CN111123605A - Electrochromic display panel and electronic paper - Google Patents

Electrochromic display panel and electronic paper Download PDF

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Publication number
CN111123605A
CN111123605A CN201811292789.7A CN201811292789A CN111123605A CN 111123605 A CN111123605 A CN 111123605A CN 201811292789 A CN201811292789 A CN 201811292789A CN 111123605 A CN111123605 A CN 111123605A
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CN
China
Prior art keywords
electrochromic
layer
display panel
electrode
black
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811292789.7A
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Chinese (zh)
Inventor
浦东林
刘艳花
黄文彬
陈林森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Industrial Park Zhongwei Flexible Photoelectronics Intelligent Manufacturing Research Institute Co ltd
Suzhou University
SVG Optronics Co Ltd
SVG Tech Group Co Ltd
Original Assignee
Suzhou Industrial Park Zhongwei Flexible Photoelectronics Intelligent Manufacturing Research Institute Co ltd
Suzhou University
SVG Tech Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Suzhou Industrial Park Zhongwei Flexible Photoelectronics Intelligent Manufacturing Research Institute Co ltd, Suzhou University, SVG Tech Group Co Ltd filed Critical Suzhou Industrial Park Zhongwei Flexible Photoelectronics Intelligent Manufacturing Research Institute Co ltd
Priority to CN201811292789.7A priority Critical patent/CN111123605A/en
Publication of CN111123605A publication Critical patent/CN111123605A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/1533—Constructional details structural features not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/157—Structural association of cells with optical devices, e.g. reflectors or illuminating devices

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

The invention relates to an electrochromic display panel and electronic paper, wherein the electrochromic display panel comprises a first substrate, an electrochromic pixel array layer and a second substrate which are sequentially arranged, the electrochromic pixel array layer comprises a plurality of electrochromic units which are arranged in an array and independently controlled, and each electrochromic unit comprises a first electrode, a black electrochromic pixel layer and a second electrode which are sequentially arranged. According to the electrochromic display panel and the electronic paper, the black electrochromic pixel layer is arranged between the first electrode and the second electrode to form a plurality of independent electrochromic units, and then the electrochromic units are arranged between the first substrate and the second substrate. The electrochromic display panel and the electronic paper form an electrochromic unit by using the black electrochromic pixel layer, can realize black, gray and white display, have simple structures, are easy to prepare and have better display effect.

Description

Electrochromic display panel and electronic paper
Technical Field
The invention relates to an electrochromic display panel and electronic paper, and belongs to the technical field of display.
Background
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. At present, the existing electrochromic display panel and electronic paper have the following problems:
1) the electrochromic layer is often formed by injecting a liquid electrochromic material into the gap, so that the electrode above the gap is easy to collapse due to pressure difference, the packaging difficulty is high, the liquid leakage phenomenon is easy to occur, and the quality of the electrochromic display panel is seriously influenced;
2) when the ambient light is weak, the display effect is not good, and the use is inconvenient for users;
3) the existing electronic paper often cannot display pure black, or a device for displaying pure black has a complex structure and a slow response speed.
Disclosure of Invention
The invention aims to provide an electrochromic display panel and electronic paper, which can display black, gray and white, and have simple structure and easy preparation.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an electrochromic display panel, is including the first base plate, electrochromic pixel array layer and the second base plate that set gradually, electrochromic pixel array layer includes that a plurality of arrays arrange, the electrochromic unit of independent control, the electrochromic unit is including the first electrode, black electrochromic pixel layer and the second electrode that set gradually.
Further, the electrochromic display panel further comprises a reflective layer disposed between the first substrate and the electrochromic pixel array layer.
Further, the first electrode and/or the second electrode are transparent electrodes.
Further, the electrochromic display panel further comprises an adhesive layer, the adhesive layer is arranged between the reflecting layer and the electrochromic pixel array layer, and the first electrode is adhered to the reflecting layer through the adhesive layer.
Furthermore, the thickness of the reflecting layer is 1-70 μm, and the thickness of the bonding layer is 1-40 μm.
Further, the reflective layer is formed of a polymer resin and white particles.
Furthermore, the electrochromic unit also comprises an ion storage layer and a conducting layer which are sequentially arranged between the first electrode and the black electrochromic pixel layer.
Further, the conductive layer and the ion storage layer are solid structures.
Further, the black electrochromic pixel layer is provided with an electrochromic material, and the electrochromic material is selected from any one or more of an organic electrochromic material, an inorganic electrochromic material or a composite electrochromic material.
Further, the inorganic electrochromic material comprises metal oxide, preferably tungsten trioxide and nickel oxide.
Further, the organic electrochromic material is preferably any one or more of viologens, isophthalates, metal phthalocyanines, pyridine metal complexes, polyanilines, polypyrroles and polythiophenes.
The invention also provides electronic paper which comprises the electrochromic display panel.
Compared with the prior art, the invention has the beneficial effects that: according to the electrochromic display panel and the electronic paper, the black electrochromic pixel layer is arranged between the first electrode and the second electrode to form a plurality of independent electrochromic units, and then the electrochromic units are arranged between the first substrate and the second substrate. The electrochromic display panel and the electronic paper form an electrochromic unit by using the black electrochromic pixel layer, can realize black, gray and white display, have simple structures, are easy to prepare and have better display effect.
The electrochromic display panel and the electronic paper fix the electrochromic pixel array layer on the reflecting layer in a bonding mode, so that the packaging step of a liquid electrochromic material is omitted, the phenomena that an electrode above a gap collapses and is easy to leak due to pressure difference are avoided, the production cost is saved, and the product quality is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a top view of an electrochromic display panel according to the invention;
FIGS. 2a, 2b and 3 are schematic views of three structures of an electrochromic display panel according to the present invention;
fig. 4 is a schematic structural diagram of an electrochromic display panel according to a first embodiment of the invention;
fig. 5 is a schematic structural diagram of an electrochromic display panel according to a second embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with 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 "upper", "lower", "left", "right", "inner" and "outer" of the present invention are used for describing the present invention with reference to the drawings, and are not intended to be limiting terms.
Referring to fig. 1 and fig. 2a, in a vertical direction 10, the electrochromic display panel of the present invention includes a first substrate 1, an electrochromic pixel array layer 3, and a second substrate 4, which are sequentially disposed, where the electrochromic pixel array layer 3 includes a plurality of electrochromic units 30 arranged in an array and independently controlled, and each electrochromic unit 30 includes a first electrode 31, a black electrochromic pixel layer 32, and a second electrode 33, which are sequentially disposed, and when the electrochromic display panel is powered on, the black electrochromic pixel layer 32 becomes black, and when the electrochromic display panel is powered off, the black electrochromic pixel layer 32 is transparent.
Referring to fig. 2b, the electrochromic display panel of the invention further includes a reflective layer 2, and the reflective layer 2 is disposed between the first substrate 1 and the electrochromic pixel array layer 3. In the vertical direction 10, the electrochromic display panel comprises a first substrate 1, a reflecting layer 2, an electrochromic pixel array layer 3 and a second substrate 4 which are sequentially stacked from bottom to top, the electrochromic pixel array layer 3 comprises a plurality of arrays, independently controlled electrochromic units 30, each electrochromic unit 30 comprises a first electrode 31, a black electrochromic pixel layer 32 and a second electrode 33 which are sequentially arranged, when the electrochromic display panel is powered on, the black electrochromic pixel layers 32 become black, and when the electrochromic display panel is powered off, the black electrochromic pixel layers 32 are transparent.
The electrochromic cell 30 can realize not only pure black display but also gray scale display.
In the present invention, the electrochromic cell 30 is further provided with a solid ion storage layer 34 and a conductive layer 35, and the ion storage layer 34 and the conductive layer 35 are sequentially laminated between the first electrode 31 and the black electrochromic pixel layer 32. An ion storage layer 34 is disposed on the first electrode 31, a conductive layer 35 is disposed on the ion storage layer 34, and a black electrochromic pixel layer 32 is disposed on the conductive layer 35.
In the present invention, the reflective layer 2 is formed of a polymer resin which may be selected from any one including a phenol resin, an epoxy resin, a polyamide resin, a polyurethane resin or an acrylic resin, and white particles which may be selected from any one or more of aluminum oxide, zinc oxide, titanium oxide or silicon dioxide. The reflective layer 2 is preferably a white reflective layer. The black electrochromic pixel layer 32 is of a solid-state structure, and as shown in fig. 3, when the reflective layer 2 has no viscosity, the first electrode 31 may be adhered to the reflective layer 2 through the adhesive layer 21 by disposing the adhesive layer 21 between the reflective layer 2 and the electrochromic pixel array layer 3, and disposing the adhesive layer 21 may increase stability. The thickness of the 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 reflective layer 2 is adhesive, i.e. an adhesive polymer resin is selected, the first electrode 31 may be directly adhered to the reflective layer 2, wherein the thickness of the reflective layer 2 is preferably 10-70 μm. Through the arrangement, the stability and the flatness of the electrochromic display panel with the structure are ensured, and the phenomenon that Newton rings and the like are unfavorable for the display effect can be avoided or reduced.
In the present invention, the first substrate 1 and the second substrate 4 are transparent substrates, and the first electrode 31 and the second electrode 33 are transparent electrodes, wherein the first electrode 31 and the second electrode 33 have a linear structure or a planar structure, preferably a mesh structure.
The black electrochromic pixel layer 32 in the invention is provided with an electrochromic material, which is selected from any one or more of an organic electrochromic material, an inorganic electrochromic material or a composite electrochromic material, wherein the inorganic electrochromic material comprises a metal oxide, preferably tungsten trioxide or 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. The first electrode 31 and the second electrode 33 of the present invention are selected from any one 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 invention also provides an electronic paper (not shown) comprising the electrochromic display panel, and other structures are all in the prior art and will not be described herein.
The present invention will be described in further detail with reference to specific examples.
Example one
Referring to fig. 4, the electrochromic display panel shown in this embodiment includes a first substrate 1-1, an electrochromic pixel array layer 1-2, and a second substrate 1-3, which are sequentially disposed from bottom to top, the electrochromic pixel array layer 1-2 includes a plurality of electrochromic units 1-20 arranged in an array and independently controlled, and the electrochromic units 1-20 are sequentially stacked from bottom to top and include a first electrode 1-21, an ion storage layer 1-22, a conductive layer 1-23, a black electrochromic pixel layer 1-24, and a second electrode 1-25. The black electrochromic pixel layers 1 to 24 are made of electrochromic materials, when the power is on, the black electrochromic pixel layers 1 to 24 are changed into black, and when the power is off, the black electrochromic pixel layers 1 to 24 are transparent, so that the electrochromic display panel can realize black, gray and white display.
Example two
Referring to fig. 5, the electrochromic display panel shown in this embodiment includes a first substrate 2-1, a reflective layer 2-2, an adhesive layer 2-3, an electrochromic pixel array layer 2-4, and a second substrate 2-5, which are sequentially stacked from bottom to top, the electrochromic pixel array layer 2-4 includes a plurality of electrochromic units 2-40 arranged in an array and independently controlled, and the electrochromic units 2-40 include a first electrode 2-41, an ion storage layer 2-42, a conductive layer 2-43, a black electrochromic pixel layer 2-44, and a second electrode 2-45, which are sequentially stacked from bottom to top. Wherein the first electrode 2-41 is adhered to the reflective layer 2-2 through the adhesive layer 2-3. The black electrochromic pixel layers 2-44 are made of electrochromic materials, when the power is on, the black electrochromic pixel layers 2-44 are changed into black, and when the power is off, the black electrochromic pixel layers 2-44 are transparent, so that the electrochromic display panel can realize black, gray and white display.
In this embodiment, the reflective layer 2-2 is composed of a phenol resin and dispersed titanium oxide, and is provided on the first substrate 2-1 by a spin coating method. The thickness of the reflective layer 201 was 20 μm, and the thickness of the adhesive layer was 35 μm. By providing the adhesive layer 2-3, a better adhesion effect can be achieved than by adhering the first electrode 2-41 with an adhesive reflective layer, so that the electrochromic pixel array layer 2-4 is more stably fixed on the reflective layer 2-2.
EXAMPLE III
The electrochromic display panel of this embodiment has substantially the same structure as that of the embodiment, except that the embodiment does not provide an adhesive layer, but adheres the electrochromic pixel array layer by using a reflective layer having adhesiveness, and the structure is simpler and easier to manufacture.
In summary, the following steps: according to the electrochromic display panel and the electronic paper, the black electrochromic pixel layer is arranged between the first electrode and the second electrode to form a plurality of independent electrochromic units, and then the electrochromic units are arranged between the first substrate and the second substrate. The electrochromic display panel and the electronic paper form an electrochromic unit by using the black electrochromic pixel layer, can realize black, gray and white display, have simple structures, are easy to prepare and have better display effect. In addition, the electrochromic display panel and the electronic paper fix the electrochromic pixel array layer on the reflecting layer in a bonding mode, so that the packaging step of a liquid electrochromic material is omitted, the phenomena that an electrode above a gap collapses and is easy to leak due to pressure difference are avoided, the production cost is saved, 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 express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. The utility model provides an electrochromic display panel which characterized in that, is including first base plate, electrochromic pixel array layer and the second base plate that sets gradually, electrochromic pixel array layer includes that a plurality of arrays arrange, the electrochromic unit of independent control, electrochromic unit is including the first electrode, black electrochromic pixel layer and the second electrode that set gradually.
2. The electrochromic display panel of claim 1 further comprising a reflective layer disposed between said first substrate and electrochromic pixel array layer.
3. The electrochromic display panel according to claim 1, wherein the first electrode and/or the second electrode is a transparent electrode.
4. The electrochromic display panel of claim 2 further comprising an adhesive layer disposed between said reflective layer and electrochromic pixel array layer, said first electrode being adhered to said reflective layer by said adhesive layer.
5. The electrochromic display panel according to claim 4, wherein the thickness of said reflective layer is 1 to 70 μm and the thickness of said adhesive layer is 1 to 40 μm.
6. The electrochromic display panel according to claim 2, wherein said reflective layer is formed of a polymer resin and white particles.
7. The electrochromic display panel according to claim 1, wherein the electrochromic cell further comprises an ion storage layer and a conductive layer sequentially disposed between the first electrode and the black electrochromic pixel layer.
8. The electrochromic display panel of claim 7 wherein said conductive layer and ion storage layer are solid state structures.
9. The electrochromic display panel according to claim 1, wherein the black electrochromic pixel layer is provided with an electrochromic material selected from any one or more of an organic electrochromic material, an inorganic electrochromic material, or a composite electrochromic material.
10. Electrochromic display panel as claimed in claim 9, characterized in that the inorganic electrochromic material comprises a metal oxide, preferably tungsten trioxide, nickel oxide.
11. The electrochromic display panel according to claim 9, wherein said organic electrochromic material is preferably any one or more of viologens, isophthalates, metal phthalocyanines, pyridine-based metal complexes, polyanilines, polypyrroles, polythiophenes.
12. An electronic paper characterized by comprising the electrochromic display panel according to any one of claims 1 to 11.
CN201811292789.7A 2018-11-01 2018-11-01 Electrochromic display panel and electronic paper Pending CN111123605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811292789.7A CN111123605A (en) 2018-11-01 2018-11-01 Electrochromic display panel and electronic paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811292789.7A CN111123605A (en) 2018-11-01 2018-11-01 Electrochromic display panel and electronic paper

Publications (1)

Publication Number Publication Date
CN111123605A true CN111123605A (en) 2020-05-08

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ID=70494686

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811292789.7A Pending CN111123605A (en) 2018-11-01 2018-11-01 Electrochromic display panel and electronic paper

Country Status (1)

Country Link
CN (1) CN111123605A (en)

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