WO2018166175A1 - 偏光片及显示装置 - Google Patents

偏光片及显示装置 Download PDF

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Publication number
WO2018166175A1
WO2018166175A1 PCT/CN2017/103888 CN2017103888W WO2018166175A1 WO 2018166175 A1 WO2018166175 A1 WO 2018166175A1 CN 2017103888 W CN2017103888 W CN 2017103888W WO 2018166175 A1 WO2018166175 A1 WO 2018166175A1
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WO
WIPO (PCT)
Prior art keywords
polarizer
layer
color
disposed
color film
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PCT/CN2017/103888
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English (en)
French (fr)
Inventor
解晓龙
吕凤珍
张新霞
郭霄
李群
倪欢
姚成鹏
Original Assignee
京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 合肥鑫晟光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/767,196 priority Critical patent/US11022836B2/en
Publication of WO2018166175A1 publication Critical patent/WO2018166175A1/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
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising 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
    • 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
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • 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 
    • G02F1/015—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 semiconductor elements with at least one potential jump barrier, e.g. PN, PIN junction
    • G02F1/017—Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells
    • G02F1/01791—Quantum boxes or quantum dots
    • 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
    • G02F1/133567—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the back side

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a polarizer and a display device.
  • the liquid crystal display includes a thin film transistor (TFT) substrate, a color filter substrate, and a liquid crystal layer between the two substrates.
  • the color film substrate mainly serves to filter the incident light to achieve the purpose of color display, and the incident mixed color light passes through the red/green/blue color materials, and then passes through the red/green/blue band light respectively.
  • the color display in this way is often affected by the dye and cannot achieve a high color gamut.
  • the red/green/blue color materials can only transmit light in a part of the band, the light intensity loss is severe.
  • Embodiments of the present invention provide a polarizer and a display device.
  • a polarizer in a first aspect of the present disclosure, includes a polarizing layer and a color film layer on the polarizing layer, wherein the color film layer includes quantum dots.
  • the polarizing layer includes a first protective layer, a polarizing functional layer, and a second protective layer in this order from bottom to top.
  • the color film layer is on the second protective layer.
  • the polarizer further includes a third protective layer on the color film layer.
  • the polarizer further includes a protective film on the third protective layer.
  • the polarizer further includes an adhesive layer and a release film sequentially under the first protective layer.
  • the color film layer comprises a color block, wherein the quantum dots are included in the color block.
  • the color film layer further includes a black matrix between adjacent ones of the color blocks.
  • the material of the adhesive layer comprises a pressure sensitive adhesive
  • the materials of the first protective layer, the second protective layer and the third protective layer comprise cellulose triacetate
  • the material of the functional layer includes polyvinyl alcohol.
  • the material of the quantum dots comprises a semiconductor material.
  • a display device in a second aspect of the present disclosure, includes an array substrate and a counter substrate opposite to the array substrate, and is disposed on at least one of the array substrate and the opposite substrate Any of the polarizers described in the first aspect of the present disclosure.
  • the polarizer is disposed on the array substrate, and the polarizer is disposed such that the color film layer is further away from the opposite substrate than the polarizing layer.
  • the polarizer is disposed on the opposite substrate, and the polarizer is disposed such that the color film layer is further away from the array substrate than the polarizing layer.
  • the polarizer is disposed on the opposite substrate and the array substrate, and the polarizer on the opposite substrate is disposed such that the color film layer is compared to the The polarizing layer is further away from the array substrate, and the polarizer on the array substrate is disposed such that the color film layer is further away from the opposite substrate than the polarizing layer.
  • the opposite substrate further includes a black matrix located on a side of the opposite substrate where the polarizer is not disposed or in the color film layer.
  • FIG. 1 schematically illustrates a cross-sectional view of an exemplary polarizer in accordance with an embodiment of the present disclosure
  • FIG. 2 schematically illustrates a cross-sectional view of an exemplary polarizer in accordance with another embodiment of the present disclosure
  • 3A, 3B, 3C, 3D schematically illustrate cross-sectional views of an exemplary display device in accordance with an embodiment of the present disclosure
  • an element or layer when an element or layer is referred to as being “on” another element or layer, it may be directly on the other element or layer, or an element or layer may be present; likewise, when the element or layer is When the other element or layer is "under”, it may be directly under the other element or layer, or there may be at least one intermediate element or layer; when the element or layer is referred to as being between the two or two layers When it can be between the two elements or between the two layers A single element or layer, or more than one intermediate element or layer.
  • Quantum Dots are composed of a finite number of atoms, all of which are in the order of nanometers in three dimensions.
  • the material of the quantum dots typically comprises a semiconductor material such as, but not limited to, a Group II-VI compound semiconductor material (such as CdS, CdSe, CdTe, ZnSe, etc.) or a Group III-V compound semiconductor material (such as InP, InAs, etc.).
  • the emission spectrum of the quantum dot can be controlled by changing the size of the quantum dot, so that by changing the size of the quantum dot material and its chemical composition, the emission spectrum of the quantum dot can cover the entire visible region. Since quantum dots have a broad excitation spectrum and a narrow emission spectrum, quantum dots can in turn increase color purity. In addition, quantum dots have advantages in terms of color saturation and light utilization. The use of quantum dots for color film can improve color gamut, color purity and transmittance for better display.
  • a polarizer comprising a quantum dot color film is provided.
  • the polarizer is applied to a display device, which can improve the color gamut, color purity, and light utilization of the display device, thereby improving display color quality. Further, since the color film layer is formed in the polarizer, the structure of the display device can be further simplified, thereby making the display device simple and lightweight.
  • FIG. 1 schematically illustrates a cross-sectional view of an exemplary polarizer 10 in accordance with an embodiment of the present disclosure.
  • the polarizer 10 may include a polarizing layer 11 and a color film layer 12 on the polarizing layer 11.
  • the color film layer 12 can include quantum dots.
  • the polarizing layer 11 includes not only the polarizing functional layer 112 for implementing the polarizing function, but also other additional layers to achieve additional functions.
  • the polarizing layer 11 may include a first protective layer 111, a polarizing functional layer 112, and a second protective layer 113 in order from bottom to top.
  • the material of the first protective layer 111 and the second protective layer 113 may include cellulose triacetate (TAC), and the material of the polarizing functional layer 112 includes polyvinyl alcohol (PVA).
  • TAC cellulose triacetate
  • PVA polyvinyl alcohol
  • the color film layer 12 may be located on the second protective layer 113.
  • the polarizer 10 may further include a third protective layer 13 on the color film layer 12.
  • the third protective layer 13 can prevent the surface of the color filter layer 12 from being contaminated or damaged.
  • the material of the third protective layer 13 may include the same material as the first protective layer 111 or the second protective layer 113, for example, cellulose triacetate (TAC).
  • the polarizer 10 may additionally include a protective film 14 on the third protective layer 13 to protect the polarizer 10 from damage. After the polarizer 10 is attached to the display device, the protective film 14 can be removed.
  • the polarizer 10 may further include an adhesive layer 15 and a release film 16 which are sequentially disposed under the polarizing layer 11.
  • the material of the adhesive layer 15 may include a pressure sensitive adhesive (PSA), or other material capable of achieving a bonding effect as well.
  • PSA pressure sensitive adhesive
  • the release film 16 can be removed, and the polarizer 10 is bonded to the array substrate or the opposite substrate through the adhesive layer 15.
  • color film layer 12 can include a color block, as well as quantum dots contained therein.
  • the color block may include a red block (R), a green block (G), and a blue block (B).
  • the red block (R) contains quantum dots emitting red light
  • the green block (G) contains quantum dots emitting green light
  • the blue block (B) contains quantum dots emitting blue light for realizing red
  • the quantum dot material may comprise a semiconductor material selected from the group consisting of a II-VI compound semiconductor material and a III-V compound semiconductor material.
  • II-VI compound semiconductor materials include, but are not limited to, CdS, CdSe, CdTe, ZnSe, III-V compound semiconductor materials including, but not limited to, InP, InAs.
  • any suitable color film layer may be disposed in the polarizer. s position.
  • the color gamut, color purity, and transmittance of the light emitted through the polarizer can be improved to achieve a better display effect.
  • the structure of the polarizer 10 shown in FIG. 1 is also suitable for other embodiments described herein, and the description thereof will not be repeated in other embodiments.
  • FIG. 2 schematically illustrates a cross section of an exemplary polarizer 20 in accordance with another embodiment of the present disclosure.
  • color film layer 12 additionally includes a black matrix 21 between adjacent color blocks.
  • the other structure and function of the polarizer 20 are the same as those of the polarizer 10 which has been described above, and will not be repeatedly described in this embodiment.
  • a display device is also provided.
  • the display device can improve color gamut, color purity, and light utilization, thereby improving display color quality.
  • An exemplary display device provided by an embodiment of the present disclosure will now be described in detail with reference to FIGS. 3A, 3B, 3C, 3D.
  • the display device 30 may include an array substrate 31 and an opposite substrate 32 opposite to the array substrate 31, and a polarizer 10 according to the above-described embodiment of the present disclosure disposed on at least one of the array substrate 31 and the opposite substrate 32.
  • the display device 30 may further include a liquid crystal layer 33 disposed between the array substrate 31 and the opposite substrate 32.
  • the polarizer 10 may be disposed on the array substrate 31 as a lower polarizer of the display device 30, and the polarizer 10 is disposed such that the color filter layer 12 is compared to the polarizing layer. 11 is further away from the opposite substrate 32.
  • the display device 30 further includes an upper polarizer (not shown), and the upper polarizer and the lower polarizer are used in combination to enable normal display of the display device 30.
  • the polarizer 10 is disposed such that the color film layer 12 is further away from the opposite substrate 32 than the polarizing layer 11, so that the quantum dots in the color film layer 12 can not interfere with the normal control of the light polarization of the liquid crystal molecules. This eliminates the potential adverse effects of quantum dots on normal display due to interference with light polarization.
  • the polarizer 10 may also be disposed on the opposite substrate 32 as an upper polarizer of the display device 30, and the polarizer 10 is disposed such that the color filter layer 12 is compared
  • the polarizing layer 11 is further away from the array substrate 31.
  • the display device 30 further includes a lower polarizer (not shown), and the use of the upper polarizer and the lower polarizer enables normal display of the display device 30.
  • the opposite substrate 32 may further include a black matrix 21 located on a side of the opposite substrate 32 where the polarizer 10 is not disposed.
  • the black matrix 21 is located adjacent to the color film layer 12 of the polarizer 10. Between the colored blocks. The black matrix 21 is used, for example, to prevent light leakage between color blocks, color mixing, and increase contrast of colors and the like.
  • the polarizer 10 is disposed such that the color film layer 12 is further away from the array substrate 31 than the polarizing layer 11, so that the quantum dots in the color film layer 12 can not interfere with the normal control of the light polarization of the liquid crystal molecules. This eliminates the potential adverse effects of quantum dots on normal display due to interference with light polarization.
  • the polarizer 10 may also be disposed on the opposite substrate 32 and the array substrate 31 as the upper polarizer and the lower polarizer of the display device, respectively.
  • the polarizer 10 on the opposite substrate 32 is disposed such that the color filter layer 12 is further away from the array substrate 31 than the polarizing layer 11, and the polarizer 10 on the array substrate 31 is disposed such that the color filter layer 12 is compared with the polarizing layer 11 is further away from the opposite substrate 32.
  • the opposite substrate 32 may further include a black matrix 21 on a side of the opposite substrate 32 on which the polarizer 10 is not disposed, for example, to prevent light leakage and color mixing between the color blocks. And increase the contrast of colors and so on. It should be understood that the opposite substrate 32 may further include a black matrix 21, wherein the black matrix 21 may be located between adjacent color blocks of the color film layer 12 of the polarizer 10.
  • the polarizing plate 10 can be easily attached to the array substrate 31 or the opposite substrate 32 through the adhesive layer 15, which simplifies the manufacturing process and improves productivity with respect to the conventional method.
  • the opposite substrate 32 may include, as the common electrode, a transparent material such as indium tin oxide (ITO) or indium zinc oxide (IZO) formed on the opposite substrate 32 in addition to the above-described components. Conductive layers (not shown) or other components based on actual needs.
  • the array substrate 31 may include, in addition to the above-described components, a thin film transistor (TFT) formed on the array substrate 31 or a plurality of pixel electrodes electrically connected to the thin film transistor and formed of a transparent conductive material such as ITO and IZO (not shown). Out).
  • TFT thin film transistor
  • these components are not described in detail, but this does not mean that the opposite substrate 32 and the array substrate 31 described herein do not have these components.
  • a polarizer containing a quantum dot when applied to a display device, not only can it be improved The color gamut, color purity, and light utilization of the display device, thereby improving display color quality, and avoiding potential problems with In-Cell polarizers.

Abstract

一种偏光片（10,20）及显示装置（30）。偏光片（10,20）包括偏光层（11），以及位于偏光层（11）上的彩膜层（12），其中彩膜层（12）包括量子点。偏光片（10,20）应用于显示装置（30）时，能够提高显示装置（30）的色域、色纯度以及提升光的利用率，进而提高显示色彩的质量。

Description

偏光片及显示装置
本申请要求于2017年3月15日递交的中国专利申请第201710153157.1号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开涉及显示技术领域，尤其涉及一种偏光片及显示装置。
背景技术
液晶显示器包括薄膜晶体管(TFT)基板、彩膜基板和两基板之间的液晶层。彩膜基板主要起到过滤入射光来达到彩色显示的目的，入射的混色光经过红/绿/蓝彩色材料后，分别通过红/绿/蓝波段的光。然而，这种方式的彩色显示往往受染料的影响，无法达成高色域。此外，由于红/绿/蓝彩色材料分别只能透过部分波段的光，因此光强损失严重。
发明内容
本发明实施例提供了一种偏光片及显示装置。
在本公开的第一方面中，提供一种偏光片，其包括偏光层以及位于所述偏光层上的彩膜层，其中，所述彩膜层包括量子点。
在一个实施例中，所述偏光层由下而上依次包括第一保护层、偏光功能层以及第二保护层。
在一个实施例中，所述彩膜层位于所述第二保护层上。
在一个实施例中，所述偏光片还包括位于所述彩膜层上的第三保护层。
在一个实施例中，所述偏光片还包括位于所述第三保护层上的保护膜。
在一个实施例中，所述偏光片还包括依次位于所述第一保护层下的粘合层和离型膜。
在一个实施例中，所述彩膜层包括彩色阻块，其中所述量子点被包含在所述彩色阻块中。
在一个实施例中，所述彩膜层还包括位于相邻的所述彩色阻块之间的黑矩阵。
在一个实施例中，所述粘合层的材料包括压敏胶，所述第一保护层、所述第二保护层和所述第三保护层的材料包括三醋酸纤维素，以及所述偏光功能层的材料包括聚乙烯醇。
在一个实施例中，所述量子点的材料包括半导体材料。
在本公开的第二方面中，提供一种显示装置，其包括阵列基板和与所述阵列基板相对的对置基板，以及设置在所述阵列基板和所述对置基板中的至少一者上的在本公开第一方面中描述的任意一种偏光片。
在一个实施例中，所述偏光片被设置在所述阵列基板上，所述偏光片被设置为使所述彩膜层相比于所述偏光层更加远离所述对置基板。
在一个实施例中，所述偏光片被设置在所述对置基板上，所述偏光片被设置为使所述彩膜层相比于所述偏光层更加远离所述阵列基板。
在一个实施例中，所述偏光片被设置在所述对置基板和所述阵列基板上，所述对置基板上的所述偏光片被设置为使所述彩膜层相比于所述偏光层更加远离所述阵列基板，所述阵列基板上的所述偏光片被设置为使所述彩膜层相比于所述偏光层更加远离所述对置基板。
在一个实施例中，所述对置基板还包括黑矩阵，所述黑矩阵位于所述对置基板的未设置所述偏光片的一侧或位于所述彩膜层中。
适应性的进一步的方面和范围从本文中提供的描述变得明显。应当理解，本申请的各个方面可以单独或者与一个或多个其它方面组合实施。还应当理解，本文中的描述和特定实施例旨在说明的目的，并不旨在限制本申请的范围。
附图说明
本文中描述的附图用于仅对所选择的实施例的说明的目的，并不是所有可能的实施方式，并且不旨在限制本申请的范围，其中：
图1示意性示出了根据本公开实施例的示例性偏光片的截面图；
图2示意性示出了根据本公开另一个实施例的示例性偏光片的截面图；
图3A、3B、3C、3D示意性示出了根据本公开实施例的示例性显示装置的截面图；
贯穿这些附图的各个视图，相应的参考编号指示相应的部件或特征。
具体实施方式
首先需要说明的是，除非上下文中另外明确地指出，否则在本文和所附权利要求中所使用的词语的单数形式包括复数，反之亦然。因而，当提及单数时，通常包括相应术语的复数。相似地，措辞“包含”和“包括”将解释为包含在内而不是独占性地。在本文中使用术语“示例”之处，特别是当其位于一组术语之后时，所述“示例”仅仅是示例性的和阐述性的，且不应当被认为是独占性的或广泛性的。术语“第一”、“第二”、“第三”等仅用于描述的目的，而不能理解为指示或暗示相对重要性及形成顺序。
此外，在附图中，为了清楚起见夸大了各层的厚度及区域。应当理解的是，术语“纵向”、“径向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开的实施例和简化描述，而不是指示或暗示所指的组件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。此外，当元件或层被称为在另一元件或层“上”时，它可以直接在该另一元件或层上，或者可以存在中间的元件或层；同样，当元件或层被称为在另一元件或层“下”时，它可以直接在该另一元件或层下，或者可以存在至少一个中间的元件或层；当元件或层被称为在两元件或两层“之间”时，其可以为该两元件或两层之间的 唯一的元件或层，或者可以存在一个以上的中间元件或层。
现将参照附图更全面地描述示例性的实施例。
量子点(Quantum Dot)是由有限数目的原子组成，量子点在三个维度上的尺寸均在纳米数量级。量子点的材料通常包括半导体材料，例如，包括但不限于，II-VI族化合物半导体材料(如CdS、CdSe、CdTe、ZnSe等)或III-V族化合物半导体材料(如InP、InAs等)。通过改变量子点的尺寸能够控制量子点的发射光谱，因此通过改变量子点材料的尺寸及其化学组成能够使量子点的发射光谱覆盖整个可见光区。由于量子点具有宽的激发谱和窄的发射谱，量子点进而可以提高色纯度。此外，量子点在色彩饱和度和光利用率方面均具有优势。将量子点用于彩膜能够提高色域、色纯度和透过率，达到更好的显示效果。
在本文描述的实施例中，提供了一种包括量子点彩膜的偏光片。该偏光片应用于显示装置，能够提高显示装置的色域、色纯度和光的利用率，进而提高显示色彩质量。此外，由于彩膜层形成在偏光片中，能够进一步简化显示装置的结构，从而使显示装置简单而轻便。
现在，将参照图1详细描述本公开实施例提供的示例性偏光片。
图1示意性示出了根据本公开实施例的示例性偏光片10的截面图。该偏光片10可包括偏光层11以及位于偏光层11上的彩膜层12。在该实施例中，彩膜层12可包括量子点。本领域的技术人员能够理解，偏光层11不仅包括用于实现偏光功能的偏光功能层112，还可以包括其它附加层以实现附加的功能。
在一个示例实施例中，偏光层11可由下而上依次包括第一保护层111、偏光功能层112以及第二保护层113。根据本公开的实施例，第一保护层111和第二保护层113的材料可包括三醋酸纤维素(TAC)，偏光功能层112的材料包括聚乙烯醇(PVA)。应理解，保护层和偏光功能层的材料并不局限于此，能实现保护和偏光作用的其它材料均适用。
在一个示例实施例中，彩膜层12可位于第二保护层113上。根据本公 开的实施例，偏光片10还可以包括位于彩膜层12上的第三保护层13。第三保护层13能够防止彩膜层12的表面被污染或损伤。根据本公开的实施例，第三保护层13的材料可以包括与第一保护层111或第二保护层113相同的材料，例如，三醋酸纤维素(TAC)。
在一个示例实施例中，偏光片10还可附加地包括位于第三保护层13上的保护膜14，以保护偏光片10不受损坏。在偏光片10贴附在显示装置上后，可以去除该保护膜14。
在一个示例实施例中，偏光片10还可包括依次位于偏光层11下的粘合层15和离型膜16。根据本公开的实施例，粘合层15的材料可包括压敏胶(PSA)，或者能够同样实现粘合效果的其它材料。在粘合时，可将离型膜16去除，通过粘合层15将偏光片10粘合在阵列基板或对置基板上。
在一个示例实施例中，彩膜层12可包括彩色阻块，以及包含在其中的量子点。根据本公开的实施例，彩色阻块可包括红色阻块(R)、绿色阻块(G)和蓝色阻块(B)。具体地，红色阻块(R)包含发红色光的量子点，绿色阻块(G)包含发绿色光的量子点，蓝色阻块(B)包含发蓝色光的量子点，用来实现红、绿、蓝三原色的显示。在一个示例实施例中，量子点材料可包括选自II-VI族化合物半导体材料和III-V族化合物半导体材料的半导体材料。例如，II-VI族化合物半导体材料包括但不限于CdS、CdSe、CdTe、ZnSe，III-V族化合物半导体材料包括但不限于InP、InAs。
应当理解，本公开的实施例并不局限于上述结构，只要彩膜层中的量子点材料不会破坏通过偏光功能层的偏振光的偏振，可以将彩膜层设置在偏光片中的任何适宜的位置。
根据本公开的实施例，将量子点用于偏光片，能够提高通过偏光片的出射光的色域、色纯度和透过率，达到更好的显示效果。
需要说明的是，在图1中示出的偏光片10的结构也适于本文描述的其它实施例，在其它实施例中不再重复对其描述。
图2示意性示出了根据本公开另一个实施例的示例性偏光片20的截面 图。在一个示例实施例中，彩膜层12还附加地包括位于相邻的彩色阻块之间的黑矩阵21。该偏光片20的其它结构和功能与上面已经描述的偏光片10的结构和功能相同，在本实施例中不再重复描述。
在本文描述的实施例中，还提供了一种显示装置。该显示装置能够提高色域、色纯度和光的利用率，进而提高显示色彩质量。现将参照图3A、3B、3C、3D详细描述本公开实施例提供的示例性显示装置。
图3A、3B、3C、3D示意性示出了根据本公开实施例的示例性显示装置30的截面图。该显示装置30可包括阵列基板31和与阵列基板31相对的对置基板32，以及设置在阵列基板31和对置基板32中的至少一者上的根据本公开的上述实施例的偏光片10。此外，显示装置30还可包括设置在阵列基板31和对置基板32之间的液晶层33。
在一个示例实施例中，如图3A所示，偏光片10可以被设置在阵列基板31上作为显示装置30的下偏光片，并且偏光片10被设置为使彩膜层12相比于偏光层11更加远离对置基板32。应当理解，显示装置30还包括上偏光片(未示出)，将上偏光片和下偏光片配合使用，能够实现显示装置30的正常显示。
由于量子点发射的光是电子激发光，因此偏振状态不受控制。将偏光片10设置为使彩膜层12相比于偏光层11更加远离对置基板32，能够使得彩膜层12中的量子点不会干扰液晶分子对光偏振的正常控制。这消除了量子点因干扰光偏振而对正常显示的潜在不利影响。
在一个示例实施例中，如图3B所示，偏光片10还可以被设置在对置基板32上作为显示装置30的上偏光片，并且偏光片10被设置为使彩膜层12相比于偏光层11更加远离阵列基板31。应当理解，显示装置30还包括下偏光片(未示出)，将上偏光片和下偏光片配合使用，能够实现显示装置30的正常显示。根据本公开的一个实施例，对置基板32还可包括黑矩阵21，黑矩阵21位于对置基板32的未设置偏光片10的一侧。根据本公开的另一实施例，如图3C所示，黑矩阵21位于偏光片10的彩膜层12的相邻 的彩色阻块之间。黑矩阵21用于例如防止彩色阻块之间的漏光、混色、以及增加色彩的对比性等。
由于量子点发射的光是电子激发光，因此偏振状态不受控制。将偏光片10设置为使彩膜层12相比于偏光层11更加远离阵列基板31，能够使得彩膜层12中的量子点不会干扰液晶分子对光偏振的正常控制。这消除了量子点因干扰光偏振而对正常显示的潜在不利影响。
在一个示例实施例中，如图3D所示，偏光片10还可以被设置在对置基板32和阵列基板31上，分别作为显示装置的上偏光片和下偏光片。对置基板32上的偏光片10被设置为使彩膜层12相比于偏光层11更加远离阵列基板31，阵列基板31上的偏光片10被设置为使彩膜层12相比于偏光层11更加远离对置基板32。根据本公开的一个实施例，对置基板32还可包括黑矩阵21，黑矩阵21位于对置基板32的未设置偏光片10的一侧，用于例如防止彩色阻块之间的漏光、混色、以及增加色彩的对比性等。应当理解，对置基板32还可包括黑矩阵21，其中，黑矩阵21可位于偏光片10的彩膜层12的相邻的彩色阻块之间。
需要说明的是，在上述实施例中，可以容易地通过粘合层15将偏光片10附着到阵列基板31上或对置基板32上，相对于常规方法，简化了制造工艺并提高生产率。
应当理解，对置基板32除了包括上述的组件之外，还可以包括形成在对置基板32上的由氧化铟锡(ITO)或氧化铟锌(IZO)等透明材料形成的用作公共电极的导电层(未示出)或基于实际需要的其它组件。阵列基板31除了包括上述的组件之外，还可以包括形成在阵列基板31上的薄膜晶体管(TFT)或与薄膜晶体管电连接且由ITO和IZO等透明导电材料形成的多个像素电极(未示出)。在本公开的实施例中，这些组件未做详细说明，但是这并不意味着这里描述的对置基板32和阵列基板31不具有这些组件。
如上所述，将含有量子点的偏光片应用于显示装置时，不仅能够提高 显示装置的色域、色纯度和光的利用率，进而提高显示色彩质量，而且能够避免In-Cell偏光片的潜在问题。
以上为了说明和描述的目的提供了实施例的前述描述。其并不旨在是穷举的或者限制本申请。特定实施例的各个元件或特征通常不限于特定的实施例，但是，在合适的情况下，这些元件和特征是可互换的并且可用在所选择的实施例中，即使没有具体示出或描述。同样也可以以许多方式来改变。这种改变不能被认为脱离了本申请，并且所有这些修改都包含在本申请的范围内。

Claims (15)

  1. 一种偏光片，其中，包括：
    偏光层；以及
    位于所述偏光层上的彩膜层，其中
    所述彩膜层包括量子点。
  2. 根据权利要求1所述的偏光片，其中，所述偏光层由下而上依次包括：
    第一保护层、偏光功能层以及第二保护层。
  3. 根据权利要求2所述的偏光片，其中，所述彩膜层位于所述第二保护层上。
  4. 根据权利要求3所述的偏光片，其中，还包括位于所述彩膜层上的第三保护层。
  5. 根据权利要求4所述的偏光片，其中，还包括位于所述第三保护层上的保护膜。
  6. 根据权利要求5所述的偏光片，其中，还包括依次位于所述第一保护层下的粘合层和离型膜。
  7. 根据权利要求1所述的偏光片，其中，所述彩膜层包括彩色阻块，其中所述量子点被包含在所述彩色阻块中。
  8. 根据权利要求7所述的偏光片，其中，所述彩膜层还包括位于相邻的所述彩色阻块之间的黑矩阵。
  9. 根据权利要求6所述的偏光片，其中，所述粘合层的材料包括压敏胶，所述第一保护层、所述第二保护层和所述第三保护层的材料包括三醋酸纤维素，以及所述偏光功能层的材料包括聚乙烯醇。
  10. 根据权利要求1所述的偏光片，其中，所述量子点的材料包括半导体材料。
  11. 一种显示装置，其中，包括阵列基板和与所述阵列基板相对的对置基板，以及根据权利要求1-10中任一项所述的偏光片，所述偏光片设置 在所述阵列基板和所述对置基板中的至少一者上。
  12. 根据权利要求11所述的显示装置，其中，所述偏光片被设置在所述阵列基板上，所述偏光片被设置为使所述彩膜层相比于所述偏光层更加远离所述对置基板。
  13. 根据权利要求11所述的显示装置，其中，所述偏光片被设置在所述对置基板上，所述偏光片被设置为使所述彩膜层相比于所述偏光层更加远离所述阵列基板。
  14. 根据权利要求12所述的显示装置，其中，所述偏光片被设置在所述对置基板和所述阵列基板上，所述对置基板上的所述偏光片被设置为使所述彩膜层相比于所述偏光层更加远离所述阵列基板，所述阵列基板上的所述偏光片被设置为使所述彩膜层相比于所述偏光层更加远离所述对置基板。
  15. 根据权利要求13或14所述的显示装置，其中，所述对置基板还包括黑矩阵，所述黑矩阵位于所述对置基板的未设置所述偏光片的一侧或位于所述彩膜层中。
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CN107608132A (zh) * 2017-09-18 2018-01-19 合肥惠科金扬科技有限公司 一种液晶显示装置
CN107783338A (zh) * 2017-09-18 2018-03-09 合肥惠科金扬科技有限公司 一种量子点液晶显示装置
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