WO2014146396A1 - 一种液晶面板及液晶显示装置 - Google Patents

一种液晶面板及液晶显示装置 Download PDF

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Publication number
WO2014146396A1
WO2014146396A1 PCT/CN2013/082065 CN2013082065W WO2014146396A1 WO 2014146396 A1 WO2014146396 A1 WO 2014146396A1 CN 2013082065 W CN2013082065 W CN 2013082065W WO 2014146396 A1 WO2014146396 A1 WO 2014146396A1
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Prior art keywords
liquid crystal
film
crystal panel
compensation film
phase retardation
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PCT/CN2013/082065
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English (en)
French (fr)
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金姬
朴求铉
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合肥京东方光电科技有限公司
京东方科技集团股份有限公司
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Priority to US14/362,014 priority Critical patent/US9740049B2/en
Publication of WO2014146396A1 publication Critical patent/WO2014146396A1/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
    • G02F1/1335—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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • 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
    • G02F1/133634—Birefringent elements, e.g. for optical compensation the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis
    • 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
    • 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
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133565—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements inside the LC elements, i.e. between the cell substrates
    • 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
    • G02F1/133631—Birefringent elements, e.g. for optical compensation with a spatial distribution of the retardation value
    • 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
    • G02F2413/01—Number of plates being 1

Definitions

  • Liquid crystal panel and liquid crystal display device Liquid crystal panel and liquid crystal display device
  • Embodiments of the present invention relate to the field of liquid crystal display technology, and in particular, to a liquid crystal panel and a liquid crystal display device. Background technique
  • LCD Liquid Crystal Display
  • a conventional liquid crystal display comprising an upper polarizer 1, an upper glass substrate 2, a color filter 3, a protective film layer 4, a liquid crystal layer 5, a lower polarizer 6 and a lower glass substrate 8 is shown in Fig. 1.
  • the upper polarizer 1 comprises an upper polarizer outer cellulose triacetate (TAC) film 10, an upper polarizer polarizing film 11 and an upper polarizer intracellular cellulose triacetate (TAC) film 12, and the lower polarizer 6 includes a lower polarizer sheet 3
  • a cellulose acetate (TAC) film 60, a lower polarizer polarizing film 61, and a lower polarizer film of cellulose triacetate (TAC) 62, and a color filter 3 are provided with a black matrix 31.
  • Embodiments of the present invention provide a liquid crystal panel including a color filter and a liquid crystal layer, and an optical compensation film layer is disposed between the color filter and the liquid crystal layer.
  • the optical compensation film layer includes a C plate compensation film and an A plate compensation film, and the optical compensation film layer is coated on a lower surface of the color filter, and the C plate compensation film is located at the Between the color filter and the A-plate compensation film.
  • the vertical phase retardation Rth of the C-plate compensation film ranges from: 100 nm ⁇ Rth ⁇ 150 nm;
  • the horizontal phase retardation Re of the A-plate compensation film is in the range of 200 nm ⁇ Re ⁇ 300 nm.
  • the vertical phase retardation Rth of the C-plate compensation film is 138 nm; and the horizontal phase retardation Re of the A-plate compensation film is 274 nm.
  • the liquid crystal panel further includes an upper polarizer and a lower polarizer; the upper polarizer comprises an upper polarizer polarizing film and an upper polarizer in a cellulose triacetate (TAC) film, and the TAC film in the upper polarizer is located at the Between the polarizing film polarizing film and the color filter, the vertical phase retardation Rth of the TAC film in the upper polarizer ranges from 0 to 10 nm, and the horizontal phase retardation Re of the TAC film in the upper polarizer is Onm.
  • TAC cellulose triacetate
  • the lower polarizer comprises a lower polarizer polarizing film and a lower polarizer intracellular cellulose triacetate (TAC) film, and the lower polarizer inner TAC film is located between the lower polarizer polarizing film and the liquid crystal layer.
  • TAC intracellular cellulose triacetate
  • the vertical phase retardation Rth of the TAC film in the lower polarizer ranges from 0 to 10 nm, and the horizontal phase retardation Re of the TAC film in the lower polarizer is Onm.
  • the vertical phase retardation Rth of the TAC film in the upper polarizer is Onm; and the vertical phase retardation Rth of the TAC film in the lower polarizer is Onm.
  • the liquid crystal layer has a phase retardation ⁇ nd ranging from 320 to 420 nm.
  • the liquid crystal layer has a phase retardation ⁇ ⁇ of 392.7 nm.
  • Embodiments of the present invention also provide a liquid crystal display device including the above liquid crystal panel.
  • FIG. 1 is a schematic structural view of a conventional liquid crystal display
  • FIG. 2 is a schematic structural diagram of a liquid crystal panel according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a color shift simulation effect of a conventional liquid crystal display
  • FIG. 4 is a schematic diagram of a color shift simulation effect of a liquid crystal panel according to an embodiment of the present invention.
  • the embodiment provides a liquid crystal panel including an upper polarizer 1, an upper glass substrate 2, a color filter 3, a liquid crystal layer 5, a lower polarizer 6 and a lower glass substrate 8, and a liquid crystal.
  • a thin film transistor driving wiring layer 9 is provided between the layer 5 and the lower glass substrate 8, and an optical compensation film layer 7 is provided between the color filter 3 and the liquid crystal layer 5.
  • the optical compensation film layer 7 functions to improve the color shift by theoretically calculating the optimum phase difference. As shown in FIG. 3 and FIG.
  • the optical compensation film layer 7 described above may be disposed outside the protective film layer 4 under the color filter 3, or may directly replace the protective film layer 4.
  • an optical compensation film layer 7 disposed on the lower surface of the color filter 3 can be used to replace the original protective film layer and function as a protective film layer.
  • the optical compensation film layer 7 is disposed in a casing of a liquid crystal panel, that is, an In-Cell structure.
  • the optical compensation film layer 7 includes a C plate compensation film 71 and an A plate compensation film 72, and the optical compensation film layer 7 is coated on the lower surface of the color filter 3;
  • the C plate compensation film 71 is located between the color filter 3 and the A plate compensation film 72.
  • the optimal phase difference of the optical compensation film layer can be obtained as follows:
  • the vertical phase retardation Rth of the C-plate compensation film is: 100 nm ⁇ Rth ⁇ 150 nm;
  • the horizontal phase retardation Re of the A-plate compensation film is: 200 nm ⁇ Re ⁇ 300 nm.
  • the Matlab program can be used for calculation, and the theory used in the calculation is applied to Berreman's 4 x 4 optical formula.
  • the vertical phase retardation Rth of the C-plate compensation film is 138 nm and the horizontal phase retardation Re of the A-plate compensation film is 274 nm, the liquid crystal display is optimal.
  • the upper polarizer 1 includes an upper polarizer TAC film 10, an upper polarizer polarizing film 11 and an upper polarizer TAC film 12, and the upper polarizer TAC film 12 is located on the upper polarizer polarized film.
  • the vertical phase retardation Rth of the TAC film 12 in the upper polarizer ranges from 0 to 10 nm, and the horizontal phase retard Re of the TAC film 12 in the upper polarizer is 0 nm.
  • the lower polarizer 6 includes a lower polarizer off-the-earth TAC film 60, a lower polarizer polarizing film 61, and a lower polarizer in-line TAC film 62, and a lower polarizer in-wafer film T62 is located on the lower polarizer polarizing film 61 and the liquid crystal Between the layers 5, the vertical phase retardation Rth of the TAC film 62 in the lower polarizer ranges from 0 to 10 nm, and the horizontal phase retard Re of the TAC film 62 in the lower polarizer is 0 nm.
  • the liquid crystal panel can improve the display contrast, preferably eliminate the color shift in the diagonal direction of the liquid crystal panel, and optimally display effect.
  • the liquid crystal layer includes a liquid crystal layer having a phase retardation ⁇ ⁇ ⁇ in the range of 320 to 420 nm.
  • the phase retardation ⁇ ⁇ ⁇ of the liquid crystal layer is 392.7 nm, the liquid crystal panel has the best display effect.
  • a liquid crystal display device including the liquid crystal panel as described above is also provided. Since the optical compensation film layer is included in the liquid crystal panel, the liquid crystal display device has a better display effect, improves display contrast in the full viewing angle direction, and has a function of improving the color shift of the ADS liquid crystal in the diagonal direction.
  • An object of an embodiment of the present invention is to provide an In-Cell (inside a glass substrate) technology
  • the liquid crystal panel and the liquid crystal display device with the optical compensation film layer can solve the problem of color shift in the diagonal direction of the liquid crystal panel.
  • the present invention has the following advantages:
  • the embodiment of the present invention can improve the contrast in the direction of the full viewing angle by adopting the structure of the optical compensation film layer inside the liquid crystal panel, and has the function of improving the color shift of the liquid crystal panel in the diagonal direction;
  • Embodiments of the present invention can make the liquid crystal panel compact in structure, reduce production cost, and reduce light reflection and refraction by coating an optical compensation film layer on the lower surface of the color filter of the liquid crystal panel. Leakage and mura (refer to the phenomenon that the brightness of the display is uneven, causing various traces); 3.
  • the optical compensation film layer used in the embodiment of the present invention can also improve the gray scale of the LCD, CR

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

一种液晶面板及液晶显示装置，所述液晶面板包括彩色滤光片和液晶层，所述彩色滤光片（3）和液晶层（5）之间设有光学补偿膜层（7）。通过在液晶面板内部采用光学补偿膜层（7），在全视角方向能够提高对比度，并改善液晶面板对角方向色偏；而且，在液晶面板的彩色滤光片（3）上涂覆光学补偿膜层（7），能够使该液晶面板结构紧凑，减小生产成本，减小由于光反射和折射造成的漏光和不均匀；还可改善LCD的灰度、对比度和色相等。

Description

一种液晶面板及液晶显示装置 技术领域
本发明的实施例涉及液晶显示技术领域， 尤其涉及一种液晶面板及液晶 显示装置。 背景技术
随着 LCD ( Liquid Crystal Display, 液晶显示器）显示技术的不断发展， 人们对于 LCD质量的要求也在不断地提高。 可视角度达到广视角面板的程 度的液晶面板越来越多的得到人们的青睐。
现有技术中，使用 ADS型或 IPS型技术的液晶面板对角方向均存在着色 偏的问题。 图 1中示出了现有液晶显示器， 包括上偏光片 1、 上玻璃基板 2、 彩色滤光片 3、 保护膜层 4、 液晶层 5、 下偏光片 6和下玻璃基板 8。 上偏光 片 1 包括上偏光片外三醋酸纤维素（TAC )薄膜 10、 上偏光片偏光薄膜 11 和上偏光片内三醋酸纤维素（TAC )薄膜 12, 下偏光片 6包括下偏光片外三 醋酸纤维素 （TAC )薄膜 60、 下偏光片偏光薄膜 61和下偏光片内三醋酸纤 维素（TAC )薄膜 62, 彩色滤光片 3上设有黑色矩阵 31。 目前为了解决液 晶面板色偏的问题， 较多在上玻璃基板外侧使用补偿膜的结构， 但该设计容 易因光反射和折射造成漏光和亮度不均等技术问题。
为了解决以上问题， 本发明做了有益改进。 发明内容
(一）要解决的技术问题
本发明的实施例提供一种液晶面板， 该液晶面板包括彩色滤光片和液晶 层， 所述彩色滤光片和液晶层之间设有光学补偿膜层。
其中， 所述光学补偿膜层包括一 C板补偿膜和一 A板补偿膜，且该光学 补偿膜层涂覆在所述彩色滤光片的下表面上， 所述 C板补偿膜位于所述彩色 滤色片和所述 A板补偿膜之间。
此外，所述 C板补偿膜的垂直相位延迟 Rth范围为： 100nm<Rth<150nm; 所述 A板补偿膜的水平相位延迟 Re范围为： 200nm<Re<300nm。
例如， 所述 C板补偿膜的垂直相位延迟 Rth为 138nm; 所述 A板补偿膜 的水平相位延迟 Re为 274nm。
其中， 该液晶面板还包括上偏光片和下偏光片； 所述上偏光片包括上偏 光片偏光薄膜和上偏光片内三醋酸纤维素（ TAC )薄膜，所述上偏光片内 TAC 薄膜位于所述上偏光片偏光薄膜和所述彩色滤色片之间， 所述上偏光片内 TAC薄膜的垂直相位延迟 Rth范围为 0~10nm,所述上偏光片内 TAC薄膜的 水平相位延迟 Re为 Onm; 所述下偏光片包括下偏光片偏光薄膜和下偏光片 内三醋酸纤维素 （TAC )薄膜， 所述下偏光片内 TAC 薄膜位于所述下偏光 片偏光薄膜和所述液晶层之间， 所述下偏光片内 TAC 薄膜的垂直相位延迟 Rth范围为 0~10nm, 所述下偏光片内 TAC薄膜的水平相位延迟 Re为 Onm。
例如，所述上偏光片内 TAC薄膜的垂直相位延迟 Rth为 Onm;所述下偏 光片内 TAC薄膜的垂直相位延迟 Rth为 Onm。
例如， 所述液晶层的相位延迟 Δ nd范围是 320~420nm。
此外， 所述液晶层的相位延迟 Δι ΐ为 392.7nm。
本发明的实施例还提供一种液晶显示装置， 该液晶显示装置包括上述的 液晶面板。 附图说明
图 1是现有液晶显示器结构示意图；
图 2是本发明实施例提供的液晶面板的结构示意图；
图 3是现有液晶显示器的色偏仿真效果示意图；
图 4是本发明实施例提供的液晶面板的色偏仿真效果示意图。
附图中， 各标号所代表的组件列表如下：
1、 上偏光片； 10、 上偏光片外 TAC薄膜； 11、 上偏光片偏光薄膜； 12、 上偏光片内 （TAC )薄膜； 2、 上玻璃基板； 3、 彩色滤光片； 31、 黑色矩阵； 4、 保护膜层； 5、 液晶层； 6、 下偏光片； 60、 下偏光片外 TAC薄膜； 61、 下偏光片偏光薄膜； 62、 下偏光片内 TAC薄膜； 7、 光学补偿膜层； 71、 C板补偿膜； 72、 A板补偿膜； 8、 下玻璃基板； 9、 薄膜晶体管驱动线路层。 具体实施方式
下面结合附图详细说明本发明的实施方式。
如图 2所示， 本实施例提供一种液晶面板， 该液晶面板包括上偏光片 1、 上玻璃基板 2、 彩色滤光片 3、 液晶层 5、 下偏光片 6和下玻璃基板 8, 液晶 层 5和下玻璃基板 8之间设有薄膜晶体管驱动线路层 9, 在彩色滤光片 3和 液晶层 5之间设有光学补偿膜层 7。 该光学补偿膜层 7通过理论计算最佳相 位差进而起到改善色偏的作用。 如图 3和图 4所示， 在没有设置光学补偿膜 层的液晶面板中， 存在较大色偏问题； 而在本实施例中提供的液晶面板中， 无论是 ADS ( Advanced Super Dimension Switch , 高级超维场转换技术）型 或 IPS ( In-Plane Switching, 平面转换）型液晶面板， 其色偏问题都能被较好 地解决。
上述的光学补偿膜层 7可设置在彩色滤光片 3下的保护膜层 4外， 也可 直接代替该保护膜层 4。 例如， 本实施例可以采用一种设置在彩色滤光片 3 的下表面上的光学补偿膜层 7, 用以替换原有的保护膜层并可起到保护膜层 的作用。 该光学补偿膜层 7设置在液晶面板的盒内， 即 In-Cell结构。 如图 2 所示， 该光学补偿膜层 7包括一 C板补偿膜 71和一 A板补偿膜 72, 且该光 学补偿膜层 7涂覆在所述彩色滤光片 3的下表面上； 所述 C板补偿膜 71位 于所述彩色滤色片 3 和所述 A板补偿膜 72之间。 本实施例通过以下的 Berreman的 4x4 光学公式理论来计算合适的相位差：
· 对于截止电波的切线成分的关系式用 分方程式表现为：
^- = -ik0A(z)^
dz
= (Εχ , Ηγ , Εγ , -Ηχ ) , k0 =―
c
Δ： 表现 2轴性（ biaxial )介质的传播特性的 4 x 4矩阵
• 利用传达矩阵表现介质的特性：
Figure imgf000005_0001
p(h) = exp(i 0 ) = β0 + + β2Α2 + β3Α3 ρ：对于 2轴性介质的 4 X 4传达矩阵
介质的厚度
β, ,β, ,β,, β, : 用 Δ的固有值（ eigen value )来表现 • Δ的固有值一共有 4个
进行成分 ( transmitted waves ) -2个 2 x 2矩阵方式
反射成分（ reflected waves ) -2个 2 χ 2矩阵方式
通过上述公式计算， 可得出光学补偿膜层的最佳位相差为：
所述 C板补偿膜的垂直相位延迟 Rth范围为 :100nm<Rth<150nm;
所述 A板补偿膜的水平相位延迟 Re范围为 :200nm<Re<300nm。
其中， 为了找出本实施例中提出的解决色偏的最佳值， 可利用 Matlab program计算， 计算时使用的理论适用了 Berreman的 4 x 4光学公式。 当所 述 C板补偿膜的垂直相位延迟 Rth为 138nm, A板补偿膜的水平相位延迟 Re为 274nm时， 液晶显示的效果最佳。
在该液晶面板中， 上偏光片 1包括上偏光片外 TAC薄膜 10、 上偏光片 偏光薄膜 11和上偏光片内 TAC薄膜 12,所述上偏光片内 TAC薄膜 12位于 所述上偏光片偏光薄膜 11和所述彩色滤色片 3之间， 所述上偏光片内 TAC 薄膜 12的垂直相位延迟 Rth范围为 0~10nm, 所述上偏光片内 TAC薄膜 12 的水平相位延迟 Re为 0nm。
所述下偏光片 6包括下偏光片外 TAC薄膜 60、下偏光片偏光薄膜 61和 下偏光片内 TAC薄膜 62, 下偏光片内 TAC薄膜 62位于所述下偏光片偏光 薄膜 61和所述液晶层 5之间， 所述下偏光片内 TAC薄膜 62的垂直相位延 迟 Rth范围为 0~10nm, 所述下偏光片内 TAC薄膜 62的水平相位延迟 Re为 0nm。其中，当上、下偏光片内 TAC薄膜 12和 62的垂直相位延迟 Rth为 Onm 时，该液晶面板能够提高显示对比度，较佳消除液晶面板的对角方向的色偏， 起到最佳的显示效果。
本实施例中， 液晶面板所包含的液晶层相位延迟 Δ ι ΐ 的范围是 320~420nm, 其中， 该液晶层的相位延迟 Δ ι ΐ为 392.7nm时， 该液晶面板的 显示效果最佳。
本实施例中， 还提供一种液晶显示装置， 其包括如上述的液晶面板。 由 于液晶面板中包括了光学补偿膜层， 从而该液晶显示装置具有较好的显示效 果， 在全视角方向提高了显示对比度， 并具有改善 ADS 液晶对角方向色偏 的功能。
本发明实施例的目的是提供一种采用 In-Cell (在玻璃基板内侧）技术设 置光学补偿膜层的液晶面板及液晶显示装置， 可解决液晶面板对角方向的色 偏问题。
与现有技术和产品相比， 本发明有如下优点：
1、本发明的实施例通过在液晶面板内部采用光学补偿膜层的结构，在全 视角方向能够起到提高对比度的作用， 并具有改善液晶面板对角方向色偏的 功能；
2、本发明的实施例通过在液晶面板的彩色滤光片的下表面上涂覆光学补 偿膜层， 能够使该液晶面板结构紧凑， 减小生产成本， 并且可减小由于光反 射和折射造成的漏光和 mura (指显示器亮度不均匀，造成各种痕迹的现象 )； 3、 本发明的实施例采用的光学补偿膜层还可改善 LCD 的灰度、 CR
( Contrast Ratio-显示器对比度 )和色相。
以上实施方式仅用于说明本发明， 而并非对本发明的限制， 有关技术领 域的普通技术人员， 在不脱离本发明的精神和范围的情况下， 还可以做出各 种变化和变型， 因此所有等同的技术方案也属于本发明的范畴， 本发明的专 利保护范围应由权利要求限定。

Claims

权利要求书
1、 一种液晶面板， 包括彩色滤光片和液晶层， 其中， 所述彩色滤光片和 所述液晶层之间设有光学补偿膜层。
2、根据权利要求 1所述的液晶面板， 其中， 所述光学补偿膜层包括一 C 板补偿膜和一 A板补偿膜，且该光学补偿膜层涂覆在所述彩色滤光片的下表 面上， 所述 C板补偿膜位于所述彩色滤色片和所述 A板补偿膜之间。
3、 根据权利要求 2所述的液晶面板， 其中， 所述 C板补偿膜的垂直相 位延迟 Rth范围为： 100nm<Rth<150nm;
所述 A板补偿膜的水平相位延迟 Re范围为： 200nm<Re<300nm。
4、 根据权利要求 3所述的液晶面板， 其中， 所述 C板补偿膜的垂直相 位延迟 Rth为 138nm;
所述 A板补偿膜的水平相位延迟 Re为 274nm。
5、根据权利要求 4所述的液晶面板， 其中， 该液晶面板还包括上偏光片 和下偏光片；
所述上偏光片包括上偏光片偏光薄膜和上偏光片内三醋酸纤维素薄膜， 所述上偏光片内三醋酸纤维素薄膜位于所述上偏光片偏光薄膜和所述彩色滤 色片之间， 所述上偏光片内三醋酸纤维素薄膜的垂直相位延迟 Rth 范围为 0~10nm, 所述上偏光片内三醋酸纤维素薄膜的水平相位延迟 Re为 Onm; 所述下偏光片包括下偏光片偏光薄膜和下偏光片内三醋酸纤维素薄膜， 所述下偏光片内三醋酸纤维素薄膜位于所述下偏光片偏光薄膜和所述液晶层 之间， 所述下偏光片内三醋酸纤维素薄膜的垂直相位延迟 Rth 范围为 0~10nm, 所述下偏光片内三醋酸纤维素薄膜的水平相位延迟 Re为 Onm。
6、根据权利要求 5所述的液晶面板， 其中， 所述上偏光片内三醋酸纤维 素薄膜的垂直相位延迟 Rth为 Onm, 所述下偏光片内三醋酸纤维素薄膜的垂 直相位延迟 Rth为 Onm。
7、根据权利要求 6所述的液晶面板， 其中， 所述液晶层的相位延迟 Δι ΐ 范围是 320~420nm。
8、根据权利要求 7所述的液晶面板， 其中， 所述液晶层的相位延迟 Δι ΐ 为 392.7匪。 、 一种液晶显示装置， 其中， 包括如权利要求 1-8任一项所述的液晶面
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