WO2015014040A1 - 显示基板及其制备方法、双稳态液晶显示面板 - Google Patents

显示基板及其制备方法、双稳态液晶显示面板 Download PDF

Info

Publication number
WO2015014040A1
WO2015014040A1 PCT/CN2013/086841 CN2013086841W WO2015014040A1 WO 2015014040 A1 WO2015014040 A1 WO 2015014040A1 CN 2013086841 W CN2013086841 W CN 2013086841W WO 2015014040 A1 WO2015014040 A1 WO 2015014040A1
Authority
WO
WIPO (PCT)
Prior art keywords
display substrate
biphenyl
liquid crystal
polymer layer
substrate according
Prior art date
Application number
PCT/CN2013/086841
Other languages
English (en)
French (fr)
Inventor
李明超
Original Assignee
京东方科技集团股份有限公司
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.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/389,119 priority Critical patent/US10095065B2/en
Publication of WO2015014040A1 publication Critical patent/WO2015014040A1/zh

Links

Classifications

    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • 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
    • C09K19/02—Liquid crystal materials characterised by optical, electrical or physical properties of the components, in general
    • 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
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • 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
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/38—Polymers
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1391—Bistable or multi-stable liquid crystal cells
    • 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
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K2019/0444—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
    • C09K2019/0448—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
    • 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
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
    • C09K2019/122—Ph-Ph
    • 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
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
    • C09K2019/124—Ph-Ph-Ph-Ph
    • 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
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
    • C09K2019/125—Ph-Ph-Ph-Ph-Ph or more Ph rings
    • 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
    • C09K2219/00—Aspects relating to the form of the liquid crystal [LC] material, or by the technical area in which LC material are used
    • C09K2219/03—Aspects relating to the form of the liquid crystal [LC] material, or by the technical area in which LC material are used in the form of films, e.g. films after polymerisation of LC precursor
    • 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
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
    • C09K2323/02—Alignment layer characterised by chemical composition
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G02F1/133726—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films made of a mesogenic material
    • 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
    • G02F2202/36—Micro- or nanomaterials

Definitions

  • the invention belongs to the technical field of bistable liquid crystal display, and particularly relates to a display substrate and a preparation method thereof, and a bistable liquid crystal display panel. Background technique
  • liquid crystal molecules are in a stable state when there is no voltage, and the distribution state changes under the action of a voltage. Since the liquid crystal molecules have different optical properties (polarization performance, scattering property, reflection property, etc.) in two states, The control voltage controls the optical properties of the liquid crystal molecules to achieve display. However, since the liquid crystal molecules in the conventional liquid crystal display device have only one stable state, the other state requires the voltage to be maintained, so that the voltage must be continuously supplied for display, resulting in high energy consumption.
  • cholesteric liquid crystals have two stable states of focal conic and planar orientation when there is no voltage.
  • the liquid crystal molecules return to a voltage-free state after being subjected to a low voltage pulse, and are stabilized as a focal conic, which can scatter light (translucent, Corresponding to the bright state), and if it returns to the no-voltage state after going through the high-voltage pulse, it is stable to the plane orientation, and can reflect the light, and the wavelength of the reflected light is related to the pitch of the liquid crystal molecule, so the pitch distribution of the liquid crystal molecules can be adjusted. It can reflect all visible light (corresponding to the dark state); that is to say, the cholesteric liquid crystal can realize two different states of reflection and scattering (translucent) when there is no voltage, and achieve the effect of bistable display.
  • the driving mode which can be driven by a passive source
  • the like can be different from the conventional display device, and will not be described in detail herein.
  • the conventional bistable liquid crystal display device has a high transmittance in a dark state and a low transmittance in a bright state, so that the contrast is low and the display effect is not satisfactory.
  • the technical problems to be solved by the present invention include: targeting existing bistable liquid crystal display
  • the display device has a high transmittance in a dark state and a low transmittance in a bright state, and provides a display substrate having a low dark transmittance and a high transmittance, a preparation method thereof, and a bistable liquid crystal display panel.
  • the technical solution adopted to solve the technical problem of the present invention is a display substrate comprising a substrate, and a biphenyl polymer layer provided on the substrate.
  • the biphenyl polymer layer comprises a skeleton and a mesh formed in the skeleton, and the mesh is uniformly distributed in the skeleton.
  • the “substrate” is provided with other known display structures, such as a driving array, a common electrode, a pixel electrode, a color film, etc., in addition to the coupling polymer layer, so that the display substrate is required for display.
  • the "biphenyl polymer layer” refers to a polymer layer obtained by polymerizing a biphenyl group-containing monomer (biphenyl monomer).
  • the display substrate of the present invention includes a biphenyl polymer layer, and liquid crystal molecules in contact with the biphenyl polymer layer may be embedded in the mesh of the biphenyl polymer layer. Since the mesh of the biphenyl polymer layer is uniformly distributed in the skeleton of the biphenyl polymer layer, the biphenyl polymer layer can make the distribution of the liquid crystal molecules in contact with the biphenyl polymer layer more uniform, thereby The bistable liquid crystal display device has a lower dark transmittance, a higher bright transmittance, a higher contrast ratio, and an improved display effect.
  • the display substrate is a flexible display substrate.
  • the biphenyl polymer layer further has dispersedly distributed nano metal particles, and the nano metal particles are formed on the skeleton.
  • the nano metal particles comprise at least one of nano gold, nano silver, and nano platinum.
  • the nano metal particles have a particle diameter of 4 to 6 nm.
  • the biphenyl polymer layer is made of biphenyl monomer in parallel to the substrate.
  • the frequency of the electric field is 400-800 Hz; the electric field strength is 0.75-1.25 V/cm; and the polymerization time is 180-220 s.
  • the mesh has a pore size of 10 ⁇ 2 ⁇ m.
  • the biphenyl polymer layer has a thickness of 1 to 2 ⁇ m.
  • a technical solution to solve the technical problem of the present invention is a method for preparing a display substrate, which includes:
  • An electric field parallel to the substrate is applied to the biphenyl monomer to polymerize the biphenyl monomer into the biphenyl polymer layer.
  • the biphenyl polymer layer is composed of a skeleton and a mesh formed in the skeleton, and the mesh is uniformly distributed in the skeleton.
  • the biphenyl monomer is polymerized into a biphenyl polymer layer under an electric field, so that the morphology of the biphenyl polymer layer can be controlled by controlling parameters of the electric field (such as frequency, etc.) The pore size), so that the biphenyl polymer layer can best improve the orientation of the liquid crystal molecules, thereby making the bistable liquid crystal display device have a lower dark transmittance, a higher transmittance, and a higher contrast ratio. improve.
  • the method further comprises: immersing at least a biphenyl polymer layer in a suspension of the nano metal particles to form a dispersed distribution of the nano metal on the skeleton of the biphenyl polymer layer Particles.
  • the nano metal particles comprise at least one of nano gold, nano silver, and nano platinum.
  • the nano metal particles have a particle diameter of 4 to 6 nm.
  • the concentration of the nano metal particles in the suspension is 0.9 to 1.1 mol/L; and the soaking time is 4.5 to 5.5 hours.
  • the general formula of the biphenyl monomer is:
  • n is an integer between 1 and 3
  • X and y are each independently selected from an integer between 1 and 7
  • the frequency of the electric field is 400-800 Hz; the electric field strength is 0.75-1.25 V/cm; and the polymerization time is 180-220 s.
  • the technical solution adopted to solve the technical problem of the present invention is a Han steady liquid crystal display panel comprising a first display substrate and a second display substrate facing each other, and a liquid crystal disposed between the first display substrate and the second display substrate Layer;
  • the first display substrate is the above display substrate, and the biphenyl polymer layer faces the liquid crystal layer;
  • the second display substrate is the above display substrate, and the biphenyl polymer layer faces the liquid crystal layer.
  • the functions of the two display substrates of one bistable liquid crystal display panel are different, for example, one of the display substrates is used as a driving substrate, and the other display substrate is used as a color film substrate or the like.
  • At least one of the display substrates is the display substrate with the biphenyl polymer layer described above, so that the distribution of the liquid crystal molecules can be improved, and the dark state transmittance is lower, and the bright state is transparent.
  • the pass rate is higher and the contrast is improved.
  • the liquid crystal layer comprises cholesteric liquid crystal.
  • the present invention can be used in a bistable liquid crystal display device, particularly a bistable liquid crystal display device using cholesteric liquid crystal.
  • FIG. 1 is a cross-sectional structural view of a display substrate according to Embodiment 1 of the present invention
  • FIG. 2 is a cross-sectional structural view showing a bistable liquid crystal display panel according to Embodiment 2 of the present invention in a dark state
  • reference numerals are: 1, the substrate; 2, biphenyl polymer layer; 3, nano metal particles; 4, liquid crystal molecules; 5, polarizing plate; 6, frame sealant. detailed description
  • the embodiment provides a display substrate and a preparation method thereof.
  • the display substrate comprises a substrate 1 on which a conventional display structure (for example, a driving array, a common electrode, a pixel electrode, a color film, etc.) is provided. Since these display structures are known and diverse, It will be described in detail again.
  • a conventional display structure for example, a driving array, a common electrode, a pixel electrode, a color film, etc.
  • a biphenyl polymer layer 2 ie, a polymer layer polymerized from a monomer containing a linking group
  • the biphenyl polymer layer 2 comprising a skeleton and formed in the skeleton a mesh, the mesh is hooked in the skeleton.
  • liquid crystal molecules When the liquid crystal molecules are in contact with the biphenyl polymer layer 2, they may be embedded in the mesh of the benzene polymer layer 2, and the mesh is in contact with the biphenyl polymer layer 2 because the mesh is uniformly distributed in the skeleton. Liquid crystal molecules are also uniformly branched. It can be seen that the biphenyl polymer layer can change the distribution direction of the liquid crystal molecules in contact with it, and make the distribution of liquid crystal molecules more uniform and reasonable, thereby improving the dark state and the bright state performance of the bistable liquid crystal display device.
  • the specific thickness of the biphenyl polymer layer 2 provided on the substrate 1 is not particularly limited.
  • the thickness of the above biphenyl polymer layer 2 is 1 to 2 ⁇ . It has been found that the above range of thickness of the biphenyl polymer layer 2 can better improve the distribution of liquid crystal molecules.
  • the mesh of the biphenyl polymer layer 2 has a pore diameter of 10 ⁇ 2 ⁇ m.
  • 2 to 3 liquid crystal molecules may be embedded in each mesh of the biphenyl polymer layer 2, and contacted with the biphenyl polymer layer 2 under the interval of the skeleton of the biphenyl polymer layer 2 The liquid crystal molecules are more evenly distributed.
  • the biphenyl polymer layer 2 may be composed of a biphenyl monomer in parallel to the substrate 1.
  • Replacement page (Article 26) It is polymerized by an electric field; that is, it can be polymerized by applying an electric field of a certain frequency to the biphenyl monomer to form a biphenyl polymer layer 2.
  • the biphenyl monomer is polymerized by an electric field parallel to the substrate 1
  • the electric field causes the direction of the electron cloud of the formed biphenyl polymer layer 2 to be parallel to the substrate 1, and when the biphenyl polymer layer 2 is in contact with the liquid crystal molecules,
  • the electron cloud of the benzene polymer layer 2 interacts with the electron cloud of the liquid crystal molecules, so that the initial state of the liquid crystal molecules in contact with the biphenyl polymer layer 2 is also parallel to the substrate 1, which is a good initial state.
  • the morphology (e.g., mesh size) of the biphenyl polymer layer 2 is related to the electric field parameters (e.g., frequency), so that the best performance biphenyl polymer layer 2 can be obtained by controlling the electric field parameters.
  • the preferred electric field parameters are as follows:
  • the frequency of the electric field is 400 ⁇ 800 ⁇ ;
  • the electric field strength is 0.75 ⁇ 1.25V/cm
  • the polymerization time is 180 ⁇ 220s.
  • an electric field can be applied by using a lead in the display structure on the substrate 1, or an applied electrode can be applied to the substrate 1 to apply an electric field, which will not be described in detail.
  • nano metal particles 3 there are also dispersed nano metal particles 3 on the biphenyl polymer layer 2; that is, metal particles having a size on the order of nanometers are distributed on the biphenyl polymer layer 2, and the nano metal particles are mutually Do not overlap. It is easily understood that the nano metal particles are formed on the skeleton of the biphenyl polymer layer 2.
  • the nano metal particles 3 are embossed from the biphenyl polymer layer 2, so that the nano metal particles 3 can further partition the liquid crystal molecules, thereby further improving the distribution pattern of the liquid crystal molecules.
  • the interval between two adjacent nano metal particles may be 10 ⁇ 2 ⁇ (i.e., nano metal particles are disposed on both sides of the mesh of the biphenyl polymer layer 2).
  • the nano metal particles 3 comprise at least one of nano gold, nano silver, and nano platinum.
  • the nano metal particles 3 have a particle diameter of 4 to 6 nm.
  • the display substrate is a flexible display substrate; that is, the display substrate
  • the substrate 1 and the display structure thereon are preferably made of a flexible material so that it can be used to form a flexible display device. Since the biphenyl polymer layer 2 in the present invention is flexible and bendable, it is particularly suitable for use in a flexible display device.
  • the embodiment further provides a method for preparing the above display substrate, which includes:
  • the substrate 1 is preferably made of a flexible material.
  • the biphenyl monomer may be dissolved in a solvent to form a solution, and then the solution may be applied to the substrate by spraying or the like, wherein the solvent may be an alkane solvent (for example, cyclohexane) or an aromatic hydrocarbon solvent (for example, , toluene), etc., wherein the mass percentage of the monomer is preferably 85 to 95%.
  • the solvent may be an alkane solvent (for example, cyclohexane) or an aromatic hydrocarbon solvent (for example, , toluene), etc., wherein the mass percentage of the monomer is preferably 85 to 95%.
  • the liquid crystal molecules in contact with the biphenyl polymer layer 2 are also parallel to the substrate 1 in the initial state.
  • the morphology of the polymer network of the biphenyl polymer layer 2 formed is related to the electric field parameter: when the electric field frequency is low, the polymerization monomer diffuses rapidly, the formed polymerization network is loose, and the mesh is large; the electric field frequency is high, which hinders the single The diffusion of the body forms a dense polymer network with a small mesh. Therefore, it is possible to obtain a suitable one by selecting an appropriate electric field parameter.
  • the morphology of the polymer is such that the liquid crystal molecules reach the best distribution.
  • the mesh size of the biphenyl polymer layer 2 is preferably 10 ⁇ 2 ⁇ , and in order to achieve this size, the preferred electric field parameters are as follows:
  • the frequency of the electric field is 400 ⁇ 800 ⁇ ;
  • the electric field strength is 0.75 ⁇ 1.25V/cm
  • the polymerization time is 180 ⁇ 220s.
  • At least the biphenyl polymer layer 2 is immersed in the suspension of the nano metal particles 3 (for example, the substrate 1 may be entirely immersed), and the dispersed nano metal particles are formed on the skeleton of the biphenyl polymer layer 2. 3. A bistable liquid crystal display panel is obtained.
  • the substrate 1 can be immersed in a suspension of the nano metal particles 3 to self-assemble the nano metal particles 3 onto the biphenyl polymer layer 2.
  • the concentration of the nano metal particles 3 in the suspension is 0.9 to 1.1 mol/L; the soaking time is 4.5 to 5.5 hours.
  • the nano metal particles 3 comprise at least one of nano gold, nano silver, and nano platinum.
  • the nano metal particles 3 have a particle diameter of 4 to 6 nm.
  • a bistable liquid crystal display panel is separately fabricated under different parameters of different biphenyl monomers, and two display substrates fabricated by the same method are inserted into the box, and biliary liquid crystal is injected therein to obtain a bistable state.
  • Liquid crystal display panel the display structures on the two display substrates in each display panel are different, and the electric fields of the biphenyl polymer layer 2 forming the two display substrates are preferably parallel and reverse), and then each bistable liquid crystal display panel is tested Transmittance in the bright state (corresponding to the focal length of the liquid crystal) and the dark state (corresponding to the plane orientation of the liquid crystal).
  • the dark state transmission frequency of the bistable liquid crystal display panel composed of the display substrate prepared by the method of the embodiment is between 0.8 and 0.9%, and the bright state transmission frequency is between 75 and 80%;
  • the conventional conventional bistable liquid crystal display panel generally has a dark state transmission frequency of 1% or more, and a bright state transmission frequency of generally 70% or less.
  • the display substrate of the invention can simultaneously improve the distribution of liquid crystal molecules in a dark state and a bright state, reduce the dark state transmittance of the bistable liquid crystal display panel, improve the transmittance of the bright state, thereby improving the contrast thereof and improving the contrast thereof. display effect.
  • the embodiment provides a bistable liquid crystal display panel, which is formed by pairing a first display substrate and a second display substrate, wherein:
  • the first display substrate is the display substrate described above, and the biphenyl polymer layer 2 of the first display substrate faces the liquid crystal layer (ie, the coupled polymer layer 2 of the first display substrate and the liquid crystal layer Contact);
  • the second display substrate is the display substrate, and the biphenyl polymer layer 2 of the second display substrate faces the liquid crystal layer (ie, the biphenyl polymer layer 2 and the liquid crystal layer of the second display substrate) Contact).
  • At least one of the first display substrate and the second display substrate of the bistable liquid crystal display panel of the present embodiment is the display substrate provided by the present invention, and the biphenyl polymer layer 2 is bistable.
  • the liquid crystal layer of the liquid crystal display panel i.e., in contact with the liquid crystal molecules 4) can improve the distribution of the liquid crystal molecules 4, lower the dark state transmittance, higher the bright state transmittance, and improve the contrast ratio.
  • first display substrate and the second of a bistable liquid crystal display panel are obviously different, for example, one of them is a driving substrate, and the other is a color film substrate or the like, which will not be described in detail herein.
  • both the first display substrate and the second display substrate are the above display substrates provided by the present invention, so that the best effect of improving the distribution of the liquid crystal molecules 4 can be achieved.
  • the direction of the liquid crystal molecules in contact with the biphenyl polymer layer 2 of the first substrate is parallel and opposite to the direction of the liquid crystal molecules in contact with the biphenyl polymer layer 2 of the second substrate.
  • the electric field used to form the biphenyl polymer layer 2 of the first substrate and the biphenyl polymer layer 2 forming the second substrate are The electric fields used are parallel and opposite to each other.
  • the liquid crystal layer is composed of cholesteric liquid crystal.
  • the cholesteric liquid crystal is a liquid crystal type commonly used in a bistable liquid crystal display device, and the bistable liquid crystal display panel of the present invention is particularly suitable for using cholesteric liquid crystal.
  • part of the display structure can be conventional
  • the display panel is different: for example, it can be driven by a thin film transistor array instead of a passive driving method; for example, there can be no polarizing plate (because it is displayed by switching of scattering/reflection, the polarizing plate is not necessary), Alternatively, two polarizing plates 5 having mutually perpendicular vibration directions (mainly for improving visual effects at different viewing angles) may be used.
  • the above display panel may further include other structures such as the substrate 1, the nano metal particles 3, the sealant 6, and the like, and will not be described in detail herein.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

一种显示基板及其制备方法、双稳态液晶显示面板，可解决现有的双稳态液晶显示装置暗态透过率高、亮态透过率低的问题。显示基板包括基底（1），以及设于基底（1）上的联苯聚合物层（2）。显示基板的制备方法包括：在基底（1）上施加联苯单体；对联苯单体施加平行于基底（1）的电场，使联苯单体聚合为联苯聚合物层（2）。

Description

显示基板及其制备方法、 双稳态液晶显示面板 技术领域
本发明属于双稳态液晶显示技术领域， 具体涉及一种显示基 板及其制备方法、 双稳态液晶显示面板。 背景技术
在常规液晶显示装置中， 液晶分子在无电压时处于稳定态， 在电压作用下分布状态改变， 由于液晶分子在两种状态下光学性 能 (偏振性能、 散射性能、 反射性能等)不同， 故通过控制电压即可 控制液晶分子的光学性能， 从而实现显示。 但由于常规液晶显示 装置中液晶分子只有一种稳定态， 另一种状态需要电压才能维持， 故为进行显示就必须持续提供电压， 导致其能耗较高。
为降低能耗， 人们提出了双稳态液晶显示装置的概念， 其中 使用的液晶分子在无电压时有两种光学性能不同的稳定状态， 因 此其不需电压即可持续显示画面， 只在切换画面时供电即可， 能 耗大幅降低。 例如， 胆甾液晶在无电压时有焦锥构向和平面构向 两种稳定态， 液晶分子经历低压脉沖后回到无电压状态会稳定为 焦锥构向， 可散射光线 (半透明， 可对应亮态）， 而若经历高压脉沖 后回到无电压状态后则稳定为平面构向， 可反射光线， 且其反射 光的波长与液晶分子螺距有关， 故通过调整液晶分子的螺距分布 可使其能反射全部可见光 (可对应暗态)； 也就是说， 胆 液晶在无 电压时可实现反射与散射 (半透明）两种不同状态，达到双稳态显示 的效果。 当然， 对于双稳态液晶显示装置， 其驱动方式 (可采用无 源驱动)等可与常规显示装置不同， 在此不再详细描述。
但是， 现有的双稳态液晶显示装置在暗态时的透过率较高， 亮态时的透过率较低， 故对比度低， 显示效果不理想。 发明内容
本发明所要解决的技术问题包括， 针对现有的双稳态液晶显
替换页 （细则第 26条) 示装置暗态透过率高、 亮态透过率低的问题， 提供一种暗态透过 率低、 亮态透过率高的显示基板及其制备方法、 双稳态液晶显示 面板。
解决本发明技术问题所采用的技术方案是一种显示基板， 包 括基底， 以及设于所述基底上的联苯聚合物层。
其中， 所述联苯聚合物层包括骨架和形成在所述骨架中的网 孔， 所述网孔在所述骨架中均勾分布。
其中， 所述"基底"上除联笨聚合物层外， 还设有其他已知的 显示结构， 如驱动阵列、 公共电极、 像素电极、 彩膜等， 从而使 显示基板实现进行显示所需的功能； 而所述 "联苯聚合物层"是指 由含联苯基团的单体 (联苯单体)聚合而成的聚合物层。
本发明的显示基板中包括联苯聚合物层， 与该联苯聚合物层 接触的液晶分子可以嵌入联苯聚合物层的网孔中。 由于联苯聚合 物层的网孔均勾地分布在联苯聚合物层的骨架中， 所以所述联苯 聚合物层可以使得与该联苯聚合物层接触的液晶分子的分布更加 均匀， 从而使双稳态液晶显示装置的暗态透过率更低， 亮态透过 率更高， 对比度提高， 显示效果改善。
优选的是， 所述显示基板为柔性显示基板。
优选的是， 所述联苯聚合物层上还有分散分布的纳米金属颗 粒， 所述纳米金属颗粒形成在所述骨架上。
进一步优选的是， 所述纳米金属颗粒包括纳米金、 纳米银、 纳米铂中的至少一种。
进一步优选的是， 所述纳米金属颗粒的粒径为 4~6nm。
优选的是， 形成所述联苯聚合物的联苯单体的通式为：
Figure imgf000003_0001
其中， n为 1至 3间的整数， X和 y分别独立的选自 1至 7间 的整数， R1 和 R2 分别独立的选自 -CH=CH2、 -OCH2CH=CH2、 -CH2NH2、 -CH2COOH。
优选的是， 所述联苯聚合物层由联苯单体在平行于基底的电
替换页 （细则第 26条) 场作用下聚合而成， 所述电场的频率为 400~800Hz; 所述电场强 度为 0.75~1.25V/cm; 所述聚合时间为 180~220s。
优选的是所述网孔的孔径为 10±2μηι。
优选的是， 所述联苯聚合物层的厚度为 1~2μηι。
解决本发明技术问题所釆用的技术方案是一种显示基板的制 备方法， 其包括：
在基底上施加联苯单体；
对联苯单体施加平行于基底的电场， 使联苯单体聚合为所述 联苯聚合物层。
其中，联苯聚合物层由骨架和形成在所述骨架中的网孔构成， 并且所述网孔在所述骨架中均勾分布。
本发明的显示基板的制备方法中， 联笨单体在电场下聚合为 联苯聚合物层，故通过控制电场的参数 (如频率等)即可控制联苯聚 合物层的形貌 (如网孔尺寸），从而使联苯聚合物层可起到最好的改 善液晶分子取向的作用， 进而使双稳态液晶显示装置的暗态透过 率更低， 亮态透过率更高， 对比度提高。
优选的是， 在形成所述联苯聚合物层后， 还包括： 至少使联 苯聚合物层浸泡于纳米金属颗粒的悬浮液中， 在联苯聚合物层的 骨架上形成分散分布的纳米金属颗粒。
进一步优选的是， 所述纳米金属颗粒包括纳米金、 纳米银、 纳米铂中的至少一种。
进一步优选的是， 所述纳米金属颗粒的粒径为 4~6nm。
进一步优选的是， 所述悬浮液中纳米金属颗粒的浓度为 0.9~1.1mol/L; 所述浸泡时间为 4.5~5.5h。
优选的是， 所述联苯单体的通式为：
R1— <CH2)xO- ~0(CH2)r-R2
n 其中， n为 1至 3间的整数， X和 y分别独立的选自 1至 7间 的整数， R1 和 R2分别独立的选自 -CH=CH2、 -OCH2CH=CH2、 -CH2NH2、 -CH2COOH。
替换页 （细则第 26条) 优选的是， 所述电场的频率为 400~800Hz; 所述电场强度为 0.75-1.25V/cm; 所述聚合时间为 180~220s。
解决本发明技术问题所采用的技术方案是一种汉稳态液晶显 示面板， 包括相互对盒的第一显示基板和第二显示基板， 以及设 于第一显示基板和第二显示基板间的液晶层； 其中，
所述第一显示基板为上述的显示基板， 且所述联苯聚合物层 朝向所述液晶层；
和 /或
所述第二显示基板为上述的显示基板， 且所述联苯聚合物层 朝向所述液晶层。
其中， 一个双稳态液晶显示面板的两个显示基板的功能是不 同的， 例如其中一个显示基板用作驱动基板， 另一个显示基板用 作彩膜基板等。
本发明的双稳态液晶显示面板中， 至少一个显示基板为上述 的带有联苯聚合物层的显示基板， 故其可改善液晶分子的分布， 使暗态透过率更低， 亮态透过率更高， 对比度提高。
优选的是， 所述液晶层包括胆 液晶。
本发明可用于双稳态液晶显示装置中， 尤其是使用胆 液晶 的双稳态液晶显示装置。 附图说明
图 1为本发明的实施例 1的显示基板的剖面结构示意图； 图 2为本发明的实施例 2的双稳态液晶显示面板在暗态时的 剖面结构示意图；
其中附图标记为： 1、 基底； 2、 联苯聚合物层； 3、 纳米金属 颗粒； 4、 液晶分子； 5、 偏振片； 6、 封框胶。 具体实施方式
为使本领域技术人员更好地理解本发明的技术方案， 下面结 合附图和具体实施方式对本发明作进一步详细描述。
替换页 （细则第 26条) 实施例 1 :
如图 1所示， 本实施例提供一种显示基板及其制备方法。 其中， 显示基板包括基底 1， 在基底 1 上设有常规的显示结 构 (例如， 驱动阵列、 公共电极、 像素电极、 彩膜等）， 由于这些显 示结构是已知且多样的， 故在此不再对其进行详细描述。
在基底 1 上还设有联苯聚合物层 2 (即由含联笨基团的单体 聚合而成的聚合物层） ， 该联苯聚合物层 2 包括骨架和形成在所 述骨架中的网孔， 所述网孔在所述骨架中均勾分布。
液晶分子与联苯聚合物层 2相接触时， 可以嵌入 苯聚合物 层 2的网孔中， 由于所述网孔在所述骨架中均匀分布， 因此， 与 该联苯聚合物层 2接触的液晶分子也是均勾分布的。 由此可知， 联苯聚合物层可改变与其接触的液晶分子的分布方向， 使液晶分 子的分布更加均匀合理， 从而改善双稳态液晶显示装置的暗态和 亮态性能。
在本发明中， 对设置在基底 1上的联苯聚合物层 2的具体厚 度并没有特殊限制，优选的，以上联苯聚合物层 2的厚度为 1~2μηη。 经研究发现， 以上厚度范围的联苯聚合物层 2可起到较好的改善 液晶分子分布的效果。
优选的， 形成联苯聚合物的联苯单体的通式为：
Figure imgf000006_0001
其中， n为 1至 3间的整数， X和 y分别独立的选自 1至 7间 的整数， R1和 R2分别独立的选自 -CH=CH2、 -OCH2CH=CH2, -CH2NH2、 -CH2COOH。
为了使与联苯聚合物层 2接触的液晶分子分布更加均匀合 理， 优选的， 该联苯聚合物层 2的所述网孔的孔径为 10±2μηι。 在 这种情况下， 联苯聚合物层 2的每个网孔中可以嵌入 2至 3个液 晶分子，在联笨聚合物层 2的骨架的间隔之下， 与联苯聚合物层 2 接触的液晶分子分布的更加均匀。
具体地， 联苯聚合物层 2可以由联苯单体在平行于基底 1的
替换页 （细则第 26条) 电场作用下聚合而成； 也就是说， 可通过对联苯单体施加一定频 率的电场而使其发生聚合，形成联苯聚合物层 2。在利用平行于基 底 1的电场使联苯单体发生聚合时，电场使形成的联苯聚合物层 2 的电子云的方向平行于基底 1， 联苯聚合物层 2与液晶分子接触 时， 联苯聚合物层 2的电子云与液晶分子的电子云互相作用， 从 而使得与联苯聚合物层 2接触的液晶分子的初始状态也平行于基 底 1 , 这是一种良好的初始状态。
该联苯聚合物层 2的形貌 (例如，网孔尺寸）与电场参数 (例如， 频率)是相关的， 因此可通过控制电场参数得到性能最好的联苯聚 合物层 2。 其中， 为了使网孔的孔径达到上述优选的 10±2μΓΠ, 优 选的电场参数如下：
电场的频率为 400~800Ηζ;
电场强度为 0.75~1.25V/cm;
聚合时间为 180~220s。
具体的， 形成电场的方式是多样的， 例如可利用基底 1上的 显示结构中的引线施加电场， 或者也可在基底 1 上贴附外加电极 施加电场， 在此不在详细描述。
优选的， 在联苯聚合物层 2上还有分散分布的纳米金属颗粒 3; 也就是说， 在联苯聚合物层 2上分布有尺寸在纳米量级的金属 颗粒， 且这些纳米金属颗粒互不交叠。 容易理解的是， 纳米金属 颗粒形成在联苯聚合物层 2的骨架上。
如图 1和图 2所示， 纳米金属颗粒 3从联苯聚合物层 2上凸 起， 使得纳米金属颗粒 3可以对液晶分子进行进一步的间隔， 从 而可以进一步改善液晶分子的分布形态。 优选地， 相邻两个納米 金属颗粒之间的间隔可以为 10±2μηι (即， 联苯聚合物层 2的网孔 两侧设置有纳米金属颗粒） 。
优选的， 纳米金属颗粒 3包括纳米金、 纳米银、 纳米铂中的 至少一种。
优选的， 纳米金属颗粒 3的粒径为 4~6nm。
优选的， 显示基板为柔性显示基板； 也就是说， 显示基板的
6 替换页 （细则第 26条) 基底 1 及其上的显示结构优选是由柔性材料制成的， 从而可用其 形成柔性显示装置。 由于本发明中的联苯聚合物层 2是柔性的， 可弯曲， 故其特别适用于柔性显示装置中。
本实施例还提供上述显示基板的制备方法， 其包括：
S01、 在基底 1上形成其他已知的显示结构 (例如， 驱动阵列、 公共电极、 像素电极、 彩膜等)， 由于这些显示结构的形成方法是 已知的， 故在此不再详细描述。
其中， 所述基底 1优选是由柔性材料制成的。
502、 在完成上述步骤的基底 1上施加联苯单体。
具体的， 可将联苯单体溶于溶剂中制成溶液， 再将溶液通过 喷涂等方式施加在基板上， 其中， 溶剂可为烷烃类溶剂（例如， 环 己烷)、 芳烃类溶剂（例如， 甲苯)等， 其中联笨单体的质量百分浓 度优选为 85〜95%。
当然， 如果通过旋涂等方式直接将联苯单体施加在基底 1上 也是可行的。
优选的， 联苯单体为上述的联苯单体， 即其通式为：
Figure imgf000008_0001
其中， n为 1至 3间的整数， X和 y分别独立的选自 1至 7间 的整数， R1和 R2分别独立的选自 -CH=CH2、 -OCH2CH=CH2、
-CH2NH2. -CH2COOH。
503、对所述联苯单体施加平行于基底 1的电场， 使该联苯单 体聚合为联苯聚合物层 2。
优选地， 利用平行于基底 1 的电场使联苯单体聚合为联苯聚 合物层 2之后， 与联苯聚合物层 2接触的液晶分子在初始状态中 也平行于基底 1。
其中， 所形成的联苯聚合物层 2的聚合物网络的形貌与电场 参数相关： 电场频率低则聚合单体扩散快， 形成的聚合网络疏松， 网孔较大； 电场频率高则阻碍单体的扩散， 形成的聚合物网络致 密， 网孔较小。 因此， 可通过选择适当的电场参数来获得合适的
替换页 （细则第 26条) 聚合物形貌， 以使液晶分子达到最好的分布。 如上文中所述， 联 苯聚合物层 2的网孔大小优选为 10±2μηι， 为了达到该尺寸， 优选 的电场参数如下：
电场的频率为 400〜800Ηζ;
电场强度为 0.75~1.25V/cm;
聚合时间为 180~220s。
S04、 优选的， 至少使联苯聚合物层 2浸泡于纳米金属颗粒 3 的悬浮液中（例如可将基底 1整体浸泡），在联苯聚合物层 2的骨架 上形成分散分布的纳米金属颗粒 3， 得到双稳态液晶显示面板。
也就是说， 可将基底 1浸泡在纳米金属颗粒 3的悬浮液中， 使纳米金属颗粒 3自组装到联苯聚合物层 2上。
优选的， 悬浮液中纳米金属颗粒 3的浓度为 0.9~1.1mol/L; 浸泡时间为 4.5~5.5h。
优选的， 纳米金属颗粒 3包括纳米金、 纳米银、 纳米铂中至 少一种。
优选的， 纳米金属颗粒 3的粒径为 4~6nm。
按照上述方法和参数， 以不同的联苯单体在不同参数下分别 制造双稳态液晶显示面板， 并将两个用同样方法制造的显示基板 对盒， 向其中注入胆 液晶， 得到双稳态液晶显示面板 (每个显示 面板中的两个显示基板上的显示结构不同， 且形成两显示基板的 联苯聚合物层 2的电场优选平行且反向）， 之后测试各双稳态液晶 显示面板在亮态 (对应液晶的焦锥构向）和暗态 (对应液晶的平面构 向）时的透过率。 经测试发现， 用按照本实施例的方法制备的显示 基板组成的双稳态液晶显示面板的暗态透过频率在 0.8~0.9%之 间， 亮态透过频率在 75~80%之间； 相对的， 现有的常规双稳态液 晶显示面板的暗态透过频率一般在 1%以上， 亮态透过频率一般在 70%以下。
可见， 本发明的显示基板可同时改善液晶分子在暗态和亮态 的分布， 降低双稳态液晶显示面板的暗态透过率， 提高其亮态透 过率， 从而提高其对比度， 改善其显示效果。
8 替换页 （细则第 26条) 实施例 2:
如图 2所示， 本实施例提供一种双稳态液晶显示面板， 其由 第一显示基板和第二显示基板对盒而成， 其中：
第一显示基板为上述的显示基板， 且所述第一显示基板的联 苯聚合物层 2朝向所述液晶层 （即， 所述第一显示基板的联笨聚 合物层 2与所述液晶层接触） ；
和 /或
第二显示基板为上述的显示基板， 且所述第二显示基板的联 苯聚合物层 2朝向所述液晶层（即， 所述第二显示基板的联苯聚 合物层 2与所述液晶层接触） 。
也就是说， 本实施例的双稳态液晶显示面板的第一显示基板 和第二显示基板中， 至少有一个是本发明所提供的上述显示基板， 且其联苯聚合物层 2朝向双稳态液晶显示面板的液晶层（即， 与液 晶分子 4接触）， 从而可改善液晶分子 4的分布， 使暗态透过率更 低， 亮态透过率更高， 对比度提高。
当然， 一个双稳态液晶显示面板的第一显示基板和第二显然 是不同的， 例如其中一个为驱动基板， 另一个为彩膜基板等， 在 此不再详细描述。
优选的， 第一显示基板和第二显示基板都为本发明所提供的 上述显示基板， 从而可达到最好的改善液晶分子 4分布的效果。 其中， 与第一基板的联苯聚合物层 2接触的液晶分子的方向和与 第二基板的联苯聚合物层 2接触的液晶分子的方向平行且相反。 为了达到这一目的， 当第一显示基板和第二显示基板均为上述显 示基板时， 形成第一基板的联苯聚合物层 2时所用的电场与形成 第二基板的联苯聚合物层 2时所用的电场相互平行且反向。
优选的， 液晶层由胆 液晶构成。 胆 液晶是双稳态液晶显 示装置中常用的液晶类型， 本发明的双稳态液晶显示面板特别适 于采用胆甾液晶。
当然， 对于双稳态液晶显示面板， 其部分显示结构可与常规
替换页 （细则第 26条) 显示面板不同： 例如， 其可不釆用薄膜晶体管阵列驱动， 而采用 无源驱动方式； 再如， 其中可没有偏振片（因其通过散射 /反射的切 换实现显示， 故偏振片不是必须的）， 或者也可使用两个透振方向 相互垂直的偏振片 5(主要用于改善在不同视角的视觉效果)。
当然， 上述显示面板中还可包括基底 1、 纳米金属颗粒 3、 封 框胶 6等其他结构， 在此不再详细描述。
可以理解的是， 以上实施方式仅仅是为了说明本发明的原理 而采用的示例性实施方式， 然而本发明并不局限于此。 对于本领 域内的普通技术人员而言， 在不脱离本发明的精神和实质的情况 下， 可以做出各种变型和改进， 这些变型和改进也视为本发明的 保护范围。
10 替换页 （细则第 26条)

Claims

权利要求书
1. 一种显示基板， 包括基底， 其特征在于， 所述显示基板还 包括：
设于所述基底上的联苯聚合物层。
2. 根据权利要求 1所述的显示基板， 其特征在于， 所述联苯 聚合物层包括骨架和形成在所述骨架中的网孔， 所述网孔在所述 骨架中均匀分布。
3. 根据权利要求 1所述的显示基板， 其特征在于， 所述显示基板为柔性显示基板。
4. 根据权利要求 2所述的显示基板， 其特征在于， 所述联苯聚合物层上还有分散分布的纳米金属颗粒， 所述纳 米金属颗粒位于所述骨架上。
5. 根据权利要求 4所述的显示基板， 其特征在于， 所述纳米金属颗粒包括纳米金、 纳米银、 纳米铂中的至少
6. 根据权利要求 4所述的显示基板， 其特征在于， 所述纳米金属颗粒的粒径为 4~6nm。
7. 根据权利要求 1至 6中任意一项所述的显示基板， 其特征 在于， 形成所述联苯聚合物的联苯单体的通式为：
Figure imgf000012_0001
其中， n为 1至 3间的整数， X和 y分别独立的选自 1至 7间 的整数， R1 和 R2 分别独立的选自 -CH=CH2、 -OCH2CH=CH2
11 替换页 （细则第 26条) -CH2NH2、 -CH2COOH。
8. 根据权利要求 1至 6中任意一项所述的显示基板， 其特征 在于， 所述联苯聚合物层由联苯单体在平行于基底的电场作用下 聚合而成。
9. 根据权利要求 8所述的显示基板， 其特征在于， 所述网孔 ^；孑 L 为 10±2μηι。
10. 根据权利要求 1至 6中任意一项所述的显示基板， 其特 征在于，
所述联苯聚合物层的厚度为 1 ~2μΓΠ。
11. 一种显示基板的制备方法， 其特征在于， 包括： 在基底上施加联苯单体；
对联苯单体施加平行于基底的电场， 使联苯单体聚合为所述 联苯聚合物层。
12. 根据权利要求 11所述的显示基板的制备方法， 其特征在 于， 在形成所述联苯聚合物层后， 还包括：
至少使联苯聚合物层浸泡于纳米金属颗粒的悬浮液中， 在联 苯聚合物层上形成分散分布的纳米金属颗粒。
13. 根据权利要求 12所述的显示基板的制备方法， 其特征在 于，
所述纳米金属颗粒包括纳米金、 纳米银、 纳米铂中的至少一 种。
14. 根据权利要求 12所述的显示基板的制备方法， 其特征在
替换页 （细则第 26条) 所述纳米金属颗粒的粒径为 4~6nm。
15. 根据权利要求 12所述的显示基板的制备方法， 其特征在 于，
所述悬浮液中纳米金属颗粒的浓度为 0.9~1.1mol/L;
所述浸泡时间为 4.5~5.5h。
16. 根据权利要求 11至 15中任意一项所述的显示基板的制 备方法， 其特征在于， 所述联苯单体的通式为：
R1— (CH2)xO- -0(CH2)5r-R2
- 一 — J π 其中， η为 1至 3间的整数， X和 y分别独立的选自 1至 7间 的整数， R1 和 R2分别独立的选自 -CH=CH2、 -OCH2CH=CH2、 -CH2NH2、 -CH2COOH。
17. 根据权利要求 11所述的显示基板的制备方法， 其特征在 所述电场的频率为 400~800Hz;
所述电场强度为 0.75〜1.25V/cm;
所述聚合时间为 180~220s。
18. 一种双稳态液晶显示面板， 包括相互对盒的第一显示基 板和第二显示基板， 以及设于第一显示基板和第二显示基板间的 液晶层； 其特征在于，
所述第一显示基板为权利要求 1至 10中任意一项所述的显示 基板， 且所述第一显示基板的联苯聚合物层朝向所述液晶层； 和 /或
所述第二显示基板为权利要求 1至 10中任意一项所述的显示 基板， 且所述第二显示基板的联苯聚合物层朝向所述液晶层。
13 替换页 （细则第 26条)
19. 根据权利要求 18所述的汉稳态液晶显示面板， 其特征在 于，
所述液晶层包括胆 液晶。
14 页 （细则第 26
PCT/CN2013/086841 2013-07-31 2013-11-11 显示基板及其制备方法、双稳态液晶显示面板 WO2015014040A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/389,119 US10095065B2 (en) 2013-07-31 2013-11-11 Display substrate and manufacturing method thereof, and bistable liquid crystal display panel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310329809.4A CN103412438B (zh) 2013-07-31 2013-07-31 显示基板及其制备方法、双稳态液晶显示面板
CN201310329809.4 2013-07-31

Publications (1)

Publication Number Publication Date
WO2015014040A1 true WO2015014040A1 (zh) 2015-02-05

Family

ID=49605465

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/086841 WO2015014040A1 (zh) 2013-07-31 2013-11-11 显示基板及其制备方法、双稳态液晶显示面板

Country Status (3)

Country Link
US (1) US10095065B2 (zh)
CN (1) CN103412438B (zh)
WO (1) WO2015014040A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104317090A (zh) * 2014-11-03 2015-01-28 合肥鑫晟光电科技有限公司 双稳态液晶光阀及其操作方法
US20170336663A1 (en) * 2014-11-06 2017-11-23 Gauzy Ltd. Bistable liquid crystal dispersion devices comprising metal-organic mesogens and applications thereof
CN106427792B (zh) * 2016-11-14 2019-01-01 京东方科技集团股份有限公司 防眩目结构、防眩目后视镜及车辆

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0915144A1 (en) * 1997-11-04 1999-05-12 Dai Nippon Printing Co., Ltd. Fluorescent liquid crystalline charge transfer materials
US7471369B2 (en) * 2001-01-11 2008-12-30 Sipix Imaging, Inc. Transmissive or reflective liquid crystal display and process for its manufacture
CN101566761A (zh) * 2008-04-24 2009-10-28 索尼株式会社 液晶显示器件
CN103733127A (zh) * 2011-08-12 2014-04-16 夏普株式会社 液晶显示装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2006093131A1 (ja) * 2005-03-01 2008-08-07 大日本印刷株式会社 配向膜付フィルム及び光学素子
US8294838B2 (en) * 2007-05-03 2012-10-23 University Of Manitoba Planar nematic liquid crystal cells doped with nanoparticles and methods of inducing a freedericksz transition
KR20100123760A (ko) * 2008-06-27 2010-11-24 샤프 가부시키가이샤 액정 표시 장치 및 그 제조 방법
US8274213B2 (en) * 2008-08-12 2012-09-25 Samsung Electronics Co., Ltd. Electrochromic materials and electrochromic devices using the same
TWI388905B (zh) * 2009-03-17 2013-03-11 Au Optronics Corp 液晶顯示面板及其製造方法
EP2416211B1 (en) * 2009-03-30 2013-12-11 Sharp Kabushiki Kaisha Liquid crystal display device, process for producing liquid crystal display device, composition for forming polymer layer, and composition for forming liquid crystal layer
US8501286B2 (en) * 2011-07-22 2013-08-06 Shenzhen China Star Optoelectronics Technology Co., Ltd. Reactive monomer of liquid crystal and liquid crystal panel
CN203376535U (zh) * 2013-07-31 2014-01-01 京东方科技集团股份有限公司 显示基板、双稳态液晶显示面板

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0915144A1 (en) * 1997-11-04 1999-05-12 Dai Nippon Printing Co., Ltd. Fluorescent liquid crystalline charge transfer materials
US7471369B2 (en) * 2001-01-11 2008-12-30 Sipix Imaging, Inc. Transmissive or reflective liquid crystal display and process for its manufacture
CN101566761A (zh) * 2008-04-24 2009-10-28 索尼株式会社 液晶显示器件
CN103733127A (zh) * 2011-08-12 2014-04-16 夏普株式会社 液晶显示装置

Also Published As

Publication number Publication date
CN103412438B (zh) 2016-03-02
CN103412438A (zh) 2013-11-27
US10095065B2 (en) 2018-10-09
US20150309352A1 (en) 2015-10-29

Similar Documents

Publication Publication Date Title
TWI360003B (en) A liquid crystal alignment layer and methods of ma
JP2002277862A (ja) 液晶光変調器及びそれを用いた表示装置
JP2005336477A5 (zh)
TW201219932A (en) Liquid crystal display and method for preparation thereof
CN102629013A (zh) 一种液晶显示装置及其制作方法
JP6927876B2 (ja) ポリマー含有散乱型液晶素子の製造方法及びポリマー含有散乱型液晶素子
WO2015014040A1 (zh) 显示基板及其制备方法、双稳态液晶显示面板
Sheng et al. Multicolor electrochromic dye-doped liquid crystal yolk–shell microcapsules
WO2011102892A1 (en) Fast-switching surface-stabilized liquid crystal cells
CN103353690B (zh) 一种液晶显示面板及其制备方法、液晶显示装置
Lin et al. IPS-LCD using a glass substrate and an anisotropic polymer film
US9146415B2 (en) Apparatus and method for manufacturing encapsulated liquid crystals and liquid crystal display including the encapsulated liquid crystals
CN203376535U (zh) 显示基板、双稳态液晶显示面板
WO2014183389A1 (zh) 稳定蓝相液晶晶体结构的方法、显示装置及制作方法
CN103969903B (zh) 液晶显示装置和安装有液晶显示装置的设备
JP4832027B2 (ja) 液晶光変調器およびそれを用いた液晶表示装置
US7405795B2 (en) In-plane-switching mode liquid crystal display device and method of fabricating the same with nematic liquid crystal molecule layer driven in-plane by molecules of sandwiching ferroelectric layers rotating along a virtual cone
CN100394218C (zh) 光学积分器
TW201226439A (en) Alignment layer material, alignment layer, birefringent liquid crystal film and manufacturing method thereof
JP4223107B2 (ja) 液晶光変調器
JP4252202B2 (ja) 強誘電性液晶を用いた液晶光変調器とその製造方法
JP4220816B2 (ja) 液晶光変調器およびその製造方法ならびに液晶表示装置
JPH11237618A (ja) 液晶表示素子
JPH10319375A (ja) 高分子分散型液晶表示素子とその製造方法
JP2004264658A (ja) 液晶素子およびその製造方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 14389119

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13890692

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM F1205A DATED 22.06.2016)

122 Ep: pct application non-entry in european phase

Ref document number: 13890692

Country of ref document: EP

Kind code of ref document: A1