WO2018072399A1 - 视角可切换智能显示膜的制备方法及含该显示膜的复合膜 - Google Patents

视角可切换智能显示膜的制备方法及含该显示膜的复合膜 Download PDF

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WO2018072399A1
WO2018072399A1 PCT/CN2017/078916 CN2017078916W WO2018072399A1 WO 2018072399 A1 WO2018072399 A1 WO 2018072399A1 CN 2017078916 W CN2017078916 W CN 2017078916W WO 2018072399 A1 WO2018072399 A1 WO 2018072399A1
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Prior art keywords
viewing angle
layer
film
liquid crystal
smart display
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PCT/CN2017/078916
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English (en)
French (fr)
Inventor
贺泽民
余国策
宋维伟
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北京佳视智晶光电科技有限公司
天津佳视智晶光电科技有限公司
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Priority claimed from CN201621138713.5U external-priority patent/CN206096691U/zh
Priority claimed from CN201610912621.6A external-priority patent/CN106632883B/zh
Application filed by 北京佳视智晶光电科技有限公司, 天津佳视智晶光电科技有限公司 filed Critical 北京佳视智晶光电科技有限公司
Priority to US16/342,098 priority Critical patent/US20190258097A1/en
Publication of WO2018072399A1 publication Critical patent/WO2018072399A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1811—C10or C11-(Meth)acrylate, e.g. isodecyl (meth)acrylate, isobornyl (meth)acrylate or 2-naphthyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/10—Esters
    • C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
    • C08F222/102—Esters of polyhydric alcohols or polyhydric phenols of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
    • C09K19/542—Macromolecular compounds
    • C09K19/544—Macromolecular compounds as dispersing or encapsulating medium around the liquid crystal
    • 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
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • 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
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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
    • G02F1/133502—Antiglare, refractive index matching layers
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the invention relates to a preparation method of a viewing angle switchable intelligent display film and a composite film containing the same, which are applied to optical display fields such as smart phones and flat panel displays.
  • Liquid crystal display technology is currently a dominant flat panel display technology. After years of development, the liquid crystal display technology has been continuously improved, and the key indicators such as resolution, brightness, and viewing angle of the liquid crystal display have been greatly improved. In particular, wide viewing angle technology has been widely used in liquid crystal displays. In the field of display technology, when different people have different requirements on the viewing angle width when displaying information on a liquid crystal display device, one can use a liquid crystal display having a narrow viewing angle to realize confidentiality during liquid crystal display, and use a liquid crystal display device having a wide viewing angle. To meet the requirements of multiple people and multiple angles to simultaneously view the display information of the liquid crystal display device.
  • a viewing angle that is narrow in perspective to achieve an anti-spyware function can switch products.
  • the director backlight technology can realize switching between wide and narrow viewing angles, but the technology has extremely high requirements on the manufacture of the light guide plate and the LED lighting bar, and it is difficult for the general backlight manufacturer to meet the design requirements.
  • the object of the present invention is to provide a method for preparing a viewing angle switchable intelligent display film, which has high light transmittance, low voltage driving and display film application characteristics under a wide viewing angle condition under the premise of ensuring electro-optic characteristics of the film material. Switching between a wide viewing angle and a narrow viewing angle in a display state is achieved.
  • a method for preparing a view switchable smart display film comprising the steps of:
  • the liquid crystal and the photopolymerizable monomer are mixed according to the percentage, and the raw material ratio is selected according to the refractive index matching of the conductive film and the polymer dispersed liquid crystal layer and the material composition characteristics, wherein the percentage of the liquid crystal is 30-60. %, the percentage of photopolymerizable monomer is 38-70%, the percentage of photoinitiator is 0.1-3.5%, the percentage of spacer is 0.1-5%; liquid crystal, photopolymerizable monomer
  • the photoinitiator and the spacer are uniformly stirred at room temperature, and the mixture is extruded into two conductive films coated with indium tin oxide by a rolling process to form a thin layer of 100 ⁇ m thick, and the light is used at 25 ° C.
  • the ultraviolet light having a intensity of 10 mW/cm 2 was irradiated for 5 to 10 minutes to prepare a viewing angle switchable smart display film.
  • the viewing angle switchable smart display film of the present invention has a wide viewing angle in a non-energized state and a narrow viewing angle in an energized state, and adjustment between a wide viewing angle and a narrow viewing angle can be achieved by adjusting the applied voltage.
  • the liquid crystal is a nematic liquid crystal having a refractive index of between 1.4 and 1.52.
  • the photopolymerizable monomer is a photopolymerizable monomer having a refractive index of between 1.4 and 1.52.
  • the photopolymerizable monomer comprises hydroxypropyl acrylate, hydroxypropyl methacrylate, lauryl acrylate, lauryl methacrylate, isobornyl acrylate, isobornyl methacrylate, 1,6- Hexanediol diacrylate, ethylphenoxy acrylate, ethylphenoxy methacrylate, 3,3,5-trimethylcyclohexyl acrylate, benzyl methacrylate, hexyl acrylate, Hexyl methacrylate, polyethylene glycol diacrylate, ethoxylated double One or more components of phenol A dimethacrylate.
  • the indium tin oxide-plated conductive film has a refractive index between 1.46 and 1.52, and the polymer dispersed liquid crystal layer and the conductive film have similar refractive indices.
  • the spacer has a particle diameter of 2 to 10 ⁇ m.
  • the viewing angle can switch the driving voltage AC 0 ⁇ 10V of the smart display film, the film thickness is 100 ⁇ m, the wide viewing angle transmittance is ⁇ 76%, and the narrow viewing angle transmittance is ⁇ 88%.
  • the viewing angle switchable smart display film can switch between a wide viewing angle state and a narrow viewing angle state in a change of an applied electric field, and a display state can be realized between the backlight module and the display module. Switching between wide viewing angle and narrow viewing angle.
  • the viewing angle switchable smart display film has an adjustable refractive index and has compatibility with other optical display films in the display backlight module.
  • the polymer dispersed liquid crystal in the viewable switchable smart display film of the invention is a photoelectric response material, and the liquid crystal droplets are uniformly dispersed in the polymer matrix in the view switchable film, and the viewing angle switchable film is completed by the applied electric field.
  • the mutual conversion between the unpowered wide viewing angle and the power-applied narrow viewing angle, and the main feature of the viewing angle switchable film is that the film transmittance can reach 76% or more at a wide viewing angle, without affecting the overall performance of the display backlight module.
  • the light transmittance is as high as 88% or more at a narrow viewing angle.
  • the angle of view switching angle can be up to ⁇ 15° at narrow viewing angles and wide viewing angles, and has a high transmittance, ultra-thin viewing angle switchable film in a wide viewing angle state.
  • Another object of the present invention is to provide a composite film with a viewing angle switchable smart display film, which can realize high transmittance, low voltage driving and display film application under a wide viewing angle under the premise of ensuring electro-optic characteristics of the film material.
  • the feature enables switching between a wide viewing angle and a narrow viewing angle in a display state.
  • a composite film comprising a viewing angle switchable smart display film, the composite film structure comprising: a first release protective film layer 100 disposed from top to bottom, an anti-glare coating layer 101, a first PET layer 102, and a first Indium tin oxide conductive layer 103, polymer dispersed liquid crystal layer 104, second indium tin oxide conductive layer 105, second PET layer 106, optical grade adhesive layer 107, ultrafine louver layer 108, third PET layer 109, and second The release protective film layer 110.
  • a self-adhesive layer 111 is disposed between the third PET layer 109 and the second release protective film layer 110.
  • the anti-glare coating can reduce specular reflection to achieve an anti-glare effect.
  • the liquid crystal in the polymer dispersed liquid crystal layer is a nematic liquid crystal
  • the polymer is an acrylate monomer
  • the polymer dispersed liquid crystal layer is polymerized by nematic liquid crystal and acrylate monomer by 365 nm UV illumination.
  • the adjustable viewing angle can switch the transmittance and the viewing angle range of the smart display composite film.
  • the ultra-fine louver layer forms a narrow viewing angle display effect of ⁇ 30 degrees after light is transmitted.
  • the view angle switchable smart display composite film can switch between a wide viewing angle and a narrow viewing angle, and has a wide viewing angle in a non-energized state, a viewing angle size of ⁇ 60 degrees; a narrow viewing angle in a powered state, a viewing angle The size is ⁇ 30 degrees; by adjusting the applied voltage, the film can be adjusted between a wide viewing angle and a narrow viewing angle.
  • the first PET layer, the second PET layer, the first indium tin oxide layer and the second indium tin oxide layer and the polymer dispersed liquid crystal layer have similar refractive indices, and are all between 1.45 and 1.5.
  • the first PET layer, the second PET layer, the first indium tin oxide layer and the second indium tin oxide layer correspond to the viewing angle switchable smart display film prepared by the present invention.
  • the viewing angle switchable smart display composite film has an adjustable refractive index as a whole, and has compatibility with other optical display films in the display backlight module.
  • the viewing angle can switch the driving voltage AC 0 ⁇ 10V of the intelligent display composite film, the film thickness is 500-600 ⁇ m, the light transmittance of the wide viewing angle state can reach more than 75%, and the light transmittance of the narrow viewing angle state can reach 90%.
  • the film thickness is 500-600 ⁇ m
  • the light transmittance of the wide viewing angle state can reach more than 75%
  • the light transmittance of the narrow viewing angle state can reach 90%.
  • the polymer dispersed liquid crystal in the viewable switchable intelligent display composite film of the invention is a photoelectric response material, and the liquid crystal droplets are uniformly dispersed in the polymer matrix in the view switchable film, and the viewing angle switchable film is completed under the action of an applied electric field.
  • the mutual conversion between the unpowered wide viewing angle and the energized narrow viewing angle achieves the requirement of high transmittance and ultra-thin viewing angle switchability in a wide viewing angle state.
  • Example 1 is a voltage-transmittance electro-optic characteristic curve of a viewing angle switchable smart display film prepared in Example 1.
  • FIG. 2 is a view-brightness curve of the viewing angle switchable smart display film prepared in Embodiment 1 in a display backlight module.
  • FIG. 3 is a view-brightness curve of a viewing angle switchable smart display film composite anti-spy film prepared in Embodiment 1 in a display backlight module.
  • FIG. 4 is a view-brightness curve of the viewing angle switchable smart display film prepared in Embodiment 2 in the display backlight module.
  • FIG. 5 is a view-luminance curve of the viewing angle switchable smart display film composite anti-spy film prepared in Embodiment 2 in the display backlight module.
  • FIG. 6 is a view-brightness curve of the viewing angle switchable smart display film prepared in Embodiment 3 in a display backlight module.
  • FIG. 7 is a schematic diagram of a wide viewing angle and a narrow viewing angle mode of a view switchable smart display film.
  • FIG. 8 is a cross-sectional structural view of a viewing angle switchable smart display composite film of Example 4.
  • FIG. 9 is a schematic diagram showing the structure of a wide and narrow viewing angle mode of the viewing angle switchable intelligent display composite film of Embodiment 4.
  • FIG. 10 is a perspective-luminance curve of the viewing angle switchable smart display composite film of Embodiment 4 in a display backlight module.
  • FIG. 11 is a cross-sectional structural view of a viewing angle switchable smart display composite film of Example 5.
  • FIG. 12 is a perspective view of a viewing angle switchable smart display composite film of Embodiment 5 in a display backlight module. line.
  • 100 a first release protective film layer; 101, an anti-glare coating; 102, a first PET layer; 103, a first indium tin oxide conductive layer; 104, a polymer dispersed liquid crystal layer; 105, a second indium tin oxide conductive a layer; 106, a second PET layer; 107, an optical grade adhesive layer; 108, an ultrafine louver layer; 109, a third PET layer; 110, a second release protective film layer; 111, a self-adhesive layer.
  • the liquid crystal and the photopolymerizable monomer were mixed according to the percentage.
  • the refractive index of the transparent ITO conductive film was 1.47, and the refractive index of the nematic liquid crystal SLC1717 (Shijiazhuang Yongsheng Huaqing Liquid Crystal Co., Ltd.) was 1.512, wherein the liquid crystal content was total.
  • photopolymerizable monomer selected polyethylene oxide diacrylate having a refractive index of 1.47, 1,6-hexanediol diacrylate having a refractive index of 1.456, and hydroxypropyl methacrylate having a refractive index of 1.447
  • the mixture of esters has a mass ratio of 3:4:3, a photopolymerizable monomer content of 69.5%, a photoinitiator content of 0.4%, and a glass microbead having a particle diameter of 10 ⁇ m as a spacer having a content of 0.1.
  • the liquid crystal, photopolymerizable monomer, photoinitiator and glass microbeads were uniformly stirred at room temperature, and the mixture was extruded into two conductive films coated with indium tin oxide by a rolling process to form a thickness of 100 ⁇ m.
  • the thin layer was irradiated with ultraviolet light having a light intensity of 10 mW/cm 2 and a wavelength of 365 nm for 5 minutes at 25 ° C to prepare a viewing angle switchable smart display film.
  • the viewing angle obtained by the above preparation method can switch the smart display film, and the thickness thereof is 100 micrometers measured by a micrometer, and the voltage-transmittance electro-optic characteristic curve is as shown in FIG. 1. As the voltage increases, the transmittance thereof increases.
  • the light transmittance in the wide viewing angle state is 76%
  • the light transmittance in the narrow viewing angle state is 88%
  • the driving voltage can be as low as 10V.
  • the viewing angle can be switched to switch the intelligent display film, and the viewing angle-brightness curve is as shown in FIG. 2, and the viewing angle has a certain change with the change of the driving voltage, and the effect of the viewing angle adjustment is obtained.
  • the viewing angle can switch the anti-spy film with the composite refractive index of 1.5
  • the viewing angle-luminance curve is measured in the liquid crystal display backlight module as shown in FIG. 3, and the viewing angle can be switched intelligently with the change of the driving voltage.
  • the membrane acts as a wide viewing angle and narrow viewing angle switching.
  • the liquid crystal and the photopolymerizable monomer are mixed according to a percentage.
  • the transparent ITO conductive film has a refractive index of 1.47 and a thickness of 50 ⁇ m
  • the nematic liquid crystal SLC1717 (Shijiazhuang Yongsheng Huaqing Liquid Crystal Co., Ltd.) has a refractive index of 1.512, wherein The content of the liquid crystal is 45% of the total mass
  • the photopolymerizable monomer is selected from polyethylene glycol diacrylate having a refractive index of 1.47, isobornyl methacrylate having a refractive index of 1.477, and hydroxy methacrylate having a refractive index of 1.447.
  • the liquid crystal, the photopolymerizable monomer, the photoinitiator and the glass microbead are uniformly stirred at room temperature, and the mixture is extruded into two conductive films coated with indium tin oxide by a rolling process to form a thin layer of 100 ⁇ m thick.
  • the viewing angle switchable smart display film was prepared by irradiating ultraviolet light having a light intensity of 10 mW/cm 2 at a wavelength of 365 nm for 5 minutes at 25 ° C.
  • the viewing angle obtained by the above preparation method can switch the smart display film, and the thickness thereof is measured by using a micrometer, and the transmittance thereof is continuously increased with the increase of the voltage, and the transmittance of the wide viewing angle is 78%, and the narrow viewing angle is transparent.
  • the light rate is 88% and the driving voltage can be as low as 8V.
  • a viewing angle can be switched to switch the smart display film, and the viewing angle-brightness curve is as shown in FIG. 4.
  • the driving voltage changes, the viewing angle thereof has a certain change, and the viewing angle is adjusted.
  • the viewing angle can switch the anti-spy film with the composite refractive index of 1.5, the viewing angle-luminance curve is measured in the liquid crystal display backlight module as shown in FIG. 5, and the viewing angle can be switched intelligently with the change of the driving voltage.
  • the membrane acts as a wide viewing angle and narrow viewing angle switching.
  • the liquid crystal and the photopolymerizable monomer are mixed according to a percentage.
  • the transparent ITO conductive film has a refractive index of 1.47 and a thickness of 50 ⁇ m
  • the nematic liquid crystal SLC1717 (Shijiazhuang Yongsheng Huaqing Liquid Crystal Co., Ltd.) has a refractive index of 1.512, wherein The content of the liquid crystal is 60% of the total mass
  • the photopolymerizable monomer is selected from polyethylene glycol diacrylate having a refractive index of 1.47, 1,6-hexanediol diacrylate having a refractive index of 1.456, and a refractive index of 1.458.
  • the liquid crystal, photopolymerizable monomer, photoinitiator and glass microbeads were uniformly stirred at room temperature, and the mixture was extruded into two conductive films coated with indium tin oxide by a rolling process to form a thickness of 100 ⁇ m.
  • the thin layer was irradiated with ultraviolet light having a light intensity of 10 mW/cm 2 and a wavelength of 365 nm for 5 minutes at 25 ° C to prepare a viewing angle switchable smart display film.
  • the viewing angle obtained by the above preparation method can switch the smart display film, and the thickness thereof is measured by a micrometer, and the transmittance thereof is continuously increased with the increase of the voltage, and the transmittance of the wide viewing angle is 80%, and the narrow viewing angle is transparent.
  • the light rate is 90%
  • the driving voltage can be as low as 6V, and the effect of wide viewing angle and narrow viewing angle switching is achieved.
  • a viewing angle can be switched to switch the smart display film, and the viewing angle-brightness curve is as shown in FIG. 6.
  • the driving voltage changes, the viewing angle thereof has a certain change, and the viewing angle adjustment effect is obtained.
  • 7 is a schematic diagram of a wide viewing angle and a narrow viewing angle mode of a view switchable smart display film.
  • Fig. 8 is a cross-sectional structural view showing the viewing angle switchable intelligent display composite film of the present embodiment.
  • the composite film includes: a first release protective film layer 100, an anti-glare coating layer 101, a first PET layer 102, a first indium tin oxide conductive layer 103, a polymer dispersed liquid crystal layer 104, and a first Indium tin oxide conductive layer 105, second PET layer 106, optical grade adhesive layer 107, ultrafine louver layer 108, third PET layer 109 and second release protective film layer 110; antiglare coating 101 is disposed at first Below the release protective film layer 100, the first PET layer 102 is disposed under the anti-glare coating 101, the first indium tin oxide conductive layer 103 is disposed under the first PET layer 102, and the polymer dispersed liquid crystal layer 104 is disposed under Under the first indium tin oxide conductive layer 103, the polymer liquid crystal layer comprises liquid crystal droplets, and the polymer dispersed liquid crystal
  • the backlight light passes through the ultrafine louver layer 108 to form a narrow viewing angle, and then enters the polymer dispersed liquid crystal layer 104, and is uniformly dispersed by the light scattering of the liquid crystal layer, so that the transmitted light has a wide viewing angle mode.
  • the backlight light passes through the ultra-fine louver layer 108 to form a narrow viewing angle, and the light enters the polymer dispersed liquid crystal layer 104, and is directly transmitted without being scattered by the liquid crystal layer, and has a narrow viewing angle mode.
  • the schematic diagram of the wide and narrow viewing angle mode with the viewing angle switchable intelligent display composite film is shown in Fig. 9.
  • the composite display film can be switched with a viewing angle, and the thickness thereof is 500 micrometers measured by a micrometer. As the voltage increases, the transmittance increases continuously, and the light transmittance in the light scattering state is 78%, and the transmittance in the transparent state is 78%. 92%, the drive voltage can be as low as 8V.
  • a smart display composite film with a viewing angle is added, and the viewing angle-brightness curve is as shown in FIG. 10.
  • the intelligent display composite film with the viewing angle can be switched to have a wide viewing angle and a narrow viewing angle. The effect of the switch.
  • FIG. 11 is a cross-sectional structural view showing a self-adhesive view switchable smart display composite film according to the embodiment.
  • the film includes: a first release protective film layer 100, an anti-glare coating 101, a first PET layer 102, a first indium tin oxide conductive layer 103, a polymer dispersed liquid crystal layer 104, and a second Indium tin oxide conductive layer 105, second PET layer 106, optical grade adhesive layer 107, ultrafine louver layer 108, third PET layer 109, second release protective film layer 110, and self-adhesive layer 111.
  • the anti-glare coating 101 is disposed under the first release protective film layer 100, the first PET layer 102 is disposed under the anti-glare coating 101, and the first indium tin oxide conductive layer 103 is disposed under the first PET layer 102.
  • the polymer dispersed liquid crystal layer 104 is disposed under the first indium tin oxide conductive layer 103, the polymer liquid crystal layer includes liquid crystal droplets, and the polymer dispersed liquid crystal layer is composed of nematic liquid crystal and acrylate monomer via 365 nm UV Polymerized;
  • the second indium tin oxide conductive layer 105 is disposed under the polymer dispersed liquid crystal layer 104, the second PET layer 106 is disposed under the second indium tin oxide conductive layer 105, and the optical grade adhesive layer 107 is disposed in the second Below the PET layer 106, the ultrafine louver layer 108 is disposed under the optical grade adhesive layer 107, the third PET layer 109 is disposed under the ultrafine louver layer
  • the backlight light passes through the ultrafine louver layer 108 to form a narrow viewing angle, and then enters the polymer dispersed liquid crystal layer 104, and is uniformly dispersed by the light scattering of the liquid crystal layer, so that the transmitted light has a wide viewing angle mode.
  • the backlight light passes through the ultra-fine louver layer 108 to form a narrow viewing angle, and the light enters the polymer dispersed liquid crystal layer 104, and is directly transmitted without being subjected to light scattering by the liquid crystal layer, and has a narrow viewing angle mode.
  • the viewing angle of the switchable intelligent display composite film substrate has a refractive index of 1.52
  • the polymer dispersed liquid crystal layer has a refractive index of 1.50
  • the overall refractive index matches the backlight module optical film
  • the refractive index of the viewing angle switchable film can be adjusted by raw material selection.
  • the thickness of the micrometer is 600 micrometers.
  • the liquid crystal display backlight module a smart display composite film with a viewing angle is added, and the viewing angle-luminance curve is as shown in FIG. 12, and the viewing angle has a certain change as the driving voltage changes, and the viewing angle is adjusted.
  • the viewing angle-brightness curve measured in the liquid crystal display backlight module is shown in Fig. 12. With the change of the driving voltage, the intelligent display composite film with the viewing angle switchable has the effect of wide viewing angle and narrow viewing angle switching.
  • the invention provides a viewing angle switchable intelligent display film, the refractive index of which has adjustability, matching with other optical display films in the display backlight module, no effect on the display backlight effect, and good display Features, can be applied to optical display fields such as computers, smart phones, ATM displays.

Abstract

视角可切换智能显示膜的制备方法及含该显示膜的复合膜，所述制备方法包括如下步骤：将液晶和可光聚合单体按照百分含量进行混合，原料配比依据导电薄膜和聚合物分散液晶层的折射率匹配性以及物料组分特性进行选择，其中液晶的百分含量为30～60％，可光聚合单体的百分含量为38～70％，光引发剂的百分含量为0.1～3.5％，间隔子的百分含量为0.1～5％；将液晶、可光聚合单体、光引发剂和间隔子室温下搅拌均匀，利用滚压工艺将混合物料挤压在两片镀有氧化铟锡的导电薄膜中，形成薄层，使用紫外光照射5-10分钟，制备获得视角可切换智能显示膜。所述膜在外加电场下，可在宽视角态和窄视角态之间进行切换，可应用于计算机、智能手机和ATM显示屏等光学显示领域。

Description

视角可切换智能显示膜的制备方法及含该显示膜的复合膜 技术领域
本发明涉及一种视角可切换智能显示膜的制备方法及含该显示膜的复合膜，应用于智能手机、平板显示等光学显示领域。
背景技术
液晶显示技术是目前占主导地位的一种平板显示技术。经过多年的发展，液晶显示技术不断进步，液晶显示的分辨率、亮度、视角等关键指标都获得了极大的提升。特别是广视角技术基本已在液晶显示中普及。在显示技术领域，在不同场合下人们对液晶显示装置显示信息时视角宽度的要求不同，人们可以利用具有窄视角的液晶显示来实现液晶显示时的保密性，而利用具有宽视角的液晶显示装置来满足多人多角度同时观看液晶显示装置显示信息的要求。虽然广视角对液晶显示非常重要，但在某些应用场合，例如取款、密码输入、观看私人信息等，广视角特性却无法兼顾私密性，因此迫切需要一种能够按照使用场合和使用者需要调节视角宽窄从而实现防窥功能的视角可切换产品。
目前在液晶显示技术中，指向矢背光技术可实现宽窄视角的切换，但该技术对导光板的制作及光条(LED lighting Bar)的要求极高，一般背光制造商较难满足设计要求。
现有CN 205405002 U、CN 103605237 B、CN 204790254 U等专利技术都有披露视角可切换扩散片在液晶显示中的应用，但具有液晶显示视角可切换扩散片的制备方法还未有技术披露。现有技术中不能在同一个液晶显示装置中实现宽视角与窄视角之间的切换，不能满足使用者对液晶显示装置多样化显示的需求。
发明内容
本发明的目的是提供一种视角可切换智能显示膜的制备方法，在保证薄膜材料电光特性的前提下，实现在宽视角状态下具有高透光率、低电压驱动和显示膜应用特性，可以实现显示状态下的宽视角与窄视角之间的切换。
为达到上述目的，本发明采用了如下的技术方案：
一种视角可切换智能显示膜的制备方法，所述制备方法包括如下步骤：
将液晶和可光聚合单体按照百分含量进行混合，原料配比依据导电薄膜和聚合物分散液晶层的折射率匹配性以及物料组分特性进行选择，其中液晶的百分含量为30～60％，可光聚合单体的百分含量为38～70％，光引发剂的百分含量为0.1～3.5％，间隔子的百分含量为0.1～5％；将液晶、可光聚合单体、光引发剂和间隔子室温下搅拌均匀，利用滚压工艺将混合物料挤压在两片镀有氧化铟锡的导电薄膜中，形成100微米厚的薄层，在25℃条件下，使用光强为10mw/cm2的紫外光照射5-10分钟，制备获得视角可切换智能显示膜。
本发明所述的视角可切换智能显示膜在不通电状态下为宽视角，在通电状态下为窄视角，通过外加电压大小的调节，可达到在宽视角和窄视角之间的调节。
优选地，所述的液晶为折射率在1.4～1.52之间的向列型液晶。
优选地，所述的可光聚合单体为折射率在1.4～1.52之间的可光聚合单体。
优选地，所述的可光聚合单体包括丙烯酸羟丙酯、甲基丙烯酸羟丙酯、丙烯酸月桂酯、甲基丙烯酸月桂酯、丙烯酸异冰片酯、甲基丙烯酸异冰片酯、1，6-己二醇二丙烯酸酯、乙基苯氧基丙烯酸酯、乙基苯氧基甲基丙烯酸酯、3，3，5-三甲基环己基丙烯酸酯、甲基丙烯酸苄基酯、丙烯酸己酯、甲基丙烯酸己酯、聚乙二醇二丙烯酸酯，乙氧基化双 酚A二甲基丙烯酸酯中的一种或多种组分。
优选地，所述的镀有氧化铟锡的导电薄膜折射率在1.46-1.52之间，聚合物分散液晶层和导电薄膜的折射率相近。
优选地，所述的间隔子的粒径为2-10μm。
优选地，所述的视角可切换智能显示膜的驱动电压AC 0～10V，膜厚度为100μm，宽视角态透光率≥76％，窄视角态透光率≥88％。
优选地，所述的视角可切换智能显示膜可在外加电场的变化中，可完成宽视角态和窄视角态之间进行切换，在背光模组和显示模组之间，可以实现显示状态在宽视角与窄视角之间的切换。
优选地，所述的视角可切换智能显示膜的折射率具有可调整性，和显示背光模组中其它光学显示膜具有匹配性。
本发明的视角可切换智能显示膜中聚合物分散液晶是一种光电响应材料，在视角可切换膜中液晶微滴均匀分散在聚合物基体中，在外加电场作用下，视角可切换膜完成由不加电的宽视角到加电的窄视角之间的相互转换，并且视角可切换膜的主要特点是在宽视角时膜透光率可达76％以上，不影响显示器背光模组的整体能耗，在窄视角时透光率高达88％以上。窄视角和宽视角下的视角切换角度可达±15°，在宽视角状态下具有高透光率、超薄的视角可切换膜。
本发明的另一个目的是提供一种含视角可切换智能显示膜的复合膜，在保证薄膜材料电光特性的前提下，实现在宽视角状态下具有高透光率、低电压驱动和显示膜应用特性，可以实现显示状态下的宽视角与窄视角之间的切换。
为达到上述目的，本发明采用了如下的技术方案：
一种含视角可切换智能显示膜的复合膜，所述复合膜的结构包括：自上而下依次设置的第一离型保护膜层100、防眩光涂层101、第一PET层102、第一氧化铟锡导电层103、聚合物分散液晶层104、第二氧化铟锡导电层105、第二PET层106、光学级胶层107、超微细百叶窗层108、第三PET层109和第二离型保护膜层110。
进一步地，所述第三PET层109和第二离型保护膜层110之间设置自粘层111。
优选地，所述的防眩光涂层可以减少镜面反射，达到防眩光的效果。
优选地，所述的聚合物分散液晶层中的液晶为向列型液晶，聚合物是丙烯酸酯单体，聚合物分散液晶层由向列型液晶和丙烯酸酯单体经365nm UV光照聚合而成。在外加电场下，可调整视角可切换智能显示复合膜的透光率和可视视角范围。
优选地，所述的超微细百叶窗层，光线透过之后形成±30度窄视角显示效果。
优选地，所述的视角可切换智能显示复合膜可在宽视角和窄视角之间进行切换，在不通电状态下为宽视角，视角大小为±60度；在通电状态下为窄视角，视角大小为±30度；通过调节外加电压大小，进而可使膜在宽视角和窄视角之间的进行调节。
优选地，所述的第一PET层、第二PET层、第一氧化铟锡层和第二氧化铟锡层以及聚合物分散液晶层的折射率相近，均在1.45-1.5之间。
本发明中，所述的第一PET层、第二PET层、第一氧化铟锡层和第二氧化铟锡层相当于本发明所制备的视角可切换智能显示膜。
优选地，所述的视角可切换智能显示复合膜整体的折射率具有可调整性，和显示背光模组中其它光学显示膜具有匹配性。
优选地，所述的视角可切换智能显示复合膜的驱动电压AC 0～10V，膜厚度为500-600μm，宽视角态透光率可达75％以上，窄视角态透光率可达90％以上，具有良好 的显示特性，可应用于计算机、智能手机和ATM显示屏等光学显示领域。
本发明的视角可切换智能显示复合膜中聚合物分散液晶是一种光电响应材料，在视角可切换膜中液晶微滴均匀分散在聚合物基体中，在外加电场作用下，视角可切换膜完成由不加电的宽视角到加电的窄视角之间的相互转换，可达到在宽视角状态下具有高透光率、超薄的视角可切换的需求。
附图说明
图1为实施例1制备的视角可切换智能显示膜的电压-透过率电光特性曲线。
图2为实施例1制备的视角可切换智能显示膜在显示背光模组中的视角-亮度曲线。
图3为实施例1制备的视角可切换智能显示膜复合防窥膜在显示背光模组中的视角-亮度曲线。
图4为实施例2制备的视角可切换智能显示膜在显示背光模组中的视角-亮度曲线。
图5为实施例2制备的视角可切换智能显示膜复合防窥膜在显示背光模组中的视角-亮度曲线。
图6为实施例3制备的视角可切换智能显示膜在显示背光模组中的视角-亮度曲线。
图7为视角可切换智能显示膜的宽视角和窄视角模式原理图。
图8为实施例4的含视角可切换智能显示复合膜的剖面结构图。
图9为实施例4的含视角可切换智能显示复合膜的宽窄视角模式结构原理图。
图10为实施例4的含视角可切换智能显示复合膜在显示背光模组中的视角-亮度曲线。
图11为实施例5的含视角可切换智能显示复合膜的剖面结构图。
图12为实施例5的含视角可切换智能显示复合膜在显示背光模组中的视角-亮度曲 线。
附图标记：
100、第一离型保护膜层；101、防眩光涂层；102、第一PET层；103、第一氧化铟锡导电层；104、聚合物分散液晶层；105、第二氧化铟锡导电层；106、第二PET层；107、光学级胶层；108、超微细百叶窗层；109、第三PET层；110、第二离型保护膜层；111、自粘层。
具体实施方式
以下实施例将有助于本领域的技术人员进一步理解本发明，但不以任何形式限制本发明。应当指出的是，对本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。下面结合附图及具体实施方式对本发明进行详细说明。
实施例1：
将液晶和可光聚合单体按照百分含量进行混合，透明ITO导电薄膜的折射率为1.47，向列型液晶SLC1717(石家庄永生华清液晶有限公司)折射率为1.512，其中液晶的含量为总质量的30％，可光聚合单体选择折射率为1.47的聚乙二醇二丙烯酸酯、折射率为1.456的1，6-己二醇二丙烯酸酯、折射率为1.447的甲基丙烯酸羟丙酯的混合物，质量比为3∶4∶3，可光聚合单体的含量为69.5％，光引发剂的含量为0.4％，选择粒径为10μm的玻璃微珠作为间隔子，其含量为0.1％；将液晶、可光聚合单体、光引发剂和玻璃微珠在室温下搅拌均匀，利用滚压工艺将混合物料挤压在两片镀有氧化铟锡的导电薄膜中，形成100微米厚的薄层，在25℃条件下，使用光强为10mw/cm2的波长为365nm的紫外光照射5分钟，制备获得视角可切换智能显示膜。
通过上述制备方法获得的视角可切换智能显示膜，利用千分尺测得其厚度为100微米，其电压-透过率电光特性曲线如图1所示，随着电压的增加，其透过率不断增加，宽视角态透光率为76％，窄视角态透光率为88％，驱动电压可低至10V。
在液晶显示背光模组中加入视角可切换智能显示膜，其视角-亮度曲线如图2所示，随着驱动电压的变化，其可视视角具有一定的变化，具有视角调整的效果。当视角可切换智能显示膜复合折射率为1.5的防窥膜之后，在液晶显示背光模组中测得其视角-亮度曲线如图3所示，随着驱动电压的变化，视角可切换智能显示膜起到了宽视角和窄视角切换的作用效果。
实施例2：
将液晶和可光聚合单体按照百分含量进行混合，透明ITO导电薄膜的折射率为1.47，厚度为50微米，向列型液晶SLC1717(石家庄永生华清液晶有限公司)折射率为1.512，其中液晶的含量为总质量的45％，可光聚合单体选择折射率为1.47的聚乙二醇二丙烯酸酯、折射率为1.477的甲基丙烯酸异冰片酯、折射率为1.447的甲基丙烯酸羟丙酯的混合物，质量比为3∶6∶1，可光聚合单体的含量为46.5％，光引发剂的含量为3.5％，选择粒径为5μm的间隔子，其含量为5％；将液晶、可光聚合单体、光引发剂和玻璃微珠在室温下搅拌均匀，利用滚压工艺将混合物料挤压在两片镀有氧化铟锡的导电薄膜中，形成100微米厚的薄层，在25℃条件下，使用光强为10mw/cm2的波长为365nm的紫外光照射5分钟，制备获得视角可切换智能显示膜。
通过上述制备方法获得的视角可切换智能显示膜，利用千分尺测得其厚度为100微米，随着电压的增加，其透过率不断增加，宽视角态透光率为78％，窄视角态透光率为88％，驱动电压可低至8V。
在液晶显示背光模组中加入视角可切换智能显示膜，其视角-亮度曲线如图4所示，随着驱动电压的变化，其可视视角具有一定的变化，具有视角调整的效果。当视角可切换智能显示膜复合折射率为1.5的防窥膜之后，在液晶显示背光模组中测得其视角-亮度曲线如图5所示，随着驱动电压的变化，视角可切换智能显示膜起到了宽视角和窄视角切换的作用效果。
实施例3：
将液晶和可光聚合单体按照百分含量进行混合，透明ITO导电薄膜的折射率为1.47，厚度为50微米，向列型液晶SLC1717(石家庄永生华清液晶有限公司)折射率为1.512，其中液晶的含量为总质量的60％，可光聚合单体选择折射率为1.47的聚乙二醇二丙烯酸酯、折射率为1.456的1，6-己二醇二丙烯酸酯、折射率为1.458的甲基丙烯酸己酯的混合物，质量比为3∶1∶1，可光聚合单体的含量为38.5％，光引发剂的含量为1.0％，选择粒径为2μm的间隔子，其含量为0.5％；将液晶、可光聚合单体、光引发剂和玻璃微珠在室温下搅拌均匀，利用滚压工艺将混合物料挤压在两片镀有氧化铟锡的导电薄膜中，形成100微米厚的薄层，在25℃条件下，使用光强为10mw/cm2的波长为365nm的紫外光照射5分钟，制备获得视角可切换智能显示膜。
通过上述制备方法获得的视角可切换智能显示膜，利用千分尺测得其厚度为100微米，随着电压的增加，其透过率不断增加，宽视角态透光率为80％，窄视角态透光率为90％，驱动电压可低至6V，具有宽视角和窄视角切换的作用效果。
在液晶显示背光模组中加入视角可切换智能显示膜，其视角-亮度曲线如图6所示，随着驱动电压的变化，其可视视角具有一定的变化，具有视角调整的效果。图7为视角可切换智能显示膜的宽视角和窄视角模式原理图。
实施例4：
图8示出了本实施方式的含视角可切换智能显示复合膜剖面结构图。如图8所示，所述复合膜包括：第一离型保护膜层100、防眩光涂层101、第一PET层102、第一氧化铟锡导电层103、聚合物分散液晶层104、第二氧化铟锡导电层105、第二PET层106、光学级胶层107、超微细百叶窗层108、第三PET层109和第二离型保护膜层110；防眩光涂层101设置于第一离型保护膜层100之下，第一PET层102设置于防眩光涂层101之下，第一氧化铟锡导电层103设置于第一PET层102之下；聚合物分散液晶层104设置于第一氧化铟锡导电层103之下，聚合物液晶层包括液晶微滴，所述的聚合物分散液晶层由向列型液晶和丙烯酸酯单体经365nm UV聚合而成；第二氧化铟锡导电层105设置于聚合物分散液晶层104之下，第二PET层106设置于第二氧化铟锡导电层105之下，光学级胶层107设置于第二PET层106之下，超微细百叶窗层108设置于光学级胶层107之下，第三PET层109设置于超微细百叶窗层108之下，第二离型保护膜层110设置于第三PET层109之下。
在不加电时，背光源光线透过超微细百叶窗层108之后形成窄视角，再进入聚合物分散液晶层104，受液晶层光散射作用而均匀的分散开，使透过光呈宽视角模式；加电条件下，背光源光线透过超微细百叶窗层108之后形成窄视角，光线再进入聚合物分散液晶层104，直接透过而不受液晶层光散射作用，呈窄视角模式。含视角可切换智能显示复合膜的宽窄视角模式结构原理图如图9所示。
含视角可切换智能显示复合膜，利用千分尺测得其厚度为500微米，随着电压的增加，其透过率不断增加，光散射态下透光率为78％，透明态下透光率为92％，驱动电压可低至8V。
在液晶显示背光模组中加入含视角可切换智能显示复合膜，其视角-亮度曲线如图10所示，随着驱动电压的变化，含视角可切换智能显示复合膜起到了宽视角和窄视角切换的作用效果。
实施例5：
图11示出了一种本实施方式的自贴式视角可切换智能显示复合膜剖面结构图。如图11所示，所述膜包括：第一离型保护膜层100、防眩光涂层101、第一PET层102、第一氧化铟锡导电层103、聚合物分散液晶层104、第二氧化铟锡导电层105、第二PET层106、光学级胶层107、超微细百叶窗层108、第三PET层109、第二离型保护膜层110和自粘层111。防眩光涂层101设置于第一离型保护膜层100之下，第一PET层102设置于防眩光涂层101之下，第一氧化铟锡导电层103设置于第一PET层102之下；聚合物分散液晶层104设置于第一氧化铟锡导电层103之下，聚合物液晶层包括液晶微滴，所述的聚合物分散液晶层由向列型液晶和丙烯酸酯单体经365nm UV聚合而成；第二氧化铟锡导电层105设置于聚合物分散液晶层104之下，第二PET层106设置于第二氧化铟锡导电层105之下，光学级胶层107设置于第二PET层106之下，超微细百叶窗层108设置于光学级胶层107之下，第三PET层109设置于超微细百叶窗层108之下，自粘层111设置于第三PET层109之下，所述第二离型保护膜层110设置于自粘层111之下。
在不加电时，背光源光线透过超微细百叶窗层108之后形成窄视角，再进入聚合物分散液晶层104，受液晶层光散射作用而均匀的分散开，使透过光呈宽视角模式，加电条件下，背光源光线透过超微细百叶窗层108之后形成窄视角，光线再进入聚合物分散液晶层104，直接透过而不受液晶层光散射作用，呈窄视角模式。
视角可切换智能显示复合膜基材折射率为1.52，聚合物分散液晶层的折射率为1.50，整体折射率与背光模组光学膜相匹配，视角可切换膜的折射率可通过原料选择来调整，利用千分尺测得其厚度为600微米，随着电压的增加，其透过率不断增加，不加电时，光散射态下透光率为76％，加电之后，透明态下透光率为90％，驱动电压可低至10V。
在液晶显示背光模组中加入含视角可切换智能显示复合膜，其视角-亮度曲线如图12所示，随着驱动电压的变化，其可视视角具有一定的变化，具有视角调整的效果。在液晶显示背光模组中测得其视角-亮度曲线如图12所示，随着驱动电压的变化，含视角可切换智能显示复合膜起到了宽视角和窄视角切换的作用效果。
本发明所提供的一种视角可切换智能显示膜，其折射率具有可调整性，和显示背光模组中其它光学显示膜具有匹配性，对显示背光效果不造成光质影响，具有良好的显示特性，可应用于计算机、智能手机、ATM显示屏等光学显示领域。
虽然结合附图对本发明进行了说明，但是附图中公开的实施例旨在对本发明优选实施方式进行示例性说明，而不能理解为对本发明的一种限制。
虽然本发明总体构思的一些实施例已被显示和说明，本领域普通技术人员将理解，在不背离本总体发明构思的原则和精神的情况下，可对这些实施例做出改变，本发明的范围以权利要求和它们的等同物限定。

Claims (17)

  1. 一种视角可切换智能显示膜的制备方法，所述制备方法包括如下步骤：
    将液晶和可光聚合单体按照百分含量进行混合，原料配比依据导电薄膜和聚合物分散液晶层的折射率匹配性以及物料组分特性进行选择，其中液晶的百分含量为30～60％，可光聚合单体的百分含量为38～70％，光引发剂的百分含量为0.1～3.5％，间隔子的百分含量为0.1～5％；将液晶、可光聚合单体、光引发剂和间隔子室温下搅拌均匀，利用滚压工艺将混合物料挤压在两片镀有氧化铟锡的导电薄膜中，形成薄层，使用紫外光照射5-10分钟，制备获得视角可切换智能显示膜。
  2. 根据权利要求1所述的视角可切换智能显示膜的制备方法，其特征在于，所述的视角可切换智能显示膜在不通电状态下为宽视角，在通电状态下为窄视角，通过外加电压大小的调节，可达到在宽视角和窄视角之间的调节。
  3. 根据权利要求1所述的视角可切换智能显示膜的制备方法，其特征在于，所述的液晶为折射率在1.4～1.52之间的向列型液晶。
  4. 根据权利要求9所述的视角可切换智能显示膜的制备方法，其特征在于，所述的可光聚合单体为折射率在1.4～1.52之间的可光聚合单体。
  5. 根据权利要求1或4所述的视角可切换智能显示膜的制备方法，其特征在于，所述的可光聚合单体包括丙烯酸羟丙酯、甲基丙烯酸羟丙酯、丙烯酸月桂酯、甲基丙烯酸月桂酯、丙烯酸异冰片酯、甲基丙烯酸异冰片酯、1，6-己二醇二丙烯酸酯、乙基苯氧基丙烯酸酯、乙基苯氧基甲基丙烯酸酯、3，3，5-三甲基环己基丙烯酸酯、甲基丙烯酸苄基酯、丙烯酸己酯、甲基丙烯酸己酯、聚乙二醇二丙烯酸酯，乙氧基化双酚A二甲基丙烯酸酯中的一种或多种组分。
  6. 根据权利要求1所述的视角可切换智能显示膜的制备方法，其特征在于，所述的镀有氧化铟锡的导电薄膜折射率在1.46-1.52之间，聚合物分散液晶层和导电薄膜的折射率相近。
  7. 根据权利要求1所述的视角可切换智能显示膜的制备方法，其特征在于，所述的间隔子的粒径为2-10μm。
  8. 根据权利要求1所述的视角可切换智能显示膜的制备方法，其特征在于，所述的视角可切换智能显示膜的宽视角态透光率≥76％，窄视角态透光率≥88％。
  9. 根据权利要求1所述的视角可切换智能显示膜的制备方法，其特征在于，所述的视角可切换智能显示膜的驱动电压AC0～10V，膜厚度为100μm。
  10. 一种含视角可切换智能显示膜的复合膜，其特征在于，所述复合膜的结构包括：自上而下依次设置的第一离型保护膜层(100)、防眩光涂层(101)、第一PET层(102)、第一氧化铟锡导电层(103)、聚合物分散液晶层(104)、第二氧化铟锡导电层(105)、第二PET层(106)、光学级胶层(107)、超微细百叶窗层(108)、第三PET层(109)和第二离型保护膜层(110)。
  11. 根据权利要求10所述的含视角可切换智能显示膜的复合膜，其特征在于，所述第三PET层(109)和第二离型保护膜层(110)之间设置自粘层(111)。
  12. 根据权利要求10或11所述的含视角可切换智能显示膜的复合膜，其特征在于，所述的聚合物分散液晶层由向列型液晶和丙烯酸酯单体经UV光照聚合而成。
  13. 根据权利要求10或11所述的含视角可切换智能显示膜的复合膜，其特征在于，光线透过超微细百叶窗层之后形成±30度窄视角显示效果。
  14. 根据权利要求10或11所述的含视角可切换智能显示膜的复合膜，其特征在于， 所述的第一PET层、第二PET层、第一氧化铟锡层和第二氧化铟锡层以及聚合物分散液晶层的折射率相近，均在1.45-1.5之间。
  15. 根据权利要求10或11所述的含视角可切换智能显示膜的复合膜，其特征在于，所述的含视角可切换智能显示膜的复合膜在不通电状态下为宽视角，视角大小为±60度；在通电状态下为窄视角，视角大小为±30度。
  16. 根据权利要求10或11所述的含视角可切换智能显示膜的复合膜，其特征在于，所述的含视角可切换智能显示膜的复合膜的宽视角态透光率≥75％，窄视角态透光率≥90％。
  17. 根据权利要求10或11所述的含视角可切换智能显示膜的复合膜，其特征在于，所述的含视角可切换智能显示膜的复合膜的驱动电压AC0～10V，膜厚度为500-600μm。
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