CN212484034U - Electrochromic display panel and electronic paper - Google Patents

Abstract

The utility model relates to an electrochromic display panel and electronic paper, this electrochromic display panel are including the first base plate, electrochromic pixel array and the second base plate that set gradually, electrochromic pixel array includes that a plurality of arrays arrange, independent control's electrochromic unit, electrochromic unit includes black structural layer and colored structural layer, the black structural layer is including setting up first electrode, black electrochromic pixel layer and second electrode on the first base plate, colored structural layer includes a plurality of vertical cyan constitutional unit, yellow constitutional unit and the magenta constitutional unit of arranging that superpose, colored structural layer sets up black structural layer one side. The electrochromic display panel and the electronic paper can display black and other colors, are rich in display color, simple in structure and easy to prepare, save the production cost and improve the product quality.

Description

Electrochromic display panel and electronic paper

Technical Field

The utility model relates to an electrochromic display panel and electronic paper belongs to and shows technical field.

Background

Current display technologies can be divided into two broad categories: one type is paper display, which is mainly characterized in that: content is displayed by reflecting ambient light, color display is easy, viewing angle is large (close to 180 degrees), and the medium is soft. The other type is electronic display such as CRT, LCD, LED, etc., which is mainly characterized in that: the information can be refreshed quickly, the content is displayed by means of the internal luminescence of the display, more electric energy is consumed during working, people are easy to fatigue during reading, and the medium is not soft. Electrochromism (EC) refers to a phenomenon in which optical properties (reflectivity, transmittance, absorption, etc.) of a material undergo a stable and reversible color change under the action of an external electric field, and is visually represented as a reversible change in color and transparency. Materials having electrochromic properties are referred to as electrochromic materials, and devices made with electrochromic materials are referred to as electrochromic devices. Electrochromic materials are one of the hot spots of material science research in recent years. The electrochromic material is an important component in an electrochromic device and dominates the electrochromic performance of the device. Electrochromic materials can be classified into anodic electrochromic materials (ion-intercalation coloring) and cathodic electrochromic materials (ion-extraction coloring) according to the structural properties of the materials. The anode electrochromic material and the cathode electrochromic material can be assembled into a complementary electrochromic device, and the complementary device can improve the whole electrochromic performance such as optical contrast, color change, spectral absorption range and the like. Currently, the existing electrochromic display panel has the following problems:

1) theoretically, only the three basic colors of Cyan (Cyan), Magenta (Magenta) or Magenta (Magenta) and Yellow (Yellow) are mixed together in equal proportion to obtain black, but because of the limitations of the current manufacturing process level, the purity of the manufactured product is not high enough, and the CMY addition result is actually only a dark red color;

2) the response speed is slow, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrochromic display panel and electronic paper, it can show black, can show other colours again, has abundant display effect, and response speed is fast, simple structure, easily preparation.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an electrochromic display panel, is including the first base plate, electrochromic pixel array and the second base plate that set gradually, electrochromic pixel array includes that a plurality of arrays arrange, independent control's electrochromic unit, electrochromic unit includes black structural layer and colored structural layer, the black structural layer is including setting up first electrode, black electrochromic pixel layer and second electrode on the first base plate, the colored structural layer includes cyan constitutional unit (C), yellow constitutional unit (Y) and magenta constitutional unit (M) that a plurality of vertical superpositions were arranged, the colored structural layer sets up black structural layer one side.

Furthermore, the structural unit comprises two electrodes which are oppositely arranged, and an ion storage layer, a conductive layer and a C or Y or M electrochromic pixel layer which are arranged between the two electrodes and are sequentially arranged.

Further, the ion storage layer and the conductive layer are solid structures.

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

Further, the electrochromic display panel further comprises an adhesive layer, wherein the adhesive layer is arranged between the white reflecting layer and the electrochromic pixel array, and the electrochromic pixel array is adhered to the white reflecting layer through the adhesive layer.

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

Furthermore, the black structure layer further comprises a first ion storage layer and a first conductive layer which are sequentially stacked and arranged between the first electrode and the black electrochromic pixel layer.

Furthermore, the ion storage layer and the first conductive layer are solid structures.

Further, the first electrode and/or the second electrode are transparent electrodes.

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

Further, an electrochromic material is arranged in the C, Y, M electrochromic pixel layer, and the electrochromic material is selected from any one of organic electrochromic materials, inorganic electrochromic materials or composite electrochromic materials.

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

The utility model also provides an electronic paper, it includes foretell electrochromic display panel.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses an electrochromic display panel and electronic paper are equipped with electrochromic pixel array between first base plate and second base plate, are provided with black structural layer and color structure layer in electrochromic pixel array. When the power is on, the black electrochromic layer becomes black, and when the power is off, the black electrochromic layer is transparent; the electrochromic display panel and the electronic paper display various colors except black through the color structure layer. Therefore, the electrochromic display panel and the electronic paper can display black and other colors, are rich in display colors, simple in structure and easy to prepare.

The electrochromic display panel and the electronic paper fix the electrochromic pixel array on the white reflecting layer in an adhesive mode, so that the stability and the smoothness of the structure are ensured, the phenomena such as Newton rings which are not beneficial to the display effect can be avoided or reduced, and the product quality is improved.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is a top view of an electrochromic display panel according to the present invention;

fig. 2a and 2b are schematic diagrams of two structures of an electrochromic display panel according to the present invention;

fig. 3 and 4 are schematic views of another two structures of the electrochromic display panel according to the present invention;

fig. 5 is a schematic structural diagram of an electrochromic display panel according to a first embodiment of the present invention;

FIG. 6 is a schematic diagram of the structure of an electrochromic cell in the electrochromic display panel shown in FIG. 5;

fig. 7 is a schematic structural diagram of an electrochromic display panel according to the second embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

It should be noted that: the terms such as "upper", "lower", "left", "right", "inner" and "outer" of the present invention are described with reference to the drawings, and are not intended to be limiting terms.

Referring to fig. 1 and fig. 2a, in the vertical direction 10, the electrochromic display panel of the present invention includes a first substrate 1, an electrochromic pixel array 3 and a second substrate 4, which are sequentially disposed from bottom to top, the electrochromic pixel array 3 includes a plurality of array arrangements, an independently controlled electrochromic unit 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 (K)312 and a second electrode 313, which are sequentially disposed on the first substrate 1, in the vertical direction 10. When the power is turned on, the black structure layer 31 becomes 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 structure units 321, magenta structure units 322 and yellow structure units 323 arranged in a longitudinal overlapping manner, the sequence of each layer can be adjusted, the color structure layer 32 is disposed on the upper side of the black structure layer 31, and the electrochromic display panel displays various colors except black through the color structure layer 32.

Please refer to fig. 2b, the color structure layer 32 can be further disposed on the lower side of the black structure layer 31, and in the vertical direction 10, the electrochromic display panel of the present invention includes a first substrate 1, an electrochromic pixel array 3 and a second substrate 4 which are sequentially disposed from bottom to top, the electrochromic pixel array 3 includes a plurality of arrays, the independently controlled electrochromic unit 30 includes the black structure layer 31 and the 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 which are sequentially disposed on the color structure layer 32 in the vertical direction 10. When the power is turned on, the black structure layer 31 becomes 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 structure units 321, magenta structure units 322 and yellow structure units 323 arranged in a longitudinal superposition manner, the sequence of each layer can be adjusted, the color structure layer 32 is disposed between 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 gray display.

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 disposed on the first electrode 21, the first conductive layer 315 is disposed on the first ion storage layer 314, and the black electrochromic pixel layer 312 is disposed on the first conductive layer 315. Of course, 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 layer 31, and specifically, the cyan structural unit 321 includes a third electrode 3211, a second ion storage layer 3212, a second conductive layer 3213, a cyan electrochromic pixel layer 3214, and a fourth electrode 3215, which are sequentially disposed from bottom to top; the magenta color constitutional unit 322 includes a fifth electrode 3221, a third ion storage layer 3222, a third conductive layer 3223, a magenta color electrochromic pixel layer 3224, and a sixth electrode 3225, which are arranged in this order from bottom to top; the yellow structure unit 323 includes a seventh electrode 3231, a fourth ion storage layer 3232, a fourth conductive layer 3233, a yellow electrochromic pixel layer 3234, and an eighth electrode 3235, which are sequentially disposed from bottom to top.

Please refer to fig. 3, in the present invention, the white reflective layer 2 can be further disposed to enhance the color effect. 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 a polymer resin selected from any one of phenol resin, epoxy resin, polyamide resin, polyurethane resin or acrylic resin, and white particles selected from any one or more of alumina, zinc oxide, titanium oxide or silica. The black structure layer 31 and the color structure layer 32 are solid structures, and when the white reflective layer 2 has no viscosity, the electrochromic pixel array 3 can be adhered to the white reflective layer 2 by disposing the adhesive layer 21 between the white reflective layer 2 and the electrochromic pixel array 3, as shown in fig. 4. The thickness of the white reflective layer 2 is preferably 1 to 40 μm, and the thickness of the adhesive layer 21 is preferably 1 to 40 μm. When the white reflective layer 2 is adhesive, i.e. a viscous polymer resin is selected, the electrochromic pixel array 3 may be directly adhered to the white reflective layer 2, wherein the thickness of the white reflective layer 2 is preferably 10-70 μm. Through the arrangement, the packaging step of the liquid electrochromic material is omitted, the phenomena that the electrode above the gap collapses and liquid leakage easily occurs due to pressure difference are avoided, the stability and the flatness of the electrochromic display panel with the structure are ensured, and the phenomena that Newton rings and the like are not beneficial to the display effect can be avoided or reduced.

The utility model provides an be equipped with electrochromic material in black electrochromic pixel layer 312, cyan electrochromic pixel layer 3214, magenta electrochromic pixel layer 3224 and yellow electrochromic pixel layer 3234, it is selected from any kind including organic electrochromic material, inorganic electrochromic material or compound electrochromic material, wherein, inorganic electrochromic material includes metal oxide, preferred is tungsten trioxide, nickel oxide; the organic electrochromic material is preferably any one or more of viologens, isophthalates, metal phthalocyanines, pyridine metal complexes, polyanilines, polypyrroles and polythiophenes, and can be prepared by methods such as sputtering, chemical vapor deposition, sol-gel or evaporation, or can be prepared by drying and curing a liquid electrochromic material. In the present invention, the first substrate 1 and the second substrate 4 are transparent substrates, and 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 seventh electrode 3231, and the eighth electrode 3235 are transparent electrodes, and have a linear structure or a planar structure, preferably a mesh structure. The electrode structure of the present invention is preferably a transparent electrode selected from any one of the group consisting of Indium Tin Oxide (ITO), fluorine-doped tin oxide (FTO) or a conductive polymer. The first substrate 1 and the second substrate 4 may be transparent inorganic substrates, such as quartz or glass, or may be transparent plastics, or may be other commonly used transparent materials.

The present invention also provides an electronic paper (not shown) including the above electrochromic display panel, and other structures are prior art and will not be described herein.

The present invention will be described in further detail with reference to specific embodiments.

Example one

Referring to fig. 5 and 6, 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 pixel array 1-3, and a second substrate 1-4, which are sequentially disposed from bottom to top, where the electrochromic pixel array 1-3 includes a plurality of electrochromic units 1-30 arranged in an array and independently controlled, and the electrochromic units 1-30 include a black structure layer 1-31 and a color structure layer 1-32. The black structure layer 1-31 comprises 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 second transparent electrode 1-315 which are arranged from bottom to top in sequence, wherein the first transparent electrode 1-311 is adhered to the white reflecting layer 1-2 through an adhesive layer 1-21. The black structure layer 1-31 is adhered to the white reflection layer 1-2 through the adhesive layer 1-21, the black electrochromic pixel layer 1-314 contains black electrochromic materials, when the black structure layer is electrified, the black electrochromic pixel layer 1-314 becomes black, and when the black structure layer is powered off, the black electrochromic pixel layer 1-314 is transparent. The color structure layer 1-32 includes a plurality of cyan structure units 1-321, yellow structure units 1-322, and magenta structure units 1-323 arranged in a vertically stacked manner, and the electrochromic display panel of the embodiment displays various colors except black through the color structure layer 1-31.

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

In the present embodiment, the black structure layer 1-31 and the color structure layer 1-32 are both solid structures. The white reflective layer 1-2 is composed of a phenol resin and dispersed titanium oxide, and is disposed on the first substrate 1-1 by spin coating. The thickness of the white reflective layer 1-2 was 20 μm, and the thickness of the adhesive layer 1-21 was 15 μm. By providing the adhesive layers 1-21, a better adhesion effect can be achieved than by adhering the first transparent electrodes 1-31 with an adhesive white reflective layer, so that the electrochromic pixel arrays 1-3 are more stably fixed on the white reflective layers 1-2.

Example two

Referring to fig. 7, the electrochromic display panel of the present embodiment includes a first substrate 2-1, a white reflective layer 2-2, an adhesive layer 2-21, an electrochromic pixel array 2-3, and a second substrate 2-4, which are sequentially disposed from bottom to top, where the electrochromic pixel array 2-3 includes a plurality of electrochromic units arranged in an array and independently controlled, and each electrochromic unit includes a black structure layer 2-31 and a color structure layer 2-32. The color structure layer 2-32 is adhered to the white reflection layer 2-2 through an adhesive layer 2-21, and comprises a plurality of cyan structure units 2-321, magenta structure units 2-322 and yellow structure units 2-323 which are longitudinally overlapped, and the electrochromic display panel of the embodiment displays various colors except black through the color structure layer 2-31. The black structure layer 2-31 includes a first transparent electrode (not shown), a first ion storage layer (not shown), a first conductive layer (not shown), a black electrochromic pixel layer (not shown), and a second transparent electrode (not shown) sequentially disposed from bottom to top, and the first transparent electrode is disposed on the color structure layer 2-32. The black structure layer 2-31 is adhered to the white reflection layer 2-2 through the adhesive layer 2-21, the black electrochromic pixel layer contains black electrochromic materials, when the black structure layer is electrified, the black electrochromic pixel layer becomes black, and when the black structure layer is powered off, the black electrochromic pixel layer is transparent.

In this embodiment, the structural order of the layers in the color structural layers 2-32 is cyan structural unit 2-321, magenta structural unit 2-322 and yellow structural unit 2-323 from bottom to top, but in other embodiments, the order may be changed according to actual needs.

EXAMPLE III

The electrochromic display panel of this embodiment has substantially the same structure as the first embodiment, except that the present embodiment does not provide an adhesive layer, and the electrochromic pixel array is adhered by using a white reflective layer having adhesiveness, which has a simpler structure and is easier to manufacture. In this embodiment, the thickness of the white reflective layer is 45 μm.

In summary, the following steps: the utility model discloses an electrochromic display panel and electronic paper are equipped with electrochromic pixel array between first base plate and second base plate, are provided with black structural layer and color structure layer in electrochromic pixel array. When the power is on, the black electrochromic layer becomes black, and when the power is off, the black electrochromic layer is transparent; the electrochromic display panel displays various colors except black through a color structure layer. Therefore, the electrochromic display panel can display black and other colors, is rich in display color, simple in structure and easy to prepare. The electrochromic display panel and the electronic paper fix the electrochromic pixel array on the white reflecting layer in an adhesive mode, so that the stability and the smoothness of the structure are ensured, the phenomena such as Newton rings which are not beneficial to the display effect can be avoided or reduced, and the product quality is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (11)

1. The utility model provides an electrochromic display panel, its characterized in that, is including the first base plate, electrochromic pixel array and the second base plate that set gradually, electrochromic pixel array includes that a plurality of arrays arrange, independent control's electrochromic unit, electrochromic unit includes black structural layer and colored structural layer, the black structural layer is including setting up first electrode, black electrochromic pixel layer and second electrode on the first base plate, colored structural layer includes a plurality of vertically stack cyan constitutional unit, yellow constitutional unit and the magenta constitutional unit of arranging, colored structural layer sets up black structural layer one side.

2. The electrochromic display panel according to claim 1, wherein said cyan structural unit comprises, in order from bottom to top, a third electrode, a second ion storage layer, a second conductive layer, a cyan electrochromic pixel layer, and a fourth electrode; the magenta structural unit comprises a fifth electrode, a third ion storage layer, a third conducting layer, a magenta electrochromic pixel layer and a sixth electrode which are arranged from bottom to top in sequence; the yellow structure unit comprises a seventh electrode, a fourth ion storage layer, a fourth conducting layer, a yellow electrochromic pixel layer and an eighth electrode which are sequentially arranged from bottom to top.

3. The electrochromic display panel of claim 2 wherein said ion storage layer and conductive layer are solid state structures.

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

5. The electrochromic display panel of claim 4 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.

6. 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.

7. The electrochromic display panel according to claim 6 wherein said first ion storage layer and first conductive layer are solid state structures.

8. The electrochromic display panel according to claim 1, wherein the first electrode and/or the second electrode is a transparent electrode.

9. 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 any one of an organic electrochromic material and an inorganic electrochromic material.

10. The electrochromic display panel according to claim 2, wherein electrochromic materials are provided in the cyan electrochromic pixel layer, the yellow electrochromic pixel layer, and the magenta electrochromic pixel layer, and the electrochromic materials are any one of organic electrochromic materials and inorganic electrochromic materials.

11. An electronic paper characterized by comprising the electrochromic display panel according to any one of claims 1 to 10.

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