CN111552105A - Reflection-type color flexible display screen and preparation method thereof - Google Patents
Reflection-type color flexible display screen and preparation method thereof Download PDFInfo
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- CN111552105A CN111552105A CN202010238152.0A CN202010238152A CN111552105A CN 111552105 A CN111552105 A CN 111552105A CN 202010238152 A CN202010238152 A CN 202010238152A CN 111552105 A CN111552105 A CN 111552105A
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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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
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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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133345—Insulating layers
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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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
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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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
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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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134336—Matrix
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Abstract
The invention relates to a reflection-type flexible color display screen and a preparation method thereof, wherein the display screen structure comprises the following components from top to bottom: a transparent flexible substrate (1) with a transparent electrode array (2) on the lower surface; a polymer dispersed liquid crystal electro-optical layer (3); a transparent organic insulating layer (5) and a metal nano-structure array (4) which is deposited and attached on the upper surface of the transparent organic insulating layer and is distributed in an array; a transparent bottom electrode layer (6); a transparent flexible substrate (7); wherein the metal nano structure array (4) is obtained by arranging a plurality of metal nano cylinders with the reflectivity of more than 90 percent in a matrix manner, the diameter of the metal nano cylinder is 100-500nm, the height is 10-100nm, and the distance is 200-1000 nm. The reflection-type color flexible display screen provided by the invention can improve the display contrast, realize rich color display and enhance the display brightness.
Description
Technical Field
The invention relates to a reflection-type color flexible display screen and a preparation method thereof.
Background
The flexible display is a display technology with wide application prospect, has the characteristics of convenience in carrying and use, good pressure resistance and shock resistance, low cost and the like, and is widely applied to the fields of computer display screens, electronic books, electronic tags, medical equipment, electronic communication, wearable equipment and the like. Currently, flexible display technologies are classified into active display technologies and passive display technologies. The active flexible display technology has the advantages of rich colors, high brightness and the like, but also has the defects of high energy consumption, poor display effect under outdoor strong sunlight, great influence on human eye health and the like. The passive display technology works based on reflected ambient light, is much lower than the active light-emitting display technology in energy consumption, has good display effect under strong ambient light, and is particularly consistent with the habit of observing objects (including reading) through reflected light formed by human eyes for a long time. Therefore, a reflective display technology typified by electronic paper has been rapidly developed. However, the existing mainstream electronic paper technology has the defects of slow response speed, difficulty in realizing dynamic display and difficulty in realizing colorization. The polymer dispersed liquid crystal is a novel paper-like reflective flexible display technology, has the advantages of high response speed, dynamic display realization, simple manufacture, low cost, large-format printing and the like, but has low contrast ratio and difficult colorization, thereby limiting the application of the polymer dispersed liquid crystal. Colorization of the polymer dispersed liquid crystal display can be achieved by adding a colored dye, but the addition of the dye reduces reflection of incident light, thereby further reducing brightness and contrast, and increasing driving voltage due to destruction of the interface of the polymer and the liquid crystal. How to further improve the contrast while realizing colorization is always a dilemma faced in the field of polymer dispersed liquid crystal display technology.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-contrast color flexible display screen and a preparation method thereof aiming at the defects in the prior art, the color flexible display screen deposits metal nano structures arranged in an array on the surface of an electrode, and the surface plasmon effect of the metal nano structure array is utilized to enhance the reflection intensity of visible light and improve the display contrast; the color display of the flexible screen is realized by controlling the size of the metal nano structure array to reflect visible light with different colors, so that the problems of low display contrast, difficult color display and the like of the polymer dispersed liquid crystal screen are solved.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a reflective flexible color display is provided, which comprises, from top to bottom:
a transparent flexible substrate (1) with a transparent electrode array (2) on the lower surface;
a polymer dispersed liquid crystal electro-optical layer (3);
a transparent organic insulating layer (5) and a metal nano-structure array (4) which is deposited and attached on the upper surface of the transparent organic insulating layer and is distributed in an array;
a transparent bottom electrode layer (6);
a transparent flexible substrate (7);
wherein the metal nano structure array (4) is obtained by arranging a plurality of metal nano cylinders with the reflectivity of more than 90 percent in a matrix manner, the diameter of the metal nano cylinder is 100-500nm, the height is 10-100nm, and the distance is 200-1000 nm. Preferably, the metal nanocylinders are aluminum or silver nanocylinders.
According to the scheme, the transparent flexible substrate (7) is a polymer film with the thickness of 10-500 mu m, and is preferably a PET film.
According to the scheme, the transparent bottom electrode layer (6) is an indium tin oxide conductive film or a graphene conductive film or an aluminum-doped zinc oxide conductive film or a metal nanowire conductive film, wherein the metal nanowire conductive film is selected from a silver nanowire conductive film, a copper nanowire conductive film, a gold nanowire conductive film, an aluminum nanowire conductive film and a nickel nanowire conductive film, and the thickness of the transparent bottom electrode layer is 100-500 nm.
According to the scheme, the transparent organic insulating layer (5) is a PDMS film (polydimethylsiloxane) or a PMMA film (polymethyl methacrylate), and the thickness is 10-100 nm.
According to the scheme, the raw material of the polymer dispersed liquid crystal photoelectric layer (3) consists of 49.7-67 wt% of nematic liquid crystal, 30-50 wt% of comonomer and 0.3-3 wt% of photoinitiator, and the thickness is 5-20 mu m. The response time of the polymer dispersed liquid crystal film under the action of an external electric field is less than 1ms, so that the color flexible display screen can realize dynamic display.
According to the scheme, the comonomer is at least one of ultraviolet curing optical cement NOA65, polyurethane acrylate, hydroxypropyl acrylate and methyl methacrylate.
According to the scheme, the photoinitiator is at least one of benzoin dimethyl ether and tolidine.
According to the scheme, the transparent flexible substrate (1) is a polymer film with the thickness of 10-500 mu m, and is preferably a PET film.
The invention also provides a preparation method of the reflection type color flexible display screen, which comprises the following specific steps:
1) sequentially depositing a transparent bottom electrode layer (6) and a transparent organic insulating layer (5) on a transparent flexible substrate (7) by adopting a thin film deposition method;
2) attaching the nano-pore template (8) to the transparent organic insulating layer (5), depositing a layer of metal on the nano-pore template (8) by adopting a thin film deposition method, then taking away the nano-pore template (8), and obtaining a metal nano-structure array (4) which is arranged in a matrix on the surface of the transparent organic insulating layer (5);
3) coating the polymer dispersed liquid crystal photoelectric layer (3) on the transparent organic insulating layer (5) by a coating method;
4) and (3) attaching a transparent flexible substrate (1) with a transparent electrode array (2) on the lower surface to the polymer dispersed liquid crystal photoelectric layer (3), and performing ultraviolet irradiation curing molding to obtain the reflective color flexible display screen.
According to the scheme, the nano holes (9) on the nano hole template (8) in the step 2) are arranged in a matrix.
According to the reflective color flexible display screen, the voltage is applied to the electrodes to enable the polymer dispersed liquid crystal photoelectric layer to be in an open state, natural light reaches the surface of the metal nano structure array with high visible light reflectivity and surface plasmon effect through the transparent flexible substrate, the transparent electrode array and the polymer dispersed liquid crystal photoelectric layer to be reflected, the metal nano structures with different sizes can enhance and reflect visible light with different wavelengths (colors), and color display is achieved while the display contrast is improved.
The invention has the beneficial effects that: 1. the reflective color flexible display screen provided by the invention deposits the metal nano structure with periodic array arrangement and high visible light reflectivity on the surface of the transparent organic insulating layer, the size and the cylinder spacing of the nano cylinders in the metal nano structure array can be designed to ensure that the metal nano structure array has the surface plasmon effect for enhancing specific spectrum, the reflection intensity of the visible light with different wavelengths is improved, thereby the display contrast is improved, the metal nano structure arrays with different sizes are arranged into RGB pixels, rich color display can be realized, simultaneously, a transparent bottom electrode layer is adopted, the natural light at the back bottom enters a reflection light path to enhance the display brightness, in addition, the metal nano structure also has the characteristic of selective reflection for the visible light with different incidence angles, the incidence angle of the light reaching the metal nano structure through the polymer dispersed liquid crystal photoelectric layer can be adjusted through the size of an electric field applied on the polymer dispersed liquid crystal photoelectric layer, therefore, visible light with different colors is reflected, and the colors of the flexible display screen can be further enriched. 2. The preparation method provided by the invention has simple steps and is easy to realize industrial production.
Drawings
FIG. 1 is a schematic view of a reflective color flexible display panel according to the present invention;
FIG. 2 is a schematic structural diagram of a nanopore template for use in metal nanostructure array fabrication according to the present invention;
FIG. 3 is a process flow of manufacturing a reflective flexible color display panel according to the present invention;
fig. 4 is a voltage-color relationship diagram of the reflective color flexible display module prepared in embodiment 1 of the present invention.
In the drawings: the liquid crystal display device comprises a 1-transparent flexible substrate, a 2-transparent electrode array, a 3-polymer dispersed liquid crystal photoelectric layer, a 4-metal nanostructure array, a 5-transparent organic insulating layer, a 6-transparent bottom electrode layer, a 7-transparent flexible substrate, an 8-nanopore template and a 9-nanopore.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings.
The invention provides a reflection-type color flexible display screen, which is structurally schematically shown in figure 1 and consists of a transparent flexible substrate 1 with a transparent electrode array 2 on the lower surface, a polymer dispersed liquid crystal photoelectric layer 3, a transparent organic insulating layer 5, a metal nano-structure array 4 deposited on the upper surface of the transparent organic insulating layer and distributed in an array manner, a transparent bottom electrode layer 6 and a transparent flexible substrate 7 from top to bottom. The metal nano structure array 4 is obtained by arranging a plurality of metal nano cylinders with the reflectivity of more than 90 percent in a matrix manner, wherein the diameter of the metal nano cylinder is 100-500nm, the height of the metal nano cylinder is 10-100nm, and the distance between the metal nano cylinders is 200-1000 nm. Preferably, the metal nanocylinders are aluminum or silver nanocylinders.
The invention provides a preparation method of the reflection-type color flexible display screen, the preparation process flow is shown in figure 3, and the preparation method comprises the following steps:
1. sequentially depositing a transparent bottom electrode layer 6 and a transparent organic insulating layer 5 on a transparent flexible substrate 7 by adopting a thin film deposition method;
2. attaching a nanopore template 8 (the schematic structure diagram is shown in fig. 2) to a transparent organic insulating layer 5, depositing a layer of metal with high visible light reflectivity on the nanopore template 8 by using a thin film deposition method, taking away the nanopore template 8, and forming a metal nanostructure array 4 in matrix arrangement on the surface of the transparent organic insulating layer 5 by the metal in the nanopores 9;
3. coating the polymer dispersed liquid crystal photoelectric layer 3 on the transparent organic insulating layer 5 and the metal nanostructure array 4 by a coating method;
4. and attaching the transparent flexible substrate 1 with the transparent electrode array 2 on the lower surface to the polymer dispersed liquid crystal photoelectric layer 3, and performing ultraviolet irradiation curing molding to obtain the reflective color flexible display screen.
The technical solutions of the present invention are further described below with reference to the drawings and specific examples, which should not be construed as limiting the present invention.
Example 1
A reflective color flexible display screen is prepared by the following steps:
1) depositing an indium tin oxide transparent conductive film with the thickness of 200nm on a PET film with the thickness of 0.2mm by adopting a radio frequency magnetron sputtering instrument, and coating a PDMS organic insulating layer with the thickness of 100nm on the indium tin oxide transparent conductive film by adopting a spin-coating method;
2) attaching a nanopore template (nanopores are arranged in a matrix) to a PDMS (polydimethylsiloxane) organic insulating layer, depositing an aluminum film with the thickness of 100nm on the nanopore template and the transparent organic insulating layer by adopting electron beam evaporation equipment, taking away the nanopore template, and forming an aluminum metal nanocylinder array with the diameter of 100nm-300nm and the distance of 240nm-680nm on the PDMS organic insulating layer;
3) mixing urethane acrylate and hydroxypropyl acrylate according to the proportion of 1: 2, mixing and stirring for 1 hour according to the mass ratio to prepare a transparent prepolymer monomer, adding nematic liquid crystal P0616A into the prepolymer monomer, wherein the mass parts of the nematic liquid crystal and the prepolymer monomer are 60 parts and 37 parts respectively, adding 3 parts by mass of photoinitiator benzoin dimethyl ether, fully stirring for 2 hours at 60 ℃ to form a transparent polymer dispersed liquid crystal solution, and then uniformly coating the polymer dispersed liquid crystal solution on a PDMS organic insulation layer and an aluminum metal nanostructure array by adopting a coating machine to form a 10 mu m thick polymer dispersed liquid crystal photoelectric layer;
4) a coating machine is utilized to flatly and tightly cover a PET substrate with the thickness of 0.2mm on the surface of the polymer dispersed liquid crystal photoelectric layer, an indium tin oxide transparent electrode array of a pixel driving circuit is arranged on the lower surface of the PET substrate, when the PET substrate is covered on the polymer dispersed liquid crystal photoelectric layer, the indium tin oxide transparent electrode array is contacted with the polymer dispersed liquid crystal photoelectric layer, the polymer dispersed liquid crystal photoelectric layer is irradiated by ultraviolet with the wavelength of 365nm for 15min at room temperature, and the intensity of the ultraviolet is 5mw/cm2And curing the polymer dispersed liquid crystal film and forming good adhesion with the PET transparent flexible substrate to obtain the required color flexible display screen.
The relationship between the voltage and the color of the prepared color flexible display screen display module is shown in figure 4.
Example 2
A reflective color flexible display screen is prepared by the following steps:
1) preparing a piece of PET film with the thickness of 0.1mm, cleaning and drying; depositing an aluminum-doped zinc oxide transparent conductive film with the thickness of 150nm on a PET film by adopting a radio frequency magnetron sputtering instrument, and coating a PMMA organic insulating layer with the thickness of 80nm on the aluminum-doped zinc oxide transparent conductive film by adopting a spin-coating method;
2) attaching the nanopore template to a PMMA (polymethyl methacrylate) organic insulating layer, depositing a 50nm thick silver film on the nanopore template and the transparent organic insulating layer by adopting electron beam evaporation equipment, taking away the nanopore template, leaving the silver film in the nanopore, and forming a silver metal nanocylinder array with the diameter of 120nm-360nm and the distance of 300nm-800nm on the PMMA organic insulating layer;
3) mixing 43%, 56% and 1% of ultraviolet curing optical adhesive NOA65, nematic phase liquid crystal P0616A and photoinitiator xylene ketone according to the mass percentage, fully stirring for 2 hours at 60 ℃ to form a transparent polymer dispersed liquid crystal solution, and then uniformly coating the polymer dispersed liquid crystal solution on a PMMA organic insulating layer and a silver metal nano cylindrical array by adopting a coating machine to form a polymer dispersed liquid crystal photoelectric layer with the thickness of 5 microns;
4) utilizing a coating machine to flatly and tightly cover a PET substrate with the thickness of 0.1mm on the surface of the polymer dispersed liquid crystal photoelectric layer, wherein the PET substrate is provided with an aluminum-doped zinc oxide transparent electrode array with the thickness of 100nm and a pixel driving circuit, when the PET substrate covers the polymer dispersed liquid crystal photoelectric layer, the aluminum-doped zinc oxide transparent electrode array is contacted with the polymer dispersed liquid crystal photoelectric layer, the polymer dispersed liquid crystal photoelectric layer is irradiated by ultraviolet rays with the wavelength of 365nm for 10min at room temperature, and the intensity of the ultraviolet rays is 8mw/cm2And curing the polymer dispersed liquid crystal film and forming good adhesion with the PET transparent flexible substrate to obtain the required color flexible display screen.
Claims (10)
1. A reflective flexible color display panel, comprising, from top to bottom:
a transparent flexible substrate (1) with a transparent electrode array (2) on the lower surface;
a polymer dispersed liquid crystal electro-optical layer (3);
a transparent organic insulating layer (5) and a metal nano-structure array (4) which is deposited and attached on the upper surface of the transparent organic insulating layer and is distributed in an array;
a transparent bottom electrode layer (6);
a transparent flexible substrate (7);
wherein the metal nano structure array (4) is obtained by arranging a plurality of metal nano cylinders with the reflectivity of more than 90 percent in a matrix manner, the diameter of the metal nano cylinder is 100-500nm, the height is 10-100nm, and the distance is 200-1000 nm.
2. A reflective color flexible display screen according to claim 1, characterized in that the transparent flexible substrate (7) is a polymer film with a thickness of 10-500 μm.
3. The reflective color flexible display screen according to claim 1, wherein the transparent bottom electrode layer (6) is an indium tin oxide conductive film or a graphene conductive film or an aluminum-doped zinc oxide conductive film or a metal nanowire conductive film, wherein the metal nanowire conductive film is selected from a silver nanowire conductive film, a copper nanowire conductive film, a gold nanowire conductive film, an aluminum nanowire conductive film, and a nickel nanowire conductive film, and the thickness of the transparent bottom electrode layer is 100-500 nm.
4. A reflective color flexible display screen according to claim 1, characterized in that the transparent organic insulating layer (5) is a PDMS or PMMA film with a thickness of 10-100 nm.
5. A reflective color flexible display screen according to claim 1, characterized in that the polymer dispersed liquid crystal electro-optical layer (3) is made of 49.7-67 wt% nematic liquid crystal, 30-50 wt% comonomer, 0.3-3 wt% photoinitiator and has a thickness of 5-20 μm.
6. The reflective color flexible display of claim 5, wherein said co-monomer is at least one of UV curable optical adhesive NOA65, urethane acrylate, hydroxypropyl acrylate, and methyl methacrylate.
7. The reflective color flexible display of claim 5, wherein said photoinitiator is at least one of benzoin dimethyl ether and tolidine.
8. A reflective color flexible display screen according to claim 1, characterized in that the transparent flexible substrate (1) is a polymer film with a thickness of 10-500 μm.
9. A method of manufacturing a reflective color flexible display according to any one of claims 1 to 8, comprising the steps of:
1) sequentially depositing a transparent bottom electrode layer (6) and a transparent organic insulating layer (5) on a transparent flexible substrate (7) by adopting a thin film deposition method;
2) attaching the nano-pore template (8) to the transparent organic insulating layer (5), depositing a layer of metal on the nano-pore template (8) by adopting a thin film deposition method, then taking away the nano-pore template (8), and obtaining a metal nano-structure array (4) which is arranged in a matrix on the surface of the transparent organic insulating layer (5);
3) coating the polymer dispersed liquid crystal photoelectric layer (3) on the transparent organic insulating layer (5) by a coating method;
4) and (3) attaching a transparent flexible substrate (1) with a transparent electrode array (2) on the lower surface to the polymer dispersed liquid crystal photoelectric layer (3), and performing ultraviolet irradiation curing molding to obtain the reflective color flexible display screen.
10. A method of manufacturing a reflective color flexible display screen according to claim 9, wherein the nano-holes (9) of the nano-hole template (8) of step 2) are arranged in a matrix.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114879390A (en) * | 2022-06-06 | 2022-08-09 | 南京信息工程大学 | Nanowire structure color display screen and manufacturing method thereof |
| CN115308962A (en) * | 2022-08-24 | 2022-11-08 | 中建材玻璃新材料研究院集团有限公司 | Preparation method of electrochromic glass with adjustable reflection spectrum |
| CN116068801A (en) * | 2023-03-02 | 2023-05-05 | 深圳市易快来科技股份有限公司 | High-reflectivity color reflective liquid crystal display screen and reflective display method |
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