WO2019000943A1 - 染料偏光片的制备方法及显示面板 - Google Patents

染料偏光片的制备方法及显示面板 Download PDF

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WO2019000943A1
WO2019000943A1 PCT/CN2018/074690 CN2018074690W WO2019000943A1 WO 2019000943 A1 WO2019000943 A1 WO 2019000943A1 CN 2018074690 W CN2018074690 W CN 2018074690W WO 2019000943 A1 WO2019000943 A1 WO 2019000943A1
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Prior art keywords
dye
substrate
polarizing film
display panel
monomer
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PCT/CN2018/074690
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English (en)
French (fr)
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闫春秋
陈黎暄
陈珍霞
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深圳市华星光电技术有限公司
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Priority to US15/776,367 priority Critical patent/US11131877B2/en
Publication of WO2019000943A1 publication Critical patent/WO2019000943A1/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
    • G02F1/133528—Polarisers
    • 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
    • G02B5/305—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 including organic materials, e.g. polymeric layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal elements
    • 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
    • G02F1/133509—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
    • G02F2202/00—Materials and properties
    • G02F2202/04—Materials and properties dye

Definitions

  • the present application relates to the field of display panel technologies, and in particular, to a method for preparing a dye polarizer and a display panel.
  • the polarizer is a very important component in the liquid crystal panel, which largely determines the key characteristics of the liquid crystal panel, such as contrast, transmittance, brightness, thickness, and the like.
  • dye polarizers are an important class of polarizers.
  • the current dye polarizer has a narrow wavelength range of light absorption, resulting in low light utilization efficiency and low polarization.
  • the present application provides a method for preparing a dye polarizer and a display panel.
  • the method for preparing a dye polarizer comprises: dissolving a mixed dye and a reactive monomer in a solvent to obtain a polarizing film solution; wherein the mixed dye is prepared by mixing a plurality of dichroic dyes, the mixed dye For absorbing full-band visible light; after coating the polarizing film solution on the substrate and performing alignment, curing the reactive monomer on the substrate to form a dye polarizing film; repeating the above-mentioned formation n times a step of dyeing the polarizing film to produce a dye polarizer comprising n+1 layers of the dye polarizing film sequentially laminated; wherein n is a natural number greater than or equal to 2.
  • the mixed dye is composed of three kinds of dichroic dyes of red, orange and cyan.
  • the solvent comprises dichloromethane or acetone.
  • the alignment is specifically linear.
  • the polarized light is optically aligned.
  • the curing is specifically by heating
  • the reactive monomer is used to cure the reactive monomer.
  • the curing is specifically by ultraviolet
  • the reactive monomer is irradiated with light to cure the reactive monomer.
  • the substrate is a substrate in a display panel or a functional film layer in the display panel.
  • a display panel comprising a dye polarizer, which is produced by the above-described preparation method.
  • the display panel is a liquid crystal panel, a quantum dot panel, or an organic light emitting panel.
  • the display panel is a liquid crystal panel, and the liquid crystal panel includes a thin film transistor substrate and a color filter substrate, and a liquid crystal layer filled between the thin film transistor substrate and the color filter substrate;
  • the dye polarizer is disposed between the transistor substrate and the liquid crystal layer, and between the color filter substrate and the liquid crystal layer.
  • the solution of the present application can absorb the visible light of the whole wavelength band by using the mixed dye prepared by mixing a plurality of dichroic dyes, broadening the wavelength range of light absorbed by the conventional dye polarizer, and improving the light. Utilization efficiency; the degree of polarization of the dye polarizer is increased by sequentially laminating a plurality of dye polarizing films to prepare the dye polarizer.
  • FIG. 1 is a schematic flow chart of a preparation method of an embodiment of the present application.
  • FIG. 2 is a cross-sectional structural view of a display panel according to an embodiment of the present application.
  • the method 100 for preparing a coating type dye polarizing assembly includes:
  • the step of forming the dye polarizing film described above is repeated n times to obtain a dye polarizer comprising n+1 layers of the dye polarizing film sequentially laminated; wherein n is a natural number greater than or equal to 2.
  • both the mixed dye and the reactive monomer may be in the form of a powder, and both are sufficiently dissolved in a solvent to cause a polymerization reaction to obtain the polarizing film solution.
  • the mixed dye may comprise a plurality of dichroic dyes mixed together, and the plurality of dichroic dyes are uniformly mixed and ground to form the mixed dye.
  • the mixed dye is capable of absorbing visible light in the full band, that is, the stray light that the mixed dye can absorb has a wide wavelength range and can cover the wavelength of all visible light.
  • the mixed dye of nearly black may be mixed by three dichroic dyes of red, orange, and cyan, and visible light absorption in the wavelength range of 400 to 700 nm can be achieved.
  • the mixed dye may also be made of a mixture of other kinds of dichroic dyes, and the color of the mixed dye is not limited to being near black.
  • the single dichroic dye in the mixed dye may also be a mixture of several monochromatic dyes.
  • the solvent may be a liquid dispersion system such as dichloromethane or acetone, or other molten dispersion systems may be used as needed.
  • the reactive monomer may be a thermally reactive monomer or a photoreactive monomer.
  • the polarizing film solution prepared in S110 is coated on the substrate and aligned.
  • the polarizing film solution may be uniformly coated by a spin coating method: the substrate is placed on a turntable of a spin coating apparatus, and the rotation speed and the rotation duration of the turntable are set, and the substrate will rotate with the turntable. The polarizing film solution is then dropped over the substrate. The dripped film of the polarizing film is uniformly coated on the substrate during the rotation due to the centrifugal force of the rotation.
  • the rotation speed may be set to 500-2000 rpm, and the rotation duration may be 10-120 seconds.
  • the setting of the rotation parameter can not only uniformly coat the polarizing film solution under a reasonable centrifugal force, but also prevent the dye in the polarizing film solution from agglomerating due to excessive centrifugal force.
  • the rotational speed and the rotational duration can be flexibly set according to actual needs, and are not limited to the above listed.
  • the substrate may be a substrate in a display panel, and the substrate may be made of glass, PC (polycarbonate), PET (polyethylene terephthalate), TAC (triacetate), Made of FRP (fiber reinforced polymer) and other materials.
  • the substrate may also be a functional film layer in the display panel.
  • the functional film layer is a film layer having a specific function formed on the substrate through a certain film forming process.
  • the performing the alignment means aligning the mixed dye molecules on the substrate such that the dye polarizer finally obtained has polarization characteristics.
  • the alignment may specifically be optical alignment using linearly polarized light, i.e., illuminating the substrate with a linearly polarized light source to orient the mixed dye molecules on the substrate.
  • a polarizing alignment film may be formed in advance on the substrate, and the polarizing film solution may be coated on the polarizing alignment film to be aligned by the polarizing alignment film.
  • other alignment methods can also be used.
  • the reactive monomer on the substrate is cured to form a first layer of dye polarizing film.
  • the curing may specifically be: heating the reactive monomer to cure the reactive monomer; if the reactive monomer is a photoreactive monomer, The curing may specifically be an ultraviolet light irradiation of the reactive monomer to cure the reactive monomer.
  • the number of layers of the dye polarizing film in the dye polarizer can be determined as needed.
  • the preparation method 100 of the present embodiment can absorb the visible light of the whole wavelength band by using the mixed dye prepared by mixing a plurality of dichroic dyes, and broaden the wavelength range of the light absorbed by the conventional dye polarizer, thereby improving The utilization efficiency of light; by sequentially laminating a plurality of dye polarizing films to prepare the dye polarizer, the polarization degree of the dye polarizer is increased; and the polarizer is formed by using a dye having more stable physical and chemical properties as a raw material.
  • the coating method since the coating method is used, it can be flexibly formed on the outside or inside of the substrate.
  • the dye is polarized to prepare an external or built-in dye polarizer. When the dye polarizer is built in, it can replace a conventional PVA polarizer.
  • the embodiment of the present application further provides a display panel including the dye polarizer, and the dye polarizer can be prepared by the above preparation method.
  • the display panel includes, but is not limited to, a liquid crystal panel, a quantum dot panel, or an organic light emitting panel (OLED panel) or the like.
  • the display panel shown in FIG. 2 is the liquid crystal panel 10.
  • the liquid crystal panel 10 includes a thin film transistor substrate 17 and a color filter substrate 11, and a liquid crystal layer 14 filled between the thin film transistor substrate 17 and the color filter substrate 11.
  • a dye polarizer 16 is disposed between the thin film transistor substrate 17 and the liquid crystal layer 14, and a dye polarizer 12 is disposed between the color filter substrate 11 and the liquid crystal layer 14.
  • both the dye polarizer 16 and the dye polarizer 12 are built in the liquid crystal panel 10, which facilitates the thinning of the liquid crystal panel 10 and enhances the weather resistance of the dye polarizer.
  • FIG. 2 is only a schematic structure of a liquid crystal panel.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Polarising Elements (AREA)

Abstract

一种染料偏光片(12,16)的制备方法及显示面板。染料偏光片(12,16)的制备方法包括：将混合染料与反应单体放入溶剂中溶解，以得到偏光膜溶液；其中，混合染料由多种二色向性染料混合制成，混合染料用于吸收全波段的可见光；将偏光膜溶液涂布在基底上并进行配向后，对基底上的反应单体进行固化，形成染料偏光膜；重复n次形成染料偏光膜的步骤，以制得包括依次层叠的n+1层染料偏光膜的染料偏光片(12,16)；其中，n为大于或等于2的自然数。显示面板包括染料偏光片(12,16)，染料偏光片(12,16)采用染料偏光片(12,16)的制备方法制造。染料偏光片(12,16)的制备方法及显示面板拓宽了常规染料偏光片所能吸收光的波长范围，提升了光的利用效率，而且增加了染料偏光片(12,16)的偏振度。

Description

染料偏光片的制备方法及显示面板
本申请要求于2017年06月30日提交中国专利局、申请号为2017105300792、申请名称为“染料偏光片的制备方法及显示面板”的中国专利申请的优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本申请涉及显示面板技术领域，尤其涉及一种染料偏光片的制备方法及显示面板。
背景技术
偏光片是液晶面板中非常重要的部件，其很大程度上决定了液晶面板的关键特性指标，例如对比度、穿透率、亮度，厚度等。其中，染料偏光片是一类重要的偏光片。目前的染料偏光片，其吸收的光的波长范围较窄，导致光利用效率低，偏振度也较低。
申请内容
有鉴于此，本申请提供了一种染料偏光片的制备方法及显示面板。
染料偏光片的制备方法，包括：将混合染料与反应单体放入溶剂中溶解，以得到偏光膜溶液；其中，所述混合染料由多种二色向性染料混合制成，所述混合染料用于吸收全波段的可见光；将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜；重复n次上述形成所述染料偏光膜的步骤，以制得包括依次层叠的n+1层所述染料偏光膜的染料偏光片；其中，n为大于或等于2的自然数。
其中，所述混合染料由红、橙、青三种二色向性染料混合而成。
其中，所述溶剂包括二氯甲烷或丙酮。
其中，在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述配向具体为使用线性偏振光进行光配向。
其中，在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述固化具体为通过加热所述反应单体以使所述反应单体固化。
其中，在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述固化具体为通过紫外光照射所述反应单体以使所述反应单体固化。
其中，所述基底为显示面板中的基板，或显示面板中的功能膜层。
一种显示面板，包括染料偏光片，所述染料偏光片采用上述的制备方法制造。
其中，所述显示面板为液晶面板、量子点面板，或有机发光面板。
其中，所述显示面板为液晶面板，所述液晶面板包括薄膜晶体管基板与彩色滤光片基板，以及填充于所述薄膜晶体管基板与所述彩色滤光片基板之间的液晶层；所述薄膜晶体管基板与所述液晶层之间，以及所述彩色滤光片基板与所述液晶层之间均设有所述染料偏光片。
本申请的方案，由于采用了由多种二色向性染料混合制成的所述混合染料，能够吸收全波段的可见光，拓宽了常规染料偏光片所能吸收光的波长范围，提升了光的利用效率；通过依次层叠多层染料偏光膜以制备所述染料偏光片，增加了染料偏光片的偏振度。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例的制备方法的示意性流程框图；
图2是本申请实施例的显示面板的剖面结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清 楚、完整地描述。显然，所描述的实施例是本申请的一部分实施例，而不是全部实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都应属于本申请保护的范围。
如图1所示，本申请实施例的涂布型染料偏光组件的制备方法100包括：
S110，将混合染料与反应单体放入溶剂中溶解，以得到偏光膜溶液；其中，所述混合染料由多种二色向性染料混合制成，所述混合染料用于吸收全波段的可见光；
S120，将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜；
S130，重复n次上述形成所述染料偏光膜的步骤，以制得包括依次层叠的n+1层所述染料偏光膜的染料偏光片；其中，n为大于或等于2的自然数。
具体的，在S110中，混合染料与反应单体均可以呈粉末状，两者充分溶解在溶剂中并发生聚合反应，以得到所述偏光膜溶液。其中，所述混合染料可包括混合在一起的多种二色向性染料，多种二色向性染料经过均匀混合与研磨处理后，形成所述混合染料。所述混合染料能够吸收全波段的可见光即指，所述混合染料所能吸收的杂散光线的波长范围较广，能够覆盖全部可见光的波长。例如，可由红、橙、青三种二色向性染料混合形成接近黑色的所述混合染料，能够实现在400-700nm波长范围的可见光吸收。当然，所述混合染料还可以由其他种类的二色向性染料混合制成，所述混合染料的颜色不限于为近黑色。另外，所述混合染料中的单种二色向性染料也可以是若干单色染料的混合物。所述溶剂可以是二氯甲烷或丙酮等液态分散体系，也可以根据需要选用其他熔融态分散体系。所述反应单体可以是热反应单体，也可以是光反应单体。
在S120中，将S110中制备的所述偏光膜溶液涂布在所述基底上，并进行配向。具体的，可以采用旋涂法均匀涂布所述偏光膜溶液：将所述基底放置在旋涂设备的转盘上，设置转盘的转速与旋转时长，基底将随转盘转动。然后在所述基底之上滴入所述偏光膜溶液。滴入的所述偏光膜溶液在转动过程中，由于转动离心力的作用，将被均匀涂覆在所述基底上。本实施例中，优选的，所述转速可以设为500-2000转每秒，旋转时长可以为10-120秒。此种转动参数的设置，既能够使得所述偏光膜溶液在合理的离心力作用下均匀涂覆，又能够 避免所述偏光膜溶液中的染料在由于离心力过大而发生凝聚。在其他实施例中，转速与旋转时长可以根据实际需要予以灵活设定，而不限于为上述所列。
在S120中，所述基底可以是显示面板中的基板，所述基板可以是由玻璃、PC(聚碳酸酯)、PET(聚对苯二甲酸乙二醇酯)、TAC(三醋酸纤维)、FRP(纤维增强聚合物)等材料制成。所述基底也可以是显示面板中的某个功能膜层。所述功能膜层为经过某成膜制程，在所述基板上形成的具有特定功能的膜层。
在S120中，所述进行配向是指，使所述基底上的混合染料分子定向排列，以使最终制得的所述染料偏光片具有偏振特性。例如，所述配向具体可以是使用线性偏振光进行光配向，即使用线性偏振光源照射所述基底，使所述基底上的混合染料分子定向排列。或者，还可以在所述基底上预先形成一层偏光配向膜，在所述偏光配向膜之上涂布所述偏光膜溶液，通过所述偏光配向膜进行配向。当然，还可以采用其他配向方式。
在S120中，对所述基底上的所述反应单体进行固化，以形成第一层染料偏光膜。具体的，若所述反应单体为热反应单体，所述固化具体可以是对所述反应单体进行加热以使所述反应单体固化；若所述反应单体为光反应单体，所述固化具体可以是对所述反应单体进行紫外光照射以使所述反应单体固化。
在S130中，可以重复进行n次上述形成所述染料偏光膜的步骤，最终形成包括依次层叠的n+1层所述染料偏光膜的所述染料偏光片。即第一层所述染料偏光膜形成在所述基底上，第二层述染料偏光膜形成在第一层染料偏光膜之上，依次类推。例如，n＝2，则最终形成包括3层依次层叠的所述染料偏光膜的所述染料偏光片。优选的，n＝2～4，即所述染料偏光片包括3～5层所述染料偏光膜，此种所述染料偏光片由于具有多个膜层，偏振度得到提升，而透过率不至于降低太多。在其他实施例中，可以根据需要确定所述染料偏光片中所述染料偏光膜的层数。
本实施例的制备方法100，由于采用了由多种二色向性染料混合制成的所述混合染料，能够吸收全波段的可见光，拓宽了常规染料偏光片所能吸收光的波长范围，提升了光的利用效率；通过依次层叠多层染料偏光膜以制备所述染料偏光片，增加了染料偏光片的偏振度；由于使用了物理与化学性质更为稳定 的染料作为原料，形成的偏光片无需如常规的PVA(聚乙烯醇)偏光片那样包括TAC层及其他保护层，因而有利于显示面板的轻薄化；另外，由于使用了涂布方式，可以灵活的在所述基板外侧或内侧形成所述染料偏光膜，从而制备外置或内置的所述染料偏光片。当所述染料偏光片内置时，可取代常规PVA偏光片。
本申请实施例还提供了一种包括所述染料偏光片的显示面板，所述染料偏光片可采用上述制备方法制备。所述显示面板包括但不限于为液晶面板、量子点面板，或有机发光面板(OLED面板)等。
例如，图2示出的所述显示面板为液晶面板10。如图2所示，液晶面板10包括薄膜晶体管基板17与彩色滤光片基板11，以及填充于薄膜晶体管基板17与彩色滤光片基板11之间的液晶层14。薄膜晶体管基板17与液晶层14之间设有染料偏光片16，彩色滤光片基板11与液晶层14之间设有染料偏光片12。本实施例中，染料偏光片16与染料偏光片12均内置在液晶面板10之内，此有利于液晶面板10的薄型化，并增强了染料偏光片的耐候性。
如图2所示，彩色滤光片基板11上可以设置彩色滤光单元、黑矩阵(BM)及配向层13。薄膜晶体管基板17上可以设置TFT(薄膜晶体管)及配向层15。应理解，图2所示仅为液晶面板的示意性结构。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易的想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (15)

  1. 一种染料偏光片的制备方法，其中，包括：
    将混合染料与反应单体放入溶剂中溶解，以得到偏光膜溶液；其中，所述混合染料由多种二色向性染料混合制成，所述混合染料用于吸收全波段的可见光；
    将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜；
    重复n次上述形成所述染料偏光膜的步骤，以制得包括依次层叠的n+1层所述染料偏光膜的染料偏光片；其中，n为大于或等于2的自然数。
  2. 根据权利要求1所述的制备方法，其中，
    所述混合染料由红、橙、青三种二色向性染料混合而成。
  3. 根据权利要求1所述的制备方法，其中，
    所述溶剂包括二氯甲烷或丙酮。
  4. 根据权利要求2所述的制备方法，其中，
    所述溶剂包括二氯甲烷或丙酮。
  5. 根据权利要求1所述的制备方法，其中，
    在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述配向具体为使用线性偏振光进行光配向。
  6. 根据权利要求2所述的制备方法，其中，
    在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述配向具体为使用线性偏振光进行光配向。
  7. 根据权利要求1所述的制备方法，其中，
    在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述固化具体为对所述反应单体进行加热以使所述反应单体固化。
  8. 根据权利要求2所述的制备方法，其中，
    在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述固化具体为对所述反应单体进行加热以使所述反应单体固化。
  9. 根据权利要求1所述的制备方法，其中，
    在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述固化具体为对所述反应单体进行紫外光照射以使所述反应单体固化。
  10. 根据权利要求2所述的制备方法，其中，
    在所述将所述偏光膜溶液涂布在基底上并进行配向后，对所述基底上的所述反应单体进行固化，形成染料偏光膜的步骤中，所述固化具体为对所述反应单体进行紫外光照射以使所述反应单体固化。
  11. 根据权利要求1所述的制备方法，其中，
    所述基底为显示面板中的基板，或显示面板中的功能膜层。
  12. 根据权利要求2所述的制备方法，其中，
    所述基底为显示面板中的基板，或显示面板中的功能膜层。
  13. 一种显示面板，包括染料偏光片，其中，
    所述染料偏光片采用权利要求1所述的制备方法制造。
  14. 根据权利要求13所述的显示面板，其中，
    所述显示面板为液晶面板、量子点面板，或有机发光面板。
  15. 根据权利要求13所述的显示面板，其中，
    所述显示面板为液晶面板，所述液晶面板包括薄膜晶体管基板与彩色滤光片基板，以及填充于所述薄膜晶体管基板与所述彩色滤光片基板之间的液晶层；所述薄膜晶体管基板与所述液晶层之间，以及所述彩色滤光片基板与所述液晶层之间均设有所述染料偏光片。
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