WO2016173109A1 - 高穿透率psva型液晶显示面板及其制作方法 - Google Patents

高穿透率psva型液晶显示面板及其制作方法 Download PDF

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Publication number
WO2016173109A1
WO2016173109A1 PCT/CN2015/082164 CN2015082164W WO2016173109A1 WO 2016173109 A1 WO2016173109 A1 WO 2016173109A1 CN 2015082164 W CN2015082164 W CN 2015082164W WO 2016173109 A1 WO2016173109 A1 WO 2016173109A1
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Prior art keywords
common electrode
liquid crystal
electrode
display panel
crystal display
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PCT/CN2015/082164
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English (en)
French (fr)
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钟新辉
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/764,168 priority Critical patent/US9785012B2/en
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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
    • 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
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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
    • G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
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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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Definitions

  • the present invention relates to the field of display technologies, and in particular, to a high transmittance PSVA type liquid crystal display panel and a method of fabricating the same.
  • TFT-LCD Active Thin Film Transistor-LCD
  • TN Twisted Nematic
  • STN Super Twisted Nematic
  • IPS In -Plane Switching
  • VA Vertical Alignment
  • the VA type liquid crystal display has a very high contrast ratio compared with other kinds of liquid crystal displays, generally reaching 4000-8000, and has a very wide application in large-size display, such as television.
  • the reason why the VA type liquid crystal display panel has a very high contrast is because the liquid crystal molecules are arranged perpendicular to the surface of the substrate in the uncharged dark state, and no phase difference is generated, the light leakage is extremely low, and the dark state brightness is small, which is calculated according to the contrast ratio.
  • a conventional VA type liquid crystal display panel includes an upper substrate 10 , a lower substrate 20 disposed opposite the upper substrate 10 , and a liquid crystal layer 40 sandwiched between the lower substrate 10 and the upper substrate 20 , and is formed on the upper substrate. 10 faces the surface of the lower substrate 20 and the PI alignment layer 30 of the lower substrate 20 facing the surface of the upper substrate 10. Since the VA type liquid crystal display panel adopts a vertically rotating liquid crystal, the difference in birefringence of the liquid crystal molecules is relatively large, resulting in a serious color shift problem at a large viewing angle.
  • multi-domain VA (MVA) is usually adopted, that is, one sub-pixel is divided into a plurality of regions, and each is made The liquid crystals in the region are undulating in different directions after the voltage is applied, so that the effects seen in the respective directions tend to be average and uniform.
  • MVA multi-domain VA
  • one method is to process one side of the ITO pixel electrode 70 into a "m-shaped" pattern, and the common electrode 80 has a uniform thickness and continuous uninterrupted. Planar electrode due to special The ITO pixel electrode pattern, which produces an oblique electric field, can induce liquid crystal molecules 40 in different regions to reversing in different directions.
  • FIG. 2 is a top plan view of a side of the lower substrate 20 of an MVA type liquid crystal display panel, wherein 210 and 220 are scan lines and data lines, respectively, and one sub-pixel is divided into four areas, in each area.
  • Each of the ITO pixel electrodes 70 is formed with a pattern in which pixel electrode branches and slits are extended in different directions.
  • 3 is a cross-sectional view of the MVA type liquid crystal display panel corresponding to AA of FIG. 2, wherein the pixel electrode 70 having a slit is disposed on the flat lower passivation layer 60, and the PI alignment over the pixel electrode 70 is shown.
  • the surface of the layer 30 is uneven, and the planar common electrode 80 is provided on the flat upper passivation layer 90, and the surface of the PI alignment layer 30 overlying the common electrode 80 is in a plane.
  • FIG. 4 to FIG. 6 there is an MVA type liquid crystal display panel which does not require the use of a PI alignment layer, which is called a polymer-stabilized vertical alignment (PSVA) type liquid crystal display panel, as shown in FIG. 4 to FIG. 6 .
  • PSVA polymer-stabilized vertical alignment
  • the pixel electrode 400 processed into a "m-shaped" pattern is disposed on the lower substrate 200
  • the planar common electrode 300 is disposed on the upper substrate 100
  • the polymer protrusions attached to the surface of the pixel electrode 400 and the common electrode 300 are shown.
  • 500 provides a pretilt angle in a certain direction for the liquid crystal molecules 700 in the liquid crystal layer. 7 to FIG.
  • FIGS. 9 are schematic diagrams showing a key process of the conventional PSVA type liquid crystal display panel: first, a planar common electrode 300 is formed on the upper substrate 100, and pixels processed into a "m-shaped" pattern are formed on the lower substrate 200. The electrode 400, the upper and lower substrate pairs are grouped and filled with a mixture of the liquid crystal molecules 700 and the polymerizable monomer 500'; then a voltage is applied to the common electrode 300 and the pixel electrode 400, so that the liquid crystal molecules 700 are processed according to the designed direction.
  • the direction of the slit of the pixel electrode 400 of the "m-shaped" pattern is inverted; and ultraviolet light (Ultraviolet Rays, UV light) is irradiated to react the polymerizable monomer 500' to form a surface of the pixel electrode 400 and the surface of the common electrode 300.
  • the polymer protrusions 500 provide a pretilt angle for the liquid crystal molecules 700 in a certain direction.
  • the pixel electrode 400 processed into a "m-shaped" pattern plays an important role. If the pixel electrode does not have a "m-shaped” pattern, the lodging direction of the liquid crystal molecules will become randomly uncontrollable after the application of the voltage. .
  • the electric field formed therebetween is uneven with the opposite side common electrode 300, corresponding to the pixel electrode branch region.
  • the electric field is significantly stronger than the electric field corresponding to the slit region, resulting in uneven brightness in the pixel.
  • T is the penetration rate
  • ⁇ is the angle between the long axis of the liquid crystal and the polarizer, and the efficiency is the highest at 45°; It is a phase difference, that is, a modulation effect of polarized light by liquid crystal molecules deflected by an electric field.
  • a is the angle between the long axis of the liquid crystal molecule and the normal to the substrate, and the size is determined by the magnitude of the electric field received by the liquid crystal molecules
  • d is the cell thickness of the liquid crystal cell
  • ⁇ n is the refractive index difference between the long and short axes of the liquid crystal.
  • the transmittance is the largest when ⁇ is ⁇ .
  • Formula (1) combined with formula (2) shows that, in the case where the thickness d of the liquid crystal layer is constant, the magnitude of the transmittance T is determined by the magnitude of the electric field applied to the liquid crystal: when ⁇ is smaller than ⁇ , the electric field is larger and penetrates. The rate T is larger; when ⁇ is larger than ⁇ , the electric field is larger, and the transmittance T is smaller.
  • the transmittance of the two partial regions cannot be simultaneously maximized, that is, when the ⁇ of the corresponding region of the pixel electrode branch is ⁇ , the corresponding region of the slit The ⁇ is smaller than ⁇ ; and when the ⁇ of the corresponding region of the slit reaches ⁇ , the ⁇ of the corresponding region of the pixel electrode branch has exceeded ⁇ . Therefore, the maximum transmittance cannot be achieved at the same time in the entire pixel region, and the maximum transmittance of the liquid crystal display panel cannot be achieved, and the brightness of the liquid crystal display panel is not uniform.
  • the object of the present invention is to provide a high transmittance PSVA type liquid crystal display panel, which can achieve the maximum transmittance at the same time in the entire pixel area, and solve the problem of lowering the transmittance of the pixel electrode pattern in the prior art and improve the problem.
  • the transmittance and brightness uniformity of the PSVA type liquid crystal display panel reduce the need for backlight brightness of the PSVA type liquid crystal display panel, and reduce cost and power consumption.
  • Another object of the present invention is to provide a method for fabricating a high transmittance PSVA liquid crystal display panel.
  • the PSVA liquid crystal display panel produced by the method has high transmittance and uniform brightness, and can reduce the backlight of the PSVA liquid crystal display panel.
  • the need for brightness reduces cost and power consumption.
  • the present invention provides a PSVA type liquid crystal display panel, comprising: an upper substrate; a lower substrate disposed opposite to the upper substrate; and a stack of the upper substrate facing the lower substrate in a top-down manner from top to bottom a first common electrode on the side, an insulating layer, a second common electrode, a pixel electrode disposed on a side of the lower substrate facing the upper substrate, and a liquid crystal layer interposed between the second common electrode and the pixel electrode And a plurality of polymer protrusions disposed on the surface of the second common electrode and the pixel electrode;
  • One of the first common electrode and the second common electrode is a patterned common electrode, and corresponding to each sub-pixel, the patterned common electrode is divided into a plurality of regions, each region having a common electrode extending in different directions a pattern of branches and slits spaced apart; the other is a planar common electrode of uniform thickness and continuous uninterrupted;
  • the pixel electrode is a planar electrode having a uniform thickness and continuous uninterrupted;
  • the polymer protrusions align liquid crystal molecules in the liquid crystal layer such that the liquid crystal molecules have a certain pretilt angle
  • the first common electrode is a planar common electrode
  • the second common electrode is a patterned common electrode; in the process of the high transmittance PSVA type liquid crystal display panel, the pixel electrode and the second common Applying a voltage to the electrode; applying voltage to the pixel electrode and the first common electrode during use of the high transmittance PSVA type liquid crystal display panel.
  • the second common electrode is a planar common electrode, and the first common electrode is a patterned common electrode; in the process of the high transmittance PSVA type liquid crystal display panel, the pixel electrode and the first common Applying a voltage to the electrode; applying voltage to the pixel electrode and the second common electrode during use of the high transmittance PSVA type liquid crystal display panel.
  • the patterned common electrode has a "m-shaped" pattern.
  • the material of the first common electrode, the second common electrode, and the pixel electrode is ITO;
  • the material of the insulating layer is silicon nitride or silicon oxide.
  • the polymer protrusions are formed by polymerization of a polymerizable monomer by UV light.
  • the polymerizable monomer is one or a combination of an acrylate and a derivative thereof, a methacrylate and a derivative thereof, styrene and a derivative thereof, an epoxy resin, and a fatty amine-based epoxy curing agent.
  • the invention also provides a method for manufacturing a PSVA type liquid crystal display panel, comprising the following steps:
  • Step 1 providing an upper substrate and a lower substrate
  • first common electrode First forming a first common electrode, an insulating layer covering the first common electrode, and a second common electrode on the insulating layer on the upper substrate; wherein the first common electrode and the second common electrode are One is a patterned common electrode, and corresponding to each sub-pixel, the patterned common electrode is divided into a plurality of regions, each of which has a pattern of common electrode branches and slits extending in different directions; the other is uniform thickness, Continuous uninterrupted planar common electrode;
  • a pixel electrode on the lower substrate, wherein the pixel electrode is a planar electrode having a uniform thickness and continuous uninterrupted;
  • Step 2 applying a voltage to the pixel electrode and the patterned common electrode to cause liquid crystal molecules to fall in different directions along the slit, forming a multi-domain in each sub-pixel;
  • Step 3 Applying a voltage to the pixel electrode and the patterned common electrode while using UV The light is irradiated to polymerize the polymerizable monomer to form a polymer protrusion attached to the surface of the pixel electrode and the second common electrode to align liquid crystal molecules in the liquid crystal layer such that the liquid crystal molecules have a certain pretilt angle.
  • the patterned common electrode has a "m-shaped" pattern, and the material of the first common electrode, the second common electrode, and the pixel electrode is ITO, and the material of the insulating layer is silicon nitride or silicon oxide.
  • the polymerizable monomer is one or a combination of an acrylate and a derivative thereof, a methacrylate and a derivative thereof, styrene and a derivative thereof, an epoxy resin, and a fatty amine-based epoxy curing agent.
  • the present invention also provides a high transmittance PSVA type liquid crystal display panel, comprising an upper substrate, a lower substrate disposed opposite to the upper substrate, and stacked on top of the upper substrate facing the lower substrate from top to bottom a first common electrode, an insulating layer, a second common electrode, a pixel electrode disposed on a side of the lower substrate facing the upper substrate, a liquid crystal layer interposed between the second common electrode and the pixel electrode, And a plurality of polymer protrusions disposed on the surface of the second common electrode and the pixel electrode;
  • One of the first common electrode and the second common electrode is a patterned common electrode, and corresponding to each sub-pixel, the patterned common electrode is divided into a plurality of regions, each region having a common electrode extending in different directions a pattern of branches and slits spaced apart; the other is a planar common electrode of uniform thickness and continuous uninterrupted;
  • the pixel electrode is a planar electrode having a uniform thickness and continuous uninterrupted;
  • the polymer protrusions align liquid crystal molecules in the liquid crystal layer such that the liquid crystal molecules have a certain pretilt angle
  • the first common electrode is a planar common electrode
  • the second common electrode is a patterned common electrode; in the process of the high transmittance PSVA type liquid crystal display panel, the pixel electrode and the Applying a voltage to the second common electrode; applying a voltage to the pixel electrode and the first common electrode during use of the high transmittance PSVA type liquid crystal display panel;
  • the patterned common electrode has a "m-shaped" pattern
  • the polymer protrusions are formed by polymerization of a polymerizable monomer by UV light.
  • the present invention provides a high transmittance PSVA type liquid crystal display panel, wherein a first common electrode, an insulating layer, and a second common electrode are disposed on the upper substrate, and a pixel electrode is disposed on the lower substrate.
  • the second common electrode and the pixel electrode surface are provided with a plurality of polymer protrusions to align liquid crystal molecules, and one of the first common electrode and the second common electrode is a picture Forming the common electrode, corresponding to each sub-pixel, the patterned common electrode is divided into a plurality of regions, each region having a pattern of common electrode branches and slits extending in different directions; the other is uniform thickness, continuous not A discontinuous planar type common electrode; the pixel electrode is a planar electrode having a uniform thickness and continuous uninterrupted.
  • liquid crystal molecules can be caused to fall in different directions along the slit, in each sub-pixel.
  • the problem of lowering the transmittance caused by the pixel electrode pattern improves the transmittance and brightness uniformity of the PSVA type liquid crystal display panel, reduces the requirement of the backlight brightness of the PSVA type liquid crystal display panel, and reduces the cost and power consumption. .
  • the present invention provides a method for fabricating a high transmittance PSVA type liquid crystal display panel, by forming a first common electrode, an insulating layer, and a second common electrode on the upper substrate, forming a pixel electrode on the lower substrate, and the One of the common electrode and the second common electrode is a patterned common electrode, and the other is a planar common electrode, and the pixel electrode is a planar electrode, and polymerizable monomers are polymerized by UV light to form a polymer protrusion.
  • the alignment of the liquid crystal molecules enables the PSVA type liquid crystal display panel to have high transmittance and uniform brightness, and reduces the need for backlight brightness of the PSVA type liquid crystal display panel, thereby reducing cost and power consumption.
  • FIG. 1 is a schematic cross-sectional view of a conventional VA type liquid crystal display panel
  • FIG. 2 is a plan top plan view showing a lower substrate side of a conventional MVA liquid crystal display panel
  • FIG. 3 is a schematic cross-sectional view of a conventional MVA type liquid crystal display panel corresponding to A-A in FIG. 2;
  • FIG. 4 is a schematic cross-sectional view showing a conventional PSVA type liquid crystal display panel
  • FIG. 5 is a top plan view showing a pixel electrode in the conventional PSVA liquid crystal display panel shown in FIG. 4;
  • FIG. 6 is a plan bottom plan view of a common electrode in the conventional PSVA type liquid crystal display panel shown in FIG. 4;
  • FIG. 7 to FIG. 9 are schematic diagrams showing key processes of the conventional PSVA type liquid crystal display panel shown in FIG. 4;
  • Figure 10 is a cross-sectional view showing a PSVA type liquid crystal display panel of the present invention.
  • FIG. 11 is a top plan view showing a pixel electrode in a PSVA type liquid crystal display panel of the present invention.
  • FIG. 12 is a plan bottom plan view of a first common electrode in a PSVA type liquid crystal display panel of the present invention.
  • FIG. 13 is a plan bottom plan view of a second common electrode in a PSVA type liquid crystal display panel of the present invention.
  • FIG. 14 is a flow chart showing a method of fabricating a PSVA type liquid crystal display panel of the present invention.
  • step 1 is a schematic diagram of step 1 of a method for fabricating a PSVA type liquid crystal display panel of the present invention
  • step 2 is a schematic diagram of step 2 of a method for fabricating a PSVA type liquid crystal display panel of the present invention
  • step 3 is a schematic diagram of step 3 of a method for fabricating a PSVA type liquid crystal display panel of the present invention.
  • Figure 18 is a schematic view showing the PSVA type liquid crystal display panel of the present invention in use.
  • the present invention firstly provides a high transmittance PSVA type liquid crystal display panel, comprising an upper substrate 1 and a lower substrate 2 disposed opposite to the upper substrate 1 and stacked in a stack from top to bottom. a first common electrode 31 facing the lower substrate 2, an insulating layer 32, and a second common electrode 33, and a pixel electrode disposed on a side of the lower substrate 2 facing the upper substrate 1 4.
  • a liquid crystal layer interposed between the second common electrode 33 and the pixel electrode 4, and a plurality of polymer protrusions 5 provided on the surface of the second common electrode 33 and the pixel electrode 4.
  • One of the first common electrode 31 and the second common electrode 33 is a patterned common electrode, and the patterned common electrode is divided into a plurality of regions corresponding to each of the sub-pixels, and each region has a direction extending in different directions.
  • the pattern of the common electrode branch and the slit spacing; the other is a planar common electrode having a uniform thickness and continuous uninterrupted.
  • the pixel electrode 4 is a planar electrode having a uniform thickness and continuous uninterrupted.
  • the polymer protrusions 5 align the liquid crystal molecules 7 in the liquid crystal layer such that the liquid crystal molecules 7 have a certain pretilt angle.
  • first common electrode 31 is a planar common electrode and the second common electrode 33 is a patterned common electrode.
  • the second common electrode 33 is a planar common electrode
  • the first common electrode 31 is a patterned common electrode.
  • the patterned common electrode functions during the process of the high transmittance PSVA type liquid crystal display panel, and the planar common electrode functions during use of the high transmittance PSVA type liquid crystal display panel.
  • the pixel is A voltage is applied between the electrode 4 and the second common electrode 33, and an oblique electric field can be formed between the pixel electrode 4 and the second common electrode 33, so that the liquid crystal molecules 7 fall down in different directions along the slit, and are formed in each sub-pixel. Domains, in combination with subsequent polymerization of the polymerizable monomers by UV light to form polymer protrusions 5, so that the liquid crystal molecules 7 have a certain pretilt angle.
  • the high transmittance PSVA type liquid crystal display panel as shown in FIG.
  • a voltage is applied to the pixel electrode 4 and the first common electrode 31, since the pixel electrode 4 and the first common electrode 31 are All of them are planar electrodes, and the electric field formed between them is uniform, and the entire pixel region can simultaneously achieve the maximum transmittance, solving the problem of lowering the transmittance caused by the pixel electrode pattern in the prior art, and improving the PSVA type liquid crystal.
  • the transmittance and brightness uniformity of the display panel reduce the need for backlight brightness of the PSVA type liquid crystal display panel, and reduce cost and power consumption.
  • the second common electrode 33 is a planar common electrode and the first common electrode 31 is a patterned common electrode
  • a voltage is applied to the pixel electrode 4 and the first common electrode 31; during use of the high transmittance PSVA type liquid crystal display panel, a voltage is applied to the pixel electrode 4 and the second common electrode 33.
  • the upper substrate 1 is generally a CF substrate in the prior art
  • the lower substrate 2 is generally a TFT substrate in the prior art.
  • the patterned common electrode has a "m-shaped" pattern.
  • the material of the first common electrode 31, the second common electrode 33, and the pixel electrode 4 is ITO;
  • the material of the insulating layer 32 is silicon nitride or silicon oxide.
  • the polymerizable monomer is one or a combination of an acrylate and a derivative thereof, a methacrylate and a derivative thereof, styrene and a derivative thereof, an epoxy resin, and a fatty amine-based epoxy curing agent.
  • the present invention further provides a method for fabricating a high transmittance PSVA type liquid crystal display panel, comprising the following steps:
  • Step 1 As shown in FIG. 15, the upper substrate 1 and the lower substrate 2 are provided.
  • first common electrode 31 and the second common electrode 33 are a patterned common electrode, and the patterned common electrode is divided into a plurality of regions corresponding to each of the sub-pixels, each region having a common electrode branch and a narrow direction extending in different directions
  • the pattern of the slit spacing; the other is a planar common electrode of uniform thickness and continuous uninterrupted.
  • a pixel electrode 4 is formed on the lower substrate 2, and the pixel electrode 4 is a planar electrode having a uniform thickness and continuous uninterrupted.
  • first common electrode 31 is a planar common electrode and the second common electrode 33 is a patterned common electrode.
  • the patterned common electrode and the planar common electrode may be interchanged, that is, the second common electrode 33 is a planar common electrode, and the first common electrode 31 is a patterned common electrode.
  • the upper and lower substrates 1 and 2 are paired, and a mixture of the liquid crystal molecules 7 and the polymerizable monomer 5' is filled between the second common electrode 33 and the pixel electrode 4.
  • Step 2 Apply a voltage to the pixel electrode 4 and the patterned common electrode to cause the liquid crystal molecules 7 to fall in different directions along the slit to form a multi-domain in each sub-pixel.
  • the second common electrode 33 is a patterned common electrode
  • the first common electrode 31 is a planar common electrode
  • the step 2 is applied to the pixel electrode 4 and the second common electrode 33.
  • the voltage forms an oblique electric field that causes the liquid crystal molecules 7 to fall in different directions along the slit.
  • Step 3 as shown in FIG. 17, the second common electrode 33 is still patterned as a common electrode, and the first common electrode 31 is a planar common electrode, for the pixel electrode 4 and the patterned common electrode. That is, while the voltage is applied to the second common electrode 33, the polymerizable monomer 5' is polymerized by UV light irradiation to form a polymer protrusion 5 attached to the surface of the pixel electrode 4 and the second common electrode 33.
  • the liquid crystal molecules 7 in the liquid crystal layer are aligned such that the liquid crystal molecules 7 have a certain pretilt angle.
  • the patterned common electrode has a “m-shaped” pattern, and the material of the first common electrode 31, the second common electrode 33, and the pixel electrode 4 is ITO, and the material of the insulating layer 32 is nitrided. Silicon, or silicon oxide.
  • the second common electrode 33 is a patterned common electrode
  • the first common electrode 31 is a planar common electrode.
  • a voltage is applied to the pixel electrode 4 and the first common electrode 31. Since the pixel electrode 4 and the first common electrode 31 are both planar electrodes, an electric field formed between the two is uniform, and the entire pixel region can simultaneously achieve maximum wear.
  • the transmittance solves the problem of lowering the transmittance caused by the pixel electrode pattern in the prior art, improves the transmittance and brightness uniformity of the PSVA type liquid crystal display panel, reduces the requirement of the backlight brightness of the PSVA type liquid crystal display panel, and reduces the cost. versus Use power consumption.
  • the high transmittance PSVA type liquid crystal display panel of the present invention has a first common electrode, an insulating layer, and a second common electrode disposed on the upper substrate, and a pixel electrode disposed on the lower substrate, in the second common a plurality of polymer protrusions are disposed on the surface of the electrode and the pixel electrode to align the liquid crystal molecules, and one of the first common electrode and the second common electrode is a patterned common electrode corresponding to each of the sub-pixels, the patterned common electrode Divided into a plurality of regions, each of which has a pattern of common electrode branches and slits extending in different directions; the other is a planar common electrode having a uniform thickness and continuous uninterrupted; the pixel electrodes are uniform in thickness and continuous Intermittent planar electrode.
  • liquid crystal molecules can be caused to fall in different directions along the slit, in each sub-pixel. Forming a multi-domain therein; during the use of the high-transmission PSVA type liquid crystal display panel, by applying a voltage to the pixel electrode and the planar common electrode, the entire pixel region can simultaneously achieve the maximum transmittance, and the solution is solved.
  • the problem of lowering the transmittance caused by the pixel electrode pattern improves the transmittance and brightness uniformity of the PSVA type liquid crystal display panel, reduces the requirement of the backlight brightness of the PSVA type liquid crystal display panel, and reduces the cost and power consumption.
  • a pixel electrode is formed on a lower substrate by forming a first common electrode, an insulating layer, and a second common electrode on the upper substrate, and the first common electrode
  • One of the second common electrodes is a patterned common electrode, and the other is a planar common electrode.
  • the pixel electrode is a planar electrode, and the polymerizable monomer is polymerized by UV light to form a polymer protrusion to the liquid crystal molecule.
  • the alignment can make the PSVA type liquid crystal display panel have high transmittance and uniform brightness, reduce the requirement of backlight brightness of the PSVA type liquid crystal display panel, and reduce cost and power consumption.

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Abstract

一种高穿透率PSVA型液晶显示面板及其制作方法。该液晶显示面板在上基板(1)上设置第一公共电极(31)、绝缘层(32)、与第二公共电极(33)，在下基板(2)上设置像素电极(4)，在第二公共电极(33)与像素电极(4)表面设置多个聚合物突起(5)对液晶分子(7)配向，且第一、第二公共电极(31、33)的其中之一为图案化公共电极，另一个为平面型公共电极，像素电极(4)为平面型电极。在制程过程中，通过对像素电极(4)与图案化公共电极施加电压，能够使液晶分子(7)向不同方向倒伏，在每一个子像素内形成多畴；在使用过程中，通过对像素电极(4)与平面型公共电极施加电压，能够使整个像素区域同时达到最大的穿透率。

Description

高穿透率PSVA型液晶显示面板及其制作方法 技术领域
本发明涉及显示技术领域，尤其涉及一种高穿透率PSVA型液晶显示面板及其制作方法。
背景技术
主动式薄膜晶体管液晶显示器(Thin Film Transistor-LCD，TFT-LCD)近年来得到了飞速的发展和广泛的应用。就目前主流市场上的TFT-LCD显示面板而言，可分为三种类型，分别是扭曲向列(Twisted Nematic，TN)或超扭曲向列(Super Twisted Nematic，STN)型，平面转换(In-Plane Switching，IPS)型、及垂直配向(Vertical Alignment，VA)型。其中VA型液晶显示器相对其他种类的液晶显示器具有极高的对比度，一般可达到4000-8000，在大尺寸显示，如电视等方面具有非常广的应用。
VA型液晶显示面板之所以具有极高的对比度是因为在不加电的暗态时，液晶分子垂直于基板表面排列，不产生任何相位差，漏光极低，暗态亮度很小，根据对比度计算公式暗态亮度越低，则对比度越高。为了使VA型液晶显示面板中的液晶分子能够垂直于基板表面排列，需要对液晶分子进行垂直配向处理，现行最为普遍的做法是在上、下基板表面的特定区域涂布垂直配向剂(高分子材料聚酰亚胺，Polyimide，PI溶液)，然后将基板在一定温度下进行长时间烘烤，使配向剂中的溶剂被烤干，从而在基板表面形成PI配向层。如图1所示，传统的VA型液晶显示面板包括：上基板10、与上基板10相对设置的下基板20、夹于下基板10和上基板20之间的液晶层40，形成于上基板10面向下基板20一侧表面及下基板20面向上基板10一侧表面的PI配向层30。由于VA型液晶显示面板采用垂直转动的液晶，液晶分子双折射率的差异比较大，导致大视角下的色偏(color shift)问题比较严重。
为了使VA型液晶显示面板获得更好的广视角特性，改善色偏问题，通常会采取多畴VA技术(multi-domain VA，MVA)，即将一个子像素划分成多个区域，并使每个区域中的液晶在施加电压后倒伏向不同的方向，从而使各个方向看到的效果趋于平均，一致。实现MVA技术的方法有多种，请参阅图2与图3，其中一种方法是将一侧的ITO像素电极70处理成“米字型”图案，公共电极80为厚度均匀、连续不间断的平面电极，由于特殊的 ITO像素电极图案，其产生的倾斜电场可以诱导不同区域中的液晶分子40倒向不同的方向。
图2所示为一种MVA型液晶显示面板的下基板20一侧的平面俯视示意图，其中210与220分别为扫描线与数据线，一个子像素被划分成了四个区域，各个区域内的ITO像素电极70均形成有向不同方向延伸的像素电极分支与狭缝间隔的图案。图3所示为该MVA型液晶显示面板在对应图2中A-A处的剖面示意图，其中具有狭缝的像素电极70设于平坦的下钝化层60上，覆盖于像素电极70上的PI配向层30的表面凹凸不平，而平面型的公共电极80设于平坦的上钝化层90上，覆盖于公共电极80上的PI配向层30的表面呈一平面。
随着技术的发展，出现了一种不需要使用PI配向层的MVA型液晶显示面板，称为聚合物稳定垂直配向(polymer-stabilized vertical alignment，PSVA)型液晶显示面板，如图4至图6所示，被处理成“米字型”图案的像素电极400设于下基板200上，平面型的公共电极300设于上基板100上，附着于像素电极400与公共电极300表面的聚合物突起500为液晶层内的液晶分子700提供一定方向的预倾角。图7至图9为该现有的PSVA型液晶显示面板关键制程的示意图：首先在上基板100上制作平面型的公共电极300，在下基板200上制作被处理成“米字型”图案的像素电极400，将上、下基板对组并填充液晶分子700与可聚合单体500’的混合物；然后对公共电极300与像素电极400施加电压，使液晶分子700按照设计的方向，即被处理成“米字型”图案的像素电极400的狭缝的方向倒伏；再使用紫外光(Ultraviolet Rays，UV光)照射，使可聚合单体500’反应形成附着于像素电极400与公共电极300表面的聚合物突起500，为液晶分子700提供一定方向的预倾角。在上述制程过程中，被处理成“米字型”图案的像素电极400起到了重要作用，若像素电极不具有“米字型”图案，施加电压后液晶分子的倒伏方向将变的随机不可控。
由于被处理成“米字型”图案的像素电极400具有向不同方向延伸的像素电极分支与狭缝间隔的图案，导致其与对侧公共电极300形成的电场不均，对应于像素电极分支区域的电场明显强于对应于狭缝区域的电场，从而导致像素内出现亮度不均的现象。
另外，根据VA型液晶显示面板的穿透率的公式：
Figure PCTCN2015082164-appb-000001
其中T为穿透率，ΔΦ为液晶长轴与偏光片夹角，45°时效率最大；Γ 为相位差，即由液晶分子在电场驱动下偏转对偏振光的调制效果。
Γ的计算公式为：
Γ＝cos(a)*2π*Δn*d/λ  (2)
其中，a为液晶分子长轴与基板法线的夹角，其大小受液晶分子受到的电场大小决定，d为液晶盒盒厚，Δn为液晶长短轴折射率差。
由公式(1)可知，当Γ为π时穿透率最大。公式(1)结合公式(2)可知，在液晶层盒厚d不变的情况下，穿透率T的大小由施加于液晶的电场大小决定：当Γ小于π时，电场越大，穿透率T越大；当Γ大于π时，电场越大，穿透率T越小。
由于像素电极分支与狭缝各自对应区域的电场大小不均，无法使这两部分区域的穿透率同时达到最大值，也就是说，像素电极分支对应区域的Γ为π时，狭缝对应区域的Γ小于π；而当狭缝对应区域的Γ达到π时，像素电极分支对应区域的Γ已超过π。因此，整个像素区域内无法同时达到最大的穿透率，也就无法达到液晶显示面板的最大穿透率，液晶显示面板的亮度不均匀。
发明内容
本发明的目的在于提供一种高穿透率PSVA型液晶显示面板，能够使整个像素区域同时达到最大的穿透率，解决现有技术中由像素电极图案导致的穿透率降低的问题，提高PSVA型液晶显示面板的穿透率和亮度均匀性，降低PSVA型液晶显示面板对背光亮度的需求，降低成本与使用功耗。
本发明的目的还在于提供一种高穿透率PSVA型液晶显示面板的制作方法，通过该方法制作的PSVA型液晶显示面板，穿透率高、亮度均匀，能够降低PSVA型液晶显示面板对背光亮度的需求，降低成本与使用功耗。
为实现上述目的，本发明提供一种PSVA型液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、自上而下依次层叠设置于所述上基板面向所述下基板一侧的第一公共电极、绝缘层、与第二公共电极、设于所述下基板面向所述上基板一侧的像素电极、夹设于所述第二公共电极与像素电极之间的液晶层、及设于所述第二公共电极与像素电极表面的多个聚合物突起；
所述第一公共电极与第二公共电极的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极；
所述像素电极为厚度均匀、连续不间断的平面型电极；
所述聚合物突起对所述液晶层内的液晶分子配向，使得液晶分子具有一定的预倾角；
在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与图案化公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与平面型公共电极施加电压。
所述第一公共电极为平面型公共电极，所述第二公共电极为图案化公共电极；在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与第二公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与第一公共电极施加电压。
所述第二公共电极为平面型公共电极，所述第一公共电极为图案化公共电极；在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与第一公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与第二公共电极施加电压。
所述图案化公共电极具有“米字型”图案。
所述第一公共电极、第二公共电极、及像素电极的材料为ITO；
所述绝缘层的材料为氮化硅、或氧化硅。
所述聚合物突起由可聚合单体经UV光照发生聚合反应形成。
所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或组合。
本发明还提供一种PSVA型液晶显示面板的制作方法，包括如下步骤：
步骤1、提供上基板、与下基板；
先在上基板上依次形成第一公共电极、覆盖所述第一公共电极的绝缘层、及位于所述绝缘层上的第二公共电极；所述第一公共电极与第二公共电极的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极；
在下基板上形成像素电极，所述像素电极为厚度均匀、连续不间断的平面型电极；
再将上、下基板对组，并在第二公共电极与像素电极之间填充液晶分子与可聚合单体的混合物；
步骤2、对所述像素电极与图案化公共电极施加电压，使液晶分子沿所述狭缝向不同方向倒伏，在每一个子像素内形成多畴；
步骤3、对所述像素电极与图案化公共电极施加电压的同时，使用UV 光照射，使所述可聚合单体发生聚合反应形成附着于像素电极与第二公共电极表面的聚合物突起，以对所述液晶层内的液晶分子配向，使得液晶分子具有一定的预倾角。
所述图案化公共电极具有“米字型”图案，所述第一公共电极、第二公共电极、及像素电极的材料为ITO，所述绝缘层的材料为氮化硅、或氧化硅。
所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或组合。
本发明还提供一种高穿透率PSVA型液晶显示面板，包括上基板、与所述上基板相对设置的下基板、自上而下依次层叠设置于所述上基板面向所述下基板一侧的第一公共电极、绝缘层、与第二公共电极、设于所述下基板面向所述上基板一侧的像素电极、夹设于所述第二公共电极与像素电极之间的液晶层、及设于所述第二公共电极与像素电极表面的多个聚合物突起；
所述第一公共电极与第二公共电极的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极；
所述像素电极为厚度均匀、连续不间断的平面型电极；
所述聚合物突起对所述液晶层内的液晶分子配向，使得液晶分子具有一定的预倾角；
在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与图案化公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与平面型公共电极施加电压；
其中，所述第一公共电极为平面型公共电极，所述第二公共电极为图案化公共电极；在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与第二公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与第一公共电极施加电压；
其中，所述图案化公共电极具有“米字型”图案；
其中，所述聚合物突起由可聚合单体经UV光照发生聚合反应形成。
本发明的有益效果：本发明提供的一种高穿透率PSVA型液晶显示面板，在上基板上设置第一公共电极、绝缘层、与第二公共电极，在下基板上设置像素电极，在所述第二公共电极与像素电极表面设置多个聚合物突起对液晶分子配向，且所述第一公共电极与第二公共电极的其中之一为图 案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极；所述像素电极为厚度均匀、连续不间断的平面型电极。在所述高穿透率PSVA型液晶显示面板的制程过程中，通过对所述像素电极与图案化公共电极施加电压，能够使液晶分子沿所述狭缝向不同方向倒伏，在每一个子像素内形成多畴；在所述高穿透率PSVA型液晶显示面板的使用过程中，通过对所述像素电极与平面型公共电极施加电压，能够使整个像素区域同时达到最大的穿透率，解决现有技术中由像素电极图案导致的穿透率降低的问题，提高PSVA型液晶显示面板的穿透率和亮度均匀性，降低PSVA型液晶显示面板对背光亮度的需求，降低成本与使用功耗。本发明提供的一种高穿透率PSVA型液晶显示面板的制作方法，通过在上基板上形成第一公共电极、绝缘层、与第二公共电极，在下基板上形成像素电极，且所述第一公共电极与第二公共电极的其中之一为图案化公共电极，另一个为平面型公共电极，所述像素电极为平面型电极，通过UV光照使可聚合单体发生聚合反应形成聚合物突起对液晶分子配向，能够使得PSVA型液晶显示面板的穿透率高、亮度均匀，降低PSVA型液晶显示面板对背光亮度的需求，降低成本与使用功耗。
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其它有益效果显而易见。
附图中，
图1为一种现有的VA型液晶显示面板的剖面示意图；
图2为一种现有的MVA型液晶显示面板的下基板一侧的平面俯视示意图；
图3为一种现有的MVA型液晶显示面板在对应图2中A-A处的剖面示意图；
图4为一种现有的的PSVA型液晶显示面板的剖面示意图；
图5为图4所示现有的PSVA型液晶显示面板中像素电极的平面俯视示意图；
图6为图4所示现有的PSVA型液晶显示面板中公共电极的平面仰视示意图；
图7至图9为图4所示现有的PSVA型液晶显示面板的关键制程的示意图；
图10为本发明的PSVA型液晶显示面板的剖面示意图；
图11为本发明的PSVA型液晶显示面板中像素电极的平面俯视示意图；
图12为本发明的PSVA型液晶显示面板中第一公共电极的平面仰视示意图；
图13为本发明的PSVA型液晶显示面板中第二公共电极的平面仰视示意图；
图14为本发明的PSVA型液晶显示面板的制作方法的流程图；
图15为本发明的PSVA型液晶显示面板的制作方法的步骤1的示意图；
图16为本发明的PSVA型液晶显示面板的制作方法的步骤2的示意图；
图17为本发明的PSVA型液晶显示面板的制作方法的步骤3的示意图；
图18为本发明的PSVA型液晶显示面板在使用状态下的示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请同时参阅图10至图13，本发明首先提供一种高穿透率PSVA型液晶显示面板，包括上基板1、与所述上基板1相对设置的下基板2、自上而下依次层叠设置于所述上基板1面向所述下基板2一侧的第一公共电极31、绝缘层32、与第二公共电极33、设于所述下基板2面向所述上基板1一侧的像素电极4、夹设于所述第二公共电极33与像素电极4之间的液晶层、及设于所述第二公共电极33与像素电极4表面的多个聚合物突起5。
所述第一公共电极31与第二公共电极33的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极。
所述像素电极4为厚度均匀、连续不间断的平面型电极。
所述聚合物突起5对所述液晶层内的液晶分子7配向，使得液晶分子7具有一定的预倾角。
图10、图12与图13示意出了所述第一公共电极31为平面型公共电极，所述第二公共电极33为图案化公共电极的情况。当然，也可以将案化公共 电极与平面型公共电极互换位置，即所述第二公共电极33为平面型公共电极，所述第一公共电极31为图案化公共电极。
所述图案化公共电极在该高穿透率PSVA型液晶显示面板的制程过程中起作用，而所述平面型公共电极在该高穿透率PSVA型液晶显示面板的使用过程中起作用。
以所述第一公共电极31为平面型公共电极，所述第二公共电极33为图案化公共电极为例，在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极4与第二公共电极33施加电压，能够在像素电极4与第二公共电极33之间形成倾斜电场，使液晶分子7沿所述狭缝向不同方向倒伏，在每一个子像素内形成多畴，配合后续的通过UV光照使可聚合单体发生聚合反应形成聚合物突起5，使得液晶分子7具有一定的预倾角。在所述高穿透率PSVA型液晶显示面板的使用过程中，如图18所示，对所述像素电极4与第一公共电极31施加电压，由于所述像素电极4与第一公共电极31均为平面型电极，在二者之间形成的电场均匀，整个像素区域能够同时达到最大的穿透率，解决现有技术中由像素电极图案导致的穿透率降低的问题，提高PSVA型液晶显示面板的穿透率和亮度均匀性，降低PSVA型液晶显示面板对背光亮度的需求，降低成本与使用功耗。
当然，若所述第二公共电极33为平面型公共电极，所述第一公共电极31为图案化公共电极，那么在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极4与第一公共电极31施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极4与第二公共电极33施加电压。
具体地，所述上基板1通常为现有技术中的CF基板，所述下基板2通常为现有技术中的TFT基板。
如图13所示，所述图案化公共电极具有“米字型”图案。
所述第一公共电极31、第二公共电极33、及像素电极4的材料为ITO；
所述绝缘层32的材料为氮化硅、或氧化硅。
所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或组合。
请参阅图14，本发明还提供一种高穿透率PSVA型液晶显示面板的制作方法，包括如下步骤：
步骤1、如图15所示，提供上基板1、与下基板2。
先在上基板1上依次形成第一公共电极31、覆盖所述第一公共电极31的绝缘层32、及位于所述绝缘层32上的第二公共电极33；所述第一公共 电极31与第二公共电极33的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极。在下基板2上形成像素电极4，所述像素电极4为厚度均匀、连续不间断的平面型电极。
图12、图13示意出了所述第一公共电极31为平面型公共电极，所述第二公共电极33为图案化公共电极的情况。当然，也可以将图案化公共电极与平面型公共电极互换位置，即所述第二公共电极33为平面型公共电极，所述第一公共电极31为图案化公共电极。
再将上、下基板1、2对组，并在第二公共电极33与像素电极4之间填充液晶分子7与可聚合单体5’的混合物。
步骤2、对所述像素电极4与图案化公共电极施加电压，使液晶分子7沿所述狭缝向不同方向倒伏，在每一个子像素内形成多畴。
图16以所述第二公共电极33为图案化公共电极，所述第一公共电极31为平面型公共电极为例，示意出了该步骤2对所述像素电极4与第二公共电极33施加电压形成倾斜电场，使液晶分子7沿所述狭缝向不同方向倒伏。
步骤3、如图17所示，仍以所述第二公共电极33为图案化公共电极，所述第一公共电极31为平面型公共电极为例，对所述像素电极4与图案化公共电极即第二公共电极33施加电压的同时，使用UV光照射，使所述可聚合单体5’发生聚合反应形成附着于像素电极4与第二公共电极33表面的聚合物突起5，以对所述液晶层内的液晶分子7配向，使得液晶分子7具有一定的预倾角。
至此，完成该高穿透率PSVA型液晶显示面板的制作。
具体地，所述图案化公共电极具有“米字型”图案，所述第一公共电极31、第二公共电极33、及像素电极4的材料为ITO，所述绝缘层32的材料为氮化硅、或氧化硅。
如图18所示，还是以所述第二公共电极33为图案化公共电极，所述第一公共电极31为平面型公共电极为例，当使用通过上述方法制作的液晶显示面板时，对所述像素电极4与第一公共电极31施加电压，由于所述像素电极4与第一公共电极31均为平面型电极，在二者之间形成的电场均匀，整个像素区域能够同时达到最大的穿透率，解决现有技术中由像素电极图案导致的穿透率降低的问题，提高PSVA型液晶显示面板的穿透率和亮度均匀性，降低PSVA型液晶显示面板对背光亮度的需求，降低成本与 使用功耗。
综上所述，本发明的高穿透率PSVA型液晶显示面板，在上基板上设置第一公共电极、绝缘层、与第二公共电极，在下基板上设置像素电极，在所述第二公共电极与像素电极表面设置多个聚合物突起对液晶分子配向，且所述第一公共电极与第二公共电极的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极；所述像素电极为厚度均匀、连续不间断的平面型电极。在所述高穿透率PSVA型液晶显示面板的制程过程中，通过对所述像素电极与图案化公共电极施加电压，能够使液晶分子沿所述狭缝向不同方向倒伏，在每一个子像素内形成多畴；在所述高穿透率PSVA型液晶显示面板的使用过程中，通过对所述像素电极与平面型公共电极施加电压，能够使整个像素区域同时达到最大的穿透率，解决现有技术中由像素电极图案导致的穿透率降低的问题，提高PSVA型液晶显示面板的穿透率和亮度均匀性，降低PSVA型液晶显示面板对背光亮度的需求，降低成本与使用功耗。本发明的高穿透率PSVA型液晶显示面板的制作方法，通过在上基板上形成第一公共电极、绝缘层、与第二公共电极，在下基板上形成像素电极，且所述第一公共电极与第二公共电极的其中之一为图案化公共电极，另一个为平面型公共电极，所述像素电极为平面型电极，通过UV光照使可聚合单体发生聚合反应形成聚合物突起对液晶分子配向，能够使得PSVA型液晶显示面板的穿透率高、亮度均匀，降低PSVA型液晶显示面板对背光亮度的需求，降低成本与使用功耗。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (13)

  1. 一种高穿透率PSVA型液晶显示面板，包括上基板、与所述上基板相对设置的下基板、自上而下依次层叠设置于所述上基板面向所述下基板一侧的第一公共电极、绝缘层、与第二公共电极、设于所述下基板面向所述上基板一侧的像素电极、夹设于所述第二公共电极与像素电极之间的液晶层、及设于所述第二公共电极与像素电极表面的多个聚合物突起；
    所述第一公共电极与第二公共电极的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极；
    所述像素电极为厚度均匀、连续不间断的平面型电极；
    所述聚合物突起对所述液晶层内的液晶分子配向，使得液晶分子具有一定的预倾角；
    在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与图案化公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与平面型公共电极施加电压。
  2. 如权利要求1所述的高穿透率PSVA型液晶显示面板，其中，所述第一公共电极为平面型公共电极，所述第二公共电极为图案化公共电极；在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与第二公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与第一公共电极施加电压。
  3. 如权利要求1所述的高穿透率PSVA型液晶显示面板，其中，所述第二公共电极为平面型公共电极，所述第一公共电极为图案化公共电极；在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与第一公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与第二公共电极施加电压。
  4. 如权利要求1所述的高穿透率PSVA型液晶显示面板，其中，所述图案化公共电极具有“米字型”图案。
  5. 如权利要求1所述的高穿透率PSVA型液晶显示面板，其中，所述第一公共电极、第二公共电极、及像素电极的材料为ITO；
    所述绝缘层的材料为氮化硅、或氧化硅。
  6. 如权利要求1所述的高穿透率PSVA型液晶显示面板，其中，所述 聚合物突起由可聚合单体经UV光照发生聚合反应形成。
  7. 如权利要求6所述的高穿透率PSVA型液晶显示面板，其中，所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或组合。
  8. 一种高穿透率PSVA型液晶显示面板的制作方法，其中，包括如下步骤：
    步骤1、提供上基板、与下基板；
    先在上基板上依次形成第一公共电极、覆盖所述第一公共电极的绝缘层、及位于所述绝缘层上的第二公共电极；所述第一公共电极与第二公共电极的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极；
    在下基板上形成像素电极，所述像素电极为厚度均匀、连续不间断的平面型电极；
    再将上、下基板对组，并在第二公共电极与像素电极之间填充液晶分子与可聚合单体的混合物；
    步骤2、对所述像素电极与图案化公共电极施加电压，使液晶分子沿所述狭缝向不同方向倒伏，在每一个子像素内形成多畴；
    步骤3、对所述像素电极与图案化公共电极施加电压的同时，使用UV光照射，使所述可聚合单体发生聚合反应形成附着于像素电极与第二公共电极表面的聚合物突起，以对所述液晶层内的液晶分子配向，使得液晶分子具有一定的预倾角。
  9. 如权利要求8所述的高穿透率PSVA型液晶显示面板的制作方法，其中，所述图案化公共电极具有“米字型”图案，所述第一公共电极、第二公共电极、及像素电极的材料为ITO，所述绝缘层的材料为氮化硅、或氧化硅。
  10. 如权利要求8所述的高穿透率PSVA型液晶显示面板的制作方法，其中，所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或组合。
  11. 一种高穿透率PSVA型液晶显示面板，包括上基板、与所述上基板相对设置的下基板、自上而下依次层叠设置于所述上基板面向所述下基板一侧的第一公共电极、绝缘层、与第二公共电极、设于所述下基板面向所述上基板一侧的像素电极、夹设于所述第二公共电极与像素电极之间的液晶层、及设于所述第二公共电极与像素电极表面的多个聚合物突起；
    所述第一公共电极与第二公共电极的其中之一为图案化公共电极，对应于每一个子像素，该图案化公共电极被划分为多个区域，各个区域具有向不同方向延伸的公共电极分支与狭缝间隔的图案；另一个为厚度均匀、连续不间断的平面型公共电极；
    所述像素电极为厚度均匀、连续不间断的平面型电极；
    所述聚合物突起对所述液晶层内的液晶分子配向，使得液晶分子具有一定的预倾角；
    在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与图案化公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与平面型公共电极施加电压；
    其中，所述第一公共电极为平面型公共电极，所述第二公共电极为图案化公共电极；在所述高穿透率PSVA型液晶显示面板的制程过程中，对所述像素电极与第二公共电极施加电压；在所述高穿透率PSVA型液晶显示面板的使用过程中，对所述像素电极与第一公共电极施加电压；
    其中，所述图案化公共电极具有“米字型”图案；
    其中，所述聚合物突起由可聚合单体经UV光照发生聚合反应形成。
  12. 如权利要求11所述的高穿透率PSVA型液晶显示面板，其中，所述第一公共电极、第二公共电极、及像素电极的材料为ITO；
    所述绝缘层的材料为氮化硅、或氧化硅。
  13. 如权利要求11所述的高穿透率PSVA型液晶显示面板，其中，所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或组合。
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