WO2017041323A1 - 一种偏光片 - Google Patents

一种偏光片 Download PDF

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Publication number
WO2017041323A1
WO2017041323A1 PCT/CN2015/089966 CN2015089966W WO2017041323A1 WO 2017041323 A1 WO2017041323 A1 WO 2017041323A1 CN 2015089966 W CN2015089966 W CN 2015089966W WO 2017041323 A1 WO2017041323 A1 WO 2017041323A1
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Prior art keywords
quantum rod
polarizer
polarizing
treatment
polarizer according
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PCT/CN2015/089966
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English (en)
French (fr)
Inventor
程小平
李泳锐
陈孝贤
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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 US14/897,810 priority Critical patent/US10416492B2/en
Publication of WO2017041323A1 publication Critical patent/WO2017041323A1/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
    • G02F1/133533—Colour selective polarisers
    • 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
    • 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
    • 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
    • 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
    • G02B5/3058—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state comprising electrically conductive elements, e.g. wire grids, conductive particles
    • 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
    • G02F1/133528—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
    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a polarizer suitable for use in a display.
  • Quantum Dots are extremely small inorganic nanocrystals that are invisible to the naked eye. Whenever it is stimulated by light or electricity, the quantum dots emit colored light. The color of the light is determined by the material and size of the quantum dots. In general, if the particles of a quantum dot are small, long wavelengths are absorbed, and if the particles are large, short waves are absorbed. For example, a quantum dot of a specific size absorbs short-wave blue light and excites light that exhibits a long-wavelength light color. This feature allows quantum dots to change the color of the light emitted by the source.
  • Quantum dot display technology has been fully upgraded in various dimensions such as color gamut coverage, color control accuracy, and red, green, and blue color purity. It is regarded as the commanding height of global display technology and is also seen as a global display technology revolution. Through the quantum dot display technology, the full color gamut display has been revolutionized, and the image color is most truly restored.
  • the quantum rods are semiconductor nanocrystals having a cross-sectional radius of less than 20 nm and a length of about several tens of nanometers, and most of the quantum rods include materials composed of Group II-VI or Group III-V elements. Due to the quantum confinement effect, the transport of electrons and holes inside is limited, so that the continuous band structure becomes a separate energy level structure. When the size of the quantum rods is different, the quantum confinement of electrons and holes is different, and the structure of the separated energy levels is also different. After being excited by external energy, different sizes of quantum rods emit light of different wavelengths - also It is the light of various colors.
  • the advantage of the quantum rod is that the size of the quantum rod can be controlled.
  • the wavelength range of the illumination can be covered to the infrared and the entire visible light band, and the emission band is narrow, and the color saturation is high; the quantum rod material
  • the light wave conversion efficiency is high, the material performance is stable, and the preparation method is simple and diverse, for example, it can be prepared from a solution and is rich in resources.
  • the polarization direction of the emitted light is random.
  • the liquid crystal display (LCD) works by utilizing the optical rotation and birefringence of the liquid crystal, and controlling the rotation of the liquid crystal by voltage, so that the linearly polarized light after passing through the upper polarizing plate rotates, and the lower polarization
  • the sheet (its polarization axis is perpendicular to the upper polarizing plate) is emitted.
  • the polarizing plate cooperates with the liquid crystal cell to function as an optical switch. Obviously, such optical switches do not fully control the light emitted by the randomly arranged quantum rods.
  • the emitted light after the irregularly arranged quantum rods has a random polarization direction and is not suitable for application to a liquid crystal display device, and the present invention proposes a polarizer.
  • the polarizer according to the present invention includes a stack of at least a functional layer capable of affecting a polarization direction of light waves and capable of converting a wavelength of light waves, and a protective layer located at an outermost side of the stacked body.
  • the functional layer is constructed by mixing a quantum rod material into a polarizing material.
  • the invention mixes the quantum rod material with the polarizing material, and reduces the process in the formation of the polarizer. At the same time, it can also play a good role in polarizing. More importantly, higher color gamut coverage can be achieved.
  • the quantum rod material is mixed into the polarizing material by surface grafting or surface coating. In this way, the quantum rod material and the polarizing material can achieve a more uniform and stable mixing effect.
  • the functional layer is formed by spraying, spin coating, printing, or slit coating. It can be seen that in the solution of the invention, the choice of process is very flexible.
  • the ratio of the quantum rod material to the polarizing material is adjusted by adding or reducing a treatment agent, a resin, or a solvent. It can be seen that in the functional layer of the polarizer of the present invention, in order to achieve more A good mixing effect makes it easy to change the proportion of each component.
  • the polarizing material is composed of dye molecules.
  • the quantum rod structure of the quantum rod material and the dye molecules of the polarizing material are arranged in a specific order such that the functional layer is capable of filtering the polarization direction of the light wave.
  • the quantum rod structure As the aspect ratio of the shape of the quantum material increases, the luminescence of the quantum material gradually shifts from circularly polarized light to linearly polarized light. Therefore, the quantum rod structure has the potential to change the polarization state of the incident light.
  • the quantum rod structure and the dye molecules are arranged in a specific rule by a stretching treatment, a rubbing treatment, a self-assembly treatment, a light irradiation treatment, or an electric drive treatment. It can be seen that the solution of the present invention is very flexible in selecting a specific process.
  • the functional layer includes a layered polarizing material composed of dye molecules, a quantum rod material having a quantum rod structure interspersed in the polarizing material, and triacetate disposed on both sides of the polarizing material.
  • Fiber layer The cellulose triacetate film has high light transmittance, good water resistance and certain mechanical strength, and can effectively protect the polarizing material and the quantum rod material.
  • the polarizer is sequentially provided with a first protective film, a first release film, a first adhesive layer, a functional layer, a second adhesive layer, and a second release type from one side to the other side. a film and a second protective film.
  • the first release film and the second release film are used to protect the first adhesive layer and the second adhesive layer, respectively.
  • the first protective film and the second protective film on the outermost side of the polarizer are used to provide integral chemical and mechanical protection.
  • the polarizer proposed by the present invention can overcome the problem of low polarization of the conventional quantum device on the basis of using the wavelength conversion function of the quantum rod to enhance the color gamut.
  • a quantum rod structure is added to the polarizer structure of the multilayer film, wherein the quantum rod material is added to the polarizing material for mixing, which effectively saves the manufacturing process.
  • Figure 1 shows a polarizer in accordance with the present invention.
  • the polarizer according to the present invention includes a stack of at least a functional layer capable of affecting a polarization direction of light waves and capable of converting a wavelength of light waves, and a protective layer located at an outermost side of the stacked body.
  • Figure 1 shows a polarizer 100 in accordance with the present invention.
  • the polarizer 100 is provided with a first protective film 1, a first release film 2, a first adhesive layer 3, a functional layer 4, a second adhesive layer 5, and a second release film 6 in this order from one side to the other side.
  • the functional layer package 4 includes a layered polarizing material 4.2 composed of dye molecules, a quantum rod material 4.3 having a quantum rod structure dispersed in the polarizing material 4.2, and a triacetate layer 4.1 disposed on both sides of the polarizing material 4.2.
  • a layered polarizing material 4.2 composed of dye molecules
  • a quantum rod material 4.3 having a quantum rod structure dispersed in the polarizing material 4.2
  • a triacetate layer 4.1 disposed on both sides of the polarizing material 4.2.
  • the cellulose triacetate (TAC) film 4.1 has high light transmittance, good water resistance and certain mechanical strength, and can protect the polarizing material 4.2 and the quantum rod material 4.3.
  • the quantum rod material 4.3 can, for example, be uniformly dispersed in the polarizing material 4.2.
  • the functional layer 4 can be constructed by mixing the quantum rod material 4.3 into the polarizing material 4.2.
  • the quantum rod material 4.3 is mixed into the polarizing material 4.2 by surface grafting treatment or surface coating treatment. Therefore, the quantum rod material 4.3 and the polarizing material 4.2 can be more uniformly and stably mixed by various methods such as surface grafting or surface coating.
  • the polarizing material 4.2 is composed of dye molecules.
  • the quantum rod structure of the quantum rod material 4.3 and the dye molecules of the polarizing material 4.2 are arranged in a specific rule so that the functional layer 4 can filter the polarization direction of the light wave.
  • the quantum rod structure of the quantum rod material 4.3 and the polarizing material 4.2 dye molecules may be arranged in a specific rule by a stretching treatment, a rubbing treatment, a self-assembly treatment, a light irradiation treatment, or an electric driving treatment.
  • a quantum rod structure is added to the polarizer structure of the multilayer film, wherein the quantum rod structure is added to a polarizing material having a polarizing function for mixing.
  • the functional layer 4 having a content of a sub-rod structure can be obtained.
  • the functional layer 4 can be formed into a film by spraying, spin coating, printing, or slit coating.
  • the ratio of the quantum rod material 4.3 and the polarizing material 4.2 can be adjusted by adding or reducing a treating agent, a resin or a solvent.
  • the functional layer 4 does not adopt an existing, unchanging formula, but in order to achieve a better mixing effect, the proportion of each component can be changed, This is achieved by adding or reducing a treatment agent, a resin, a solvent, and the like.
  • the quantum rod material 4.3 may be composed of Group IIB and Group VIA elements or composed of Group IIIA and Group VA elements.
  • the quantum rod material 4.3 may also be composed of a single element quantum rod material, a typical example of which is a carbon quantum rod material.
  • the quantum rod material 4.3 may be composed of a mixture of one or two or more kinds of semiconductor materials.
  • the quantum rod material 4.3 may include one of CdS, CdSe, CdTe, ZnSe, InP, InAs, and may also include a mixture of two or more of the semiconductor materials.
  • the material composition of the quantum rod material 4.3 is not particularly limited, and can be selected by a suitable material type to achieve a better color gamut lifting effect and a mixing effect.
  • the quantum rod material 4.3 may be an oil-soluble or water-soluble material, and there is no particular limitation between the two.
  • the quantum rod structure is typically a semiconductor nanocrystal having a cross-sectional radius of less than 20 nm and a length of about several tens of nanometers.
  • the first bonding layer 3 and the second bonding layer 5 are, for example, pressure sensitive adhesives.
  • the pressure sensitive adhesive used can be a high temperature resistant moisture-proof pressure sensitive adhesive.
  • the material of the first bonding layer 3 and the second bonding layer 5 may be a polar or non-polar material, and there is no particular limitation between the two. Specifically, the material of the first bonding layer 3 and the second bonding layer 5 may be an epoxy resin.
  • the first release film 2 and the second release film 6 are used to protect the first bonding layer 3 and the second bonding layer 5, respectively.
  • the first protective film 1 and the second protective film 7 located at the outermost side of the polarizer 100 are used to provide integral chemical and mechanical protection.
  • the polarizing property of a liquid crystal display is not considered in most cases. Since the light excited by the randomly oriented quantum rod is divergent, the linearly polarized light that has been passed through the polarizer into the liquid crystal cell is converted into non-linearly polarized light, which is very unfavorable for the liquid crystal layer to control the light. It is easy to cause light leakage, and the contrast of the entire display device will decrease. Therefore, the solution in the prior art is not an ideal and feasible structural solution. It is necessary to solve the correlation effect (polarization problem) generated after the introduction of quantum materials, and it is possible to obtain a better display device.
  • the correlation effect polarization problem
  • the quantum rod material is mixed with the polarizing material, the quantum rod structure is placed in the polarizing material (in the above embodiment, the polarizing material is composed of dye molecules), and even the quantum rod structure is made.
  • the dye molecules of the polarizing material are arranged according to a specific rule, which not only reduces the process in the formation of the polarizer, but also plays a good polarizing effect, and more importantly, Higher color gamut coverage can be achieved with the wavelength conversion function of the quantum rod. This perfectly solves the technical problems in the prior art.
  • the aspect of the present invention does not limit the position of the functional layer (having a polarization function and a wavelength conversion function) in the plurality of layer films of the entire polarizer, although one of the polarizers of the present invention is given above with reference to the drawings Embodiments, but can be adjusted according to specific application requirements;
  • the aspect of the present invention is not particularly limited to the position of the color filter of the entire liquid crystal display device, the position of the array substrate (Array), and the position of the black matrix (BM) layer. Wide range of applications and flexible use;
  • the solution of the present invention is a BOA technology (BM on Array) integrating a black matrix and an array substrate, a COA technology (Color-filter on Array) integrating a color filter and an array substrate, and Integrating the gate driver with the array substrate, more advanced technologies such as the GOA technology (Gate driver on Array) can be applied;
  • BOA technology BM on Array
  • COA technology Color-filter on Array
  • GOA technology Gate driver on Array
  • the polarizer according to the present invention can be applied to an upper polarizing plate (array substrate polarizing plate) or a lower polarizing plate (color film substrate polarizing plate) of a conventional liquid crystal display device;
  • the technical solution of the present invention is not particularly limited to the driving mode or the liquid crystal control mode of the liquid crystal display device, and is an In-Plane Switching (IPS), a Twisted Nematic (TN), and a vertical Various modes such as vertical alignment (VA), Organic Light Emitting Diode (OLED), and Quantum Dots Light Emitting Diode (QLED) are applicable.
  • IPS In-Plane Switching
  • TN Twisted Nematic
  • VA vertical alignment
  • OLED Organic Light Emitting Diode
  • QLED Quantum Dots Light Emitting Diode

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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)
  • Polarising Elements (AREA)

Abstract

显示技术领域，尤其涉及一种适用于显示器的偏光片（100）。偏光片（100）包括至少下述结构的堆叠体：功能层（4），其能够影响光波的偏振方向，且能够转换光波的波长；以及保护层，所述保护层位于所述堆叠体的最外侧。如此，将两项重要的功能集成为一体，既可提高色域覆盖率、光能利用率，又可以保证出射光的偏振状态符合要求，可大力提升显示器的显示效果。

Description

一种偏光片
相关申请的交叉引用
本申请要求享有于2015年9月9日提交的名称为“一种偏光片”的中国专利申请CN201510571489.2的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本发明涉及显示技术领域，尤其涉及一种适用于显示器的偏光片。
背景技术
随着科技的发展和社会的进步，人们对于信息交流和传递等方面的依赖程度日益增加。而显示器件作为信息交换和传递的主要载体和物质基础，现已成为信息光电研究领域中被争相抢占的热点和高地。
量子点(Quantum Dots，简称QD)是肉眼看不到的、极其微小的无机纳米晶体。每当受到光或电的刺激，量子点便会发出有色光线，光线的颜色由量子点的组成材料和大小形状决定。一般情况下，量子点的颗粒若较小，则会吸收长波，若其颗粒较大，则会吸收短波。例如，特定尺寸的量子点，可吸收短波的蓝色光，激发出呈现长波段光色的光。这一特性使得量子点能够改变光源发出的光线的颜色。
量子点显示技术在色域覆盖率、色彩控制精确性、红绿蓝色彩纯净度等各个维度已全面升级，被视为全球显示技术的制高点，也被视为影响全球的显示技术革命。通过量子点显示技术，革命性地实现了全色域显示，最真实地还原了图像色彩。
量子棒是横截面半径小于20nm、长度约数十个纳米的半导体纳米晶体，大部分量子棒包括由Ⅱ-Ⅵ族或Ⅲ-Ⅴ族元素组成的材料。由于量子限域效应，其内部的电子和空穴的运输受到限制，使得连续的能带结构变成分离的能级结构。当量子棒的尺寸不同时，电子与空穴的量子限域程度不一样，分离的能级结构也有所不同。在受到外来能量激发后，不同尺寸的量子棒即发出不同波长的光——也 就是各种颜色的光。
量子棒的优势在于：量子棒的尺寸是可以实现调控的，通过调控量子棒的尺寸，可以实现发光波长范围覆盖到红外及整个可见光波段，且发射光波段窄，色彩饱和度高；量子棒材料的光波转换效率高、材料性能稳定，且制备方法简单多样，例如可以从溶液中制备，资源丰富。
但是光线经过无规则排列的量子棒后，出射光的偏振方向是随机的，当经过无规则排列的量子棒后的发散光线穿过液晶时，不再能很好地控制相应像素点位的所有光线，液晶显示装置(Liquid Crystal Display,LCD)就会发生漏光现象。而液晶显示装置(Liquid Crystal Display,LCD)的工作原理即是利用液晶的旋光性和双折射，通过电压控制液晶的转动，使经过上偏振片后的线偏振光随之发生旋转，从下偏振片(其偏光轴与上偏振片垂直)射出。从而偏振片与液晶盒协同起到光学开关的作用。显然，这种光学开关对无规则排列的量子棒发出的光线无法完全起到控制作用。
发明内容
为了解决上述现有技术中的问题，即经过无规则排列的量子棒后的出射光，其偏振方向是随机的，不适合应用到液晶显示装置中，本发明提出了一种偏光片。
根据本发明的偏光片包括至少下述结构的堆叠体：功能层，其能够影响光波的偏振方向，且能够转换光波的波长；以及保护层，所述保护层位于所述堆叠体的最外侧。如此，将两项重要的功能集成为一体，既可提高色域覆盖率、光能利用率，又可以保证出射光的偏振状态符合要求，可大力提升显示器的显示效果。
在一个实施方式中，所述功能层通过将量子棒材料混合到偏光材料中来构造。本发明将量子棒材料与偏光材料混合，减化了偏光片成型中的工艺。同时，又可以起到很好的偏光作用。更重要的是可以达到更高的色域覆盖率。
在一个实施方式中，通过表面接枝处理或表面包覆处理来将量子棒材料混合到偏光材料中。如此，可使量子棒材料与偏光材料达到更均匀更稳定的混合效果。
在一个实施方式中，所述功能层通过喷涂、旋涂、打印或狭缝涂布的方式来成膜。可见，在本发明的方案中，工艺的选择十分灵活。
在一个实施方式中，通过添加或减少处理剂、树脂或溶剂来调整所述量子棒材料和所述偏光材料的比例。可见，在本发明的偏光片的功能层中，为了达到更 好的混合效果，可以非常容易地改变各成分的比例。
在一个实施方式中，所述偏光材料由染料分子构成。
在一个实施方式中，所述量子棒材料的量子棒结构和所述偏光材料的染料分子以特定规则排列，以使得所述功能层能够过滤光波的偏振方向。随着量子材料外形的纵横比的增加，量子材料的发光会逐渐从圆偏振光向线偏振光转变。所以量子棒结构完全具备改变入射光线偏振状态的潜力。
在一个实施方式中，通过拉伸处理、摩擦处理、自组装处理、光照射处理或电驱动处理来使得所述量子棒结构和所述染料分子以特定规则排列。可见本发明的方案对具体工艺的选择十分灵活。
在一个实施方式中，所述功能层包括由染料分子构成的层状的偏光材料、散布在所述偏光材料中的具有量子棒结构的量子棒材料以及设置在所述偏光材料两侧的三醋酸纤维层。三醋酸纤维素薄膜具有高光透过率、耐水性好又有一定机械强度，可以对偏光材料和量子棒材料进行有效的防护。
在一个实施方式中，所述偏光片从一侧到另一侧依次设置有第一保护膜、第一离型膜、第一粘接层、功能层、第二粘接层、第二离型膜以及第二保护膜。第一离型膜和第二离型膜分别用来对第一粘接层和第二粘接层进行保护。而位于偏光片的最外侧的第一保护膜和第二保护膜用来提供整体性的化学和机械保护。
综上所述，本发明所提出的偏光片，可以在利用量子棒的波长转换功能提升色域的基础上，克服传统的量子器件的偏光度不高的问题。在多层膜的偏光片结构中加入量子棒结构，其中量子棒材料加入到偏光材料中进行混合，这有效节省了制作工序。
上述技术特征可以各种适合的方式组合或由等效的技术特征来替代，只要能够达到本发明的目的。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1显示了根据本发明的偏光片。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例。
具体实施方式
下面将结合附图对本发明作进一步说明。
根据本发明的偏光片包括至少下述结构的堆叠体：功能层，其能够影响光波的偏振方向，且能够转换光波的波长；以及保护层，所述保护层位于所述堆叠体的最外侧。
具体地，图1显示了根据本发明的偏光片100。偏光片100从一侧到另一侧依次设置有第一保护膜1、第一离型膜2、第一粘接层3、功能层4、第二粘接层5、第二离型膜6以及第二保护膜7。
其中，功能层包4括由染料分子构成的层状的偏光材料4.2、散布在偏光材料4.2中的具有量子棒结构的量子棒材料4.3以及设置在偏光材料4.2两侧的三醋酸纤维层4.1。随着量子材料外形的纵横比的增加，量子材料的发光会逐渐从圆偏振光向线偏振光转变。所以量子棒结构完全具备改变入射光线偏振状态的潜力。三醋酸纤维素(TAC)薄膜4.1具有高光透过率、耐水性好又有一定机械强度，可以对偏光材料4.2和量子棒材料4.3进行防护。
量子棒材料4.3例如可以均匀地散布在偏光材料4.2中。
在制造工序方面，功能层4可通过将量子棒材料4.3混合到偏光材料4.2中来构造。优选地，通过表面接枝处理或表面包覆处理来将量子棒材料4.3混合到偏光材料4.2中。因此，可以通过表面接枝或表面包覆等多种方法使量子棒材料4.3与偏光材料4.2达到更均匀更稳定的混合效果。
偏光材料4.2由染料分子构成。量子棒材料4.3的量子棒结构和偏光材料4.2的染料分子以特定规则排列，以使得功能层4能够过滤光波的偏振方向。具体地，可通过拉伸处理、摩擦处理、自组装处理、光照射处理或电驱动处理来使得量子棒材料4.3的量子棒结构和偏光材料4.2染料分子以特定规则排列。
以此方式，可以在提升色域的基础上，克服传统量子器件的偏光度不高的问题。即在多层膜的偏光片结构中加入量子棒结构，其中量子棒结构加入到具有偏光功能的偏光材料中进行混合。
将混合完成的材料进行成膜后可得到含量子棒结构的功能层4。功能层4可通过喷涂、旋涂、打印或狭缝涂布(Slit-coat)等方式来进行成膜。
可以通过添加或减少处理剂、树脂或溶剂来调整量子棒材料4.3和偏光材料4.2的比例。由此可见，在根据本发明的实施例中，功能层4并非采用既有的、一成不变的配方，而是为了达到更好的混合效果，可以改变各成分的比例，只需 通过添加或减少处理剂、树脂和溶剂等来实现。
在材料构成方面，量子棒材料4.3可以由IIB和ⅥA族元素构成或由IIIA和VA族元素构成。备选地，量子棒材料4.3也可以由单元素量子棒材料构成，这种情况中典型的例子即碳量子棒材料。
另一方面，量子棒材料4.3可以由一种或两种以上半导体材料混合构成。例如，量子棒材料4.3可以包括CdS、CdSe、CdTe、ZnSe、InP、InAs中的一种半导体材料，也可以包括其中两种以上半导体材料的混合。
可见，在根据本发明的实施例中，对量子棒材料4.3的材料构成并无特殊限定，可以通过适当的材料种类选取以达到较好的色域提升效果和混合效果。
量子棒材料4.3可以为油溶性或水溶性材料，在这二者之间并没有特别的限定。
在尺寸方面，量子棒结构通常是横截面半径小于20nm、长度约数十个纳米的半导体纳米晶体。
第一粘接层3和第二粘接层5例如为压敏胶。所使用的压敏胶可为耐高温防潮压敏胶。第一粘接层3和第二粘接层5的材料可为极性或非极性材料，在这二者之间并没有特别的限定。具体地，第一粘接层3和第二粘接层5的材料可以是环氧树脂。
第一离型膜2和第二离型膜6分别用来对第一粘接层3和第二粘接层5进行保护。而位于偏光片100的最外侧的第一保护膜1和第二保护膜7用来提供整体性的化学和机械保护。
在通过传统方法制备的量子显示装置中，大多数情况下并未考虑液晶显示装置(Liquid Crystal Display,LCD)的偏光性。由于无规则定向的量子棒被激发出的光为发散的，使得本来经过偏光片得到的进入液晶盒内的线偏振光又被转变为非线偏振光，这样非常不利于液晶层对光线的控制，容易造成漏光现象，整个显示装置的对比度就会下降。所以现有技术中的方案并非为一种理想可行的结构方案。有必要对量子材料引入后所产生的关联影响(偏光问题)加以解决，才有可能得到较好的显示装置。而在上面所介绍的本发明的技术方案中，将量子棒材料与偏光材料混合，将量子棒结构置于偏光材料中(在上述实施例中偏光材料由染料分子构成)，甚至使得量子棒结构和偏光材料的染料分子按照特定规则排列，这样不仅减化了偏光片成型中的工艺，同时又可以起到很好的偏光作用，更重要的是 利用量子棒的波长转换功能可以达到更高的色域覆盖率。这完美地解决了现有技术中的技术问题。
同时，本发明所提出的偏光片还带来了诸多优势：
(1)本发明的方案并未限定功能层(具有偏光功能和波长转换功能)在整个偏光片的多个层膜中的设置位置，虽然上面参考附图给出了本发明的偏光片的一种实施方式，但可以根据具体的应用需求进行调整；
(2)本发明的方案对整个液晶显示装置的滤光片层(Color Filter)的位置、阵列基板(Array)的位置以及黑色矩阵(Black Matrix,BM)层的位置均未作特有的限定，应用范围广泛，使用方式灵活；
(3)本发明的方案对于将黑色矩阵与阵列基板集成在一起的BOA技术(BM on Array)，将彩色滤光片与阵列基板集成在一起的COA技术(Color-filter on Array)，以及对于将栅极驱动器与阵列基板集成在一起GOA技术(Gate driver on Array)等较为新兴的技术均可适用；
(4)根据本发明的偏光片可适用于传统液晶显示装置的上偏振片(阵列基板偏振片)或下偏振片(彩膜基板偏振片)；
(5)上面介绍的功能层(具有偏光功能和波长转换功能)亦可以用于内置或外置的其他成膜层，实现相似或与相应的其他功能；
(6)本发明的技术方案对液晶显示装置的驱动模式或液晶控制模式并没有特别的限定，对平面转换模式(In-Plane Switching,IPS)、扭曲向列模式(Twisted Nematic,TN)、垂直取向模式(vertical alignment,VA)、有机发光二极管模式(Organic Light Emitting Diode,OLED)以及量子点发光二极管模式(Quantum Dots Light Emitting Diode,QLED)等多种模式均适用。
虽然在本文中参照了特定的实施方式来描述本发明，但是应该理解的是，这些实施例仅仅是本发明的原理和应用的示例。因此应该理解的是，可以对示例性的实施例进行许多修改，并且可以设计出其他的布置，只要不偏离所附权利要求所限定的本发明的精神和范围。应该理解的是，可以通过不同于原始权利要求所描述的方式来结合不同的从属权利要求和本文中所述的特征。还可以理解的是，结合单独实施例所描述的特征可以使用在其他所述实施例中。

Claims (10)

  1. 一种偏光片，其中，包括至少下述结构的堆叠体：
    功能层，其能够影响光波的偏振方向，且能够转换光波的波长；以及
    保护层，所述保护层位于所述堆叠体的最外侧。
  2. 根据权利要求1所述的偏光片，其中，所述功能层通过将量子棒材料混合到偏光材料中来构造。
  3. 根据权利要求2所述的偏光片，其中，通过表面接枝处理或表面包覆处理来将量子棒材料混合到偏光材料中。
  4. 根据权利要求2所述的偏光片，其中，所述功能层通过喷涂、旋涂、打印或狭缝涂布的方式来成膜。
  5. 根据权利要求2所述的偏光片，其中，通过添加或减少处理剂、树脂或溶剂来调整所述量子棒材料和所述偏光材料的比例。
  6. 根据权利要求2所述的偏光片，其中，所述偏光材料由染料分子构成。
  7. 根据权利要求6所述的偏光片，其中，所述量子棒材料的量子棒结构和所述偏光材料的染料分子以特定规则排列，以使得所述功能层能够过滤光波的偏振方向。
  8. 根据权利要求7所述的偏光片，其中，通过拉伸处理、摩擦处理、自组装处理、光照射处理或电驱动处理来使得所述量子棒结构和所述染料分子以特定规则排列。
  9. 根据权利要求1所述的偏光片，其中，所述功能层包括由染料分子构成的层状的偏光材料、散布在所述偏光材料中的具有量子棒结构的量子棒材料以及设置在所述偏光材料两侧的三醋酸纤维层。
  10. 根据权利要求9所述的偏光片，其中，所述偏光片从一侧到另一侧依次设置有第一保护膜、第一离型膜、第一粘接层、功能层、第二粘接层、第二离型膜以及第二保护膜。
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US12240812B2 (en) 2019-01-22 2025-03-04 Keythera (Suzhou) Pharmaceuticals Co. Ltd. Compound for inhibiting PGE2/EP4 signaling transduction inhibiting, preparation method therefor, and medical uses thereof

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