WO2014190705A1 - 液晶显示面板及其驱动方法和制作方法、显示装置 - Google Patents

液晶显示面板及其驱动方法和制作方法、显示装置 Download PDF

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Publication number
WO2014190705A1
WO2014190705A1 PCT/CN2013/088552 CN2013088552W WO2014190705A1 WO 2014190705 A1 WO2014190705 A1 WO 2014190705A1 CN 2013088552 W CN2013088552 W CN 2013088552W WO 2014190705 A1 WO2014190705 A1 WO 2014190705A1
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Prior art keywords
transparent electrode
substrate
electrode unit
liquid crystal
transparent
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PCT/CN2013/088552
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English (en)
French (fr)
Inventor
鹿岛美纪
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to US14/236,171 priority Critical patent/US9645455B2/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • 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
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
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    • 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
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    • 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
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    • G02F1/134309—Electrodes characterised by their geometrical arrangement
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    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • 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
    • G02F1/13345—Network or three-dimensional gels
    • 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
    • G02F1/13347—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals working in reverse mode, i.e. clear in the off-state and scattering in the on-state
    • 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
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
    • 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
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    • G02F1/1343—Electrodes
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    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
    • 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
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    • G02F1/134381—Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates

Definitions

  • Liquid crystal display panel driving method thereof, manufacturing method, and display device
  • Embodiments of the present invention relate to a liquid crystal display panel, a driving method thereof, a manufacturing method, and a display device. Background technique
  • PDLC polymer dispersed liquid crystal
  • LCD Liquid Crystal Display
  • PDLC typically includes liquid crystal molecules and a polymer matrix. The optical properties of the PDLC layer are highly dependent on the effective refractive index of the liquid crystal molecules and the matching with the polymer matrix.
  • Ordinary PDLC layers are generally prepared using positive liquid crystals.
  • the liquid crystal molecules When no voltage is applied, the liquid crystal molecules are disorderly arranged, so that the incident light enters and refracts and reflects multiple times at the interface between the liquid crystal molecules and the polymer matrix, and exhibits a milky white scattering state; when a voltage is applied, the liquid crystal molecules It is arranged along the direction of the electric field so that the incident light comes in and is transmitted directly without reflection and refraction.
  • the trans PDLC layer is typically prepared using a negative liquid crystal.
  • the liquid crystal molecules When no voltage is applied, the liquid crystal molecules are arranged perpendicular to the substrate, so that the incident light is directly transmitted without reflection and refraction; when a voltage is applied, the liquid crystal molecules are aligned perpendicular to the direction of the electric field, so that the incident light comes in after
  • the interface between the liquid crystal molecules and the polymer matrix is refracted and reflected multiple times, and the milky white scattering state is exhibited.
  • the optical properties of the PDLC layer largely depend on the properties of the liquid crystal molecules themselves. Since the physical properties of the negative liquid crystal have certain defects, the trans PDLC layer prepared by using the negative liquid crystal has the disadvantages of high driving voltage 4 ⁇ and low contrast. Summary of the invention
  • a liquid crystal display panel includes a first substrate and a second substrate disposed opposite to each other, and a PDLC layer disposed between the first substrate and the second substrate.
  • the PDLC layer is formed by polymerizing a positive liquid crystal and a polymer matrix and the positive liquid crystal is initialized to Arranged perpendicular to the substrate.
  • the liquid crystal display panel further includes:
  • first transparent electrode unit disposed on a side of the first substrate facing the second substrate, wherein the first transparent electrode unit is connected to the switching element;
  • a second transparent electrode unit disposed on a side of the second substrate facing the first substrate, wherein the second transparent electrode unit is connected to the first voltage
  • the third transparent electrode unit disposed on the first substrate and the second substrate, the third transparent electrode unit includes a plurality of third transparent electrodes, each of the third transparent electrodes having a predetermined height and connected to the second voltage The second voltage is opposite to the polarity of the first voltage, and the third transparent electrode unit is insulated from the first transparent electrode unit and the second transparent electrode unit.
  • the first transparent electrode unit includes a plurality of first transparent electrodes spaced apart on the first substrate
  • the second transparent electrode unit includes a plurality of second transparent spacers arranged on the second substrate electrode.
  • the second transparent electrode is disposed opposite to the first transparent electrode.
  • the third transparent electrode unit includes a plurality of third transparent electrodes alternately disposed on the first substrate and the second substrate, and the third transparent electrode on the first substrate is disposed on the adjacent first transparent electrode A third transparent electrode on the second substrate is disposed between the adjacent second transparent electrodes.
  • the third transparent electrode disposed on the first substrate and the third transparent electrode disposed on the second substrate are not opposed to each other.
  • the third transparent electrode is higher than the first transparent electrode and the second transparent electrode.
  • the height of the third transparent electrode satisfies l/2D ⁇ h ⁇ D, where D is the thickness of the PDLC layer and h is the height of the third transparent electrode.
  • the third transparent electrode has a cylindrical shape, a mountain shape or a wedge shape.
  • the liquid crystal display panel further includes:
  • a first alignment layer disposed between the PDLC layer and the first transparent electrode unit
  • a second alignment layer is disposed between the PDLC layer and the second transparent electrode unit.
  • a display device comprising any of the liquid crystal display panels as described above.
  • a method for driving a liquid crystal display panel as described above comprising: when the liquid crystal display panel is powered on, the second transparent electrode The first voltage is applied, the third transparent electrode unit is applied with the second voltage having a polarity opposite to the first voltage, and the switching element controls the first transparent electrode unit to have the The first voltages are of the same polarity such that the polarities of the first transparent electrode unit and the second transparent electrode unit are opposite to the polarities of the third transparent electrode unit.
  • a method for fabricating a liquid crystal display panel includes:
  • a third transparent electrode unit connected to the second voltage on a side of the first substrate on which the first transparent electrode unit is disposed and a side of the second substrate on which the second transparent electrode unit is disposed, wherein the third transparent electrode unit includes a plurality of third transparent electrodes, each of the third transparent electrodes having a predetermined height, the third transparent electrode unit being insulated from the first transparent electrode unit and the second transparent electrode unit, the second voltage and the Said that the polarity of the first voltage is opposite;
  • One side of the first substrate on which the first transparent electrode unit is disposed is placed opposite to the side on which the second substrate is provided with the second transparent electrode unit;
  • the PDLC layer initializes the PDLC layer such that the positive liquid crystals are aligned perpendicular to the substrate.
  • the forming a first transparent electrode unit connected to the switching element on the first substrate, and forming the second transparent electrode unit connected to the first voltage on the second substrate comprises:
  • a plurality of first transparent electrodes arranged in a space are formed on the first substrate, and a plurality of second transparent electrodes arranged in a space are formed on the second substrate.
  • the second transparent electrode is disposed opposite to the first transparent electrode.
  • forming a third transparent electrode unit connected to the second voltage on the first substrate and the second substrate comprises:
  • the third transparent electrode disposed on the first substrate and the third transparent electrode disposed on the second substrate are not opposed to each other.
  • forming a plurality of third transparent electrodes alternately disposed on the first substrate and on the second substrate includes:
  • a transparent insulating structure is first formed by using a transparent insulating material, and a transparent conductive layer is coated on the transparent insulating structure to form a third transparent electrode.
  • the initializing the PDLC layer such that the positive liquid crystal is perpendicular to the substrate arrangement comprises:
  • the first voltage is applied to the second transparent electrode unit when the PDLC layer is formed, and the first transparent electrode unit is controlled to have a polarity opposite to the second transparent electrode unit by the switching element, thereby Forming an electric field perpendicular to the substrate between the first transparent electrode unit and the second transparent electrode unit such that liquid crystal molecules of the PDLC layer are aligned perpendicular to the substrate while curing the PDLC layer; or
  • first transparent electrode unit and the second transparent electrode unit After forming the first transparent electrode unit and the second transparent electrode unit, one side of the first substrate on which the first transparent electrode is disposed and one side of the second substrate on which the second transparent electrode is disposed are coated with a vertical orientation
  • the alignment material is cured and the alignment material is cured to form a vertically oriented alignment layer.
  • the initializing the PDLC layer such that the positive liquid crystal is perpendicular to the substrate arrangement comprises:
  • the first voltage is applied to the second transparent electrode unit when the PDLC layer is formed, and the first transparent electrode unit is controlled to have a polarity opposite to the second transparent electrode unit by the switching element, thereby Forming an electric field perpendicular to the substrate between the first transparent electrode unit and the second transparent electrode unit such that liquid crystal molecules of the PDLC layer are aligned perpendicular to the substrate while performing curing of the PDLC layer;
  • first transparent electrode unit and the second transparent electrode unit After forming the first transparent electrode unit and the second transparent electrode unit, one side of the first substrate on which the first transparent electrode is disposed and one side of the second substrate on which the second transparent electrode is disposed are coated with a vertical orientation The alignment material is cured and the alignment material is cured to form a vertically oriented alignment layer.
  • 1 is a schematic view of a liquid crystal display panel according to an embodiment of the present invention
  • 2 is a schematic diagram of an electric field when a PDLC layer is initialized in a liquid crystal display panel according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a liquid crystal display panel when powered according to an embodiment of the invention. detailed description
  • Embodiments of the present invention provide a liquid crystal display panel, a driving method thereof, a manufacturing method, and a display device capable of reducing a driving voltage of a trans PDLC layer and improving contrast of a trans PDLC layer.
  • Embodiments of the present invention provide a liquid crystal display panel including a first substrate and a second substrate disposed opposite to each other, and a PDLC layer disposed between the first substrate and the second substrate, wherein the PDLC layer is composed of a positive liquid crystal And polymerizing the polymer matrix, the liquid crystal display panel further includes:
  • first transparent electrode unit disposed on a side of the first substrate facing the second substrate, wherein the first transparent electrode unit is connected to the switching element;
  • a second transparent electrode unit disposed on a side of the second substrate facing the first substrate, wherein the second transparent electrode unit is connected to the first voltage
  • the third transparent electrode unit disposed on the first substrate and the second substrate, the third transparent electrode unit includes a plurality of third transparent electrodes, each of the third transparent electrodes having a predetermined height and connected to the second voltage The second voltage is opposite to the polarity of the first voltage, and the third transparent electrode unit is insulated from the first transparent electrode unit and the second transparent electrode unit.
  • the second transparent electrode unit when the liquid crystal display panel is powered up, the second transparent electrode unit is applied with the first voltage, and the third transparent electrode unit is applied with the second voltage having a polarity opposite to the first voltage.
  • the switching element controls the first transparent electrode unit to have the same polarity as the first voltage, such that the polarities of the first transparent electrode unit and the second transparent electrode unit are opposite to the polarity of the third transparent electrode unit.
  • the liquid crystal molecules of the PDLC layer are disorderly arranged.
  • the liquid crystal display panel is powered off, since the PDLC layer undergoes an initialization process, the liquid crystal molecules of the PDLC layer are perpendicular to The substrate is arranged. The initialization process for the PDLC layer will be described in detail below.
  • the liquid crystal display panel includes: a first alignment layer disposed between the PDLC layer and the first transparent electrode unit, and a second alignment layer disposed between the PDLC layer and the second transparent electrode unit, first Both the alignment layer and the second alignment layer are vertically oriented.
  • the first transparent electrode unit includes a plurality of first transparent electrodes spaced apart on the first substrate
  • the second transparent electrode unit includes a plurality of spaced apart on the second substrate
  • the second transparent electrode is disposed opposite to the first transparent electrode. If the first transparent electrode and the second transparent electrode are not disposed opposite each other, the initialization process of the PDLC layer may be affected, and the transmittance of the panel when the power is off is not high enough to reduce the contrast.
  • the third transparent electrode unit includes a plurality of third transparent electrodes having a predetermined height, wherein the height of the third transparent electrode satisfies l/2D ⁇ h ⁇ D, and D is the thickness of the PDLC layer. , h is the height of the third transparent electrode.
  • the third transparent electrode may be disposed on the first substrate, or on the second substrate, or may be disposed on the first substrate and the second substrate at the same time.
  • the third transparent electrodes are alternately disposed on the first substrate and the second substrate, that is, for the third transparent electrode of the same row, the third transparent electrodes of the odd columns are disposed on the first substrate
  • the third transparent electrode of the even column is disposed on the second substrate.
  • the third transparent electrode on the first substrate and the third transparent electrode on the second substrate are not opposed to each other.
  • a third transparent electrode on the first substrate is disposed between the adjacent second transparent electrodes, and a third transparent electrode on the second substrate is disposed between the adjacent first transparent electrodes. If the third transparent electrode is disposed on only one substrate, compared with the case where the third transparent electrode is disposed on the two substrates, the electric field formed when the liquid crystal display panel is powered up is not particularly disordered, and the disorder of the liquid crystal molecules is not high enough. Causes a decrease in the degree of scattering.
  • the switching element is a TFT (Thin Film Transistor).
  • the third transparent electrode has a predetermined height, that is, the height of the third transparent electrode is higher than the first transparent electrode and the second transparent electrode, so that the third transparent electrode can be adjacent to the first transparent electrode or
  • the second transparent electrode forms a disordered electric field. There is no requirement for the height of the first transparent electrode and the second transparent electrode.
  • the heights of the plurality of third transparent electrodes may be different from each other as long as they are higher than the first transparent electrode and the second transparent electrode.
  • the plurality of third transparent electrodes have the same height, and at least the third transparent electrodes on the first substrate have the same height and are on the second substrate The third transparent electrodes have the same height for ease of fabrication.
  • the third transparent electrode may be in the shape of a cylinder, a mountain, a wedge, or the like.
  • the shape of the mountain is a low shape on both sides of the middle and can also be described as 'mountain, glyph.
  • the plurality of transparent conductive layers may be overlapped by printing to form a third transparent electrode, or a transparent insulating material such as a resin may be used first to form a transparent insulating structure, and then the transparent conductive structure may be coated with a transparent conductive layer. The layer is formed to form a third transparent electrode.
  • the first transparent electrode unit, the second transparent electrode unit, and the third transparent electrode unit are all uncharged, and the liquid crystal molecules are arranged perpendicular to the substrate, so that the incident light does not reflect after coming in.
  • the second transparent electrode unit is applied with a first voltage
  • the third transparent electrode unit is applied with a second voltage having a polarity opposite to the first voltage
  • the switching element controls the first transparent
  • the electrode unit has the same polarity as the first voltage, such that the polarities of the first transparent electrode unit and the second transparent electrode unit are opposite to the polarity of the third transparent electrode unit, and the direction of the electric field is higher
  • the liquid crystal molecules are arranged in the direction of the electric field, so the liquid crystals are arranged in a disordered arrangement. After the incident light comes in, the liquid crystal molecules and the polymer matrix are refracted and reflected multiple times, and the milky white scattering state is displayed.
  • the preparation of the trans PDLC layer by the positive liquid crystal can be realized by the arrangement of the first transparent electrode unit, the second transparent electrode unit, and the third transparent electrode unit. Since the physical properties of the positive liquid crystal are superior to those of the negative liquid crystal, the liquid crystal display panel according to the embodiment of the present invention can lower the driving voltage of the trans PDLC layer and improve the trans type as compared with the case where the negative liquid crystal is used to prepare the trans PDLC layer. The contrast of the PDLC layer greatly improves the electro-optic performance of the trans PDLC layer.
  • Embodiments of the present invention also provide a display device including the liquid crystal display panel as described above.
  • the display device may be: an electronic paper, an OLED (Organic Light Emitting Diode) display panel, a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, or the like having any display function.
  • OLED Organic Light Emitting Diode
  • the embodiment of the present invention further provides a driving method of the above liquid crystal display panel, comprising: when the liquid crystal display panel is powered on, the second transparent electrode unit is applied with a first voltage, and the third transparent electrode unit is applied with the first a second voltage having a reverse polarity of voltage, said switching element controlling A transparent electrode unit has the same polarity as the first voltage, such that the polarities of the first transparent electrode unit and the second transparent electrode unit are opposite to the polarity of the third transparent electrode unit.
  • the embodiment of the invention further provides a method for fabricating a liquid crystal display panel, comprising:
  • a third transparent electrode unit connected to the second voltage on a side of the first substrate on which the first transparent electrode unit is disposed and a side of the second substrate on which the second transparent electrode unit is disposed, wherein the third transparent electrode unit includes a plurality of third transparent electrodes, each of the third transparent electrodes having a predetermined height, the third transparent electrode unit being insulated from the first transparent electrode unit and the second transparent electrode unit, the second voltage and the Said that the polarity of the first voltage is opposite;
  • One side of the first substrate on which the first transparent electrode unit is disposed is placed opposite to the side on which the second substrate is provided with the second transparent electrode unit;
  • a PDLC layer obtained by polymerizing a positive liquid crystal and a polymer matrix is filled between the first substrate and the second substrate, and the PDLC layer is initialized so that the positive liquid crystal is aligned perpendicular to the substrate.
  • initialization can be performed in the following manners.
  • the vertically oriented alignment material is cured and the alignment material is cured to form a vertically oriented alignment layer.
  • the liquid crystal molecules of the PDLC layer are aligned perpendicular to the substrate by the vertically oriented alignment layer.
  • the alignment material is a polyimide liquid.
  • the forming a first transparent electrode unit connected to the switching element on the first substrate, and forming the second transparent electrode unit connected to the first voltage on the second substrate comprises:
  • a plurality of first transparent electrodes arranged in a space are formed on the first substrate, and a plurality of second transparent electrodes arranged in a space are formed on the second substrate.
  • the third transparent electrode unit includes a plurality of third transparent electrodes having a predetermined height, wherein the height of the third transparent electrode satisfies l/2D ⁇ h ⁇ D, and D is the thickness of the PDLC layer. , h is the height of the third transparent electrode.
  • the third transparent electrode may be disposed on the first substrate, or on the second substrate, or may be disposed on the first substrate and the second substrate at the same time.
  • the third transparent electrodes may be alternately disposed on the first substrate and the second substrate, that is, for the third transparent electrode of the same row, the third transparent electrodes of the odd columns are disposed at the first On the substrate, an even number of third transparent electrodes are disposed on the second substrate.
  • the third transparent electrode on the first substrate and the third transparent electrode on the second substrate are not opposed to each other.
  • a third transparent electrode on the first substrate is disposed between the adjacent second transparent electrodes, and a third transparent electrode on the second substrate is disposed between the adjacent first transparent electrodes.
  • forming the third transparent electrode unit connected to the second voltage comprises:
  • the third transparent electrode may be in the shape of a cylinder, a mountain, a wedge, or the like.
  • the plurality of transparent conductive layers may be overlapped by printing to form a third transparent electrode, or a transparent insulating material such as a resin may be used first to form a transparent insulating structure, and then the transparent conductive structure may be coated with a transparent conductive layer. The layer is formed to form a third transparent electrode.
  • the first transparent electrode and the second transparent electrode are made of indium tin oxide (Indium Tin) Oxides, ITO) and other transparent conductive materials are prepared.
  • ITO indium Tin Oxides
  • the first transparent electrode unit, the second transparent electrode unit and the third transparent electrode unit are all uncharged, and the liquid crystal molecules are arranged perpendicular to the substrate, so that the incident light does not occur after entering the light.
  • the second transparent electrode unit is applied with a first voltage
  • the third transparent electrode unit is applied with a second voltage having a polarity opposite to the first voltage
  • the switching element controls the first
  • the transparent electrode unit has the same polarity as the first voltage, such that the polarities of the first transparent electrode unit and the second transparent electrode unit are opposite to the polarity of the third transparent electrode unit, and the direction of the electric field at this time
  • the disordered liquid crystal molecules are arranged in the direction of the electric field to form an disordered arrangement. Therefore, after the incident light comes in, the refractive index is reflected and reflected multiple times at the interface between the liquid crystal molecules and the polymer matrix, and the milky white scattering state is displayed.
  • the preparation of the trans PDLC layer using positive liquid crystals can be achieved by the arrangement of the first transparent electrode unit, the second transparent electrode unit, and the third transparent electrode unit. Since the physical properties of the positive liquid crystal are superior to those of the negative liquid crystal, the liquid crystal display panel according to the embodiment of the present invention can lower the driving voltage of the trans PDLC layer and improve the trans type as compared with the case where the negative liquid crystal is used to prepare the trans PDLC layer. The contrast of the PDLC layer greatly improves the electro-optic performance of the trans PDLC layer.
  • a liquid crystal display panel includes a first substrate 2 and a second substrate 1 disposed opposite to each other, and a PDLC layer 6 formed between the first substrate 2 and the second substrate 1.
  • the first substrate 2 is provided with a first transparent electrode unit 4 connected to the switching element and a third transparent electrode 5 connected to the second voltage.
  • the switching element is a TFT.
  • the first transparent electrode unit 4 is composed of a plurality of first transparent electrodes arranged at intervals.
  • the third transparent electrode 5 is disposed between adjacent first transparent electrodes.
  • a second transparent electrode unit 3 connected to the first voltage and a third transparent electrode 5 connected to the second voltage are disposed on the second substrate 1.
  • the second transparent electrode unit 3 is composed of a plurality of second transparent electrodes arranged at intervals.
  • the third transparent electrode 5 is disposed between adjacent second transparent electrodes.
  • the first transparent electrode and the second transparent electrode are disposed opposite each other.
  • the third transparent electrode 5 on the first substrate 2 and the third transparent electrode 5 on the second substrate 1 are alternately arranged, which is advantageous in forming a relatively uniform electric field.
  • the third transparent electrode 5 on the first substrate 2 and the third transparent electrode 5 on the second substrate 1 may be collectively referred to as a third transparent electrode unit.
  • the third transparent electrode 5 has a preset height. For example, the height of the third transparent electrode 5 is less than The thickness of the PDLC layer is greater than half the thickness of the PDLC layer.
  • the third transparent electrode 5 may have a shape of a cylinder, a mountain shape, a wedge shape or the like.
  • the plurality of transparent conductive layers may be overlapped by printing to form the third transparent electrode 5.
  • a transparent insulating material such as a resin may be used to form a transparent insulating structure, and then coated on the transparent insulating structure.
  • the transparent conductive layer is formed to form the third transparent electrode 5.
  • the liquid crystal display panel further includes: a first alignment layer (not shown) disposed between the PDLC layer 6 and the first transparent electrode unit 4, and a second disposed between the PDLC layer 6 and the second transparent electrode unit 3
  • the alignment layer (not shown), the first alignment layer and the second alignment layer are all vertically oriented.
  • the PDLC layer 6 is composed of a positive liquid crystal and a polymer matrix. As shown in FIG. 2, a voltage needs to be applied to the first transparent electrode unit 4 and the second transparent electrode unit 3 during the initialization of the PDLC layer, and the voltage applied to the second transparent electrode unit 3 is the first voltage, and the control switch is passed.
  • the element applies a voltage opposite to the polarity of the first voltage on the first transparent electrode unit 4, thereby forming an electric field perpendicular to the substrate between the first transparent electrode unit 4 and the second transparent electrode unit 3.
  • the positive liquid crystal molecules in the PDLC layer are aligned in the direction of the electric field by the electric field to be oriented perpendicular to the substrate, and at the same time, the PDLC layer is cured. After the initialization of the PDLC layer is completed, the liquid crystal display panel according to an embodiment of the present invention can be put into use.
  • the first transparent electrode, the second transparent electrode, and the third transparent electrode are both uncharged, and the positive liquid crystal molecules are perpendicular to the substrate drain ij due to the initialization process, so that the incident light comes in.
  • the second transparent electrode is applied with the first voltage
  • the third transparent electrode is applied with the second voltage
  • the first voltage is opposite to the polarity of the second voltage
  • the switching element causes the first transparent electrode to have the same polarity as the first voltage, thereby forming an electric field as shown in FIG.
  • the liquid crystal molecules are arranged along the direction of the electric field.
  • the arrangement of the liquid crystal molecules is also irregular, so that the incident light enters and refracts and reflects multiple times at the interface between the liquid crystal molecules and the polymer matrix. Shows the milky white scattering state.
  • the preparation of the trans PDLC layer by the positive liquid crystal can be realized by the arrangement of the first transparent electrode unit, the second transparent electrode unit and the third transparent electrode unit. Since the physical properties of the positive liquid crystal are superior to those of the negative liquid crystal, the liquid crystal display panel of the embodiment of the present invention can reduce the driving voltage of the trans PDLC layer and improve the trans PDLC compared to the case where the negative liquid crystal is used to prepare the trans PDLC layer. The contrast of the layer greatly improves the electro-optical properties of the trans-PDLC layer.

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Abstract

一种液晶显示面板及其驱动方法和制作方法、显示装置。液晶显示面板包括相对设置的第一基板（2）和第二基板（1），以及设置在第一基板（2）和第二基板（1）之间的PDLC层（6）。PDLC层（6）由正性液晶和高分子基体聚合而成且正性液晶被初始化为垂直于基板排列。液晶显示面板还包括：第一透明电极单元（4），设置在第一基板（2）朝向第二基板（1）一面上，第一透明电极单元（4）与开关元件连接；第二透明电极单元（3），设置在第二基板（1）朝向第一基板（2）的一面上，第二透明电极单元（3）与第一电压连接；第三透明电极单元，设置在第一基板（2）和第二基板（1）上，第三透明电极单元包括多个第三透明电极（5），每一第三透明电极（5）具有预设高度且与第二电压连接，第二电压与第一电压的极性相反，第三透明电极单元与第一透明电极单元（4）和第二透明电极单元（3）绝缘。

Description

液晶显示面板及其驱动方法和制作方法、 显示装置 技术领域
本发明的实施例涉及一种液晶显示面板及其驱动方法和制作方法、 显示 装置。 背景技术
PDLC ( polymer dispersed liquid crystal, 聚合物分散液晶）可以用来形成 LCD ( Liquid Crystal Display, 液晶显示器） 中的液晶层以用作显示介质， 它 具有利用光散射强度控制光传输且不需要偏振板的特性。 PDLC通常包括液 晶分子和高分子基体。 PDLC层的光学特性很大程度上依赖于液晶分子的有 效折射率以及与高分子基体的匹配。
普通 PDLC层一般利用正性液晶制备。 在没有施加电压时， 液晶分子是 无序排列的， 因此入射光进来以后在液晶分子与高分子基体的界面上多次发 生折射与反射， 而显示乳白色的散射态； 在施加电压时， 液晶分子是沿着电 场的方向排列， 从而入射光进来以后不发生反射和折射而直接透射出来。
反式 PDLC层一般是采用负性液晶来制备。 在没有施加电压时， 液晶分 子是垂直于基板排列，从而入射光进来后不发生反射和折射而直接透射出来； 在施加电压时， 液晶分子是垂直于电场的方向排列， 因此入射光进来以后在 液晶分子与高分子基体的界面上多次发生折射与反射， 而显示乳白色的散射 态。
PDLC层的光学性能很大程度上依赖于液晶分子本身的特性。 由于负性 液晶的物理性能存在一定的缺陷， 这导致利用负性液晶制备的反式 PDLC层 具有驱动电压 4艮高、 对比度低等缺点。 发明内容
根据本发明实施例的一个方面， 提供一种液晶显示面板， 包括相对设置 的第一基板和第二基板， 以及设置在第一基板和第二基板之间的 PDLC层。 所述 PDLC层由正性液晶和高分子基体聚合而成且所述正性液晶被初始化为 垂直于基板排列。 所述液晶显示面板还包括：
第一透明电极单元， 设置在所述第一基板朝向所述第二基板的一面上， 所述第一透明电极单元与开关元件连接；
第二透明电极单元， 设置在所述第二基板朝向所述第一基板的一面上， 所述第二透明电极单元与第一电压连接；
第三透明电极单元， 设置在第一基板和第二基板上， 所述第三透明电极 单元包括多个第三透明电极， 所述每一第三透明电极具有预设高度且与第二 电压连接， 所述第二电压与所述第一电压的极性相反， 所述第三透明电极单 元与所述第一透明电极单元和第二透明电极单元绝缘。
例如， 所述第一透明电极单元包括间隔排列在所述第一基板上的多个第 一透明电极， 所述第二透明电极单元包括间隔排列在所述第二基板上的多个 第二透明电极。
例如， 所述第二透明电极与所述第一透明电极——相对设置。
例如， 所述第三透明电极单元包括交替地设置在第一基板上和第二基板 上的多个第三透明电极， 位于第一基板上的第三透明电极设置在相邻的第一 透明电极之间， 位于第二基板上的第三透明电极设置在相邻的第二透明电极 之间。
例如， 所述设置在第一基板上的第三透明电极与所述设置在第二基板上 的第三透明电极不彼此相对。
例如， 所述第三透明电极高于所述第一透明电极和所述第二透明电极。 例如， 所述第三透明电极的高度满足 l/2D<h<D, 其中 D为 PDLC层的 厚度， h为第三透明电极的高度。
例如， 所述第三透明电极为圓柱形、 山形或楔形。
例如， 所述液晶显示面板还包括：
设置在 PDLC层与第一透明电极单元之间的第一取向层；
设置在 PDLC层与第二透明电极单元之间的第二取向层。
根据本发明实施例的另一个方面， 提供一种显示装置， 包括如上所述的 任一种液晶显示面板。
根据本发明实施例的再一个方面， 提供一种如上所述的任一种液晶显示 面板的驱动方法， 包括： 在所述液晶显示面板加电时， 所述第二透明电极单 元被施加所述第一电压， 所述第三透明电极单元被施加与所述第一电压极性 相反的所述第二电压， 所述开关元件控制所述第一透明电极单元具有与所述 第一电压相同的极性， 从而所述第一透明电极单元和所述第二透明电极单元 的极性与所述第三透明电极单元的极性相反。
根据本发明实施例的又一个方面， 提供一种液晶显示面板的制作方法， 包括：
在第一基板上形成与开关元件连接的第一透明电极单元；
在第二基板上形成与第一电压连接的第二透明电极单元；
在第一基板设有第一透明电极单元的一面上与第二基板设有第二透明电 极单元的一面上形成与第二电压连接的第三透明电极单元， 其中所述第三透 明电极单元包括多个第三透明电极， 每一所述第三透明电极具有预设高度， 所述第三透明电极单元与所述第一透明电极单元和第二透明电极单元绝缘， 所述第二电压与所述第一电压的极性相反；
将第一基板设有第一透明电极单元的一面与第二基板设有第二透明电极 单元的一面相对放置； 以及
在第一基板和第二基板之间填充由正性液晶和高分子基体聚合而成的
PDLC层， 对 PDLC层进行初始化以使所述正性液晶垂直于基板排列。
例如， 所述在第一基板上形成与开关元件连接的第一透明电极单元， 在 第二基板上形成与第一电压连接的第二透明电极单元包括：
在第一基板上形成间隔排列的多个第一透明电极， 在第二基板上形成间 隔排列的多个第二透明电极。
例如， 所述第二透明电极与所述第一透明电极——相对设置。
例如， 在第一基板和第二基板上形成与第二电压连接的第三透明电极单 元包括：
形成交替地设置在第一基板上和第二基板上的多个第三透明电极， 将第 一基板上的第三透明电极设置在相邻的第二透明电极之间， 将第二基板上的 第三透明电极设置在相邻的第一透明电极之间。
例如， 所述设置在第一基板上的第三透明电极与所述设置在第二基板上 的第三透明电极不彼此相对。
例如， 形成交替地设置在第一基板上和第二基板上的多个第三透明电极 包括：
采用印刷方式重叠多层透明导电层形成第三透明电极； 或
先采用透明绝缘材料形成透明绝缘结构， 再在所述透明绝缘结构上涂布 透明导电层形成第三透明电极。
例如， 所述对 PDLC层进行初始化以使所述正性液晶垂直于基板排列包 括：
在形成 PDLC层时， 在第二透明电极单元上施加所述第一电压， 利用所 述开关元件控制所述第一透明电极单元具有与所述第二透明电极单元相反的 极性， 从而在所述第一透明电极单元和所述第二透明电极单元之间形成垂直 于基板的电场， 使得所述 PDLC层的液晶分子垂直于基板排列， 同时进行 PDLC层的固化； 或者
在形成第一透明电极单元和第二透明电极单元之后， 在所述第一基板设 置有第一透明电极的一面及所述第二基板设置有第二透明电极的一面， 均涂 覆垂直取向的取向材料， 并使取向材料固化形成垂直取向的取向层。
例如， 所述对 PDLC层进行初始化以使所述正性液晶垂直于基板排列包 括：
在形成 PDLC层时， 在第二透明电极单元上施加所述第一电压， 利用所 述开关元件控制所述第一透明电极单元具有与所述第二透明电极单元相反的 极性， 从而在所述第一透明电极单元和所述第二透明电极单元之间形成垂直 于基板的电场， 使得所述 PDLC层的液晶分子垂直于基板排列， 同时进行 PDLC层的固化； 并且
在形成第一透明电极单元和第二透明电极单元之后， 在所述第一基板设 置有第一透明电极的一面及所述第二基板设置有第二透明电极的一面， 均涂 覆垂直取向的取向材料， 并使取向材料固化形成垂直取向的取向层。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 筒单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为根据本发明实施例的液晶显示面板的示意图； 图 2为在根据本发明实施例的液晶显示面板中 PDLC层初始化时的电场 示意图；
图 3为根据本发明实施例的液晶显示面板加电时的示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明实施例的技术方案进行清楚、 完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
本发明的实施例提供一种液晶显示面板及其驱动方法和制作方法、 显示 装置， 能够降低反式 PDLC层的驱动电压， 提高反式 PDLC层的对比度。
本发明实施例提供了一种液晶显示面板， 包括相对设置的第一基板和第 二基板，以及设置在第一基板和第二基板之间的 PDLC层，其中，所述 PDLC 层由正性液晶和高分子基体聚合而成， 所述液晶显示面板还包括：
设置在所述第一基板朝向第二基板的一面上的第一透明电极单元， 所述 第一透明电极单元与开关元件连接；
设置在所述第二基板朝向第一基板的一面上的第二透明电极单元， 所述 第二透明电极单元与第一电压连接；
设置在第一基板和第二基板上的第三透明电极单元， 所述第三透明电极 单元包括多个第三透明电极， 所述每一第三透明电极具有预设高度且与第二 电压连接， 所述第二电压与所述第一电压的极性相反， 所述第三透明电极单 元与所述第一透明电极单元和第二透明电极单元绝缘。
在一个示例中， 在所述液晶显示面板加电时， 第二透明电极单元被施加 所述第一电压， 第三透明电极单元被施加与所述第一电压极性相反的所述第 二电压， 所述开关元件控制第一透明电极单元具有与第一电压相同的极性， 从而所述第一透明电极单元和所述第二透明电极单元的极性与所述第三透明 电极单元的极性相反， 此时由于电场的方向较乱而液晶分子沿着电场的方向 排列，所以所述 PDLC层的液晶分子无序排列。在所述液晶显示面板断电时， 由于所述 PDLC层经历了初始化工艺， 所以所述 PDLC层的液晶分子垂直于 基板排列。 对于 PDLC层的初始化工艺， 将在下文进行详细的描述。
在一个示例中， 所述液晶显示面板包括： 设置在 PDLC层与第一透明电 极单元之间的第一取向层， 设置在 PDLC层与第二透明电极单元之间的第二 取向层， 第一取向层和第二取向层均为垂直取向。
在一个示例中， 所述第一透明电极单元包括间隔排列在所述第一基板上 的多个第一透明电极， 所述第二透明电极单元包括间隔排列在所述第二基板 上的多个第二透明电极。 例如， 所述第二透明电极与所述第一透明电极—— 相对设置。 所述第一透明电极与所述第二透明电极如果不是相对设置， 则对 PDLC层的初始化工艺会有一定的影响，导致面板断电时候的透过率不够高， 从而降低对比度。
在一个示例中， 所述第三透明电极单元包括多个具有预设高度的第三透 明电极， 其中， 所述第三透明电极的高度满足 l/2D<h<D, D为 PDLC层的 厚度， h 为第三透明电极的高度。 第三透明电极可以设置在第一基板上， 也 可以设置在第二基板上，还可以同时设置在第一基板和第二基板上。优选地， 为了优化电场分布， 第三透明电极交替地设置在第一基板上和第二基板上， 即对于同一行的第三透明电极来说， 奇数列的第三透明电极设置在第一基板 上， 偶数列的第三透明电极设置在第二基板上。 也就是， 第一基板上的第三 透明电极与第二基板上的第三透明电极不彼此相对。 位于第一基板上的第三 透明电极设置在相邻的第二透明电极之间， 位于第二基板上的第三透明电极 设置在相邻的第一透明电极之间。 如果第三透明电极只设置在一个基板上， 相比第三透明电极设置在两个基板上的情形， 液晶显示面板加电时形成的电 场不会特别乱， 液晶分子的无序度不够高， 导致散射度降低。
例如， 所述开关元件为 TFT ( Thin Film transistor, 薄膜晶体管） 。
需要说明的是， 第三透明电极具有预设高度是指第三透明电极的高度高 于第一透明电极和第二透明电极， 这样第三透明电极才可和与其相邻的第一 透明电极或第二透明电极形成杂乱的电场。 对于第一透明电极和第二透明电 极的高度没有要求。
需要说明的是， 多个第三透明电极的高度可以彼此不同， 只要它们的高 度高于第一透明电极和第二透明电极即可。 优选地， 多个第三透明电极具有 相同的高度， 至少第一基板上的第三透明电极具有相同的高度且第二基板上 的第三透明电极具有相同的高度， 以方便制作。
在一个示例中， 第三透明电极可以为圓柱形、 山形、 楔形等形状。 所述 山形为中间高两边低的形状， 也可以描述为 '山，字形。 在制作第三透明电极 时， 可以采用印刷方式重叠多层透明导电层以形成第三透明电极， 也可以先 采用透明绝缘材料比如树脂来形成透明绝缘结构， 再在透明绝缘结构上涂布 透明导电层以形成第三透明电极。
根据本发明实施例的液晶显示面板在断电时， 第一透明电极单元、 第二 透明电极单元和第三透明电极单元均不带电， 液晶分子垂直于基板排列， 从 而入射光进来后不发生反射和折射而直接透射出来； 在加电时， 第二透明电 极单元被施加第一电压， 第三透明电极单元被施加与第一电压极性相反的第 二电压， 所述开关元件控制第一透明电极单元具有与第一电压相同的极性， 从而所述第一透明电极单元和所述第二透明电极单元的极性与所述第三透明 电极单元的极性相反，此时电场的方向较乱而液晶分子沿着电场的方向排列， 所以液晶分在形成无序的排列， 入射光进来以后在液晶分子与高分子基体的 界面上多次发生折射与反射， 而显示乳白色的散射态。
在根据本发明实施例的液晶显示面板中， 通过第一透明电极单元、 第二 透明电极单元和第三透明电极单元的设置可以实现利用正性液晶制备反式 PDLC层。 由于正性液晶的物理性能优于负性液晶， 从而跟负性液晶制备反 式 PDLC层的情形相比， 根据本发明实施例的液晶显示面板能够降低反式 PDLC层的驱动电压， 提高反式 PDLC层的对比度， 大大改善反式 PDLC层 的电光性能。
本发明实施例还提供了一种显示装置， 包括如上所述的液晶显示面板。 夕卜， 显示装置其他部分的结构可以参考相关技术， 对此本文不再详细描述。 该显示装置可以为： 电子纸、 OLED ( Organic Light Emitting Diode, 有机发 光二极管）显示面板、 液晶电视、 液晶显示器、 数码相框、 手机、 平板电脑 等具有任何显示功能的产品或部件。
本发明实施例还提供了一种上述液晶显示面板的驱动方法， 包括： 在所述液晶显示面板加电时， 第二透明电极单元被施加第一电压， 第三 透明电极单元被施加与第一电压极性相反的第二电压， 所述开关元件控制第 一透明电极单元具有与第一电压相同的极性， 从而所述第一透明电极单元和 所述第二透明电极单元的极性与所述第三透明电极单元的极性相反。
本发明实施例还提供了一种液晶显示面板的制作方法， 包括：
在第一基板上形成与开关元件连接的第一透明电极单元；
在第二基板上形成与第一电压连接的第二透明电极单元；
在第一基板设有第一透明电极单元的一面上与第二基板设有第二透明电 极单元的一面上形成与第二电压连接的第三透明电极单元， 其中所述第三透 明电极单元包括多个第三透明电极， 每一所述第三透明电极具有预设高度， 所述第三透明电极单元与所述第一透明电极单元和第二透明电极单元绝缘， 所述第二电压与所述第一电压的极性相反；
将第一基板设有第一透明电极单元的一面与第二基板设有第二透明电极 单元的一面相对放置； 以及
在第一基板和第二基板之间填充由正性液晶和高分子基体聚合而成的 PDLC层， 对 PDLC层进行初始化以使所述正性液晶垂直于基板排列。
为了使正性液晶的初始取向为垂直取向， 可以采用以下几种方式来进行 初始化。
( 1 )在形成 PDLC层时， 在第二透明电极单元上施加第一电压， 利用 所述开关元件控制第一透明电极单元具有与第二透明电极单元相反的极性， 从而在第一透明电极单元和第二透明电极单元之间形成垂直于基板的电场， 使得所述 PDLC层的液晶分子垂直于基板排列， 同时进行 PDLC材料固化。 这样， 即使在断电时， 也可以使 PDLC层的液晶分子垂直于基板排列。
( 2 )在形成第一透明电极单元和第二透明电极单元之后， 在所述第一 基板设置有第一透明电极的一面及所述第二基板设置有第二透明电极的一 面，均涂覆垂直取向的取向材料，并使取向材料固化形成垂直取向的取向层。 在垂直取向的取向层的作用下， 所述 PDLC层的液晶分子垂直于基板排列。 例如， 所述取向材料为聚酰亚胺液。
( 3 )在形成第一透明电极单元和第二透明电极单元之后， 在所述第一 基板设置有第一透明电极的一面及所述第二基板设置有第二透明电极的一 面，均涂覆垂直取向的取向材料，并使取向材料固化形成垂直取向的取向层， 在垂直取向的取向层的作用下， 所述 PDLC层的液晶分子垂直于基板排列； 同时在形成 PDLC层时， 在第二透明电极单元上施加第一电压， 利用所 述开关元件控制第一透明电极单元具有与第二透明电极单元相反的极性， 从 而在第一透明电极单元和第二透明电极单元之间形成垂直于基板的电场， 使 得所述 PDLC层的液晶分子垂直于基板排列， 同时进行 PDLC材料固化， 这 样即使在断电时， 也可以使 PDLC层的液晶分子垂直于基板排列。
在上述三种方式中， 第三种方式的效果最好。
在一个示例中， 所述在第一基板上形成与开关元件连接的第一透明电极 单元， 在第二基板上形成与第一电压连接的第二透明电极单元包括：
在第一基板上形成间隔排列的多个第一透明电极， 在第二基板上形成间 隔排列的多个第二透明电极。 例如， 所述第二透明电极与所述第一透明电极
——相对设置。
在一个示例中， 所述第三透明电极单元包括多个具有预设高度的第三透 明电极， 其中， 所述第三透明电极的高度满足 l/2D<h<D, D为 PDLC层的 厚度， h 为第三透明电极的高度。 第三透明电极可以设置在第一基板上， 也 可以设置在第二基板上，还可以同时设置在第一基板和第二基板上。优选地， 为了优化电场分布， 第三透明电极可以交替地设置在第一基板上和第二基板 上， 即对于同一行的第三透明电极来说， 奇数列的第三透明电极设置在第一 基板上， 偶数列的第三透明电极设置在第二基板上。 也就是， 第一基板上的 第三透明电极与第二基板上的第三透明电极不彼此相对。 位于第一基板上的 第三透明电极设置在相邻的第二透明电极之间， 位于第二基板上的第三透明 电极设置在相邻的第一透明电极之间。
因此， 形成与第二电压连接的第三透明电极单元包括：
形成交替地设置在第一基板上和第二基板上的多个第三透明电极， 将第 一基板上的第三透明电极设置在相邻的第二透明电极之间， 将第二基板上的 第三透明电极设置在相邻的第一透明电极之间。
在一个示例中， 第三透明电极可以为圓柱形、 山形、 楔形等形状。 在制 作第三透明电极时， 可以采用印刷方式重叠多层透明导电层以形成第三透明 电极， 也可以先采用透明绝缘材料比如树脂来形成透明绝缘结构， 再在透明 绝缘结构上涂布透明导电层以形成第三透明电极。
例如， 第一透明电极和第二透明电极采用铟锡氧化物 （ Indium Tin Oxides, ITO )等透明导电材料制备。
本发明实施例制成的液晶显示面板在断电时， 第一透明电极单元、 第二 透明电极单元和第三透明电极单元均不带电， 液晶分子垂直于基板排列， 从 而入射光进来后不发生反射和折射而直接透射出来； 在加电时， 第二透明电 极单元被施加第一电压， 第三透明电极单元被施加与第一电压极性相反的第 二电压， 所述开关元件控制第一透明电极单元具有与第一电压相同的极性， 从而所述第一透明电极单元和所述第二透明电极单元的极性与所述第三透明 电极单元的极性相反， 此时电场的方向较乱， 液晶分子沿着电场的方向排列 而形成无序的排列， 因此入射光进来以后在液晶分子与高分子基体的界面上 多次发生折射与反射， 而显示乳白色的散射态。
根据本发明的实施例， 通过第一透明电极单元、 第二透明电极单元和第 三透明电极单元的设置可以实现利用正性液晶制备反式 PDLC层。 由于正性 液晶的物理性能优于负性液晶， 从而跟负性液晶制备反式 PDLC层的情形相 比， 根据本发明实施例的液晶显示面板能够降低反式 PDLC层的驱动电压， 提高反式 PDLC层的对比度， 大大改善反式 PDLC层的电光性能。
下面， 将结合附图对根据本发明实施例的液晶显示面板的结构及其工作 原理进行详细介绍。
如图 1所示， 根据本发明实施例的液晶显示面板包括彼此相对设置的第 一基板 2和第二基板 1、 以及形成在第一基板 2和第二基板 1之间的 PDLC 层 6。 在第一基板 2上设置有与开关元件连接的第一透明电极单元 4和与第 二电压连接的第三透明电极 5。 例如， 开关元件为 TFT。 第一透明电极单元 4由多个间隔排列的第一透明电极组成。 第三透明电极 5设置在相邻的第一 透明电极之间。 在第二基板 1上设置有与第一电压连接的第二透明电极单元 3和与第二电压连接的第三透明电极 5。第二透明电极单元 3由多个间隔排列 的第二透明电极组成。 第三透明电极 5设置在相邻的第二透明电极之间。 例 如， 第一透明电极与第二透明电极——相对设置。 例如， 第一基板 2上的第 三透明电极 5与第二基板 1上的第三透明电极 5交替设置， 这样可有利于形 成比较均匀的电场。 第一基板 2上的第三透明电极 5与第二基板 1上的第三 透明电极 5可以统称为第三透明电极单元。
第三透明电极 5 具有预设的高度。 例如， 第三透明电极 5 的高度小于 PDLC层的厚度， 但是大于 PDLC层的厚度的一半。 第三透明电极 5可以为 圓柱形、 山形、 楔形等形状。 在制作第三透明电极 5时， 可以采用印刷方式 重叠多层透明导电层以形成第三透明电极 5, 也可以先采用透明绝缘材料比 如树脂来形成透明绝缘结构， 再在透明绝缘结构上涂布透明导电层以形成第 三透明电极 5。
例如， 液晶显示面板还包括： 设置在 PDLC层 6与第一透明电极单元 4 之间的第一取向层（未示出） ， 设置在 PDLC层 6与第二透明电极单元 3之 间的第二取向层（未示出） ， 第一取向层和第二取向层均为垂直取向。
PDLC层 6由正性液晶和高分子基体组成。 如图 2所示， 在 PDLC层初 始化过程中需要在第一透明电极单元 4和第二透明电极单元 3上施加电压， 第二透明电极单元 3上施加的电压即为第一电压， 通过控制开关元件在第一 透明电极单元 4上施加与第一电压极性相反的电压， 由此在第一透明电极单 元 4和第二透明电极单元 3之间形成垂直于基板的电场。 PDLC层中的正性 液晶分子在电场的作用下沿电场方向排列，从而垂直于基板取向，与此同时， 对 PDLC层进行固化。 在 PDLC层初始化完成之后， 根据本发明实施例的液 晶显示面板即可投入使用。
根据本发明实施例的液晶显示面板在断电时， 第一透明电极、 第二透明 电极和第三透明电极均不带电， 由于初始化工艺正性液晶分子垂直于基板排 歹 ij , 从而入射光进来后不发生反射和折射而直接透射出来； 在加电时， 第二 透明电极被施加第一电压， 第三透明电极被施加第二电压， 第一电压与第二 电压的极性相反， 通过控制开关元件使第一透明电极具有与第一电压相同的 极性， 从而形成如图 3所示的电场。 液晶分子沿着电场的方向排列， 由于电 场的方向较乱， 因此液晶分子形成的排列也都没规律， 从而入射光进来以后 在液晶分子与高分子基体的界面上多次发生折射与反射， 而显示乳白色的散 射态。
本发明实施例通过第一透明电极单元、 第二透明电极单元和第三透明电 极单元的设置可以实现利用正性液晶制备反式 PDLC层。 由于正性液晶的物 理性能优于负性液晶， 从而跟负性液晶制备反式 PDLC层的情形相比， 本发 明实施例的液晶显示面板能够降低反式 PDLC 层的驱动电压， 提高反式 PDLC层的对比度， 大大改善反式 PDLC层的电光性能。 以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、一种液晶显示面板， 包括相对设置的第一基板和第二基板， 以及设置 在第一基板和第二基板之间的 PDLC层， 其中
所述 PDLC层由正性液晶和高分子基体聚合而成且所述正性液晶被初始 化为垂直于基板排列； 并且
所述液晶显示面板还包括：
第一透明电极单元， 设置在所述第一基板朝向所述第二基板的一面上， 所述第一透明电极单元与开关元件连接；
第二透明电极单元， 设置在所述第二基板朝向所述第一基板的一面上， 所述第二透明电极单元与第一电压连接；
第三透明电极单元， 设置在第一基板和第二基板上， 所述第三透明电极 单元包括多个第三透明电极， 所述每一第三透明电极具有预设高度且与第二 电压连接， 所述第二电压与所述第一电压的极性相反， 所述第三透明电极单 元与所述第一透明电极单元和第二透明电极单元绝缘。
2、根据权利要求 1所述的液晶显示面板，其中所述第一透明电极单元包 括间隔排列在所述第一基板上的多个第一透明电极， 所述第二透明电极单元 包括间隔排列在所述第二基板上的多个第二透明电极。
3、根据权利要求 2所述的液晶显示面板，其中所述第二透明电极与所述 第一透明电极——相对设置。
4、根据权利要求 2或 3所述的液晶显示面板，其中所述第三透明电极单 元包括交替地设置在第一基板上和第二基板上的多个第三透明电极， 位于第 一基板上的第三透明电极设置在相邻的第一透明电极之间， 位于第二基板上 的第三透明电极设置在相邻的第二透明电极之间。
5、根据权利要求 4所述的液晶显示面板，其中所述设置在第一基板上的 第三透明电极与所述设置在第二基板上的第三透明电极不彼此相对。
6、根据权利要求 2-5中任一项所述的液晶显示面板， 其中所述第三透明 电极高于所述第一透明电极和所述第二透明电极。
7、根据权利要求 2-6中任一项所述的液晶显示面板， 其中所述第三透明 电极的高度满足 l/2D<h<D, 其中 D为 PDLC层的厚度， h为第三透明电极 的高度。
8、根据权利要求 1-7中任一项所述的液晶显示面板， 其中所述第三透明 电极为圓柱形、 山形或楔形。
9、根据权利要求 1-8中任一项所述的液晶显示面板， 其中所述液晶显示 面板还包括：
设置在 PDLC层与第一透明电极单元之间的第一取向层；
设置在 PDLC层与第二透明电极单元之间的第二取向层。
10、一种显示装置， 包括如权利要求 1-9中任一项所述的液晶显示面板。
11、 一种如权利要求 1-9中任一项所述液晶显示面板的驱动方法， 其中 包括：
在所述液晶显示面板加电时， 所述第二透明电极单元被施加所述第一电 压，所述第三透明电极单元被施加与所述第一电压极性相反的所述第二电压， 所述开关元件控制所述第一透明电极单元具有与所述第一电压相同的极性， 从而所述第一透明电极单元和所述第二透明电极单元的极性与所述第三透明 电极单元的极性相反。
12、 一种液晶显示面板的制作方法， 包括：
在第一基板上形成与开关元件连接的第一透明电极单元；
在第二基板上形成与第一电压连接的第二透明电极单元；
在第一基板设有第一透明电极单元的一面上与第二基板设有第二透明电 极单元的一面上形成与第二电压连接的第三透明电极单元， 其中所述第三透 明电极单元包括多个第三透明电极， 每一所述第三透明电极具有预设高度， 所述第三透明电极单元与所述第一透明电极单元和第二透明电极单元绝缘， 所述第二电压与所述第一电压的极性相反；
将第一基板设有第一透明电极单元的一面与第二基板设有第二透明电极 单元的一面相对放置； 以及
在第一基板和第二基板之间填充由正性液晶和高分子基体聚合而成的
PDLC层， 对 PDLC层进行初始化以使所述正性液晶垂直于基板排列。
13、根据权利要求 12所述的液晶显示面板的制作方法，其中所述在第一 基板上形成与开关元件连接的第一透明电极单元， 在第二基板上形成与第一 电压连接的第二透明电极单元包括： 在第一基板上形成间隔排列的多个第一透明电极， 在第二基板上形成间 隔排列的多个第二透明电极。
14、根据权利要求 13所述的液晶显示面板的制作方法，其中所述第二透 明电极与所述第一透明电极——相对设置。
15、 根据权利要求 12或 13所述的液晶显示面板的制作方法， 其中在第 一基板和第二基板上形成与第二电压连接的第三透明电极单元包括：
形成交替地设置在第一基板上和第二基板上的多个第三透明电极， 将第 一基板上的第三透明电极设置在相邻的第二透明电极之间， 将第二基板上的 第三透明电极设置在相邻的第一透明电极之间。
16、根据权利要求 15所述的液晶显示面板的制作方法，其中所述设置在 第一基板上的第三透明电极与所述设置在第二基板上的第三透明电极不彼此 相对。
17、 根据权利要求 15或 16所述的液晶显示面板的制作方法， 其中形成 交替地设置在第一基板上和第二基板上的多个第三透明电极包括：
采用印刷方式重叠多层透明导电层形成第三透明电极； 或
先采用透明绝缘材料形成透明绝缘结构， 再在所述透明绝缘结构上涂布 透明导电层形成第三透明电极。
18、 根据权利要求 12-17中任一项所述液晶显示面板的制作方法， 其中 所述对 PDLC层进行初始化以使所述正性液晶垂直于基板排列包括：
在形成 PDLC层时， 在第二透明电极单元上施加所述第一电压， 利用所 述开关元件控制所述第一透明电极单元具有与所述第二透明电极单元相反的 极性， 从而在所述第一透明电极单元和所述第二透明电极单元之间形成垂直 于基板的电场， 使得所述 PDLC层的液晶分子垂直于基板排列， 同时进行 PDLC层的固化； 或者
在形成第一透明电极单元和第二透明电极单元之后， 在所述第一基板设 置有第一透明电极的一面及所述第二基板设置有第二透明电极的一面， 均涂 覆垂直取向的取向材料， 并使取向材料固化形成垂直取向的取向层。
19、 根据权利要求 12-17中任一项所述液晶显示面板的制作方法， 其中 所述对 PDLC层进行初始化以使所述正性液晶垂直于基板排列包括：
在形成 PDLC层时， 在第二透明电极单元上施加所述第一电压， 利用所 述开关元件控制所述第一透明电极单元具有与所述第二透明电极单元相反的 极性， 从而在所述第一透明电极单元和所述第二透明电极单元之间形成垂直 于基板的电场， 使得所述 PDLC层的液晶分子垂直于基板排列， 同时进行 PDLC层的固化； 并且
在形成第一透明电极单元和第二透明电极单元之后， 在所述第一基板设 置有第一透明电极的一面及所述第二基板设置有第二透明电极的一面， 均涂 覆垂直取向的取向材料， 并使取向材料固化形成垂直取向的取向层。
PCT/CN2013/088552 2013-05-30 2013-12-04 液晶显示面板及其驱动方法和制作方法、显示装置 Ceased WO2014190705A1 (zh)

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