WO2021174638A1 - 液晶显示面板及其制备方法和液晶显示器 - Google Patents

液晶显示面板及其制备方法和液晶显示器 Download PDF

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Publication number
WO2021174638A1
WO2021174638A1 PCT/CN2020/083787 CN2020083787W WO2021174638A1 WO 2021174638 A1 WO2021174638 A1 WO 2021174638A1 CN 2020083787 W CN2020083787 W CN 2020083787W WO 2021174638 A1 WO2021174638 A1 WO 2021174638A1
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liquid crystal
layer
crystal display
display panel
compound
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PCT/CN2020/083787
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English (en)
French (fr)
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陈兴武
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Tcl华星光电技术有限公司
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Priority to US16/756,473 priority Critical patent/US11586076B2/en
Publication of WO2021174638A1 publication Critical patent/WO2021174638A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
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    • C09K19/2028—Compounds containing at least one asymmetric carbon atom containing additionally a linking group other than -COO- or -OCO-, e.g. -CH2-CH2-, -CH=CH-, -C=C-; containing at least one additional carbon atom in the chain containing -COO- or -OCO- groups, e.g. -COO-CH*-CH3
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    • C09K19/46—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing esters
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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
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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
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    • G02F1/1333—Constructional arrangements; Manufacturing methods
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    • G02—OPTICS
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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
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    • 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
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    • 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
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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
    • G02F1/137—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
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    • G02—OPTICS
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    • G02F1/1396—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 the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
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    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
    • 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
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle

Definitions

  • This application relates to the field of display technology, in particular to a liquid crystal display panel and a preparation method thereof, and a display using the liquid crystal display panel.
  • liquid crystal display technology is the most widely used in the display field, such as: LCD TVs, smart phones, computers, public display devices, vehicle display devices, etc.
  • the liquid crystal display technology has penetrated deeply into modern life.
  • the liquid crystal display has the advantages of lightness, thinness, power saving, and ideal display effect. With the rapid development of liquid crystal display technology, liquid crystal displays have gradually moved from indoor display to outdoor display.
  • liquid crystal display For outdoor liquid crystal displays, it is necessary to meet the requirements of a wide operating temperature range. Because liquid crystal materials have the disadvantage of a narrow applicable temperature range, ordinary liquid crystal displays cannot meet the needs of working outdoors, especially at low temperatures (below 0°C) Under certain conditions, the LCD cannot work normally. In order to ensure that the liquid crystal display can work normally outdoors, the prior art is to add a heating element to the liquid crystal display. In a low temperature (below 0°C) environment, through the heating effect of the heating element, the liquid crystal display can work normally at a suitable temperature. This method has the disadvantages of increased start-up time, increased cost, and inconvenient maintenance.
  • This application provides a liquid crystal display panel and a preparation method thereof and a liquid crystal display.
  • the liquid crystal display panel adopts a multi-electrode and dual-frequency liquid crystal design.
  • the working temperature of the panel does not require additional heating elements.
  • the liquid crystal display using the liquid crystal display panel has a wide range of operating temperature, and is especially suitable for outdoor use.
  • liquid crystal display panel including:
  • the second substrate has a third electrode layer, and a second alignment layer is provided on the third electrode layer;
  • the liquid crystal layer is sandwiched between the first alignment layer and the second alignment layer, and the material of the liquid crystal layer is a dual-frequency liquid crystal composition
  • the first polarizing layer is disposed on the side of the first substrate away from the liquid crystal layer;
  • the second polarizing layer is arranged on the side of the second substrate away from the liquid crystal layer.
  • the second electrode layer includes at least two electrode units, and each electrode unit of the at least two electrode units has a slit therebetween.
  • the alignment direction of the first alignment layer and the electrode unit are arranged obliquely, and after voltage is applied, the alignment direction of the liquid crystal molecules and the electric field lines are in a non-vertical or non-parallel state, thereby Promote the liquid crystal molecules can be deflected with the electric field.
  • the alignment direction of the first alignment layer and the electrode unit have an included angle of 90 degrees to 100 degrees.
  • the dual-frequency liquid crystal composition includes 60%-75% positive liquid crystal and 25%-40% negative liquid crystal calculated by mass percentage.
  • the positive liquid crystal includes a first compound, and the general formula of the first compound is as follows:
  • the value of m 1 is 0 or 1;
  • the R 1 and R 2 are groups whose general formula is C n H 2n+1, whose general formula is OC n H 2n+1, and whose general formula is C z H 2z-1-yl group, the formula is a group OC z H 2z-1 is, H, F, or CN, wherein, n-a is any integer between 0 ⁇ 9, z is between 1 to 9 Any integer;
  • a 1 , A 2 and A 3 are polycyclic compounds or heterocyclic compounds.
  • the first compound is selected from:
  • the first compound is:
  • the first compound is:
  • the positive liquid crystal further includes a second compound, and the general formula of the second compound is as follows:
  • the values of m 2 , m 3 , m 4 and m 5 are all 0 or 1;
  • the R 3 is a group whose general formula is C n H 2n+1, and whose general formula is OC n H 2n+1
  • the group and the general formula are the group of C z H 2z-1 , the general formula is the group of OC z H 2z-1 , where n is any integer between 0-9 and z is between 1-9
  • R4 is F, CN or SCN
  • a 4 , A 5 , A 6 and A 7 are polycyclic compounds or heterocyclic compounds
  • X 1 and X 2 are H, F, CN or SCN
  • the second compound is selected from:
  • the second compound is:
  • the second compound is:
  • the second compound is:
  • the negative liquid crystal includes a third compound, and the general formula of the third compound is as follows:
  • the values of m 6 , m 7 and m 8 are all 0 or 1;
  • the R 5 and R 6 are groups whose general formula is C n H 2n+1, and whose general formula is OC n H 2n+1
  • the group and the general formula are the group of C z H 2z-1 , the general formula is the group of OC z H 2z-1 , where n is any integer between 0-9 and z is between 1-9
  • a 8 , A 9 and A 10 are polycyclic compounds or heterocyclic compounds;
  • X 3 and X 4 are H, F, or the same group as R 5 ;
  • the third compound is selected from:
  • the third compound is:
  • the third compound is:
  • an embodiment of the present application provides a method for manufacturing a liquid crystal display panel, including the following steps:
  • a first polarizing layer and a second polarizing layer are respectively formed on the side of the first substrate and the second substrate away from the liquid crystal layer to obtain a liquid crystal display panel.
  • an embodiment of the present application provides a liquid crystal display, including any one of the above-mentioned liquid crystal display panels.
  • the liquid crystal display has a wide operating temperature range, can still work normally at low temperatures (below 0°C), and is suitable for outdoor use. .
  • the liquid crystal display panel has a three-electrode design. In a low temperature (below 0°C) environment, high-frequency driving is achieved through two electrodes. The liquid crystal layer appears as a negative liquid crystal, which is controlled by fringe field switching (FFS) technology. Display; Since the display frequency is increased, the heat dissipation of the display panel is increased, thereby increasing the operating temperature of the display panel, and there is no need to add additional heating elements, which greatly reduces the manufacturing cost.
  • FPS fringe field switching
  • liquid crystal layer behaves as a positive liquid crystal, which can be controlled by twisted nematic (TN) technology; the liquid crystal of this liquid crystal display panel
  • TN twisted nematic
  • the display can work normally in a low temperature (below 0°C) environment, meet the needs of outdoor display, and has the advantages of saving manufacturing costs and convenient maintenance.
  • FIG. 1 is a schematic cross-sectional view of a liquid crystal display panel when no electric field is applied in an embodiment of the application;
  • FIG. 2 is a top view of a liquid crystal display panel when no electric field is applied in an embodiment of the application;
  • FIG. 3 is a schematic cross-sectional view of a liquid crystal display panel during low-frequency driving in an embodiment of the application;
  • FIG. 4 is a top view of a liquid crystal display panel during high-frequency driving in an embodiment of the application
  • FIG. 5 is a schematic flow chart of a manufacturing method of a liquid crystal display panel in an embodiment of the application.
  • the application provides a liquid crystal display panel, a preparation method thereof, and a liquid crystal display.
  • a liquid crystal display panel a preparation method thereof, and a liquid crystal display.
  • an embodiment of the present application provides a liquid crystal display panel, including:
  • the first substrate 1 has a first electrode layer 11 and a second electrode layer 12, an insulating layer 13 is provided between the first electrode layer 11 and the second electrode layer 12, and the second electrode layer 12 is provided There is a first alignment layer.
  • the second substrate 2 has a third electrode layer 21, and a second alignment layer is provided on the third electrode layer 21.
  • the liquid crystal layer 3 is sandwiched between the first alignment layer and the second alignment layer, and the material of the liquid crystal layer 3 is a dual-frequency liquid crystal composition.
  • the first polarizing layer 4 is disposed on the side of the first substrate 1 away from the liquid crystal layer 3.
  • the second polarizing layer 5 is disposed on the side of the second substrate 2 away from the liquid crystal layer 3.
  • the first substrate 1 and the second substrate 2 are opposed to each other, the first substrate 1 is a thin film transistor (TFT) array substrate; the second substrate 2 is a color filter (Color Filter, CF) substrate.
  • the liquid crystal close to the first alignment layer is the lower liquid crystal 6, and the liquid crystal close to the second alignment layer is the upper liquid crystal 7.
  • the angle difference between the first alignment layer and the second alignment layer is 90 degrees, that is, when no voltage is applied, the long axis of the upper liquid crystal 7 is perpendicular to the long axis of the lower liquid crystal 6, and the arrangement direction of the lower liquid crystal 6
  • the arrangement direction of the liquid crystal 7 on the upper side is deflected by 90 degrees.
  • the first polarizer 4 is the first polarizer, and the first polarizer 4 is attached to the side of the first substrate 1 away from the liquid crystal layer 3.
  • the second polarizer 5 is the second polarizer.
  • the sheet is attached to the side of the second substrate 2 away from the liquid crystal layer 3.
  • the transmission axis of the first polarizer is perpendicular to the transmission axis of the second polarizer, corresponding to a normal white (NW) display mode; or parallel to each other, corresponding to a normal black (NB) display mode.
  • the second electrode layer 12 is made of indium tin oxide (ITO), and includes at least two electrode units 121. There are slits, and the electrode units 121 are parallel to each other.
  • ITO indium tin oxide
  • the second electrode layer includes eight strip-shaped electrode units 121, the eight strip-shaped electrode units 121 are arranged in parallel, and each electrode unit 121 has a slit.
  • the alignment direction of the first alignment layer and the electrode unit are arranged obliquely, and after voltage is applied, the alignment direction of the liquid crystal molecules and the electric field lines are in a non-vertical or non-parallel state, thereby Promote the liquid crystal molecules can be deflected with the electric field.
  • the arrangement direction of the lower liquid crystals 6 is deflected by 90 degrees from the arrangement direction of the upper liquid crystals 7, and the alignment direction of the first alignment layer and the electrode unit 121 are arranged obliquely, namely: When no voltage is applied, the long axis of the lower layer liquid crystal 6 and the electrode unit 121 have an included angle of 90 degrees to 100 degrees.
  • the liquid crystal layer 3 is a dual-frequency liquid crystal composition, which is a mixture of positive liquid crystals and negative liquid crystals. Under voltage driving of different frequencies, the dual-frequency liquid crystal composition can behave as positive liquid crystals or negative liquid crystals.
  • the dielectric constant of the dual-frequency liquid crystal composition changes with the frequency of the applied electric field, and the dielectric constant of the dual-frequency liquid crystal composition gradually decreases from a positive value to a negative value, which is caused by the polarization of the molecules in the electric field. It is caused by the delayed response during rapid changes. This phenomenon mainly occurs in the positive liquid crystal molecules in the variable-frequency electric field.
  • the embodiments of the present application select positive liquid crystals with a specific structure and adjust the mass ratio of positive liquid crystals and negative liquid crystals, so that the dielectric constant of the dual-frequency liquid crystal composition changes significantly with the frequency of the applied electric field. The change can be applied to the liquid crystal display panel of the embodiment of the present application.
  • the dual-frequency liquid crystal composition is calculated by mass percentage, and includes:
  • the positive liquid crystal includes a first compound, and the general formula of the first compound is as follows:
  • the R 1 and R 2 are groups whose general formula is C n H 2n+1, whose general formula is OC n H 2n+1, whose general formula is C z H 2z-1, and whose general formula is The group of OC z H 2z-1 , H, F, or CN, wherein n is any integer between 0-9, and z is any integer between 1-9.
  • a 1 , A 2 and A 3 are polycyclic compounds or heterocyclic compounds, such as benzene ring, cyclohexane, five-membered ring, etc.
  • the first compound is selected from:
  • the first compound is:
  • the first compound is:
  • the first compound is:
  • the positive liquid crystal further includes a second compound, and the general formula of the second compound is as follows:
  • the values of m 2 , m 3 , m 4 and m 5 are all 0 or 1.
  • the R 3 is a group with the general formula C n H 2n+1
  • the general formula is a group with OC n H 2n+1
  • the general formula is a group with C z H 2z-1
  • the general formula is OC z H
  • the group of 2z-1 wherein n is any integer between 0-9, z is any integer between 1-9
  • the R 4 is F, CN or SCN.
  • a 4 , A 5 , A 6 and A 7 are polycyclic compounds or heterocyclic compounds, such as benzene ring, cyclohexane, five-membered ring, etc.
  • X 1 and X 2 are H, F, CN or SCN.
  • Adding the second compound to the positive liquid crystal on the one hand increases the length of the rigid conjugation mechanism of the positive liquid crystal molecules, and on the other hand introduces strong electronegative F, CN or SCN as end groups to further extend the conjugation structure.
  • the second compound is selected from:
  • the second compound is:
  • the second compound is:
  • the second compound is:
  • the negative liquid crystal includes a third compound, and the general formula of the third compound is as follows:
  • the values of m 6 , m 7 and m 8 are all 0 or 1.
  • the R 5 and R 6 are groups whose general formula is CnH2n+1, whose general formula is OC n H 2n+1, whose general formula is C z H 2z-1, and whose general formula is OC z H 2z-1 group, wherein n is any integer between 0-9, z is any integer between 1-9;
  • a 8 , A 9 and A 10 are polycyclic compounds or heterocyclics Compound;
  • X 3 and X 4 are H, F, or the same group as R 5 ;
  • the third compound is selected from:
  • the third compound is:
  • the third compound is:
  • the dual-frequency liquid crystal composition is calculated by mass percentage, and includes: 30%-50% of the first compound, 20%-30% of the second compound, and 25%-40% of the third compound .
  • the dual-frequency liquid crystal composition is composed of 50% of the first compound, 20% of the second compound, and 30% of the third compound.
  • the first compound is as follows:
  • the second compound is as follows:
  • the third compound is as follows:
  • a high-frequency electric field is applied between the first electrode 11 and the second electrode 12, and the liquid crystal layer 3 appears as a negative liquid crystal.
  • FFS technology can be used to control the display, and due to the increase of the display frequency , The heat dissipation of the display panel is increased, thereby increasing the operating temperature of the display panel, without additional heating elements.
  • the liquid crystal layer 3 behaves as a positive liquid crystal, and the display is controlled by TN technology.
  • the transmission axis of the first polarizing layer 4 and the transmission axis of the second polarizing layer 5 are perpendicular.
  • the arrangement direction of the lower liquid crystal 6 is compared with the arrangement direction of the upper liquid crystal 7. It was deflected by 90 degrees. Therefore, when no voltage is applied to the liquid crystal layer 3, when the incident light passes through the first polarizing layer 4, a unidirectionally polarized light wave remains.
  • the arrangement direction of the upper liquid crystal 7 is compared with that of the lower side.
  • the arrangement direction of the liquid crystal 6 is deflected by 90 degrees, so when the light wave reaches the second polarizing layer 5, the polarization direction of the light is also rotated by 90 degrees, and the angle difference between the first polarizing layer 4 and the second polarizing layer 5 It is also 90 degrees, so light can pass through the second polarizing layer 5, and the liquid crystal display panel is in a bright state.
  • the liquid crystal layer 3 When the operating temperature of the liquid crystal display panel is below 0° C., a high-frequency electric field is applied between the first electrode 11 and the second electrode 12, and the liquid crystal layer 3 appears as a negative liquid crystal.
  • the liquid crystal molecules of the liquid crystal layer 3 are arranged parallel to the second electrode 12, that is, the long axis of the liquid crystal molecules is parallel to the second electrode 12. Since there is no effective optical path difference, light cannot pass through the second polarizing layer 5, and the liquid crystal display panel is in a dark state.
  • high frequency driving due to the increase of the display frequency, the heat dissipation of the display panel is increased, thereby increasing the operating temperature of the display panel without additional heating elements.
  • the same voltage is applied to the first electrode 11 and the second electrode 12, and a voltage different from the first electrode 11 and the second electrode 12 is applied to the third electrode 21 to A pressure difference is formed and low-frequency driving is adopted, and the frequency is 30-300 Hz, preferably 60 Hz, and the liquid crystal layer 3 appears as a positive liquid crystal.
  • the liquid crystal molecules of the liquid crystal layer 3 stand upright between the second electrode 12 and the third electrode 21, that is, the long axis of the liquid crystal molecules is parallel to the electric field lines.
  • the unidirectionally polarized light waves passing through the second polarizing layer 5 will not change the polarization direction when passing through the liquid crystal molecules, so that the light cannot pass through the first polarizing layer 4 and the liquid crystal display panel is in a dark state.
  • an embodiment of the present application provides a method for preparing a liquid crystal display panel, which is used to prepare the liquid crystal display panel disclosed in the first aspect.
  • the method includes the following steps:
  • a first substrate is provided, a first electrode layer, an insulating layer, and a second electrode layer are sequentially formed on one surface of the first substrate, and then a first alignment layer is formed on the second electrode layer;
  • step S3 adopts a conventional method in the art, which will not be described in detail here.
  • the method for forming the first polarizing layer and the second polarizing layer in step S5 adopts conventional methods in the art, which will not be described in detail here.
  • the method of aligning the liquid crystal layer may be a rubbing alignment method, a photo alignment method, or the like.
  • the friction alignment method is used to align the first alignment layer and the second alignment layer, and the first alignment film and the second alignment film are brushed to grind the grooves arranged in a certain direction on the first alignment film and the second alignment film, and then use The surfaces of the first alignment layer and the second alignment layer are cleaned with deionized water, and the liquid crystal molecules of the liquid crystal layer are aligned along the grooves on the first alignment film and the second alignment film.
  • the photo-alignment method is used to align the first alignment layer and the second alignment layer, and the reactive monomers in the liquid crystal layer are polymerized by the irradiation of ultraviolet light, thereby curing the first alignment layer and the second alignment layer.
  • the surface of the second alignment layer In the process of ultraviolet light irradiation, the reactive monomer is always in a charged state, and the reactive monomer moves to the first alignment layer and the second alignment layer according to the pretilt direction under the action of the electric field and the anchoring force of the first alignment layer and the second alignment layer.
  • the surface of the alignment layer is then cured on the surfaces of the first alignment layer and the second alignment layer to complete the alignment.
  • an embodiment of the present application provides a liquid crystal display, including a backlight module and a liquid crystal display panel.
  • the backlight module is used to provide a light source to the liquid crystal display panel.
  • the liquid crystal display panel is an embodiment of the application. The liquid crystal display panel disclosed in the first aspect will not be repeated here.
  • the backlight module can use the products disclosed in the prior art.
  • the backlight module includes laminated light source, light guide plate, reflector plate, diffuser plate and prism sheet.
  • the light emitted by the light source is distributed to the light source through the light guide plate everywhere, the direction of all the light is concentrated toward the liquid crystal molecules through the reflector, and finally the light is evenly emitted through the prism sheet and the diffuser to prevent the LCD panel from appearing with high brightness at the center and low brightness around it. Phenomenon.

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Abstract

一种液晶显示面板及其制备方法和液晶显示器，该液晶显示面板采用多电极搭配双频液晶的结构，在低温(0℃以下)下，液晶显示面板采用高频驱动，使液晶显示面板发热增加，从而提高面板的工作温度，无需额外增加加热元件。应用液晶显示面板的液晶显示器具有宽范围的工作温度，尤其适用于户外使用。

Description

液晶显示面板及其制备方法和液晶显示器 技术领域
本申请涉及显示技术领域，具体涉及一种液晶显示面板及其制备方法，以及应用该液晶显示面板的显示器。
背景技术
目前，液晶显示技术在显示领域应用最为广泛，如：液晶电视、智能手机、电脑、公共显示装置、车载显示装置等，液晶显示技术已深入渗透至现代生活中。液晶显示器具有轻薄、省电、显示效果理想等优点。随着液晶显示技术的快速发展，液晶显示器也逐步从室内显示迈向户外显示。
对于应用于户外的液晶显示器，需满足工作温度范围宽泛的要求，由于液晶材料具有适用温度范围狭窄的缺点，所以普通的液晶显示器无法满足在户外工作的需求，尤其是在低温(0℃以下)的条件下，液晶无法正常工作。为了保证液晶显示器能够在户外正常工作，现有技术是在液晶显示器上增加加热元件，在低温(0℃以下)环境下，通过加热元件的加热作用，使液晶显示器适宜的温度下正常工作，但该方式具有增加开机时间、提高成本、维修不便的缺点。
技术问题
本申请提供一种液晶显示面板及其制备方法和液晶显示器，该液晶显示面板采用多电极搭配双频液晶设计，低温(0℃以下)时采用高频驱动，使液晶显示面板发热增加，从而提高面板的工作温度，无需额外增加加热元件。应用该液晶显示面板的液晶显示器具有宽范围的工作温度，尤其适用于户外使用。
技术解决方案
第一方面，本申请提供一种液晶显示面板，包括：
第一基板，具有第一电极层和第二电极层，所述的第一电极层和第二电极层之间设有绝缘层，所述的第二电极层上设有第一配向层；
第二基板，具有第三电极层，所述的第三电极层上设有第二配向层；
液晶层，夹设于所述的第一配向层和第二配向层之间，所述液晶层的材料为双频液晶组合物；
第一偏光层，设置于所述第一基板远离液晶层的一面上；
第二偏光层，设置于所述第二基板远离液晶层的一面上。
在一些实施例中，所述第二电极层包括至少两个电极单元，所述至少两个电极单元的各电极单元之间具有狭缝。
在一些实施例中，所述第一配向层的配向方向与所述的电极单元之间呈倾斜设置，施加电压后，使液晶分子的排列方向与电场线处于非垂直亦非平行的状态，从而促使液晶分子可随电场偏转。
在一些实施例中，所述第一配向层的配向方向与所述的电极单元之间具有90度～100度的夹角。
在一些实施例中，所述的双频液晶组合物按照质量百分比计算，包括：60％～75％的正性液晶和25％～40％的负性液晶。
在一些实施例中，所述的正性液晶包括第一化合物，所述第一化合物的通式如下：
Figure PCTCN2020083787-appb-000001
其中，m 1的取值为0或1；所述R 1和R 2为通式是C nH 2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团、H、F或CN，其中，n为0～9之间的任一整数，z为1～9之间的任一整数；A 1、A 2和A 3为多元环状化合物或杂环类化合物。
在一些实施例中，所述第一化合物选自：
Figure PCTCN2020083787-appb-000002
Figure PCTCN2020083787-appb-000003
中的一个或多个。
在一些实施例中，所述第一化合物为：
Figure PCTCN2020083787-appb-000004
在一些实施例中，所述第一化合物为：
Figure PCTCN2020083787-appb-000005
在一些实施例中，所述的正性液晶还包括第二化合物，所述第二化合物的通式如下：
Figure PCTCN2020083787-appb-000006
其中，m 2、m 3、m 4和m 5的取值均为0或1；所述R 3为通式是C nH 2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团，其中，n为0～9之间的任一整数，z为1～9之间的任一整数；所述R4为F、CN或SCN；A 4、A 5、A 6和A 7为多元环状化合物或杂环类化合物；X 1和X 2为H、F、CN或SCN；C 1、C 2和C 3为通式是C xH 2x的基团、COO基团、CH＝CH基团、CH 2-O基团或CF 2-O基团，其中，x为1～9之间的任一整数，并且若C 1、C 2和C 3中至少有两个存在，则至少有一个为COO基团，若C 1、C 2和C 3中仅有一个存在，则仅有的一个为COO基团。
在一些实施例中，所述第二化合物选自：
Figure PCTCN2020083787-appb-000007
Figure PCTCN2020083787-appb-000008
中的一种或多种。
在一些实施例中，所述第二化合物为：
Figure PCTCN2020083787-appb-000009
在一些实施例中，所述第二化合物为：
Figure PCTCN2020083787-appb-000010
在一些实施例中，所述第二化合物为：
Figure PCTCN2020083787-appb-000011
在一些实施例中，所述的负性液晶包括第三化合物，所述第三化合物的通式如下：
Figure PCTCN2020083787-appb-000012
其中，m 6、m 7和m 8的取值均为0或1；所述R 5和R 6为通式是C nH 2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团，其中，n为0～9之间的任一整数，z为1～9之间的任一整数；A 8、A 9和A 10为多元环状化合物或杂环类化合物；X 3和X 4为H、F，或者为与R 5相同的基团；C 4和C 5为通式是C xH 2x的基团、COO基团、CH＝CH基团、CH 2-O基团或CF 2-O基团，其中，x为1～9之间的任一整数。
在一些实施例中，所述第三化合物选自：
Figure PCTCN2020083787-appb-000013
Figure PCTCN2020083787-appb-000014
在一些实施例中，所述第三化合物为：
Figure PCTCN2020083787-appb-000015
在一些实施例中，所述第三化合物为：
Figure PCTCN2020083787-appb-000016
第二方面，本申请实施例提供了一种液晶显示面板的制备方法，包括如下步骤:
提供第一基板，在所述第一基板的一面上依次形成第一电极层、绝缘层和第二电极层，然后在第二电极层上形成第一配向层；
提供第二基板，在所述第二基板的一面上形成第三电极层，然后在第三电极层上形成第二配向层；
将双频液晶组合物填充于第一基板和第二基板之间，形成液晶层，液晶层夹设于所述的第一配向层和第二配向层之间；
对液晶层进行配向；
分别在第一基板和第二基板远离液晶层的一面上形成第一偏光层和第二偏光层，获得液晶显示面板。
第三方面，本申请实施例提供了一种液晶显示器，包括上述任意一种液晶显示面板，该液晶显示器具有宽泛的工作温度范围，在低温(0℃以下)仍能正常工作，适用于户外使用。
有益效果
本申请采用三电极驱动搭配双频液晶的技术方案，来扩宽液晶显示面板的 工作温度范围。该液晶显示面板具有三电极设计，在低温(0℃以下)的环境中，通过两电极实现高频驱动，液晶层表现为负性液晶，采用边缘场开关型(Fringe Field Switching，FFS)技术控制显示；由于提高了显示频率，所以增加了显示面板的散热量，从而提高了显示面板的工作温度，且无需额外增加加热元件，极大地降低了制造成本。在温度高于0℃的环境中，通过三个电极实现低频驱动，液晶层表现为正性液晶，可采用扭曲向列型(Twisted Nematic，TN)技术控制显示；应用该该液晶显示面板的液晶显示器能够在低温(0℃以下)环境中正常工作，满足户外显示的需求，具有节约制造成本、维修方便的优点。
附图说明
图1为本申请实施例中未施加电场时液晶显示面板的截面示意图；
图2为本申请实施例中未施加电场时液晶显示面板的俯视图；
图3为本申请实施例中低频驱动时液晶显示面板的截面示意图；
图4为本申请实施例中高频驱动时液晶显示面板的俯视图；
图5为本申请实施例中液晶显示面板的制备方法流程示意图。
本发明的实施方式
本申请提供一种液晶显示面板及其制备方法和液晶显示器，为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
请参阅图1至图4，第一方面，本申请实施例提供了一种液晶显示面板，包括：
第一基板1，具有第一电极层11和第二电极层12，所述的第一电极层11和第二电极层12之间设有绝缘层13，所述的第二电极层12上设有第一配向层。
第二基板2，具有第三电极层21，所述的第三电极层21上设有第二配向层。
液晶层3，夹设于所述的第一配向层和第二配向层之间，所述液晶层3的材料为双频液晶组合物。
第一偏光层4，设置于所述第一基板1远离液晶层3的一面上。
第二偏光层5，设置于所述第二基板2远离液晶层3的一面上。
其中，所述的第一基板1和第二基板2为相对设置，所述第一基板1为薄膜晶体管(Thin Film Transistor，TFT)阵列基板；所述第二基板2为彩色滤光片(Color Filter，CF)基板。靠近第一配向层的液晶为下侧液晶6，靠近第二配向层的液晶为上侧液晶7。第一配向层和第二配向层之间的角度差为90度，即：未施加电压时，上侧液晶7的长轴与下侧液晶6的长轴相垂直，下侧液晶6的排列方向相较于上侧液晶7的排列方向偏转了90度。
第一偏光层4即为第一偏光片，第一偏光片4贴合于第一基板1远离液晶层3的一面上，同理，第二偏光层5即为第二偏光片，第二偏光片贴合于第二基板2远离液晶层3的一面上。第一偏光片的透过轴与第二偏光片的透过轴相垂直，以对应常白(Normal White，NW)显示模式；或者互相平行，对应常黑(Normal Black，NB)显示模式。
在一些实施例中，所述第二电极层12由氧化铟锡(Indium Tin Oxides，ITO)制成，包括至少两个电极单元121，所述至少两个电极单元121的各电极单元121之间具有狭缝，且各电极单元121之间相互平行。例如，参阅图2，所述第二电极层包括八个条状电极单元121，八个条状电极单元121之间为平行设置，各个电极单元121之间具有狭缝。
在一些实施例中，所述第一配向层的配向方向与所述的电极单元之间呈倾斜设置，施加电压后，使液晶分子的排列方向与电场线处于非垂直亦非平行的状态，从而促使液晶分子可随电场偏转。例如，参阅图2，下侧液晶6的排列方向较上侧液晶7的排列方向偏转了90度，所述第一配向层的配向方向与所述的电极单元121之间呈倾斜设置，即：未施加电压时，下层液晶6的长轴与所述电极单元121之间具有90度～100度的夹角。
液晶层3为双频液晶组合物，为正性液晶和负性液晶的混合物，在不同频率的电压驱动下，双频液晶组合物既可以表现为正性液晶，也可以表现为负性液晶。该双频液晶组合物的介电常数会随着施加电场的频率变化而发生改变， 双频液晶组合物的介电常数会从正值逐步减小到负值，是由分子的极化在电场快速变化时的延迟响应所引起，这个现象主要发生于处于变频电场的正性液晶分子中。一般认为，双频液晶组合物中具有较大极性、较长共轭结构的正性液晶有利于该现象的发生。基于此，本申请实施例通过选用具有特定结构的正性液晶，并调配正性液晶和负性液晶的质量比，使得双频液晶组合物的介电常数随着施加电场的频率变化而发生明显改变，能够应用于本申请实施例的液晶显示面板中。
在一些实施例中，所述的双频液晶组合物按照质量百分比计算，包括：
60％～75％的正性液晶和25％～40％的负性液晶。
在一些实施例中，所述的正性液晶包括第一化合物，所述第一化合物的通式如下：
Figure PCTCN2020083787-appb-000017
其中，m 1的取值为0或1。所述R 1和R 2为通式是C nH 2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团、H、F或CN，其中，n为0～9之间的任一整数，z为1～9之间的任一整数。A 1、A 2和A 3为多元环状化合物或杂环类化合物，如：苯环、环己烷、五元环等。
在一些实施例中，第一化合物选自：
Figure PCTCN2020083787-appb-000018
Figure PCTCN2020083787-appb-000019
中的一个或多个。
例如：所述第一化合物为：
Figure PCTCN2020083787-appb-000020
例如：所述第一化合物为：
Figure PCTCN2020083787-appb-000021
例如：所述第一化合物为：
Figure PCTCN2020083787-appb-000022
在一些实施例中，所述的正性液晶还包括第二化合物，所述第二化合物的通式如下：
Figure PCTCN2020083787-appb-000023
其中，m 2、m 3、m 4和m 5的取值均为0或1。所述R 3为通式是C nH 2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团，其中，n为0～9之间的任一整数，z为1～9之间的任一整数；所述R 4为F、CN或SCN。A 4、A 5、A 6和A 7为多元环状化合物或杂环类化合物，如：苯环、环己烷、五元环等。X 1和X 2为H、F、CN或SCN。C 1、C 2和C 3为通式是C xH 2x的基团、COO基团、CH＝CH基团、CH 2-O基团或CF 2-O基团，其中，x为1～9之间的任一整数，并且若C 1、C 2和C 3中至少有两个存在，则至少有一个为COO基团，若C 1、C 2和C 3中仅有一个存在，则仅有的一个为COO基团。
在正性液晶中加入第二化合物，一方面提升了正性液晶分子的刚性共轭机构长度，另一方面引入强电负性的F、CN或SCN作为端基，进一步延长共轭结构。
在一些实施例中，所述第二化合物选自：
Figure PCTCN2020083787-appb-000024
Figure PCTCN2020083787-appb-000025
Figure PCTCN2020083787-appb-000026
中的一种或多种。
例如：所述第二化合物为：
Figure PCTCN2020083787-appb-000027
例如：所述第二化合物为：
Figure PCTCN2020083787-appb-000028
例如：所述第二化合物为：
Figure PCTCN2020083787-appb-000029
所述的负性液晶包括第三化合物，所述第三化合物的通式如下：
Figure PCTCN2020083787-appb-000030
其中，m 6、m 7和m 8的取值均为0或1。所述R 5和R 6为通式是CnH2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团，其中，n为0～9之间的任一整数，z为1～9之间的任一整数；A 8、A 9和A 10为多元环状化合物或杂环类化合物；X 3和X 4为H、F，或者为与R 5相同的基团；C 4和C 5为通式是C xH 2x的基团、COO基团、CH＝CH基团、CH 2-O基团或CF 2-O基团，其中，x为1～9之间的任一整数。
在一些实施例中，第三化合物选自：
Figure PCTCN2020083787-appb-000031
例如：所述第三化合物为：
Figure PCTCN2020083787-appb-000032
例如：所述第三化合物为：
Figure PCTCN2020083787-appb-000033
在一些实施例中，所述的双频液晶组合物按照质量百分比计算，包括：30％～50％的第一化合物，20％～30％的第二化合物以及25％～40％的第三化合物。
例如，按照质量百分比计算，所述的双频液晶组合物由50％的第一化合物，20％的第二化合物，以及30％的第三化合物组成。
其中，第一化合物如下：
Figure PCTCN2020083787-appb-000034
第二化合物如下：
Figure PCTCN2020083787-appb-000035
第三化合物如下：
Figure PCTCN2020083787-appb-000036
本申请实施例的液晶显示面板工作原理为：
当工作环境的温度在0℃以下时，对第一电极11和第二电极12之间施加高频电场，液晶层3表现为负性液晶，可采用FFS技术控制显示，并且由于显示频率的提高，显示面板的散热量增加，从而提高了显示面板的工作温度，无需额外增加加热元件。
当工作环境的温度高于0℃时，采用低频驱动，对第一电极11和第二电极12施加相同的电压，对第三电极21施加与第一电极11和第二电极12不同的电压，以形成压差，液晶层3表现为正性液晶，采用TN技术控制显示。
例如，液晶显示面板中第一偏光层4的透光轴和第二偏光层5的透光轴相垂直，未施加电压时，下侧液晶6的排列方向相较于上侧液晶7的排列方向偏转了90度。因此，未对液晶层3施加电压时，入射的光线经过第一偏光层4时，剩下单方向极化的光波，通过液晶层3时，由于上侧液晶7的排列方向相较于下侧液晶6的排列方向偏转了90度，所以当光波到达第二偏光层5时，光的极化方向恰好也旋转了90度，而第一偏光层4与第二偏光层5之间的角度差异同样是90度，所以光线可通过第二偏光层5，液晶显示面板为亮态。
当该液晶显示面板的工作温度在0℃以下时，对第一电极11和第二电极12之间施加高频电场，液晶层3表现为负性液晶。参阅图4，施加电压后，采用FFS技术控制显示，液晶层3的液晶分子平行于第二电极12排列，即：液晶分子的长轴与第二电极12相平行。由于无有效光程差产生，所以光线不能通过第二偏光层5，液晶显示面板处于暗态。采用高频驱动，由于显示频率的提高，显示面板的散热量增加，从而提高了显示面板的工作温度，无需额外增加加热元件。
当该液晶显示面板的工作温度高于0℃时，对第一电极11和第二电极12施加相同的电压，对第三电极21施加与第一电极11和第二电极12不同的电压，以形成压差，并采用低频驱动，频率为30～300Hz，优选为60Hz，液晶层 3表现为正性液晶。参阅图3，施加电压后，液晶层3的液晶分子均竖直立于第二电极12和第三电极21之间，即：液晶分子的长轴与电场线相平行。因此，通过第二偏光层5的单方向极化光波，经过液晶分子时不会改变极化方向，从而光线无法通过第一偏光层4，液晶显示面板处于暗态。
第二方面，本申请实施例提供了一种液晶显示面板的制备方法，用于制备第一方面所公开的液晶显示面板，参阅图5，包括如下步骤：
S1、提供第一基板，在所述第一基板的一面上依次形成第一电极层、绝缘层和第二电极层，然后在第二电极层上形成第一配向层；
S2、提供第二基板，在所述第二基板的一面上形成第三电极层，然后在第三电极层上形成第二配向层；
S3、将双频液晶组合物填充于第一基板和第二基板之间，形成液晶层，液晶层3夹设于所述的第一配向层和第二配向层之间；
S4、对液晶层进行配向；
S5、分别在第一基板和第二基板远离液晶层的一面上贴合第一偏光层和第二偏光层，获得液晶显示面板。
需要说明的是，步骤S3的液晶层形成方法采用本领域常规方法，此处不再详述。步骤S5的第一偏光层和第二偏光层形成方法采用本领域常规方法，此处不再详述。
步骤S4中，对液晶层进行配向的方式可为摩擦配向法、光配向法等。
具体为，采用摩擦配向法对第一配向层和第二配向层进行配向，先使用布毛滚轮分别在第一配向膜和第二配向膜上刷磨出按照一定方向排列的沟槽，再使用去离子水分别清洗第一配向层和第二配向层的表面，液晶层的液晶分子沿着第一配向膜和第二配向膜上的沟槽进行配向。
具体为，采用光配向发法对第一配向层和第二配向层进行配向，通过紫外光的照射作用，使液晶层中的反应性单体发生聚合反应，从而固化于第一配向层和第二配向层的表面。在紫外光照射过程中，始终处于加电状态，反应性单体在电场，以及第一配向层和第二配向层的锚定力作用下，按照预倾角方向移动至第一配向层和第二配向层的表面，然后固化于第一配向层和第二配向层的表面，从而完成配向。
第三方面，本申请实施例提供了一种液晶显示器，包括背光模组和液晶显示面板，背光模组的作用是向液晶显示面板提供光源，其中，所述的液晶显示面板为本申请实施例第一方面所公开的液晶显示面板，在此不再赘述。
背光模组可采用现有技术所公开的产品，如：背光模组包括层叠设置的光源、导光板、反射板、扩散板和棱镜片等组件，光源射出的光线，通过导光板将光线分布到各处，然后通过反射板将所有光线的方向集中朝向液晶分子，最后光线通过棱镜片和扩散板将光线均匀的散发出去，避免液晶显示面板出现中央位置处亮度过高，而四周亮度过低的现象。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (20)

  1. 一种液晶显示面板，其中，包括：
    第一基板，具有第一电极层和第二电极层，所述的第一电极层和第二电极层之间设有绝缘层，所述的第二电极层上设有第一配向层；
    第二基板，具有第三电极层，所述的第三电极层上设有第二配向层；
    液晶层，夹设于所述的第一配向层和第二配向层之间，所述液晶层的材料为双频液晶组合物；
    第一偏光层，设置于所述第一基板远离液晶层的一面上；
    第二偏光层，设置于所述第二基板远离液晶层的一面上。
  2. 根据权利要求1所述的液晶显示面板，其中，所述第二电极层包括至少两个电极单元，所述至少两个电极单元的各电极单元之间具有狭缝。
  3. 根据权利要求2所述的液晶显示面板，其中，所述第一配向层的配向方向与所述的电极单元之间呈倾斜设置。
  4. 根据权利要求3所述的液晶显示面板，其中，所述第一配向层的配向方向与所述的电极单元之间具有90度～100度 的夹角。
  5. 根据权利要求1所述的液晶显示面板，其中，所述的双频液晶组合物按照质量百分比计算，包括：60％～75％的正性液晶和25％～40％的负性液晶。
  6. 根据权利要求5所述的液晶显示面板，其中，所述的正性液晶包括第一化合物，所述第一化合物的通式如下：
    Figure PCTCN2020083787-appb-100001
    其中，m 1的取值为0或1；所述R 1和R 2为通式是C nH 2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团、H、F或CN，其中，n为0～9之间的任一整数，z为1～9之间的任一整数；A 1、A 2和A 3为多元环状化合物或杂环类化合物。
  7. 根据权利要求6所述的液晶显示面板，其中，所述第一化合物选自：
    Figure PCTCN2020083787-appb-100002
    Figure PCTCN2020083787-appb-100003
    Figure PCTCN2020083787-appb-100004
    中的一个或多个。
  8. 根据权利要求7所述的液晶显示面板，其中，所述第一化合物为：
    Figure PCTCN2020083787-appb-100005
  9. 根据权利要求7所述的液晶显示面板，其中，所述第一化合物为：
    Figure PCTCN2020083787-appb-100006
  10. 根据权利要求6所述的液晶显示面板，其中，所述的正性液晶还包括第二化合物，所述第二化合物的通式如下：
    Figure PCTCN2020083787-appb-100007
    其中，m 2、m 3、m 4和m 5的取值均为0或1；所述R 3为通式是C nH 2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团，其中，n为0～9之间的任一整数，z为1～9之间的任一整数；所述R 4为F、CN或SCN；A 4、A 5、A 6和A 7为多元环状化合物或杂环类化合物；X 1和X 2为H、F、CN或SCN；C 1、C 2和C 3为通式是C xH 2x的基团、COO基团、CH＝CH基团、CH 2-O基团或CF 2-O基团，其中，x为1～9之间的任一整数，并且若C 1、C 2和C 3中至少有两个存在，则至少有一个为COO基团，若C 1、C 2和C 3中仅有一个存在，则仅有的一个为COO基团。
  11. 根据权利要求10所述的液晶显示面板，其中，所述第二化合物选自：
    Figure PCTCN2020083787-appb-100008
    Figure PCTCN2020083787-appb-100009
    Figure PCTCN2020083787-appb-100010
    中的一种或多种。
  12. 根据权利要求11所述的液晶显示面板，其中，所述第二化合物为：
    Figure PCTCN2020083787-appb-100011
  13. 根据权利要求11所述的液晶显示面板，其中，所述第二化合物为：
    Figure PCTCN2020083787-appb-100012
  14. 根据权利要求11所述的液晶显示面板，其中，所述第二化合物为：
    Figure PCTCN2020083787-appb-100013
  15. 根据权利要求5所述的液晶显示面板，其中，所述的负性液晶包括第三化合物，所述第三化合物的通式如下：
    Figure PCTCN2020083787-appb-100014
    其中，m 6、m 7和m 8的取值均为0或1；所述R 5和R 6为通式是C nH 2n+1的基团、通式是OC nH 2n+1的基团、通式是C zH 2z-1的基团、通式是OC zH 2z-1的基团，其中，n为0～9之间的任一整数，z为1～9之间的任一整数；A 8、A 9和A 10为多元环状化合物或杂环类化合物；X 3和X 4为H、F，或者为与R 5相同的基团；C 4和C 5为通式是C xH 2x的基团、COO基团、CH＝CH基团、CH 2-O基团或CF 2-O基团，其中，x为1～9之间的任一整数。
  16. 根据权利要求15所述的液晶显示面板，其中，所述第三化合物选自：
    Figure PCTCN2020083787-appb-100015
    和/或
    Figure PCTCN2020083787-appb-100016
  17. 根据权利要求16所述的液晶显示面板，其中，所述第三化合物为：
    Figure PCTCN2020083787-appb-100017
  18. 根据权利要求16所述的液晶显示面板，其中，所述第三化合物为：
    Figure PCTCN2020083787-appb-100018
  19. 一种液晶显示面板的制备方法，其中，包括如下步骤:
    提供第一基板，在所述第一基板的一面上依次形成第一电极层、绝缘层和第二电极层，然后在第二电极层上形成第一配向层；
    提供第二基板，在所述第二基板的一面上形成第三电极层，然后在第三电极层上形成第二配向层；
    将双频液晶组合物填充于第一基板和第二基板之间，形成液晶层，液晶层夹设于所述的第一配向层和第二配向层之间；
    对液晶层进行配向；
    分别在第一基板和第二基板远离液晶层的一面上形成第一偏光层和第二偏光层，获得液晶显示面板。
  20. 一种液晶显示器，其中，包括如权利要求1至18任一项中所述的液晶显示面板。
PCT/CN2020/083787 2020-03-04 2020-04-08 液晶显示面板及其制备方法和液晶显示器 WO2021174638A1 (zh)

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