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WO2014056246A1 - Va显示模式补偿架构及va显示模式液晶显示装置 - Google Patents

Va显示模式补偿架构及va显示模式液晶显示装置 Download PDF

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Publication number
WO2014056246A1
WO2014056246A1 PCT/CN2012/083165 CN2012083165W WO2014056246A1 WO 2014056246 A1 WO2014056246 A1 WO 2014056246A1 CN 2012083165 W CN2012083165 W CN 2012083165W WO 2014056246 A1 WO2014056246 A1 WO 2014056246A1
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Prior art keywords
liquid crystal
layer
crystal cell
degrees
vertical alignment
Prior art date
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Ceased
Application number
PCT/CN2012/083165
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English (en)
French (fr)
Inventor
康志聪
海博
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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 US13/807,712 priority Critical patent/US20140098328A1/en
Publication of WO2014056246A1 publication Critical patent/WO2014056246A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—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
    • G02F1/133742—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
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/05—Single plate on one side of the LC cell
    • 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
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/12—Biaxial compensators

Definitions

  • VA display mode compensation architecture and VA display mode liquid crystal display device
  • the present invention relates to a liquid crystal display device, and more particularly to a VA (Vertical Alignment) display mode compensation architecture and a VA display mode liquid crystal display device.
  • VA Vertical Alignment
  • a TFT (Thin Film Transistor)-LCD is a thin film transistor LCD which is one of an active matrix type liquid crystal display (AM-LCD).
  • LCD flat panel display especially 'j TFT-LCD, is the only display device that fully catches up and exceeds CRT in terms of brightness, contrast, power consumption, life, volume and weight. Its performance is excellent and mass production. Good characteristics, high degree of automation, low cost of raw materials, and broad development space will quickly become the mainstream products of the new century and a bright spot for global economic growth in the 21st century.
  • the linear liquid crystal for producing a liquid crystal display is a substance having a birefringence ⁇ .
  • the numerator produces two refracted rays.
  • the birefringence An ne-no, ne indicates the refractive index of the liquid crystal molecule for ordinary light, and no indicates the refractive index of the liquid crystal molecule for extraordinary light. Therefore, when the light passes through the liquid crystal sandwiched between the upper and lower pieces of glass, the light will have a phase retardation phenomenon.
  • the light characteristics of the liquid crystal cell are usually measured by the phase retardation LC And, also known as the optical path difference, ⁇ is the birefringence, d is the thickness of the liquid crystal cell, and the difference in phase retardation at different viewing angles of the liquid crystal cell is the origin of the viewing angle problem.
  • the phase retardation of a good optical compensation film can cancel out the phase retardation of the linear liquid crystal, and the viewing angle of the liquid crystal panel can be widened.
  • the compensation principle of the optical compensation film is generally to correct the phase difference generated by the liquid crystal at different viewing angles, so that the birefringence properties of the liquid crystal molecules are compensated for symmetry. ⁇ Compensation with optical compensation film can effectively reduce the leakage of dark state pictures Light can greatly improve the contrast of the picture within a certain angle of view.
  • the optical compensation film can be distinguished from the functional purpose of the phase difference film, the chromatic aberration compensation film, and the viewing angle expansion film.
  • the use of an optical compensation film can reduce the amount of light leakage in the dark state of the liquid crystal display, and can greatly improve the contrast, chromaticity and overcome some gray scale inversion problems in a certain viewing angle.
  • the main parameters for measuring the characteristics of the optical compensation film include the in-plane retardation (compensation) value Ro (also called Re) in the plane direction, the thickness retardation (compensation) value Rth (out-of-plane retardation) in the thickness direction, and the refractive index.
  • Rth [ ( Nx+Ny ) /2— Nz] xd
  • Nx is the refractive index along the slow axis (the axis with the largest refractive index, that is, the direction of vibration where the light has a slower propagation velocity) in the plane of the film
  • Ny is the fast axis along the plane of the film (with the smallest refractive index)
  • Nz is the refractive index in the plane of the film (perpendicular to Nx and Ny).
  • IPS in-plane switching
  • MULTI-DOMAIN VERTICAL ALIGNMENT multi-region vertical alignment
  • PVA PATTERNED VERTICAL ALIGNMENT
  • TN+FILM Transmission Nematic TFT-LCD + Optical Compensation Film
  • FIG. 1A shows a single-layer Biaxial compensation structure for the VA display mode in the prior art, which mainly includes a TAC (Triacetyl Cellulose) layer 11 and a PVA (polyvinyl alcohol) from top to bottom.
  • Layer 12 TAC layer 13, PSA (pressure sensitive adhesive) layer 14, vertical alignment liquid crystal cell (VA cell) 15, PSA layer 16, biaxial compensation film (Biaxial) 17, PVA layer 18, and TAC layer 19, only A layer of biaxial compensation film 17 is provided.
  • FIG. 1B shows a double-layer Biaxial compensation structure for the VA display mode in the prior art, which mainly includes a stacked TAC layer 21, a PVA layer 22, a biaxial compensation film 23, and a PSA from top to bottom.
  • the layer 24, the vertical alignment liquid crystal cell 25, the PSA layer 26, the biaxial compensation film 27, the PVA layer 28, and the TAC layer 29 have a two-layered biaxial compensation film 23 and a biaxial compensation film 27.
  • Figure 1 A and Figure 1B mainly show The compensation structure, therefore, omits the structure of the glass substrate, and actually the vertical alignment liquid crystal cell is packaged between the two substrates.
  • the PSA layer acts primarily as a paste bond.
  • the PVA layer is a polarizing layer made of polyvinyl alcohol, and its specific configuration can be determined by its absorption axis angle.
  • the TAC layer is mainly used to protect the PVA layer, improve the mechanical properties of the PVA layer, and prevent the PVA layer from retracting.
  • Each TAC layer also has an out-of-plane retardation value Rth.
  • FIG. 2A is a schematic diagram of a dark state light leakage distribution of the compensation architecture shown in FIG. 1A
  • FIG. 2B is a schematic diagram of a dark state light leakage distribution of the compensation architecture shown in FIG.
  • the light leakage distribution in Fig. 2A and Fig. 2B is represented by the change of the brightness with the viewing angle.
  • the four concentric circles in the figure respectively represent the vertical viewing angles of 20 degrees, 40 degrees, 60 degrees, and 80 degrees from the inside to the outside; The number represents the size of the horizontal viewing angle. Since the optical compensation film does not change with voltage like the liquid crystal, it is impossible to compensate all the gray levels. Therefore, it is usually selected to compensate the dark state of the liquid crystal to improve the contrast at a large viewing angle.
  • FIG 3 it is a schematic diagram of the slow axis and absorption axis angle setting of the compensation architecture shown in Figure 1A, showing the current single-layer dual-axis compensation film compensation architecture and its slow axis and absorption axis angle settings.
  • the TAC layer 11, the PVA layer 12, the TAC layer 13, the PSA layer 14, the vertical alignment liquid crystal cell 15, the PSA layer 16, the biaxial compensation film 17, the PVA layer 18, and the TAC layer 19 are sequentially stacked from top to bottom to be vertically aligned.
  • the horizontal viewing angle of the liquid crystal cell 15 is based on the 0 degree direction, the absorption axis of the PVA layer 12 is set at 0 degrees, the slow axis of the TAC layer 13 is set at 90 degrees, and the slow axis of the biaxial compensation film 17 is set at 0 degrees, and the PVA layer 18 is provided.
  • the absorption axis is set at 90 degrees.
  • the single-layer dual-axis compensation film architecture in Figure 2A compensates for the LCAnd and compensation values used in the dark state.
  • the single layer dual axis compensation film architecture of Figure 2A is configured in accordance with the LCAnd and compensation values shown.
  • the LCAnd (phase retardation) of the vertical alignment liquid crystal cell 15 is 352. lnm
  • the in-plane retardation Ro of the biaxial compensation film 17 is 72 nm
  • the thickness retardation Rth of the biaxial compensation film 17 is 240 nm
  • VA display mode compensation architecture capable of deflecting a sharp viewing angle of a dark state to a vertical viewing angle, increasing the contrast and sharpness of a near horizontal viewing angle.
  • Another object of the present invention is to provide a VA display mode liquid crystal display device in which a dark state where light leakage is severe is close to an up and down vertical viewing angle, and a dark state light leakage close to a horizontal viewing angle is lowered to effectively improve contrast and sharpness of a near horizontal viewing angle.
  • the present invention provides a VA display mode compensation architecture, including a first TAC layer, a first polarizing layer, a biaxial compensation film, a vertical alignment liquid crystal cell, and a second TAC layer, which are sequentially arranged from top to bottom.
  • the second polarizing layer and the third TAC layer are based on the horizontal viewing angle of the vertical alignment liquid crystal cell, that is, the VA liquid crystal display, and the absorption axis of the first polarizing layer is
  • the 0 degree setting, the slow axis of the biaxial compensation film is set at 90 degrees, the slow axis of the second TAC layer is set at 0 degrees, and the absorption axis of the second polarizing layer is set at 90 degrees.
  • the first polarizing layer and the second polarizing layer are PVA layers.
  • the PSA layer is respectively disposed on the upper and lower sides of the vertical alignment liquid crystal cell.
  • phase alignment LCAnd of the vertical alignment liquid crystal cell is 342.8 ⁇ 361.4 nm.
  • pre-tilt angle of the vertical alignment liquid crystal cell ranges from [85, 90) degrees.
  • the in-plane retardation Ro of the biaxial compensation film is 54 to 78 nm, and the thickness retardation Rth of the biaxial compensation film is 180 to 260 nm.
  • the vertical alignment liquid crystal cell is a multi-region vertical alignment liquid crystal cell.
  • the vertical alignment liquid crystal cell is a four-area or eight-area vertical alignment liquid crystal cell.
  • the present invention also provides a VA display mode compensation architecture, including a first TAC layer, a first polarizing layer, a biaxial compensation film, a vertical alignment liquid crystal cell, a second TAC layer, a second polarizing layer, and the like, which are sequentially arranged from top to bottom.
  • the third TAC layer is based on the horizontal viewing angle 0 degree direction of the vertical alignment liquid crystal cell, that is, the VA liquid crystal display, the absorption axis of the first polarizing layer is set at 0 degrees, and the slow axis of the biaxial compensation film is set at 90 degrees.
  • the slow axis of the second TAC layer is set at 0 degrees, and the absorption axis of the second polarizing layer is set at 90 degrees;
  • the first polarizing layer and the second polarizing layer are PVA layers;
  • the PSA layer is respectively disposed on the upper and lower sides of the vertical alignment liquid crystal cell; wherein, the phase retardation LCAnd of the vertical alignment liquid crystal cell is 342.8 ⁇ 361.4 nm; wherein the pretilt angle range of the vertical alignment liquid crystal cell is [ 85,90) degrees;
  • the in-plane retardation Ro of the biaxial compensation film is 54 to 78 nm, and the thickness retardation Rth of the biaxial compensation film is 180 to 260 nm;
  • the vertical alignment liquid crystal cell is a multi-region vertical alignment liquid crystal cell
  • the vertical alignment liquid crystal cell is a four-area or eight-area vertical alignment liquid crystal cell.
  • the present invention also provides a VA display mode liquid crystal display device comprising a first TAC layer arranged in order from top to bottom, a first polarizing layer, a biaxial compensation film, a first substrate, a vertical alignment liquid crystal cell, a second substrate,
  • the second TAC layer, the second polarizing layer and the third TAC layer are based on the horizontal viewing angle 0 degree direction of the vertical alignment liquid crystal cell, that is, the VA display mode liquid crystal display device, and the absorption axis of the first polarizing layer is 0 degree.
  • the slow axis of the biaxial compensation film is set at 90 degrees
  • the slow axis of the second TAC layer is set at 0 degrees
  • the absorption axis of the second polarizing layer is set at 90 degrees.
  • the VA display mode compensation architecture of the invention can deflect the sharp view of the dark state to the vertical angle of view, and increase the contrast and sharpness of the near horizontal view, which can be compensated by the compensation value of the single layer double-axis compensation film and the compensation of the TAC layer. Value to achieve the desired dark state light leakage effect.
  • the dark region where the light leakage is severe is close to the upper and lower vertical viewing angles, and the dark state leakage near the horizontal viewing angle is remarkably lowered, effectively improving the contrast and sharpness of the horizontal viewing angle.
  • FIG. 1A is a schematic diagram of a single-layer dual-axis compensation film compensation architecture for a VA display mode in the prior art
  • 1B is a schematic diagram of a double-layer dual-axis compensation film compensation architecture for the VA display mode in the prior art
  • FIG. 2A is a schematic diagram of a dark state light leakage distribution of the compensation architecture shown in FIG. 1A;
  • FIG. 2B is a schematic diagram of a dark state light leakage distribution of the compensation architecture shown in FIG. 1B;
  • FIG. 3 is a schematic diagram of the slow axis and absorption axis angle setting of the compensation architecture shown in FIG. 1A;
  • FIG. 4 is a schematic diagram of the VA display mode compensation architecture and the slow axis and absorption axis angle settings thereof according to the present invention;
  • Fig. 9 is a schematic view showing the distribution of dark state light leakage after the improvement of the VA display mode compensation architecture of the present invention. detailed description
  • the VA display mode compensation architecture of the present invention mainly includes a first TAC layer 41, a first PVA layer 42, a biaxial compensation film 43, a vertical alignment liquid crystal cell 45, a second TAC layer 47, and a second PVA which are sequentially arranged from top to bottom.
  • the layer 48 and the third TAC layer 49 are based on the horizontal viewing angle 0 degree direction of the vertical alignment liquid crystal cell 45.
  • the absorption axis of the first PVA layer 42 is set at 0 degrees, and the slow axis of the biaxial compensation film 43 is 90 degrees.
  • the degree setting, the slow axis of the second TAC layer 47 is set at 0 degrees, and the absorption axis of the second PVA layer 48 is set at 90 degrees.
  • the preferred embodiment changes the compensation architecture of the current single-layer dual-axis compensation film, and deflects the dark-state light leakage viewing angle to a vertical viewing angle.
  • the utility model can be applied to various types of liquid crystals for vertical alignment liquid crystal cells.
  • the first PSA layer 44 and the second PSA layer 46 may be respectively disposed on the upper and lower sides of the vertical alignment liquid crystal cell 45, and may be used for bonding a glass substrate or the like.
  • the compensation structure shown in FIG. 4 is used as the compensation parameter of Table 1 above to obtain a dark state light leakage distribution diagram as shown in FIG. 5.
  • the light leakage distribution in Fig. 5 is expressed by the change of the brightness with the viewing angle.
  • the four concentric circles in the figure represent the vertical viewing angles of 20 degrees, 40 degrees, 60 degrees, and 80 degrees from the inside to the outside; the numbers indicated on the outside of the 80 degree concentric circles The size of the horizontal viewing angle. It can be seen from Fig. 5 that the dark region with severe light leakage is close to the vertical and vertical viewing angles, and the dark state leakage near the horizontal viewing angle is significantly reduced, so that the contrast and sharpness of the near horizontal viewing angle can be effectively improved.
  • FIG. 6 is a schematic structural diagram of a VA display mode liquid crystal display device of the present invention.
  • the VA display mode liquid crystal display device of the present invention mainly comprises a first TAC layer 61, a first PVA layer 62, a biaxial compensation film 63, a first substrate 64, a vertical alignment liquid crystal cell 65, and a second substrate which are sequentially arranged from top to bottom. 66.
  • the second TAC layer 67, the second PVA layer 68, and the third TAC layer 69 are set at a 0 degree angle of the horizontal viewing angle of the vertical alignment liquid crystal cell 65, and the absorption axis of the first PVA layer 62 is set at 0 degrees.
  • the slow axis of the biaxial compensation film 63 is set at 90 degrees
  • the slow axis of the second TAC layer 67 is set at 0 degrees
  • the absorption axis of the second PVA layer 68 is set at 90 degrees.
  • Figure 6 Only the case where the VA display mode compensation architecture of the present invention is applied to the VA display mode liquid crystal display device is exemplified, and only the main structure of the liquid crystal display device is included, and actually, a structure such as a liquid crystal cell driving circuit may be included, and the vertical alignment liquid crystal cell 65 is provided.
  • the PSA layer can be separately provided on the upper and lower sides.
  • a single layer double-axis compensation film can be matched.
  • the compensation value and the TAC compensation value are used to simulate the dark state light leakage, and then find the range of compensation values corresponding to the required dark state light leakage.
  • the compensation value (delay value) of the biaxial compensation film 63 and the second TAC layer 67 is adjusted to simulate the dark state light leakage, and then the required compensation value range of the dark state light leakage is found.
  • the pre-tilt angle (Pre-tilt) of the vertical alignment liquid crystal cell 65 is set to [85, 90) degrees; the vertical alignment liquid crystal cell 65 is set to a four-zone (4 domain) vertical alignment liquid crystal cell, and the liquid crystal tilt angle is 45 degrees, 135 degrees, 225 degrees, 315 degrees; phase delay LC And in the [342.8, 361.4] nm interval.
  • the source used is set to: Simulate the blue yttrium aluminum garnet (Blue-YAG LED) LED spectrum; the central brightness is defined as 100 nits; the source distribution is Lambert s distribution.
  • TAC compensation values By combining different single-layer biaxial compensation film compensation values and TAC compensation values, a small dark state light leakage and light leakage are selected. The range of best compensation values for the range.
  • the simulation results are shown in Fig. 7 and Fig. 8.
  • ⁇ is the Rth value of the single-layer biaxial compensation film.
  • the VA display mode compensation architecture and the VA display mode liquid crystal display device of the present invention for the LCAnd interval [342.8, 361.4] nm, the pretilt angle interval [85, 90) degrees, by changing the current single layer double axis compensation film compensation architecture, The dark state of the light leakage is deflected to a vertical angle.
  • the dark-state light leakage is further attenuated by changing the single-layer biaxial compensation value and the compensation value of the TAC layer, and the light leakage is concentrated in a small range. That is, the phase delay LCAnd of the vertical alignment liquid crystal cell is in the [342.8, 361.4] nm interval, and the pretilt angle is in the [85, 90) degree interval, and the compensation value of the single-layer biaxial compensation film and the compensation value of the TAC layer can be properly matched. To achieve the ideal dark state light leakage effect.
  • the compensation value can be changed by the following three methods:
  • the thickness d is changed to change the compensation value
  • the refractive index N is changed to change the compensation value
  • the thickness d and the refractive index N are simultaneously changed to change the compensation value.
  • the serious horizontal light leakage phenomenon caused by the compensation of the current single-layer biaxial compensation film can be improved, the contrast and sharpness of the near horizontal viewing angle are increased, and the light leakage is weakened and the light leakage area is concentrated in a small viewing angle range.
  • LCAnd 352.1nm
  • pretilt angle 89 degrees
  • compensation value of single-layer biaxial compensation film Ro 66nm
  • Rth 220nm
  • the VA display mode compensation architecture improves the dark state light leakage distribution diagram.
  • the light leakage distribution in FIG. 9 is represented by the change of the brightness with the viewing angle.
  • the four concentric circles in the figure respectively represent the vertical viewing angle of 20 degrees and 40 degrees from the inside to the outside. 60 degrees, and 80 degrees; the number marked outside the 80 degree concentric circle indicates the size of the horizontal viewing angle.
  • the improved single-layer biaxial compensation film compensates for dark state light leakage concentrated near the vertical viewing angle, the light leakage range is concentrated in a small viewing angle range, and the light leakage amount is significantly lower than the current one. Dark state light leakage caused by single layer compensation.
  • the VA display mode compensation architecture and the VA display mode liquid crystal display device of the present invention limit the compensation value range of the compensation film, and not for a specific compensation film, and the compensation values of other compensation films are also within the scope of the claims.
  • the VA display mode compensation architecture of the present invention can deflect the sharp viewing angle of the dark state to the vertical viewing angle, increase the contrast and sharpness of the near horizontal viewing angle, and can reasonably match the compensation value of the single layer double-axis compensation film.
  • the compensation value of the TAC layer to achieve the desired dark state light leakage effect.
  • the dark light leakage region is close to the vertical vertical viewing angle, and the dark state light leakage near the horizontal viewing angle is significantly reduced, effectively improving the contrast and sharpness of the horizontal viewing angle.

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  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
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Description

VA显示模式补偿架构及 VA显示模式液晶显示装置 技术领域
本发明涉及液晶显示装置， 尤其涉及一种 VA (垂直配向）显示模式 补偿架构及 VA显示模式液晶显示装置。 背景技术
TFT(Thin Film Transistor)-LCD即薄膜晶体管 LCD, 是有源矩阵类型 液晶显示器 (AM-LCD)中的一种。 液晶平板显示器， 特另' j TFT-LCD, 是目 前唯一在亮度、 对比度、 功耗、 寿命、 体积和重量等综合性能上全面赶上 和超过 CRT的显示器件， 它的性能优良、 大规模生产特性好， 自动化程度 高， 原材料成本低廉， 发展空间广阔， 将迅速成为新世纪的主流产品， 是 21世纪全球经济增长的一个亮点。
但是， 随着 TFT-LCD 的观察角度增大， 画面的对比度不断降低， 画 面的清晰度下降， 这是液晶层中液晶分子的双折射率随观察角度变化发生 改变的结果。 对于普通的液晶显示屏来说， 当从某个角度观看普通的液晶 显示屏时， 将发现它的亮度急遽的损失（变暗）及变色。 传统的液晶显示 器通常只有 90度的视角， 也就是左 /右两边各 45度。 如果只有一位观看者 的话， 这个问题可以忽略， 例如笔记本显示屏， 但是如果有超过一位以上 的观看者， 例如想要展示某个画面给客人看或是多人一起玩游戏机， 大概 只能一直听他们抱怨显示器的质量有多糟糕。
制作液晶显示器的线状液晶是一种具有双折射率 Δη 的物质， 当光线 通过液晶分子后， 可分成寻常光线 （ ordinary ray ) 与非常光线 ( extraordinary ray ) 两道光， 如果光线是斜向入射液晶分子， 便会产生两 道折射光线， 双折射率 An=ne-no , ne 表示液晶分子对寻常光线的折射 率， no表示液晶分子对非常光线的折射率。 因此当光线经过上下两片玻璃 所夹住的液晶后， 光线就会产生相位延迟 (phase retardation)的现象。 液晶 盒的光线特性通常用相位延迟 LC And来衡量， 也称为光程差， Δη为双折 射率， d 为液晶盒厚度， 液晶盒不同视角下相位延迟的不同是其产生视角 问题的由来。 良好的光学补偿膜的相位延迟可以跟线状液晶的相位延迟互 相抵消， 就可以增广液晶面板的可视角度。 光学补偿膜的补偿原理一般是 将液晶在不同视角产生的相位差进行修正， 让液晶分子的双折射性质得到 对称性的补偿。 釆用光学补偿膜进行补偿， 可以有效降低暗态画面的漏 光， 在一定视角内能大幅度提高画面的对比度。
光学补偿膜从其功能目的来区分则可略为分单纯改变相位的位相差 膜、 色差补偿膜及视角扩大膜等。 使用光学补偿膜能降低液晶显示器暗态 时的漏光量， 并且在一定视角内能大幅提高影像之对比、 色度与克服部分 灰阶反转问题。 衡量光学补偿膜特性的主要参数包括在平面方向上的面内 延迟（补偿）值 Ro (通常也称为 Re ) , 在厚度方向上的厚度延迟（补 偿）值 Rth (面外延迟） ， 折射率 N, 以及膜厚度 d, 满足如下关系式： Ro= ( Nx— Ny ) xd;
Rth=[ ( Nx+Ny ) /2— Nz] xd;
其中， Nx是膜平面内沿着慢轴 （具有最大折射率的轴， 也就是光线 具有较慢传播速率的振动方向） 的折射率， Ny是膜平面内沿着快轴 （具 有最小折射率的轴， 也就是光波具有较快传播速率的振动方向， 垂直于 Nx ) 的折射率， Nz是膜平面方向的折射率 （垂直于 Nx和 Ny ) 。
目前， 制造商们为了改善液晶显示器的视角特性， 提出了多种宽视角 技术， 例如面内切换 ( IPS , IN-PLANE SWITCHING ) 、 多区域垂直配向 ( MVA , MULTI-DOMAIN VERTICAL ALIGNMENT ) 、 图案垂直配向 ( PVA, PATTERNED VERTICAL ALIGNMENT ) 、 TN+FILM (扭曲向列 型 TFT-LCD+光学补偿膜）等， 这些技术都能把液晶显示器的视角增加到 160度， 甚至更多。 针对不同的液晶显示模式， 也即不同的液晶盒类型， 使用的光学补偿膜也不同， 而且 Ro和 Rth值也需调节为合适的值。 现有 大尺寸液晶电视使用的光学补偿膜大多是针对 VA (垂直配向） 显示模 式， 早期使用的有 Konica (柯尼卡）公司的 N-TAC , 后来不断发展形成 OPTES (奥普士）公司的 Zeonor, 富士通的 F-TAC 系列， 日东电工的 X- plate等。
参见图 1A及图 1B , 其为目前针对 VA显示模式常用的补偿架构。 图
1A所示为现有技术中针对 VA显示模式的单层 Biaxial (双轴补偿膜）补 偿架构， 由上至下主要包括 TAC (三醋酸纤维素， Triacetyl Cellulose)层 11 , PVA (聚乙烯醇）层 12, TAC层 13 , PSA (压敏胶）层 14, 垂直配 向液晶盒（VA cell ) 15 , PSA层 16, 双轴补偿膜（Biaxial ) 17 , PVA层 18 , 及 TAC层 19, 仅具有一层双轴补偿膜 17。 图 1B所示为现有技术中 针对 VA显示模式的双层 Biaxial (双轴补偿膜）补偿架构， 由上至下主要 包括层叠设置的 TAC层 21 , PVA层 22, 双轴补偿膜 23 , PSA层 24, 垂 直配向液晶盒 25 , PSA层 26, 双轴补偿膜 27 , PVA层 28 , 及 TAC层 29, 具有两层双轴补偿膜 23、 双轴补偿膜 27。 图 1 A及图 1B主要显示了 补偿架构， 因此省略了玻璃基板之类的结构， 实际上垂直配向液晶盒是封 装于两基板之间。 PSA层主要起粘贴连接作用。 PVA层即为由聚乙烯醇制 成的偏光层， 其具体配置可用其吸收轴角度来确定。 TAC层主要用于保护 PVA层， 提升 PVA层的机械性能， 防止 PVA层回缩， 各 TAC层还分别具 有面外延迟值 Rth。
参见图 2A及图 2B, 图 2A为图 1A所示补偿架构的暗态漏光分布示 意图， 图 2B为图 1B所示补偿架构的暗态漏光分布示意图。 对于垂直配向 液晶盒来说， 暗态时即为液晶驱动电压为 0时。 图 2A及图 2B中漏光分布 以亮度随视角的变化来表示， 图中 4个同心圓由内至外分别表示垂直视角 20度， 40度， 60度， 及 80度； 80度同心圓外面标注的数字表示水平视 角的大小。 由于光学补偿膜不像液晶一样会随着电压而变化， 因此， 不可 能使所有灰度级都得到补偿， 因此通常是选择液晶暗态进行补偿， 提高其 在大视角的对比度。
如图 3 所示， 其为图 1A所示补偿架构的慢轴、 吸收轴角度设定示意 图， 显示了现行单层双轴补偿膜补偿架构及其慢轴、 吸收轴角度设定。 TAC层 11、 PVA层 12、 TAC层 13、 PSA层 14、 垂直配向液晶盒 15、 PSA层 16、 双轴补偿膜 17、 PVA层 18及 TAC层 19由上至下顺序层叠设 置， 以垂直配向液晶盒 15的水平视角 0度方向为基准， PVA层 12的吸收 轴呈 0度设置， TAC层 13的慢轴呈 90度设置， 双轴补偿膜 17的慢轴呈 0度设置， PVA层 18的吸收轴呈 90度设置。
、 图 2A中单层双轴补偿膜架构补偿暗态使用的 LCAnd和补偿值
Figure imgf000005_0001
结合如上表一， 按照所示 LCAnd和补偿值配置图 2A中的单层双轴补 偿膜架构。 垂直配向液晶盒 15 的 LCAnd (相位延迟）为 352. lnm, 双轴 补偿膜 17 的面内延迟 Ro 为 72nm, 双轴补偿膜 17 的厚度延迟 Rth为 240nm, TAC层 13的厚度延迟 Rth为 35.4nm。 可知在水平视角 phi=20〜40 度， phi=140〜160度， phi=200〜220度， phi=310〜330度的位置漏光严重， 即接近水平位置的视角暗态漏光严重。 因此， 现行单层双轴补偿膜补偿架 构暗态漏光严重的视角接近水平视角。
通过图 2A及图 2B可看出， 釆用现行双层双轴补偿膜补偿， 暗态漏光 严重的视角在水平与垂直视角中间； 釆用现行单层双轴补偿膜补偿， 相对 于双层双轴补偿膜补偿， 暗态漏光严重的视角更接近水平视角， 而观众与 液晶显示屏的相对位置决定了接近水平的视角更容易被观众看到， 所以这 些视角的对比度、 清晰度对观看效果的影响最大。 而大视角因为不容易被 看到， 对观众的影响较小， 所以我们希望把漏光区域限定在近垂直视角附 近。 为了提高观看效果， 应该釆用双层双轴补偿膜补偿， 但是它的价格比 较昂贵， 不利于降低成本。 而釆用单层双轴补偿膜补偿虽然可以有效的降 低成本， 但是接近水平的视角暗态漏光严重， 对比度低， 影响观看效果。 发明内容
因此， 本发明的目的在于提供一种 VA显示模式补偿架构， 能够使暗 态漏光严重的视角往垂直视角偏转， 增加近水平视角的对比度和清晰度。
本发明的另一目的在于提供一种 VA显示模式液晶显示装置， 其暗态 漏光严重的区域接近上下垂直视角， 降低接近水平视角的暗态漏光以有效 的提高接近水平视角的对比度和清晰度。
为实现上述目的， 本发明提供了一种 VA显示模式补偿架构， 包括由 上至下顺序配置的第一 TAC 层、 第一偏光层、 双轴补偿膜、 垂直配向液 晶盒、 第二 TAC层、 第二偏光层及第三 TAC层， 以该垂直配向液晶盒也 即 VA液晶显示器的水平视角 0度方向为基准， 该第一偏光层的吸收轴呈
0度设置， 该双轴补偿膜的慢轴呈 90度设置， 该第二 TAC层的慢轴呈 0 度设置， 该第二偏光层的吸收轴呈 90度设置。
其中， 所述第一偏光层和第二偏光层为 PVA层。
其中， 所述垂直配向液晶盒的上下两侧分别设有 PSA层。
其中 , 所述垂直配向液晶盒的相位延迟 LCAnd为 342.8〜361.4nm。 其中， 所述垂直配向液晶盒的预倾角范围为 [85,90 )度。
其中， 所述双轴补偿膜的面内延迟 Ro为 54〜78nm, 所述双轴补偿膜 的厚度延迟 Rth为 180〜260 nm。
其中， 所述垂直配向液晶盒为多区域垂直配向液晶盒。
其中， 所述垂直配向液晶盒为四区域或八区域垂直配向液晶盒。
本发明还提供一种 VA显示模式补偿架构， 包括由上至下顺序配置的 第一 TAC 层、 第一偏光层、 双轴补偿膜、 垂直配向液晶盒、 第二 TAC 层、 第二偏光层及第三 TAC层， 以该垂直配向液晶盒也即 VA液晶显示器 的水平视角 0度方向为基准， 该第一偏光层的吸收轴呈 0度设置， 该双轴 补偿膜的慢轴呈 90度设置， 该第二 TAC层的慢轴呈 0度设置， 该第二偏 光层的吸收轴呈 90度设置；
其中， 所述第一偏光层和第二偏光层为 PVA层； 其中， 所述垂直配向液晶盒的上下两侧分别设有 PSA层； 其中 , 所述垂直配向液晶盒的相位延迟 LCAnd为 342.8〜361.4nm; 其中， 所述垂直配向液晶盒的预倾角范围为 [85,90 )度；
其中， 所述双轴补偿膜的面内延迟 Ro为 54〜78nm, 所述双轴补偿膜 的厚度延迟 Rth为 180〜260 nm;
其中， 所述垂直配向液晶盒为多区域垂直配向液晶盒；
其中， 所述垂直配向液晶盒为四区域或八区域垂直配向液晶盒。
本发明还提供了一种 VA显示模式液晶显示装置， 包括由上至下顺序 配置的第一 TAC 层、 第一偏光层、 双轴补偿膜、 第一基板、 垂直配向液 晶盒、 第二基板、 第二 TAC层、 第二偏光层及第三 TAC层， 以该垂直配 向液晶盒也即该 VA显示模式液晶显示装置的水平视角 0度方向为基准， 该第一偏光层的吸收轴呈 0度设置， 该双轴补偿膜的慢轴呈 90度设置， 该第二 TAC层的慢轴呈 0度设置， 该第二偏光层的吸收轴呈 90度设置。
本发明的 VA显示模式补偿架构能够使暗态漏光严重的视角往垂直视 角偏转， 增加近水平视角的对比度和清晰度， 可以通过合理的搭配单层双 轴补偿膜的补偿值和 TAC 层的补偿值来达到理想的暗态漏光效果。 本发 明的 VA 显示模式液晶显示装置其暗态漏光严重的区域接近上下垂直视 角， 接近水平视角的暗态漏光明显降低， 有效的提高接近水平视角的对比 度和清晰度。 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 的技术方案及其他有益效果显而易见。
附图中，
图 1A为现有技术中针对 VA显示模式的单层双轴补偿膜补偿架构示 意图；
图 1B 为现有技术中针对 VA显示模式的双层双轴补偿膜补偿架构示 意图；
图 2A为图 1A所示补偿架构的暗态漏光分布示意图；
图 2B为图 1B所示补偿架构的暗态漏光分布示意图；
图 3为图 1A所示补偿架构的慢轴、 吸收轴角度设定示意图； 图 4为本发明 VA显示模式补偿架构及其慢轴、 吸收轴角度设定的示 意图；
图 5为图 4所示补偿架构的暗态漏光分布示意图； 图 6为本发明 VA显示模式液晶显示装置的架构示意图； 图 7为 LC And =342.8 nm暗态漏光集中在大视角时漏光随补偿值变化 趋势示意图；
图 8为 LC And =361.4 nm暗态漏光集中在大视角时漏光随补偿值变化 趋势示意图；
图 9为应用本发明 VA显示模式补偿架构改善后的暗态漏光分布示意 图。 具体实施方式
如图 4所示， 其为本发明 VA显示模式补偿架构及其慢轴、 吸收轴角 度设定的示意图。 本发明的 VA显示模式补偿架构主要包括由上至下顺序 配置的第一 TAC层 41、 第一 PVA层 42、 双轴补偿膜 43、 垂直配向液晶 盒 45、 第二 TAC层 47、 第二 PVA层 48及第三 TAC层 49 , 以该垂直配 向液晶盒 45的水平视角 0度方向为基准， 该第一 PVA层 42的吸收轴呈 0 度设置， 该双轴补偿膜 43的慢轴呈 90度设置， 该第二 TAC层 47的慢轴 呈 0度设置， 该第二 PVA层 48的吸收轴呈 90度设置。 该较佳实施例改变 了现行单层双轴补偿膜的补偿架构， 使暗态漏光视角往垂直视角偏转， 作 为一种补偿架构， 其可应用于各种类型的釆用垂直配向液晶盒的液晶显示 装置中。 垂直配向液晶盒 45的上下两侧可以分别设有第一 PSA层 44及第 二 PSA层 46 , 可用于粘接玻璃基板等结构。
参见图 5 , 对图 4所示补偿架构使用如前述表一的补偿参数， 得到如 图 5所示的暗态漏光分布示意图。 图 5中漏光分布以亮度随视角的变化来 表示， 图中 4个同心圓由内至外分别表示垂直视角 20度， 40度， 60度， 及 80度； 80度同心圓外面标注的数字表示水平视角的大小。 由图 5可以 看出， 暗态漏光严重的区域已经接近上下垂直视角， 而接近水平视角的暗 态漏光明显降低， 这样就可以有效的提高接近水平视角的对比度和清晰 度。
参见图 6 , 其为本发明 VA显示模式液晶显示装置的架构示意图。 本 发明的 VA显示模式液晶显示装置主要包括由上至下顺序配置的第一 TAC 层 61、 第一 PVA层 62、 双轴补偿膜 63、 第一基板 64、 垂直配向液晶盒 65、 第二基板 66、 第二 TAC层 67、 第二 PVA层 68及第三 TAC层 69 , 以该垂直配向液晶盒 65的水平视角 0度方向为基准， 该第一 PVA层 62的 吸收轴呈 0度设置， 该双轴补偿膜 63 的慢轴呈 90度设置， 该第二 TAC 层 67的慢轴呈 0度设置， 该第二 PVA层 68的吸收轴呈 90度设置。 图 6 仅举例说明将本发明的 VA显示模式补偿架构应用于 VA显示模式液晶显 示装置的情况， 仅包括了液晶显示装置的主要结构， 实际上还可以包括液 晶盒驱动电路等结构， 垂直配向液晶盒 65上下两侧可分别设有 PSA层。
对于本发明的 VA显示模式补偿架构及 VA显示模式液晶显示装置， 为了保证漏光集中在上下垂直视角附近， 并且进一步保证漏光量和漏光范 围要尽量小， 可以通过搭配不同的单层双轴补偿膜补偿值和 TAC 补偿值 来模拟暗态漏光， 然后找出需要的暗态漏光对应的补偿值范围。
下面以图 6 所示的架构为例， 通过调整双轴补偿膜 63 及第二 TAC层 67的补偿值（延迟值）来模拟暗态漏光， 然后找出需要的暗态漏光对应的 补偿值范围。 垂直配向液晶盒 65 的预倾角 （Pre-tilt )设定为 [85,90 )度； 垂直配向液晶盒 65设定为四区域 ( 4domain )垂直配向液晶盒， 液晶倾角 为 45度， 135度， 225度， 315度； 相位延迟 LC And在 [342.8, 361.4]nm 区间。 所使用的光源设定为： 模拟使用蓝色钇铝石榴石 （Blue-YAG LED ) LED光谱； 中央亮度定义为 100 尼特； 光源分布为朗伯分布 ( Lambert s distribution ) 。
选取 LCAnd=342.8nm, 361.4nm; 预倾角 =89度为例进行说明， 通过 搭配不同的单层双轴补偿膜补偿值和 TAC 补偿值进行模拟， 选出了较小 的暗态漏光量和漏光范围对应的最佳补偿值范围。 模拟结果参见图 7和图 8, 图 7为 LCAnd =342.8 nm暗态漏光集中在大视角时漏光随补偿值变化 趋势示意图， 图 8为 LCAnd =361.4 nm暗态漏光集中在大视角时漏光随补 偿值变化趋势示意图。
在模拟中， 可发现不同预倾角下， 单层双轴补偿膜和 TAC 的补偿值 对暗态漏光的影响趋势是一致的。 即不同预倾角下， 暗态漏光最小时对应 的补偿值范围是一样的。 如下表二所示， 根据模拟找到了 LCAnd 在 [342.8, 361.4]nm区间， 预倾角在 [85,90 )度区间， 暗态漏光小于 0.2尼特 (预倾角 =89度时模拟出的暗态漏光值， 非实测值） 时对应的单层双轴补 偿膜和 TAC的补偿值范围。
表二、 暗态漏光小于 0.2尼特（预倾角 =89度） 时对应的单层双轴补 偿膜和 TAC的补偿值范围
Figure imgf000009_0002
对于 TAC层的 Rth值范围， 其中，
Figure imgf000009_0001
x+AAS.SS , Y2=- 0.0021χ2-0.0169χ+218.3 , χ为单层双轴补偿膜 Rth值。 本发明的 VA显示模式补偿架构及 VA显示模式液晶显示装置， 针对 LCAnd 区间 [342.8, 361.4]nm, 预倾角区间 [85,90 )度， 通过改变现行单层 双轴补偿膜补偿的架构， 让暗态漏光严重的角度往垂直视角偏转。 同时进 一步通过改变单层双轴补偿值和 TAC 层的补偿值来减弱暗态漏光并且保 证漏光集中在较小的范围。 即垂直配向液晶盒的相位延迟 LCAnd 在 [342.8, 361.4]nm区间， 预倾角在 [85,90 )度区间时， 可以通过合理的搭配 单层双轴补偿膜的补偿值和 TAC 层的补偿值来达到理想的暗态漏光效 果。
找到了合适的补偿值范围， 又知道补偿值 Ro、 Rth和折射率N、 厚度 d的关系如下：
Ro= ( Nx— Ny ) xd;
Rth=[ ( Nx+Ny ) /2— Nz] d„
在实际设计时， 可以通过以下三种方法来改变补偿值：
1、 在现行单层双轴补偿膜和 TAC层折射率 Ν的基础上， 改变厚度 d 来改变补偿值；
2、 在现行单层双轴补偿膜和 TAC层厚度 d的基础上， 改变折射率 N 来改变补偿值；
3、 在保证单层双轴补偿膜和 TAC层补偿值 Rth范围的基础上， 同时 改变厚度 d和折射率 N 来改变补偿值。
从而可以改善现行单层双轴补偿膜补偿造成的近水平视角暗态漏光严 重现象， 增加近水平视角的对比度和清晰度， 同时减弱漏光并使漏光区域 集中在较小的视角范围内。
例如， 可以选取 LCAnd=352.1nm, 预倾角 =89度， 单层双轴补偿膜的 补偿值 Ro=66nm, Rth=220nm, TAC 层补偿值 Rth=82.6nm, 从而得到如 图 9所示的应用本发明 VA显示模式补偿架构改善后的暗态漏光分布示意 图， 图 9中漏光分布以亮度随视角的变化来表示， 图中 4个同心圓由内至 外分别表示垂直视角 20度， 40度, 60度, 及 80度； 80度同心圓外面标 注的数字表示水平视角的大小。
由图 9和图 2A对比， 可以直观的看到， 改善后单层双轴补偿膜补偿 暗态漏光集中在垂直视角附近， 漏光范围集中在较小的视角范围内， 且漏 光量明显低于现行单层补偿造成的暗态漏光。
本发明的 VA显示模式补偿架构及 VA显示模式液晶显示装置限制的 是补偿膜的补偿值范围， 而非针对特定补偿膜， 其它补偿膜的补偿值如果 在权利要求的限定范围内， 也应属于权利要求保护的范围。 综上所述， 本发明的 VA显示模式补偿架构能够使暗态漏光严重的视 角往垂直视角偏转， 增加近水平视角的对比度和清晰度， 可以通过合理的 搭配单层双轴补偿膜的补偿值和 TAC 层的补偿值来达到理想的暗态漏光 效果。 本发明的 VA显示模式液晶显示装置其暗态漏光严重的区域接近上 下垂直视角， 接近水平视角的暗态漏光明显降低， 有效的提高接近水平视 角的对比度和清晰度。
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 都应属于本发明后附的权利要求的保护范围。

Claims

权 利 要 求
1、 一种 VA显示模式补偿架构， 包括由上至下顺序配置的第一 TAC 层、 第一偏光层、 双轴补偿膜、 垂直配向液晶盒、 第二 TAC 层、 第二偏 光层及第三 TAC层， 以该垂直配向液晶盒也即 VA液晶显示器的水平视角 0度方向为基准， 该第一偏光层的吸收轴呈 0度设置， 该双轴补偿膜的慢 轴呈 90度设置， 该第二 TAC层的慢轴呈 0度设置， 该第二偏光层的吸收 轴呈 90度设置。
2、 如权利要求 1所述的 VA显示模式补偿架构， 其中， 所述第一偏光 层和第二偏光层为 PVA层。
3、 如权利要求 1所述的 VA显示模式补偿架构， 其中， 所述垂直配向 液晶盒的上下两侧分别设有 PSA层。
4、 如权利要求 1所述的 VA显示模式补偿架构， 其中， 所述垂直配向 液晶盒的相位延迟 LCAnd为 342.8 361.4nm
5、 如权利要求 1所述的 VA显示模式补偿架构， 其中， 所述垂直配向 液晶盒的预倾角范围为 [85,90 )度。
6、 如权利要求 1所述的 VA显示模式补偿架构， 其中， 所述双轴补偿 膜的面内延迟 Ro 为 54 78nm , 所述双轴补偿膜的厚度延迟 Rth 为 180 260
7、 如权利要求 1所述的 VA显示模式补偿架构， 其中， 所述垂直配向 液晶盒为多区域垂直配向液晶盒。
8、 如权利要求 7所述的 VA显示模式补偿架构， 其中， 所述垂直配向 液晶盒为四区域或八区域垂直配向液晶盒。
9、 一种 VA显示模式补偿架构， 包括由上至下顺序配置的第一 TAC 层、 第一偏光层、 双轴补偿膜、 垂直配向液晶盒、 第二 TAC 层、 第二偏 光层及第三 TAC层， 以该垂直配向液晶盒也即 VA液晶显示器的水平视角 0度方向为基准， 该第一偏光层的吸收轴呈 0度设置， 该双轴补偿膜的慢 轴呈 90度设置， 该第二 TAC层的慢轴呈 0度设置， 该第二偏光层的吸收 轴呈 90度设置；
其中， 所述第一偏光层和第二偏光层为 PVA层；
其中， 所述垂直配向液晶盒的上下两侧分别设有 PSA层；
其中 , 所述垂直配向液晶盒的相位延迟 LCAnd为 342.8 361.4nm; 其中， 所述垂直配向液晶盒的预倾角范围为 [85,90 )度； 其中， 所述双轴补偿膜的面内延迟 Ro为 54〜78nm, 所述双轴补偿膜 的厚度延迟 Rth为 180〜260 nm;
其中， 所述垂直配向液晶盒为多区域垂直配向液晶盒；
其中， 所述垂直配向液晶盒为四区域或八区域垂直配向液晶盒。
10、 一种 VA显示模式液晶显示装置， 包括由上至下顺序配置的第一 TAC层、 第一偏光层、 双轴补偿膜、 第一基板、 垂直配向液晶盒、 第二基 板、 第二 TAC层、 第二偏光层及第三 TAC层， 以该垂直配向液晶盒也即 该 VA显示模式液晶显示装置的水平视角 0度方向为基准， 该第一偏光层 的吸收轴呈 0度设置， 该双轴补偿膜的慢轴呈 90度设置， 该第二 TAC层 的慢轴呈 0度设置， 该第二偏光层的吸收轴呈 90度设置。
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