WO2016145975A1 - 偏振光片及其制备方法和显示面板、显示装置 - Google Patents

偏振光片及其制备方法和显示面板、显示装置 Download PDF

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Publication number
WO2016145975A1
WO2016145975A1 PCT/CN2016/074445 CN2016074445W WO2016145975A1 WO 2016145975 A1 WO2016145975 A1 WO 2016145975A1 CN 2016074445 W CN2016074445 W CN 2016074445W WO 2016145975 A1 WO2016145975 A1 WO 2016145975A1
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Prior art keywords
layer
polarizer
body layer
film
conductive
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Ceased
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PCT/CN2016/074445
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English (en)
French (fr)
Inventor
王俊伟
于海峰
黄海琴
李东熙
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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Priority to US15/518,449 priority Critical patent/US10459275B2/en
Publication of WO2016145975A1 publication Critical patent/WO2016145975A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • G02F1/133345—Insulating layers
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • 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
    • G02F1/135—Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136204—Arrangements to prevent high voltage or static electricity failures
    • 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
    • G02F1/133388—Constructional arrangements; Manufacturing methods with constructional differences between the display region and the peripheral region
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • 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
    • G02F2202/22—Antistatic materials or arrangements
    • 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
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a polarizing plate, a preparation method thereof, a display panel, and a display device.
  • ADS Advanced Super Dimension Switch
  • IPS In-Plane-Switching
  • ADS display panel products are prone to generate a large amount of static electricity during the tearing process. Under certain abnormal conditions, the generated static electricity cannot be quickly dissipated, which causes the polarization of the liquid crystal, resulting in unrecoverable mura (ie, the display brightness is uneven, with each Traces).
  • the existing ADS product preparation process has no special treatment for this process.
  • the module is assembled immediately after tearing the film, and the conductive tape (generally about 1 cm wide, about 1 cm long, one on each side) is attached to the CF (color).
  • the filter Color Filter
  • ITO Indium Tin Oxides
  • the product frame are connected; thus, there may be a certain degree of random failure, which increases the probability of product failure.
  • the embodiment of the invention provides a polarizing plate, a preparation method thereof, a display panel and a display device, which are used for preventing the mura from being generated in the process of tearing the film, reducing the probability of product defects, simplifying the module process and preventing leakage. Conductive.
  • the embodiment of the invention provides a polarizing plate, which comprises a main body layer, a protective film layer, a conductive layer and a release film; wherein:
  • the first outer surface of the main body layer is coated with the protective film layer
  • the second outer surface of the main body layer is coated with the release film
  • the conductive layer is applied to the periphery of the body layer.
  • the first outer surface of the body layer is vapor-deposited with a metal film, and the metal film grid produces a polarization direction that coincides with a polarization direction of the body layer.
  • the metal film comprises an aluminum film or a copper film.
  • the protective film layer is applied to the first outer surface of the body layer through a pressure sensitive adhesive layer.
  • the pressure sensitive adhesive layer is a glue layer whose conductive diffusion parameter is greater than a preset threshold.
  • the pressure sensitive adhesive layer is a conductive polymer material, an electrical network, a carbon black doped or a conductive particle doped material.
  • the size of the protective film layer is larger than the size of the body layer.
  • the protective film layer and the conductive layer are bonded by a conductive adhesive layer.
  • the release film layer and the conductive layer are bonded by a conductive adhesive layer.
  • the conductive layer is a carbon black rubber layer or an aluminum film.
  • the embodiment of the invention further provides a method for preparing a polarizer, comprising:
  • a conductive layer is applied to the periphery of the body layer, and a release film is applied to the outer surface of the conductive layer.
  • a release film applied to the other surface of the body layer covers the body layer and extends to the periphery of the body layer.
  • the embodiment of the invention further provides a display panel comprising a liquid crystal panel and two polarizing plates after removing the release film; wherein:
  • the first polarizer is applied to the first outer surface of the liquid crystal panel through the second outer surface of the first polarizer;
  • the second polarizer is applied to the second outer surface of the liquid crystal panel through the second outer surface of the second polarizer.
  • Embodiments of the present invention also provide a display device including the display panel as described above.
  • the polarizing plate provided by the embodiment of the invention, the preparation method thereof, the display panel and the display device add a conductive layer on the periphery of the polarizing plate.
  • the polarizing plate provided by the embodiment of the invention facilitates the process production, enhances the self-conductivity of the polarizer, increases the conduction performance of the charge and increases the charge release path through the structural design, reduces the occurrence of the electrostatic mura, and reduces The probability of product failure simplifies the module process and prevents leakage from being conductive.
  • FIG. 1a is a schematic diagram showing the basic structure of a polarizing plate according to an embodiment of the present invention
  • 1b is a schematic cross-sectional view showing a periphery of a polarizing plate according to an embodiment of the present invention
  • FIG. 2 is a schematic view showing an electrostatic discharge path during a tear film process according to an embodiment of the present invention
  • 3a is a schematic diagram of a preparation process of a polarizing plate according to an embodiment of the present invention.
  • 3b is a schematic view showing the application of a conductive layer in an embodiment of the present invention.
  • FIG. 4a is a schematic structural view of a display panel according to an embodiment of the present invention.
  • 4b is a cross-sectional view showing a portion where a liquid crystal panel and a polarizing plate are bonded together in an embodiment of the present invention.
  • the structure of the polarizing film is pre-processed in the process of tearing the film. It can effectively release the generated static electricity, prevent the occurrence of static electricity mura, reduce the probability of product defects, simplify the module process, and prevent leakage and conduction.
  • the polarizing plate provided by the embodiment of the present invention includes a main body layer 11, a protective film layer 12, a conductive layer 13, and a release film 14, wherein: the first outer surface of the main body layer 11 is coated with a protective film layer 12; The second outer surface is coated with a release film 14; the outer layer of the main body layer 11 is coated with a conductive layer 13.
  • FIG. 1a the basic structure of a polarizer provided by an embodiment of the present invention is shown. It is intended that the release film 14 , the main body layer 11 and the conductive layer 13 located on the periphery of the main body layer 11 and the protective film layer 12 are sequentially arranged from bottom to top.
  • the release film 14 may include two portions, one portion being a release film 141 in contact with the body layer 11, and the other portion being a release film 142 in contact with the conductive layer 13.
  • the release film 142 and the conductive layer 13 may be bonded by a conductive adhesive layer.
  • the first outer surface may be a surface forming a polarized light in the body layer, the second outer surface being the surface of the body layer opposite the first outer surface, and the remaining outer surface of the body layer (such as the side shown in FIG. 1) ) is the periphery of the main layer.
  • the conductive layer 13 has a structure having a protective film on both sides before being applied to the main body layer 11, and a protective film on one side is left after being applied to the polarizing plate.
  • the size of the protective film layer 12 may be slightly larger than the size of the main body layer 11, and the portion larger than the main body layer 11 may cover the conductive layer 13 having the same thickness as the main body layer.
  • FIG. 1b is a schematic cross-sectional view showing a periphery of a polarizer according to an embodiment of the present invention.
  • the conductive layer 13 and the protective film layer 12 are bonded by an adhesive.
  • the adhesive may be a conductive adhesive layer.
  • the conductive layer 13 is applied around the periphery of the main body layer 11.
  • the generated static electricity can diffuse around the ground through the conductive layer, the surrounding conductive adhesive layer is in contact with the metal on the surface of the liquid crystal panel, and the metal contacts the ground through the module, so that the charge can be dissipated and conducted to Ground.
  • the problem that the unprobable mura is caused by the static electricity generated during the tearing process cannot be quickly dissipated, and the probability of product failure is increased.
  • the polarizer provided by the embodiment of the invention increases the conductivity of the charge and increases the release path of the charge through the structural design.
  • the protective film layer 12 is applied to the main body layer 11 through a pressure-sensitive adhesive layer.
  • the pressure-sensitive adhesive layer of the protective film layer 12 may be a treated adhesive layer having good conductive diffusibility, and a rubber layer having a conductive diffusion parameter greater than a preset threshold may be selected.
  • the pressure sensitive adhesive layer can be, but is not limited to, a material that is doped with a conductive polymer material, an electrical network, carbon black, or conductive particles.
  • a metal film is vapor-deposited between the main body layer 11 and the protective film layer 12 provided by the embodiment of the present invention.
  • a general metal film can be used.
  • the metal film not only has good electrical conductivity, but also generates polarized light through the grating structure, metal
  • the lattice structure of the film refers to a strip-like light leakage structure like a grating, and the slit of the grating is usually on the order of mm (mm).
  • the metal film may be a copper film or an aluminum film. More preferably, the polarization direction of the metal film grid coincides with the polarization direction of the body layer 11.
  • the thickness of the conductive layer 13 is the same as or close to the thickness of the body layer 11, and has good electrical conductivity.
  • the side of the conductive layer 13 that is connected to the protective film layer 12 is more viscous, and the side that is connected to the release film 14 is less viscous.
  • the conductive layer 13 may be a carbon black rubber layer or an aluminum film, and the thickness is equivalent to the thickness of the main body layer 11.
  • the conductive layer may have a thickness of 50 to 200 um.
  • FIG. 2 is a schematic diagram of a charge release path of a polarizer according to an embodiment of the present invention.
  • Embodiments of the present invention enhance the conductivity of the polarizer itself and add a conductive layer around the periphery of the polarizer. In this way, during the tearing process, the generated static electricity will diffuse through the conductive layer and the surface of the polarizing plate to the ground.
  • the surrounding conductive layer is in contact with the metal on the surface of the panel, and the metal contacts the ground through the module to dissipate the charge. And conduction to the ground.
  • the basic principle is to increase the conduction performance of the charge and increase the charge release path through the structural design.
  • a schematic diagram of a preparation process of a polarizer according to an embodiment of the present invention may include the following steps:
  • a release film applied to the other surface of the body layer may cover the body layer and extend to the periphery of the body layer.
  • the protective film layer 12 is applied on the surface of the main layer from which the release film is removed.
  • a conductive layer 13 is applied on the periphery of the main body layer, and a release film is applied on the outer surface of the conductive layer 13.
  • FIG. 3b it is a schematic diagram of the adhesion of the protective film layer 12 and the conductive layer 13.
  • the embodiment of the present invention further provides a display panel. Since the principle of solving the problem of the display panel is similar to that of the polarizing plate described above, the implementation of the polarizing film can be referred to, and the repeated description is not repeated. .
  • a schematic structural view of a display panel according to an embodiment of the present invention includes a liquid crystal panel 41 and two polarizing plates 42 as described in the embodiment of the present invention after removing the release film;
  • a polarizing plate 421 is applied to the first outer surface of the liquid crystal panel 41 through the second outer surface of the first polarizing plate 421;
  • the second polarizing plate 422 is applied to the second outer surface of the second polarizing plate 422.
  • the second outer surface of the liquid crystal panel 41 As shown in FIG. 4b, it is a schematic cross-sectional view of the liquid crystal panel 41 and the polarizing plate 42 in FIG. 4a (shown by dotted squares).
  • TAC is triacetin
  • PVA is polyvinyl alcohol
  • two layers of TAC are formed by sandwiching PVA to form a main layer. The role of TAC is to ensure the elongation and mechanical strength of PVA after stretching.
  • an embodiment of the present invention further provides a display device including the display panel as described above. Since the principle of solving the problem of the display panel is similar to that of the polarizing plate described above, the implementation thereof can be referred to the implementation of the polarizing plate, and the repeated description is omitted.

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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)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

一种偏振光片，包括偏振光片主体层(11)、保护膜层(12)、导电层(13)和离型膜(14)。主体层的第一外表面贴敷有保护膜层，主体层的第二外表面贴敷有离型膜，主体层的外围贴敷有导电层。这种偏振光片的结构可以预防偏振光片在撕膜过程中产生mura，降低产品不良的概率，简化模组工序，防止漏贴导电。还公开了一种偏振光片的制备方法、以及一种显示面板和显示装置。

Description

偏振光片及其制备方法和显示面板、显示装置 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种偏振光片及其制备方法和显示面板、显示装置。
背景技术
ADS(高级超维场转换，Advanced Super Dimension Switch)技术是为解决大尺寸、高清晰度桌面显示器和液晶电视应用而开发的广视角技术，其是硬屏技术的一种。ADS技术克服了常规IPS(In-Plane-Switching，面内切换)技术透光效率低的问题，在宽视角的前提下，实现高的透光效率。
ADS显示面板产品在撕膜过程中容易产生大量静电，某些异常情况下，产生的静电不能快速耗散，进而引起了液晶的极化，导致不可恢复的mura(即显示器亮度不均匀，具有各种痕迹)。
现有的ADS产品制备流程对这一制程无特殊处理，一般是在撕膜后即时组装模组，并贴附导电胶带(一般宽约1cm，长约1cm，左右各贴一个)将CF(彩色滤光片，Color Filter)、ITO(铟锡氧化物，Indium Tin Oxides)和产品外框相连接；这样，可能存在一定程度的随机不良，增加了产品不良的概率。
发明内容
本发明实施例提供一种偏振光片及其制备方法和显示面板、显示装置，用以预防偏振光片在撕膜过程中产生mura，降低产品不良的概率，简化了模组工序，防止漏贴导电。
本发明实施例提供一种偏振光片，包括主体层、保护膜层、导电层和离型膜；其中：
所述主体层的第一外表面贴敷有所述保护膜层；
所述主体层的第二外表面贴敷有所述离型膜；
所述主体层的外围贴敷有所述导电层。
可选地，所述主体层的第一外表面蒸镀有金属膜，所述金属膜格栅产生的偏振方向与所述主体层的偏振方向一致。
可选地，所述金属膜包括铝膜或者铜膜。
可选地，所述保护膜层通过压敏胶层贴敷于所述主体层的第一外表面。
可选地，所述压敏胶层为导电扩散性参数大于预设阈值的胶层。
可选地，所述压敏胶层为导电聚合物材料、电网络、炭黑掺杂或者导电粒子掺杂的材料。
可选地，所述保护膜层的尺寸大于所述主体层的尺寸。
可选地，所述保护膜层与所述导电层通过导电胶层粘合。
可选地，所述离型膜层与所述导电层通过导电胶层粘合。
可选地，所述导电层为炭黑胶层或者铝膜。
本发明实施例还提供了一种偏振光片制备方法，包括：
在具有预设尺寸的主体层的两个外表面贴敷离型膜；
去除该主体层一个表面的离型膜后，在去除离型膜的主体层的表面贴敷保护膜层；以及
在该主体层的外围贴敷导电层，并在导电层的外表面贴敷离型膜。
可选地，贴敷在所述主体层的另一个表面上的离型膜覆盖所述主体层并延伸至所述主体层的外围。
本发明实施例还提供了一种显示面板，包括一液晶面板和两个上述去除离型膜后的偏振光片；其中：
第一偏振光片通过所述第一偏振光片的第二外表面贴敷于所述液晶面板的第一外表面；
第二偏振光片通过所述第二偏振光片的第二外表面贴敷于所述液晶面板的第二外表面。
本发明实施例还提供了一种显示装置，包括如上所述的显示面板。
本发明实施例提供的偏振光片及其制备方法和显示面板、显示装置，在偏振光片外围增加导电层。这样，在撕膜过程中，产生的静电会通过导电层向接地的四周扩散，将电荷耗散掉和传导到地。本发明实施例提供的偏振光片便于工艺生产，增强了偏振光片自身导电性，通过结构设计增加了电荷的导通性能和增加了更多的电荷释放路径，减少了静电mura的发生，降低产品不良的概率，简化了模组工序，防止漏贴导电。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分 地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。
附图说明
此处所说明的附图用来提供对本发明实施例的进一步理解，构成本发明实施例的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1a为本发明实施例中，偏振光片的基本结构示意图；
图1b为本发明实施例中，偏振光片外围的剖面示意图；
图2为本发明实施例中，撕膜过程中，静电释放路径示意图；
图3a为本发明实施例中，偏振光片的制备流程示意图；
图3b为本发明实施例中，导电层的贴敷示意图；
图4a为本发明实施例中，显示面板的结构示意图；以及
图4b为本发明实施例中，液晶面板与偏振光片贴合处的剖面示意图。
具体实施方式
为解决现有技术中，在显示面板产品撕膜过程中产生大量静电导致mura，增加产品不良概率的问题，本发明实施例中，通过对偏振光片结构进行预加工，使在撕膜过程中可以有效释放产生的静电，预防静电mura的发生，降低产品不良的概率，简化了模组工序，防止漏贴导电。
以下结合说明书附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明，并且在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。
实施例一
本发明实施例提供的偏振光片包括主体层11、保护膜层12、导电层13和离型膜14，其中：主体层11的第一外表面贴敷有保护膜层12；主体层11的第二外表面贴敷有离型膜14；主体层11的外围贴敷有导电层13。如图1a所示，为本发明实施例提供的偏振光片的基本结构示 意图，由下至上依次为离型膜14，主体层11以及位于主体层11外围的导电层13，保护膜层12。其中，离型膜14可以包括两部分，一部分为与主体层11接触的离型膜141，另一部分为与导电层13接触的离型膜142。可选的，离型膜142与导电层13之间可以通过导电胶层粘合。
通常，第一外表面可以为主体层中形成偏振光的表面，第二外表面即为主体层中与第一外表面相对的表面，主体层的其余外表面(如图1中示出的侧面)即为该主体层的外围。
需要说明的是，导电层13在贴敷到主体层11上之前也是两面具有保护膜的结构，在贴敷到偏振光片上以后保留其中一面的保护膜。具体实施时，保护膜层12的尺寸可以略大于主体层11的尺寸，大于主体层11的部分可以覆盖与主体层厚度相同的导电层13。如图1b所示，为本发明实施例提供的偏振光片外围的剖面示意图。导电层13与保护膜层12之间通过粘合剂粘合。可选的，该粘合剂可以为导电胶层。
本发明实施例提供的偏振光片，通过在主体层11外围四周贴敷导电层13。在撕膜过程中，产生的静电可以通过导电层向接地的四周扩散，四周的导电胶层与液晶面板表面的金属接触，金属通过模组与地接触，从而可以将电荷耗散掉和传导到地。从而，避免在撕膜过程中由于产生的静电不能快速耗散导致不可恢复的mura，增加产品不良概率的问题。
实施例二
本发明实施例提供的偏振光片，通过结构设计增加了电荷的导通性和增加了电荷的释放路径。可选的，具体实施时，保护膜层12通过压敏胶层贴敷于主体层11上。为了进一步提高电荷的导通性，该保护膜层12的压敏胶层可以为经过处理的具有良好的导电扩散性的胶层，可以选择导电扩散性参数大于预设阈值的胶层。例如，该压敏胶层可以但不限于为导电聚合物材料、电网络、炭黑掺杂或者导电粒子掺杂的材料。
实施例三
为了进一步提高电荷的导通性，本发明实施例提供的主体层11和保护膜层12之间蒸镀有金属膜。具体实施时，可以使用一般的金属膜。金属膜不仅具有良好的导电性，又可通过格栅结构产生偏振光，金属 膜的格栅结构是指像光栅一样的条状漏光结构，通常光栅的狭缝在mm(毫米)量级。具体实施时，考虑到工艺加工难度，可选的，该金属膜可以为铜膜或者铝膜。更佳的，金属膜格栅产生的偏振方向与主体层11的偏振方向一致。
具体实施时，导电层13的厚度与主体层11的厚度相同或者接近，具有良好的导电性。可选的，导电层13与保护膜层12连接的一面粘性较强，与离型膜14连接的一面粘性较弱。可选的，导电层13可以为炭黑胶层或者铝膜，厚度与主体层11厚度相当，可选的，导电层厚度可以在50～200um之间。
如图2所示，为本发明实施例提供的偏振光片电荷释放路径示意图。
本发明实施例增强了偏振光片自身导电性，并且在偏振光片外围增加导电层。这样，在撕膜过程中，产生的静电会通过导电层、偏振光片表面向接地的四周扩散，四周的导电层与面板表面的金属接触，金属通过模组与地接触，将电荷耗散掉和传导到地。其基本的原理即为通过结构设计增加了电荷的导通性能和增加了更多的电荷释放路径。
实施例四
如图3a所示，为本发明实施例提供的偏振光片的制备流程示意图，可以包括以下步骤：
S31、在具有预设尺寸的主体层的两个外表面贴敷离型膜。
其中，贴敷在所述主体层的另一个表面上的离型膜可以覆盖所述主体层并延伸至所述主体层的外围。
S32、去除该主体层一个表面的离型膜后，在去除离型膜的主体层的表面贴敷保护膜层12。
S33、在该主体层的外围贴敷导电层13，并在导电层13的外表面贴敷离型膜。
如图3b所示，为保护膜层12和导电层13的贴敷示意图。
基于同一发明构思，本发明实施例还提供了一种显示面板，由于该显示面板解决问题的原理与上述的偏振光片相似，因此其实施可以参见偏振光片的实施，重复之处不再赘述。
实施例五
如图4a所示，为本发明实施例提供的显示面板的结构示意图，包括一液晶面板41和两个去除离型膜后的、如本发明实施例所述的偏振光片42；其中：第一偏振光片421通过第一偏振光片421的第二外表面贴敷于液晶面板41的第一外表面；第二偏振光片422通过第二偏振光片422的第二外表面贴敷于液晶面板41的第二外表面。如图4b所示，其为图4a中的液晶面板41与偏振光片42贴合处(以虚线方框示出)的剖面示意图。图4b中，TAC是三醋酸纤维脂，PVA是聚乙烯醇，两层TAC之间夹着PVA成膜，组成主体层，其中，TAC的作用是保证PVA拉伸后的延展和机械强度。
基于同一发明构思，本发明实施例还提供了一种显示装置，所述显示装置包括如上所述的显示面板。由于该显示面板解决问题的原理与上述的偏振光片相似，因此其实施可以参见偏振光片的实施，重复之处不再赘述。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例做出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (13)

  1. 一种偏振光片，其特征在于，包括主体层、保护膜层、导电层和离型膜；其中：
    所述主体层的第一外表面贴敷有所述保护膜层；
    所述主体层的第二外表面贴敷有所述离型膜；
    所述主体层的外围贴敷有所述导电层。
  2. 如权利要求1所述的偏振光片，其特征在于，
    所述主体层的第一外表面蒸镀有金属膜，所述金属膜格栅产生的偏振方向与所述主体层的偏振方向一致。
  3. 如权利要求2所述的偏振光片，其特征在于，所述金属膜包括铝膜或者铜膜。
  4. 如权利要求1所述的偏振光片，其特征在于，所述保护膜层通过压敏胶层贴敷于所述主体层的第一外表面。
  5. 如权利要求4所述的偏振光片，其特征在于，所述压敏胶层为导电扩散性参数大于预设阈值的胶层。
  6. 如权利要求5所述的偏振光片，其特征在于，所述压敏胶层为导电聚合物材料、电网络、炭黑掺杂或者导电粒子掺杂的材料。
  7. 如权利要求1所述的偏振光片，其特征在于，所述保护膜层的尺寸大于所述主体层的尺寸；以及
    所述保护膜层与所述导电层通过导电胶层粘合。
  8. 如权利要求1所述的偏振光片，其特征在于，
    所述离型膜层与所述导电层通过导电胶层粘合。
  9. 如权利要求1～8任一权利要求所述的偏振光片，其特征在于，所述导电层为炭黑胶层者铝膜。
  10. 一种如权利要求1所述的偏振光片的制备方法，其特征在于，包括：
    在具有预设尺寸的主体层的两个外表面贴敷离型膜；
    去除该主体层一个表面的离型膜后，在去除离型膜的主体层的表面贴敷保护膜层；以及
    在该主体层的外围贴敷导电层，并在导电层的外表面贴敷离型膜。
  11. 如权利要求10所述的方法，其特征在于，贴敷在所述主体层 的另一个表面上的离型膜覆盖所述主体层并延伸至所述主体层的外围。
  12. 一种显示面板，其特征在于，包括一液晶面板和两个去除离型膜后的、如权利要求1～9任一权利要求所述的偏振光片；其中：
    第一偏振光片通过所述第一偏振光片的第二外表面贴敷于所述液晶面板的第一外表面；
    第二偏振光片通过所述第二偏振光片的第二外表面贴敷于所述液晶面板的第二外表面。
  13. 一种显示装置，其特征在于，包括如权利要求12所述的显示面板。
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