when powered off, the black electrochromic layer is transparent; the electrochromic display panel and electronic paper display various colors except black through the color structure layer. In addition, by arranging micro-nano structures on the first electrode and/or the second electrode in the electrochromic pixel array, the contact area can be increased, so that it has better electrochemical performance, and the electric field between the two electrodes can be improved. The distribution of the ions is more uniform, thereby enhancing its conductive effect and response speed, and its structure is simple and easy to prepare.

In the electrochromic display panel and electronic paper, the electrochromic pixel array is fixed on the white reflective layer in an adhesive manner, which not only ensures the stability and flatness of the structure, but also avoids or reduces Newton's rings, which are unfavorable for display. The phenomenon of the effect is produced and the quality of the product is improved.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present utility model, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (15)

1. An electrochromic display panel is characterized by comprising a first substrate, an electrochromic pixel array and a second substrate which are sequentially arranged, wherein the electrochromic pixel array comprises a plurality of array-arranged independently-controlled electrochromic units, each electrochromic unit comprises a black structure layer and a color structure layer, each black structure layer comprises a first electrode, a black electrochromic pixel layer and a second electrode which are arranged on the first substrate, each color structure layer comprises a plurality of cyan structure units (C), yellow structure units (Y) and magenta structure units (M) which are longitudinally overlapped and arranged, and each color structure layer is arranged on one side of the corresponding black structure layer; the first electrode is provided with a first opposite surface opposite to the second electrode, the second electrode is provided with a second opposite surface opposite to the first electrode, and a plurality of micro-nano structures are arranged on the first opposite surface and/or the second opposite surface.

2. The electrochromic display panel according to claim 1, wherein the structural unit comprises two electrodes disposed opposite to each other and an ion storage layer, a conductive layer, a C or Y or M electrochromic pixel layer disposed between the two electrodes in this order.

3. The electrochromic display panel according to claim 2, wherein said micro-nano structure is provided on said electrode.

4. The electrochromic display panel according to claim 1 or 3, wherein the micro-nano structure is a groove-and-projection type structure.

5. The electrochromic display panel according to claim 4, wherein the widths of the groove types of the concavo-convex groove type structure are the same or different; the depths of the groove types are the same or different; the shape of the groove is rectangular, trapezoidal or arc.

6. The electrochromic display panel of claim 1 wherein said micro-nano structures are in a periodic or aperiodic distribution.

7. The electrochromic display panel of claim 1 further comprising a white reflective layer disposed between said first substrate and said electrochromic pixel array.

8. The electrochromic display panel of claim 7 further comprising an adhesive layer disposed between said white reflective layer and an electrochromic pixel array, said electrochromic pixel array adhered to said white reflective layer by said adhesive layer.

9. The electrochromic display panel of claim 7 wherein said white reflective layer is formed of an adhesive polymer resin and white particles, said electrochromic pixel array being adhered to said white reflective layer.

10. The electrochromic display panel according to claim 1, wherein the black structure layer further comprises a first ion storage layer and a first conductive layer which are sequentially stacked and disposed between the first electrode and the black electrochromic pixel layer.

11. The electrochromic display panel according to claim 10, wherein said one ion storage layer and said first conductive layer are solid state structures.

12. The electrochromic display panel according to claim 1, wherein an electrochromic material is provided in the black electrochromic pixel layer, and the electrochromic material is selected from any one of organic electrochromic materials, inorganic electrochromic materials, and composite electrochromic materials.

13. The electrochromic display panel according to claim 2, wherein an electrochromic material is provided in the C, Y, M electrochromic pixel layer, and the electrochromic material is selected from any one of organic electrochromic material, inorganic electrochromic material and composite electrochromic material.

14. The electrochromic display panel according to claim 12 or 13 wherein said organic electrochromic material is preferably any one or more of viologens, isophthalates, metal phthalocyanines, pyridine based metal complexes, polyanilines, polypyrroles, polythiophenes.

15. An electronic paper characterized by comprising the electrochromic display panel according to any one of claims 1 to 14.

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